View clinical trials related to Neoplastic Cells, Circulating.
Filter by:Several studies have indicated that determining prevalence and number of circulating tumor cells (CTCs) at various time points during treatment may be an effective tool for assessing treatment efficacy in metastatic breast cancer (MBC). However, even if the prognostic value of CTCs in MBC is well understood, the role of both CTC prevalence and CTC phenotype in predicting treatment response needs further investigation. DETECT IV is a prospective, multicenter, open-label, phase II study in patients with HER2-negative metastatic breast cancer and persisting HER2-negative circulating tumor cells (CTCs). Additional research on CTC dynamics and characteristics will provide a better understanding of the prognostic and predictive value of CTCs and is one step into a more personalized therapy for MBC.
The STIC CTC study is a randomized trial to evaluate the medico-economic interest of taking into account circulating tumor cells (CTC) to determine the kind of first line treatment for metastatic, hormone-receptors positive, breast cancers. In the standard arm, the kind of treatment will be decided by clinicians, taking into account the criteria usually used in this setting. In the CTC arm, the type of treatment will be decided by CTC count: hormone-therapy if <5CTC/7.5mll (CellSearch technique) or chemotherapy if =5. The main medical objective is to demonstrate the non-inferiority of the CTC-based strategy for the progression-free survival: 994 patients are needed, and will be accrued in French cancer centers. Secondary clinical objectives are to compare toxicity, quality of life and overall survival between the two arms. The medico-economic study will compare cost per progression-free life years gained of the two strategies. The financial impact of centralized (one platform) vs decentralized (several platforms) CTC testing will be evaluated.
This study enrolled patients with measurable metastatic colorectal cancer. Blood was drawn prior to the patient receiving a new therapy for his/her cancer and subsequently at 7-14 days, 3-4 weeks, and when an imaging study was done (~every 6 to 12 weeks). The blood was tested to find circulating tumor cells (CTCs) and to count them. The CTC levels were compared to the imaging study results to see if the CTC number and the imaging result (progression/no progression) were in agreement. Maximum active study participation was 12 months with up to 8 blood draws being taken. All patients are currently being followed for up to 24 months from their off study date for survival. The CTC result will also be used to see if there is a difference in survival and progression-free survival for those patients with and without a certain number of CTCs.
This study enrolled men with prostate cancer who had failed hormone therapy (as shown by rising prostate-specific antigen [PSA] levels) and who were about to start a new line of chemotherapy. Blood was drawn prior to the patient receiving chemotherapy and then monthly thereafter for up to 18 months or until disease progression, whichever occurred first. The blood was tested to find circulating tumor cells (CTC) and to count them. The circulating tumor cell levels were studied in relation to the patient's overall survival. Serum was also collected for PSA testing, and additional blood samples were drawn to test for circulating endothelial cells and RNA was isolated for future gene expression testing.