Sustainable land use strategies to support bioenergy described in Industrial Biotechnology journal

Public release date: 9-Feb-2012
[ | E-mail | Share ]

Contact: Cathia Falvey
cfalvey@liebertpub.com
914-740-2100 x2165
Mary Ann Liebert, Inc./Genetic Engineering News

New Rochelle, NY, February 9, 2012?Applying 21st century tools and technologies to manage land use, maximize biomass production, and increase the efficiency of processes for extracting energy from renewable resources will enable the biofuels industry to overcome current challenges in bioenergy production, according to a comprehensive review article published in Industrial Biotechnology, a peer-reviewed journal from Mary Ann Liebert, Inc. (http://www.liebertpub.com). The article is available free online at http://www.liebertpub.com/ind.

Robert Diltz, Heather Luckarift, and Glenn Johnson, Air Force Research Laboratory, Tyndall Air Force Base, FL, and Universal Technology Corporation, Dayton, OH, provide a detailed review of the current methods in use for producing bioenergy and the key hurdles yet to overcome. The article, "Sustainable Land Use for Bioenergy in the 21st Century," focuses on three main areas: enhancing the growth of biomass from a variety of resources; optimizing the thermo-chemical conversion of biomass to energy; and implementing land management strategies to create a sustainable biomass-to-energy industry that does not have an undesirable impact on the environment. The authors emphasize the need for innovative methods to increase the energy density of biomass, enhance growth strategies, improve energy yield, and maximize the use of waste generated as a result of biomass processing.

"It is so important that we begin to envision bioenergy development from a broader systems perspective with an eye on sustainability. This review explicitly captures this need." says Larry Walker, PhD, Co-Editor-in-Chief and Professor, Biological & Environmental Engineering, Cornell University, Ithaca, NY.

###

Industrial Biotechnology, led by Co-Editors-in-Chief Larry Walker, PhD, and Glenn Nedwin, PhD, MBA, President, Human Therapeutics Division, Intrexon Corporation, Germantown, MD is an authoritative journal focused on biobased industrial and environmental products and processes, published bimonthly in print and online. The Journal reports on the science, business, and policy developments of the emerging global bioeconomy, including biobased production of energy and fuels, chemicals, materials, and consumer goods. The articles published include critically reviewed original research in all related sciences (biology, biochemistry, chemical and process engineering, agriculture), in addition to expert commentary on current policy, funding, markets, business, legal issues, and science trends. Industrial Biotechnology offers a premier forum bridging basic research and R&D with later-stage commercialization for sustainable biobased industrial and environmental applications.

Mary Ann Liebert, Inc (http://www.liebertpub.com) is a privately held, fully integrated media company known for establishing authoritative peer-reviewed journals in many promising areas of science and biomedical research, including Environmental Engineering Science and Sustainability: The Journal of Record. Its biotechnology trade magazine, Genetic Engineering & Biotechnology News (GEN), was the first in its field and is today the industry's most widely read publication worldwide. A complete list of the firm's 70 journals, books, and newsmagazines is available at http://www.liebertpub.com.

Mary Ann Liebert, Inc. 140 Huguenot St., New Rochelle, NY 10801-5215 http://www.liebertpub.com
Phone: (914) 740-2100 (800) M-LIEBERT Fax: (914) 740-2101

[ | E-mail | Share ]

 

AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.

Read the original:
Sustainable land use strategies to support bioenergy described in Industrial Biotechnology journal

DA Establishes DNA Crop Library

MANILA, Philippines - The Department of Agriculture (DA) is establishing a DNA Library of Crops, Fisheries, and Livestock (LCFL) which will help speed up crop improvement and enhance Philippines' ability to benefit economically from genetic and proprietary rights.

DA already started the DNA LCFL Library under its 2011 biotechnology program which for the first time received a P150 million budget under the 2011 General Appropriations Act (GAA).

DA Undersecretary Segfredo R. Serrano said that DA already has a more stable budget for biotechnology program office (BPO) as government recognizes the function of new techniques in its poverty and hunger reduction and food security aims.

"We're making sure we're getting our due share from the more than 60 percent budget increase for the DA system," said Serrano.

Dr. Candida B. Adalla, director of DA's biotechnology program office (BPO), in an interview, said they have already started the project last year.

"We have already done barcoding for native chicken. It will be a continuing thing as we work on other crops," Adalla said.

For about 10 years since 2000, the BPO obtained its budget from the US PL480 Food forr Peace program for a total of P280 million. But the GAA funding through the Bureau of Agricultural Research (BAR) will make commitments for BPO more permanent through a yearly allocation.

Adalla said the DNA Library is an electronic or digital database of genetic materials that will be kept and maintained by the Bureau of Plant Industry's National Seed Industry Council.

"If I'm a breeder I can easily improve on my crop because I will have access to a database of the genetic material that I need," she said.

The database will enhance the country's intellectual property claims for plant and animal genetic development.

Under the 2011 PL480 research and development program, BPO had 28 programs for crops and plants, six programs for livestock and poultry, and three for fisheries and aquatic species.

The program under the 2011 GAA include varietal improvement for non genetically modified (GM) crops using biotechnology tools such as marker assisted selection or breeding which took up the highest number of projects at 22 percent of total while genetic conservation and gene banking got 14 percent.

Other BPO projects are varietal improvement for GM technologies, improvement of bioprocessing using biotechnology tools, commercialization of biotechnology products, and support for policy, regulation, and quality assurance and safety.

BPO is also allocating a significant budget for skills or capability building as government needs to strengthen presence of research experts although it already has a good number.

"We have very robust pool of scientists. There are many at UPLB (University of the Philippines Los Banos) as we offer a BS on Agricultural Biotechnology. In terms of budget our P150 million for biotechnology research and development is significant in contrast to zero, said Adalla.

"Before we depended on grant, foreign projects. This time it's people's money allocated already which means that government has recognized the importance of biotechnology," said Adalla.

Go here to see the original:
DA Establishes DNA Crop Library

Posted in DNA

Group wants DNA test in 1992 Ky. 'satanic' killing

LOUISVILLE, Ky. (AP) — When Rhonda Sue Warford died in a rural field near Brandenburg, she had multiple stab wounds to her chest, back and neck, including one that destroyed her brain stem, and two gray hairs clenched in her right hand.

Two decades later, those hairs are at the center of a legal battle over DNA testing that appellate attorneys hope will upend the convictions of two men serving life in prison for Warford's murder.

The Innocence Project, a New York-based group that works with inmates to obtain DNA testing, is reinvestigating the murder of Warford, a 19-year-old from Louisville who died in 1992 in what prosecutors called a satanic ritual murder. The legal fight has made its way to the Kentucky Supreme Court, which is weighing whether to hear the appeal of 42-year-old Garr Keith Hardin and 41-year-old Jeffrey Dewayne Clark's and order DNA testing on the hairs.

Their case is a challenge to the scope of Kentucky's post-conviction DNA testing law, which applies only to death row inmates and is considered by defense attorneys to be among the weakest in the country. Kentucky legislators are also considering a bill that would allow more inmates access to DNA testing of evidence.

The utility of testing the hairs is a point of contention between prosecutors, who say the tests won't help Hardin and Clark, and the Innocence Project, which says tests matching someone else will clear their clients.

In briefs filed with the Kentucky Supreme Court, Innocence Project attorney Jason Kreag said test results on the hairs could match an alternate suspect and definitively point to someone other than Hardin and Clark as the killer.

