Inflammatory Gene RIPK1 Provides Clue to Obesity Risk

New inflammation gene was found to increase obesity risk, revealed research.

RIPK1, the gene that helps control inflammation was found to increase the risk of obesity, and could be turned off in mice to stop weight gain, a study from The University of Queensland has found.

UQ Institute for Molecular Bioscience //researcher Dr Denuja Karunakaran said she was determined to unravel the links between inflammation and obesity that went deeper than excessive eating or lack of exercise.

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"We found small changes in the inflammatory gene RIPK1 in the obese people, and these variations caused an increased amount of the gene being present in their fat tissue, increasing their risk of being obese," Dr Karunakaran said.

"RIPK1 is essential for a healthy immune response, but it also causes hyper-inflammation when it 'goes rogue'.

"By finding an increased amount of inflammation in obese people, we can confidently say that obesity increases inflammation."

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The researchers then looked at the effect of turning the inflammatory gene on and off in mice.

Without the gene, the mice remained at a normal weight despite eating a high-fat diet and their risk of diabetes was reduced.

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The mice with a normal level of the inflammatory gene put on weight from eating the same high-fat diet.

More than half the 2000 participants were extremely obese with an average Body Max Index of 41 and half were a healthy weight.

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Dr Karunakaran said that when stores exceeded healthy levels, the fat tissue became overwhelmed, cells died and the immune system was activated.

"By understanding more about these inflammation pathways, we can find ways to intervene to treat obesity, especially in specific groups of people.

"These variations in the RIPK1 gene only occur in 8 to 12 per cent of the population - so maybe these are the people who struggle to lose weight despite doing all the right things."

Source-Eurekalert