期刊
NATURE NEUROSCIENCE
卷 6, 期 1, 页码 51-58出版社
NATURE AMERICA INC
DOI: 10.1038/nn992
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资金
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [F32NS010932, R01NS026920] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [F32AG005858, R01AG017499] Funding Source: NIH RePORTER
- NIA NIH HHS [F32 AG5858, R01 AG17499] Funding Source: Medline
- NINDS NIH HHS [R01 NS26920, F32 NS10932] Funding Source: Medline
Blockade of cholinergic neurotransmission by muscarinic receptor antagonists produces profound deficits in attention and memory. However, the antagonists used in previous studies bind to more than one of the five muscarinic receptor subtypes. Here we examined memory in mice with a null mutation of the gene coding the M, receptor, the most densely distributed muscarinic receptor in the hippocampus and forebrain. In contrast with previous studies using nonselective pharmacological antagonists, the M-1 receptor deletion produced a selective phenotype that included both enhancements and deficits in memory. Long-term potentiation (LTP) in response to theta burst stimulation in the hippocampus was also reduced in mutant mice. M-1 null mutant mice showed normal or enhanced memory for tasks that involved matching-to-sample problems, but they were severely impaired in nonmatching-to-sample working memory as well as consolidation. Our results suggest that the M-1 receptor is specifically involved in memory processes for which the cortex and hippocampus interact.
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