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New therapeutic targets in the treatment of ulcerative colitis
November 14, 2007Social, environmental and dietary changes are associated with the changes of disease spectrum in a country. Ulcerative colitis has become a commonly seen disease in China, probably due to extensive consumption of Western foods in recent years. Unfortunately, the etiology and pathogenesis of ulcerative colitis have not been clarified yet. Therefore, no effective etiological treatment is available at present. But a recent study published in issue 44 of the World Journal of Gastroenterology may offer new insight into this difficult-to-treat disease.
A research team from the First Affiliated Hospital of Dalian Medical University's Department of Gastroenterology, China, led by Professor Ying-De Wang, investigated the expression of matrix metalloproteinase-1 (MMP-1) and tumor necrosis factor- ¦Á (TNF-alpha). MMP-1 is a peptidase that degrades the extracellular matrix in the colonic mucosa, while TNF-alpha is an important and harmful inflammatory cytokine produced in macrophages in colon. The research team found that both MMP-1 and TNF-alpha were over expressed in the colonic mucosa of patients with ulcerative colitis. The over expressed MMP-1 excessively degrades the extracellular matrix, and subsequently damages the colonic mucosa and causes ulceration and inflammatory changes in ulcerative colitis, and the over expressed TNF-alpha directly damages the colon mucosa. MP-1 and TNF-alpha proteins have the so-called ˇ°synergistic actionˇ±. The study revealed that the excessively expressed TNF-alpha stimulated MMPs secreting cells to produce more MMP-1, aggravating the mucosa damage. Meanwhile, MMP-1 promoted secretion of TNF-alpha in a positive feedback manner to cause further injury in the mucosa of colon. So it is very likely both MMP-1 and TNF-alpha play a central role in the development of ulcerative colitis.
The results of this study will undoubtedly bring about a new round of research on the pathogenesis and new methods of treating ulcerative colitis. This will be a step toward a promising future in the battle against ulcerative colitis.
World Journal of Gastroenterology
Ulcerative Colitis Current Events and Ulcerative Colitis News RSSLargest gene study of childhood IBD identifies 5 new genes
In the largest, most comprehensive genetic analysis of childhood-onset inflammatory bowel disease (IBD), an international research team has identified five new gene regions, including one involved in a biological pathway that helps drive the painful inflammation of the digestive tract that characterizes the disease.
M. D. Anderson redefines screening guidelines for breast, cervical and colorectal cancers
Drawing on years of experience in cancer research and patient care, The University of Texas M. D. Anderson Cancer Center released today the most comprehensive, risk-based screening guidelines publicly available to date for breast, cervical and colorectal cancers.
Probiotic Found to Be Effective Treatment for Colitis In Mice
The probiotic, Bacillus polyfermenticus, can help mice recover from colitis, a new study has found.
Discovery of genetic defect may lead to better treatments for common gut diseases
New findings related to an uncommon genetic disorder may impact the diagnosis and treatment of inflammatory bowel disease (IBD), the most common chronic gastrointestinal illness in children and teens. Two million Americans have IBD which involves inflammation of the gastrointestinal tract.
Oxidized form of a common vitamin may bring relief for ulcerative colitis
New research published in the Journal of Leukocyte Biology finds retinoic acid may alleviate ulcerative colitis and similar irritable bowel diseases.
Promising new target emerges for autoimmune diseases
University of Michigan scientists say they have uncovered a fundamentally new mechanism that holds in check aggressive immune cells that can attack the body's own cells.
Subclinical markers predict relapse in juvenile idiopathic arthritis post methotrexate withdrawal
Elevated levels of the inflammatory biomarkers Myeloid Related Protein (MRP) 8/14 predict an increased risk of relapse following withdrawal of methotrexate (MTX) therapy in children with juvenile idiopathic arthritis (JIA) who have achieved inactive disease status.
Electronic Pill Shows Its Smarts by Measuring pH Levels in Digestive Tract
An electronic diagnostic tool called the SmartPill is swallowed by patients in order to take measurements as it travels through the gastrointestinal tract.
Enzyme involved in inflammatory bowel disease discovered at Penn State College of Medicine
Researchers at Penn State College of Medicine, working with biochemists, geneticists and clinicians at the University of Bern, Switzerland and in the United Kingdom, have discovered an enzyme that has a key role in inflammatory bowel disease (IBD).
UCLA cancer researchers first to link intestinal inflammation with systemic chromosome damage
UCLA scientists have linked for the first time intestinal inflammation with systemic chromosome damage in mice, a finding that may lead to the early identification and treatment of human inflammatory disorders.
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