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Recent News and Articles on the Keywords: weight gain + gut bacteria + weight  Related to the article below (Last Update: 7/8/2008)

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Battling bacteria in gut may influence weight gain

Last Updated: 2006-12-20 13:00:43 -0400 (Reuters Health)

LONDON - Body weight and obesity could be affected not only by what we eat but also by how it is digested in the gut, American scientists said on Wednesday.

They have discovered that levels of two types of good microbes or bacteria in the gut that help to break down foods are different in obese and lean people and mice. The finding, reported in the science journal Nature, could lead to a better understanding of why some people may be prone to obesity and help find new ways of preventing or treating it.

"Our gut microbial structure should be considered when understanding the elements that might regulate our energy balance and may predispose us to obesity," Jeffrey Gordon, of the Washington University of Medicine in St Louis, Missouri, said in an interview.

Article continues below and (thank you)
 

 

"There is something very startling about the amount of fat you have and the structure of your gut microbial community," he added.

There are trillions of bacteria in the gastrointestinal tract, but two groups called the Bacteroidetes and the Firmicutes are the most dominant and their proportion varies in lean and obese mice and humans.

The scientists found that the proportion of Bacteroidetes bacteria is lower in obese mice and people than in lean people.

But when Gordon and his team studied 12 obese people who followed low-calorie diets for a year, they found their levels of Bacteroidetes rose as their weight decreased.

"They increased as the weight is lost and in proportion to the amount of weight loss," said Gordon.

The results suggest that there may be a microbial component to obesity. But scientists do not yet know if people start out with lower levels of Bacteroidetes or Firmicutes, which may make them prone to obesity.

"These are things we are exploring now. What are the signals between the amount of fat and different groups of bacteria that exist in the gut," said Gordon.

Strategies to change the levels of the microbes living in the gut could provide an approach to treating obesity.

Copyright © 2006 Reuters Limited. All rights reserved. Republication or redistribution of Reuters content, including by framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. Reuters and the Reuters sphere logo are registered trademarks and trademarks of the Reuters group of companies around the world.

 
 
 
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