Cited by 34Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismOvarian function and disorders

Combined androgen excess and Western-style diet accelerates adipose tissue dysfunction in young adult, female nonhuman primates

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Varlamov, Oleg, Bishop, Cecily V., Handu, Mithila, Takahashi, Diana, Srinivasan, Sathya, White, Ashley, Roberts, Charles T.·2017·Human Reproduction

Abstract

STUDY QUESTION: What are the separate and combined effects of mild hyperandrogenemia and consumption of a high-fat Western-style diet (WSD) on white adipose tissue (WAT) morphology and function in young adult female nonhuman primates? SUMMARY ANSWER: Combined exposure to mild hyperandrogenemia and WSD induces visceral omental (OM-WAT) but not subcutaneous (SC-WAT) adipocyte hypertrophy that is associated with increased uptake and reduced mobilization of free fatty acids. WHAT IS KNOWN ALREADY: Mild hyperandrogenemia in females, principally in the context of polycystic ovary syndrome, is often associated with adipocyte hypertrophy, but the mechanisms of associated WAT dysfunction and depot specificity remain poorly understood. STUDY DESIGN, SIZE AND DURATION: Female rhesus macaques were randomly assigned at 2.5 years of age (near menarche) to receive either cholesterol (C; n = 20) or testosterone (T; n = 20)-containing silastic implants to elevate T levels 5-fold above baseline. Half of each of these groups was then fed either a low-fat monkey chow diet or WSD, resulting in four treatment groups (C, control diet; T alone; WSD alone; T + WSD; n = 10/group) that were maintained until the current analyses were performed at 5.5 years of age (3 years of treatment, young adults). PARTICIPANTS/MATERIALS, SETTING AND METHODS: OM and SC-WAT biopsies were collected and analyzed longitudinally for in vivo changes in adipocyte area and blood vessel density, and ex vivo basal and insulin-stimulated fatty acid uptake and basal and isoproterenol-stimulated lipolysis. MAIN RESULTS AND THE ROLE OF CHANCE: In years 2 and 3 of treatment, the T + WSD group exhibited a significantly greater increase in OM adipocyte size compared to all other groups (P < 0.05), while the size of SC adipocytes measured at the end of the study was not significantly different between groups. In year 3, both WAT depots from the WSD and T + WSD groups displayed a significant reduction in local capillary length and vessel junction density (P < 0.05). In year 3, insulin-stimulated fatty acid uptake in OM-WAT was increased in the T + WSD group compared to year 2 (P < 0.05). In year 3, basal lipolysis was blunted in the T and T + WSD groups in both WAT depots (P < 0.01), while isoproterenol-stimulated lipolysis was significantly blunted in the T and T + WSD groups only in SC-WAT (P < 0.01). LIMITATIONS, REASONS FOR CAUTION: At this stage of the study, subjects were still relatively young adults, so that the effects of mild hyperandrogenemia and WSD may become more apparent with increasing age. WIDER IMPLICATIONS OF THE FINDINGS: The combination of mild hyperandrogenemia and WSD accelerates the development of WAT dysfunction through T-specific (suppression of lipolytic response by T), WSD-dependent (reduced capillary density) and combined T + WSD (increased fatty acid uptake) mechanisms. These data support the idea that combined hyperandrogenemia and WSD increases the risk of developing obesity in females. STUDY FUNDING/COMPETING INTEREST(S): Research reported in this publication was supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health under award number P50 HD071836 to C.T.R. and award number OD 011092 from the Office of the Director, National Institutes of Health, for operation of the Oregon National Primate Research Center. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

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  • In rhesus monkeys, the combination of a high-fat diet and testosterone treatment accelerated development of white adipose tissue dysfunction.

    “In a treatment paradigm comparing a high-fat diet with/or without testosterone treatment in rhesus monkeys, the combination of a high-fat diet and testosterone treatment accelerated development of white adipose tissue dysfunction [98].”

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Authors
Varlamov, O., Bishop, C. V., Handu, M., Takahashi, D., Srinivasan, S., White, A., & Roberts, C. T.
Affiliations
Oregon National Primate Research Center (US)
Corresponding author
Varlamov, Oleg
Venue
Human Reproduction
Published
2017-07-20
Volume
32
Issue
9
Pages
1892-1902
ISSN
  • 0268-1161 (ISSN-L)
  • 1460-2350
OpenAlex
W2737855310
Cited by
34
References
75
Citations by year
2025: 4 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 5 · 2020: 3 · 2019: 5 · 2018: 1 · 2017: 3
FWCI
2.57
Type
journal article
Language
en
Open access
Locations
  • Human Reproduction (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Eunice Kennedy Shriver National Institute of Child Health & Human Development
  • National Institutes of Health (P50 HD071836)
  • Oregon National Primate Research Center (P51 OD011092)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
Keywords
hyperandrogenemia, Western diet, subcutaneous adipose tissue, adipocyte hypertrophy, testosterone, cholesterol, polycystic ovary syndrome, free fatty acid uptake, lipolysis, adipose tissue vascularization, rhesus monkeys, young adult women, dietary fat, insulin sensitivity
MeSH terms
Adipose Tissue, Animals, Female, Macaca mulatta, Testosterone, Hyperandrogenism, Adipocytes, Cell Size, Diet, Western

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