瘤内注射188Re-硫化铼混悬液治疗肝癌的实验研究

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目的评价188Re-硫化铼混悬液用于介入治疗肝癌的可能性。方法 30只荷人SMMC-7721肝癌细胞株的裸鼠肿瘤内分别注射188Re-硫化铼混悬液和188Re-NaReO4溶液,进行生物分布研究。另30只平均分成6组,其中4组分别注射0.1 mL的3.7、7.4、18.5、29.6 MBq的188Re-硫化铼混悬液;余下2组作为对照组注射非放射性硫化铼混悬液和生理盐水。6 d后重复注射。结果注射188Re-硫化铼混悬液的裸鼠,肿瘤内放射性摄取率(%ID)1 h为(90.96±6.63)%,24 h为(86.09±22.58)%,48 h为(87.62±13.97)%,高于正常组织。而注射188Re-NaReO4溶液的裸鼠,肿瘤内%ID 1 h为(1.66±0.35)%,24 h为(0.02±0.01)%,48 h为(0.01±0.01)%,和正常组织无多大区别。当肿瘤边缘(距肿瘤中心约0.5~0.6 cm)的吸收剂量为507.6 Gy时,肿瘤抑制率可达89%。结论 188Re-硫化铼混悬液是有希望的肝癌治疗剂。
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