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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. S85 
    ISSN: 1530-0358
    Keywords: Longitudinal ulcers ; Aphthous ulceration ; Incidence ; Male-female ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract New diagnostic criteria for Crohn's disease and a review of Japanese epidemiologic studies are presented. New diagnostic criteria for Crohn's disease were established by the Research Committee of Inflammatory Bowel Disease, set up by the Japanese Ministry of Health and Welfare. For a definite diagnosis one of the following three conditions is required: 1) longitudinal ulcer or luminal deformity induced by longitudinal ulcer or cobblestone pattern, 2) intestinal small aphthous ulcerations arranged in a longitudinal fashion for at least three months plus noncaseating granulomas, and 3) multiple small aphthous ulcerations in both the upper and lower digestive tract not necessarily with longitudinal arrangement, for at least three months, plus noncaseating granulomas. Moreover, ulcerative colitis, ischemic enterocolitis, and acute infectious enterocolitis should be excluded. Data from the Japanese Ministry of Health and Welfare, in addition to data collected from two study groups, these being the two largest studies in Japan, are reviewed with regard to epidemiology. The number of patients with Crohn's disease has increased remarkably. The prevalence and the annual incidence of patients with Crohn's disease in Japan were estimated to be approximately 2.9 and 0.6 per 105 population in 1986, respectively, and 13.5 and 1.2 per 105 population in 1998. Characteristic features of Crohn's disease in Japan are that the male-female ratio exceeds 2, and that there is no second peak of incidence in the age group of 55 to 65 years. Clinically, Crohn's disease with only multiple small aphthous ulcerations, which is the earliest stage of the disease that is diagnosable, was found in 5 percent of patients.
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  • 2
    ISSN: 1530-0358
    Keywords: Microsatellite instability ; Telomere ; Telomerase ; Colorectal cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Two pathways have been proposed for the development of colorectal cancers: loss of heterozygosity and replication error. Colorectal cancers arising through the replication error pathway, like most hereditary nonpolyposis colorectal cancers, show microsatellite instability. It has been also reported that telomere shortening frequently occurs in colorectal cancers and that telomerase is often activated strongly in them. The aim of this study was to examine whether any relationships can be found among microsatellite instability, telomere length, and telomerase activity in colorectal cancers. METHODS: Genomic DNA was extracted from 55 invasive cancers and corresponding normal mucosas. Five microsatellite loci were analyzed by polymerase chain reaction. Telomere length was examined by Southern blot analysis. Telomerase activity was assayed by telomeric repeat amplification protocol with minor modifications. RESULTS: Microsatellite instability was found in 8 (14.5 percent) of 55 tumors, and all of them showed short telomeres. Furthermore, four high-frequency microsatellite instability tumors that showed microsatellite instability at more than two loci exhibited remarkably short telomeres. The microsatellite instability correlated significantly with frequency of telomere shortening (P=0.0183; Fisher's exact probability test), but not with strength of telomerase activity. CONCLUSION: The relationship identified by this study between microsatellite instability and telomere shortening might suggest some association between the DNA mismatch repair system and the telomere maintenance mechanism in colorectal cancers.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1530-0358
    Keywords: PTEN ; Cowden disease ; Gingival papilloma ; Esophageal papilloma ; Juvenile polyp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE:PTEN is a candidate tumor suppressor gene for mutations which are responsible for Cowden disease. Recently, it has been shown thatPTEN is mutated in several human neoplasms. To investigate the role ofPTEN in tumorigenesis, we screened its mutation in Japanese patients with gastrointestinal polyposis and various sporadic tumors. METHODS: The entire coding region ofPTEN was screened by single strand conformational polymorphism or direct sequencing for somatic mutations in 16 gingival papillomas, 4 juvenile polyps, 10 esophageal papillomas, and 20 colorectal cancers and for germline mutations in three patients with Cowden disease (including one with Lhermitte-Duclos disease) and one patient each with juvenile polyposis syndrome, Turcot's syndrome, and Cronkhite-Canada syndrome. RESULTS: Germline mutations were found in all cases of Cowden disease. One mutation was a nonsense mutation at codon 130 (CGA→TGA), and the other two were splice site mutations at the 5′ site of intron 4 and the 3′ site of intron 8. We could not detect germline mutations in other patients with gastrointestinal polyposis or somatic mutations in sporadic tumors. CONCLUSIONS: We confirmed previous reports that germline mutations inPTEN are responsible for Cowden disease. However, somatic mutations ofPTEN may not play a major role in tumorigenesis, at least in colorectal cancers, esophageal papillomas and gingival papillomas.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 40 (1997), S. S48 
