Lee Kyung Jin, Shim Insop, Sung Jae Hoon, Hong Jae Taek, Kim Il Sup, Cho Chul Bum
Department of Neurosurgery, Yeoido Saint Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Acupuncture & Meridian Science Research Center, College of Oriental Medicine, Kyung Hee University, Seoul, Korea.
J Korean Neurosurg Soc. 2017 Mar;60(2):138-145. doi: 10.3340/jkns.2016.0202.020. Epub 2017 Mar 1.
High frequency stimulation (HFS) of the subthalamic nucleus (STN) is recognized as an effective treatment of advanced Parkinson's disease. However, the neurochemical basis of its effects remains unknown. The aim of this study is to investigate the effects of STN HFS in intact and 6-hydroxydopamine (6-OHDA)-lesioned hemiparkinsonian rat model on changes of principal neurotransmitters, glutamate, and gamma-aminobutyric acid (GABA) in the striatum.
The authors examined extracellular glutamate and GABA change in the striatum on sham group, 6-OHDA group, and 6-OHDA plus deep brain stimulation (DBS) group using microdialysis methods.
High-pressure liquid chromatography was used to quantify glutamate and GABA. The results show that HFS-STN induces a significant increase of extracellular glutamate and GABA in the striatum of 6-OHDA plus DBS group compared with sham and 6-OHDA group.
Therefore, the clinical results of STN-HFS are not restricted to the direct STN targets but involve widespread adaptive changes within the basal ganglia.
丘脑底核高频刺激(HFS)被认为是治疗晚期帕金森病的一种有效方法。然而,其作用的神经化学基础仍不清楚。本研究旨在探讨丘脑底核高频刺激对完整和6-羟基多巴胺(6-OHDA)损伤的偏侧帕金森病大鼠模型纹状体中主要神经递质、谷氨酸和γ-氨基丁酸(GABA)变化的影响。
作者采用微透析法检测假手术组、6-OHDA组和6-OHDA加脑深部刺激(DBS)组纹状体细胞外谷氨酸和GABA的变化。
采用高压液相色谱法定量谷氨酸和GABA。结果显示,与假手术组和6-OHDA组相比,丘脑底核高频刺激可使6-OHDA加DBS组纹状体细胞外谷氨酸和GABA显著增加。
因此,丘脑底核高频刺激的临床效果不仅限于丘脑底核的直接靶点,还涉及基底神经节内广泛的适应性变化。