View clinical trials related to Colon Cancer.
Filter by:This clinical trial will investigate the ability of plant exosomes to more effectively deliver curcumin to normal colon tissue and colon tumors. Curcumin is the yellow pigment of turmeric, a natural product with diverse biological activities. Exosomes are small endosome-derived vesicles (50-100 nanometers [nm] in size). Previous clinical trials conducted with oral curcumin have demonstrated only limited bioavailability even at very high doses of 8-12 grams per day. This trial plans to address this problem of curcumin delivery by using plant exosomes to deliver the drug to colon tumors and normal colon tissue.
The concept of breath testing for various diseases has been around since ancient greece. It has been hypothesized that cancer is generating a unique pattern of compounds in patients' breath. This study is trying to characterize a novel system, based on nanoparticles technology, for cancer diagnosis through breath samples.
Background: - The experimental cancer treatment drug AZD6244 has been shown to block signals that tell cancer cells to grow. Cetuximab, a drug approved to treat cancer of the head, neck, colon, and rectum, also blocks signals that tell cancer cells to grow. Researchers are investigating the highest safe dose of AZD6244 to give with cetuximab, and will also investigate the effectiveness of this drug combination in individuals who have colorectal cancer that involves a particular protein known as the K-RAS protein. Cetuximab is not used to treat colorectal cancer with K-RAS tumors because it has not been shown to be effective, but researchers believe that adding AZD6244 to cetuximab may improve how well cetuximab works, even in people with K-RAS tumors. Objectives: - To evaluate the safety and effectiveness of AZD6244 in combination with cetuximab for solid tumors that have not responded to standard treatment. - To evaluate the safety and effectiveness of AZD6244 in combination with cetuximab for colorectal cancer that involves the K-RAS protein and has not responded to standard treatment. Eligibility: - Individuals at least 18 years of age who have been diagnosed with solid tumors that have not responded to standard treatment. - Individuals at least 18 years of age who have been diagnosed with colorectal cancer that has not responded to standard treatment. Design: - This protocol will involve two separate studies: an initial study to establish the highest safe and effective dose of AZD6244 and cetuximab in individuals with solid tumors, and an expansion study of AZD6244 and cetuximab in individuals with colorectal cancer involving the K-RAS protein. - Participants will be screened with a full medical history and physical examination, blood samples, imaging studies, and other tests as required by the researchers. - AZD6244 is a capsule to be swallowed once or twice a day, every day, with water on an empty stomach. Cetuximab will be given intravenously once a week, over 2 hours for the first dose and over an hour for every following dose. This combination of daily AZD6244 and weekly cetuximab will be repeated in 28-day cycles of treatment. Participants will keep a diary to record the time of taking AZD6244 each day, as well as any side effects. - Participants will have frequent blood tests and other exams during the first cycle of treatment, up to five visits to the National Institutes of Health (NIH) and other visits to their local doctor to in the first 28-day cycle. - During subsequent cycles, participants will have four visits to NIH and four visits to your local doctor for examinations, blood tests, and imaging studies. - Participants may continue to receive the AZD6244 with cetuximab for up to 6 cycles, until the tumor grows, unacceptable side effects development, or the participant or participant's doctor decides to stop participation. There will be a final study visit that repeats the procedures performed during the screening visit....
The proposed study aims to investigate how the administration of a drug known to reduce inflammation in humans, Celecoxib, will effect the peri-operative inflammatory response of a patient undergoing primary tumor resection surgery for colon cancer. The proposed project is an exploratory study, and will use data from blood samples and tumor samples to attempt to elucidate the immune and inflammatory response in colon cancer patients undergoing primary resection of their tumors.
Recently the general medical literature has become aware that the use of certain long-acting insulin analogues could potentially increase cancer risk.During the last few years the investigators group generated information of both scientific and clinical relevance on the proliferative and anti-apoptotic actions of insulin analogues. The goal of this project is to evaluate the hypothesis that the proliferative and signalling activities elicited by insulin analogues may have a impact on tumor behavior. In this study the investigators will asses the biological actions of insulin analogs in primary tumor cells of endometrial and colon cancer.
In leukocytes of patients undergoing adjuvant chemotherapy for colon cancer treatment: a)identify genes modulated by oral supplementation of zinc; b) evaluate the effects of oral zinc supplementation on humoral immunity and neutrophil function. The study will be conducted on 30 adult patients aged grater than 18 years, of both genders who have undergone surgical resection of colonic neoplastic lesions without metastatic lesion. Patients will be randomized into two groups, with the first (Group QT Zn, n = 15) receive 70 mg/d of zinc for 16 weeks and the second will receive placebo (QT Placebo Group, n = 15). The study will also include 30 healthy volunteers who receive supplementation of 70 mg/d of Zn (C Zn group, n = 15) or placebo (Group C Placebo, n = 15). Zinc supplementation or placebo for all study groups will start two days before the volunteers received the pneumococcal vaccine, polyvalent 23. Fifteen days after vaccination, patients begin chemotherapy as pre-established criteria by the Oncology Service. Will be monitored the parameters of nutritional status (anthropometry, bioelectrical impedance, food intake, and laboratory tests) adverse effects, according to rules of the CTCAE. In the evaluation of humoral immunity, antibodies opsonization and in the pneumococcal polysaccharide will be measured. Will be evaluated the function of neutrophils by measuring DNA NETs and quantified calprotectin and elastase released in the culture supernatants of activated neutrophils. RT-qPCR will be done of genes differentially expressed(DEGS) on activated leukocytes. In six volunteers from each group will be analyzed global gene expression from RNA extracted from leukocytes by microarray; will be detected and correlated the molecular pathways modulated by zinc by MetaCore software (GeneGo). The DEGS will be validated by RT-qPCR.
