Aging-related sex-dependent loss of the circulating leptin 24-h rhythm in the rhesus monkey

Jodi L. Downs, Henryk Urbanski

    Research output: Contribution to journalArticle

    23 Citations (Scopus)

    Abstract

    The adipocyte-derived hormone leptin plays a pivotal role in the regulation of body weight and energy homeostasis. Many studies have indicated that the circulating levels of leptin show a 24-h rhythm, but the exact cause and nature of this rhythm is still unclear. In the present study, we remotely collected blood samples every hour from young and old, male and female rhesus monkeys, and examined their 24-h plasma leptin profiles. In both the young males (10-11 years) and females (7-13 years), a clear 24-h plasma leptin rhythm was evident with a peak occurring ∼ 4 h into the night and a nadir occurring ∼ 1 h into the day (lights on from 0700 to 1900 h). A 24-h plasma leptin rhythm was also observed in the old males (23-30 years), even when they were maintained under constant lighting conditions (continuous dim illumination of ∼ 100 lx). In marked contrast, plasma leptin concentrations were relatively constant across the day and night in old peri- and post-menopausal females (17-24 years), regardless of the lighting schedule. These data establish that rhesus monkeys, like humans, show a daily nocturnal rise in plasma leptin, and the magnitude of this rhythm undergoes a sex-specific aging-dependent attenuation. Furthermore, they suggest that the underlying endocrine mechanism may be driven in part by a circadian clock mechanism.

    Original languageEnglish (US)
    Pages (from-to)117-127
    Number of pages11
    JournalJournal of Endocrinology
    Volume190
    Issue number1
    DOIs
    StatePublished - Jul 2006

    Fingerprint

    Leptin
    Macaca mulatta
    Lighting
    Circadian Clocks
    Adipocytes
    Appointments and Schedules
    Homeostasis
    Body Weight
    Hormones
    Light

    ASJC Scopus subject areas

    • Endocrinology

    Cite this

    Aging-related sex-dependent loss of the circulating leptin 24-h rhythm in the rhesus monkey. / Downs, Jodi L.; Urbanski, Henryk.

    In: Journal of Endocrinology, Vol. 190, No. 1, 07.2006, p. 117-127.

    Research output: Contribution to journalArticle

    @article{7c616d7fcf964eeb9c547285f893681f,
    title = "Aging-related sex-dependent loss of the circulating leptin 24-h rhythm in the rhesus monkey",
    abstract = "The adipocyte-derived hormone leptin plays a pivotal role in the regulation of body weight and energy homeostasis. Many studies have indicated that the circulating levels of leptin show a 24-h rhythm, but the exact cause and nature of this rhythm is still unclear. In the present study, we remotely collected blood samples every hour from young and old, male and female rhesus monkeys, and examined their 24-h plasma leptin profiles. In both the young males (10-11 years) and females (7-13 years), a clear 24-h plasma leptin rhythm was evident with a peak occurring ∼ 4 h into the night and a nadir occurring ∼ 1 h into the day (lights on from 0700 to 1900 h). A 24-h plasma leptin rhythm was also observed in the old males (23-30 years), even when they were maintained under constant lighting conditions (continuous dim illumination of ∼ 100 lx). In marked contrast, plasma leptin concentrations were relatively constant across the day and night in old peri- and post-menopausal females (17-24 years), regardless of the lighting schedule. These data establish that rhesus monkeys, like humans, show a daily nocturnal rise in plasma leptin, and the magnitude of this rhythm undergoes a sex-specific aging-dependent attenuation. Furthermore, they suggest that the underlying endocrine mechanism may be driven in part by a circadian clock mechanism.",
    author = "Downs, {Jodi L.} and Henryk Urbanski",
    year = "2006",
    month = "7",
    doi = "10.1677/joe.1.06745",
    language = "English (US)",
    volume = "190",
    pages = "117--127",
    journal = "Journal of Endocrinology",
    issn = "0022-0795",
    publisher = "Society for Endocrinology",
    number = "1",

    }

    TY - JOUR

    T1 - Aging-related sex-dependent loss of the circulating leptin 24-h rhythm in the rhesus monkey

    AU - Downs, Jodi L.

    AU - Urbanski, Henryk

    PY - 2006/7

    Y1 - 2006/7

    N2 - The adipocyte-derived hormone leptin plays a pivotal role in the regulation of body weight and energy homeostasis. Many studies have indicated that the circulating levels of leptin show a 24-h rhythm, but the exact cause and nature of this rhythm is still unclear. In the present study, we remotely collected blood samples every hour from young and old, male and female rhesus monkeys, and examined their 24-h plasma leptin profiles. In both the young males (10-11 years) and females (7-13 years), a clear 24-h plasma leptin rhythm was evident with a peak occurring ∼ 4 h into the night and a nadir occurring ∼ 1 h into the day (lights on from 0700 to 1900 h). A 24-h plasma leptin rhythm was also observed in the old males (23-30 years), even when they were maintained under constant lighting conditions (continuous dim illumination of ∼ 100 lx). In marked contrast, plasma leptin concentrations were relatively constant across the day and night in old peri- and post-menopausal females (17-24 years), regardless of the lighting schedule. These data establish that rhesus monkeys, like humans, show a daily nocturnal rise in plasma leptin, and the magnitude of this rhythm undergoes a sex-specific aging-dependent attenuation. Furthermore, they suggest that the underlying endocrine mechanism may be driven in part by a circadian clock mechanism.

    AB - The adipocyte-derived hormone leptin plays a pivotal role in the regulation of body weight and energy homeostasis. Many studies have indicated that the circulating levels of leptin show a 24-h rhythm, but the exact cause and nature of this rhythm is still unclear. In the present study, we remotely collected blood samples every hour from young and old, male and female rhesus monkeys, and examined their 24-h plasma leptin profiles. In both the young males (10-11 years) and females (7-13 years), a clear 24-h plasma leptin rhythm was evident with a peak occurring ∼ 4 h into the night and a nadir occurring ∼ 1 h into the day (lights on from 0700 to 1900 h). A 24-h plasma leptin rhythm was also observed in the old males (23-30 years), even when they were maintained under constant lighting conditions (continuous dim illumination of ∼ 100 lx). In marked contrast, plasma leptin concentrations were relatively constant across the day and night in old peri- and post-menopausal females (17-24 years), regardless of the lighting schedule. These data establish that rhesus monkeys, like humans, show a daily nocturnal rise in plasma leptin, and the magnitude of this rhythm undergoes a sex-specific aging-dependent attenuation. Furthermore, they suggest that the underlying endocrine mechanism may be driven in part by a circadian clock mechanism.

    UR - http://www.scopus.com/inward/record.url?scp=33746683685&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=33746683685&partnerID=8YFLogxK

    U2 - 10.1677/joe.1.06745

    DO - 10.1677/joe.1.06745

    M3 - Article

    C2 - 16837616

    AN - SCOPUS:33746683685

    VL - 190

    SP - 117

    EP - 127

    JO - Journal of Endocrinology

    JF - Journal of Endocrinology

    SN - 0022-0795

    IS - 1

    ER -