CD107α表达对NK细胞与细胞毒性T细胞细胞毒功能缺陷性疾病筛查价值探讨
发布时间:2021-03-03 11:09
目的:1、建立自然杀伤性细胞及细胞毒性T细胞表面溶酶体相关膜蛋白质1(LAMP-1,CD107α)表达流式细胞术检测方法;2、探讨其对自然杀伤性(NK)细胞与细胞毒性T淋巴细胞(CTL)细胞毒功能及相关性疾病的筛查价值。方法:收集疑诊Chediak-Higashi综合征(Chediak-HigashiSyndrome,CHS)患儿3例、噬血淋巴组织细胞增生症(HLH)患儿3例及10例健康对照儿童外周血,提取外周血DNA及RNA,PCR或RT-PCR扩增目的基因,测序分析基因背景。外周血单个核细胞(PBMC)以重组人白介素受体2(IL-2)刺激过夜,再以植物凝集素(PHA)或T细胞刺激剂Anti-CD3活化刺激细胞2h后,流式细胞术分析NK细胞及CTL CD107α表达频率及强度。结果:10例健康儿童PBMC刺激前后NK细胞[(0.27±0.07)%vs.(5.80±2.83)%,P<0.05]及CTL[(0.18±0.07)%vs.(4.47±2.36)%,P<0.05]表面CD107α表达频率均显著升高,其平均荧光强度(MFI)亦显著升高。与10例正常儿童比较,3例疑似CHS患儿外周血PBMC经Anti-CD3活化后CTL表面CD107α表达无明显上升(0.3%、0.9%、0.2%),对照组(4.47±2.36)%;PHA刺激后两例患儿NK细胞表面CD107α表达频率亦无明显变化(0.5%、0.6%),对照组(5.80±2.83)%,其MFI变化趋势与CD107α表达率类似。3例HLH患儿NK细胞(3.3%、4.1%、2.7%),对照组(5.80±2.83)%;CTL(2.8%、1.7%、1.9%),对照组(4.47±2.36)%;表面CD107α刺激前后其表达频率及MFI与正常对照组差异无统计学意义。3例疑似CHS患儿中两例患儿LYST基因突变分别为(c.5411-5414del TTTC,L1741fsX1758和c.7975C>T,R2596X)和(c.4863G>A, R1563H和c.5392-5393delAA, E1739fsX1756),确诊为CHS综合征,另一例基因诊断尚未明确。3例HLH患儿PRF、MUNC13-4及STX11基因检查结果均未发现突变。结论:成功建立CD107α表达流式细胞检测方法,并在CHS中验证,该方法可能用作细胞毒功能的筛查方法,为后续基因确诊及发现新的致病基因奠定基础。
【文章来源】:重庆医科大学重庆市
【文章页数】:54 页
【学位级别】:硕士
文章目录
英汉缩略语名词对照
中文摘要
英文摘要
前言
1 材料和方法
2 结果
3 讨论
参考文献
全文总结
文献综述
参考文献
致谢
攻读硕士学位期间发表的论文
参考文献
国际期刊论文
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