title: Biological and pharmacological characterisation of three models of human ovarian carcinoma established in nude mice: use of the CA125 tumour marker to predict antitumour activity.
abstract: In an attempt to improve the relevance of human tumour xenografts to the clinical situation, we have established 3 models of human ovarian carcinoma (IGROV1, A2780 and NIH:OVCAR-3) in nude mice in which progressive peritoneal carcinomatosis resulted in the death of tumour-bearing animals (median survival times: 32, 40 and 64 days, respectively). Histological analyses revealed both common and different characteristics in growth patterns and dissemination profiles. In each case, three stages of the disease were defined (early, intermediate and late). The antitumour activities of adriamycin, cisplatin, cyclophosphamide and paclitaxel were then compared when administered at the early stage where small multifocal tumour nodules were detectable in the peritoneal cavity of the animals. Significant antitumour activities of cisplatin and particularly paclitaxel were noted in terms of increase in survival time of the treated mice (T/C values for IGROV1, A2780 and NIH:OVCAR-3 respectively: 152%, 167%, and 187% for cisplatin and 211%, 179% and >283% for paclitaxel), paclitaxel being curative against the NIH:OVCAR-3 xenograft. These results reflect the high efficacy of these two drugs in the clinic in the treatment of ovarian carcinoma. The clinically used CA125 tumour marker, not detectable in healthy mice, was measured in the serum of mice bearing IGROV1 and NIH:OVCAR-3 tumours. CA125 serum levels increased as a function of time and were well correlated to disease progression. Moreover, treatment with cisplatin and paclitaxel led to significant decreases in these levels of between 58% and 100%. This human serum marker could be used to predict early on the efficacy of chemotherapy in these two models. In conclusion, the three experimental ovarian carcinomas possess several important characteristics of the human disease and may thus be used as a screen to select new antitumour drugs potentially active in this pathology.
authors.affiliation: Institut de Recherches Servier, Division de Cancerologie Experimentale, 92150 Suresnes, France.
authors.forename: M F
authors.initials: MF
authors.lastname: Burbridge
authors.forename: L
authors.initials: L
authors.lastname: Kraus-Berthier
authors.forename: M
authors.initials: M
authors.lastname: Naze
authors.forename: A
authors.initials: A
authors.lastname: Pierre
authors.forename: G
authors.initials: G
authors.lastname: Atassi
authors.forename: N
authors.initials: N
authors.lastname: Guilbaud
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000097:blood; D018394:CA-125 Antigen / Q000097:blood / Q000187:drug effects; D002945:Cisplatin / Q000627:therapeutic use; D004195:Disease Models, Animal; D005260:Female; D006801:Humans; D051379:Mice; D020297:Mice, Congenic; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental / Q000097:blood / Q000188:drug therapy / Q000473:pathology; D010051:Ovarian Neoplasms / Q000097:blood / Q000188:drug therapy* / Q000473:pathology; D017239:Paclitaxel / Q000627:therapeutic use; D016019:Survival Analysis; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D014408:Biomarkers, Tumor; D018394:CA-125 Antigen; D017239:Paclitaxel; D002945:Cisplatin