"Tragically, in many exoneration cases, the actual perpetrator has gone on to commit additional crimes while the wrong person served time in prison," Kreag said in a letter to the Kentucky Attorney General's Office.

Kentucky prosecutors oppose the testing. They say it won't exonerate the two convicted men, though it might point to a third person being involved.

"The evidence in the record is enough to sustain any convictions," said Assistant Attorney General Perry Ryan, who is handling the appeal.

Kreag declined to comment to The Associated Press, citing the ongoing investigation and legal proceedings. Warford's family declined to discuss the case.

Forty-eight states have post-conviction DNA testing laws. Some, such as Colorado, allow anyone convicted of a felony to seek testing while others limit the crimes that qualify for testing. Maryland and Washington state, for example, limit the eligible crimes to murder or sexual offenses.

Oklahoma and Massachusetts have no laws allowing post-conviction access to DNA testing.

At least three people in Kentucky have reached agreements with prosecutors for post-conviction DNA testing and left prison exonerated, but the testing didn't come under Kentucky's access law. Under that law, enacted in 2001, only death row inmates may petition a court to gain access to evidence and have it tested.

The case of Hardin and Clark has its roots in the on-again, off-again relationship between Warford and Hardin. They dated for a while, with sometimes volatile results.

A witness at Hardin's trial, Hope Jaggers, said Warford told Hardin she was pregnant. Hardin responded by saying "if you are pregnant, I will kill you and that ... baby," Jaggers testified in 1995.

Warford disappeared early on the morning of April 2, 1992, after telling her mother she was going out. Her mother, Mary Warford, called Louisville police to report her missing when the teen didn't return home.

Investigators found Warford's body, face down, clad in white canvas tennis shoes, red sweat pants, a dark blue shirt and a multicolored jacket, three days later in "Dead Horse Holler," a rural section of Meade County about 45 miles west of Louisville. An autopsy showed Warford had been stabbed multiple times. She had stab wounds on her hands, which prosecutors theorized were defensive injuries sustained in trying to fight off the attack.

A medical examiner found a tattoo of an inverted cross on Warford's left clavicle, as well as a hair on her sweat pants. DNA testing was unavailable, but the examiner called the hair similar to Hardin's. Detectives found Warford's fingerprint in Clark's car, even though he said Warford had not been in the vehicle since December 1991.

A search turned up occult-related items and documents and knives at the homes of Hardin and Clark. Both men also told detectives that they had taken part in Satanic worship either around the time of the slaying or in the past. Hardin told police detectives on April 7, 1992, that he had a "vision" that Warford, wearing red clothes, had been killed in a field. Prosecutors said Clark twice confessed to a fellow jail inmate that he killed Warford.

Prosecutors took a mix of physical and circumstantial evidence to trial, even telling jurors that the gray hairs were found but couldn't be matched to anyone suspected in Warford's death. Jurors convicted both men of first-degree murder, but declined to impose a death sentence.

In 2009, The Innocence Project began the push for DNA testing of the gray hairs, but prosecutors opposed the request.

Meade County Circuit Judge Sam Monarch rejected testing in January 2010, ruling that matching the evidence to a third party wouldn't exonerate Hardin and Clark and would only implicate a third party.

"Assuming that DNA analysis would confirm what was known prior to the time of trial, this would not be anything new," Monarch wrote.

Since then attorneys for Hardin and Clark have focused on another man, identified in some court records as "John Doe," as an alternate suspect. They say he is the source of the gray hairs. The defense attorneys said they have obtained DNA from "John Doe" to test, should the court grant DNA testing in the case.

Prosecutors are relying on Kentucky's high court to agree with Monarch's logic in rejecting the testing — that there's nothing new about the hairs that could help Hardin and Clark.

"The jury has already considered the fact that the gray hairs could not be tied to Mr. Clark, Mr. Hardin or Ms. Warford and found that this fact did not create a reasonable doubt," Monarch wrote.

______

Associated Press reporter Brett Barrouquere is on Twitter: http://twitter.com/BBarrouquereAP

Read the original post:
Group wants DNA test in 1992 Ky. 'satanic' killing

Posted in DNA

Blocking DNA repair enzyme could eventually lead to cancer therapy

Washington, Feb 11 (ANI): Scientists have shed light on what happens in cells when DNA is damaged.

The research group in the Faculty of Medicine 'n' Dentistry at the University of Alberta hopes that their latest discovery could one day be used to develop new therapies that target certain types of cancers.

Mark Glover, his graduate student Zahra Havali-Shahriari and post-doctoral fellow Nicolas Coquelle solved the structure of a DNA repair enzyme called polynucleotide kinase/phosphatase, or PNKP.

This allows them to see what is happening when this enzyme is repairing DNA.

In normal cells damaged DNA can lead to the breakdown of chromosomes and, ultimately, cancers. On the other hand, damaging DNA in cancer cells is a useful way to kill them. A long-term goal of this research is to find ways to specifically block PNKP from doing its repair work in cancer cells as a possible new cancer therapy.

"We can finally visualize it bound to the damaged ends of DNA," said Glover, a professor in the Department of Biochemistry.

"We've trapped the enzyme bound to the damaged DNA before it actually repairs the damage. One of the surprising things that comes out of this study is that we also see that the enzyme has to unwind the DNA double helix."

Work over the last 10 years, pioneered in large part in the Faculty of Medicine 'n' Dentistry, revealed that the enzyme PNKP plays a critical role in the repair of broken DNA ends produced by radiation and other agents.

Until now, though, no one knew how it finds and repairs the damage.

"It breaks base pairs [of DNA] apart, peels off the broken end and then PNKP inserts that broken end into the enzyme," explained Glover.

"It then performs a chemical reaction on the damaged DNA end, reversing the damage and releasing it so that the broken DNA strand can be welded together with the rest of the double helix.

"We now understand more about how this thing works; an enzyme that is protecting us from getting cancers."

However, the same enzyme also protects cancer cells.

"We find a lot of tumours become resistant to these therapies [radiation and chemotherapy]," said Glover.

"The holy grail of cancer therapy is to find drugs that we could give to people that would sensitize their tumours to these therapies.

"One way you could sensitize tumours is to target what they're using to repair damaged DNA. One of the ideas is that we could specifically inhibit this PNKP enzyme."

Sensitizing the tumours to therapies could also lower side effects, insisted Glover.

The lab is already starting to test some compounds that could act as inhibitors for PNKP in tumours and they've seen some positive early results.

Because radiation is proven effective in some but not all cancers, new treatment avenues are necessary. Glover is playing a vital role in moving potential new treatment forward.

"It requires a lot of basic research to find out what's going on in all these different cancers," he added.

The study has been published in the Proceedings of the National Academy of Sciences, a high-impact scientific journal. (ANI)

Excerpt from:
Blocking DNA repair enzyme could eventually lead to cancer therapy

Posted in DNA

DNA Brands' Television Interview to Air on Fox Business Network

BOCA RATON, Fla., Feb. 8, 2012 (GLOBE NEWSWIRE) -- DNA Brands, Inc. (DNAX.OB) today announced that an interview with Darren Marks, the Company's CEO, will air nationally on the Fox Business Network on Wednesday evening February 8, 2012 at 10:30 Pacific time and then again at the same time on the following two Wednesdays. To view the interview click the following link: http://www.youtube.com/watch?v=TLNn5vK5IeA

Mr. Marks said, "Having the opportunity to be interviewed by Mr. Crowley, such a well-known and respected figure in the financial community, was a real honor. As a Company we have a powerful story to tell and interviews like this give us a chance to convey our message coast-to-coast to consumer markets and the investment community alike." Mr. Marks concluded, "We have been featured in several Money-Talk Radio programs."

