Npy deletion in an alcohol non-preferring rat model elicits differential effects on alcohol consumption and body weight

Bin Qiu, Richard L. Bell, Yong Cao, Lingling Zhang, Robert B. Stewart, Tamara Graves, Lawrence Lumeng, Weidong Yong, Tiebing Liang

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Neuropeptide Y (NPY) is widely expressed in the central nervous system and influences many physiological processes. It is located within the rat quantitative trait locus (QTL) for alcohol preference on chromosome 4. Alcohol-nonpreferring (NP) rats consume very little alcohol, but have significantly higher NPY expression in the brain than alcohol-preferring (P) rats. We capitalized on this phenotypic difference by creating an Npy knockout (KO) rat using the inbred NP background to evaluate NPY effects on alcohol consumption. Zinc finger nuclease (ZNF) technology was applied, resulting in a 26-bp deletion in the Npy gene. RT-PCR, Western blotting and immunohistochemistry confirmed the absence of Npy mRNA and protein in KO rats. Alcohol consumption was increased in Npy+/− but not Npy−/− rats, while Npy−/− rats displayed significantly lower body weight when compared to Npy+/+ rats. In whole brain tissue, expression levels of Npy-related and other alcohol-associated genes, Npy1r, Npy2r, Npy5r, Agrp, Mc3r, Mc4r, Crh and Crh1r, were significantly greater in Npy−/− rats, whereas Pomc and Crhr2 expressions were highest in Npy+/− rats. These findings suggest that the NPY-system works in close coordination with the melanocortin (MC) and corticotropin-releasing hormone (CRH) systems to modulate alcohol intake and body weight.

Original languageEnglish (US)
Pages (from-to)421-430
Number of pages10
JournalJournal of Genetics and Genomics
Volume43
Issue number7
DOIs
StatePublished - Jul 20 2016

Keywords

  • Alcohol drinking behavior
  • BDNF
  • CRH and receptors
  • Knockout rat
  • Melanocortin and receptors
  • NPY and receptors

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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