No abstract available.
Histocompatibility Antigens* ; Histocompatibility*

No abstract available.
Histocompatibility Antigens* ; Histocompatibility* ; Humans ; Young Adult*

No abstract available.
Histocompatibility Testing* ; Spondylitis, Ankylosing*

During 1992-2002, 63 cases of renal transplantation implemented in Vietnam. The donors were live relatives. The results have shown that the regulation of histocompatibility in the selection of renal donor and receiver was closely implemented. The acute rejection related with the histocompatibility of pairs of donor - receiver and use of immunosuppressive agents before, during and after transplantation.
Kidney Transplantation ; Histocompatibility

Minor histocompatibility antigens are MHC-bound peptides and contribute to the generation of allo-responses after allogeneic transplantation. H60 is a dominant minor H antigen that induces a strong CD8 T-cell response in MHC-matched allogeneic transplantation settings. Here, we report establishment of a TCR transgenic mouse line named J15, wherein T cells express TCRs specific for H60 in complex with H-2K(b), and different fates of the thymocytes expressing J15 TCRs in various thymic antigenic environments. Thymocytes expressing the J15 TCRs were positively selected and differentiated into CD8+ single positive (SP) cells in the thymus of C57BL/6 mice, wherein the cognate antigen H60 is not expressed. However, thymocytes were negatively selected in thymus tissue where H60 was transgenically expressed under the control of the actin promoter, with double-positive stages of cells being deleted. Despite the ability of the H60H peptide (LTFHYRNL) variant to induce cytotoxic activity from H60-specific CTL lines at ~50% of the activity induced by normal H60 peptides (LTFNYRNL), J15-expressing thymocytes were positively selected in the thymus where the variant H60H was transgenically expressed. These results demonstrate that a single amino-acid change in the H60 epitope peptide influences the fate of thymocytes expressing the cognate TCR.
Actins ; Animals ; Histocompatibility Antigens* ; Histocompatibility* ; Mice ; Mice, Transgenic ; Minor Histocompatibility Antigens ; Peptides ; T-Lymphocytes ; Thymocytes* ; Thymus Gland ; Transplantation, Homologous

BACKGROUND: Disparities of Minor H antigens can induce graft rejection after MHC-matched transplantation. H60 has been characterized as a dominant antigen expressed on hematopoietic cells and considered to be an ideal model antigen for study on graft-versus-leukemia effect. METHODS: Splenocytes from C57BL/6 mice immunized with H60 congenic splenocytes were used for establishment of H60-specific CTL clones. Then the clones were characterized for proliferation capacity and cytotoxicity after stimulation with H60. Clone #14, #15, and #23 were tested for the TCR binding avidity to H60-peptide/H-2Kb and analyzed for TCR sequences. RESULTS: H60-specific CTL clones showed different levels of proliferation capacity and cytotoxic activity to H60-stimulation. Clones #14, #15, and #23 showed high proliferation activity, high cytotoxicity, and low activities on both aspects, respectively, and have TCRs with different binding avidities to H60-peptide/H-2Kb with t 1/2 values of 4.87, 6.92, and 13.03 minutes, respectively. The TCR usages were Valpha12D-3-01+Jalpha11-01 and Vbeta12-1-01+Dbeta1-01+J2-7-01 for clone #14, Valpha13D-1-02+Jalpha34-02 and Vbeta13-1-02+Dbeta2-01+Jbeta2-7-01 for clone #15, and Valpha16D+Jalpha45-01 and Vbeta12-1-01+Dbeta1-01+Jbeta2-5-01 for clone #23. CONCLUSION: The results will be useful for modeling GVL and generation TCR transgenic mouse.
Animals ; Clone Cells ; Graft Rejection ; Histocompatibility ; Histocompatibility Antigens ; Mice ; Mice, Transgenic ; Transplants

OBJECTIVETo study the histocompatibility of three bio-derived bones.

METHODSAfter treatment with different physical and chemical method, three bio-derived bones, the composite fully deproteinized bone (CFDB), partially deproteinized bone (PDPB) and partially decalcified bone (PDCB) were implanted into rabbits. The toxicity, immune response and subperiosteum osteogenesis of CFDB, PDPB and PDCB were studied through gross observation, serum antibody measurement, evaluation of local cellular immune response and HE staining.

