کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5815657 1115524 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prenatal exposure to valproic acid increases the neural progenitor cell pool and induces macrocephaly in rat brain via a mechanism involving the GSK-3β/β-catenin pathway
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Prenatal exposure to valproic acid increases the neural progenitor cell pool and induces macrocephaly in rat brain via a mechanism involving the GSK-3β/β-catenin pathway
چکیده انگلیسی

Autism is a spectrum of neurodevelopmental disorders characterized by social isolation and lack of interaction. Anatomically, autism patients often show macrocephaly and high neuronal density. To investigate the mechanism underlying the higher neuronal populations seen in ASD, we subcutaneously injected VPA (400 mg/kg) into pregnant Sprague-Dawley rats on E12, an animal model often used in ASD study. Alternatively, cultured rat neural progenitor cells were treated with VPA. Until E18, VPA induced NPC proliferation and delayed neurogenesis in fetal brain, but the subsequent differentiation of NPCs to neurons increased brain neuronal density afterward. Similar findings were observed with NPCs treated with VPA in vitro. At a molecular level, VPA enhanced Wnt1 expression and activated the GSK-3β/β-catenin pathway. Furthermore, inhibition of this pathway attenuated the effects of VPA. The findings of this study suggest that an altered developmental process underlies the macrocephaly and abnormal brain structure observed in the autistic brain.

► Prenatally valproate exposed-rats showed autistic behaviors along with macrocephaly. ► Valproate exposure increased proliferation of neural progenitor cells (NPCs). ► Increased proliferation of NPCs led to excessive neuronal differentiation. ► Activation of Wnt1 pathway mediated the effects of valproate on neural development.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 63, Issue 6, November 2012, Pages 1028-1041
نویسندگان
, , , , , , , , , , , ,