About Wall Street Cast/Steve Crowley/Money Talk Radio http://www.moneychannel.tv

Steve Crowley is the Editor and Host of the daily "American Scene" Radio programs which have been airing nationally since June 1990. After an impressive career as a partner in a CPA firm, a Financial Reporter for WJAR-TV 10 in Providence and Host of "Money Talks", a PBS television program, Mr. Crowley made the full-time transition to the world of television and radio broadcasting. Steve then became the Financial Reporter for WPLG-TV10, the ABCV affiliate in the Miami-Fort Lauderdale market. Steve was also the Money Editor of ABC's "Good Morning America". Steve currently hosts America's #1 Money-Talk Radio Program, Steve Crowley's "American Scene". Today, 3,000,000 listeners take advantage of the three-hour daily broadcasts through the Information Radio Network, and on the Internet worldwide.

About DNA Brands, Inc.

DNA BRANDS, make DNA Energy Drink(R), the award-winning, best-tasting energy drink at the 2010 World Beverage Competition, and DNA Beef Jerky(TM) and DNA Shred Stix(TM). DNA Energy Drink(R) is a proprietary blend of quality ingredients in four flavors Citrus, Lemon Lime, Sugar Free Citrus and CRANRAZBERRY. DNA is a proud sponsor of many action sport teams consisting of top athletes from Motorcross, Surf, Wakeboard and Skateboard has received tremendous TV and media coverage.

Independent retailers throughout the state sell the DNA Brand products as well as national retailers including Walgreens, Race Trac and Circle K.

True to its actions sports roots, DNA BRANDS, INC., has earned national recognition through its sponsorship of the DNA Energy Drink/Jeff Ward Racing team where it competes on a world-class level in Supercross and Motocross, reaching millions of fans. DNA Energy Drink(R) can also be found in other action sports such as Surfing, BMX, Wakeboarding and Skateboarding and its athletes are recognized stars in their own right.

For more information about DNA Energy Drink, its athletes and sponsorships, please visit http://www.dnabrandsusa.com

The DNA Beverage Corp. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=7258

Safe Harbor Forward-Looking Statements

To the extent that statements in this press release are not strictly historical, including statements as to revenue projections, business strategy, outlook, objectives, future milestones, plans, intentions, goals, future financial conditions, future collaboration agreements, the success of the Company's development, events conditioned on stockholder or other approval, or otherwise as to future events, such statements are forward-looking, and are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The forward-looking statements contained in this release are subject to certain risks and uncertainties that could cause actual results to differ materially from the statements made.

Read the original:
DNA Brands' Television Interview to Air on Fox Business Network

Posted in DNA

Witness: LA Detective's DNA Matched Bite Mark

DNA taken from the mouth of a former police detective so closely matched saliva from a bite mark on the arm of a murdered woman that no one else could have produced that genetic similarity, a criminalist told jurors Friday.

Los Angeles Police Department scientist Jennifer Francis, who analyzed evidence in the 26-year-old murder case, offered a conclusion that bolstered prosecution claims that defendant Stephanie Lazarus murdered her romantic rival.

Francis said the DNA of Lazarus was found on the bite mark discovered on victim Sherri Rasmussen's body after she was slain in 1986.

The case lay dormant and was reopened after two decades, with DNA analysis credited with reviving the case and implicating Lazarus.

The 51-year-old Lazarus, once a decorated LAPD investigator, listened attentively as Francis provided the strongest evidence against her.

Lazarus has pleaded not guilty and her lawyer, Mark Overland, has suggested that the DNA swabs taken at the time of Rasmussen's killing were corrupted over the years and are not reliable evidence.

Prosecutors claim that Lazarus was consumed with jealousy when her longtime lover, John Ruetten, announced he had decided to marry Rasmussen, a nursing supervisor at a hospital. When Rasmussen was killed, investigators believed she was the victim of a home invasion robbery.

Lazarus' name came up when the case was reopened and new detectives looked at the facts. Other police witnesses have told how they followed Lazarus surreptitiously and collected her DNA from a cup she discarded during a shopping trip.

It provided a partial match to DNA from the bite, they said. But it wasn't until Lazarus provided a DNA sample from her mouth while in custody that they had a perfect match, they said.

Francis described how she received swabs for testing that had been placed in an envelope a quarter century before. She identified pictures of the envelope which she said was in "ratty" condition and had at least one large tear. A photo projected on a courtroom screen showed a test tube top sticking out of a tear in the envelope. Francis said she also cut a slit in the envelope to remove the tube.

That has led to claims of evidence tampering by the defense.

During cross-examination by Overland, Francis said DNA evidence is highly susceptible to contamination and degradation over time. But she said laboratories have controls to prevent that.

She also testified that she was first approached to analyze materials in the case in 2004. In early 2005, she determined the person who made the bite mark was probably a female.

For unexplained reasons, the case then sat dormant again until 2009, when a detective reopened it and Francis compared the genetic profile of the biter with the DNA sample taken from Lazarus' mouth.

Under questioning by Deputy District Attorney Paul Nunez, Francis said the genetic profile of Lazarus and the bite mark would be expected to be found in one in 402 quadrillion individuals.

"On our Earth would you expect to find another individual with the profile of Stephanie Lazarus and Exhibit 30 (the bite)?" Nunez asked.

"No," said the witness.

The trial is in recess until Tuesday. Monday is a court holiday.

Here is the original post:
Witness: LA Detective's DNA Matched Bite Mark

Posted in DNA

Witness: Detective's DNA matched bite mark

LOS ANGELES (AP) — DNA taken from the mouth of a former police detective so closely matched saliva from a bite mark on the arm of a murdered woman that no one else could have produced that genetic similarity, a criminalist told jurors Friday.

Los Angeles Police Department scientist Jennifer Francis, who analyzed evidence in the 26-year-old murder case, offered a conclusion that bolstered prosecution claims that defendant Stephanie Lazarus murdered her romantic rival.

Francis said the DNA of Lazarus was found on the bite mark discovered on victim Sherri Rasmussen's body after she was slain in 1986.

The case lay dormant and was reopened after two decades, with DNA analysis credited with reviving the case and implicating Lazarus.

The 51-year-old Lazarus, once a decorated LAPD investigator, listened attentively as Francis provided the strongest evidence against her.

Lazarus has pleaded not guilty and her lawyer, Mark Overland, has suggested that the DNA swabs taken at the time of Rasmussen's killing were corrupted over the years and are not reliable evidence.

Prosecutors claim that Lazarus was consumed with jealousy when her longtime lover, John Ruetten, announced he had decided to marry Rasmussen, a nursing supervisor at a hospital. When Rasmussen was killed, investigators believed she was the victim of a home invasion robbery.

Lazarus' name came up when the case was reopened and new detectives looked at the facts. Other police witnesses have told how they followed Lazarus surreptitiously and collected her DNA from a cup she discarded during a shopping trip.

It provided a partial match to DNA from the bite, they said. But it wasn't until Lazarus provided a DNA sample from her mouth while in custody that they had a perfect match, they said.

