Autoantibodies to colonic cells and subcellular fractions in inflammatory bowel disease: Do they exist?

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Abstract

Previous observations have purported to demonstrate circulating antibodies which bind to colon epithelial cells. However, the significance and reproducibility of such observations has been difficult and the data often phenomenological. To further our understanding of such autoreactivity, we studied sera and purified serum immunoglobulins from patients with ulcerative colitis, Crohn's colitis and other inflammatory diseases, as well as normal volunteers using as a target, well-defined epithelial cell preparations from normal and diseased colon and small bowel including crude suspensions of homogenized cells, purified and characterized brush border membranes, basolateral membranes and a DEAE cellulose column purified protein fraction. Homogenates of normal liver, lung, kidney, thymus, pancreas, stomach and small and large intestine, obtained at surgery, were also included. The purified preparations were characterized by enzyme activity and were electrophoresed on SDS-polyacrylamide gels for immunoblotting. Additional studies were carried out comparing these findings with those of a previously published and described 'positive' colon target preparation and polyclonal antibody. There was no convincing demonstration of circulating autoantibodies in patients with ulcerative colitis. Our data, using well-defined and characterized tissue preparations, raises doubts regarding the presumptive demonstration of autoantibodies in ulcerative colitis.

Original languageEnglish (US)
Pages (from-to)307-320
Number of pages14
JournalJournal of Autoimmunity
Volume3
Issue number3
DOIs
StatePublished - 1990

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Subcellular Fractions
Ulcerative Colitis
Inflammatory Bowel Diseases
Autoantibodies
Colon
Epithelial Cells
DEAE-Cellulose
Membranes
Antibodies
Large Intestine
Colitis
Microvilli
Serum
Immunoblotting
Thymus Gland
Small Intestine
Immunoglobulins
Pancreas
Stomach
Suspensions

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

Cite this

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title = "Autoantibodies to colonic cells and subcellular fractions in inflammatory bowel disease: Do they exist?",
abstract = "Previous observations have purported to demonstrate circulating antibodies which bind to colon epithelial cells. However, the significance and reproducibility of such observations has been difficult and the data often phenomenological. To further our understanding of such autoreactivity, we studied sera and purified serum immunoglobulins from patients with ulcerative colitis, Crohn's colitis and other inflammatory diseases, as well as normal volunteers using as a target, well-defined epithelial cell preparations from normal and diseased colon and small bowel including crude suspensions of homogenized cells, purified and characterized brush border membranes, basolateral membranes and a DEAE cellulose column purified protein fraction. Homogenates of normal liver, lung, kidney, thymus, pancreas, stomach and small and large intestine, obtained at surgery, were also included. The purified preparations were characterized by enzyme activity and were electrophoresed on SDS-polyacrylamide gels for immunoblotting. Additional studies were carried out comparing these findings with those of a previously published and described 'positive' colon target preparation and polyclonal antibody. There was no convincing demonstration of circulating autoantibodies in patients with ulcerative colitis. Our data, using well-defined and characterized tissue preparations, raises doubts regarding the presumptive demonstration of autoantibodies in ulcerative colitis.",
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N2 - Previous observations have purported to demonstrate circulating antibodies which bind to colon epithelial cells. However, the significance and reproducibility of such observations has been difficult and the data often phenomenological. To further our understanding of such autoreactivity, we studied sera and purified serum immunoglobulins from patients with ulcerative colitis, Crohn's colitis and other inflammatory diseases, as well as normal volunteers using as a target, well-defined epithelial cell preparations from normal and diseased colon and small bowel including crude suspensions of homogenized cells, purified and characterized brush border membranes, basolateral membranes and a DEAE cellulose column purified protein fraction. Homogenates of normal liver, lung, kidney, thymus, pancreas, stomach and small and large intestine, obtained at surgery, were also included. The purified preparations were characterized by enzyme activity and were electrophoresed on SDS-polyacrylamide gels for immunoblotting. Additional studies were carried out comparing these findings with those of a previously published and described 'positive' colon target preparation and polyclonal antibody. There was no convincing demonstration of circulating autoantibodies in patients with ulcerative colitis. Our data, using well-defined and characterized tissue preparations, raises doubts regarding the presumptive demonstration of autoantibodies in ulcerative colitis.

AB - Previous observations have purported to demonstrate circulating antibodies which bind to colon epithelial cells. However, the significance and reproducibility of such observations has been difficult and the data often phenomenological. To further our understanding of such autoreactivity, we studied sera and purified serum immunoglobulins from patients with ulcerative colitis, Crohn's colitis and other inflammatory diseases, as well as normal volunteers using as a target, well-defined epithelial cell preparations from normal and diseased colon and small bowel including crude suspensions of homogenized cells, purified and characterized brush border membranes, basolateral membranes and a DEAE cellulose column purified protein fraction. Homogenates of normal liver, lung, kidney, thymus, pancreas, stomach and small and large intestine, obtained at surgery, were also included. The purified preparations were characterized by enzyme activity and were electrophoresed on SDS-polyacrylamide gels for immunoblotting. Additional studies were carried out comparing these findings with those of a previously published and described 'positive' colon target preparation and polyclonal antibody. There was no convincing demonstration of circulating autoantibodies in patients with ulcerative colitis. Our data, using well-defined and characterized tissue preparations, raises doubts regarding the presumptive demonstration of autoantibodies in ulcerative colitis.

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