Malignant and normal T cells show random use of T-cell receptor alpha chain variable regions in patients with cutaneous T-cell lymphoma.
Malignant and normal T cells show random use of T-cell receptor alpha chain variable regions in patients with cutaneous T-cell lymphoma.
复制标题
皮肤 T 细胞淋巴瘤患者的恶性和正常 T 细胞显示 T 细胞受体 α 链可变区的随机使用。
DOI:
10.1111/1523-1747.ep12312571
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Tigelaar,R
中科院分区:
文献类型:
--
作者:
Longley,J;Tyrrell,L;Lu,SZ;Farrell,J;Ding,TG;Yan,S;Sallee,D;Heald,P;Berger,C;Tigelaar,R
Cutaneous T-cell lymphoma (CTCL) is a malignancy of mature T lymphocytes, most of which express α/β type T-cell receptors (TCRs). The cause of CTCL is unknown, but hypotheses postulating chronic stimulation of TCRs by superantigen or by a leukemogenic virus have been proposed. Either mechanism might produce bias in the TCR variable (V) region types used by the malignant cells. To determine if TCR α use is restricted in CTCL, we used reverse transcription and the polymerase chain reaction to determine Vα and Vβ usage by malignant cells purified from the peripheral blood of leukemic patients with CTCL. Usage of a chain V region segments appeared totally random; malignant lymphocytes isolated from each of six patients used different Vα regions. As has been previously reported, no bias was found in 13 chain V region usage either. In addition to productive (in frame) TCR V region mgNAs in malignant cells from each patient, we detected non-productive (out of frame) 13 chain transcripts in these cells in two of six patients, and non-productive α chain transcripts in five of six. Residual normal peripheral blood lymphocytes from these patients showed a random, polyclonal or oligoclonal pattern of V region usage. We conclude that there is no bias in V region usage in CTCL, making it unlikely that interactions between superantigen or virus and the TCR V regions play a role in the pathogenesis of CTCL.