Francis described how she received swabs for testing that had been placed in an envelope a quarter century before. She identified pictures of the envelope which she said was in "ratty" condition and had at least one large tear. A photo projected on a courtroom screen showed a test tube top sticking out of a tear in the envelope. Francis said she also cut a slit in the envelope to remove the tube.

That has led to claims of evidence tampering by the defense.

During cross-examination by Overland, Francis said DNA evidence is highly susceptible to contamination and degradation over time. But she said laboratories have controls to prevent that.

She also testified that she was first approached to analyze materials in the case in 2004. In early 2005, she determined the person who made the bite mark was probably a female.

For unexplained reasons, the case then sat dormant again until 2009, when a detective reopened it and Francis compared the genetic profile of the biter with the DNA sample taken from Lazarus' mouth.

Under questioning by Deputy District Attorney Paul Nunez, Francis said the genetic profile of Lazarus and the bite mark would be expected to be found in one in 402 quadrillion individuals.

"On our Earth would you expect to find another individual with the profile of Stephanie Lazarus and Exhibit 30 (the bite)?" Nunez asked.

"No," said the witness.

The trial is in recess until Tuesday. Monday is a court holiday.

Excerpt from:
Witness: Detective's DNA matched bite mark

Posted in DNA

High-Speed DNA Scans Help Most Lung Cancer Patients, Study Finds

February 12, 2012, 7:13 PM EST

By Robert Langreth

Feb. 12 (Bloomberg) -- More than half of lung and colon cancer patients may benefit from high-speed tests that detect DNA flaws doctors can target with existing medicines, a study found.

Researchers used a gene test made by closely held Foundation Medicine Inc. to sequence 145 cancer-associated genes in 40 colon tumor samples and 24 lung tumors. They found that 53 percent of colon tumors and 71 percent of lung tumors had mutations that may be attacked with cancer medicines on the market or in human trials, according to the study published today in Nature Medicine. In some cases, the results revealed what drugs wouldn’t work against the tumors.

The study from researchers at Foundation Medicine and the Dana-Farber Cancer Institute in Boston, shows the value of using DNA sequencing machines to optimize treatment by matching drugs against specific gene abnormalities inside a patient’s tumor, said Pasi Janne, a study co-author.

“It is moving closer and closer to real personalized medicine,” Janne, a lung cancer specialist at Dana-Farber, said in an interview. “It is fantastic as we can tailor our therapy to the particular genetics of a patient’s cancer.”

The DNA sequencing field has drawn increased interest from pharmaceutical makers focused on developing gene-targeted therapies. Roche Holding AG, the world’s biggest maker of cancer medicines, last month began a $5.7 billion hostile takeover offer for Illumina Inc., the maker of gene sequencing machines that Foundation Medicine uses in its tests.

Pfizer’s Sutent

The researchers also spotted a previously unknown genetic flaw in 2 percent of 561 lung tumors tested. The flaw activates a growth-boosting protein targeted by Pfizer Inc.’s kidney- cancer drug Sutent, hinting that the treatment from the New York-based drugmaker may also work in these lung patients, said Janne. He wants to begin a trial of Sutent in lung-cancer patients with the gene change by year end, he said.

Researchers in Japan also reported finding the same new genetic change in a fraction of lung tumors, according to two other studies published today in Nature Medicine. Until the three new studies, the genetic change had never been seen in any cancer, said Janne.

The change fuses two unrelated genes together to form KIF5B-RET, turning on a growth-driving protein called RET that is usually not active in lung cells. When Janne and his collaborators treated cells with the aberrant gene using Pfizer’s Sutent or AstraZeneca Plc’s thyroid-cancer drug Caprelsa, the cells died. Both drugs block RET.

Finding Gene Abnormalities

Maureen Cronin, a study co-author and molecular pharmacologist at Cambridge, Massachusetts-based Foundation Medicine, said her company was finding new gene abnormalities at a much higher rate than they expected as it performs DNA scans on tumors.

“We expected to find new things, but not at the frequency we are finding them,” she said in a telephone interview. The results “are very surprising.”

The study also suggests cancer researchers may need to rethink the way they classify and treat the disease, Cronin said. The particular genetic abnormality inside tumor DNA may matter as much as what organ the tumor came from, she said.

Pfizer is aware of the new lung cancer gene finding and “believes the data are interesting,” said Jenifer Antonacci, a company spokeswoman, in an e-mail.

Laura Woodin, a spokeswoman for London-based AstraZeneca, said the company “is constantly alert to new developments and research in the science of oncology and we review relevant, peer reviewed studies for what they might mean for patients and drug development.”

Foundation Medicine performs a $5,800 test that takes tumor samples and sequences DNA from 200 genes relevant to cancer. It is funded with $33.5 million in venture capital from Third Rock Ventures, Kleiner Perkins Caufield & Byers and Google Ventures, according to its website.

--Editors: Angela Zimm, Andrew Pollack

To contact the reporter on this story: Robert Langreth in New York at rlangreth@bloomberg.net;

To contact the editor responsible for this story: Reg Gale at rgale5@bloomberg.net

See the original post:
High-Speed DNA Scans Help Most Lung Cancer Patients, Study Finds

Posted in DNA

Heathwood Hall planting seeds of change

It may be early February, but 10th-grade biology students at Heathwood Hall Episcopal School already have their hands in the dirt, planting trays of dill and peppers that will be ready in early spring.

“Believe it or not guys,” says science teacher, Jim Morris “together you’ve planted almost 100 seed trays.”

Students file out of the classroom and take a spiral staircase down to the school’s Robert Clark Greenhouse, where they will be filling more plastic trays with dirt and making tiny indentations in the soil — all part of the effort to get ready for Heathwood Hall’s April 12 spring plant sale.

Both the sale and the greenhouse lessons are part of a larger “green” initiative at the private school, called School Environmental Education, or SEED.

“The school has always had a deep commitment to environmental education,” said Morris, SEED’s co-director. “But it’s been each individual teacher doing their own project. SEED was created to be an umbrella group to pull all of these activities together.”

Launched last spring, the initiative uses a multipronged approach to coordinate what had become a long list of green projects or ecologically-minded programs, a focus for the school founded in 1951.

A team of 25 — including faculty, administration, student council officers and parents — representing seven subcommittees helps direct the program’s goals and ensure there aren’t redundancies.

“We operate on the premise that everyone takes ownership,” Morris said. “So it’s a bottom-up approach rather than a top-down approach.”

Projects have included conventional green programs, such as community cleanups, compost bins and vegetable and shade gardens. But the SEED team also has employed the unconventional, marrying environmental initiatives with other school programs.

“A huge number of people here have a classic land ethic to protect the environment,” Morris said. “So we have always looked for opportunities to tie all of our programs in together with environmental science.”

Case in point: The spring plant sale not only serves as a lesson in photosynthesis and seed germination — something biology students were studying recently — but also raises funds for those same students to take part in their senior trip to rehabilitate homes on Johns Island in South Carolina’s Lowcountry. The money raised from the sale will go toward paint and building materials.

Biology Buddies, which pairs preschoolers with high school students, is another example of a Heathwood program doing double, even triple, duty.

“Little kids can play in the dirt till the cows come home,” Morris said. “But older kids will get bored after awhile. So we’ve found the combination, with older and younger students together, works well. It’s very productive.”

The kids, Morris said, not only receive a science lesson but gain important socialization skills in the process. It’s a holistic approach that’s become a hallmark of how the school approaches education.

