bp(MESH:"Sensory Gating")
However, the atypical antipsychotic drug clozapine normalizes auditory gating in DBA/2 mice — an effect which involves an alpha7 nAChR mechanism181. PubMed:19721446
Patients with schizophrenia174 and DBA/2 mouse models180,181 respond to nicotine administration with improved sensory gating, presumably through alpha7 nAChR activation182,183. PubMed:19721446
Similarly, topisetron, a 5HT3 antagonist marketed outside the united States as an anti-nausea drug, also has efficacy as an alpha7 nAChR agonist and increases the inhibition of P50 auditory gating in schizophrenia185. PubMed:19721446
GTS-21, one of a series of compounds derived from anabaseine, an alkaloid found in marine worms, is a partial agonist of alpha7 nAChRs that improves memory-related behaviours in various paradigms and normalizes auditory gating186. it is the leading clinical candidate in the field of alpha7 nAChRs. PubMed:19721446
initially evaluated in normal subjects, GTS-21 was found to significantly improve attention and memory. in a second Phase i trial187, GTS-21 normalized P50 auditory gating in patients with schizophrenia. PubMed:19721446
in addition, a decrease in alpha7 nAChR density in the hippocampus of patients with schizophrenia has been reported177. Similarly, a low density of alpha7 nAChRs in inbred strains of mice is associated with poor gating178. Recently, the expression of a novel variant of alpha7 nAChR, CHRNA7-2 (cholinergic receptor, nicotinic, alpha7, variant 2), was found to be reduced below control levels in the prefrontal cortex of patients with schizophrenia179. PubMed:19721446
nAChRs are known to control sensory gating, and studies investigating the role of nAChRs in schizophrenia have focused primarily on alpha7 nAChRs. Sensory-gating deficits in patients with schizophrenia174 have been linked to chromosome 15q14, proximal to the alpha7 locus175,176. PubMed:19721446
nAChRs are known to control sensory gating, and studies investigating the role of nAChRs in schizophrenia have focused primarily on alpha7 nAChRs. Sensory-gating deficits in patients with schizophrenia174 have been linked to chromosome 15q14, proximal to the alpha7 locus175,176. PubMed:19721446
nAChRs are known to control sensory gating, and studies investigating the role of nAChRs in schizophrenia have focused primarily on alpha7 nAChRs. Sensory-gating deficits in patients with schizophrenia174 have been linked to chromosome 15q14, proximal to the alpha7 locus175,176. PubMed:19721446
in addition, a decrease in alpha7 nAChR density in the hippocampus of patients with schizophrenia has been reported177. Similarly, a low density of alpha7 nAChRs in inbred strains of mice is associated with poor gating178. Recently, the expression of a novel variant of alpha7 nAChR, CHRNA7-2 (cholinergic receptor, nicotinic, alpha7, variant 2), was found to be reduced below control levels in the prefrontal cortex of patients with schizophrenia179. PubMed:19721446
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