| First Author | Yang YR | Year | 2017 |
| Journal | Mol Psychiatry | Volume | 22 |
| Issue | 10 | Pages | 1473-1482 |
| PubMed ID | 28138157 | Mgi Jnum | J:263481 |
| Mgi Id | MGI:6189649 | Doi | 10.1038/mp.2016.261 |
| Citation | Yang YR, et al. (2017) Forebrain-specific ablation of phospholipase Cgamma1 causes manic-like behavior. Mol Psychiatry 22(10):1473-1482 |
| abstractText | Manic episodes are one of the major diagnostic symptoms in a spectrum of neuropsychiatric disorders that include schizophrenia, obsessive-compulsive disorder and bipolar disorder (BD). Despite a possible association between BD and the gene encoding phospholipase Cgamma1 (PLCG1), its etiological basis remains unclear. Here, we report that mice lacking phospholipase Cgamma1 (PLCgamma1) in the forebrain (Plcg1(f/f); CaMKII) exhibit hyperactivity, decreased anxiety-like behavior, reduced depressive-related behavior, hyperhedonia, hyperphagia, impaired learning and memory and exaggerated startle responses. Inhibitory transmission in hippocampal pyramidal neurons and striatal dopamine receptor D1-expressing neurons of Plcg1-deficient mice was significantly reduced. The decrease in inhibitory transmission is likely due to a reduced number of gamma-aminobutyric acid (GABA)-ergic boutons, which may result from impaired localization and/or stabilization of postsynaptic CaMKII (Ca(2+)/calmodulin-dependent protein kinase II) at inhibitory synapses. Moreover, mutant mice display impaired brain-derived neurotrophic factor-tropomyosin receptor kinase B-dependent synaptic plasticity in the hippocampus, which could account for deficits of spatial memory. Lithium and valproate, the drugs presently used to treat mania associated with BD, rescued the hyperactive phenotypes of Plcg1(f/f); CaMKII mice. These findings provide evidence that PLCgamma1 is critical for synaptic function and plasticity and that the loss of PLCgamma1 from the forebrain results in manic-like behavior. |
