Document Detail


Mice lacking melanin-concentrating hormone are hypophagic and lean.
MedLine Citation:
PMID:  9872314     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Feeding is influenced by hypothalamic neuropeptides that promote (orexigenic peptides) or inhibit feeding. Of these, neuropeptide Y (NPY) in the arcuate nucleus and melanin-concentrating hormone (MCH) and orexins/hypocretins in the lateral hypothalamus have received attention because their expression is increased during fasting and because they promote feeding when administered centrally. Surprisingly, absence of the orexigenic neuropeptide NPY fails to alter feeding or body weight in normal mice. As deficiency of a single component of the pathway that limits food intake (such as leptin or receptors for melanocortin-4) causes obesity, it has been suggested that orexigenic signals are more redundant than those limiting food intake. To define further the physiological role of MCH and to test the redundancy of orexigenic signals, we generated mice carrying a targeted deletion of the MCH gene. MCH-deficient mice have reduced body weight and leanness due to hypophagia (reduced feeding) and an inappropriately increased metabolic rate, despite their reduced amounts of both leptin and arcuate nucleus pro-opiomelanocortin messenger RNA. Our results show that MCH is a critical regulator of feeding and energy balance which acts downstream of leptin and the melanocortin system, and that deletion of a gene encoding a single orexigenic peptide can result in leanness.
Authors:
M Shimada; N A Tritos; B B Lowell; J S Flier; E Maratos-Flier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Nature     Volume:  396     ISSN:  0028-0836     ISO Abbreviation:  Nature     Publication Date:  1998 Dec 
Date Detail:
Created Date:  1999-01-19     Completed Date:  1999-01-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0410462     Medline TA:  Nature     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  670-4     Citation Subset:  IM    
Affiliation:
Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cell Line
Eating*
Energy Intake
Energy Metabolism
Food Deprivation
Gene Deletion
Hypothalamic Hormones / deficiency,  genetics,  physiology*
Hypothalamus / metabolism
Leptin
Melanins / deficiency,  genetics,  physiology*
Mice
Mice, Inbred C57BL
Neuropeptides / genetics,  metabolism
Pituitary Hormones / deficiency,  genetics,  physiology*
Proteins / metabolism
RNA, Messenger / metabolism
Stem Cells
Thinness*
Chemical
Reg. No./Substance:
0/Hypothalamic Hormones; 0/Leptin; 0/Melanins; 0/Neuropeptides; 0/Pituitary Hormones; 0/Proteins; 0/RNA, Messenger; 67382-96-1/melanin-concentrating hormone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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