title: Th1 cells that adoptively transfer experimental hypersensitivity pneumonitis are activated memory cells.
abstract: Cultured murine CD4+ T cell lines from Saccharopolyspora rectivirgula-sensitized donors with cytokine secretion characteristics of Th1 cells can adoptively transfer murine experimental hypersensitivity pneumonitis (EHP), whereas Th2 CD4+ cell lines cannot (Cell Immunol 177:169-175, 1997). To assess the differences between these cell lines that may be related to the ability to transfer EHP, we determined cell surface markers that distinguish naive from activated/memory cells that indicate activation and that mediate endothelial adhesion. Both Th1 and Th2 T cell lines are CD4+, CD11a+, ICAM-1+, and L-selectin negative. Th1 cells are CD49d (alpha 4) and LPAM (alpha 4 beta 7) positive, with 32% and 42% of the apparent membrane site density quantitated as the mean molecules of equivalent soluble fluorochromes (MESF) values of unstimulated spleen cells, respectively. Th2 cells are weakly alpha 4 and alpha 4 beta 7 positive, with 15% and 11% of the MESF of unstimulated spleen cells. Th1 cell lines are CD45Rb negative and CD44+, whereas Th2 cell lines are CD45Rb intermediate and CD44-/low. Th1 cells are CD25 (IL-2 receptor) low and Th2 cells CD25 high. We conclude that Th1 cells capable of transfer are activated/memory T cells, and Th2 cells incapable of transfer lack some characteristics of memory/activated T cells (i.e., increase of CD44 and decrease of CD45Rb). Both Th1 and Th2 cell lines express alpha 4 beta 7 and alpha 4 (Th1 > Th2), suggesting that alpha(4) integrin may be important in conferring ability to cells to adoptively transfer EHP.
authors.affiliation: Department of Medicine, Albuquerque VA Medical Center, University of New Mexico School of Medicine, Lovelace Respiratory Research Institutes, Albuquerque, New Mexico 87108, USA.
authors.forename: M
authors.initials: M
authors.lastname: Schuyler
authors.forename: K
authors.initials: K
authors.lastname: Gott
authors.forename: B
authors.initials: B
authors.lastname: Edwards
mesh_terms: D019264:Adoptive Transfer / Q000379:methods; D000542:Alveolitis, Extrinsic Allergic / Q000276:immunology*; D000704:Analysis of Variance; D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D007114:Immunization / Q000379:methods; D007156:Immunologic Memory / Q000276:immunology*; D008213:Lymphocyte Activation / Q000276:immunology*; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D016930:Saccharopolyspora / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology*; D018418:Th2 Cells / Q000276:immunology; D013997:Time Factors