PMID- 15711982 OWN - NLM STAT- MEDLINE DCOM- 20051031 LR - 20171116 IS - 0934-0874 (Print) IS - 0934-0874 (Linking) VI - 17 IP - 12 DP - 2005 May TI - The active role played by xenogeneic endothelial cells in the indirect presentation pathway is not lymphocyte trans-co-stimulation. PG - 787-94 AB - The human CD4+ T lymphocyte response to major histocompatibility complex (MHC) class II-negative porcine endothelial cells is dependent on the presence of human monocytes through a human leukocyte antigen (HLA) class II-restricted indirect presentation pathway. Because the role of porcine endothelial cells had been previously shown to do more than simply supply xenopeptides, co-stimulatory signals were analysed. Endothelial cells were shown to express the CD54, CD58, CD59 and CD86 transcripts; however, no membrane B7 molecule could be detected. Blocking experiments in a direct pathway model confirmed that porcine endothelial cells could provide co-stimulatory signals to human T cells through the CD2 and LFA-1 pathways. Nevertheless, the proliferation achieved in the indirect presentation model required co-stimulation by LFA-1, CD2 and CD28, engaged by co-stimulation molecules expressed in the cis-form by the human monocytes. These results clearly show that the active role played by the endothelial cells in the indirect pathway is not lymphocyte trans-co-stimulation and suggest that cis-co-stimulation dominates trans-co-stimulation when both are present. FAU - Brossay, Angelique AU - Brossay A AD - EA 3249 Cellules Hematopoietiques, Hemostase et Greffe and IFR 135 Imagerie et Exploration fonctionelles, Universite Francois Rabelais, Tours, France. FAU - Harang, Solene AU - Harang S FAU - Herault, Olivier AU - Herault O FAU - Bardos, Pierre AU - Bardos P FAU - Watier, Herve AU - Watier H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20050215 PL - Switzerland TA - Transpl Int JT - Transplant international : official journal of the European Society for Organ Transplantation JID - 8908516 RN - 0 (Antigens, CD) RN - 0 (Antigens, Heterophile) RN - 0 (B7-1 Antigen) RN - 0 (B7-2 Antigen) RN - 0 (CD2 Antigens) RN - 0 (CD48 Antigen) RN - 0 (CD58 Antigens) RN - 0 (CD59 Antigens) RN - 0 (CD86 protein, human) RN - 0 (Immunoconjugates) RN - 0 (Membrane Glycoproteins) RN - 0 (RNA, Messenger) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - 7D0YB67S97 (Abatacept) SB - IM MH - Abatacept MH - Animals MH - Antigen Presentation/*immunology MH - Antigens, CD/genetics/immunology MH - Antigens, Heterophile/*immunology MH - Aorta/cytology MH - B7-1 Antigen/genetics/immunology MH - B7-2 Antigen MH - CD2 Antigens/immunology/metabolism MH - CD48 Antigen MH - CD58 Antigens/genetics/immunology MH - CD59 Antigens/genetics/immunology MH - Cells, Cultured MH - Endothelial Cells/cytology/*immunology MH - Humans MH - Immunoconjugates/immunology/metabolism MH - Intercellular Adhesion Molecule-1/genetics/immunology MH - Lymphocytes/cytology/*immunology MH - Membrane Glycoproteins/genetics/immunology MH - RNA, Messenger/analysis MH - Swine MH - Swine, Miniature MH - Transplantation, Heterologous/*immunology EDAT- 2005/02/16 09:00 MHDA- 2005/11/01 09:00 CRDT- 2005/02/16 09:00 PHST- 2003/03/24 00:00 [received] PHST- 2003/09/04 00:00 [accepted] PHST- 2003/08/29 00:00 [revised] PHST- 2005/02/16 09:00 [pubmed] PHST- 2005/11/01 09:00 [medline] PHST- 2005/02/16 09:00 [entrez] AID - 10.1007/s00147-004-0773-9 [doi] PST - ppublish SO - Transpl Int. 2005 May;17(12):787-94. doi: 10.1007/s00147-004-0773-9. Epub 2005 Feb 15.