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Mouse neurexin-1α deletion causes correlated electrophysiological and behavioral changes consistent with cognitive impairments
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Mouse neurexin-1α deletion causes correlated electrophysiological and behavioral changes consistent with cognitive impairments
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Mouse neurexin-1α deletion causes correlated electrophysiological and behavioral changes consistent with cognitive impairments
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Journal Article
Mouse neurexin-1α deletion causes correlated electrophysiological and behavioral changes consistent with cognitive impairments
2009
Overview
Deletions in the neurexin-1α gene were identified in large-scale unbiased screens for copy-number variations in patients with autism or schizophrenia. To explore the underlying biology, we studied the electrophysiological and behavioral phenotype of mice lacking neurexin-1α. Hippocampal slice physiology uncovered a defect in excitatory synaptic strength in neurexin-1α deficient mice, as revealed by a decrease in miniature excitatory postsynaptic current (EPSC) frequency and in the input-output relation of evoked postsynaptic potentials. This defect was specific for excitatory synaptic transmission, because no change in inhibitory synaptic transmission was observed in the hippocampus. Behavioral studies revealed that, compared with littermate control mice, neurexin-1α deficient mice displayed a decrease in prepulse inhibition, an increase in grooming behaviors, an impairment in nest-building activity, and an improvement in motor learning. However, neurexin-1α deficient mice did not exhibit any obvious changes in social behaviors or in spatial learning. Together, these data indicate that the neurexin-1α deficiency induces a discrete neural phenotype whose extent correlates, at least in part, with impairments observed in human patients.
