Objective: This study was designed to explore the diagnosis on Down syndrome by fluorescence in situ hybridization (FISH). Methods: We detected trisomy 21 with Down syndrome cristical region cosmid DNA probe, which co...
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Objective: This study was designed to explore the diagnosis on Down syndrome by fluorescence in situ hybridization (FISH). Methods: We detected trisomy 21 with Down syndrome cristical region cosmid DNA probe, which comes from specific KU21D library of chromosome 21 (carrier is 6.7 kb, insert sequence is 35 kb) and is located in 21q22.2. 48 cases of trisomy 21 were detected on cultured and uncultured lymphoblastoid cell by FISH. Results: There were three hybridization points in interphase nuclei and three hybridization signals on metaphase three chromosome 21. Hybridization rate was 81%～95%. Conclusion: Trisomy 21 could be diagnosed rapidly and accurately by DSCR Cosmid DNA probe in uncultured lymphoblastoid interphase unclei of patients.
多发性硬化(multiple sclerosis,MS)是一种慢性进行性自身免疫性疾病,其主要病理特征表现为以累及脑白质区域为主的中枢神经系统的炎性脱髓鞘以及中枢神经系统周围小血管炎性浸润。实验性自身免疫性脑脊髓炎(experimental autoimmune encephalomyelitis,EAE)是MS研究中最常用的动物模型。目前认为MS主要由CD4+T细胞介导,辅助性T细胞(helper T cell,Th)1和Th17在MS发病机制中起关键作用。但近年来多种研究表明CD8+T细胞、自然杀伤T细胞(natural killer T cell,NKT)和γδT细胞等T细胞亚群在该疾病中也起着非常重要的作用。文章对不同T细胞亚群在MS及EAE中研究的最新进展进行综述。
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