Increase of peripheral B lymphocytes committed to the production of monoreactive and high affinity antibodies to HTLV-1 in patients with HAM/TSP.
J Neuroimmunol
; 37(1-2): 35-45, 1992 Mar.
Article
em En
| MEDLINE
| ID: mdl-1372329
ABSTRACT
We quantitated the frequency of B lymphocytes capable of producing antibodies to HTLV-1 in the peripheral blood from patients with HAM/TSP, non-HAM/TSP HTLV-1 carriers and seronegative healthy subjects. Epstein-Barr virus (EBV) was used as a polyclonal activator of B lymphocytes in a limiting dilution condition. We found that B lymphocytes committed to the production of monoreactive-IgG and -IgA antibodies to recombinant HTLV-1 (gag + env) hybrid protein were significantly increased in a number in patients with HAM/TSP as compared to non-HAM/TSP HTLV-1 carriers and seronegative healthy subjects. By transforming these B lymphocytes with EBV and fusing them with human-mouse heteromyeloma (F3B6), a stable hybridoma producing IgG monoclonal antibody (mAb) to HTLV-1 (gag + env) protein was generated from a patient with HAM/TSP. This mAb (IgG1, kappa), designated F31.1, specifically bound to the amino acid residues from 235 to 254 of HTLV-1 envelope glycoproteins (gp46) with high affinity (Kd = 4.0 x 10(-9) mol/l). These data indicate that the antigen-driven process of B lymphocytes maturation by HTLV-1 antigens is markedly increased in patients with HAM/TSP.
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Base de dados:
MEDLINE
Assunto principal:
Linfócitos B
/
Anticorpos Anti-HTLV-I
/
Paraparesia Espástica Tropical
Limite:
Humans
Idioma:
En
Ano de publicação:
1992
Tipo de documento:
Article