When the FDA approved Abiraterone with prednisone (Zytiga) in the pre-chemotherapy stage they approved it after an interim analysis of data was performed of the phase III clinical trial (COU-AA-302), The analysis was performed by an independent data monitoring committee that found a significant difference in radiographic progression-free survival (scans that showed no tumor progression [...]
Somehow I have been negligent and not let people know that I have written and posted a major update of my “Guide to Advanced Prostate Cancer.” As in the past, it is available as a free download from the Malecare web site. Helping me to update the book was prostate cancer survivor Craig Pynn and [...]
Expected and extraordinary news today on the new treatment front. Medivation and Astellas’ Xtandi (enzalutamide) was approved for use in men with castrate resistant prostate cancer. The new FDA approved label for Xtandi says that it is for the treatment of men with metastatic castration-resistant prostate cancer. This label is basically the same as for [...]
Abiraterone acetate (AA) or Zytiga has demonstrated a survival benefit in the pre-chemotherapy setting for men with advanced prostate cancer that has become castrate resistant (mCRPC). As a result it is in widespread clinical use in the United States prior to the use of chemotherapy with docetaxel. Since its FDA approval post chemotherapy there has [...]
In yesterday's post I wrote about the possibility of looking for the presence of the splice variant ARV7 to determine if you would be resistant to enzalutamide (Xtandi). Today I am going to expand on this issue and discuss an additional study that demonstrated that the presence of ARV7 in circulating tumor cells not only [...]
Abiraterone Acetate (Zytiga) and enzalutamide (Xtandi) are the newest generation hormonal agents. They both have demonstrated a survival advantage in men with castrate resistant prostate cancer (CRPC) who have already been treated with docetaxel (chemotherapy). Unfortunately all men who are responsive to both of these drugs eventually become resistant. Some men are subject to early [...]
What will happen when enzalutamide (Xtandi) is approved for use in advanced prostate cancer in the disease stage prior to chemotherapy (that is if it is approved)? Already occupying this space and already approved by the FDA is both Provenge and abiraterone (Zytiga). Where will Xtandi fit in? Until we have a lot more data, [...]
The FDA approved Abiraterone acetate (Zytiga) plus prednisone because it demonstrated a survival benefit for men with metastatic castrate resistant prostate cancer (mCRPC) in the pre-chemotherapy setting. Given the newness of the approval of Zytiga in this disease stage there is a lack of data on how Zytiga affects the efficacy of enzalutamide (Xtandi) or [...]
In my continuing reports about interesting and pertinent information released at the ASCO 2014 meeting one abstract described a phase 2 trial combining an attack on androgens in metastatic prostate cancer resistant to initial hormone therapy. This proof of concept study showed that combining Enzalutamide (Xtandi) plus abiraterone (Zytiga) drove down testosterone levels and appeared [...]
Given all the newly approved drugs available to us to treat advanced prostate cancer there now are many questions about the optimal sequencing of these drugs and whether earlier use of one causes cross-resistance to another. Recently, it was reported that chemotherapy with docetaxel is inactive in men with metastatic castrate resistant prostate cancer (mCRPC) [...]
