Objectives. To assess chemo-response of patient derived ovarian cancer cells to first line chemotherapeutic agents as well as targeted therapies.

Methods. Ascites was obtained at laparotomy from 14 patients with epithelial ovarian cancer. Short term cultures were established in 11 of these and the cells characterized by morphology and immuno-staining to cytokeratin AE1/AE3 and E-cadherin. MTT assays were done on the 11 samples after 48 hours of exposure to Cisplatin, Paclitaxel, Vandetanib and Flavopiridol.

Results. Three samples did not grow well and ultimately showed senescence or were over-run by fibroblasts. In the remaining 11 samples, morphology showed the cells to be arranged in a cobble-stone or rosette pattern. Most of the cells stained positive for cytokeratin AE1/AE3 and E-cadherin. The majority of samples (8/11, 73%) were sensitive to either Cisplatin or Paclitaxel. Of the three resistant samples, one was sensitive to Vandetanib, one to Flavopiridol and one was resistant to all four drugs. Two patients did not receive chemotherapy due to morbidity or mortality. Among those who were treated, 4 (50%) had complete response and are currently free of disease.

Conclusions. Short term cultures may be a good method of studying chemo-response of tumor cells ex-vivo.

Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 3544.