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Gene sequence that can make half of us fatter is discovered
Date:5/4/2008

A gene sequence linked to an expanding waist line, weight gain and a tendency to develop type 2 diabetes has been discovered as part of a study published today in the journal Nature Genetics.

The study also shows that the gene sequence is significantly more common in those with Indian Asian than European ancestry. The research, which was funded by the British Heart Foundation, could lead to better ways of treating obesity.

Scientists from Imperial College London and other international institutions have discovered that the sequence is associated with a 2cm expansion in waist circumference, a 2kg gain in weight, and a tendency to become resistant to insulin, which can lead to type 2 diabetes. The sequence is found in 50% of the UK population.

Until now, we have understood remarkably little about the genetic component of common problems linked with obesity, such as cardiovascular disease and diabetes, said Professor Jaspal Kooner, the papers senior author from the National Heart and Lung Institute at Imperial College London. Finding such a close association between a genetic sequence and significant physical effects is very important, especially when the sequence is found in half the population.

The study shows that the sequence is a third more common in those with Indian Asian than in those with European ancestry. This could provide a possible genetic explanation for the particularly high levels of obesity and insulin resistance in Indian Asians, who make up 25% of the worlds population, but who are expected to account for 40% of global cardiovascular disease by 2020.

The new gene sequence sits close to a gene called MC4R, which regulates energy levels in the body by influencing how much we eat and how much energy we expend or conserve. The researchers believe the sequence is involved in controlling the MC4R gene, which has also been implicated in rare forms of extreme childhood obesity.

Previous research
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Contact: Laura Gallagher
L.Gallagher@imperial.ac.uk
44-020-759-46702
Imperial College London
Source:Eurekalert

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