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Congenital adiponectin deficiency mitigates high-fat-diet-induced obesity in gonadally intact male and female, but not in ovariectomized mice.
Unger, Christian A; Aladhami, Ahmed K; Hope, Marion C; Pourhoseini, Sahar; Nagarkatti, Mitzi; McGuinness, Owen P; Murphy, E Angela; Velázquez, Kandy T; Enos, Reilly T.
Afiliación
  • Unger CA; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • Aladhami AK; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • Hope MC; Nursing College, University of Baghdad, Baghdad, Iraq.
  • Pourhoseini S; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • Nagarkatti M; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • McGuinness OP; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • Murphy EA; Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, 37232, USA.
  • Velázquez KT; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
  • Enos RT; Department of Pathology, Microbiology, and Immunology, University of South Carolina-School of Medicine, 6439 Garners Ferry Rd, Columbia, SC, 29209, USA.
Sci Rep ; 12(1): 16668, 2022 10 05.
Article en En | MEDLINE | ID: mdl-36198723
Epidemiological literature indicates that women are less susceptible to type II diabetes (T2D) than males. The general consensus is that estrogen is protective, whereas its deficiency in post-menopause is associated with adiposity and impaired insulin sensitivity. However, epidemiological data suggests that males are more prone to developing T2D, and at a lower BMI, compared to females during post-menopausal years; suggesting that another factor, other than estrogen, protects females. We proposed to determine if adiponectin (APN) serves as this protective factor. An initial experiment was performed in which gonadally intact male and female mice were fed either a purified low-fat diet (LFD) or high-fat diet (HFD) (40% kcals from fat) for 16 weeks. An additional group of HFD ovariectomy (OVX) mice were included to assess estrogen deficiency's impact on obesity. Body composition, adipose tissue inflammation, ectopic lipid accumulation as well as glucose metabolism and insulin resistance were assessed. In corroboration with previous data, estrogen deficiency (OVX) exacerbated HFD-induced obesity in female mice. However, despite a higher body fat percentage and a similar degree of hepatic and skeletal muscle lipid accumulation, female OVX HFD-fed mice exhibited enhanced insulin sensitivity relative to HFD-fed males. Therefore, a subsequent HFD experiment was performed utilizing male and female (both gonadally intact and OVX) APN deficient mice (APN-/-) and wildtype littermates to determine if APN is the factor which protects OVX females from the similar degree of metabolic dysfunction as males in the setting of obesity. Indirect calorimetry was used to determine observed phenotype differences. APN deficiency limited adiposity and mitigated HFD-induced insulin resistance and adipose tissue inflammation in gonadally intact male and female, but not in OVX mice. Using indirect calorimetry, we uncovered that slight, but non-statistically significant differences in food intake and energy expenditure leading to a net difference in energy balance likely explain the reduced body weight exhibited by male APN-deficient mice. In conclusion, congenital APN deficiency is protective against obesity development in gonadally intact mice, however, in the setting of estrogen deficiency (OVX) this is not true. These findings suggest that gonadal status dictates the protective effects of congenital APN deficiency in the setting of HFD-induced obesity.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resistencia a la Insulina / Diabetes Mellitus Tipo 2 Tipo de estudio: Etiology_studies Límite: Animals Idioma: En Revista: Sci Rep Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resistencia a la Insulina / Diabetes Mellitus Tipo 2 Tipo de estudio: Etiology_studies Límite: Animals Idioma: En Revista: Sci Rep Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos
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