کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10508970 948860 2014 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adolescent and adult rat cortical protein kinase A display divergent responses to acute ethanol exposure
ترجمه فارسی عنوان
پاسخ کیناز پروتئین کورتیکال در بزرگسالان و بزرگسالان پاسخ های متفاوتی را نشان می دهد که قرار گرفتن در معرض اتانول حاد
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی
Adolescent rats display reduced sensitivity to many dysphoria-related effects of alcohol (ethanol) including motor ataxia and sedative hypnosis, but the underlying neurobiological factors that contribute to these differences remain unknown. The cyclic adenosine monophosphate (cAMP)-dependent protein kinase A (PKA) pathway, particularly the type II regulatory subunit (RII), has been implicated in ethanol-induced molecular and behavioral responses in adults. Therefore, the current study examined cerebral cortical PKA in adolescent and adult ethanol responses. With the exception of early adolescence, PKA RIIα and RIIβ subunit levels largely did not differ from adult levels in either whole cell lysate or P2 synaptosomal expression. However, following acute ethanol exposure, PKA RIIβ P2 synaptosomal expression and activity were increased in adults, but not in adolescents. Behaviorally, intracerebroventricular administration of the PKA activator Sp-cAMP and inhibitor Rp-cAMP prior to ethanol administration increased adolescent sensitivity to the sedative-hypnotic effects of ethanol compared to controls. Sp-cAMP was ineffective in adults whereas Rp-cAMP suggestively reduced loss of righting reflex (LORR) with paralleled increases in blood ethanol concentrations. Overall, these data suggest that PKA activity modulates the sedative/hypnotic effects of ethanol and may potentially play a wider role in the differential ethanol responses observed between adolescents and adults.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Alcohol - Volume 48, Issue 5, August 2014, Pages 463-470
نویسندگان
, , , ,