The abstracts for the forthcoming American Society of Clinical Oncology 2012 Genitourinary Cancers Symposium (ASCO GU) have been released and offer insight into some of the new data that will be presented at the meeting.

Algeta Alpharadin 223 ASCO GU: radium 233 Alpharadin significantly prolongs time to first Skeletal Related EventThe results of the phase III ALSYMPCA trial for radium-223 (Alpharadin) in prostate cancer were presented at ECCO/ESMO last September by Dr Chris Parker.

As expected, there is no change to data presented in Stockholm that showed radium-223 (Alpharadin) improves both Overall Survival and Skeletal Related Events:

radium-223 Overall Survival Benefit
median 14.0 vs 11.2 months; P value = 0.00185; HR = 0.695

radium-223 time to first SRE 
median 13.6 vs 8.4 months; P value = 0.00046; HR = 0.610

However, the meeting abstract published today shows that radium-223 in bone-metastatic castration resistant prostate cancer patients (CRPC), not only significantly prolonged time to first skeletal related event (SRE), but significantly prolonged 3 out of the 4 SRE components:

  • time to spinal cord compression,
  • time to pathological bone fracture
  • time to external beam radiation

No significant improvement in the SRE component of time to surgical intervention was seen with radium-223.

Subscribers to Premium Content can login to read commentary by Dr Oliver Sartor on the clinical significance of this data:

 ASCO GU: radium 233 Alpharadin significantly prolongs time to first Skeletal Related Event

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