title: Expression of heparan sulfate proteoglycans in murine models of experimental colitis.
abstract: BACKGROUND
  Heparan sulfate proteoglycans (HSPGs) are considered important in maintaining physiological homeostasis in many systems. Their expression is altered greatly in several pathophysiological conditions. Herein, we assess the expression and cellular localization of HSPGs in two murine models of human inflammatory bowel disease (IBD).
  
  
  METHODS
  Expression and localization of HSPGs, syndecans, and HS epitopes were examined in the colon of 129SvEv interleukin 10 knockout (IL10(-/-)), C3Bir IL10(-/-), and their genetic control (IL10(+/+)) counterparts (129SvEv; C3H/HeJ). mRNA expression of syndecans and heparan sulfate biosynthesis enzymes were evaluated by real-time polymerase chain reaction (PCR). Localization of HSPGs was determined by immunofluorescence.
  
  
  RESULTS
  mRNA for all syndecans was detected and expression in colonic tissues altered in IL10(-/-) mice. Syndecan-1 protein was expressed in the intestinal epithelium and on lamina propria cells of IL10(-/-) and control mice but was significantly reduced on the intestinal epithelial cells of IL10(-/-), mice particularly with severe colitis. Syndecan-2 was not detected, whereas syndecan-3 immunoreactivity was localized in the lamina propria but did not differ between control and IL10(-/-) mice. Syndecan-4 was present on epithelial cells of all mice but was significantly reduced in IL10(-/-) mice. Differences in the expression of HS epitopes between control and IL10(-/-) mice were also confirmed.
  
  
  CONCLUSIONS
  The study has revealed altered expression of syndecan-1 and -4 and HS epitopes in the gut of mice with an IBD-like gut disorder. The IL10(-/-) mouse is a useful model for further study of the functional role of HSPGs in chronic inflammation and in maintaining healthy gut barrier.
authors: Gut Immunology Group, Gut Health Division, Rowett Institute of Nutrition and Health, University of Aberdeen, Scotland, UK. a.patterson@abdn.ac.uk
authors: A M
authors: AM
authors: Patterson
authors: M I
authors: MI
authors: Delday
authors: T H
authors: TH
authors: van Kuppevelt
authors: G
authors: G
authors: Loh
authors: M
authors: M
authors: Blaut
authors: D
authors: D
authors: Haller
authors: G
authors: G
authors: Grant
authors: D
authors: D
authors: Kelly
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002478:Cells, Cultured; D003092:Colitis / Q000209:etiology / Q000378:metabolism* / Q000473:pathology; D003106:Colon / Q000378:metabolism / Q000473:pathology; D004195:Disease Models, Animal; D005260:Female; D005455:Fluorescent Antibody Technique; D019812:Heparan Sulfate Proteoglycans / Q000235:genetics / Q000378:metabolism*; D006497:Heparan Sulfate / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007249:Inflammation / Q000209:etiology / Q000378:metabolism / Q000473:pathology; D016753:Interleukin-10 / Q000502:physiology*; D007413:Intestinal Mucosa / Q000378:metabolism / Q000473:pathology; D051379:Mice; D008809:Mice, Inbred C3H; D018345:Mice, Knockout; D012333:RNA, Messenger / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D053668:Syndecan-1 / Q000235:genetics / Q000378:metabolism; D053669:Syndecan-2 / Q000235:genetics / Q000378:metabolism; D053670:Syndecan-3 / Q000235:genetics / Q000378:metabolism; D053671:Syndecan-4 / Q000235:genetics / Q000378:metabolism; D053667:Syndecans / Q000235:genetics / Q000378:metabolism*
chemical_list: D019812:Heparan Sulfate Proteoglycans; D006497:Heparan Sulfate; D016753:Interleukin-10; D012333:RNA, Messenger; D053668:Syndecan-1; D053669:Syndecan-2; D053670:Syndecan-3; D053671:Syndecan-4; D053667:Syndecans