DetailsCategory: DNA RNA and CellsPublished on Tuesday, 06 July 2021 15:58Hits: 290
PASADENA, CA, USA I July 6, 2021 I Arrowhead Pharmaceuticals Inc. (NASDAQ: ARWR) today announced positive interim results from the first two cohorts of AROHIF21001, a Phase 1b dose-finding clinical study of ARO-HIF2, the companys investigational RNA interference (RNAi) therapeutic being developed as a treatment for patients with clear cell renal cell carcinoma (ccRCC). ARO-HIF2 is the first tumor-targeted investigational medicine to utilize Arrowheads proprietary Targeted RNAi Molecule (TRiM) platform in a clinical trial. Arrowhead is currently enrolling the third planned patient cohort of AROHIF21001 and the company intends to present additional data at an appropriate medical congress.
James Hamilton, M.D., MBA, senior vice president of discovery and translational medicine at Arrowhead, said: The AROHIF21001 Phase 1b study is designed to evaluate safety as well as preliminary pharmacodynamics and efficacy in an advanced ccRCC patient population. We believe that in the first two dose cohorts investigational ARO-HIF2 is showing clear signs of meaningful target engagement and some potentially early signs of efficacy in at least one patient. This is an encouraging start for the study. Specifically, in seventeen patients treated with investigational ARO-HIF2, nine had tumor biopsy material that could be evaluated. Seven of these nine tumor samples demonstrated reductions in HIF2 protein, as measured by immunohistochemistry H-score. The mean of these reductions was -48% with a range from -9% to -82%. In addition, one patient achieved a partial response with tumor shrinkage of approximately 65% and four additional patients in cohort 2 remain on study drug with stable disease. Tumors typically have a high level of heterogeneity and the patients in AROHIF21001 have advanced ccRCC and have failed multiple lines of treatment including checkpoint inhibitors and anti-VEGF regimens, so these early results in a heavily pre-treated population are encouraging for investigational ARO-HIF2 and our tumor-targeted platform broadly. ARO-HIF2 has been generally well-tolerated and we look forward to continued dose escalation.
Key Results from AROHIF21001
AROHIF21001 (NCT04169711) is a Phase 1b dose-finding clinical study in patients with advanced ccRCC to evaluate the safety of ARO-HIF2 and to determine the recommended Phase 2 dose. Secondary objectives include the assessment of pharmacokinetics and preliminary efficacy, based on Response Evaluation Criteria in Solid Tumors (RECIST). Exploratory objectives for AROHIF21001 are post-dose tumoral expression of HIF genes in response to treatment with ARO-HIF2, change in Karnofsky Performance Status (KPS), correlation of tumor response based on RECIST with tumor HIF2 gene expression and tumor integrin expression, correlation of integrin expression with changes in HIF gene expression, evaluation of serum biomarkers of ARO-HIF2 activity, correlation of RCC-related gene expression to ARO-HIF2 activity, and evaluation of plasma and urine metabolites.
About Arrowhead Pharmaceuticals
Arrowhead Pharmaceuticals develops medicines that treat intractable diseases by silencing the genes that cause them. Using a broad portfolio of RNA chemistries and efficient modes of delivery, Arrowhead therapies trigger the RNA interference mechanism to induce rapid, deep, and durable knockdown of target genes. RNA interference, or RNAi, is a mechanism present in living cells that inhibits the expression of a specific gene, thereby affecting the production of a specific protein. Arrowheads RNAi-based therapeutics leverage this natural pathway of gene silencing.
For more information, please visit http://www.arrowheadpharma.com, or follow us on Twitter @ArrowheadPharma. To be added to the Company's email list and receive news directly, please visit http://ir.arrowheadpharma.com/email-alerts.
SOURCE: Arrowhead Pharmaceuticals
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