目的:探讨优化医用直线加速器高能X线全身照射(total body irradiation,TBI)的技术对造血干细胞移植后发生间质性肺炎(IP)的影响。方法:28例患者接受以环磷酰胺(CY)+全身放疗±依托泊苷(Vp-16)为预处理方案的造血干细胞移植,TBI采...目的:探讨优化医用直线加速器高能X线全身照射(total body irradiation,TBI)的技术对造血干细胞移植后发生间质性肺炎(IP)的影响。方法:28例患者接受以环磷酰胺(CY)+全身放疗±依托泊苷(Vp-16)为预处理方案的造血干细胞移植,TBI采用分割放疗、肺挡铅技术,其中19例患者采用热释光剂量片(TLD)监测全身放疗的肺吸收剂量,TBI总量12Gy,共6次,肺部剂量8.5Gy。结果:28例患者随访24~104个月,中位随访时间75个月,5年总生存率(OS)为(53.6±9.4)%,5年无复发生存(RFS)(71.1±8.6)%;19例接受热释光剂量片监测吸收剂量的患者,肺吸收中位剂量8.44Gy,脐部吸收中位剂量11.87Gy,全身剂量的不均匀性<±10%;28例患者无1例发生IP。结论:采用分割全身放疗、肺挡铅、并用热释光剂量片监测肺吸收剂量可降低IP的发生。展开更多
Objective To explore JunB gene expression in spleen cells of mice after the whole body irradiation as well as in normal hematopoietic and leukemia cells in the primary culture after different dosages of X-ray irradia...Objective To explore JunB gene expression in spleen cells of mice after the whole body irradiation as well as in normal hematopoietic and leukemia cells in the primary culture after different dosages of X-ray irradiation. Methods Spleen cells were isolated from the mice irradiated with 3 Gy X-rays. Primary cultured cells from mice were incubated in different intervals after X-irradiation at different dosages. Total RNA was extracted from the cells and the fluctuation of JunB mRNA level was assessed by the RNA ratio of JunB/b-actin measured by quantitative Northern blot hybridization. Results After the mice were exposed to 3 Gy X-rays irradiation, JunB expression in spleen cells was remarkably and rapidly increased, and reached its peak 0.5 h later in C3H/He mice and 1 h later in Balb/c mice. In the primary culture of normal spleen and leukemia cells, JunB mRNA levels increased 30 min after irradiation. The enhanced levels of JunB mRNA were returned to a normal level within 240 min after irradiation. Conclusions JunB gene is responsive to ionizing irradiation and is induced at immediate-early phase after the stimulation. This suggests that the JunB gene plays an important role in the early process of the cells against radiation.展开更多
文摘目的:探讨优化医用直线加速器高能X线全身照射(total body irradiation,TBI)的技术对造血干细胞移植后发生间质性肺炎(IP)的影响。方法:28例患者接受以环磷酰胺(CY)+全身放疗±依托泊苷(Vp-16)为预处理方案的造血干细胞移植,TBI采用分割放疗、肺挡铅技术,其中19例患者采用热释光剂量片(TLD)监测全身放疗的肺吸收剂量,TBI总量12Gy,共6次,肺部剂量8.5Gy。结果:28例患者随访24~104个月,中位随访时间75个月,5年总生存率(OS)为(53.6±9.4)%,5年无复发生存(RFS)(71.1±8.6)%;19例接受热释光剂量片监测吸收剂量的患者,肺吸收中位剂量8.44Gy,脐部吸收中位剂量11.87Gy,全身剂量的不均匀性<±10%;28例患者无1例发生IP。结论:采用分割全身放疗、肺挡铅、并用热释光剂量片监测肺吸收剂量可降低IP的发生。
文摘Objective To explore JunB gene expression in spleen cells of mice after the whole body irradiation as well as in normal hematopoietic and leukemia cells in the primary culture after different dosages of X-ray irradiation. Methods Spleen cells were isolated from the mice irradiated with 3 Gy X-rays. Primary cultured cells from mice were incubated in different intervals after X-irradiation at different dosages. Total RNA was extracted from the cells and the fluctuation of JunB mRNA level was assessed by the RNA ratio of JunB/b-actin measured by quantitative Northern blot hybridization. Results After the mice were exposed to 3 Gy X-rays irradiation, JunB expression in spleen cells was remarkably and rapidly increased, and reached its peak 0.5 h later in C3H/He mice and 1 h later in Balb/c mice. In the primary culture of normal spleen and leukemia cells, JunB mRNA levels increased 30 min after irradiation. The enhanced levels of JunB mRNA were returned to a normal level within 240 min after irradiation. Conclusions JunB gene is responsive to ionizing irradiation and is induced at immediate-early phase after the stimulation. This suggests that the JunB gene plays an important role in the early process of the cells against radiation.
