View clinical trials related to Circulating Tumor Cell.
Filter by:Transurethral resection of bladder tumor (TURBT) is usually performed in a piecemeal technique. Tumor fragmentation and cell spilling could be responsible for high recurrence rates. Circulating tumor cells (CTCs) have been shown to be a prognostic predictor in disease progression in transitional cell carcinoma. In the current study the investigators aim to quantify CTCs in purging fluid and blood for recurrent intermediate risk bladder cancer during surgery for two different methods: TURBT and Plasma-kinetic vaporization of bladder tumor (PKVBT). Also correlations for recurrence will be investigated for the two different surgical methods.
Hepatocellular carcinoma (HCC) recurs in up to 60% of patients who undergo resection. Circulating tumor cells (CTC) have been advocated as promotors of the recurrence. However, their role as prognostic markers in the surgical setting is unclear. The aim of the present study has been to assess the association between CTC from peripheral blood samples and the risk of recurrence after surgery. Patients with a first diagnosis of HCC, no previous treatment for this condition, no other oncological history, and BCLC stage 0-A-B will be enrolled in 2 centers. Patients will undergo to serial liquid biopsies (i.e., a 15ml peripheral blood sample on each time point) at day 0-30-90-180-365 after surgery. After isolation of peripheral blood mononucleate cells, CTC will be detected by FACSymphony™ and subsequently the following markers will be identified: EpCAM, N-cadherin (N-cad) and CD90. Epithelial-mesenchymal transition (EMT) will be analyzed by an index estimated as the ratio between the number of EpCAM+/N-cad- and EpCAM+/N-cad+ cells (EMT Index). Patients will be divided according to the recurrence status.
The discovery of cell-free circulating tumor DNA (crDNA) in blood and the maturation of technologies for ctDNA analysis have presented an attractive opportunity for minimally invasive "liquid biopsy" genomic diagnostics. The investigators plan to perform EUS-guided portal vein and hepatic vein aspiration in GI cancers patients. The aim of the current study is thus to examine the concentration of ctDNA in portal vein (EUS-guided PVA), hepatic vein (EUS-guided HVA) and peripheral blood to understand the first pass effect of the liver with gastrointestinal (GI) cancers, and the possibility of using ctDNA as a marker for preoperative staging, restaging after neoadjuvant chemotherapy, and monitoring for recurrence.
Head and neck cancers (HNSCC) are primarily squamous cell cancers represented by tumors of the upper aerodigestive tract. Locally advanced stages (stages III and IV) account for 50 to 70% of all presentations. The three main risk factors are smoking, alcohol and oropharyngeal infection with human papilloma virus (HPV). Apart from HPV status, there is no biomarker for the prognosis in HSNCC patients. Circulating Tumor Cells (CTCs) can provide "real-time" information on tumor behavior and are already used in various cancers (colon, lung). Their detection has limited sensitivity and biomarkers cannot be used for early diagnosis, but may be useful during follow-up to assess local, regional or metastatic early tumor recurrence. By using blood samples at different times (at diagnosis, after initial treatment and during follow-up), we will be able to measure the variation in quantification and establish a predictive role of these CTCs for the response to treatment. Our hypothesis is that CTCs may have a key role, in addition to clinical and radiological examination, in detecting early tumor relapse. We believe that the joint consideration of clinical parameters, treatment strategy and quantification of CTCs could optimize patient follow-up and management. The CTC extraction system, ClearCell® FX from Biolidics, is an automated microfluidic enrichment system. It has the advantage of recovering fully intact and viable CTCs from a standard blood sample. The gentle sorting principle allows to preserve cell integrity and thus the expression of surface antigens. The CTCs thus isolated can then be re-cultured or analyzed by immunostaining. This high-performance technique, in operation since December 2017 in the Biochemistry Department of Pr Claire Rodriguez-Lafrasse (HCL), has demonstrated its usefulness in lung cancer. Transcriptomic analysis of CTCs can be performed at the scale of a cell after isolation of the CTCs. CTCs can then be sequenced in RNAseq either in bulk (pool of cells) or cell by cell on our Illumina (Nextseq) sequencer, in order to define the heterogeneity of the tumor. Transcriptome analysis then provides information on the state of the cell as to its position in the epithelio-mesenchymal transition thanks to a molecular signature by phenotype. A priori-free characterization is therefore possible thanks to the RNAseq single-cell. This highly sensitive and innovative technique will allow the study of the gene expression profile of CTCs.
Through the screening of CTCs in patients with suspected liver cancer and liver tumor resection or liver transplantation, the number of CTCs in the blood of liver cancer patients before and after surgery is monitored, and the clinical application significance of CTCs in liver cancer screening and postoperative recurrence monitoring in liver cancer patients is evaluated.
Cetuximab to reduce the amound of circulating tumor cells in early stage NSCLC
More than 80% of patients with cancer will be exposed to anaesthesia at some point in their treatment. There is increasing evidence that perioperative events, including the type of anaesthesia drugs utilised, have an impact on cancer recurrence and metastases. Although potentially and theoretically curative, surgical resection, manipulation and trauma may disseminate tumour cells and reduce immunity. There have been a number of suggestions as to why cancer may be, paradoxically, worsened by surgery and what methods may be used to mitigate this. One of these is propofol based total intravenous anaesthesia (TIVA), whereby the traditional inhalational anaesthetic drugs are avoided. Commonly used inhalational drugs, such as sevoflurane and desflurane, are pro-inflammatory. Propofol, however, has anti-inflammatory and anti-oxidative properties, induces apoptosis and has specific inhibitory effects on tumour cell growth in vitro. Laboratory investigations, animal models, retrospective clinical studies and initial clinical research are producing evidence that inhalational anaesthesia facilitates tumour recurrence and metastasis, whilst TIVA can prolong survival. This randomised, controlled trial will look at the effects on DNA damage and biomarkers of immunity and inflammation of inhalational anaesthesia versus TIVA in patients undergoing surgery for hepatocellular carcinoma, a common tumour in the Southern Chinese population, for whom surgery is potentially-curative. It will focus on subjects undergoing open and laparoscopic hepatectomy and investigate changes in biomarkers of inflammation, immunity and gene expression from the patients' blood samples taken before, during and after surgery. Patients will also be followed-up for cancer recurrence, morbidity and five-year mortality. Results could represent a breakthrough in knowledge of how anaesthetic agents impact the results of cancer surgery, and have important implications for a more disease- sensitive approach to improving management and outcomes in these patients.
The prospective observational clinical study will recruit 50 metastatic nasopharyngeal carcinoma (mNPC) patients, detecting patient's chemosensitivity with the circulating tumor cells (CTCs) from peripheral blood and prdicting patient's treatment efficacy with CTCs dynamic change.
The purpose of this prospective, non-randomized, single-center pilot exploratory study is to investigate whether established circulating tumor cell (CTC) cultures have a similar response to targeted therapy treatment as the in vivo (patients') disease.
This study aims to evaluate the prognostic value of circulating tumour cells (CTC) in patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy due to gastrointestinal cancers that have spread to the peritoneum.