title: [Direct and indirect recognition in pig-to-man xenotransplantation].
abstract: OBJECTIVE
  To investigate the role of direct and indirect recognition in pig-to-man xenotransplantation.
  
  
  METHODS
  Taken the peripheral blood lymphocytes (PBLC) from three Neijiang pigs and two humans as stimulators and respondors, the one-way mixed lymphatic reactions (MLR) of xenograft were carried out, and allo- and self-PBLC as control.
  
  
  RESULTS
  Among the three patterns of MLR, syngeneic was MLR the lowest in proliferation, the allogenic MLR was the highest, and the xenogenic MLR was medium. The PBLCs from humans and pigs were matched on HLA-A, B, DR and DQ by means of modified Terasaki assay. The match on pigs was failure because of the pre-existing natural xenogenic antibody in the testing serum.
  
  
  CONCLUSIONS
  The results suggest that the degree of MHC matching still affect the rejection in xenotransplantation, but the present serum assay of MHC matching is not fit for pig.
authors.affiliation: Department of Orthopedic Surgery, First University Hospital, West China University of Medical Sciences, Chengdu, Sichuan, P. R. China 610041.
authors.forename: T
authors.initials: T
authors.lastname: Li
authors.forename: Y P
authors.initials: YP
authors.lastname: Li
authors.forename: Z M
authors.initials: ZM
authors.lastname: Yang
mesh_terms: D000818:Animals; D006084:Graft Rejection / Q000276:immunology*; D006801:Humans; D007959:Lymphocyte Culture Test, Mixed; D013552:Swine; D014183:Transplantation, Heterologous