Document Detail


Learning performances, brain NGF distribution and NPY levels in transgenic mice expressing TNF-alpha.
MedLine Citation:
PMID:  10862948     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Tumor necrosis factor-alpha (TNF-alpha) is a cytokine involved in a variety of neurobiological activities including changing behavior and regulation of both neurotrophin and neuropeptide levels. In this study we used two lines of transgenic mice overexpressing brain TNF-alpha characterized by neurological deficits (line Tg6074) or phenotypically normal (line TgK3). We analyzed whether or not impairments in learning and memory processes due to TNF-alpha overexpression were associated with changes in endogenous brain NGF, NPY and beta-amyloid. The results indicate that full TNF-alpha transgene expression disrupted the learning capabilities of transgenic mice (both Tg6074 and TgK3). NGF decreased in the hippocampus of both transgenic mice whereas hippocampal NPY slightly potentiated in Tg6074. The decrease in NGF is correlated with deficits in spatial learning and memory whereas inflammation in the brain of Tg6074 could be responsible of the hippocampal increase in NPY. As a whole, these results show that transgenic mice overexpressing TNF-alpha in the brain represent a useful model for studying neuronal degeneration and brain inflammatory processes.
Authors:
M Fiore; F Angelucci; E Alleva; I Branchi; L Probert; L Aloe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Behavioural brain research     Volume:  112     ISSN:  0166-4328     ISO Abbreviation:  Behav. Brain Res.     Publication Date:  2000 Jul 
Date Detail:
Created Date:  2000-07-20     Completed Date:  2000-07-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8004872     Medline TA:  Behav Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  165-75     Citation Subset:  IM    
Affiliation:
Institute of Neurobiology, CNR, viale Marx, 15, 00137, Rome, Italy.
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MeSH Terms
Descriptor/Qualifier:
Amyloid beta-Protein / metabolism*
Animals
Disease Models, Animal
Female
Gene Expression
Hippocampus / metabolism*
Immunohistochemistry
Male
Maze Learning / physiology*
Memory / physiology*
Mice
Mice, Transgenic
Nerve Growth Factor / metabolism*
Neurodegenerative Diseases / metabolism,  physiopathology*
Neuropeptide Y / metabolism*
Radioimmunoassay
Swimming
Tumor Necrosis Factor-alpha / metabolism*
Chemical
Reg. No./Substance:
0/Amyloid beta-Protein; 0/Neuropeptide Y; 0/Tumor Necrosis Factor-alpha; 9061-61-4/Nerve Growth Factor

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


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