A group of researchers from France, Canada and the UK have discovered a link between the risk of Type 2 diabetes and several mutations in the body's melatonin receptor gene, a gene known as MTNR1B. Working with a group of 7,632 European women -- 3,186 of whom already had Type 2 diabetes -- researchers found:
- 40 different -- and rare -- mutations to the melatonin receptor gene associated with varying degrees of increased risk of Type 2 diabetes.
- 4 of these rare mutations actually caused a total loss of function in the melatonin receptor gene
- Analyzing these 4 mutations in an additional 11,854 people, researchers found that the presence of any single one was associated with a significantly increased risk of Type 2 diabetes -- a risk as much as six times higher than average.