PMID- 11930311 OWN - NLM STAT- MEDLINE DCOM- 20020516 LR - 20111117 IS - 0022-1899 (Print) IS - 0022-1899 (Linking) VI - 185 IP - 8 DP - 2002 Apr 15 TI - Comparative analysis of CD8+ T cell responses against human cytomegalovirus proteins pp65 and immediate early 1 shows similarities in precursor frequency, oligoclonality, and phenotype. PG - 1025-34 AB - CD8+ T cells are key effectors of the immune response against human cytomegalovirus (HCMV). A number of HCMV-derived CD8+ T cell epitopes are known. Using epitope prediction and subsequent testing for interferon-gamma responses by the ELISPOT assay, we identified an optimal human leukocyte antigen (HLA)-A*0201-restricted CD8+ T cell epitope derived from the major immediate early 1 (IE-1) gene product. As many as one-third of HLA-A*0201-positive, HCMV-seropositive donors make responses to this peptide (residues 316-324 [VLEETSVML]), which can exceed responses against a published immunodominant pp65 epitope (residues 495-503 [NLVPMVATV]). Major histocompatibility complex peptide tetramer staining facilitated detailed phenotypic analyses and revealed populations that resemble terminally differentiated effector cells (CD57+ and CD28-), with considerable restriction in T cell receptor beta-chain variable region use. The results confirm that, although pp65 is a major target for CD8+ T cells, the IE-1 protein may itself stimulate comparable responses in some persons. FAU - Khan, Naeem AU - Khan N AD - Cancer Research UK Institute for Cancer Studies, University of Birmingham, Vincent Drive, Edgbaston, Birmingham, UK B15 2TA. FAU - Cobbold, Mark AU - Cobbold M FAU - Keenan, Russell AU - Keenan R FAU - Moss, Paul A H AU - Moss PA LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20020325 PL - United States TA - J Infect Dis JT - The Journal of infectious diseases JID - 0413675 RN - 0 (Antigens, Viral) RN - 0 (HLA-A Antigens) RN - 0 (HLA-A*02:01 antigen) RN - 0 (HLA-A2 Antigen) RN - 0 (Immediate-Early Proteins) RN - 0 (Immunodominant Epitopes) RN - 0 (Phosphoproteins) RN - 0 (Viral Matrix Proteins) RN - 0 (cytomegalovirus matrix protein 65kDa) RN - 0 (immediate-early proteins, cytomegalovirus) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Antigens, Viral/*immunology MH - CD8-Positive T-Lymphocytes/*immunology MH - Genes, T-Cell Receptor beta MH - HLA-A Antigens/analysis MH - HLA-A2 Antigen MH - Humans MH - Immediate-Early Proteins/*immunology MH - Immunodominant Epitopes MH - Interferon-gamma/biosynthesis MH - Phenotype MH - Phosphoproteins/*immunology MH - Viral Matrix Proteins/*immunology EDAT- 2002/04/04 10:00 MHDA- 2002/05/17 10:01 CRDT- 2002/04/04 10:00 PHST- 2001/06/11 00:00 [received] PHST- 2001/12/05 00:00 [revised] PHST- 2002/04/04 10:00 [pubmed] PHST- 2002/05/17 10:01 [medline] PHST- 2002/04/04 10:00 [entrez] AID - JID010654 [pii] AID - 10.1086/339963 [doi] PST - ppublish SO - J Infect Dis. 2002 Apr 15;185(8):1025-34. doi: 10.1086/339963. Epub 2002 Mar 25.