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- Title
Ex Vivo Analysis of Human T Lymphotropic Virus Type 1-Specific CD4<sup>+</sup> Cells by Use of a Major Histocompatibility Complex Class II Tetramer Composed of a Neurological Disease-Susceptibility Allele and Its Immunodominant Peptide.
- Authors
Nose, Hirohisa; Kubota, Ryuji; Seth, Nilufer P.; Goon, Peter K.; Yuetsu Tanaka; Shuji Izumo; Koichiro Usuku; Yoshiro Ohara; Wucherpfennig, Kai W.; Bangham, Charles R. M.; Mitsuhiro Osame; Mineki Saito
- Abstract
HLA-DRB1*0101 is associated with susceptibility to human T lymphotropic virus type 1 (HTLV-1)-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Here, we used a synthetic tetramer of DRB1*0101 and its epitope peptide to analyze HTLV-1-specific CD4 T cells ex vivo. The frequency of tetramer+CD4+ T cells was significantly greater in patients with HAM/TSP than in healthy HTLV-1 carriers (HCs) at a given proviral load and correlated with HTLV-1 tax messenger RNA expression in HCs but not in patients with HAM/TSP. These cells displayed an early to intermediate effector memory phenotype and were preferentially infected by HTLV-1. T cell receptor gene analyses of 2 unrelated DRB1*0101-positive patients with HAM/TSP showed similar Vβ repertoires and amino acid motifs in complementarity-determining region 3. Our data suggest that efficient clonal expansion of virus-specific CD4+ T cells in patients with HAM/TSP does not simply reflect higher viral burden but rather reflects a rapid turnover caused by preferential infection and/or in vivo stimulation by major histocompatibility complex-peptide complexes.
- Subjects
LYMPHOCYTES; MAJOR histocompatibility complex; MESSENGER RNA; T cell receptors; CELL membranes; CELL receptors; HLA histocompatibility antigens; HISTOCOMPATIBILITY antigens; AMINO acids
- Publication
Journal of Infectious Diseases, 2007, Vol 196, Issue 12, p1761
- ISSN
0022-1899
- Publication type
Article
- DOI
10.1086/522966