131I-GM-CSF在人白血病SCID小鼠模型体内的生物学分布

目的 观察131I-GM-CSF在人急性髓系白血病SCID小鼠模型体内的生物学分布.方法 用SCID小鼠建立人白血病异种移植模型,用氯胺-T法制备131I-GM-CSF,观察131I-GM-CSF在白血病小鼠体内的生物学分布.结果①静脉接种的HL-60细胞在SCID小鼠体内植活,4周后发生白血病;②131I-GM-CSF主要滞留于模型小鼠的脾脏、骨髓及瘤体组织中,且前两者对131I-GM-CSF摄取于注入后30 min达峰值,组织摄取率分别为(442.9±86.4)%ID/g和(4283.8±252.8)%ID/g,滞留24h后高于其他脏器.而131I呈非特异性分布.结论 131I-GM-CSF集中分布于人白血病SCID小鼠模型脾脏、骨髓及白血病细胞浸润组织,具有组织器官相对特异性.

Biodistribution study of 131I-GM-CSF in SCID mice bearing human leukemia

OBJECTIVE: To investigate the biodistribution of 131I-GM-CSF in SCID mice bearing human AML in vivo. METHODS: The xenograft model of human leukemia was established in SCID mice. In the leukemia mice, the biodistribution of 131I-GM-CSF produced by chlo amine-T method was studied. RESULTS: (1)The inoculated HL-60 cells could grow in SCID mice, which developed leukemia after 4 weeks. (2) 131 I-GM-CSF was concentrated in spleen, bone marrow and tumor tissue of the mice. In spleen and bone marrow, 131 I-GM-CSF was uptaken to peak in 30 minutes after injection, the up taking rate was (442. 9+/-86. 4) % ID/g and (4283. 8+/-252. 8)% ID/g, respectively, and maintained on higher level in 24 hours. The injection of 131I resulted in an even distribution in the whole body. CONCLUSIONS: 131 I-GM-CSF is able to concentrate electively in spleen, bone marrow and organs infiltrated by leukemia cells. The biodistribution of 131I-GM-CSF in the leukemia mice is tissue specific.