[Comparison of the clonal expansion of TCR Vbeta T cells in patients with acute promyelocytic leukemia in vivo and in vitro].
In order to analyze the distribution and clonal expansion of TCR Vbeta subfamily T cells in patients with acute promyelocytic leukemia (APL) in vivo and in vitro after T cell culture, the peripheral blood mononuclear cells from 3 APL patients were expanded by rhIL-2 and anti-CD3 antibody using liquid T lymphocytes culture technique. The complementary determining region 3 (CDR3) of TCR beta with variable region genes was amplified in T cells from 3 APL cases before and after T cell culture by using RT-PCR. The positive products were further analyzed to identify the clonality of T cells by genescan. The results showed that only a part of 24 Vbeta subfamilies was detected in T cells from the patients, and some Vbeta subfamily T cells could be identified after T cells culture. The clonal expansion T cells in some TCR Vbeta subfamilies could be found in all patients. The similar oligoclonal expansion of Vbeta1, Vbeta3, Vbeta7, Vbeta16 and Vbeta20 T cells was detected in two cases at different time points after T cell culture. It is concluded that the restricted expression of TCR Vbeta subfamily in T cells from patients might be the common feature in leukemia. Some Vbeta subfamily T cells could be induced after T cells culture in vitro. The continual clonal expansion of TCR Vbeta subfamily T cells at different time points after T cells culture could be a specific immune response of patients T cells related to the specific APL cell associated antigen.
Institute of Hematology, Jinan University Medical College, Guangzhou 510632, China. jnyanglijian@163.net
Li-Jian
LJ
Yang
Yang-Qiu
YQ
Li
Shao-Hua
SH
Chen
Su-Fang
SF
Han
Sheng-Ting
ST
Chen
Xue-Li
XL
Zhang
Tao
T
Zhang
D006801:Humans; D015473:Leukemia, Promyelocytic, Acute / Q000235:genetics / Q000276:immunology*; D008213:Lymphocyte Activation; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics*; D013601:T-Lymphocytes / Q000276:immunology
D016693:Receptors, Antigen, T-Cell, alpha-beta