期刊
MOLECULAR PHARMACOLOGY
卷 80, 期 4, 页码 747-758出版社
AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS
DOI: 10.1124/mol.111.073734
关键词
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资金
- National Institutes of Health National Center for Research Resources [P20-RR016741, P20-RR017699]
- National Heart, Lung and Blood Institute [R01-HL61438, R01-HL098279]
- National Science Foundation (NSF) North Dakota [EPS-0814442]
- NSF [0347259, 0639227, 0851869]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [0347259] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [0639227, 1359243] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [0851869] Funding Source: National Science Foundation
The role of alpha(1)-adrenergic receptors (alpha(1)ARs) in cognition and mood is controversial, probably as a result of past use of nonselective agents. alpha(1A)AR activation was recently shown to increase neurogenesis, which is linked to cognition and mood. We studied the effects of long-term alpha(1A)AR stimulation using transgenic mice engineered to express a constitutively active mutant (CAM) form of the alpha(1A)AR. CAM-alpha(1A)AR mice showed enhancements in several behavioral models of learning and memory. In contrast, mice that have the alpha(1A)AR gene knocked out displayed poor cognitive function. Hippocampal brain slices from CAM-alpha(1A)AR mice demonstrated increased basal synaptic transmission, paired-pulse facilitation, and long-term potentiation compared with wild-type (WT) mice. WT mice treated with the alpha(1A)AR-selective agonist cirazoline also showed enhanced cognitive functions. In addition, CAM-alpha(1A)AR mice exhibited antidepressant and less anxious phenotypes in several behavioral tests compared with WT mice. Furthermore, the lifespan of CAM-alpha(1A)AR mice was 10% longer than that of WT mice. Our results suggest that long-term alpha(1A)AR stimulation improves synaptic plasticity, cognitive function, mood, and longevity. This may afford a potential therapeutic target for counteracting the decline in cognitive function and mood associated with aging and neurological disorders.
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