Journal article

Gene expression analysis in the parvalbumin-immunoreactive PV1 nucleus of the mouse lateral hypothalamus

  • Girard, Franck Division of Anatomy and Program in Neuroscience, Université de Fribourg, Switzerland
  • Mészár, Zoltán Division of Anatomy and Program in Neuroscience, Université de Fribourg, Switzerland
  • Marti, Christiane Division of Anatomy and Program in Neuroscience, Université de Fribourg, Switzerland
  • Davis, F. P. Janelia Farm Research Campus, Howard Hughes Medical Institute, Ashburn, USA
  • Celio, Marco R. Division of Anatomy and Program in Neuroscience, Université de Fribourg, Switzerland
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    27.10.2011
Published in:
  • European Journal of Neuroscience. - 2011, vol. 34, no. 12, p. 1934–1943
English A solitary, elongated cluster of parvalbumin-immunoreactive neurons has been previously observed in the rodent ventrolateral hypothalamus. However, the function of this so-called PV1 nucleus is unknown. In this article, we report the results of an unbiased, broad and in-depth molecular characterization of this small, compact group of neurons. The Allen Brain Atlas database of in situ hybridization was screened in order to identify genes expressed in the PV1-nucleus-containing area of the hypothalamus, and those that might be co-expressed with parvalbumin. Although GABA is the principal neurotransmitter in parvalbumin-expressing cells in various other brain areas, we found that PV1 neurons express the vesicular glutamate transporter (VGlut) VGlut2-encoding gene Slc17a6 and are negative for the glutamic acid decarboxylase 1 (GAD1) gene. These cells also express the mRNA for the neuropeptides Adcyap1 and possibly Nxph4, express several types of potassium and sodium channels, are under the control of the neurotransmitter acetylcholine, bear receptors for the glial-derived neurotrophic factor, and produce an extracellular matrix rich in osteopontin. The PV1 nucleus is thus composed of glutamatergic nerve cells, expressing some typical markers of long-axon, projecting neurons (e.g. VGlut2), but also co-expressing genes typical of short-axon GABA neurons (e.g. a variety of potassium channels). Hence, neurons of the PV1 nucleus combine physiological characteristics of interneurons with those of projection neurons.
Faculty
Faculté des sciences et de médecine
Department
Département de Médecine
Language
  • English
Classification
Biology
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/302248
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