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Quirós Cognuck S, Reis WL, Silva M, Debarba LK, Mecawi AS, de Paula FJA, Rodrigues Franci C, Elias LLK, Antunes-Rodrigues J. Sex differences in body composition, metabolism-related hormones, and energy homeostasis during aging in Wistar rats. Physiol Rep 2021; 8:e14597. [PMID: 33075214 PMCID: PMC7571994 DOI: 10.14814/phy2.14597] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/06/2020] [Accepted: 09/07/2020] [Indexed: 12/14/2022] Open
Abstract
Aging affects the body composition and balance of energy metabolism. Here, we collected in a single work several physiological parameters to show how aging and sex differences can influence energy homeostasis. Body mass index (BMI), Lee index, glucose tolerance, glycemia, and lipidogram in fasting were measured in male and female Wistar rats at the ages of 2, 6, 9, 12, and 18 months. We also measured the lipid profile, free fatty acids, glycerol, glycemia, leptin, adiponectin, insulin, corticosterone (CORT), prolactin (PRL), thyroid stimulated hormone, and triiodothyronine (T3) in 3‐ and 18‐month‐old rats of both sexes, fed ad libitum. Animals were classified as obese beginning at 2 months in males and 6 months in females. Aged male rats showed hyperglycemia and glucose intolerance compared to young males and old females. In the ad libitum condition, the 18‐month males presented higher serum levels of triglycerides, total cholesterol, and free fatty acids than females. The 18‐month‐old females had higher PRL and CORT concentration than males, but insulin and T3 were higher in 18‐month‐old males than females. Our work demonstrated that aging processes on energy metabolism in rats is sex specific, with a better lipid profile and glucose tolerance in aged females.
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Affiliation(s)
- Susana Quirós Cognuck
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Wagner L Reis
- Department of Physiological Science, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolos, Brazil
| | - Marcia Silva
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Lucas K Debarba
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Andre S Mecawi
- Laboratory of Neuroendocrinology, Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - Francisco J A de Paula
- Medical Clinic Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Celso Rodrigues Franci
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Lucila L K Elias
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Jose Antunes-Rodrigues
- Physiology Department, Ribeirao Preto Medicine School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
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