alexa Metformin Has a Positive Therapeutic Effect on Prostate Cancer in Patients With Type 2 Diabetes Mellitus.
Oncology

Oncology

Journal of Prostate Cancer

Author(s): Chong RW, Vasudevan V, Zuber J, Solomon SS, Chong RW, Vasudevan V, Zuber J, Solomon SS

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Abstract OBJECTIVE: Prostate cancer and type 2 diabetes mellitus (DM2) are both common diseases found in the elderly male population. The diabetic drug, metformin, has been shown to have antineoplastic properties and demonstrated better treatment outcomes when used as adjuvant therapy in patients with breast cancer. The hormonally-sensitive cancer analogous to breast cancer in men is prostate cancer. We investigated improved survival, lower risks of recurrences, and lower, more stable levels of prostate-specific antigen (PSA) in patients with DM2 along with prostate cancer on metformin. METHODS: Patients with prostate cancer along with DM2 who remained on metformin were compared with controls who were 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\% versus 10\%), fewer recurrences (15\% versus 8\%), fewer metastases (5\% versus 0\%) and fewer secondary cancers (17\% versus 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 (ie, surgery, radiation and androgen depletion) were found to be comparable in both the 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 also 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. Published by Elsevier Inc.
This article was published in Am J Med Sci and referenced in Journal of Prostate Cancer

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