目的:研究HLA-C(histocompatibility complex class C)和PDCD1(programmed cell death 1)在银屑病患者骨髓CD34^+细胞中的表达,以揭示银屑病患者造血干细胞的活性。方法:采用免疫磁珠法分离CD34^+细胞,RT-PCR法分别检测HLA-C、PDCD1的m...目的:研究HLA-C(histocompatibility complex class C)和PDCD1(programmed cell death 1)在银屑病患者骨髓CD34^+细胞中的表达,以揭示银屑病患者造血干细胞的活性。方法:采用免疫磁珠法分离CD34^+细胞,RT-PCR法分别检测HLA-C、PDCD1的mRNA表达。结果:银屑病患者骨髓CD34^+细胞HLA-CmRNA表达水平高于正常对照组(P<0.05),PDCD1 mRNA表达在银屑病组与正常对照组间比较无统计学意义(P>0.05),未发现HLA-C mRNA表达水平与银屑病皮损面积和疾病活动性指数(PASI)评分有直线相关性。结论:影响CD34^+细胞发育分化的某些基因在银屑病患者骨髓CD34^+细胞中表达异常,这些基因表达水平的异常可能引起骨髓造血干细胞活性异常,并参与银屑病的发病。展开更多
目的探讨程序性细胞死亡受体1( programmed cell death 1,PDCD1)基因多态性与结直肠癌的发生发展的关联性。方法应用聚合酶链反应-限制性片段长度多态性(PCR-restriction fragment length polymorphism, PCR-RFLP)方法对426例结直...目的探讨程序性细胞死亡受体1( programmed cell death 1,PDCD1)基因多态性与结直肠癌的发生发展的关联性。方法应用聚合酶链反应-限制性片段长度多态性(PCR-restriction fragment length polymorphism, PCR-RFLP)方法对426例结直肠癌患者及500名正常个体的rs36084323、rs11568821、rs2227981、rs2227982和rs10204525位点进行多态性分析。结果rs36084323位点G等位基因在显性遗传模型下与TNM分期进展期结直肠癌的发生正关联(OR=1.59,95%CI:1.02~2.48)。rs36084323、rs11568821、rs2227981、rs2227982和rs10204525位点组成的单倍型G-G-C-T-A和A-G-C-C-G与结直肠癌的发生负关联。结论PDCD1基因rs36084323位点AG和GG基因型与TNM分期进展期的结直肠癌存在正关联。而G-G-C-T-A和A-G-C-C-G单倍型与结直肠癌的发生负关联。展开更多
Dear Editor,Programmed cell death protein 1(PD-1;encoded by the PDCD1 gene),mostly expressed on activated T cells,is an important receptor in T-cell immunity.1–3 Together with programmed deathligand 1(PD-L1:encoded b...Dear Editor,Programmed cell death protein 1(PD-1;encoded by the PDCD1 gene),mostly expressed on activated T cells,is an important receptor in T-cell immunity.1–3 Together with programmed deathligand 1(PD-L1:encoded by the CD274 gene)PD-1 acts as an inhibitor of T cell activity under normal conditions.展开更多
文摘目的:研究HLA-C(histocompatibility complex class C)和PDCD1(programmed cell death 1)在银屑病患者骨髓CD34^+细胞中的表达,以揭示银屑病患者造血干细胞的活性。方法:采用免疫磁珠法分离CD34^+细胞,RT-PCR法分别检测HLA-C、PDCD1的mRNA表达。结果:银屑病患者骨髓CD34^+细胞HLA-CmRNA表达水平高于正常对照组(P<0.05),PDCD1 mRNA表达在银屑病组与正常对照组间比较无统计学意义(P>0.05),未发现HLA-C mRNA表达水平与银屑病皮损面积和疾病活动性指数(PASI)评分有直线相关性。结论:影响CD34^+细胞发育分化的某些基因在银屑病患者骨髓CD34^+细胞中表达异常,这些基因表达水平的异常可能引起骨髓造血干细胞活性异常,并参与银屑病的发病。
文摘目的探讨程序性细胞死亡受体1( programmed cell death 1,PDCD1)基因多态性与结直肠癌的发生发展的关联性。方法应用聚合酶链反应-限制性片段长度多态性(PCR-restriction fragment length polymorphism, PCR-RFLP)方法对426例结直肠癌患者及500名正常个体的rs36084323、rs11568821、rs2227981、rs2227982和rs10204525位点进行多态性分析。结果rs36084323位点G等位基因在显性遗传模型下与TNM分期进展期结直肠癌的发生正关联(OR=1.59,95%CI:1.02~2.48)。rs36084323、rs11568821、rs2227981、rs2227982和rs10204525位点组成的单倍型G-G-C-T-A和A-G-C-C-G与结直肠癌的发生负关联。结论PDCD1基因rs36084323位点AG和GG基因型与TNM分期进展期的结直肠癌存在正关联。而G-G-C-T-A和A-G-C-C-G单倍型与结直肠癌的发生负关联。
基金This work was supported by the R35CA197706 grant from the National Institutes of Health to CMC。
文摘Dear Editor,Programmed cell death protein 1(PD-1;encoded by the PDCD1 gene),mostly expressed on activated T cells,is an important receptor in T-cell immunity.1–3 Together with programmed deathligand 1(PD-L1:encoded by the CD274 gene)PD-1 acts as an inhibitor of T cell activity under normal conditions.