Targeted Radiation Therapy Yields High Response Rates in Metastatic Prostate Cancer

Excerpt:

“The targeted radiation therapy Lutetium-177 PSMA-617 produced high response rates among men with prostate-specific membrane antigen-positive metastatic, castration-resistant prostate cancer, according to results of a single-arm, phase 2 trial scheduled for presentation at Genitourinary Cancers Symposium.

“The treatment also appeared well-tolerated among these men, whose disease had progressed after multiple standard therapies.”

Go to full article.

If you’re wondering whether this story applies to your own cancer case or a loved one’s, we invite you to use our ASK Cancer Commons service.


Combo Tx No Help After PSA Progression in mCRPC

Excerpt:

“Adding abiraterone acetate (Zytiga) to enzalutamide (Xtandi) did not improve progression-free survival (PFS) after prostate-specific antigen (PSA) progression in men on enzalutamide monotherapy for chemotherapy-naive metastatic castration-resistant prostate cancer (mCRPC), researchers found.

“In the randomized, double-blind PLATO trial, the median PFS in patients treated with enzalutamide plus abiraterone and prednisone was 5.7 months. By comparison, the PFS was 5.6 months in the control group treated with abiraterone and prednisone plus placebo (hazard ratio [HR] 0.83; P=0.22).”

Go to full article.

If you’re wondering whether this story applies to your own cancer case or a loved one’s, we invite you to use our ASK Cancer Commons service.


Elevated Insulin-Like Growth Factor Binding Protein-1 (IGFBP-1) in Men with Metastatic Prostate Cancer Starting Androgen Deprivation Therapy (ADT) is Associated with Shorter Time to Castration Resi…

BACKGROUND: Insulin-like growth factor (IGF) and adipokines have been implicated in prostate cancer carcinogenesis. METHOD: Data from 122 men with serum samples drawn within 3 months of starting ADT for metastatic prostate cancer was accessed retrospectively. IGF-1, IGF binding protein (BP)-1, leptin, and adiponectin levels were measured by multiplex electrochemiluminescence assays. A multivariable Cox model assessed the association of time to castration resistant prostate cancer (CRPC) and overall survival by the protein levels, adjusted for clinical variables, age and prostate specific antigen (PSA) levels at start of ADT, race, ECOG status, extent of metastases and were reported as hazard ratio (HR) with 95% confidence interval (CI). RESULTS: Median follow-up and overall survival were 44 and 42.2 months, respectively. ECOG performance status (≥1 vs. 0) was negatively associated with overall survival [HR = 2.8 (1.1-7.0), P = 0.03], and PSA nadir <0.2 was predictive of longer time to CRPC [HR = 0.3 (0.2-0.5), P < 0.0001]. The median time to CRPC by low, middle, and top IGFBP-1 tertile distribution was 20.7, 18.1, and 12.4 months, respectively, with HR for middle versus low tertile levels 3.1 (1.7-5), P = 0.0003, and for top versus low tertile levels was 2.4 (1.3-4.2), P = 0.003. The median overall survival by low, middle and top tertile IGFBP-1 level was 48.5, 46.4, and 32.8 months, respectively, with HR for top versus low tertile 2.5 (1.2-5.1), P = 0.01. There was no association with IGF-1, adiponectin and leptin. CONCLUSIONElevated IGFBP-1 appears to be associated with shorter time to CRPC and lower overall survival in men with metastatic prostate cancer.”


Identification of Antiandrogen Resistance Mutation Leads to Design of Molecules That Could Overcome Resistance


Researchers recently identified a genetic mutation that results in resistance to the drug enzalutamide (Xtandi) and to other second-generation antiandrogen receptor drugs. The discovery has already led to the design of new compounds that could overcome this type of resistance in prostate cancer patients. Those compounds are in preclinical studies. Continue reading…