Active clinical trials for "Colorectal Neoplasms"

The purpose of this study is to determine efficacy of SB injection in Colorectal Cancer.

Up to 50% of patients with colorectal cancer (CRC) develop liver metastasis during the course of their disease. In 30-40% of patients metastasis is confined to the liver. In these patients R0-resection of metastases may contribute to marked improvement of overall survival. Primary resection of liver metastasis is possible in about 15-20% of patients (Scheele 2005, Petrelli 2005). Recent studies indicate that perioperative chemotherapy may improve survival after resection of liver metastases (Portier 2007, Nordlinger 2007). Nevertheless, there is evidence that 70-80% of patients have recurrent disease after resection of liver metastasis. Stratification for the risk of recurrence may be performed using the FONG-score (Fong 1999). This study is designed to investigate the efficacy of postoperative chemotherapy combined with an anti-EGFR treatment using panitumumab. The majority of patients present to the surgeon after chemotherapeutic pretreatment with various not necessarily standardized regimens. Also postoperative therapy after resection of liver metastasis is not a clearly defined standard of care in Germany. Based on the study by Nordlinger et al. an oxaliplatin-based regimen is chosen for postoperative therapy (Nordlinger 2008). For reasons of practicability mFOLFOX6 was selected as the chemotherapy backbone for additive treatment (Allegra 2010). Also, there is evidence that the combination of FOLFOX with panitumumab is associated with enhanced antitumor activity (Douillard et al. ESMO 2009). The experimental treatment arm will therefore evaluate the combination of FOLFOX plus panitumumab. Since in colorectal cancer monoclonal antibodies directed against the EGFR are not active in KRAS mutant patients, the experimental arm including panitumumab will only be performed in KRAS wild-type patients (Amado 2008). The planned study aims to assess the efficacy of postoperative therapy with FOLFOX plus panitumumab followed by maintenance with panitumumab for 3 months in KRAS wild-type patients, compared to the historical data for standard FOLFOX chemotherapy alone, which are verified by a randomised control group without the antibody. (Figure 1: Study Design). The study will allow preoperative treatment with regimens such as FOLFIRI, XELIRI, FOLFOX or XELOX +/-bevacizumab or +/- cetuximab. However, only those patients will be considered eligible who did not progress during preoperative therapy. After surgery, a treatment-free interval of at least 4 weeks, but no longer than 8 weeks will be granted. KRAS-wild-type patients (60% of all pts) will then be randomized in a 2:1 ratio to an experimental arm with FOLFOX + panitumumab or to a reference arm with FOLFOX alone. Combination treatment will be performed for a duration of 3 months, after which patients in the experimental arm will receive maintenance therapy with panitumumab for further 3 months. In the reference arm, treatment will, however, be ended after 3 months.

This study aims to use the corresponding pharmacogenetic analysis to increase the dose of irinotecan in the schemes commonly used standard chemotherapy in advanced colorectal cancer treatment first. The project aims to improve the therapeutic index of chemotherapy. This optimization is raised based on the administration of different doses of the drug depending on the genotype UGT1A1 gene. The research team proposes this project to demonstrate how the administration of high doses of irinotecan in the FOLFIRI scheme in patients with genotype UGT1A1 favorable (wild homozygous * 1 / * 1 and heterozygous * 1 / * 28), significantly improves the efficiency of the antineoplastic agent without significant increase in toxicity. Secondarily will assess the possible prognostic factors related to tolerance and efficacy. The primary objective is to evaluate the efficacy of high doses of irinotecan in the FOLFIRI scheme in patients with metastatic colorectal cancer with a favorable genotype UGT1A1 (wild homozygous * 1 / * 1 and heterozygous * 1 / * 28).

The immune response at primary tumor has a major role in the prognosis of colorectal cancer (CRC). Some studies suggest a prognosis value of cytotoxic T cell and memory T cells at primary tumor greater than tumoral stage. There is no work in the literature that has examined the prognosis value of the immune response in liver metastases. To study immune cells (histology) and inflammatory response (cytokines) in liver metastases is a challenge to understand the effectiveness of chemotherapy used in this situation. The chemotherapy used in liver metastases of colorectal cancer also have effects on non-tumoral liver tumor and therefore can interfere with postoperative complications of hepatic resection. Sinusoidal dilatation is present in 20% to 80% of patients who received oxaliplatin before hepatectomy. Steatosis is frequently observed after administration of 5-FU alone or in combination with irinotecan. This steatosis may also be accompanied by inflammatory lesions (steatohepatitis), especially after administration of oxaliplatin or irinotecan and is associated with increased postoperative mortality. The hepatic toxicity of new biological agents is not well known (cetuximab and bevacizumab). The mechanisms of chemotherapy-induced toxicities are currently unknown. The main objective is to analyze the profile of the immune response in liver metastases of CRC and find the link with the radiological response. Measurements will be made by quantitative RT-PCR on frozen liver biopsies. Secondary objective is to seek a correlation between the histological lesions induced by chemotherapy and non-invasive tests for liver fibrosis. The secondary endpoints are rate of immune cells, histologic response (percentage of tumor necrosis), disease-free survival, the non-invasive test of fibrosis, the chemotherapy-induced liver injury, cytokines and circulating angiogenic factors.

This is a prospective randomized trial that aimed to compare the short-term clinical outcomes and systemic inflammatory/cytokine responses of endoscopic submucosal dissection versus laparoscopic resection for early colorectal neoplasms that are not amenable to en bloc endoscopic resection with conventional techniques.

The purpose of this study is to investigate efficacy and safety of intra-operative chemotherapy with 5-FU for colorectal cancer patients receiving curative resection. The hypothesis is intra-operative intervention might be the best timing for cancer cells killing by cytotoxic agents, when most of residual cancer cells may get a rapid growth after tumor debulking and may become more chemotherapy-sensitive. A three-step procedure is designed for intra-operative chemotherapy with 5-FU of 1500 mg/m2, including step 1 of intraluminal 5-FU injection with 1000 mg/m2 at beginning of resection, step 2 of 200mg/m2 5-FU injection into portal vein system via mesentery vein after tumor removal and finish of bowel reconstruction, and step 3 of 300mg/m2 5-FU left into the abdominal cavity before incision closure. The controlled arm receive curative resection only. All the other treatments will stick to the guidelines.

the aim of this study is to observe the effect of irinotecan-based regimen in patients with advanced colorectal cancer.

Bevacizumab, a humanized monoclonal antibody against vascular endothelial growth factor (VEGF), combined with fluoropyrimidine-based chemotherapy is now the standard first and second-line treatment for metastatic colorectal cancer. The efficacy of bevacizumab with cytotoxic agents in the third-line treatment of patients with mCRC is still unknown.

RATIONALE: Monoclonal antibodies, such as cetuximab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Simvastatin may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Simvastatin may help cetuximab work better by making tumor cells more sensitive to cetuximab. Giving cetuximab together with simvastatin may kill more tumor cells. PURPOSE: This phase II trial is studying giving cetuximab together with simvastatin in treating patients with advanced or metastatic colorectal cancer.

Patient with multiple metastases, not eligible for surgery, might not profit from intensive chemotherapy regimens. Therefore less intensive regimens focusing on survival and disease control may be a better choice for first line treatment. Therefore this study investigates the combination of capecitabine and bevacizumab versus the combination of capecitabine, bevacizumab and irinotecan. In case of progressive disease, the therapy in patients treated with capecitabine and bevacizumab is intensified by adding irinotecan. Primary endpoint is time-of-failure strategy (TFS) comparing both treatment arms.