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Abstract
Disrupted feeding and fasting cycles as well as chronic high-fat diet–induced (HFD-induced) obesity are associated with cardiovascular disease risk factors. We designed studies that determined whether 2 weeks of time-restricted feeding (TRF) intervention in mice fed a chronic HFD would reduce cardiovascular disease risk factors. Mice were fed a normal diet (ND; 10% fat) ad libitum or HFD (45% fat) for 18 weeks ad libitum to establish diet-induced obesity. ND or HFD mice were continued on ad libitum diet or subjected to TRF (limiting food availability to 12 hours only during the dark phase) during the final 2 weeks of the feeding protocol. TRF improved whole-body metabolic diurnal rhythms without a change in body weight. HFD mice showed reduced blood pressure dipping compared with ND, which was restored by TRF. Further, TRF reduced aortic wall thickness, decreased aortic stiffness, as well as increased kidney tubular brush border integrity, decreased renal medullary fibrosis, and reduced renal medullary T cell inflammation in HFD mice. These findings indicate that TRF may be an effective intervention for improving vascular and kidney health in a model of established diet-induced obesity.
Authors
Paramita Pati, Carmen De Miguel, Jodi R. Paul, Dingguo Zhang, Jackson Colson, John Miller Allan, Claudia J. Edell, Megan K. Rhoads, Luke S. Dunaway, Sara N. Biswal, Yihan Zhong, Randee Sedaka, Telisha Millender-Swain, Shannon M. Bailey, Karen L. Gamble, David M. Pollock, Jennifer S. Pollock
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