Establishment of orthotopic impact/metastasis model of human ovary cancer in nude mice

Objective: To establish a patient-like human ovary carcinoma /spontaneous metastasis model using orthotopic transplanation of histologically intact tumor tissue. Methods: An highly metastatic ovarian tumor line (HO-8910PM: Human serum carcinoma of the ovary )previously grown substaneously was transplanted into the ovicapsule 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 75%. The tumors only metastasized to liver but no other organs. The earliest appearance of metastasis was 14 d and the average survival period was 20.7±4.89 d.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 implanation provides a suitable micro-enviroment 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.