“We do that in various forms here,” Morris said.

The approach seems to be working.

Sophomore Thomas Smith said he didn’t think he would enjoy biology class. The 15-year-old, who tends to lean more toward history and English as his favorite subjects, said he’s since changed his mind.

“I’ve gotten into medicinal plants,” he said. “Like herbal remedies. So this (class) has got me interested in that.”

While Morris and Todd Beasley, the program’s other director, say some of the initiative’s goals may be lofty, ultimately they may prove beneficial to the community as well.

“Jim and I always like to think big,” said Beasley, who teaches fifth-grade science. “So we sometimes have to remind ourselves this has only been the first year.”

In addition to encouraging students to take behaviors such as recycling and planting gardens home to their families, the program helps students rediscover the world around them, Beasley said.

“It’s this idea more or less of a ‘green hour’ to get them outside for an hour,” he said. “One of our goals is to not necessarily say ‘you need to put down the video game’ but just get them thinking about other ways of entertaining themselves and get them reconnected to the outdoors.”

Read more:
Heathwood Hall planting seeds of change

Roche Supports the Smithsonian's National Zoo with Next-Generation Sequencing Instrument for Animal Conservation …

BRANFORD, Connecticut, February 8, 2012 /PRNewswire/ --

Roche and the Smithsonian Conservation Biology Institute in Washington, DC announced today a collaboration agreement to use Roche's GS Junior benchtop sequencing system for research in SCBI's Center for Conservation and Evolutionary Genetics. SCBI's state-of-the-art genetics laboratory, based at the National Zoo in Washington, DC, will house the next-generation sequencing instrument and will use its deep DNA sequencing powers for a variety of research projects in areas of animal disease resistance, population genetics and molecular ecology.

The Smithsonian Conservation Biology Institute plays a key role in the Smithsonian's global efforts to understand and conserve species and train future generations of conservationists, while specializing in areas of animal ecology, management, health and breeding. Researchers at SCBI plan to use the GS Junior System's DNA sequencing technology to gain deeper insight into the genetics of dangerous pathogens that threaten animal species. Specific projects include:

Sequencing strains of the deadly amphibian chytrid fungus that has devastated amphibian populations worldwide. Sequencing highly pathogenic strains of the elephant endotheliotropic herpes virus (EEHV1). Sequencing invasive avian malaria strains that are devastating most species of native Hawaiian birds.

"The power of next-generation sequencing is remarkable," said Rob Fleischer, head of SCBI's Center for Conservation and Evolutionary Genetics. "We are thrilled to work with Roche to bring the GS Junior System into our laboratory. The system is perfectly sized for our research and the long read lengths are critical to our particular areas of focus in pathogen detection and viral/bacterial comparative genomics."

"We are honored to support the Smithsonian Institution and the National Zoo's animal conservation projects, which are vital to the future health of our planet," said Thomas Schinecker, President of 454 Life Sciences, a Roche Company. "This collaboration demonstrates the tremendous potential of our sequencing technology to broaden understanding of all species on earth - from humans to plants and animals."

About Roche

Headquartered in Basel, Switzerland, Roche is a leader in research-focused healthcare with combined strengths in pharmaceuticals and diagnostics. Roche is the world's largest biotech company with truly differentiated medicines in oncology, virology, inflammation, metabolism and CNS. Roche is also the world leader in in-vitro diagnostics, tissue-based cancer diagnostics and a pioneer in diabetes management. Roche's personalized healthcare strategy aims at providing medicines and diagnostic tools that enable tangible improvements in the health, quality of life and survival of patients. In 2011, Roche had over 80,000 employees worldwide and invested over 8 billion Swiss francs in R&D. The Group posted sales of 42.5 billion Swiss francs. Genentech, United States, is a wholly owned member of the Roche Group. Roche has a majority stake in Chugai Pharmaceutical, Japan. For more information: http://www.roche.com.

Smithsonian Conservation Biology Institute, Center for Conservation and Evolutionary Genetics

The Smithsonian Conservation Biology Institute plays a key role in the Smithsonian's global efforts to understand and conserve species and train future generations of conservationists. Headquartered in Front Royal, Va., SCBI facilitates and promotes research programs based at Front Royal, the National Zoo in Washington, D.C., and at field research stations and training sites worldwide.

For life science research only. Not for use in diagnostic procedures.

454, 454 LIFE SCIENCES, 454 SEQUENCING, and GS FLX are trademarks of Roche.

All other product names and trademarks are the property of their respective owners.

For further information please contact:

Roche Diagnostics 454 Life Sciences Corporation, a Roche Company

Dr. Burkhard Ziebolz
Phone: +49-8856-604830
Email: burkhard.ziebolz@roche.com

Katie Montgomery
Phone: +1-203-871-2300
Email: katie.montgomery@roche.com
Smithsonian Conservation Biology Institute

Lindsay Renick Mayer
Phone : +1-202-633-3081
Email: RenickMayerL@si.edu

Original post:
Roche Supports the Smithsonian's National Zoo with Next-Generation Sequencing Instrument for Animal Conservation ...

Finally an answer: Why do zebras have stripes?

Science - Biology

Page 1 of 2

A study published in the Journal of Experimental Biology answers the question as to why zebras have stripes. The answer by these Hungarian and Swedish researchers may surprise you but, at least, it is a step in the right direction to answer the pressing question: Why do zebras have stripes?

The paper in the Journal of Experimental Biology is called “Polarotactic tabanids find striped patterns with brightness and/or polarization modulation least attractive: an advantage of zebra stripes.”

It was authored by:

•    Ádám Egri, Miklós Blahó, and Gábor Horváth (all three from the Environmental Optics Laboratory, Department of Biological Physics, Physical Institute, Eötvös University, Budapest, Hungary);
•    György Kriska (from the Group for Methodology in Biology Teaching, Biological Institute, Eötvös University, Budapest, Hungary);
•    Róbert Farkas and Mónika Gyurkovszky (both from the Department of Parasitology and Zoology, Faculty of Veterinary Science, Szent István University, Budapest, Hungary);
•    Susanne Åkesson (from the Department of Biology, Centre for Animal Movement Research, Lund University, Ecology Building, Lund, Sweden).

 

They state from within their paper: “The characteristic striped appearance of zebras has provoked much speculation about its function and why the pattern has evolved, but experimental evidence is scarce.”

And, they conclude (Here comes the answer!): “… we demonstrate that a zebra-striped horse model attracts far fewer horseflies (tabanids) than either homogeneous black, brown, grey or white equivalents.”

So, the stripes help to confuse horseflies, that is, they would rather bite other animals than striped zebras.

Is that the end of the story? Check out page two to find out.

Read the rest here:
Finally an answer: Why do zebras have stripes?

AP Biology Students Create Mobiles and Water Molecules

   Two HHS AP biology classes have had two interesting projects recently. The projects consisted of making a mobile and a water molecule.

AP science lead teacher  Patti Meeks  assigned the projects to her students, and she also gave her students specific guidelines to follow.

  The first project was to make A Mobile Without A Spine.  Students had to choose ten invertebrates from a list, each from a different phylum or category.  Once the students chose their ten invertebrates, they had to research to find information about each organism.

Mrs. Meeks gave students instructions to find each invertebrate's binomial name, classification of kingdom, phylum, class, order and family.

The teacher also told students to find specific anatomical, embryological, and symmetrical features present in the organism that qualify it for inclusion in its taxon. Students were also instructed to include one fun fact about each invertebrate.

