TY - JOUR
T1 - A novel human macrophage-derived intestinal mucin secretagogue
T2 - Implications for the pathogenesis of inflammatory bowel disease
AU - Sperber, Kirk
AU - Ogata, Shunichiro
AU - Sylvester, Clewert
AU - Aisenberg, James
AU - Chen, Anli
AU - Mayer, Lloyd
AU - Itzkowitz, Steven
PY - 1993/5
Y1 - 1993/5
N2 - Background: A novel 68-kilodalton macrophage-derived protein (MMS-68) stimulating mucin release from respiratory epithelial cells has previously been described. In this study, the effect of MMS-68 on mucin release from intestinal epithelial cells was determined. Methods: Colonic epithelial cells isolated from normal colon, ulcerative colitis, Crohn's colitis, and cells from three colon cancer cell lines were labeled with [3H]-glucosamine and stimulated with MMS-68. High molecular weight glycoproteins were precipitated and counted. Results: In all of the cells tested, MMS-68 enhanced mucin secretion by 1.46-2.0-fold above control values, comparable to the level achieved with carbachol (10-5 mol/L). Coincubation with anti-MMS-68 monoclonal antibody 1D-10 blocked this bioactivity. Freshly isolated intestinal macrophages reacted with monoclonal antibody 1D-10. Immunofluorescent staining of frozen sections revealed the presence of MMS-68-producing cells (macrophages) in the lamina propria of normal colon and Crohn's colitis, with weaker expression in ulcerative colitis mucosa. Conclusions: Intestinal macrophages produce a novel mucin secretagogue, which is as potent as carbachol for stimulating mucin secretion from colonic epithelial cells. This factor may explain, in part, the alterations in mucin secretion often seen in inflammatory bowel disease.
AB - Background: A novel 68-kilodalton macrophage-derived protein (MMS-68) stimulating mucin release from respiratory epithelial cells has previously been described. In this study, the effect of MMS-68 on mucin release from intestinal epithelial cells was determined. Methods: Colonic epithelial cells isolated from normal colon, ulcerative colitis, Crohn's colitis, and cells from three colon cancer cell lines were labeled with [3H]-glucosamine and stimulated with MMS-68. High molecular weight glycoproteins were precipitated and counted. Results: In all of the cells tested, MMS-68 enhanced mucin secretion by 1.46-2.0-fold above control values, comparable to the level achieved with carbachol (10-5 mol/L). Coincubation with anti-MMS-68 monoclonal antibody 1D-10 blocked this bioactivity. Freshly isolated intestinal macrophages reacted with monoclonal antibody 1D-10. Immunofluorescent staining of frozen sections revealed the presence of MMS-68-producing cells (macrophages) in the lamina propria of normal colon and Crohn's colitis, with weaker expression in ulcerative colitis mucosa. Conclusions: Intestinal macrophages produce a novel mucin secretagogue, which is as potent as carbachol for stimulating mucin secretion from colonic epithelial cells. This factor may explain, in part, the alterations in mucin secretion often seen in inflammatory bowel disease.
UR - http://www.scopus.com/inward/record.url?scp=0027226193&partnerID=8YFLogxK
U2 - 10.1016/0016-5085(93)90338-D
DO - 10.1016/0016-5085(93)90338-D
M3 - Article
C2 - 8482444
AN - SCOPUS:0027226193
SN - 0016-5085
VL - 104
SP - 1302
EP - 1309
JO - Gastroenterology
JF - Gastroenterology
IS - 5
ER -