HTLV1 proviral load in peripheral blood mononuclear cells quantified in 100 HAM/TSP patients: A marker of disease progression

ArticleinJournal of the Neurological Sciences 237(1):53-59 · October 2005with16 Reads
Impact Factor: 2.47 · DOI: 10.1016/j.jns.2005.05.010


    A high proviral load of human T cell lymphotropic virus type 1 (HTLV-1) in peripheral blood mononuclear cells (PBMCs) has been reported in patients with HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The aim of the present study was to investigate the role of HTLV-1 proviral load in PBMCs (expressed as the number of copies per 106 PBMCs) in HAM/TSP disease course. One hundred consecutive HAM/TSP patients were recruited and assigned on the basis of the disability score and disease duration to either a rapid (n=38) or a slow (n=62) progression group. Thirty-four asymptomatic HTLV-1 carriers were also included. HTLV-1 proviral load was quantified in all HAM/TSP patients and asymptomatic subjects. The mean HTLV-1 proviral load was 6-fold lower in asymptomatic carriers than in HAM/TSP patients (18,224±24,811 vs. 107,905±96,651, p