Cited by 150Mitochondrial Function and PathologyEstrogen and related hormone effectsReproductive Biology and Fertility

Effect of Sex Differences on Brain Mitochondrial Function and Its Suppression by Ovariectomy and in Aged Mice

Gaignard, Pauline, Savouroux, Stéphane, Liere, Philippe, Pianos, Antoine, Thérond, Patrice, Schumacher, Michael, Slama, Abdelhamid, Guennoun, Rachida·2015·Endocrinology

Abstract

Sex steroids regulate brain function in both normal and pathological states. Mitochondria are an essential target of steroids, as demonstrated by the experimental administration of 17β-estradiol or progesterone (PROG) to ovariectomized female rodents, but the influence of endogenous sex steroids remains understudied. To address this issue, mitochondrial oxidative stress, the oxidative phosphorylation system, and brain steroid levels were analyzed under 3 different experimental sets of endocrine conditions. The first set was designed to study steroid-mediated sex differences in young male and female mice, intact and after gonadectomy. The second set concerned young female mice at 3 time points of the estrous cycle in order to analyze the influence of transient variations in steroid levels. The third set involved the evaluation of the effects of a permanent decrease in gonadal steroids in aged male and female mice. Our results show that young adult females have lower oxidative stress and a higher reduced nicotinamide adenine dinucleotide (NADH)-linked respiration rate, which is related to a higher pyruvate dehydrogenase complex activity as compared with young adult males. This sex difference did not depend on phases of the estrous cycle, was suppressed by ovariectomy but not by orchidectomy, and no longer existed in aged mice. Concomitant analysis of brain steroids showed that pregnenolone and PROG brain levels were higher in females during the reproductive period than in males and decreased with aging in females. These findings suggest that the major male/female differences in brain pregnenolone and PROG levels may contribute to the sex differences observed in brain mitochondrial function.

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Crossref · 10.1210/en.2014-1913

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  • Under physiological conditions, sex-specific differences in mitochondrial respiration, bioenergetics, and reactive oxygen species production have been reported in both human and animal studies.

    “Under physiological conditions, sex-specific differences in mitochondrial respiration, bioenergetics, and reactive oxygen species production have been reported in both human and animal studies.”
  • Mitochondria extracted from brain, liver, and cerebral arteries of female rodents displayed more efficient oxidative phosphorylation than in males.

    “mitochondria extracted from brain, liver, and cerebral arteries of female rodents displayed more efficient oxidative phosphorylation than in males”
  • Estrogen and progesterone contributed to sex differences in cellular respiration and anti-oxidative functions of brain mitochondria in uninjured female rodents.

    “Estrogen and progesterone contributed to sex differences in cellular respiration and anti-oxidative functions of brain mitochondria in uninjured female rodents.”

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Authors
Gaignard, P., Savouroux, S., Liere, P., Pianos, A., Thérond, P., Schumacher, M., Slama, A., & Guennoun, R.
Affiliations
Université Paris-Sud (FR)
Venue
Endocrinology
Published
2015-08
Volume
156
Issue
8
Pages
2893-2904
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2175348882
Cited by
150
References
45
Citations by year
2026: 8 · 2025: 15 · 2024: 20 · 2023: 23 · 2022: 13 · 2021: 10 · 2020: 9 · 2019: 22 · 2018: 10 · 2017: 14 · 2016: 5 · 2015: 1
FWCI
4.34
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
Institut National de la Santé et de la Recherche Médicale
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
Keywords
sex differences, brain mitochondria, mitochondrial oxidative stress, oxidative phosphorylation, pyruvate dehydrogenase complex, ovariectomy, gonadectomy, estrous cycle, pregnenolone, progesterone, aging, sex steroids
MeSH terms
Aging, Animals, Brain, Estradiol, Flavin-Adenine Dinucleotide, Female, Male, Mice, Inbred C57BL, Mitochondria, NAD, Ovariectomy, Sex Characteristics, Oxidative Stress, Cell Respiration, Mice

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