rdf:type |
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lifeskim:mentions |
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pubmed:issue |
12
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pubmed:dateCreated |
2005-12-21
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pubmed:abstractText |
A mutation in the Contactin-1 gene results in an ataxic and anorectic phenotype that is apparent by postnatal day 10 and lethal by postnatal day 19 [Berglund et al. (1999) Neuron 24, 739-750]. The resemblance of this phenotype with the anorexia (anx/anx) mouse mutation prompted us to investigate the hypothalamic neurochemistry of Contactin knock-out (KO) mice. Contactin was expressed in the hypothalamic neuropil of wild-type (WT) but not Contactin KO mice. In the KO condition, neuropeptide Y (NPY) and agouti-related protein (AgRP) immunoreactivity (IR) accumulated in the somata of arcuate nucleus neurons, whereas IR for these neuropeptides as well as for alpha-melanocyte-stimulating hormone (alpha-MSH) decreased in the corresponding axon projections. These changes in the pattern of neuropeptide expression in the Contactin-deficient hypothalamus were similar but more pronounced than those found in anx/anx mice. Increased levels of NPY and AgRP and decreased concentrations of pro-opiomelanocortin mRNA in arcuate neurons accompanied these changes. In relating these alterations a 24-h food deprivation period, we observed in 3-week-old WT mice an elevation of NPY- and AgRP-IR in the perikarya of arcuate neurons without notable reduction of NPY- or AgRP-IR in nerve fibers, suggesting that the decrease of arcuate projections can be associated with postnatal anorectic phenotype. Our data implicate Contactin in the postnatal development of the NPY/AgRP and alpha-MSH arcuate neurons and suggest that similar to anx/anx mutant mice, compromised orexigenic signaling via NPY/AgRP neurons may contribute to reduced food intake by the Contactin-mutant animals.
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pubmed:grant |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Agouti-Related Protein,
http://linkedlifedata.com/resource/pubmed/chemical/Agrp protein, mouse,
http://linkedlifedata.com/resource/pubmed/chemical/Cell Adhesion Molecules, Neuronal,
http://linkedlifedata.com/resource/pubmed/chemical/Cntn1 protein, mouse,
http://linkedlifedata.com/resource/pubmed/chemical/Contactin 1,
http://linkedlifedata.com/resource/pubmed/chemical/Contactins,
http://linkedlifedata.com/resource/pubmed/chemical/Hypothalamic Hormones,
http://linkedlifedata.com/resource/pubmed/chemical/Intercellular Signaling Peptides...,
http://linkedlifedata.com/resource/pubmed/chemical/Melanins,
http://linkedlifedata.com/resource/pubmed/chemical/Neuropeptide Y,
http://linkedlifedata.com/resource/pubmed/chemical/Pituitary Hormones,
http://linkedlifedata.com/resource/pubmed/chemical/Pro-Opiomelanocortin,
http://linkedlifedata.com/resource/pubmed/chemical/Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/RNA, Messenger,
http://linkedlifedata.com/resource/pubmed/chemical/alpha-MSH,
http://linkedlifedata.com/resource/pubmed/chemical/melanin-concentrating hormone
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pubmed:status |
MEDLINE
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pubmed:month |
Dec
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pubmed:issn |
0953-816X
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
22
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
3217-28
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pubmed:dateRevised |
2011-8-3
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pubmed:meshHeading |
pubmed-meshheading:16367788-Agouti-Related Protein,
pubmed-meshheading:16367788-Animals,
pubmed-meshheading:16367788-Anorexia,
pubmed-meshheading:16367788-Arcuate Nucleus,
pubmed-meshheading:16367788-Cell Adhesion Molecules, Neuronal,
pubmed-meshheading:16367788-Contactin 1,
pubmed-meshheading:16367788-Contactins,
pubmed-meshheading:16367788-Food Deprivation,
pubmed-meshheading:16367788-Gene Expression Regulation,
pubmed-meshheading:16367788-Hypothalamic Hormones,
pubmed-meshheading:16367788-Immunohistochemistry,
pubmed-meshheading:16367788-In Situ Hybridization,
pubmed-meshheading:16367788-Intercellular Signaling Peptides and Proteins,
pubmed-meshheading:16367788-Melanins,
pubmed-meshheading:16367788-Mice,
pubmed-meshheading:16367788-Mice, Knockout,
pubmed-meshheading:16367788-Neuropeptide Y,
pubmed-meshheading:16367788-Pituitary Hormones,
pubmed-meshheading:16367788-Pro-Opiomelanocortin,
pubmed-meshheading:16367788-Proteins,
pubmed-meshheading:16367788-RNA, Messenger,
pubmed-meshheading:16367788-Reverse Transcriptase Polymerase Chain Reaction,
pubmed-meshheading:16367788-alpha-MSH
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pubmed:year |
2005
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pubmed:articleTitle |
Alterations of arcuate nucleus neuropeptidergic development in contactin-deficient mice: comparison with anorexia and food-deprived mice.
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pubmed:affiliation |
Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden. Serguei.Fetissov@univ-rouen.fr
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pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
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