Epidemiology of diabetes, obesity and chronic kidney disease over the lifecourse.
SummaryA moderate increase of cancer risk has been shown in diabetic patients and in subjects with abnormal glucose tolerance, mainly in digestive sites, independently of obesity, with on the contrary a protective effect for prostate cancer. Insulin-resistance with compensatory hyperinsulinemia, and elevated levels of circulating growth factors are usually considered as the link between cancer and hyperglycaemia, through activated cell proliferation. Antidiabetic treatments inducing elevated plasma insulin seem to increase cancer risk and, on the opposite, insulin-sensitizers antidiabetic drugs (metformine, thiazolidinediones) seem to reduce cancer risk. In 2009, a big fuss has been raised concerning a specific action of glargine insulin to increase cancer risk from an observational study in Germany accumulating methodological pitfalls, without any clear confirmation from other studies.Unexplained poor glycaemic control in known diabetic patients should lead to screen for a cancer, and diagnosis of cancer should not distract from appropriate management of diabetes care.Greater public awareness about healthy lifestyles (diet, physical activity) is needed to prevent these two major increasing Public Health issues, and in the meanwhile should reduce the frequency of obesity and cardiovascular diseases in the whole population.Keywords : type 2 diabetes, cancer, hyperinsulinemia, growth factors, epidemiology -3 -
RésuméSauf pour la prostate, il existe un risque modérément accru de cancer, en particulier digestif,