外周T细胞淋巴瘤非特指型TCRβ V/J取用及CDR3谱型分析

摘要

Objective To analyze the restricted usage of TCRβ V/J subfamily and CDR3 repertoire in patients with peripheral T-cell lymphoma unspecified (U-PTL).Methods The total RNA was respectively extracted from lymph node of U-PTL and reverse transcriptase,then multi-PCR was used to amplify the complete DNA sequence(CDS) of TCR β-chain.The recombinant plasmids were sequenced and sequence was analyzed by using online TCR resources.Results There were 9 TCR β chain CDS obtained from four patients.TCRβ-chain presented specific repertoire skewing in patients with U-PTL.There were restricted usage of BV2,BV4S2,BV14,BV29S1 of BV subfamily and BJ1S4,BJ2S3,BJ2S5,BJ2S7 of BJ subfanily.The clonal proliferation T cells had different CDR3 amino acid sequences.Conclusions There are restricted usage of TCR β V/J subfamily in patients with U-PTL.The sequences of CDR3 in different TCR clone proliferation are mostly different.%目的 分析外周T细胞淋巴瘤非特指型TCR β V/J亚家族限制性取用及CDR3谱型.方法 提取4例外周T细胞淋巴瘤非特指型患者病变淋巴结总RNA后进行反转录,多重聚合酶链反应(PCR)扩增TCRβ全长序列,构建重组质粒并测序,利用网上TCR资源分析序列.结果4例患者共获得9个TCR β链全长序列.克隆性增生T细胞V、J亚家族分别限制性取用BV2、BV4S2、BV14、BV29S1和BJ1S4、BJ2S3、BJ2S5、BJ2S7,并具有不同的CDR3区氨基酸序列.结论外周T细胞淋巴瘤非特指型TCRV β、VJ亚家族具有限制性取用,不同T细胞克隆的CDR3序列不同.