Targeting PSD95/nNOS by ZL006 alleviates social isolation-induced heightened attack behavior in mice

Luqi Yang, Jingyu Cui,Ligong Zeng,Wen Lu

PSYCHOPHARMACOLOGY(2021)

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摘要
Rationale Deregulated attack behaviors have devastating social consequences; however, satisfactory clinical management for the behavior is still an unmet need so far. Social isolation (SI) has been common during the COVID-19 pandemic and may have detrimental effects on mental health, including eliciting heightened attack behavior. Objectives This study aims to explore whether injection of ZL006 can alleviate SI-induced escalation of attack behavior in mice. Methods Pharmacological tools, biochemical methods, and behavioral tests were used to explore the potential therapeutic effects of ZL006 targeting postsynaptic density 95 (PSD95)/neuronal nitric oxide synthase (nNOS) pathway on escalation of attack behavior induced by SI in mice. Results ZL006 mitigated SI-induced escalated attack behaviors and elevated nitric oxide (NO) level in the cortex of the SI mice. The beneficial effects of ZL006 lasted for at least 72 h after a single injection of ZL006. Potentiation of NO levels by L-arginine blocked the effects of ZL006. Moreover, a sub-effective dose of 7-NI in combination with a sub-effective dose of ZL006 decreased both SI-induced escalated attack behaviors and NO levels in mice subjected to SI. Conclusions Our study highlights the importance of the PSD95/nNOS pathway in mediating SI-induced escalation of attack behavior. ZL006 may be a promising therapeutic strategy for treating aggressive behaviors.
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关键词
Postsynaptic density 95 (PSD95), Neuronal nitric oxide synthase (nNOS), ZL006, Nitric oxide (NO), Social isolation (SI), Resident-intruder test
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