"In addition, intermittent fasting which increases FGF21 concentrations also extends life span in mice. This raises the intriguing possibility that FGF21 might be a longevity factor," Dr. Kliewer said.
"This is something that we're beginning to test in the lab," he said. "But our genetically engineered mice have all the classic hallmarks of extended life span: growth hormone resistance, low concentrations of IGF-1, increased insulin sensitivity and small size."
FGF21 is already being tested in human clinical trials for treatment of obesity and diabetes in adults, but the new findings linking FGF21 to interference with growth hormone might indicate that caution is needed before using it in children or teens, Dr. Kliewer said.
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| Contact: Aline McKenzie aline.mckenzie@utsouthwestern.edu 214-648-3404 UT Southwestern Medical Center Source:Eurekalert |