It is particularly important that thorough gut cleansing is achieved prior to the colonoscopy for the procedure to be successful. Polyethylene glycol plus electrolyte (PEG+E) solutions are well established as safe and effective agents for gut cleansing and Norgine has successfully developed a low volume (2 litre) PEG+E gut lavage solution. The efficacy and safety of this solution is similar to the standard 4 litre PEG+E, but with improved patient acceptance. Tolerance, acceptability and satisfaction with the cleansing agent plays an important role in subjects' compliance with gut preparation procedure. The study medication NRL0706 is identical to the PEG+E-containing gut lavage solution commonly used in clinical practice, with the exception that the flavour has been modified from lemon to orange. This study is to investigate the tolerability, acceptability, safety and efficacy of a single dose of NRL0706 (MOVIPREP Orange) in subjects without gastrointestinal symptoms undergoing colonoscopy for colon cancer screening.
Colorectal cancer is the third most common form of cancer found in the United States. To date surgical resection provides the best chance for cure. Unfortunately, despite "curative" surgery, tumor recurrences develop in 30-40% of patients from either unforeseen residual metastases or from viable tumor cells shed into the circulation before or at the time of surgery. There is evidence from both humans and mice suggesting that tumor growth is stimulated after surgery for a period of time. This study calls for the administration of a green tea extract and a milk thistle extract, two orally ingested supplements, during the week immediately before and weeks after your surgery. It is not the current standard of care to give anti-cancer drugs during the perioperative period. The basic idea behind this study is that it should be beneficial to inhibit cancer growth in the days leading up to and following surgery. Why is this the case? It makes sense to limit or inhibit tumor growth before surgery with drugs provided it can be done safely and does not interfere with the surgery. It is also logical to give anti-cancer drugs after surgery because, unfortunately, about 35 percent of colorectal cancer patients, after resection, have hidden tumor cells that remain in the body. There is also strong human evidence that tumor growth is stimulated during the first month after tumor resection as a result of the surgical injuries and the healing process. Therefore, there is good reason to give anti-cancer drugs as soon as possible after surgery in order to offset some of surgery's negative effects. Although both supplements have been given safely to a wide variety of patients with a number of different medical problems, the two supplements together have never been given to cancer patients during the weeks just before and following surgery. The researchers hypothesize that the administration of these two supplements together will be safe in the period surrounding colorectal cancer surgery.
A prospective, randomized controlled study, using stable isotope methodology, is proposed to determine whether an oral nutrition support regimen, containing pressurized whey protein and glucose, is more effective at normalizing the metabolic response to surgery than a standard peripheral parenteral nutrition (PPN) support regimen, containing amino acids and glucose, in colorectal surgical patients studied before and after surgery. The effectiveness of the nutrition support regimens will be determined by: whole body protein balance, synthesis rates of hepatic secretory proteins, resting energy expenditure and substrate utilization, as well as circulating metabolites concentrations.
Chromoendoscopy (that involves spraying of dyes over the colonic mucosa) combined with magnification has been utilized for polyp histology identification. Pit patterns on the surface of polyps described by Kudo et al have been shown to have a high diagnostic accuracy in differentiating the polyp types (18, 19). NBI, that is also referred to as "electronic chromoendoscopy" is another technique that has been evaluated for polyp histology identification by highlighting the superficial mucosal and vascular architecture (15, 20, 21). pCLE is another novel addition to the technologies aiming to accomplish in vivo histologic diagnosis with a high degree of accuracy. The pCLE system has three major components (Mauna Kea Technologies, Paris, France). The first is the confocal miniprobe made of approximately thirty thousand optical fibers bundled together and terminated by a distal microsystem. The images obtained have a lateral resolution of 1µm, an axial resolution of 10 µm and a maximum field of view of 240 µm. The depth of observation is from 55 to 65 µm. The miniprobe tip diameter is 2.5 mm and can be passed through the accessory channel of any standard endoscope. The second is the laser scanning unit (excitation wavelength - 488 nm) that combines the functions of laser light illumination and rapid laser scanning, enabling a frame rate up to 12 images per second and signal detection. The third is the control and acquisition software for real time image reconstruction, immediate sequences display and post-procedure analysis and editing tools. Once an area of interest (e.g. a polyp) is identified, 5 ml of 10% fluorescein sodium is injected intravenously; the confocal probe is passed through the accessory channel of the endoscope and placed against the lesion to obtain several high-quality images and video sequences. In a study by Buchner et al from the Mayo Clinic, Jacksonville, (22) this system was used to evaluate confocal images of 37 polyps from 25 patients in a blinded fashion without the knowledge of their histologic diagnosis or endoscopic appearance. The investigators developed the following criteria that were suggestive of neoplastic polyps: villiform pattern, nuclear characteristics - oval/irregular nuclear shape and increased number of nuclei. These features had a sensitivity of 82.6%, specificity of 92.9% and accuracy of 86.5% for the characterization of neoplastic polyps. Similarly, Meining et al (23) have also evaluated criteria for differentiating neoplastic from benign lesions in the colon with encouraging results. The investigators hypothesize that pCLE will have a high rate for accurate characterization of polyp histology real time during colonoscopy