RESULTSThe study showed that CFDB, PDPB and PDCB had no toxicity. They could conduct peripheral tissue to grow into them and had no harmful effect on subperiosteum osteogenesis. They could also promote cartilage and osteoid tissue derived from periosteum to calcify to new bone, and combine with the peripheral bone. The degree of immune response caused by them was in the sequence of PDCB > PDPB > CFDB.

CONCLUSIONSThe three bio-derived bones, CFDB, PDPB and PDCB have good histocompatibility.

Animals ; Antibodies ; blood ; Bone Transplantation ; Bone and Bones ; immunology ; Female ; Histocompatibility ; Histocompatibility Testing ; Male ; Rabbits ; Tissue Engineering

Here, we report the results of the first histocompatibility proficiency testing (PT) performed by the Korean Association of External Quality Assessment Service in 2018. The directly prepared PT specimens of whole blood, sera, and mononuclear cell suspensions were distributed to participants biannually. The number of participants was comparable to that in the previous external PT program, and the response rate was 88%–100%. The accuracy rates for human leukocyte antigen (HLA) A, B, C, DR, and DQ low and high resolution typing were 100%/100%, 100%/98%, 100%/99%, and 99%/98%, respectively; HLA-B27 typing, 99.1%; T cell and B cell crossmatching, 3.1% and 6.0%, respectively; and HLA antibody screening and identification, 100% and 100%, respectively. The results of HLA crossmatching were not reported from four participants due to poor cell viability. Further improvements of the specimen delivery process, grading criteria for crossmatching, and format of participant summary are warranted.
Cell Survival ; Histocompatibility Testing ; Histocompatibility ; HLA-B27 Antigen ; Humans ; Leukocytes ; Mass Screening ; Suspensions

Detection of significant alloimmune response, which affects graft function and survival by effective immune monitoring, is critical for treatment decision making. However, there is no consensus regarding immune monitoring (IM) for kidney transplantation (flow KT) in Korea. The IM protocol may be affected by the level of immunological risk, the methods of desensitization and the availabilities of resources such as laboratory support and cost of tests. Questionnaire surveys designed to identify the current practices regarding immune monitoring of KT among transplant clinicians and clinical pathologists in Korea and eventually provide a basis for the establishment of harmonized immune monitoring guidelines in KT were administered as part of a Korean Society for Transplantation Sponsored Research Project. The survey results revealed significant variations in IM protocols and interpretation of tests affecting treatment decisions between institutes. Moreover, the results revealed a need to expand the histocompatibility tests into high resolution HLA typing in multiple loci and non-HLA antibody tests that facilitate the epitope analysis and eventually virtual crossmatching. The results of the questionnaire survey from clinical pathologists are addressing the urgent need for the standardization of interpretation and harmonization of results reporting in single antigen bead based HLA antibody identification. Finally, communication between clinicians and clinical pathologists to meet the clinical expectations regarding various immune monitoring tests is needed.
Academies and Institutes ; Consensus ; Decision Making ; Histocompatibility ; Histocompatibility Testing ; Kidney Transplantation ; Korea* ; Monitoring, Immunologic* ; Transplants

Fresh rat corneas as well as corneas preserved in several different corneal preservation media were stained with Avidin-Biotin-peroxidase Complex method in order to evaluate major histocompatibility complex (MHC) antigen expression. In fresh corneas, class I antigen was identified in corneal epithelium, stroma and endothelium. Class II antigen was identified only in stroma. In corneas preserved in the media which contained chondroitin and dextran for 7 days, class I antigen was somewhat decreased but class II antigen was increased. In corneas preserved in the medium which contained insulin or epidermal growth factor for 7 days, class II antigens seemed to be increased compaired to the fresh cornea. Expression of MHC antigens of corneas in the medium with fetal bovine serum were similar to those of fresh corneas.
Animals ; Cornea/*metabolism ; Culture Media ; Histocompatibility Antigens Class I/*biosynthesis ; Histocompatibility Antigens Class II/*biosynthesis ; Immunoenzyme Techniques ; Major Histocompatibility Complex ; Organ Preservation/methods ; Rats ; Rats, Inbred Lew