急性白血病患儿T淋巴细胞亚群及血清白三烯B4含量变化的临床意义

目的 探讨急性白血病(AL)患儿外周血T淋巴细胞亚群和血清白三烯B4含量的变化及临床意义.方法 用免疫荧光流式细胞技术检测40例AL患儿(观察组)及40名正常儿童(对照组)外周血T淋巴细胞亚群CD3+T细胞、CD4+T细胞和CD8+T细胞水平及自然杀伤(NK)细胞活性;同时采用酶联免疫吸附试验(ELSA)方法检测上述AL患儿与正常儿童血清白三烯B4含量的变化情况.结果 AL患儿CD3+T细胞[(49.51±6.53)%]、CD4+T细胞[(22.15±4.87)%]及CD8+T细胞[(23.41±3.96)%]均低于对照组[分别为(67.63±5.23)%、(34.43±5.07)%(28.17±4.61)%],差异有统计学意义(t=13.698、t=11.047、t=4.953,P＜0.01);AL患儿自然杀伤细胞活性[(5.41±4.25)%]明显低于对照组[(13.10±4.91)%],差异有统计学意义(t=7.498,P＜0.01);而AL患儿血清白三烯B4含量[(25.23±6.24)ng/L]明显高于对照组[(8.28±2.53)ng/L],差异有统计学意义(t=15.921,P＜0.01).结论 AL患儿T淋巴细胞亚群及白三烯B4发生明显改变,对揭示AL发病机制提供重要的理论依据.

Abstract：

Objective To study the changes of T lymphocyte subtype levels and serum levels of leukotriene B4 ( LTB4 )in children with acute leukemia (AL). Methods The activity of T lymphocyte subsets:CD3+ T cells,CD4+ T cells,CD8 + T cell levels and NK cell were detected in 40 cases of AL and 40 control by Flow Cytometry(FCM). The serum level of LTB4 was measured by ELISA in all subjects. Results Compared with normal control , the percentages of CD3 + T cells ( [ 49.51 ± 6.53 ] ％ vs [ 67.63 ± 5.23 ] ％ ), CD4 + T cells ([22.15±4.87]％ vs [34.43 ±5.07]％),CD8+ T cell ([23.41 ±3.96]％ vs [28. 17 ±4.61]％),NK cell ( [5.41 ± 4.25 ] ％ vs [ 13.10 ± 4.91 ] ％ ) were significantly lower in children AL patients, ( Ps ＜0.01 ). However,the serum levels of LTB4 increased significantly in AL patients compared with normal control ( [ 25.23 ± 6.24 ] ng/L vs [ 8.28 ± 2.53 ] ng/L, P ＜ 0.01 ). Conclusion T lymphocyte subtype and serum level of LTB4 showed significant changes in children AL patients compared with normal control, which revealed an important theoretical basis to AL pathogenesis.

Clinical significance of changes of T lymphocyte subtype and serum levels of leukotriene B4 in children with acute leukemia

Objective To study the changes of T lymphocyte subtype levels and serum levels of leukotriene B4 ( LTB4 )in children with acute leukemia (AL). Methods The activity of T lymphocyte subsets:CD3+ T cells,CD4+ T cells,CD8 + T cell levels and NK cell were detected in 40 cases of AL and 40 control by Flow Cytometry(FCM). The serum level of LTB4 was measured by ELISA in all subjects. Results Compared with normal control , the percentages of CD3 + T cells ( [ 49.51 ± 6.53 ] ％ vs [ 67.63 ± 5.23 ] ％ ), CD4 + T cells ([22.15±4.87]％ vs [34.43 ±5.07]％),CD8+ T cell ([23.41 ±3.96]％ vs [28. 17 ±4.61]％),NK cell ( [5.41 ± 4.25 ] ％ vs [ 13.10 ± 4.91 ] ％ ) were significantly lower in children AL patients, ( Ps ＜0.01 ). However,the serum levels of LTB4 increased significantly in AL patients compared with normal control ( [ 25.23 ± 6.24 ] ng/L vs [ 8.28 ± 2.53 ] ng/L, P ＜ 0.01 ). Conclusion T lymphocyte subtype and serum level of LTB4 showed significant changes in children AL patients compared with normal control, which revealed an important theoretical basis to AL pathogenesis.