کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5815429 1556649 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deep brain stimulation, histone deacetylase inhibitors and glutamatergic drugs rescue resistance to fear extinction in a genetic mouse model
ترجمه فارسی عنوان
تحرک عمیق مغز، مهارکننده های هیستون دیاسکتیلاز و داروهای گلوتاماترگیک مقاومت در برابر ترس از انقراض در مدل موش های ژنتیکی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی

Anxiety disorders are characterized by persistent, excessive fear. Therapeutic interventions that reverse deficits in fear extinction represent a tractable approach to treating these disorders. We previously reported that 129S1/SvImJ (S1) mice show no extinction learning following normal fear conditioning. We now demonstrate that weak fear conditioning does permit fear reduction during massed extinction training in S1 mice, but reveals specific deficiency in extinction memory consolidation/retrieval. Rescue of this impaired extinction consolidation/retrieval was achieved with d-cycloserine (N-methly-d-aspartate partial agonist) or MS-275 (histone deacetylase (HDAC) inhibitor), applied after extinction training. We next examined the ability of different drugs and non-pharmacological manipulations to rescue the extreme fear extinction deficit in S1 following normal fear conditioning with the ultimate aim to produce low fear levels in extinction retrieval tests. Results showed that deep brain stimulation (DBS) by applying high frequency stimulation to the nucleus accumbens (ventral striatum) during extinction training, indeed significantly reduced fear during extinction retrieval compared to sham stimulation controls. Rescue of both impaired extinction acquisition and deficient extinction consolidation/retrieval was achieved with prior extinction training administration of valproic acid (a GABAergic enhancer and HDAC inhibitor) or AMN082 [metabotropic glutamate receptor 7 (mGlu7) agonist], while MS-275 or PEPA (AMPA receptor potentiator) failed to affect extinction acquisition in S1 mice. Collectively, these data identify potential beneficial effects of DBS and various drug treatments, including those with HDAC inhibiting or mGlu7 agonism properties, as adjuncts to overcome treatment resistance in exposure-based therapies.This article is part of a Special Issue entitled 'Cognitive Enhancers'.

► Nucleus accumbens stimulation during training rescues deficient extinction in S1. ► mGluR7 agonism or duel HDAC inhibition/GABA enhancement rescues S1 extinction. ► Weak fear conditioning permit extinction learning, not retrieval, in S1 mice. ► HDAC inhibitor, MS-275, rescues S1 extinction after weak, not strong, conditioning. ► d-cycloserine, NMDAR partial agonist, rescues S1 extinction after weak conditioning.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 64, January 2013, Pages 414-423
نویسندگان
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