Effects of moderate calorie restriction on testosterone production and semen characteristics in young rhesus macaques (Macaca mulatta)

Brandon D. Sitzmann, Erin H. Leone, Julie A. Mattison, Donald K. Ingram, George S. Roth, Henryk F. Urbanski, Mary B. Zelinski, Mary Ann Ottinger

    Research output: Contribution to journalArticle

    21 Scopus citations

    Abstract

    We have previously reported a modest influence of moderate calorie restriction (CR) on testicular gene expression in young adult rhesus macaques (Macaca mulatta); however, it is unclear if these modifications correspond to subsequent changes in testicular function or sperm physiology. This study extends our earlier findings to examine potential physiological differences due to this differential gene expression. Animals were subjected to 30% CR (CR, n=5) or were fed a standard control diet (CON, n = 5) starting during their peripubertal period. Circulating testosterone (T) levels were measured across a 24-h period after 7 yr of dietary treatment and were found to be similar in CR and CON males; however, maintenance of daily minimum T levels was significantly higher in the CR animals. Semen collection was performed on the same cohort of animals three times per male (CR, n = 4; CON, n = 4) after 8 yr of treatment, and samples were assessed by a variety of measures. Parameters, including semen quality and sperm cell viability and function, showed less variability in semen samples taken from CR males, but overall testicular function and sperm quality were comparable regardless of diet. There is mounting evidence that CR may promote health and longevity in a wide range of organisms, including nonhuman primates. Importantly, our data suggest that moderate CR has no obvious lasting detrimental effect on testicular function and sperm parameters in young adult primates and may in fact help maintain higher levels of circulating T.

    Original languageEnglish (US)
    Pages (from-to)635-640
    Number of pages6
    JournalBiology of reproduction
    Volume83
    Issue number4
    DOIs
    StatePublished - Oct 2010

    Keywords

    • Calorie restriction
    • Rhesus macaque
    • Semen collection
    • Sperm
    • Testis
    • Testosterone

    ASJC Scopus subject areas

    • Reproductive Medicine
    • Cell Biology

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