Major Cause of Drug-resistance in Prostate Cancer Patients Identified
Mutations in the SPOP gene (depicted on the left) can be used to guide administration of anti-cancer drugs (labeled treatment A through D below) in patients with prostate cancer. Credit: Mayo Clinic
Mayo Clinic researchers have identified a new cause of treatment resistance in prostate cancer. Their discovery also suggests ways to improve prostate cancer therapy. The findings appear in Nature Medicine.
In the publication, the authors explain the role of mutations within the SPOP gene on the development of resistance to one class of drugs. SPOP mutations are the most frequent genetic changes seen in primary prostate cancer. These mutations play a central role in the development of resistance to drugs called BET-inhibitors.
BET, bromodomain and extra-terminal domain, inhibitors are drugs that prevent the action of BET proteins. These proteins help guide the abnormal growth of cancer cells.
As a therapy, BET-inhibitors are promising, but drug resistance often develops, says Haojie Huang, Ph.D., senior author and a molecular biologist within Mayo Clinic’s Center for Biomedical Discovery. Prostate cancer is among the most diagnosed malignancies in the United States. It is also the third leading cause of cancer death in American men, according to the American Cancer Society. Because of this, says Dr. Huang, improving treatments for prostate cancer is an important public health goal.
In the publication, the authors report SPOP mutations stabilize BET proteins against the action of BET-inhibitors. By this action, the mutations also promote cancer cell proliferation, invasion and survival.
“These findings have important implications for prostate cancer treatment, because SPOP mutation or elevated BET protein expression can now be used as biomarkers to improve outcome of BET inhibitor-oriented therapy of prostate cancer with SPOP mutation or BET protein overexpression,” says Dr. Huang.
Mutations in the SPOP gene can then be used to guide administration of anti-cancer drugs in patients with prostate cancer:
Researchers Discover Mutation That Appears to Protect Against Multiple Aspects of Biological AgingNews
The first genetic mutation that appears to protect against multiple aspects of biological aging in humans has been discovered in an extended family of Old Order Amish living in the vicinity of Berne, Indiana, report Northwestern Medicine scientists.READ MORE
Computer Program Helps Find Ways to Repurpose Existing DrugsNews
Researchers have developed a computer program to find new indications for old drugs. The computer program, called DrugPredict, matches existing data about FDA-approved drugs to diseases, and predicts potential drug efficacy.READ MORE
Prostate- and Colon Cancer Targeted With Tapeworm DrugNews
Recently researchers found that a substance in medicine against parasites like Giardia and Tapeworms, acts like tailored medicine against prostate- and colon cancer.READ MORE