    ISSN: 1530-0358
    Keywords: Crohn's disease ; Enteral nutrition ; Corticosteroid ; Elemental diet ; Hydrolyzed diet ; Polymeric diet ; Intestinal permeability ; Home enteral nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Indication for and an evaluation of enteral nutrition in Crohn's disease differ between Japan and western countries. PURPOSE: Japanese results are reported and differences are discussed. RESULTS: Enteral nutrition with an elemental diet is first-line therapy for active Crohn's disease in Japan. The remission induction rate of elemental diet therapy is approximately 80 percent, which is superior to steroids. Furthermore, elemental diet therapy induces radiographic and endoscopic remission. On the other hand, meta-analysis from randomized, controlled trials showed steroids to be more effective than enteral nutrition in western countries. The differences are considered to be the result of such differences as therapeutic duration of enteral nutrition, the composition of enteral diets used, criteria for remission, the quality of life score of a long-term fast with a nasogastric tube, medical care, and health insurance system. The main mechanism of the therapeutic effect of elemental diet is speculated to be attributable to removal of food antigens and decreases of secretion and motility (bowel rest) by very low fat. To prevent relapse and rehospitalization, home enteral nutrition is now used widely in Japan. The therapeutic effect is observed in patients with ileal involvement, and more than 1,200 kcal/day is more effective than a lower amount. CONCLUSION: Most Japanese studies were open-labeled, uncontrolled trials. We should conduct randomized, controlled trials comparing enteral nutrition with steroids during the active stage of Crohn's disease and home enteral nutrition with drugs in maintaining remission and investigate the therapeutic effect, quality of life, and costs.
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  • 5
    ISSN: 1530-0358
    Keywords: Ulcerative colitis ; Glucocorticoid receptor ; Glucocorticoid resistance ; Wholecell binding assay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: To clarify the relationship between the glucocorticoid receptor and the effectiveness of glucocorticoid therapy in patients with ulcerative colitis, we investigated the number and apparent dissociation constant of glucocorticoid receptor in peripheral blood mononuclear leukocytes of patients with ulcerative colitis. MATERIALS AND METHODS: Eleven patients with ulcerative colitis (5 who responded to intravenous glucocorticoids and 6 who did not) and ten control subjects were studied. The number and apparent dissociation constant of glucocorticoid receptor were measured using a whole-cell binding assay. Results were expressed as a median (interquartile range). RESULTS: The number of glucocorticoid receptors from the six nonresponders, five responders, and ten healthy controls were 4922 (range, 4484–5643), 3413 (range, 3183–4450), and 3610 (range, 2594–3979) binding sites/cell, respectively. The apparent dissociation constant of the glucocorticoid receptors from the nonresponders, responders, and healthy controls were 7.03 (range, 5.66–10), 4.27 (range, 4–5.13), and 6.18 (range, 5.86–6.74) nM, respectively. Nonresponders had a significant increase both in the number of binding sites and in the apparent dissociation constant compared with responders (P=0.045;P=0.029). CONCLUSIONS: The increased number and apparent dissociation constant of glucocorticoid receptor are closely associated with the effectiveness of glucocorticoid therapy. The measurement of the number and apparent dissociation constant of glucocorticoid receptor may be useful in predicting response to glucocorticoids.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1530-0358
    Keywords: Crohn's disease ; Bacterial overgrowth syndrome ; Hydrogen breath test ; Antibiotics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Bacterial overgrowth sometimes complicates the clinical course of Crohn's disease and may lead to inappropriate treatment. To clarify the effect of antibiotic therapy, we monitored the hydrogen concentration in expiratory breath after fasting. METHODS: We evaluated 18 patients (15 males; median age, 32.7; range, 22.3–60 years) for postoperative bacterial overgrowth symptoms and for intestinal dilation by plain abdominal x-ray. Five patients had ileitis and 13 patients had ileocolitis. Various intestinal resections were performed in all, and strictureplasties were done at the same time in 13 patients. The median postoperative period was 10.2 (range, 1.2–102) months. Nine patients, who had symptoms such as bloating, nausea, vomiting, or pain, were classified as the symptomatic group, whereas nine other patients, who had no symptoms, were classified