鼠源性乙酰胆碱受体α亚基97—116肽段(V108A)鼻黏膜耐受对实验性自身免疫性重症肌无力大鼠的影响  被引量:7

Effect of nasal tolerance with rat-derived 97-116 ( V108A ) peptide of the AChR α-subunit on experimental autoimmune myasthenia gravis

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作  者:吴怀国[1] 杨毅[1] 熊小平[1] 许文华[1] 任明山[1] 

机构地区:[1]安徽医科大学附属省立医院神经内科,合肥230001

出  处:《中华神经科杂志》2008年第2期110-113,共4页Chinese Journal of Neurology

基  金:安徽省自然科学基金资助项目(070413260X);安徽省人才开发基金资助项目(20052041);安徽省卫生厅科研基金资助项目(06B0033)

摘  要:目的 研究鼠源性乙酰胆碱受体α亚基97-116肽段丙氨酸替代108缬氨酸[Rα97—116(V108A)]鼻黏膜耐受对实验性自身免疫性重症肌无力(EAMG)大鼠肌无力表现及免疫功能的影响。方法将采用Rα07-116强化免疫接种方法成模的22只EAMG大鼠随机分成耐受组和对照组,分别经鼻黏膜给予Rα07-116(V108A)和PBS缓冲液免疫耐受处理10d后,观察不同时间点两组大鼠体质量、Lennon肌无力评分、血清AChR—ab(ELISA法)及CD28、CTLA4、B7共刺激分子(流式细胞仪)变化。结果耐受组EAMG大鼠体质量[(228.1±5.8)g]较对照组[(215.0±16.2)g]增加(t=2.395,P〈0.05);肌无力临床评分[耐受组(1.55±0.44)分,对照组(2.10±0.66)分]下降(t=-2.20,P〈0.05);血清AChR-ab(耐受组0.97±0.20,对照组1.27±0.26,t=-2.857,P〈0.05)和外周血CD28、B7-1、B7-2、CTLA4分子的表达(%)耐受组(分别为27.35±7.05、4.73±0.58、2.71±0.35、1.72±0.44)较对照组(分别为40.02±8.81、9.52±1.25、5.88±1.09、2.64±0.47)明显下调(t=3.479、10.861、8.755、4.403,均P〈0.01)。结论Re07—116(V108A)鼻黏膜耐受能明显减轻EAMG的肌无力症状,并能引起特异性T细胞活化和B细胞免疫功能抑制。Objective To study effect of nasal tolerance with rat-derived 97-116 peptide of AChR α-subunit ( ROD7-116 ( V108A ) ) on the manifestation of muscle weakness and the immunity function of experimental autoimmune myasthenia gravis (EAMG). Methods Twenty-two EAMG model Lewis rats immunized thrice with Rot97-116(V108A) were divided randomly into tolerance group and control group. They were respectively immunized with Rot97-116 (V108A) and PBS buffer solution for 10 days via nasal mucous. Then the body weight and Lennon score of two group Lewis rats were measured. Their serum anti- AChR antibodies were tested by ELISA, the expression levels of CD28, CTLA4, B7-1 and B7-2 were determined by flow cytometry. Results Compared with control group at different time points, the body weight of tolerance group rats ( tolerance group ( 228. 1±5.8 ) g, control group ( 215. 0 ± 16. 2 ) g, t = 2. 395, P 〈 0. 05 ) increased, the mean clinical score of rats ( tolerance group 1.55 ±0. 44, control group 2. 10 ± 0. 66, t = - 2. 20, P 〈 0. 05 ) decreased and the amount of serum anti-AChR antibody ( tolerance group 0. 97±0. 20,control group 1.27±0. 26, t = -2. 857 ,P 〈0.05) decreased obviously, the amount of CD2s, B7-1, B7-2 , CTLA4 (%) expressed on the surface of peripheral blood cells (tolerance group: 27.35±7.05, 4.73 ±0.58, 2.71 ±0.35, 1.72 ±0.44, control group:40.02 ±8.81, 9.52 ±1.25, 5. 88 ± 1.09, 2. 64 ± 0. 47 ) down-regulated markedly ( t = 3.479, 10. 861, 8. 755, 4. 403, all P 〈 0. 01 ). Condusion Nasal mucous tolerance with Rα97-116 (V108A)could ameliorate muscular weakness of EAMG rats while activates T cell and inhibits B cellular immunity.

关 键 词:重症肌无力 自身免疫性 实验性 鼻黏膜 免疫耐受 免疫接种 加强 

分 类 号:R686[医药卫生—骨科学]

 

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