Affiliation:
1. Department of Cell Biology & Physiology University of Kansas Medical Center Kansas City Kansas USA
2. Kansas Center Metabolism and Obesity Research Kansas City Kansas USA
3. Research Service Kansas City Veterans Affairs Medical Center Kansas City Kansas USA
Abstract
AbstractObjectiveThe impact of early‐life stress on weight‐loss maintenance is unknown.MethodsMice underwent neonatal maternal separation (NMS) from 0 to 3 weeks and were weaned onto a high‐fat sucrose diet (HFSD) from 3 to 20 weeks. Calorie‐restricted weight loss on a low‐fat sucrose diet (LFSD) occurred over 2 weeks to induce a 20% loss in body weight, which was maintained for 6 weeks. After weight loss, half of the mice received running wheels, and the other half remained sedentary. Mice were then fed ad libitum on an HFSD or LFSD for 10 weeks and were allowed to regain body weight.ResultsNMS mice had greater weight regain, total body weight, and adiposity compared with naïve mice. During the first week of refeeding, NMS mice had increased food intake and were in a greater positive energy balance than naïve mice. Female mice were more susceptible to NMS‐induced effects, including increases in adiposity. NMS and naïve females were more susceptible to HFSD‐induced weight regain. Exercise was beneficial in the first week of regain in male mice, but, long‐term, only those on the LFSD benefited from exercise. As expected, HFSD led to greater weight regain than LFSD.ConclusionsEarly‐life stress increases weight regain in mice.
Funder
National Institutes of Health
National Institute of Arthritis and Musculoskeletal and Skin Diseases
National Institute of Diabetes and Digestive and Kidney Diseases
NIH Office of the Director
Subject
Nutrition and Dietetics,Endocrinology,Endocrinology, Diabetes and Metabolism,Medicine (miscellaneous)