title: Phenotypic definition of primed T cells in human renal allografts. Use of the CD45R marker.
abstract: Immunohistological studies indicate that T cells and macrophages are the major components of human kidney allograft infiltrates. Recent work has demonstrated a division of T lymphocytes into 2 subpopulations with distinct functions on the basis of their expression of the CD45R antigen (CD45R+ "naive" and CD45R- "memory" T cells). This study analyzes CD45R expression on circulating T cells and T cells infiltrating renal allografts in patients undergoing rejection and/or cyclosporine nephrotoxicity. The percentage of circulating T cells that expressed CD45R in patients with rejecting (63 +/- 4) or stable grafts (66 +/- 3) was not different from values obtained for normal donors (62 +/- 3). In contrast, the percentage of T cells expressing CD45R infiltrating rejecting grafts was 21 +/- 2 and was not affected by the stage of rejection; in patients with CsA toxicity the value was 22 +/- 6. The reduced proportion of T cells that expressed CD45R in the allograft may reflect a change in status from the naive state due to alloantigenic stimulation (which can be demonstrated in vitro) and/or a propensity of memory T cells to enter or be retained in an allograft.
authors: Department of Nephrology, Prince Henry's Hospital, Melbourne, Victoria, Australia.
authors: A N
authors: AN
authors: Stein-Oakley
authors: P G
authors: PG
authors: Kerr
authors: N E
authors: NE
authors: Kraft
authors: R C
authors: RC
authors: Atkins
authors: N M
authors: NM
authors: Thomson
mesh_terms: D015703:Antigens, CD / Q000032:analysis*; D018951:Antigens, CD20; D000943:Antigens, Differentiation; D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D006084:Graft Rejection; D006801:Humans; D016030:Kidney Transplantation / Q000276:immunology*; D017493:Leukocyte Common Antigens; D008213:Lymphocyte Activation; D011948:Receptors, Antigen, T-Cell / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D015703:Antigens, CD; D018951:Antigens, CD20; D000943:Antigens, Differentiation; D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D011948:Receptors, Antigen, T-Cell; D017493:Leukocyte Common Antigens