Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0699790 (colon cancer)
 28,837 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Dietary fiber and fiber supplements are reviewed, with particular emphasis on their sources, composition and properties; physiological actions on gastrointestinal functions; and uses in gastrointestinal disease states (functional bowel disease, diverticular disease and other conditions). Adverse effects and contraindications, and the hypothesis of diet's effect on colon cancer also are discussed. Dietary fiber supplements may relieve symptoms of constipation, spastic colon, and diverticular disease; in the two latter disorders, colonic pressure relationships are altered. It is concluded that current evidence does not support other therapeutic uses for dietary fiber sonstituents, except possibly in patients with anal fissures and hemorrhoids, which can be helped by the passage of a softer stool.
 ...
PMID:Drug therapy reviews: dietary fiber and fiber supplements in the therapy of gastrointestinal disorders. 34 84

The prevalences of bowel diseases (hemorrhoids, appendicitis, polyps, ulcerative colitis, irritable bowel syndrome, diverticular disease, and colon cancer) are similar in South African whites and in populations of prosperous western countries. Among rural South African blacks with a traditional life style, these diseases are very uncommon or almost unknown. Among the urban South African blacks with a partially westernized life style, the diseases remain uncommon. Frequencies of appendectomies and colon cancer in urban blacks have increased little during the last three decades, although an increase undoubtedly has occurred in the frequency of diverticular disease. Frequencies of bowel diseases in South African Indian and colored (Eurafrican, Malay) populations are intermediate. Because the diseases are almost entirely of environmental causation (due to principally to changes in diet), prevalences almost certainly will increase in blacks, Indians and coloreds, as their way of life becomes further westernized.
 ...
PMID:Epidemiology of noninfective intestinal diseases in various ethnic groups in South Africa. 44 96

The sample population in this initial case control study of the adenosine diphosphate ribosyl transferase (ADPRT) response of inflammatory bowel disease patients included: 23 patients with ulcerative colitis (UC)-active and inactive, 13 patients with Crohn's disease (CD)-active and inactive, 14 first degree relatives of UC and CD patients, and 19 age-matched controls. Adenosine diphosphate ribosyl transferase activity was determined after one hour incubation with 1% plasma (the constitutive value) or with 1% plasma and 100 microM H2O2 (the activated value) with the resulting difference designated as the induced value. Statistically significant decrease in ADPRT activity was found for the constitutive, activated and induced values in human mononuclear leucocytes of UC and CD patients, compared with controls. The values in the first degree relatives of UC and CD patients were not significantly different from either the control or disease populations, indicating an intermediate ADPRT response. These results may be related to the nature of the immunological response of IBD patients and comparable with similar findings in other diseases with known DNA repair deficiencies--for example, colon cancer.
 ...
PMID:Hydrogen peroxide induced adenosine diphosphate ribosyl transferase (ADPRT) response in patients with inflammatory bowel disease. 314 30

The irritable colon syndrome is a very common disorder with no serious sequelae. The cause is unknown but low dietary bulk and psychological factors are believed important. Sufferers may experience various combinations of diarrhea, constipation and abdominal pain. The mechanisms are obscure but abnormal colon motility has been amply demonstrated. Serious organic diseases such as colitis and carcinoma of the colon must be firmly excluded. Treatment consists of sympathetic explanation and reassurance, increased dietary bulk and occasional judicious use of antispasmodic agents.
 ...
PMID:The irritable colon. 461 5

Approximately 60% of sera from ulcerative colitis (UC) patients contains Igs reactive with neutrophil components, raising the question of the origin of these anti-neutrophil cytoplasmic Abs (ANCA). Our assertion that ANCA is a marker for a mucosal disease-related immune response predicts the existence of ANCA producing B cell clones in the lamina propria lymphocyte (LPL) fraction of UC patients. This hypothesis was tested by examining 12-day culture supernatants of LPL ANCA expression. LPL were isolated from surgically removed mucosa from patients with UC, Crohn's disease (CD), and diverticulitis. Normal mucosa was obtained from accident victims or normal margins of colon cancer resections. Supernatants were assayed by a fixed neutrophil ELISA. The ANCA staining pattern of supernatants expressing ANCA, as determined by ELISA, was assessed by indirect immunofluorescent staining of alcohol-fixed neutrophils. ANCA was found in 70% of culture supernatants from UC LPL fractions. In contrast, only approximately 11% of supernatants from CD and diverticulitis/normal (noninflammatory bowel disease (IBD)) LPL displayed ANCA binding. A perinuclear (pANCA) staining pattern was obtained with 70% of ANCA-expressing UC LPL supernatants, whereas ANCA-expressing CD and non-IBD LPL supernatants displayed a cytoplasmic reaction. PBL and mesenteric lymph node lymphocytes lacked spontaneous pANCA production, and pANCA production from PBL was not inducible. These findings indicate the existence of pANCA-producing B cell clones in mucosal lesions of UC patients and support our hypothesis that pANCA production is a consequence of a mucosal immune response specific to UC.
 ...
PMID:Perinuclear anti-neutrophil cytoplasmic antibodies are spontaneously produced by mucosal B cells of ulcerative colitis patients. 767 39