The second project that AP biblogy students had to create was a water molecule.  Class members were given the instructions to build a 3-D water molecule out of household products. Other information that had to be included with the water molecule was to include all atoms and to put the atoms in the correct location.

 Students also had to include a key that explained the various features and to list the water's properties. Mrs. Meeks also told her students to make sure to model water's polarity.

Many students enjoyed the AP biology projects. Junior Hernan Mondragon stated,  "You learn a lot of stuff doing the research." Another student, Scott Borgognoni,  stated, "The projects were very interesting and easy."

 

The following are comments from the readers. In no way do they represent the view of ashleycountyledger.com.

You must register with a valid email to post comments. Only your Member ID will be posted with the comments.

Registered users sign in here: Become a Registered User

The rest is here:
AP Biology Students Create Mobiles and Water Molecules

Grain gains from soil biology research

THE science of soil biology is following on the heels of minimum till farming - hailed as the next productivity revolution and a potential source of widespread gains in the cropping sector.

The Grains Research and Development Corporation (GRDC) is supporting soil biology research with a major investment in the second GRDC Soil Biology Initiative (SBI-II).

The Initiative and its suite of projects is coordinated by Associate Professor Pauline Mele, Department of Primary Industries Victoria (DPI) and Latrobe University principal research scientist, under the leadership of GRDC manager agronomy, soils and environment, Dr Martin Blumenthal.

A/Prof Mele says the SBI-II will enhance productivity growth in the cropping sector, particularly the high rainfall zone (HRZ), by improving knowledge on a region-by-region basis as to how the quality of soil biology relates to grain productivity and productivity.

"We hope to improve understanding of the role of soil biological communities in crop nutrient availability, suppressive soils, and general soil health," A/Prof Mele said.

"For example, we have a range of projects that will give us greater insight into the role of free-living nitrogen-fixing bacteria in crop nutrition.

"We already know that the amount produced will vary from between 10 and 30 kilograms per hectare per year but we don't have in-crop measures and have yet to link how stubble from previous years influences this rate."

A/Prof Mele says the SBI will provide also agronomic management solutions that encourage desirable biological processes and/or suppress undesirable processes.

"We understand that some soils are more able to resist diseases such as bare patch in wheat," she says.

"We also know that the phenomenon is related to soil biology as previous work has shown that if you sterilise the soil and remove the biology, disease strikes with a vengeance.

"The nature of this 'suppressiveness' is largely a mystery so this initiative is looking more deeply into the soil biology to see who is providing the defence and by what means."

Ultimately the hope is to relate these beneficial defence traits to crop management that encourages the development of a disease suppressive soil community.

"It is also building a research capacity in soil biology research, development and extension through national and international integration of science disciplines including genetics, bioinformatics, modelling, geochemistry, agronomy and pathology," A/Prof Mele says.

The SBI-II is underpinned by three key themes:

1. Monitoring soil quality for better decision making;

2. Management systems for enhanced nutrient availability (incorporating rhizosphere); and

3. Suppressive soils: traits and transferability.

In a season when waterlogging has been common across the HRZ, soil health is a hot topic for southern growers.

Under the SBI, GRDC is supporting the national roll-out of a soil quality project initiated in WA (visit http://www.soilhealth.org .au), which brings together tools and information for growers and advisers, including fact sheets on waterlogging, raised beds and non-wetting soils.

Read the original post:
Grain gains from soil biology research

Hope For Early Alzheimer’s Test In Spinal Fluid

Featured Article
Academic Journal
Main Category: Alzheimer's / Dementia
Also Included In: Genetics;  Biology / Biochemistry
Article Date: 12 Feb 2012 - 0:00 PST

email to a friend   printer friendly   opinions  

Current Article Ratings:

Patient / Public: Healthcare Prof:

3 (1 votes)

New research led by Nottingham University in the UK suggests abnormal levels of seven proteins in spinal fluid could be markers for the early stages of Alzheimer's disease, raising hopes of a test for a disease that is difficult to diagnose at the beginning. The researchers write about their findings in the Journal of Alzheimer's Disease.

Study co-author Dr Kevin Morgan, professor of Human Genomics and Molecular Genetics at Nottingham, told the press on Tuesday that the findings are "a new lead for improving early diagnosis of Alzheimer's disease".

An early diagnosis of Alzheimer's disease would help people prepare for the future and also enable them to be involved in clinical trials at a much earlier stage of the disease, when treatments are more likely to show positive results, he added.

About 820,000 people in the UK have dementia, of which Alzheimer's disease is the most common form. Dementia often develops slowly and is not always obvious in the early stages. It can be difficult to distinguish from the mild forgetfulness often seen in normal ageing.

Morgan and colleagues compared samples of cerebrospinal fluid (CSF) from 33 people with Alzheimer's disease, 10 people with mild cognitive impairment, and 20 healthy older people. Mild cognitive impairment is a condition where people have problems with thinking and memory but not to an extent that it interferes with everyday life.

They compiled profiles of the proteins in each sample and then compared them with each other to see if they could find something distinctive in the samples from people with Alzheimer's disease.

The results showed that the samples from people with Alzheimer's diseases tended to have higher levels of four proteins, and lower levels of three other proteins.

A protein called SPARCL1 proved to be the strongest predictor for Alzheimer's. When the researchers tested the samples using only this protein, they could tell whether a person had Alzheimer's disease to an accuracy of 65%.

This accuracy went up to 95% when they tested for abnormal levels of all seven proteins.

The researchers repeated the tests with a new set of CSF samples from 32 healthy people and 30 people with Alzheimer's disease. This time, when they tested for all seven proteins, the accuracy was 85%.

The team now plans to use their findings to develop a blood test for an early diagnosis of Alzheimer's disease.

Morgan said:

"It will also be important to investigate what causes these specific proteins to change as Alzheimer's develops."

By understanding the underlying changes in the biochemistry of Alzheimer's, we have a better chance of developing new treatments, he said, adding that:

"Dementia can only be defeated through research, and I hope these findings could take us a step closer to that goal."

Dr Marie Janson, Director of Development at Alzheimer's Research UK, who part-funded the study, said the findings have "opened up a new avenue for research".

She emphasized how difficult it is to diagnose Alzheimer's, as memory problems can be symptomatic of various conditions.

"This study has the potential to help create a vital tool for doctors to identify patients that need further investigation - but these results must now be followed up in order to achieve that goal," she added.

Funds from the Big Lottery Fund and the EU FP6 Program through BIOPATTERN also supported the work.

Written by Catharine Paddock PhD
Copyright: Medical News Today
Not to be reproduced without permission of Medical News Today

Visit our alzheimer's / dementia section for the latest news on this subject. "Identification of SPARC-like 1 Protein as Part of a Biomarker Panel for Alzheimer's Disease in Cerebrospinal Fluid"; Baharak Vafadar-Isfahani, Graham Ball, Clare Coveney, Christophe Lemetre, David Boocock, Lennart Minthon, Oskar Hansson, Amanda Kathleen Miles, Sabina M Janciauskiene, Donald Warden, A. David Smith, Gordon Wilcock, Noor Kalsheker, Robert Rees, Balwir Matharoo-Ball and Kevin Morgan; Journal of Alzheimer's Disease Volume 28, Number 3, pp 625-636, 2012; DOI: 10.3233/JAD-2011-111505; Link to Abstract.
Additional source: Alzheimer's Research UK Please use one of the following formats to cite this article in your essay, paper or report:

MLA

Catharine Paddock PhD. "Hope For Early Alzheimer's Test In Spinal Fluid." Medical News Today. MediLexicon, Intl., 12 Feb. 2012. Web.
12 Feb. 2012. <http://www.medicalnewstoday.com/articles/241537.php&gt;

APA

Please note: If no author information is provided, the source is cited instead.


