Subsequent detection, quantification and molecular characterization of CTCs has an enormous potential in numerous of oncology areas. But detection and isolation of CTCs is technically quite challenging. The whole dissemination process encompasses also individual tumor cells which are found in relatively big quantities in peritoneal washings (PW) and pleural effusions (PE), so called disseminated tumor cells (DTCs).

Thanks in vitro cultures of separated CTCs/DTCs we were able to introduce additional chemosensitivity testing for the purpose of individualized cancer treatment. We present an isolation and cultivation of CTC/DTC of non-small cell lung cancer and gastrointestinal cancers (esophageal cancer, colorectal cancer, gastric cancer, pancreatic cancer) describing cultivation methodology on patients case studies.

The cancer cells were separated from body fluids (PW, PE, blood) using the differences in size of cancer cells if compared to other nucleated cells detected in body cavities. After reaching the confluence the chemosensitivity of cell cultures has been tested by xCELLigence system (RTCA, Roche) for different concentrations of single cis-platinum, gemcitabine and fluorouracyl (incubation time 24-72 hours) or their combinations. The dynamic real-time cell growth monitoring enables parallel or sequential combinations of administered drugs with a direct outcome for patients care.

Conclusions: We assume that developing cultivation strategies for CTCs/DTCs could bring us closer to the definition of the CTC/DTC-function within the dissemination process with a perspective to use this knowledge in personalized cancer treatment.

Citation Format: Vladimir Bobek. In vitro culturing of CTCs/DTCs in personalized cancer management. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 1464. doi:10.1158/1538-7445.AM2013-1464