Cited by 440Regulation of Appetite and ObesityNeuropeptides and Animal PhysiologyHypothalamic control of reproductive hormones

Synergistic interaction between leptin and cholecystokinin to reduce short-term food intake in lean mice

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Barrachina, María Dolores, Martínez, Vicente, Wang, Lixin, Wei, Jen Yu, Taché, Yvette·1997·Proceedings of the National Academy of Sciences

Abstract

Leptin is a circulating protein involved in the long-term regulation of food intake and body weight. Cholecystokinin (CCK) is released postprandially and elicits satiety signals. We investigated the interaction between leptin and CCK-8 in the short-term regulation of food intake induced by 24-hr fasting in lean mice. Leptin, injected intraperitoneally (i.p.) at low doses (4–120 μg/kg), which did not influence feeding behavior for the first 3 hr postinjection, decreased food intake dose dependently by 47–83% during the first hour when coinjected with a subthreshold dose of CCK. Such an interaction was not observed between leptin and bombesin. The food-reducing effect of leptin injected with CCK was not associated with alterations in gastric emptying or locomotor behavior. Leptin–CCK action was blocked by systemic capsaicin at a dose inducing functional ablation of sensory afferent fibers and by devazepide, a CCK-A receptor antagonist but not by the CCK-B receptor antagonist, L-365,260. The decrease in food intake which occurs 5 hr after i.p. injection of leptin alone was also blunted by devazepide. Coinjection of leptin and CCK enhanced the number of Fos-positive cells in the hypothalamic paraventricular nucleus by 60%, whereas leptin or CCK alone did not modify Fos expression. These results indicate the existence of a functional synergistic interaction between leptin and CCK leading to early suppression of food intake which involves CCK-A receptors and capsaicin-sensitive afferent fibers.

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  1. [29]Ervin G N, Birkemo L S, Johnson M F, Conger L K, Mosher J T, Menius J A., Jr J Pharmacol Exp Ther. 1995;273:1203–1210. [PubMed] [Google Scholar]

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Authors
Barrachina, M. D., Martínez, V., Wang, L., Wei, J. Y., & Taché, Y.
Affiliations
  • University of California, Los Angeles (US)
  • CURE: Digestive Diseases Research Center, West Los Angeles Veterans Affairs Medical Center, Department of Medicine, and Brain Research Institute, University of California, Los Angeles, CA 90073
  • Salk Institute for Biological Studies (US)
Corresponding author
Taché, Yvette
Venue
Proceedings of the National Academy of Sciences
Published
1997-09-16
Volume
94
Issue
19
Pages
10455-10460
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1996634799
Cited by
440
References
73
Citations by year
2026: 2 · 2025: 6 · 2024: 1 · 2023: 5 · 2022: 7 · 2021: 13 · 2020: 9 · 2019: 9 · 2018: 6 · 2017: 9 · 2016: 9 · 2015: 10 · 2014: 25 · 2013: 12 · 2012: 18
FWCI
7.42
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Amgen
  • National Institutes of Health (5r01dk030110-16, 5k05mh000663-07)
  • National Institute of Mental Health (MH 00663)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 41301, DK30110, P30DK041301)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
leptin, cholecystokinin, CCK-8, food intake regulation, satiety, synergistic interaction, CCK-A receptor, bombesin, paraventricular nucleus, Fos expression, fasting, lean mice, hypothalamus
MeSH terms
Animals, Benzodiazepinones, Bombesin, Capsaicin, Cholecystokinin, Drug Synergism, Feeding Behavior, Gastric Emptying, Immunohistochemistry, Mice, Inbred C57BL, Motor Activity, Paraventricular Hypothalamic Nucleus, Proteins, Stereotyped Behavior, Devazepide, Leptin, Mice

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