Abstract：
:Adolescence represents a vulnerable period for the psychiatric consequences of delta9-tetrahydrocannabinol (Δ⁸-THC) exposure, however, the molecular underpinnings of this vulnerability remain to be established. Histone modifications are emerging as important epigenetic mechanisms involved in the etiopathogenesis of psychiatric diseases, thus, we investigated the impact of chronic Δ⁸-THC exposure on histone modifications in different brain areas of female rats. We checked histone modifications associated to both transcriptional repression (H3K9 di- and tri-methylation, H3K27 tri-methylation) and activation (H3K9 and H3K14 acetylation) after adolescent and adult chronic Δ⁸-THC exposure in the hippocampus, nucleus accumbens, and amygdala. Chronic exposure to increasing doses of Δ⁸-THC for 11 days affected histone modifications in a region- and age-specific manner. The primary effect in the adolescent brain was represented by changes leading to transcriptional repression, whereas the one observed after adult treatment led to transcriptional activation. Moreover, only in the adolescent brain, the primary effect was followed by a homeostatic response to counterbalance the Δ⁸-THC-induced repressive effect, except in the amygdala. The presence of a more complex response in the adolescent brain may be part of the mechanisms that make the adolescent brain vulnerable to Δ⁸-THC adverse effects.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Prini P,Penna F,Sciuccati E,Alberio T,Rubino Tdoi
10.3390/ijms18102094subject
Has Abstractpub_date
2017-10-04 00:00:00issue
10issn
1422-0067pii
ijms18102094journal_volume
18pub_type
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