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PubMed2005

Epithelial cells and their neighbors I. Role of intestinal myofibroblasts in development, repair, and cancer.

Intestinal myofibroblasts are alpha-smooth muscle actin-positive stromal cells that exist as a syncytium with fibroblasts and mural cells in the lamina propria of the gut. Through expression and secretion of cytokines, chemokines, growth factors, prostaglandins, and basal lamina/extracellular matrix molecules, as well as expression of adhesion molecules and receptors for many of the same soluble factors and matrix, myofibroblasts mediate information flow between the epithelium and the mesenchymal elements of the lamina propria. With the use of these factors and receptors, they play a fundamental role in intestinal organogenesis and in the repair of wounding or disease. Intestinal neoplasms enlist and conscript myofibroblast factors and matrix molecules to promote neoplastic growth, carcinoma invasion, and distant metastases.

Cell Communication↗
PubMed1996

Suppression of carcinogenesis in the intestines of min mice by the soybean-derived Bowman-Birk inhibitor.

We have performed experiments to determine whether the soybean-derived protease inhibitor, Bowman-Birk inhibitor (BBI), has the ability to affect intestinal carcinogenesis in Min mice. Min mice have an autosomally dominantly inherited predisposition to multiple intestinal neoplasms and are known to have a very high spontaneous rate of tumor development in both the small intestine and colon. BBI was administered in the diet as BBI Concentrate (BBIC), the form of BBI which is currently being evaluated in human trials as a cancer chemopreventive agent. We observed that 0.5% dietary BBIC led to a 42-50% reduction in the number of tumors/mouse in the small intestine and colon and a 41% reduction of tumorigenesis in the colon when the data are analyzed in terms of the fraction of mice bearing tumors. Thus, tumor-development in both the small intestine and colon of Min mice can be significantly suppressed by BBIC, despite the fact that the animals carry a predisposing mutation that leads to a markedly increased intestinal tumor incidence and mortality rate.

Animals↗