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目的:探讨放射损伤后骨髓造血功能衰竭的机制,为重建造血功能提供理论依据。方法:检测昆明种雄性小鼠经 6 Gy 60 Coγ射线照射后血清对 C F U E 和 C F U G M 的支持和抑制活性,用放免和 E L I S A 法分别检测血清中 T N Fα和 T G Fβ1 的含量。结果:①照射后小鼠血清对 C F U E 的支持活性降低, 但对 C F U G M 的支持活性增强;②血清对刺激因子诱导的 C F U E 和 C F U G M 均有显著的抑制活性;③血清经灭活后抑制活性降低;④放射损伤后血清 T N Fα在 1、3 d 降低,7、15 d恢复到正常水平; T G Fβ1 在 1、3 d 显著升高,15 d 降低。结论:放射损伤后血清对血细胞的生成具有细胞刺激因子依赖性抑制作用,血清的造血抑制作用与血清中抑制因子水平及细胞毒作用有关。
Objective: To investigate the mechanism of bone marrow hematopoietic failure after radiation injury, and to provide a theoretical basis for the reconstruction of hematopoietic function. METHODS: The serum concentrations of C F UE and CF UG M in Kunming male mice irradiated by 6 Gy 60 Co γray were detected by radioimmunoassay and ELISA. N F α and T G F β1 content. Results: ①The serum concentration of C F UE on C F UE and C F UG M decreased after irradiation; ② The effect of serum on C F UE and C F UG M were significantly inhibited activity; ③ serum inactivated inhibitory activity decreased; ④ radiation T N F α after injury in the 1,3 d decreased 7,15 d back to normal levels; T G F β1 at 1,3 d increased significantly, 15 d decreased. CONCLUSION: Serum has a cytokine-dependent inhibitory effect on the production of hematopoietic cells after radiation injury, and the hematopoietic inhibitory effect on serum is related to the level of cytokines and cytotoxicity.