Weight, corticosterone and glucose: Changes with time of day after food deprivation

Sheri Sommerville, Vernon J. Perez, Jeffrey W. Elias, Constance J. Smith

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The effects of constant food deprivation, terminated at different times of day were examined with respect to percent body weight loss (%BWL), plasma corticosterone (PC) and plasma glucose (PG). A 19-hour food deprivation paradigm schedule staggered around varying times of the day-night cycle was used. Patterns of %BWL related to nocturnal lipogenesis and diurnal lipolysis showed the greatest loss (10%) occurring at 0700 hr, while in evening hours, there was an increasing pattern of weight loss, with the greatest amount (7%) occurring at 2200 hr. A pattern suggestive of neuroregulatory cycles of glucocorticoid release was evident for PC levels; maximum levels for PC (23.2 μg%) were reported at 0700 hr and at 1900 hr (16.6 μg%). Similar patterns were also noted in PG levels, with respective maximum levels of 138.0 mg% and 125.8 mg% occurring at 0700 hr and 1900 hr. These results indicate that the time of day that a deprivation schedule is initiated and terminated is an important consideration due to the impact of circadian photoperiodism. Time of day should be an essential consideration when utilizing deprivation paradigms.

Original languageEnglish (US)
Pages (from-to)137-140
Number of pages4
JournalPhysiology and Behavior
Volume44
Issue number1
DOIs
StatePublished - 1988
Externally publishedYes

Keywords

  • Body weight loss
  • Corticosterone
  • Day-night cycle
  • Deprivation
  • Glucose

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience

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