New discovery opens doors to manipulating fat production in the body

"Our study suggests that it may be the type of fat-storing cells produced in our bodies that determines risk for disease, rather than the amount of fat," said Dwight J. Klemm, Ph.D., a researcher involved in the work from the University of Colorado Anschutz Medical Campus in Aurora, Colorado. "This paradigm highlights the possibility of new strategies to prevent and reverse fat-related chronic disease by controlling the production of different types of fat-storing cells."

To make their discovery, Klemm and colleagues recruited human subjects who received bone marrow transplants for clinical reasons from a different human donor many months before the study. A small sample of fat tissue was removed from just under the skin next to the belly button. The DNA from the fat cells in the tissue sample was evaluated to determine if it came from the person who donated the bone marrow or the transplant recipient. They found the presence of donor DNA, which indicated that some of the fat cells had grown from cells that originated in the transplanted bone marrow. Previous research with mice indicates that fat-storing cells produced from bone marrow stem cells may be particularly harmful because they produce substances that promote inflammation and hinder the ability of other cells to respond to insulin.

"This research may help unravel many of the mysteries associated with weight gain, weight loss, and the effects that excessive fat has on the body," said Thoru Pederson, Ph.D., Editor-in-Chief of The FASEB Journal. "The more we learn about this interesting discovery, the closer we are toward shutting down the harmful effects of fat cells at the source."