Chronic diarrhea is defined as the passage of more than 200 g of stool per day for more than three weeks. This condition may result from decreased absorption of gastrointestinal contents or increased fluid secretion into the bowel. Although chronic diarrhea can have many etiologies, irritable bowel syndrome, lactose intolerance, dietary factors, inflammatory bowel disease and colon cancer are the causes most frequently encountered in primary care practice. An orderly work-up, beginning with a complete history an a thorough physical examination, is essential. Whenever possible, treatment should be directed at the underlying cause of the diarrheal condition. If the diarrhea persists and the etiology remains obscure, administration of opiates or bile-sequestering agents often is helpful in alleviating symptoms. New approaches to decreasing secretions, such as the use of clonidine therapy, are being studied.
 ...
PMID:Chronic diarrhea: evaluation and treatment. 824 77

A high-fat and low-fiber diet is regarded as a major risk factor for colon cancer by increasing luminal contents of secondary bile acids. Calcium, on the other hand, has been implicated as a possible preventive agent in colon tumor development. In in vitro studies with human colonic epithelium, incubation with the secondary bile acid deoxycholic acid (DCA) induced hyperproliferation of colonic crypt cells which is regarded as a sign of preneoplastic transformation. In the present study the effects of calcium chloride (CaCl2) on DCA-induced hyperproliferation were tested at different stages of DCA-induced cell injury. Colonic biopsies from 36 patients (no tumors, polyps or IBD) were incubated with CaCl2 (1 and 10 mM) and 5 microM DCA which was added to the incubation medium either together with (experiment A), after (experiment B), or before CaCl2 (experiment C). Coincubation of the biopsies with DCA and 10 mM CaCl2 at the same time (experiment A) resulted in a significant reduction of whole crypt labeling index by 12% (p < 0.05), whereas in the other incubation experiments no significant growth-inhibitory effects could be demonstrated for CaCl2. These findings may best be explained by the formation of calcium-bound bile acid salts which lost most of their toxicity for the colonic cells.
 ...
PMID:Effects of calcium and deoxycholic acid on human colonic cell proliferation in vitro. 942 94

PSC is the most common of the clinically significant hepatobiliary diseases seen in association with IBD, with an incidence that varies from 2.5% to 7.5%. Conversely, 50% to 75% of patients with PSC have IBD. This high degree of association suggests a common pathogenetic mechanism; however, no causal relationship has been established. The etiopathogenesis of PSC remains poorly understood, despite a large number of studies looking at differing hypotheses. The diagnosis is usually established by cholangiography. Liver biopsy can sometimes be helpful in diagnosing pericholangitis. There is a significant overlap of the histology with chronic hepatitis. Serum markers have been studied for diagnosing PSC, particularly for early diagnosis of cholangiocarcinoma, but none have shown the high sensitivity and specificity needed to use them clinically. PSC usually progresses insidiously and eventually leads to cirrhosis. Despite progress in early recognition, optimal management of patients with PSC remains a challenge requiring a multidisciplinary approach among hepatologists, endoscopists, surgeons, and interventional radiologists. Colectomy for ulcerative colitis does not alter the natural history of PSC. There is a high (10% to 15%) incidence of cholangiocarcinoma in patients with PSC. This incidence along with the risk of colon cancer in patients with ulcerative colitis makes it necessary to follow these patients closely. A number of pharmacologic therapies have been evaluated, but none has proven successful in slowing the progression of PSC or prolonging survival. Endoscopic therapy has a proven utility in treating complications of recurrent cholangitis or worsening jaundice in the setting of a dominant stricture, but endoscopy has not been shown to improve survival or decrease the need for liver transplantation. Liver transplantation is life-saving for patients with advanced PSC. Pericholangitis, gallstones, and chronic hepatitis are additional disorders noted in association with IBD, but they are much less common and easier to manage than PSC.
 ...
PMID:Hepatobiliary manifestations of inflammatory bowel disease. 1037 79

Ulcerative colitis and colonic Crohn's disease (together known as inflammatory bowel disease or IBD) are both associated with increased risk for colorectal cancer. Although it is customary to emphasize differences in the biology of IBD-associated and sporadic colon cancer, we believe these are far outweighed by the similarities. These similarities suggest that they might have similar pathogenic mechanisms. Because the normal colon is arguably in a continual state of low-grade inflammation in response to its microbial flora, it is reasonable to speculate that both IBD-associated and sporadic colon cancer might be the consequence of bacteria-induced inflammation.
 ...
PMID:Inflammation and colorectal cancer: IBD-associated and sporadic cancer compared. 1179 61

Digestive problems in women are common and sometimes debilitating. Twenty percent of women suffer from irritable bowel syndrome, 20% have constipation, and all American women will need screening for colon cancer, the number two cause of cancer death in women. This article reviews management of these disorders as well as lower gastrointestinal symptoms associated with menses, hysterectomy, fecal incontinence, and rectal bleeding.
 ...
PMID:Women's colonic digestive health. 1185 29


1 2 3 4 5 6 7 Next >>