Rate this article:
(Hover over the stars then click to rate) Patient / Public:
or Health Professional:

Please note that we publish your name, but we do not publish your email address. It is only used to let you know when your message is published. We do not use it for any other purpose. Please see our privacy policy for more information.

If you write about specific medications or operations, please do not name health care professionals by name.

All opinions are moderated before being included (to stop spam)

Contact Our News Editors

For any corrections of factual information, or to contact the editors please use our feedback form.

Please send any medical news or health news press releases to:

Note: Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a health care professional. For more information, please read our terms and conditions.


See the original post here:
Hope For Early Alzheimer's Test In Spinal Fluid

Forest Park’s Braunecker headed to Harvard

Ben Braunecker leapt at the chance to play football and study biochemistry at Harvard University.

"I think Harvard is at the top," said Braunecker, a Forest Park High School senior who signed papers committing to the Crimson on Thursday. Ivy League schools do not give athletic scholarships, but Braunecker is receiving academic aid.

"They won the Ivy League championship and have great athletics. They are also one of the most prestigious universities overall in the U.S. and the world."

Ben Braunecker

Braunecker turned down a full athletic scholarship from Southern Illinois University.

"Obviously going to school for free and playing football did spark my interest," said Braunecker, who was also recruited by Columbia, among others. "But I rely on the '4 and 40 rule.' You're only playing football for four years and ultimately you have to decide what you're going to do for the next 40."

Braunecker, a 6-foot-4, 215-pounder who is a straight-A student and class valedictorian, caught 27 passes for 644 yards, a 23.9 average, including seven touchdowns, in earning the Courier & Press All-Southwestern

Indiana Player of the Year honors. He was the Pocket Athletic Conference Most Valuable Player and named honorable mention all-state.

Braunecker averaged 34 yards per kick return, including two touchdowns, and 36.5 yards on four punt returns. Braunecker also had three interceptions playing defensive back.

Harvard is looking at him as a "hybrid," a combination of split end and tight end.

Braunecker, who also plays basketball and is a member of Forest Park's track and field team, will improve as he specializes in one sport, said Rangers football coach Terry Wagner.

"He'll have time to reach his full potential," Wagner said. "For us, he never came off the field. They want him to put on 15 more pounds and develop into an even better player."

Wagner said Braunecker was looking for a challenge.

"Academics is very important in his life," Wagner said. "He realizes that school comes first and it's a school that is rich in tradition and he got caught up in all that."

Read the rest here:
Forest Park's Braunecker headed to Harvard

News digest: MathAcrossCampus Friday, Honor: Charles Peck and Chrysan Gallucci, English language courses

Feb. 9, 2012

Biochemistry prof showcases applications of math Friday in MathAcrossCampus
Tomorrow the MathAcrossCampus lecture series presents David Baker, a UW biochemistry professor, in an interdisciplinary public talk titled “Computing Proteins.” Baker will describe research looking at why proteins, which could take on a vast number of possible configurations, fold to single unique structures that allow them to carry out their functions. He will describe his efforts to predict these structures in the lab, through the distributed computing project Rosetta@Home, and with the online game Foldit, as well as research on designing new proteins to address 21st-century challenges.

The lecture will be Friday, Feb. 10, from 2:30 p.m. to 3:30 p.m. in Kane Hall 210. MathAcrossCampus showcases applications of mathematics, with a special emphasis on the growing role of discrete methods in math applications.

Charles Peck’s teacher-education article honored
Change is hard, in teacher education programs as in all things. If new regulations and state mandates are viewed as undercutting a program’s local control, this can weaken the very staff motivation needed to implement changes.

This dampening effect may be lessened if the focus of reforms is shifted from top-down compliance to collective inquiry, local knowledge is valued and changes are seen as opportunities to clarify and improve the program.

That’s according to finding of a December 2010 research paper by Charles Peck, a UW professor of education, and colleagues that has been named outstanding “Journal of Teacher Education” article by the American Association of Colleges for Teacher Education. Peck’s co-authors are Chrysan Gallucci, UW professor of education, and Tine Sloan of the University of California, Santa Barbara.

The researchers studied a teacher education program in the University of California system for 18 months as program leaders considered implementation of new legislation creating a two-tier credential system and new state standards for teacher preparation.

Reviewers said Peck and co-authors “constructed a rich, descriptive account of the events and the impacts of the policy implementations as they unfolded in a local context,” adding that “the authors’ stance of inquiry, rather than compliance, provided the field with a portrait of how systematic, programmatic research can greatly benefit the educator preparation profession.”

The award will be presented at the association’s annual conference, Feb. 17-19, in Chicago.

Online, on-site English language courses for UW employees
The UW International & English Language Programs offers quarterly online and on-site courses for those who are primarily non-native speakers of English.

Online courses are available for those who want to improve their grammar and vocabulary in academic, business or technical writing.  All of the courses have weekly interactive exercises and short assignments. Instructors respond to assignments within two business days.

Evening on-site courses focus on improving conversational skills and preparation for the English tests through organizations such as Test of English as a Foreign Language or International English Language Testing System. There are also daytime courses in reading, writing, grammar, speaking, listening, and vocabulary and idioms.

UW International & English Language Programs can customize courses for non-native speakers in the workplace. For example, courses can be designed for such areas as pronunciation and fluency, assisting clients by telephone, presentation skills and the language of meetings, e-mail communication and job-specific communications.

For more information, call 543-6242 or e-mail uwelp@u.washington.edu.

Please enable JavaScript to view the comments powered by Disqus.blog comments powered by

Link:
News digest: MathAcrossCampus Friday, Honor: Charles Peck and Chrysan Gallucci, English language courses

No entry without protein recycling: RUB researchers discover new coherence in enzyme transport

Public release date: 10-Feb-2012
[ | E-mail | Share ]

Contact: Dr. Ralf Erdmann
Ralf.Erdmann@rub.de
49-234-322-4943
Ruhr-University Bochum

The group of Prof. Dr. Ralf Erdmann at the Ruhr-Universit?t Bochum (Faculty of Medicine, Department of Systems Biochemistry) discovered a connection of peroxisomal protein import and receptor export. In the Journal of Biological Chemistry, they disclosed that enzymes only get imported into certain cell organelles (peroxisomes) upon coupling of their import to the recycling of their transport protein (receptor).

Multi-functional tool peroxisome

Peroxisomes do not have their own DNA. Thus, all peroxisomal proteins are coded within the nucleus and imported into the peroxisome after their synthesis is completed. The Erdmann lab investigates this process in detail. Peroxisomes contain more than 50 various enzymes in total which e.g. decompose fatty acids and dispose hydrogen peroxide or plasmalogens, the main phospholipid of the white matter of the brain. A disruption of their function does not only cause severe metabolic disorders, it can even lead to death of newborns.

Export signal controls recycling

Dynamic receptors recognize and escort the enzymes destined for the peroxisome to the organelle where they attach to the membrane. Then the receptor-enzyme complex disassembles and the enzyme is transported across the peroxisomal membrane. Afterwards, the receptor is transported from the membrane back to the cytosol. This recycling is controlled by the attachment of the small protein ubiquitin to the receptor, which functions as an export signal.

