title: T cell-associated CD18 but not CD62L, ICAM-1, or PSGL-1 is required for the induction of chronic colitis.
abstract: The induction and perpetuation of chronic colitis are thought to involve a complex set of adhesive interactions between T cells and endothelial cells located on the vasculature within secondary lymphoid tissue and the intestine. The objective of this study was to assess the roles of T cell-associated CD18, CD62L (L-selectin), ICAM-1, and P-selectin glycoprotein ligand-1 (PSGL-1) in the induction of chronic colitis in mice. CD4(+)CD25(-) T cells derived from either wild-type (WT), CD18-deficient [CD18 knockout (KO)], CD62L KO, ICAM-1 KO, or PSGL-1 KO mice were adoptively transferred into recombinase activating gene-1 (RAG-1)-deficient mice (RAG KO mice) to assess the potential of these T cells to induce chronic colitis. At 8-10 wk following T cell transfer, we observed moderate to severe colitis as assessed by increases in colon weight-to-length ratios and by blinded histopathological analysis. In contrast, we found that transfer of CD18 KO T cells into RAG KO recipients resulted in the significant attenuation of colonic inflammation in these mice. Furthermore, we observed fewer infiltrating CD4(+) T cells in the colonic lamina propria in the CD18 KO-->RAG KO group compared with the WT-->RAG KO group. Finally, message levels of colonic TNF-alpha, IL-1beta, and IFN-gamma were significantly reduced in CD18 KO-->RAG KO mice compared with colitic control animals. We conclude that T cell-associated CD18, but not CD62L, ICAM-1, or PSGL-1, is required for the development of chronic colitis.
authors.affiliation: Dept. of Molecular and Cellular Physiology, Louisana State Univ. Health Sciences Center, 1501 Kings Highway, PO Box 33932, Shreveport, LA 71130-3932, USA.
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Ostanin
authors.forename: Kathryn L
authors.initials: KL
authors.lastname: Furr
authors.forename: Kevin P
authors.initials: KP
authors.lastname: Pavlick
authors.forename: Laura
authors.initials: L
authors.lastname: Gray
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Kevil
authors.forename: Deepti
authors.initials: D
authors.lastname: Shukla
authors.forename: Dwain
authors.initials: D
authors.lastname: D'Souza
authors.forename: Jason M
authors.initials: JM
authors.lastname: Hoffman
authors.forename: Matthew B
authors.initials: MB
authors.lastname: Grisham
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D018821:CD18 Antigens / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism / Q000637:transplantation; D049109:Cell Proliferation; D002478:Cells, Cultured; D002908:Chronic Disease; D003092:Colitis / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D003106:Colon / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D004195:Disease Models, Animal; D018398:Homeodomain Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D007371:Interferon-gamma / Q000235:genetics / Q000378:metabolism; D053583:Interleukin-1beta / Q000235:genetics / Q000378:metabolism; D053645:Interleukin-2 Receptor alpha Subunit / Q000032:analysis; D019041:L-Selectin / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D008213:Lymphocyte Activation; D008562:Membrane Glycoproteins / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D010446:Peptide Fragments / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D012720:Severity of Illness Index; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000378:metabolism
chemical_list: D018821:CD18 Antigens; D018398:Homeodomain Proteins; D053583:Interleukin-1beta; D053645:Interleukin-2 Receptor alpha Subunit; D008562:Membrane Glycoproteins; C084882:P-selectin ligand protein; D010446:Peptide Fragments; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; C052994:interleukin-1beta (163-171); D018799:Intercellular Adhesion Molecule-1; D019041:L-Selectin; C064658:RAG-1 protein; D007371:Interferon-gamma