as the symptom-free group. Sixteen patients who had undergone intestinal resections for noninflammatory bowel disease served as the control group. After overnight fasting, hydrogen concentration in end-expiratory breath was measured with gas chromatography. At the same time clinical examinations of white blood cell count, hemoglobin, total protein, serum albumin, iron, sialic acid, and C-reactive protein in the peripheral blood were performed. To assess the effect of antibacterial treatment, changes in symptoms were assessed in eight patients who received antibacterial treatment. Hydrogen concentration was measured repeatedly before and after treatment in six patients. RESULTS: The symptomatic group had an expiratory hydrogen concentration level significantly higher (median, 40; range, 20–139 ppm) than the control group (median, 3; range, 1–6 ppm) and the symptom-free group (median, 4; range, 1–10 ppm). After the antibiotic treatment the symptoms were improved in all of the patients, and the hydrogen concentration level was significantly reduced (median, 4.5; range, 2–13 ppm). CONCLUSIONS: Antibacterial treatment was useful in the postoperative patients whose assessments were complicated by bacterial overgrowth. Using a hydrogen breath test, bacterial overgrowth was effectively monitored and managed, effecting a change in clinical symptoms.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1436-2813
    Keywords: Turcot syndrome ; small intestinal invagination ; colonic obstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report herein the case of a 16-year-old boy diagnosed as having turcot syndrome, otherwise known as glioma-polyposis syndrome. The patient was transferred from the Department of Neurosurgery where he was undergoing investigation of a brain tumor, to the Department of Medicine for investigation of gastrointestinal symptoms. The patient was diagnosed as having Turcot syndrome, and was then transferred to the Department of Surgery for treatment of an obstruction in the sigmoid colon and small intestinal invagination. A subtotal colectomy with side-to-end ileoproctostomy and release of the invaginations was carried out. Multiple polyps were found in the colon, two of which, including a large polyp that obstructed the colonic lumen, were confirmed histologically to be adenocarcinoma. The remaining polyps were adenomas. A biopsy of the brain tumor confirmed a diagnosis of astrocytoma (WHO grade II). This case report describes the characteristic features of Turcot syndrome presented by this patient.
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  • 8
    ISSN: 1436-2813
    Keywords: psoas abscess ; retroperitoneal abscess ; abscess ; Crohn's disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report herein the cases of two patients with Crohn's disease complicated by a psoas abscess. The first patient was a 29-year-old man who underwent definitive surgery after acute inflammation had been controlled by nutritional therapy. In the second patient, a 37-year-old man, the abscess required drainage under local anesthesia prior to surgery. Both patients have been free from recurrence of any abdominal symptoms for about 2 years since undergoing surgery. Although psoas abscess is still regarded as a rare complication, with the increasing prevalence of Crohn's disease in Japan it has become one of the most important complications requiring surgical intervention.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2307
    Keywords: Inflammatory bowel disease ; ELAM-1 ; Endothelial cells ; Immunoelectron microscopy ; Neutrophils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Endothelial leucocyte adhesion molecule-1 (ELAM-1) is a rapidly inducible adhesion molecule for neutrophils in vascular endothelial cells. We investigated its immunohistochemical localization in 17 cases of inflammatory bowel disease. ELAM-1 was preferentially expressed in venules in actively inflamed mucosa and granulation tissue. Most capillaries were negative for ELAM-1. In areas with mild inflammation its expression diminished markedly and in normal mucosa of the colon and small intestine its expression was sparse. Electron microscopically, venules in active inflammation had swollen endothelial cells with well-developed rough endoplasmic reticulum. Immunoelectron microscopy revealed ELAM-1 localization along the luminal plasma membrane and in rough endoplasmic reticulum and round granules, findings suggestive of active production in endothelial cells. Furthermore, exocytosis of immuno-reactive substance into the lumen was confirmed. Our study suggests that venules in actively inflamed area play an important role in eliciting and/or maintaining acute inflammatory processes by active permeation of neutrophils from the blood stream into the tissue, and that ELAM-1 may be a secretory protein as well as a transmembrane receptor protein.
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  • 10
    ISSN: 1436-2813
    Keywords: Key Words: Turcot syndrome ; small intestinal invagination ; colonic obstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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