Early 5-HT6 receptor blockade prevents symptom onset in a model of adolescent cannabis abuse.

Abstract:

:Cannabis abuse during adolescence confers an increased risk for developing later in life cognitive deficits reminiscent of those observed in schizophrenia, suggesting common pathological mechanisms that remain poorly characterized. In line with previous findings that revealed a role of 5-HT6 receptor-operated mTOR activation in cognitive deficits of rodent developmental models of schizophrenia, we show that chronic administration of ∆9-tetrahydrocannabinol (THC) to mice during adolescence induces a long-lasting activation of mTOR in prefrontal cortex (PFC), alterations of excitatory/inhibitory balance, intrinsic properties of layer V pyramidal neurons, and long-term depression, as well as cognitive deficits in adulthood. All are prevented by administrating a 5-HT6 receptor antagonist or rapamycin, during adolescence. In contrast, they are still present 2 weeks after the same treatments delivered at the adult stage. Collectively, these findings suggest a role of 5-HT6 receptor-operated mTOR signaling in abnormalities of cortical network wiring elicited by THC at a critical period of PFC maturation and highlight the potential of 5-HT6 receptor antagonists as early therapy to prevent cognitive symptom onset in adolescent cannabis abusers.

journal_name

EMBO Mol Med

journal_title

EMBO molecular medicine

authors

Berthoux C,Hamieh AM,Rogliardo A,Doucet EL,Coudert C,Ango F,Grychowska K,Chaumont-Dubel S,Zajdel P,Maldonado R,Bockaert J,Marin P,Bécamel C

doi

10.15252/emmm.201910605

subject

Has Abstract

pub_date

2020-05-08 00:00:00

pages

e10605

issue

5

eissn

1757-4676

issn

1757-4684

journal_volume

12

pub_type

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