PMID- 12559623 OWN - NLM STAT- MEDLINE DCOM- 20030926 LR - 20190906 IS - 0198-8859 (Print) IS - 0198-8859 (Linking) VI - 64 IP - 2 DP - 2003 Feb TI - Derivation of HLA-B*0702 transgenic mice: functional CTL repertoire and recognition of human B*0702-restricted CTL epitopes. PG - 211-23 AB - Transgenic mice expressing chimeric human leukocyte antigen (HLA)-B*0702 and murine H-2K(b) class I molecules were evaluated as a model system to study the immunogenicity of human cytotoxic T lymphocyte epitopes. Immunization of these mice with six known HLA-B*0702-restricted cytotoxic T lymphocyte epitopes emulsified in incomplete Freund's adjuvant induced significant immune responses specific for all six epitopes. A comparison of the immune responses between HLA-B*0702/K(b) and HLA-A*0201/K(b) transgenic mice demonstrated that the HLA-B*0702/K(b) mice possess a T-cell receptor repertoire capable of recognizing human B*0702 epitopes. However, the magnitude of B*0702-specific responses induced in B*0702/K(b) mice were approximately tenfold lower than A*0201-specific responses induced in HLA-A*0201/K(b) transgenic mice. A panel of 24 B*0702 motif-bearing peptides was used to examine the relationship between immunogenicity and HLA-B*0702 binding capacity. All seven peptides with high binding affinities of 50% inhibitory concentration < or =50 NM (IC(50) 50 nM or less) were immunogenic. Similarly, 75% (9 of 12) of the intermediate binders (IC(50) nM of 50-500) were also immunogenic. Finally, only two of five peptides with binding capacity > 500 nM were found to have marginal immunogenicity, whereas the other three were completely negative. HLA-B*0702/K(b) transgenic mice were found to induce B*0702-specific responses after immunization with whole DNA genes or minigenes, suggesting that, at least to some degree, B*0702 epitopes were generated as a result of natural in vivo processing and presentation. FAU - Alexander, Jeff AU - Alexander J AD - Epimmune Inc., San Diego, California 92121, USA. jalexander@epimmune.com FAU - Oseroff, Carla AU - Oseroff C FAU - Sidney, John AU - Sidney J FAU - Sette, Alessandro AU - Sette A LA - eng GR - N01-A1-95362/PHS HHS/United States GR - N01-AI-45241/AI/NIAID NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Hum Immunol JT - Human immunology JID - 8010936 RN - 0 (Epitopes, T-Lymphocyte) RN - 0 (H-2 Antigens) RN - 0 (H-2Kb protein, mouse) RN - 0 (HLA-A Antigens) RN - 0 (HLA-A*02:01 antigen) RN - 0 (HLA-A2 Antigen) RN - 0 (HLA-B Antigens) RN - 0 (HLA-B*07:02 antigen) RN - 0 (HLA-B7 Antigen) RN - 0 (Immunodominant Epitopes) RN - 0 (Peptide Fragments) RN - 0 (Recombinant Fusion Proteins) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Amino Acid Sequence MH - Animals MH - Antigen Presentation MH - Cell Line MH - Cytotoxicity, Immunologic MH - Epitopes, T-Lymphocyte/*immunology MH - Genes, MHC Class I MH - Genes, Synthetic MH - H-2 Antigens/genetics/immunology MH - HLA-A Antigens/genetics/immunology MH - HLA-A2 Antigen MH - HLA-B Antigens/*genetics/immunology MH - HLA-B7 Antigen MH - Humans MH - Immunization MH - Immunodominant Epitopes/immunology MH - Interferon-gamma/metabolism MH - Jurkat Cells MH - Lymphocyte Activation MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Molecular Sequence Data MH - Peptide Fragments/immunology MH - Recombinant Fusion Proteins/genetics/immunology MH - T-Lymphocytes, Cytotoxic/*immunology EDAT- 2003/02/01 04:00 MHDA- 2003/09/27 05:00 CRDT- 2003/02/01 04:00 PHST- 2003/02/01 04:00 [pubmed] PHST- 2003/09/27 05:00 [medline] PHST- 2003/02/01 04:00 [entrez] AID - S0198885902007863 [pii] AID - 10.1016/s0198-8859(02)00786-3 [doi] PST - ppublish SO - Hum Immunol. 2003 Feb;64(2):211-23. doi: 10.1016/s0198-8859(02)00786-3.