MEDIA CONTACT
Available for logged-in reporters only
Proceedings of the National Academy of Sciences (PNAS)
Newswise Irvine, Calif. September 30, 2019 Common herbs, including lavender, fennel and chamomile, have a long history of use as folk medicines used to lower blood pressure. In a new study, University of California, Irvine researchers explain the molecular mechanisms that make them work.
Published today in Proceedings of the National Academy of Sciences (PNAS), the study illustrates how many of the known traditional botanical plants used to lower blood pressure activate a specific potassium channel (KCNQ5) in blood vessels. KCNQ5, together with other potassium channels including KCNQ1 and KCNQ4, is expressed in vascular smooth muscle. When activated, KCNQ5 relaxes blood vessels, making it a logical mechanism for at least part of the hypotensive actions of certain botanical folk medicines.
We found KCNQ5 activation to be a unifying molecular mechanism shared by a diverse range of botanical hypotensive folk medicines. Lavandula angustifolia, commonly called lavender, was among those we studied. We discovered it to be among the most efficacious KCNQ5 potassium channel activators, along with fennel seed extract and chamomile, said Geoff Abbott, PhD, professor of physiology and biophysics at the UCI School of Medicine and senior investigator on the study.
Interestingly, the KCNQ5-selective potassium channel activation feature found in the botanicals is lacking in the modern synthetic pharmacopeia. Until now, it seems to have eluded conventional screening methods utilizing chemical libraries, which may account for why it is not a recognized feature of synthetic blood pressure medications.
Our discovery of these botanical KCNQ5-selective potassium channel openers may enable development of future targeted therapies for diseases including hypertension and KCNQ5 loss-of-function encephalopathy, said Abbott.
Documented use of botanical folk medicines stretches back as far as recorded human history. There is DNA evidence, dating back 48,000 years, that suggests the consumption of plants for medicinal use by Homo neanderthalensis. Archaeological evidence, dating back 800,000 years, even suggests non-food usage of plants by Homo erectus or similar species. Today, evidence of the efficacy of botanical folk medicines ranges from anecdotal to clinical trials, however the underlying molecular mechanisms often remain elusive.
This study was supported by the National Institutes of Health, National Institute of General Medical Sciences and the National Institute of Neurological Disorders and Stroke. Also involved in the study were UCIs Ran Manville, PhD, PhD student Kaitlyn Redford and Benjamin Katz, PhD, and from the University of Copenhagen, Denmark, PhD student Jennifer van der Horst and Thomas Jepps, PhD.
About the UCI School of Medicine: Each year, the UCI School of Medicine educates more than 400 medical students, as well as 200 doctoral and masters students. More than 600 residents and fellows are trained at UC Irvine Medical Center and affiliated institutions. The School of Medicine offers an MD; a dual MD/PhD medical scientist training program; and PhDs and masters degrees in anatomy and neurobiology, biomedical sciences, genetic counseling, epidemiology, environmental health sciences, pathology, pharmacology, physiology and biophysics, and translational sciences. Medical students also may pursue an MD/MBA, an MD/masters in public health, or an MD/masters degree through one of three mission-based programs: the Health Education to Advance Leaders in Integrative Medicine (HEAL-IM), the Leadership Education to Advance Diversity-African, Black and Caribbean (LEAD-ABC), and the Program in Medical Education for the Latino Community (PRIME-LC). The UCI School of Medicine is accredited by the Liaison Committee on Medical Accreditation and ranks among the top 50 nationwide for research. For more information, visit som.uci.edu.
