期刊
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 369, 期 1633, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rstb.2013.0160
关键词
amygdala; presynaptic plasticity; adenylate cyclase; PKA; fasudil
类别
资金
- Agence Nationale pour la Recherche
- European Neuroscience Institutes Network
- Novartis Research Foundation
- National Center of Competences in Research 'SYNAPSY - The Synaptic Bases of Mental Diseases'
- Swiss National Science Foundation
- European Union's Seventh Framework Programme [241995]
- project GENCODYS
- Sanofi Aventis
Loss-of-function mutations in the gene encoding for the RhoGAP protein of oligophrenin-1 (OPHN1) lead to cognitive disabilities (CDs) in humans, yet the underlying mechanisms are not known. Here, we show that in mice constitutive lack of Ophn1 is associated with dysregulation of the cyclic adenosine monophosphate/phosphate kinase A (cAMP/PKA) signalling pathway in a brain-area-specific manner. Consistent with a key role of cAMP/PKA signalling in regulating presynaptic function and plasticity, we found that PKA-dependent presynaptic plasticity was completely abolished in affected brain regions, including hippocampus and amygdala. At the behavioural level, lack of OPHN1 resulted in hippocampus-and amygdala-related learning disabilities which could be fully rescued by the ROCK/PKA kinase inhibitor fasudil. Together, our data identify OPHN1 as a key regulator of presynaptic function and suggest that, in addition to reported postsynaptic deficits, loss of presynaptic plasticity contributes to the pathophysiology of CDs.
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