PPARγ mrna in the adult mouse hypothalamus

Distribution and regulation in response to dietary challenges

Yang Liu, Ying Huang, Syann Lee, Angie L. Bookout, Carlos M. Castorena, Hua Wu, Laurent Gautron

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Peroxisome proliferator-activated receptor gamma (PPARy) is a ligand-activated transcription factor that was originally identified as a regulator of peroxisome proliferation and adipocyte differentiation. Emerging evidence suggests that functional PPARy signaling also occurs within the hypothalamus. However, the exact distribution and identities of PPARy-expressing hypothalamic cells remains under debate. The present study systematically mapped PPARy mRNA expression in the adult mouse brain using in situ hybridization histochemistry. PPARy mRNA was found to be expressed at high levels outside the hypothalamus including the neocortex, the olfactory bulb, the organ of the vasculosum of the lamina terminalis (VOLT), and the subfornical organ. Within the hypothalamus, PPARy was present at moderate levels in the suprachiasmatic nucleus (SCh) and the ependymal of the 3rd ventricle. In all examined feeding-related hypothalamic nuclei, PPARy was expressed at very low levels that were close to the limit of detection. Using qPCR techniques, we demonstrated that PPARy mRNA expression was upregulated in the SCh in response to fasting. Double in situ hybridization further demonstrated that PPARy was primarily expressed in neurons rather than glia. Collectively, our observations provide a comprehensive map of PPARy distribution in the intact adult mouse hypothalamus.

Original languageEnglish (US)
Article number120
JournalFrontiers in Neuroanatomy
Volume9
Issue numberseptember
DOIs
StatePublished - Sep 3 2015

Fingerprint

Peroxisome Proliferator-Activated Receptors
Hypothalamus
Suprachiasmatic Nucleus
Messenger RNA
In Situ Hybridization
Subfornical Organ
Third Ventricle
Peroxisomes
PPAR gamma
Olfactory Bulb
Neocortex
Adipocytes
Neuroglia
Limit of Detection
Fasting
Transcription Factors
Ligands
Neurons
Brain

Keywords

  • Confocal laser scanning microscopy
  • Hypothalamus
  • In situ hybridization
  • Mouse brain
  • Transcription factors

ASJC Scopus subject areas

  • Anatomy
  • Neuroscience (miscellaneous)
  • Cellular and Molecular Neuroscience

Cite this

PPARγ mrna in the adult mouse hypothalamus : Distribution and regulation in response to dietary challenges. / Liu, Yang; Huang, Ying; Lee, Syann; Bookout, Angie L.; Castorena, Carlos M.; Wu, Hua; Gautron, Laurent.

In: Frontiers in Neuroanatomy, Vol. 9, No. september, 120, 03.09.2015.

Research output: Contribution to journalArticle

Liu, Yang ; Huang, Ying ; Lee, Syann ; Bookout, Angie L. ; Castorena, Carlos M. ; Wu, Hua ; Gautron, Laurent. / PPARγ mrna in the adult mouse hypothalamus : Distribution and regulation in response to dietary challenges. In: Frontiers in Neuroanatomy. 2015 ; Vol. 9, No. september.
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