Go here to read the rest:
- Yes, But. The Annotated Atlantic. - November 7th, 2009 [November 7th, 2009]
- Health Insurance Benefit Costs by Region - November 8th, 2009 [November 8th, 2009]
- For an Operator, Please Press... - November 8th, 2009 [November 8th, 2009]
- Pollyanna With a Pen: Maine Governor Signs 18 New Health Care Bills into Law - November 8th, 2009 [November 8th, 2009]
- AMA Sounds the Alarm, Medicare Making Yet Another Attempt to Cut Reimbursement - November 8th, 2009 [November 8th, 2009]
- Mass Governor Asks Blue Cross to Keep Higher Employer Contribution - November 8th, 2009 [November 8th, 2009]
- Lifespan and Care New England Plan Monopoly (Again) - November 8th, 2009 [November 8th, 2009]
- Dirigo Health: Con Artists, Liars, and Thieves? - November 8th, 2009 [November 8th, 2009]
- New Orleans: Health Challenges - November 8th, 2009 [November 8th, 2009]
- August a Flurry of Activity - November 8th, 2009 [November 8th, 2009]
- Maine's Dirigo Health Savings One-Third of Original Estimate - November 8th, 2009 [November 8th, 2009]
- “Methodolatry”: My new favorite term for one of the shortcomings of evidence-based medicine - November 8th, 2009 [November 8th, 2009]
- Suzanne Somers’ Knockout: Dangerous misinformation about cancer (part 1) - November 8th, 2009 [November 8th, 2009]
- A science-based blog about GMO - November 8th, 2009 [November 8th, 2009]
- A Not-So-Split Decision - November 8th, 2009 [November 8th, 2009]
- Military Medicine in Iraq - November 8th, 2009 [November 8th, 2009]
- The effective wordsmithing of Amy Wallace - November 8th, 2009 [November 8th, 2009]
- A Science Lesson from a Homeopath and Behavioral Optometrist - November 8th, 2009 [November 8th, 2009]
- Join CFI in opposing funding mandates for quackery in health care reform - November 8th, 2009 [November 8th, 2009]
- Mainstreaming Science-Based Medicine: A Novel Approach - November 8th, 2009 [November 8th, 2009]
- Those who live in glass houses… - November 8th, 2009 [November 8th, 2009]
- J.B. Handley of the anti-vaccine group Generation Rescue: Misogynistic attacks on journalists who champion science - November 8th, 2009 [November 8th, 2009]
- When homeopaths attack medicine and physics - November 8th, 2009 [November 8th, 2009]
- The cancer screening kerfuffle erupts again: “Rethinking” screening for breast and prostate cancer - November 8th, 2009 [November 8th, 2009]
- All Medicines Are Poison! - November 8th, 2009 [November 8th, 2009]
- When Loud Wins: Will Your Tax Dollars Pay For Prayer? - November 8th, 2009 [November 8th, 2009]
- It’s All in Your Head - November 8th, 2009 [November 8th, 2009]
- The Skeptical O.B. joins the Science-Based Medicine crew - November 8th, 2009 [November 8th, 2009]
- The Tragic Death Toll of Homebirth - November 8th, 2009 [November 8th, 2009]
- What’s the right C-section rate? Higher than you think. - November 8th, 2009 [November 8th, 2009]
- Recombinant Human Antithrombin – Milking Nanny Goats for Big Bucks - December 13th, 2009 [December 13th, 2009]
- Does C-section increase the rate of neonatal death? - December 13th, 2009 [December 13th, 2009]
- Man in Coma 23 Years – Is He Really Conscious? - December 13th, 2009 [December 13th, 2009]
- Why Universal Hepatitis B Vaccination Isn’t Quite Universal - December 13th, 2009 [December 13th, 2009]
- Ontario naturopathic prescribing proposal is bad medicine - December 13th, 2009 [December 13th, 2009]
- Naturopaths and the anti-vaccine movement: Hijacking the law in service of pseudoscience - December 13th, 2009 [December 13th, 2009]
- The Institute for Science in Medicine enters the health care reform fray - December 13th, 2009 [December 13th, 2009]
- Neti pots – Ancient Ayurvedic Treatment Validated by Scientific Evidence - December 13th, 2009 [December 13th, 2009]
