Cited by 116Regulation of Appetite and ObesityDietary Effects on HealthHypothalamic control of reproductive hormones

Possible entrainment of ghrelin to habitual meal patterns in humans

Frecka, Julie M., Mattes, Richard D.·2008·American Journal of Physiology-Gastrointestinal and Liver Physiology

Abstract

Ghrelin is reportedly a meal-initiation signal based on observations that concentrations increase before meals coincident with rising hunger. However, evidence that ghrelin peaks vary with feeding schedules suggests that it rises in anticipation of an expected meal, rather than eliciting feeding. To explore the entrainment of ghrelin profiles, this study investigated the association between varying habitual meal patterns and plasma ghrelin concentrations. Lean and obese adults following either a short intermeal interval (SII) pattern, with 2.5–3.5 h between their habitual breakfast and lunch times, or a long intermeal interval (LII) pattern, with 5.5–6.5 h between these eating occasions, participated. Food intake and appetite were recorded for 2 baseline days. On the subsequent test day, blood samples were collected over 8 h while participants ate a breakfast and lunch matched to their customary meals and pattern. Appetite ratings were obtained and ghrelin, insulin, glucose, and leptin concentrations were measured. Peak ghrelin concentrations differed significantly by group and occurred prior to each group's respective lunch time. Ghrelin concentrations directly correlated with subjective hunger. This association was stronger when hunger preceded ghrelin, a pattern inconsistent with ghrelin causing the hunger rise. Ghrelin concentrations were inversely correlated with insulin, and peak insulin concentrations preceded nadir ghrelin concentrations postprandially. Ghrelin concentrations periprandially, and over the entire test session, did not differ by meal group, likely because of similar intakes between groups. These data demonstrate that the timing of ghrelin peaks is related to habitual meal patterns and may rise in anticipation of eating rather than eliciting feeding.

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Crossref · 10.1152/ajpgi.00448.2007

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Authors
Frecka, J. M., & Mattes, R. D.
Affiliations
Purdue University West Lafayette (US)
Venue
American Journal of Physiology-Gastrointestinal and Liver Physiology
Published
2008-03
Volume
294
Issue
3
Pages
G699-G707
ISSN
  • 0193-1857 (ISSN-L)
  • 1522-1547
OpenAlex
W2128855912
Cited by
116
References
48
Citations by year
2026: 3 · 2025: 1 · 2024: 5 · 2023: 2 · 2022: 9 · 2021: 8 · 2020: 3 · 2019: 4 · 2018: 23 · 2017: 7 · 2016: 8 · 2015: 3 · 2014: 4 · 2013: 5 · 2012: 9
FWCI
3.27
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Gastrointestinal and Liver Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
ghrelin, meal patterns, intermeal interval, meal timing, subjective hunger, insulin, leptin, plasma ghrelin concentration, appetite, postprandial ghrelin, obesity
MeSH terms
Adolescent, Adult, Anthropometry, Appetite, Blood Glucose, Eating, Feeding Behavior, Female, Humans, Insulin, Male, Middle Aged, Obesity, Body Mass Index, Leptin, Ghrelin

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