Symbiotic bacteria discovery adds new twist to obesity research. In a front page article, USA Today (12/21, 1A, Weise) reports that two new studies published in today's edition of Nature "show that there are different colonies of bacteria in the intestines of the obese than there are in the innards of the slim," and that "the microbes in an overweight body are more efficient at extracting calories from food." Firmicutes bacteria "were more plentiful in the obese than in the lean," and "bacteroidetes were less abundant than in normal-weight subjects." Study co-author Sam Klein, professor of gastroenterology at Washington University in St. Louis, said that the "findings open up a new area of research."
In another front page article, the Los Angeles Times (12/21, A1, Maugh) adds, "The same disparity was found in mice, and giving lean mice the bacteria from fat animals caused them to gain weight, the researchers said." When obese lost weight, "the proportions of bacteria in their digestive system -- initially similar to that of the obese mice -- changed as the subjects lost weight, with the number of Firmicutes decreasing and the number of Bacteroidetes increasing." However, "experts cautioned that it was too soon to manipulate gut bacteria in the hopes of becoming slimmer."
Also in a front page story, the Atlanta Journal-Constitution (12/21, A1, Toner) notes that the researchers "acknowledge that obese people may simply have more of those bacteria by virtue of having higher body fat." Still, they say "coping with obesity will be more complicated than just following the old mantra to 'eat less and exercise more.'"
The Washington Post (12/21, A12, Stein) reports that even though "the researchers acknowledged that the difference in the number of calories extracted by the microbes is relatively small," they say that "over time even a small differential could be significant." The Post says that this "startling discovery" has "produced enthusiasm and caution from other researchers."
The Minneapolis Star-Tribune /AP (12/21, Borenstein) adds that Nikhil Dhurandhar, a professor of infection and obesity at Louisiana State University's Pennington Biomedical Research Center, "said the field of 'infectobesity' looks at obesity with multiple causes, including viruses and microbes. In another decade or so, the different causes of obesity could have different treatments."
In another front page article, the Los Angeles Times (12/21, A1, Maugh) adds, "The same disparity was found in mice, and giving lean mice the bacteria from fat animals caused them to gain weight, the researchers said." When obese lost weight, "the proportions of bacteria in their digestive system -- initially similar to that of the obese mice -- changed as the subjects lost weight, with the number of Firmicutes decreasing and the number of Bacteroidetes increasing." However, "experts cautioned that it was too soon to manipulate gut bacteria in the hopes of becoming slimmer."
Also in a front page story, the Atlanta Journal-Constitution (12/21, A1, Toner) notes that the researchers "acknowledge that obese people may simply have more of those bacteria by virtue of having higher body fat." Still, they say "coping with obesity will be more complicated than just following the old mantra to 'eat less and exercise more.'"
The Washington Post (12/21, A12, Stein) reports that even though "the researchers acknowledged that the difference in the number of calories extracted by the microbes is relatively small," they say that "over time even a small differential could be significant." The Post says that this "startling discovery" has "produced enthusiasm and caution from other researchers."
The Minneapolis Star-Tribune /AP (12/21, Borenstein) adds that Nikhil Dhurandhar, a professor of infection and obesity at Louisiana State University's Pennington Biomedical Research Center, "said the field of 'infectobesity' looks at obesity with multiple causes, including viruses and microbes. In another decade or so, the different causes of obesity could have different treatments."