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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Am+J+Med+Sci 2016 ; 351 (4): 416-9 Nephropedia Template TP
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Metformin Has a Positive Therapeutic Effect on Prostate Cancer in Diabetes Mellitus 2 Patients #MMPMID27079349
Chong RW; Vasudevan V; Zuber J; Solomon SS
Am J Med Sci 2016[Apr]; 351 (4): 416-9 PMID27079349show ga
Objective: Prostate cancer and type 2 diabetes mellitus are both common diseases found in the elderly male population. The diabetic drug, metformin, has been shown to have anti-neoplastic properties and demonstrated better treatment outcomes when used as adjuvant therapy in breast cancer patients. The hormonally-sensitive cancer analogous to breast in men is prostate. We investigated improved survival, lower risks of recurrences, and lower, more stable levels of prostate specific antigen (PSA) in DM2 patients with prostate cancer on metformin. Methods: Prostate cancer patients with type 2 diabetes that remained on metformin were compared to controls not on metformin matched by age, weight, race, and Gleason score cancer staging. The endpoints of our study included final PSA values, number of recurrences, metastases and number living for each group. Results: There were significantly fewer deaths (23% vs 10%), fewer recurrences (15% vs 8%), and fewer metastases (5% vs 0%), and fewer secondary cancers (17% vs 6%) in the metformin group (p<0.004). The final PSA value was lower in the metformin-treated group with a result approaching significance (p=0.067). The primary treatments for prostate cancer (i.e. surgery, radiation, androgen depletion) were found to be comparable in both groups. Conclusions: Our retrospective study shows that adjuvant metformin therapy leads to a better prognosis in prostate cancer. Not only are PSA levels controlled for several years, but there are significantly fewer cancer recurrences in metformin treated patients. Overall, these results are promising and should be followed up with a prospective study to assess long-term survival.