职业性慢性铅中毒患者CD8低表达T淋巴细胞数量观察

目的 通过分析外周血T淋巴细胞CD8分子表达水平,了解职业性慢性铅中毒患者异常的免疫功能状态.方法 对23例职业性慢性铅中毒患者(铅中毒组)及20例健康非职业铅接触成人(对照组)采用流式细胞技术检测外周血T淋巴细胞CD8分子表达水平,统计CD8低表达(CD8low)细胞群和正常表达(CD8nomal)细胞群的数量.结果 与对照组(8.21%±3.02%)比较,铅中毒组CD8low细胞群相对百分比(12.98%±5.62%)明显增加,差异有统计学意义(P＜0.05);两组CD8nomal细胞群数量则无明显变化.结论 职业性慢性铅中毒患者外周血CD8+T淋巴细胞虽然总数没有异常,但CD8分子表达出现了弱化.该现象可能是铅致免疫功能损伤重要表现之一,CD8low细胞群有望成为研究铅免疫毒性新的线索.

Abstract：

Objective To analyze the changes in CD8low T lymphocyte subsets in patients with occupational chronic lead poisoning. Methods Flow cytometric analysis was used to count the numbers of CD8+ cells. 23 patients with occupational chronic lead poisoning and 20 controls were examined. Results Compared with control group (8.21%±3.02%), the CD8low T lymphocyte (12.98%±5.62%) were significantly increased in patients with occupational chronic lead poisoning. Conclusion Although the ratio of CD +T lymphocyte is normal, the CD8 level is significantly decreased. The increase of CD8low T lymphocyte may be an important phenomenon of immuno-injury induced by lead. CD8low T lymphocyte could be an new direction for research of lead immuno-toxicity.

Abnormal increase in CD8(low) T lymphocyte in patients with occupational chronic lead poisoning

Objective To analyze the changes in CD8low T lymphocyte subsets in patients with occupational chronic lead poisoning. Methods Flow cytometric analysis was used to count the numbers of CD8+ cells. 23 patients with occupational chronic lead poisoning and 20 controls were examined. Results Compared with control group (8.21%±3.02%), the CD8low T lymphocyte (12.98%±5.62%) were significantly increased in patients with occupational chronic lead poisoning. Conclusion Although the ratio of CD +T lymphocyte is normal, the CD8 level is significantly decreased. The increase of CD8low T lymphocyte may be an important phenomenon of immuno-injury induced by lead. CD8low T lymphocyte could be an new direction for research of lead immuno-toxicity.