Peripheral-specific Y2 receptor knockdown protects mice from high-fat diet-induced obesity

Yan-chuan Shi, Shu Lin, Lesley Castillo, Aygul Aljanova, Ronaldo F. Enriquez, Amy D. Nguyen, Paul A. Baldock, Lei Zhang, Martijn S. Bijker, Laurence Macia, Ernie Yulyaningsih, Hui Zhang, Jackie Lau, Amanda Sainsbury, Herbert Herzog*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Y2 receptors, particularly those in the brain, have been implicated in neuropeptide Y (NPY)-mediated effects on energy homeostasis and bone mass. Recent evidence also indicates a role for Y2 receptors in peripheral tissues in this process by promoting adipose tissue accretion; however their effects on energy balance remain unclear. Here, we show that adult-onset conditional knockdown of Y2 receptors predominantly in peripheral tissues results in protection against diet-induced obesity accompanied by significantly reduced weight gain, marked reduction in adiposity and improvements in glucose tolerance without any adverse effect on lean mass or bone. These changes occur in association with significant increases in energy expenditure, respiratory exchange ratio, and physical activity and despite concurrent hyperphagia. On a chow diet, knockdown of peripheral Y2 receptors results in increased respiratory exchange ratio and physical activity with no effect on lean or bone mass, but decreases energy expenditure without effecting body weight or food intake. These results suggest that peripheral Y2 receptor signaling is critical in the regulation of oxidative fuel selection and physical activity and protects against the diet-induced obesity. The lack of effects on bone mass seen in this model further indicates that bone mass is primarily controlled by non-peripheral Y2 receptors. This study provides evidence that novel drugs that target peripheral rather than central Y2 receptors could provide benefits for the treatment of obesity and glucose intolerance without adverse effects on lean and bone mass, with the additional benefit of avoiding side effects often associated with pharmaceuticals that act on the central nervous system.

Original languageEnglish
Pages (from-to)2137-2148
Number of pages12
JournalObesity
Volume19
Issue number11
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Keywords

  • NEUROPEPTIDE-Y
  • NORMAL RATS
  • PARAVENTRICULAR NUCLEUS
  • METABOLIC SYNDROME
  • PHYSICAL-ACTIVITY
  • ARCUATE NUCLEUS
  • BONE-FORMATION
  • KNOCKOUT MICE
  • WEIGHT-GAIN
  • FEMALE RATS

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