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Disappearance of body fat in normal rats induced by adenovirus-mediated leptin gene therapy

By Guoxun Chen, Kazunori Koyama, Xue Yuan, Young Lee, Yan-Ting Zhou, Robert O’Doherty, Christopher B. Newgard and Roger H. Unger

Abstract

Sustained hyperleptinemia of 8 ng/ml was induced for 28 days in normal Wistar rats by infusing a recombinant adenovirus containing the rat leptin cDNA (AdCMV-leptin). Hyperleptinemic rats exhibited a 30–50% reduction in food intake and gained only 22 g over the experimental period versus 115–132 g in control animals that received saline infusions or a recombinant virus containing the β-galactosidase gene (AdCMV-βGal). Body fat was absent in hyperleptinemic rats, whereas control rats pair-fed to the hyperleptinemic rats retained ≈50% body fat. Further, plasma triglycerides and insulin levels were significantly lower in hyperleptinemic versus pair-fed controls, while fatty acid and glucose levels were similar in the two groups, suggestive of enhanced insulin sensitivity in the hyperleptinemic animals. Thus, despite equivalent reductions in food intake and weight gain in hyperleptinemic and pair-fed animals, identifiable fat tissue was completely ablated only in the former group, raising the possibility of a specific lipoatrophic activity for leptin

Topics: Biological Sciences
Publisher: The National Academy of Sciences of the USA
Year: 1996
OAI identifier: oai:pubmedcentral.nih.gov:26215
Provided by: PubMed Central
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