A pilot study evaluating dosing tolerability of 17α-estradiol in male common marmosets (Callithrix jacchus)

Roshini Sathiaseelan, Jose V.V. Isola, Roberto Santín-Márquez, Daniel Adekunbi, Michal Fornalik, Adam B. Salmon, Michael B. Stout

Research output: Contribution to journalArticlepeer-review

Abstract

17α-estradiol extends healthspan and lifespan in male mice without significant feminization or deleterious effects on reproductive function, making it a candidate for human translation. However, studies in animal models that more accurately replicate human physiology are necessary to establish 17α-estradiol dosing standards for clinical trials. This study evaluated the tolerability of 17α-estradiol treatment in the common marmoset over a short treatment duration. We found that male marmosets tolerated two dosing regimens (0.37-0.47 or 0.62-0.72 mg/kg/day) as evidenced by the absence of gastrointestinal distress, changes in vital signs, or overall health conditions. 17α-estradiol treatment mildly decreased body mass, adiposity, and glycosylated hemoglobin, although these changes were not statistically significant in most instances. However, neither dose of 17α-estradiol elicited feminization in our study, thereby suggesting that optimized dosing regimens may provide health benefits without feminization in primates. Additional studies are needed to determine if longer duration treatments would also be nonfeminizing and elicit significant health benefits, which would aid in developing dosing regimens targeting healthy aging in humans.

Original languageEnglish (US)
JournalGeroScience
DOIs
StateAccepted/In press - 2024

Keywords

  • Androgen
  • Endocrinology
  • Estrogen
  • Follicle stimulating hormone
  • Luteinizing hormone
  • Nonhuman primate

ASJC Scopus subject areas

  • Aging
  • veterinary (miscalleneous)
  • Complementary and alternative medicine
  • Geriatrics and Gerontology
  • Cardiology and Cardiovascular Medicine

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