Antagonism of T-type calcium channels inhibits high-fat diet-induced weight gain in mice

作者：Uebele Victor N^*; Gotter Anthony L; Nuss Cindy E; Kraus Richard L; Doran Scott M; Garson Susan L; Reiss Duane R; Li Yuxing; Barrow James C; Reger Thomas S; Yang Zhi Qiang; Ballard Jeanine E; Tang Cuyue; Metzger Joseph M; Wang Sheng Ping; Koblan Kenneth S; Renger John J

来源：Journal of Clinical Investigation, 2009, 119(6): 1659-1667.

DOI：10.1172/JCI36954

The epidemics of obesity and metabolic disorders have well-recognized health and economic burdens. Pharmacologic treatments for these diseases remain unsatisfactory with respect to both efficacy and side-effect profiles. Here, we have identified a potential central role for T-type calcium channels in regulating body weight maintenance and steep. Previously, it was shown that mice lacking Ca(v)3.1 T-type calcium channels have altered steep/wake activity. We found that these mice were also resistant to high-fat diet-induced weight gain, without changes in food intake or sensitivity to high-fat diet-induced disruptions of diurnal rhythm. Administration of a potent and selective antagonist of T-type calcium channels, TTA-A2, to normal-weight animals prior to the inactive phase acutely increased sleep, decreased body core temperature, and prevented high-fat diet-induced weight gain. Administration of TTA-A2 to obese rodents reduced body weight and fat mass while concurrently increasing lean muscle mass. These effects likely result from better alignment of diurnal feeding patterns with daily changes in circadian physiology and potentially an increased metabolic rate during the active phase. Together, these studies reveal what we believe to be a previously unknown role for T-type calcium channels in the regulation of sleep and weight maintenance and suggest the potential for a novel therapeutic approach to treating obesity.

• 出版日期2009-6