To investigate the distribution of variant genotypes of Fc gamma receptor Ⅲa (FcγRⅢa) in healthy Chinese population of Zhengzhou city, genomic DNA was extracted from peripheral blood of healthy donators The genot...To investigate the distribution of variant genotypes of Fc gamma receptor Ⅲa (FcγRⅢa) in healthy Chinese population of Zhengzhou city, genomic DNA was extracted from peripheral blood of healthy donators The genotypes of FcγRⅢa-158 were determined by nested polymerase chain reaction (PCR) in 137 healthy people in Zhengzhou city The results showed that frequencies of variant genotypes FF, VV and VF were 42 3 %, 48 9 % and 8 8 % respectively The distribution of FcγRⅢa-158 in healthy Chinese population of Zhengzhou city was polymorphic and different from that of African Americans (AA) and Caucasian Americans (CA)展开更多
Objective To explore the roles of Fcγ recep tor in the pathogenesis of Graves' disease. Methods Fcγ receptor gene knockout mice(Fcγ R KO m ice) which were rooted in C57BL/6 mice and wild type C57BL/6 mice wer...Objective To explore the roles of Fcγ recep tor in the pathogenesis of Graves' disease. Methods Fcγ receptor gene knockout mice(Fcγ R KO m ice) which were rooted in C57BL/6 mice and wild type C57BL/6 mice were immunized by hTSH receptor expressing cells (DAP3.WT). 1-2×107 DAP3.WT cells were peri toneally injected into mice every two weeks for a total of six times. Two weeks after final immunization, mice were killed for measurement of total thyroxine, T RAb and pathological examination. Results The thyroxine level of the immunized Fcγ recept or gene knockout mice was significantly lower than that of the immunized wild ty pe control mice (2.2±0.31 vs. 3.32± 0.59 g·dL -1, P< 0.05 ),but there was no significant difference between immunized Fcγ R KO mic e and non-immunized wild type control group. The TRAb levels of the immunized F γ R KO mice significantly increased compared to those of the immunized wild type mice (21.75±8.21 vs. 14.11±6.21, P< 0.05). The lymphocyte cel ls infiltration and destruction of thyroid follicles were found in the thyroid gland of the immunized Fcγ R KO mice. Conclusion These results suggest that Fcγ receptor may be involved in the pathogenesis of Graves' disease.展开更多
应用两种不同的表达系统对FceR I α亚基的细胞外区进行克隆和表达,表达产物经纯化后用免疫斑点杂交法检测其与IgE结合的能力,探索IgE与其高亲和力受体FceR I α亚基的细胞外区结合的机制。结果两种体系均成功表达出FceRI α亚基的细胞...应用两种不同的表达系统对FceR I α亚基的细胞外区进行克隆和表达,表达产物经纯化后用免疫斑点杂交法检测其与IgE结合的能力,探索IgE与其高亲和力受体FceR I α亚基的细胞外区结合的机制。结果两种体系均成功表达出FceRI α亚基的细胞外区,pBAD/gⅢA表达的FceR I α亚基的细胞外区能与IgE结合,而PQE30表达的FeaR I α亚基的细胞外区不能与IgE结合。提示FccR I α亚基的细胞外区已足够和IgE结合,无需β、γ亚基的存在,其所具有的一定的空间构型和二硫键的形成在与IgE结合时是必需的,而糖基化位点在与IgE的结合时是非必需的。展开更多
文摘To investigate the distribution of variant genotypes of Fc gamma receptor Ⅲa (FcγRⅢa) in healthy Chinese population of Zhengzhou city, genomic DNA was extracted from peripheral blood of healthy donators The genotypes of FcγRⅢa-158 were determined by nested polymerase chain reaction (PCR) in 137 healthy people in Zhengzhou city The results showed that frequencies of variant genotypes FF, VV and VF were 42 3 %, 48 9 % and 8 8 % respectively The distribution of FcγRⅢa-158 in healthy Chinese population of Zhengzhou city was polymorphic and different from that of African Americans (AA) and Caucasian Americans (CA)
文摘Objective To explore the roles of Fcγ recep tor in the pathogenesis of Graves' disease. Methods Fcγ receptor gene knockout mice(Fcγ R KO m ice) which were rooted in C57BL/6 mice and wild type C57BL/6 mice were immunized by hTSH receptor expressing cells (DAP3.WT). 1-2×107 DAP3.WT cells were peri toneally injected into mice every two weeks for a total of six times. Two weeks after final immunization, mice were killed for measurement of total thyroxine, T RAb and pathological examination. Results The thyroxine level of the immunized Fcγ recept or gene knockout mice was significantly lower than that of the immunized wild ty pe control mice (2.2±0.31 vs. 3.32± 0.59 g·dL -1, P< 0.05 ),but there was no significant difference between immunized Fcγ R KO mic e and non-immunized wild type control group. The TRAb levels of the immunized F γ R KO mice significantly increased compared to those of the immunized wild type mice (21.75±8.21 vs. 14.11±6.21, P< 0.05). The lymphocyte cel ls infiltration and destruction of thyroid follicles were found in the thyroid gland of the immunized Fcγ R KO mice. Conclusion These results suggest that Fcγ receptor may be involved in the pathogenesis of Graves' disease.
文摘应用两种不同的表达系统对FceR I α亚基的细胞外区进行克隆和表达,表达产物经纯化后用免疫斑点杂交法检测其与IgE结合的能力,探索IgE与其高亲和力受体FceR I α亚基的细胞外区结合的机制。结果两种体系均成功表达出FceRI α亚基的细胞外区,pBAD/gⅢA表达的FceR I α亚基的细胞外区能与IgE结合,而PQE30表达的FeaR I α亚基的细胞外区不能与IgE结合。提示FccR I α亚基的细胞外区已足够和IgE结合,无需β、γ亚基的存在,其所具有的一定的空间构型和二硫键的形成在与IgE结合时是必需的,而糖基化位点在与IgE的结合时是非必需的。
