In the News
AR-V7 status predicts abiraterone, enzalutamide response in mCRPC
The PROPHECY study represents a multicenter effort that provides prospective, blinded clinical validation around such an approach and suggests that both the JHU CTC AR-V7 mRNA assay and the Epic CTC nuclear-specific AR-V7 protein assay provide clinical utility around the anticipated outcomes with therapy.
Test Predicts Resistance to Hormonal Therapy in Prostate Cancer - Validation study confirms assist in decision-making
A blood test that measures the spliced variant of an androgen receptor called AR-V7 in circulating tumor cells successfully predicted resistance to commonly used hormonal therapy agents in advanced prostate cancer, a validation study confirmed.
Large Prospective Trial Validates Detection of AR-V7 Biomarker Using Epic Sciences' Platform to Predict Treatment Outcomes for Patients with Advanced Prostate Cancer
Epic Sciences, Inc. (Epic) today announced the publication of results from a multicenter prospective trial validating the biomarker AR-V7 (androgen receptor splice variant-7) as a predictor of resistance to anti-androgen therapy in men with metastatic castration-resistant prostate cancer (mCRPC). Data from the PROPHECY trial, published in the Journal of Clinical Oncology, demonstrate that detection of AR-V7 in circulating tumor cells (CTCs) in blood is predictive of whether men with mCRPC have become resistant to androgen-receptor signaling (ARS) inhibitors and have a low chance of benefit from further ARS therapy.
CTC AR-V7 Validated as Predictive Marker of Resistance to AR-Directed Therapy in mCRPC
Nuclear-localized androgen receptor splice variant 7 (AR-V7) protein in circulating tumor cells (CTCs) is a predictive marker of shorter progression-free and overall survival (OS) with antiandrogen therapy in patients with metastatic castration-resistant prostate cancer (mCRPC), according to results from the phase III PROPHECY trial that were published in the Journal of Clinical Oncology.
Blood Test Study Meets Goal, Validates Epic’s Prostate Cancer Target
Epic Sciences has commercialized a blood test that can predict how likely a patient with late-stage prostate cancer treated with hormones is likely to respond to an additional course of such therapy. Now, the San Diego-based company has additional data that it says supports use of its tests to determine when not to use hormone therapy.
Blood Tests Predict Effectiveness of Hormonal Therapies
A multi-institutional group of clinical researchers, led by the Duke Cancer Institute’s Andrew Armstrong, MD, McS, FACP, published a new report this month in the Journal of Clinical Oncology, that describes results from the PROPHECY study, which prospectively compared two blood tests to assess how well they predicted the effectiveness of hormonal therapy in men with metastatic prostate cancer.
ASCO GU 2019: A Phase II Trial in Progress: Pamiparib, an Investigational PARP Inhibitor, in Patients with mCRPC and a Circulating Tumor Cell Homologous Recombination Deficiency Phenotype or BRCA Defects
San Francisco, CA (UroToday.com) Prostate cancer is one of the leading causes of cancer deaths in men. Patients with metastatic castration-resistant prostate cancer (mCRPC) who have a BRCA1/2 mutation or mutations in other homologous recombination deficiency genes have aggressive disease and a worse prognosis. Poly (ADP-ribose) polymerase (PARP) proteins are a family of proteins involved in DNA repair, genome stability, and programmed cell death. Inhibition of PARP proteins allows for the accumulation of unrepaired single-strand breaks, which are converted to double-strand breaks during cell division and can lead to apoptosis/cell death. DNA repair can be compromised by the absence of homologous recombination components such as BRCA1 or BRCA2.