^32P粒子植入对正常肝组织损伤及体内代谢的实验研究

目的观察32P-磷酸铬-聚L-乳酸(32P-CP-PLLA)粒子对正常犬肝组织损伤效应,及其体内代谢和缓释效应。方法Beagle犬12只,随机分为4个剂量组,A组185 MBq、B组370 MBq、C组740MBq,D组为空白对照假手术组。采用开腹将32P-CP-PLLA粒子植入犬肝脏内,3个月后处死。术前及处死前均行CT扫描,术前及术后1、2、4、8、12周进行血象及血清生化检查,B、C两组各选1只于代谢笼内饲养,术后1个月内每24 h测量粪便及尿液放射性计数率值(cpm),术后1、2、4、8、12周每组选1只犬行肝穿刺及SPECT韧致辐射显像,处死时行病理学检查。结果所有实验犬血象及血生化各项指标未见明显异常;术后30 d的排泄物放射性检查表明粒子在体内缓慢释放;尿、粪排出的放射性计数累积百分率分别为6.34%和11.64%;SPECT显像示无粒子移位现象;3个月后解剖发现粒子体积变小、质地松脆,CT、大体标本和病理学检查结果均发现随着剂量增大,肝脏内粒子植入部位毁损灶增大。32P-CP-PLLA粒子造成的局部肝损伤呈一球形灶:纤维化组织包绕坏死灶,外周可见一圈水肿带。结论32P-CP-PLLA粒子植入犬...

The metabolism of ~(32)P-CP-PLLA seed implanted in the liver and its damage to the normal liver tissue: a study in the experimental dogs

Objective To investigate the effects of intratumoral implantation of 32P -CP-PLLA seeds on the normal canine liver tissue and to explore the metabolism of 32P-CP-PLLA seeds implanted in the liver of experimental dogs. Methods Twelve beagles were enrolled in this study. The dogs were randomly and equally divided into four groups: group A (185 MBq), group B (370 MBq), group C (740 MBq) and group D (0 MBq). By using laparotomy procedure 32P-CP-PLLA seeds were implanted into dog's liver. CT scan was performed b...