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  • Title: Antibody-dependent cell-mediated cytotoxicity (ADCC) in HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP).
    Author: Fujihara K, Itoyama Y, Yu F, Kubo C, Goto I.
    Journal: J Neurol Sci; 1996 Oct; 142(1-2):65-9. PubMed ID: 8902722.
    Abstract:
    Defects in immune surveillance mechanisms may allow increased replication of human T-lymphotropic virus type I (HTLV-I) in peripheral blood mononuclear cells in HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP). To explore this possibility, antibody-dependent cell-mediated cytotoxicity (ADCC) against HTLV-I infected cells in HAM/TSP and in asymptomatic HTLV-I-seropositive carriers (SPC), was studied. ADCC activity was significantly depressed in HAM/TSP compared to SPC subjects (p < 0.025) and was due to specific reduction in ADCC effector activity. On the other hand, there was no difference in antibody component of anti-HTLV-I ADCC (ADCC-Ab) activities between HAM/TSP and SPC, although patients with more severe forms of disease tended to have higher anti-HTLV-I ADCC-Ab activity. In HAM/TSP, depressed ADCC activity against HTLV-I due to reduced ADCC-effector activity may allow increased replication of HTLV-I which may implicate the development of inflammatory neuropathologic lesions of HAM/TSP.
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