Chronic food restriction and the circadian rhythms of pituitary-adrenal hormones, growth hormone and thyroid-stimulating hormone

A. Armarioa, J. L. Monteroa, T. Jolin

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    79 Citations (Scopus)

    Abstract

    Adult male Sprague-Dawley rats were subjected to food restriction so that they ate 65% of food ingested by control rats. While control rats had free access to food over the 24-hour period, food-restricted rats were provided with food daily at 10 a.m. The experimental period lasted for 34 days. On day 35, rats from both experimental groups were killed at 08.00, 11.00, 14.00, 24.00 and 02.00 h. Food restriction modified the circadian rhythms of ACTH and corticosterone. In addition, total circulating corticosterone throughout the day was higher in food-restricted than in control rats. In contrast, food restriction resulted in depressed secretion of thyroid-stimulating hormone and growth hormone. The results indicate that time of food availability entrained circadian corticosterone rhythm but not thyroid-stimulating hormone and growth hormone rhythms. © 1987 S. Karger AG, Basel.
    Original languageEnglish
    Pages (from-to)81-87
    JournalAnnals of Nutrition and Metabolism
    Volume31
    DOIs
    Publication statusPublished - 1 Jan 1987

    Keywords

    • Food restriction
    • Growth hormone
    • Pituitary-adrenal axis
    • Thyroid stimulating hormone

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