Modification as a safety barrier

The team of Prof. Dr. Ralf Erdmann studied a certain peroxisomal receptor, which consists of a targeting unit (Pex18p) and an enzyme-binding unit (Pex7p). The scientists discovered that ubiquitin modifies Pex18p in order to enable the receptor to return to the intracellular liquid. Only when the targeting unit of the receptor is exported from the membrane, the import of the cargo-loaded enzyme-binding unit takes place. This result supports the export-driven-import model, previously proposed by the Erdmann group.

###

Bibliographic record

A. Hensel, S. Beck, F. El Magraoui, H.W. Platta, W. Girzalsky, R. Erdmann (2011): Cysteine-dependent ubiquitination of Pex18p is linked to cargo translocation across the peroxisomal membrane, Journal of Biological Chemistry, doi: 10.1074/jbc.M111.286104

W. Schliebs, W. Girzalsky, R. Erdmann (2010): Peroxisomal protein import and ERAD: variations on a common theme, Nature Reviews Molecular Cell Biology, doi: 10.1038/nrm3008

Further information

Prof. Dr. Ralf Erdmann, Department of Biochemistry Systems, Faculty of Medicine of the Ruhr-Universit?t Bochum, 44780 Bochum, Germany, Phone: +49/234/32-24943 Ralf.Erdmann@rub.de

Click for more

Department of Biochemistry Systems
http://www.ruhr-uni-bochum.de/physiolchem/system/index.html.en

Previous press information on the topic
http://aktuell.ruhr-uni-bochum.de/pm2011/pm00233.html.en

Figure online

A figure related to this press release can be found at http://aktuell.ruhr-uni-bochum.de/pm2012/pm00024.html.en

Editor

Marie-Astrid Reinartz

[ | E-mail | Share ]

 

AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.

Read the rest here:
No entry without protein recycling: RUB researchers discover new coherence in enzyme transport

Good Timing: NIST/CU Collaboration Adds Timing Capability To Living Cell Sensors

Individual cells modified to act as sensors using fluorescence are already useful tools in biochemistry, but now they can add good timing to their resumé, thanks in part to expertise from the National Institute of Standards and Technology (NIST).

With the added capability to track the timing of dynamic biochemical reactions, cell sensors become more useful for many studies, such as measurements of protein folding or neural activity.

As described in the Journal of the American Chemical Society,* a NIST biophysicist working at JILA and a collaborator at the University of Colorado Boulder (CU) developed a microfluidic system that records biochemical reactions over a time span of milliseconds to seconds in living human cells modified to act as FRET (fluorescence resonance energy transfer) sensors.

The fast, flexible system uses lasers to measure sensor signals at two points in time at a rate of up to 15 cells per second. Statistical data, such as the average value of the FRET response for thousands of cells, can be collected in minutes.

"Our system is the first one that measures FRET response times at the single-cell level, while at the same time measuring over many cells," says JILA Fellow Ralph Jimenez, whose research group built the optics, microfluidics, electronics and other hardware.

JILA is a joint institute of NIST and CU. Jimenez is collaborating with Amy Palmer, an assistant professor in CU's Department of Chemistry and Biochemistry, who handled the molecular design and cell-biology aspects of the project.

The FRET technique relies on reactions that occur between large biological molecules in close proximity to each other. One molecule absorbs light energy from a laser and transfers this energy to the nearby acceptor molecule. The acceptor molecule then releases this energy as light (fluorescence) at a characteristic wavelength that is different from the original laser light. Measurements of this fluorescence indicate the extent of the energy transfer. FRET can be used to study many types of cellular processes. In these experiments, the researchers were interested in the type and concentration of metal ions within cells, which can affect important cell processes. The JILA/CU experiments used cells genetically modified to take up particular metal ions and signal changes in their concentrations by altering the FRET signals.

The researchers made a microfluidic device with a flow-control valve system that mixes cells and metal-containing chemicals in just a few milliseconds. The cells then pass single file through two blue laser beams that excite the FRET fluorescence signal at different locations in the device. With precise flow control and flexible device design, cell travel time between the two locations can be varied from 1 millisecond to 10 seconds. Scientists measure the FRET signal changes within individual cells between the two locations.

"FRET is an important measurement technique used in bio-imaging, so it's great that NIST could begin to contribute to measurements of the fidelity of FRET-based sensors," Jimenez says. "We have a lot more work planned for the future with this instrument."

The project is part of the research team's effort to develop cell sensors with improved optical, physical and chemical properties and to enable detection of very faint signals in living cells. The work was supported in part by a CU-NIST seed grant, the National Institutes of Health and the National Science Foundation.

* H. Ma, E.A. Gibson, P.J. Dittmer, R. Jimenez and A.E. Palmer. High-throughput examination of FRET-detected metal-ion response in mammalian cells. Journal of the American Chemical Society (JACS). Published online Jan. 19, 2012. (Communication) DOI: 10.1021/ja2101592.

SOURCE: National Institute of Standards and Technology

See the rest here:
Good Timing: NIST/CU Collaboration Adds Timing Capability To Living Cell Sensors

700 students participate in Kentucky American Water Science Fair

Approximately 700 public, private and home school students in grades four through 12 participated today in the 28th annual Kentucky American Water Science Fair coordinated by Fayette County Public Schools at Bryan Station High School in Lexington.

The event included students’ science fair projects judged by 150 professionals, as well as hands-on, educational exhibits and demonstrations coordinated by Bluegrass PRIDE.

A total of 143 student projects received awards.

Six students received special recognition from Kentucky American Water for demonstrating achievement in water science projects, and four students received the Urban Environmental Award, which recognizes outstanding projects related to environmental stewardship.

Alltech sponsored special awards in animal sciences and Lexmark International provided Lexmark printers to first-place engineering award recipients.

Lexington Mayor Jim Gray joined Kentucky American Water President Cheryl Norton and Fayette County Public Schools representatives Jack Hayes, Mike McKenzie and Ketsy Fields in the award presentations.

Judges evaluated the student projects according to the following categories: animal sciences, behavioral and social sciences, biochemistry, cellular and molecular biology, chemistry, computer science, earth and planetary science, engineering, energy and transportation, environmental sciences, medicine and health sciences, microbiology, physics and astronomy and plant sciences.

Kentucky American Water initiated the science fair for junior high school students in 1985 as part of the company’s centennial celebration. The next year, the company joined with Fayette County Public Schools in coordinating the event. The fair has been expanded twice: first in 1989 to include elementary school science projects, and again in 1991 to include high school projects.

During her remarks, Norton congratulated students for their achievements in science, and thanked parents for supporting science, math and technology education.

Norton started her career in the water utility industry nearly 25 years ago before she graduated from college through a part-time research position at the national laboratory of Kentucky American Water’s parent company, American Water, located outside St. Louis. After graduating from college she joined the lab full time, conducting a variety of national research studies on drinking water issues, and eventually moved into management positions that culminated in her leading the facility. She joined Kentucky American Water as president in January 2011.

Students who received awards at today’s competition advance to the Central Kentucky Regional Science and Engineering Fair to be held at the University of Kentucky on Saturday, March 3.

Kentucky American Water also serves as a leading sponsor for that event.

Original post:
700 students participate in Kentucky American Water Science Fair