Metformin joins the fight against cancer. (IMAGE) Okayama University Caption Scientists report that metformin, used to treat type 2 diabetes mellitus, induces activation and proliferation of tumor-targeting CD8+ T-lymphocytes (CD8TIL), via mechanisms that involve the generation of reactive oxygen species in mitochondria of CD8TIL and an increase in glycolysis. Credit Heiichiro Udono from Okayama University Usage Restrictions Nothing License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.