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《Acupuncture Research》 2005-01
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Convergence of Information from Electroacupuncture of “Sibai”(ST 2) and Gastric Distention on Rat Nucleus of the Solitary Tract Shown by c-fos Expression

LI Jiang-shan, CHANG Xiao-rong, YAN Jie, LIU Jian-hua, LIU Yu-qun (Dept. of Acu-moxibustion and Massage, Hunan College of TCM, Changsha, 410007)  
Objective: To observe the relationship among Nucleus of the Solitary Tract (NTS), “Sibai” (ST 2) and stomach in the rat. Methods: Thirty-two SD rats were randomized into normal control group, “Sibai” group, non-acupoint (0.5 cm beside ST-2) group and gastric-distention group with 8 cases being in each group. EA (4 Hz, 50 Hz, 20 V) was applied to “Sibai” (ST 2) and non-acupoint for 20 min. Gastric distention was conducted for 20 min by using a balloon filled with 5 mL of normal saline. The sections of medulla oblongata tissues containing NTS were stained with immunohistochemical technique (ABC method) for displaying expression of c-fos. Results: Microscopic observation showed that fos-like immunoreaction (IR) positive cells mainly presented in medial subnucleus of NTS (mnTS), middle and caudal medulla oblongata. The IR-positive cells of mnTS in normal control, “Sibai”, non-acupoint and gastric-distention groups were 5.50 ±2.30, 32.03±7.35, 14.76±3.06 and 31.03±3.60 respectively. The IR-positive cells of “Sibai”, non-acupoint and gastric-distention groups were significantly more than those of normal control group (P0.01), those of “Sibai” group were significantly more than those of non-acupoint group; and no significant difference was found between “Sibai” and gastric distention groups (P0.05). Conclusion: Results display that the sensatory information from EA of “Sibai” (ST 2) and gastric distention may converge on NTS, suggesting a relatively specific connection between Sibai and stomach.
【Fund】: 国家自然科学基金青年基金项目 (No .3 0 2 0 0 3 5 6);; 国家中医药管理局资助项目 (No.0 2 -0 3JT3 1)
【CateGory Index】: R245
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