Decreased number of parvalbumin and cholinergic interneurons in the striatum of individuals with Tourette syndrome.

Decreased number of parvalbumin and cholinergic interneurons in the striatum of individuals with Tourette syndrome.
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DOI:
10.1002/cne.22206
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发表时间:
2010-02-01
期刊:
The Journal of comparative neurology
影响因子:
--
通讯作者:
Vaccarino FM
Vaccarino FM
中科院分区:
其他
文献类型:
--
作者:
Kataoka Y;Kalanithi PS;Grantz H;Schwartz ML;Saper C;Leckman JF;Vaccarino FM

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皮质基底节神经元群将自动运动技能纳入自愿控制,并将其整合到持续的运动行为中。尾状核 (Cd) 核体积减少 5% 是抽动秽语综合征 (TS) 患者大脑中最一致的结构发现,但造成这种体积减少的细胞异常尚不清楚。在本文中,通过无偏见的体视学分析,与正常对照(NC)相比,评估了 5 名 TS 受试者死后大脑中纹状体中不同类型的中间神经元和中型棘神经元(MSN)的密度。 TS 患者的 Cd 和壳核 (Pt) 中的小清蛋白 (PV)+ 和胆碱乙酰转移酶 (ChAT)+ 胆碱能中间神经元均减少 50-60%。 TS 患者的联想区和感觉运动区的胆碱能中间神经元减少,但纹状体边缘区的胆碱能中间神经元没有减少,因此胆碱能细胞密度的正常梯度(联想区最高,感觉运动区中间,边缘区最低)被消除。中等大小的钙视网膜蛋白 (CR)+ 中间神经元、MSN 和总神经元的密度不存在显着差异。 TS 受试者中 PV+ 和胆碱能纹状体中间神经元的选择性缺陷可能导致 TS 中皮质/丘脑对纹状体神经元放电的控制受损。
Cortico-basal ganglia neuronal ensembles bring automatic motor skills into voluntary control and integrate them into ongoing motor behavior. A 5% decrease in caudate (Cd) nucleus volume is the most consistent structural finding in the brain of patients with Tourette syndrome (TS), but the cellular abnormalities that underlie this decrease in volume are unclear. In this paper, the density of different types of interneurons and medium spiny neurons (MSNs) in the striatum was assessed in the postmortem brains of 5 TS subjects as compared with normal controls (NC) by unbiased stereological analyses. TS patients demonstrated a 50-60% decrease of both parvalbumin (PV)+ and choline acetyltransferase (ChAT)+ cholinergic interneurons in the Cd and the putamen (Pt). Cholinergic interneurons were decreased in TS patients in the associative and sensorimotor regions but not in the limbic regions of the striatum, such that the normal gradient in density of cholinergic cells (highest in associative regions, intermediate in sensorimotor and lowest in limbic regions) was abolished. No significant difference was present in the densities of medium-sized calretinin (CR)+ interneurons, MSNs and total neurons. The selective deficit of PV+ and cholinergic striatal interneurons in TS subjects may result in an impaired cortico/thalamic control of striatal neuron firing in TS.
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