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Calorie restricted diet prevents pancreatic inflammation and cancer
Date:4/15/2008

SAN DIEGO - Prevention of weight gain with a restricted calorie diet sharply reduced the development of pancreatic lesions that lead to cancer in preclinical research reported today by researchers from The University of Texas at Austin and The University of Texas M. D. Anderson Cancer Center at the American Association for Cancer Research annual meeting.

The research sheds light on the connection between obesity, calorie intake and pancreatic cancer by comparing a calorie restricted diet, an overweight diet and an obesity-inducing diet in a strain of mice that spontaneously develops pancreatic lesions that lead to cancer.

"Obesity is a known risk factor for pancreatic cancer, but the mechanism underlying that relationship is unknown," said senior author Stephen D. Hursting, Ph.D., professor in M. D. Anderson's Department of Carcinogenesis and Chair of the Division of Nutritional Sciences at the University of Texas. "Our findings indicate that calorie restriction hinders development of pancreatic cancer, which could have implications for prevention and treatment of pancreatic tumors caused by chronic inflammation and obesity."

The group's analysis points to a connection between calorie intake and a protein called Insulin-like Growth Factor (IGF) -1, with obesity increasing and calorie restriction decreasing levels of IGF-1. IGF-1 is an important growth factor known to stimulate the growth of many types of cancer cells. Inflammatory signaling proteins also were found to be reduced in the blood of the calorie-restricted mice.

"Mice on the heavier diets had significantly more lesions and larger lesions than those on the restricted calorie diet," said first author Laura Lashinger, Ph.D., a post-doctoral fellow in Hursting's laboratory. The strain of mice, developed by Susan Fischer, professor in M. D. Anderson's Department of Carcinogenesis, spontaneously develops lesions associated with pancreatitis - inflammation
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Contact: Scott Merville
smerville@mdanderson.org
713-792-0661
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert  

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