人类卵巢癌原位移植自发转移裸小鼠模型的构建

 目的　用人类卵巢癌组织块原位移植构建与人类卵巢癌最相似的裸鼠原位移植自发转移模型。方法　将人类卵巢癌高转移细胞系8910PM在裸鼠皮下注射成瘤，然后将瘤组织运用显微外科的方法植入裸鼠卵巢包膜内，原位移植成功后继续在鼠间卵巢包膜内传代，并运用透射电镜进一步验证肿瘤形成和转移效果。结果　裸鼠皮下与卵巢部位成瘤率均为100 %（分别为2／2和16／16），原位移植瘤转移率为50 %。卵巢包膜间传代，第2代、第4代分别出现卵巢癌的肝转移，其他部位尚未见转移灶。最早成瘤时间1周，最早转移出现时间2周。在连续传代过程中移植瘤仍保持原癌组织病理形态特点及人类肿瘤染色体的特点。结论　成功构建了人类卵巢癌原位移植自发转移裸鼠模型，为卵巢癌的转移机制及治疗研究提供了一个理想的动物模型。

Establishment of orthotopic implantation and spontaneous metastasis model of human ovary cancer in nude mice

Objective To establish a patient-like human ovary carcinoma/spontaneous metastasis model using orthotopic transplantation of histologically intact tumor tissue. Methods An highly metastatic ovarian tumor line (8910PM: human serum carcinoma of the ovary) previously grown substaneously was transplanted into the ovicapaule using microsurgery technique. Histologically intact human ovary tumor pieces gained from implantation site were passaged between ovicapsules for four generations. Results All mice developed ovary tumors and the metastatic rates were about 50 %. The tumors only metastasized to liver. The earliest appearance of metastasis was 14 days and the average survival period was 20.7 ±4.89 days. The microscopic appearance of the metastases was similar to the tumor observed in the substaneous xenografts and orthotopically transplanted.Chromosomes analysis exhibited the feature of human carcinoma and retained genetic stability during the processes of passage. Conclusion Orthotopic implantation provides a suitable micro-environment in which ovarian cancer can express its intrinsic clinically-relevant properties. This approach is relevant to the spontaneous development of ovarian cancer and is thought to be a useful model for studies of metastatic mechanism and therapy for ovary cancer.