光性视网膜变性猪视网膜移植术后视功能的综合评价

目的 通过移植分化完成而发育不完全的新生猪全层视网膜组织,探讨此种供体改善光变性猪视功能的可能性.方法 选1～6 d新生小猪为供体,用准分子激光微切削脉络膜制备神经上皮-RPE联合移植片,并通过玻璃体-视网膜手术将联合移植片移植进光变性猪视网膜下腔.在视网膜移植术后1周、1～5个月,通过检眼镜、眼底彩照、荧光造影,观察移植物的存活状况及宿主视网膜有无排斥反应迹象;用mfERG检测并比较不同时相间N1、P1波振幅和潜伏期,综合评价移植术后视网膜功能的变化.结果 对8只光变性猪15眼实施视网膜移植手术,移植物植入视网膜下腔11眼,手术成功率为84.6%.移植术后1～2个月可见与宿主视网膜有清楚界限的移植床及其内灰黑色移植物, FFA检查可见移植物有荧光渗漏.光变性猪视网膜移植术后1～5个月, mfERG检测N1波、P1波幅值和潜伏期并在不同时相点间比较,发现N1波、P1波幅值随存活时间延长而增高,反应活跃区在第2、3环;而各环N1波、P1波潜伏期较手术前均明显缩短,存活后期更显著.结论 功能检测结合活体形态的同步观察,综合评价视网膜移植术后光变性猪视网膜功能改善的效果,从而证实了分化成熟的新生猪视网膜移植确实改善了光变性猪的视网膜功能.

Evaluation of retinal function after retinal transplantation for light-induced retinal degeneration in miniature pigs

Objective To investigate the possibility that transplanting the full-thickness neonatal piggy retinas that are completely differentiated but immature improves the retinal function after light-induced retinal degeneration in pigs.Methods Retinas from normal Guangxi Bama pigs aged 1-6 days were used as donor tissues.Neuroretina-RPE cografts were obtained from newborn pigs by using excimer laser for microablation of choroidal tissue and transplanted into the subretinal cavity of adult Bama pigs after light-ind...