View clinical trials related to Colorectal Cancer.
Filter by:The main objective of this pilot study is to implement an awareness campaign for colorectal cancer screening in the workplace, in partnership with the staff of the occupational health service of one of the largest companies in Maine-Loire , and to evaluate the impact of this action on the participation rate of colorectal cancer screening among employees.
MSI (Microsatellite Instability) colorectal cancer (CRC) show improved survival, are less prone to metastasis and show poor response to chemotherapy (compared to MSS tumors). The underlying reasons for these characteristics are still not understood and no specific therapeutic approach for MSI colon tumours (15% of CRC overall) has yet been developed. The MSI process is oncogenic when it affects DNA repeat sequences that have a functional role, e.g. Small Coding Repeats (SCR). MSI also frequently affects Long Non-Coding Repeats (LNCR) in tumour DNA. In contrast to SCR, only a few LNCR are endowed with biological activity. Consequently, this area has received very little attention. Our group recently identified HSP110 mutant chaperone protein in MSI CRC that was generated by somatic deletion of a LNCR. Of interest, HSP110 mutant (due to exon skipping) have anti-oncogenic properties and the survival of MSI CRC patients receiving chemotherapy is positively associated with HSP110 mutations in tumour DNA. The aim of the current project is to identify additional clinically relevant MSI-associated splicing aberrations due to mutations in LNCR located in splice acceptor sites. The four main steps are as follows: 1. To identify exon/intron sites affected by aberrant splicing events due to MSI in CRC . All RNASeq data will be exploited to identify recurrent splicing aberrations (mostly exon skipping) that occur specifically in MSI colon tumours; 2. To investigate for possible functional links between MSI and any detected aberrant splicing events . All specific aberrant splicing events detected by RNAseq in MSI CRC samples will be first confirmed (quantitative RT-PCR) in order to eliminate false positive cases. For validated exon candidates, the allelic profiles of adjacent intronic LNCR will be analysed (PCR and fluorescence genotyping) in CRC cell lines and primary tumours (MSI and MSS), as well as in matching normal mucosa samples in order to assess their polymorphic status; 3. To identify splicing events and LNCR mutations with clinical relevance in MSI CRC patients . All LNCR with a confirmed role in gene splicing in MSI CRC will be analysed. The clinical relevance of candidate genes will be assessed using multivariate survival regression models for Relapse- Free Survival, with interaction terms (response to chemotherapy); 4. To initiate functional studies on a limited number of clinically relevant, cancer-related genes whose splicing is perturbed in MSI cancer cells, and to develop biological tools to simplify screening in future clinical assays Similar to HSP110, we will focus on 4 or 5 mutant proteins that are promising drug therapeutic targets. Functional assays will be developed to further elucidate their role in the pathophysiology of MSI tumours. We also aim to develop biological tools for these candidate genes, such as the detection of wild-type or mutant proteins by immunohistochemistry.
This study is designed to evaluate the short-term and long-term results after three-port laparoscopic surgery for colorectal cancer（TLSC） compared with conventional laparoscopic surgery for colorectal cancer（CLSC）.
The study investigators hypothesize that prophylactic HIPEC is feasible and well tolerated in patients with colorectal cancers with high-risk of developing peritoneal recurrence. The aim of the pilot study is to test the feasibility of performing prophylactic HIPEC for colorectal cancer patients at high-risk of developing peritoneal recurrence in our institution, and determine the morbidity associated with such a procedure. Patients with high-risk of developing peritoneal recurrence are defined as patients with 1. tumours involving the serosa and adjacent viscera (i.e. T4 cancers) 2. krukenburg tumours (i.e. ovarian metastases) 3. perforated tumours 4. positive peritoneal fluid cytology 5. minimal synchronous PC (nodules <1cm in the omentum and/or close to the primary tumour). The study investigators plan to assess feasibility according to 1. The number of patients completing the treatment 2. Time to adjuvant systemic chemotherapy, to evaluate if there is delay to adjuvant treatment Morbidity will be measured according to the Clavien-Dindo Classification, and graded according to low versus high grade morbidity. If prophylactic HIPEC is shown to be feasible, with acceptable morbidity, the investigators aim to carry out a randomized controlled trial to determine the effectiveness of prophylactic HIPEC in preventing the development of peritoneal metastases in patients with colorectal cancer at high risk of peritoneal recurrence.
This study is to evaluate circulating tumor DNA (ctDNA) as a predictive and surveillant method for tumor recurrence in stage II and III colorectal cancer (CRC).
The primary objective is to determine the sensitivity and specificity of two Colorectal Cancer (CRC) screening methods, including stool DNA test and blood mRNA test, for colorectal cancer in Chinese population, with colonoscopy as reference method. Lesions will be confirmed as malignant or precancerous by colonoscopy and histopathologic examination. The secondary objective is to compare the performance of these two CRC screening methods to a commercially available FIT assay, both with respect to cancer and advanced adenoma. Lesions will be confirmed as malignant or precancerous by colonoscopy and histopathologic examination.
This is an Exploratory Clinical Trial Study on Apatinib in the Treatment of Metastatic Colorectal Cancer Who Have Progressed after Standard Second Line Therapy.
To evaluate the emergence of RAS mutation in patients with metastatic colorectal cancer, circulating free DNA will be analyzed using mass spectrometric genotyping in subjects during cetuximab treatment. The hypothesis of this study is that acquired RAS mutation is responsible for the resistance to cetuximab treatment in wild-type colorectal cancer. The usefulness of liquid biopsy to monitor dynamic genetic alterations in colorectal cancer during treatment will also be investigated in this study.
The purpose of this study is to confirm the safety and efficacy of Apatinib plus S-1 as the Therapy of Advanced Colorectal Cancer.
Colonic microbiome has been found to contribute to the development of colorectal cancer. We speculate that gut microbiota related to colorectal cancer relapse after curative treatment. This study aim to discover if any difference of gut microbiota exist in patients who suffer from cancer relapse compared with patients who do not. Finally develop patient-centred programmes of surveillance protocols base on microbiota analysis.