New link discovered between maternal diet and risk of diabetes
UK researchers have shown one way in which poor nutrition in the womb can put a person at greater risk of developing type 2 diabetes and other age-related diseases in later life.
The researchers say their finding could lead to new ways of identifying people who are at a higher risk of developing these diseases and might open up targets for treatment.
The team, from the University of Cambridge and the Medical Research Council (MRC) Toxicology Unit at the University of Leicester, have just published their findings in the journal Cell Death and Differentiation.
The research shows that, in both rats and humans, individuals who experience a poor diet in the womb are less able to store fats correctly in later life. Storing fats in the right areas of the body is important because otherwise they can accumulate in places like the liver and muscle where they are more likely to lead to disease.
University of Leicester’s Professor Anne Willis said, “One of the ways that our bodies cope with a rich modern western diet is by storing excess calories in fat cells. When these cells aren’t able to absorb the excess then fats get deposited in other places, like the liver, where they are much more dangerous and can lead to type 2 diabetes.”
The team found that this process is controlled by a molecule called miR-483-3p. They found that miR-483-3p was produced at higher levels in individuals who had experienced a poor diet in their mother’s wombs than those who were better nourished.
When pregnant rats were fed low protein diets their offspring had higher levels of miR-483-3p. This led to them developing smaller fat cells and left them less able to store fats in adulthood. These rats were less likely to get fat when fed a high calorie diet but were at a higher risk of developing diabetes. Rats are known to be a good model for studying human dietary diseases and the team also found that miR-483-3p was present in elevated levels in a group of people who were born with a low birth weight.
Dr Susan Ozanne, a British Heart Foundation Senior Fellow, who led the work at the University of Cambridge, adds “It has been known for a while that your mother’s diet during pregnancy plays an important role in your adult health, but the mechanisms in the body that underlie this aren’t well understood. We have shown in detail how one mechanism links poor maternal diet to diabetes and other diseases that develop as we age.”
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