An ‘Achilles Heel’ for Aggressive Prostate Cancer Found, UCSF says

Resistant Cancers Self-Destruct When Exposed to Experimental Drug

May 3, 2018. PSA Rising / UCSF / San Francisco researchers have discovered a promising new line of attack against lethal, treatment-resistant prostate cancer. Analysis of hundreds of human prostate tumors revealed that the most aggressive cancers depend on a built-in cellular stress response to put a brake on their own hot-wired physiology. Experiments in mice and with human cells showed that blocking this stress response with an experimental drug — previously shown to enhance cognition and restore memory after brain damage in rodents — causes treatment-resistant cancer cells to self-destruct while leaving normal cells unaffected.

Metastatic prostate cancer cells treated with experimental drug ISRIB.
Metastatic human prostate cancer cells transplanted into a mouse self-destruct (red) when treated with ISRIB, an experimental drug that exposes cancer cells to their full, unhealthy appetite for protein synthesis. Credit: Ruggero Lab / UCSF

The new study was published online May 2, 2018 in Science Translational Medicine. Continue reading “An ‘Achilles Heel’ for Aggressive Prostate Cancer Found, UCSF says”

Taking Prostate Cancer Drug Abiraterone acetate (Zytiga) After a Meal Boosts Impact, Lowers Cost

Monday, 9 April 2018. By taking a high-cost drug with a low-fat meal—instead of on an empty stomach, as prescribed—prostate cancer patients could decrease their daily dose, prevent digestive issues and cut costs by 75 percent, according to a new study in the March 28, 2018, issue of the Journal of Clinical Oncology (JCO).

Abiraterone acetate, marketed as Zytiga®, is a standard medicine prescribed for metastatic castration-resistant prostate cancer. The pharmaceutical company tells patients on Zytiga to take four of the 250 milligram pills first thing in the morning. Then, having gone without food overnight, they must wait at least one more hour before eating breakfast.

“This schedule is not only inconvenient for patients, it’s also wasteful, in several ways,” said the study’s lead author, Russell Szmulewitz, MD, associate professor of medicine at the University of Chicago and a prostate cancer specialist.

Continue reading “Taking Prostate Cancer Drug Abiraterone acetate (Zytiga) After a Meal Boosts Impact, Lowers Cost”