摘要
目的 :了解急性单核细胞白血病 (ANLL -M5亚型 )病人TCRVβ亚家族T细胞的分布及其克隆性。方法 :利用RT -PCR分别扩增 9例M5病人外周血单个核细胞的TCRVβ 2 4个亚家族基因的CDR3,了解病人各Vβ亚家族的利用情况。阳性的PCR产物进一步经荧光素标记和基因扫描分析产物的CDR3长度 ,了解T细胞克隆性。结果 :9例病人仅存在 1- 10个Vβ亚 家族T细胞。基因扫描分析显示 ,8例病人外周血中的某些Vβ亚家族出现寡克隆性T细胞 ,Vβ 2寡克隆T细胞发现于 6例病人中 ,2例分别存在Vβ 7或Vβ 9克隆性T细胞 ,2例除Vβ 2外 ,还分别出现Vβ 7或Vβ 2 1的寡克隆T细胞。结论 :结果提示M5病人外周血Vβ亚家族T细胞的倾斜性分布特点 ,并存在克隆性增殖的T细胞 ,这可能是机体T细胞受白血病细胞相关抗原的刺激作用而引起机体产生相应的特异性免疫反应 ,并以Vβ 2的克隆性增殖T细胞为主 ,提供了明显的趋向性 。
AIM: To investigate the distribution and clonal expansion of TCR Vβ subfamily T cells in patients with acute monoblastic leukemia (M5). METHODS:The CDR3 of TCR Vβ 24 subfamily genes were amplified in peripheral blood mononuclear cells from 9 cases with M5 using RT-PCR and the PCR products were further labeled with fluorescent and analyzed by genescan technique for the CDR3 size, to evaluate clonality of the detectable TCR Vβ T cells. RESULTS:Only 1-10 Vβ subfamily T cells were identified in M5 cases. Genescan analysis showed that oligoclonal (clonal expansion) T cells were found in some Vβ subfamilies from 8 cases with M5, Vβ 2 oligoclonal T cells were identified in six cases, whereas Vβ 7- or Vβ 9 clonal expansion T cells were detected in the other two cases, respectively. In addition, except Vβ 2, Vβ 7 or Vβ 21 oligoclonal T cells could be detected in two cases, respectively. CONCLUSION:The skew distribution and clonal expansion of TCR Vβ subfamily T cells could be found in patients with M5. It may be a specific anti-leukemia immune response with which the host T cells were activated by the leukemia-associated-antigen. The clonal expansion T cells were tendentious in Vβ 2, which may be related to the M5 leukemia cells associated antigen.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2002年第7期765-769,共5页
Chinese Journal of Pathophysiology
基金
国家自然科学基金资助项目 (No .39870 35 8)
广东省自然科学基金资助项目 (No .980 70 5 )
广州市科委重点科技攻关计划 (No .98-z - 0 39- 0 1)
广东省医学科研基金资助项目 (No.A19992 71)
