To mark the 60th anniversary of the first clinical use of metformin for diabetes, Diabetologia has commissioned a series of articles on the many evolving (and controversial) aspects of metformin use. To begin, a historical overview is provided by Clifford Bailey (DOI 10.1007/s00125-017-4318-z), followed by an outline of the mechanisms of action by Rena et al (DOI 10.1007/s00125-017-4342-z). Sanchez-Rangel and Inzucchi (DOI 10.1007/s00125-017-4336-x) go on to present data for the efficacy and safety of metformin in type 2 diabetes, for which it is the first-line therapy. In contrast, Livingstone and colleagues (DOI 10.1007/s00125-017-4364-6) discuss its use in type 1 diabetes and Aroda et al (DOI 10.1007/s00125-017-4361-9) present findings for its potential use for diabetes prevention. Griffin et al (DOI 10.1007/s00125-017-4337-9) investigate the association between metformin and cardiovascular disease risk by conducting a meta-analysis, whilst Sam and Ehrmann (DOI 10.1007/s00125-017-4306-3) and Lindsay and Loeken (DOI 10.1007/s00125-017-4351-y) discuss its use in polycystic ovary syndrome and pregnancy, respectively. Metformin therapy in the ageing population is reviewed by Valencia et al (DOI 10.1007/s00125-017-4349-5), and Michael Pollak (DOI 10.1007/s00125-017-4352-x) confers the non-glycaemic effects of metformin, suggesting a role for the human microbiota/gut metabolome and the immune system. Another emerging area of interest, the impact of metformin on cancer incidence and mortality, is covered by Heckman-Stoddard et al (DOI 10.1007/s00125-017-4372-6). Finally, to address the heterogeneity in response to metformin therapy, Jose Florez (DOI 10.1007/s00125-017-4335-y) advises how a personalised approach may be achieved using genetic studies. In summary, this review series demonstrates how metformin shows promise in many conditions, but how long can this drug remain at the top spot?
This review set is accompanied by an editorial by Sally Marshall (DOI 10.1007/s00125-017-4343-y): 60 years of metformin use: what we have learnt and what we have yet to discover
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