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Am J Physiol Regul Integr Comp Physiol. 2014 Dec 1;307(11):R1338-44. doi: 10.1152/ajpregu.00329.2014. Epub 2014 Oct 8.

Leptin receptor signaling in the lateral parabrachial nucleus contributes to the control of food intake.

Author information

1
Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania; and amberla@sas.upenn.edu.
2
Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania.
3
Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania; and.

Abstract

Pontine parabrachial nucleus (PBN) neurons integrate visceral, oral, and other sensory information, playing an integral role in the neural control of feeding. Current experiments probed whether lateral PBN (lPBN) leptin receptor (LepRb) signaling contributes to this function. Intra-lPBN leptin microinjection significantly reduced cumulative chow intake, average meal size, and body weight in rats, independent of effects on locomotor activity or gastric emptying. In contrast to the effects observed following LepRb activation in other nuclei, lPBN LepRb stimulation did not affect progressive ratio responding for sucrose reward or conditioned place preference for a palatable food. Collectively, results suggest that lPBN LepRb activation reduces food intake by modulating the neural processing of meal size/satiation signaling, and highlight the lPBN as a novel site of action for leptin-mediated food intake control.

KEYWORDS:

PBN; food intake; leptin; meal size; obesity

PMID:
25298514
PMCID:
PMC4254942
DOI:
10.1152/ajpregu.00329.2014
[Indexed for MEDLINE]
Free PMC Article

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