- Early Intervention for Autism - December 13th, 2009 [December 13th, 2009]
- A temporary reprieve from legislative madness - December 13th, 2009 [December 13th, 2009]
- A critique of the leading study of American homebirth - December 13th, 2009 [December 13th, 2009]
- Lose those holiday pounds - December 13th, 2009 [December 13th, 2009]
- Endocrine disruptors—the one true cause? - December 13th, 2009 [December 13th, 2009]
- Acupuncture for Chronic Prostatitis/Chronic Pelvic Pain Syndrome - December 13th, 2009 [December 13th, 2009]
- Evidence in Medicine: Experimental Studies - December 13th, 2009 [December 13th, 2009]
- Midwives and the assault on scientific evidence - December 13th, 2009 [December 13th, 2009]
- The Mammogram Post-Mortem - December 13th, 2009 [December 13th, 2009]
- An Influenza Recap: The End of the Second Wave - December 13th, 2009 [December 13th, 2009]
- The End of Chiropractic - December 13th, 2009 [December 13th, 2009]
- Cell phones and cancer again, or: Oh, no! My cell phone’s going to give me cancer! (revisited) - December 20th, 2009 [December 20th, 2009]
- Another wrinkle to the USPSTF mammogram guidelines kerfuffle: What about African-American women? - December 20th, 2009 [December 20th, 2009]
- Acupuncture, the P-Value Fallacy, and Honesty - December 20th, 2009 [December 20th, 2009]
- The One True Cause of All Disease - December 20th, 2009 [December 20th, 2009]
- Communicating with the Locked-In - December 20th, 2009 [December 20th, 2009]
- Are the benefits of breastfeeding oversold? - December 20th, 2009 [December 20th, 2009]
- Measles - December 20th, 2009 [December 20th, 2009]
- Radiation from medical imaging and cancer risk - December 21st, 2009 [December 21st, 2009]
- Multiple Sclerosis and Irrational Exuberance - December 21st, 2009 [December 21st, 2009]
- Medical Fun with Christmas Carols - December 22nd, 2009 [December 22nd, 2009]
- Lithium for ALS – Angioplasty for MS - December 23rd, 2009 [December 23rd, 2009]
- “Toxins”: the new evil humours - December 24th, 2009 [December 24th, 2009]
- 2009’s Top 5 Threats To Science In Medicine - December 24th, 2009 [December 24th, 2009]
- Buteyko Breathing Technique – Nothing to Hyperventilate About - December 26th, 2009 [December 26th, 2009]
- The Graston Technique – Inducing Microtrauma with Instruments - December 29th, 2009 [December 29th, 2009]
- The “pharma shill” gambit - December 29th, 2009 [December 29th, 2009]
- Ginkgo biloba – No Effect - December 30th, 2009 [December 30th, 2009]
- Oppose “Big Floss”; practice alternative dentistry - January 1st, 2010 [January 1st, 2010]
- Causation and Hill’s Criteria - January 3rd, 2010 [January 3rd, 2010]
- The life cycle of translational research - January 10th, 2010 [January 10th, 2010]
- The anti-vaccine movement strikes back against Dr. Paul Offit - January 10th, 2010 [January 10th, 2010]
- Osteoporosis Drugs: Good Medicine or Big Pharma Scam? - January 10th, 2010 [January 10th, 2010]
- Acupuncture for Hot Flashes - January 10th, 2010 [January 10th, 2010]
- The case for neonatal circumcision - January 10th, 2010 [January 10th, 2010]
- A victory for science-based medicine - January 10th, 2010 [January 10th, 2010]
- James Ray and testosterone replacement therapy (TRT) - January 10th, 2010 [January 10th, 2010]
- The Water Cure: Another Example of Self Deception and the “Lone Genius” - January 12th, 2010 [January 12th, 2010]
- Be careful what you wish for, Dr. Dossey, you just might get it - January 13th, 2010 [January 13th, 2010]
- You. You. Who are you calling a You You? - January 15th, 2010 [January 15th, 2010]
- The War on Salt - January 16th, 2010 [January 16th, 2010]
- Is breech vaginal delivery safe? - January 16th, 2010 [January 16th, 2010]