Abstract:
:We analyzed the relationship between the expression of interferon (IFN)-gamma and HTLV-I p19 antigen and activation of p38 mitogen-activated protein kinase (p38 MAPK) in two HTLV-I-infected T cell lines derived from two patients (HCT-1 and HCT-4) with HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP), and three HTLV-I-infected T cell lines derived from three patients with adult T cell leukemia (ATL). Expression of phosphorylated (activated)-p38 MAPK was markedly increased concomitant with high levels of both IFN-gamma and HTLV-I p19 antigen expression in both HCT-1 and HCT-4 compared with cell lines derived from ATL patients. Treatment with SB203580, a specific inhibitor of p38 MAPK, suppressed IFN-gamma and HTLV-I p19 antigen expression levels in HCT-1, HCT-4 and peripheral blood CD4(+) T cells of HAM/TSP patients. These findings strongly suggest that activation of p38 MAPK signaling pathway is involved in the up-regulation of IFN-gamma expression with high HTLV-I proviral load in HAM/TSP patients.
journal_name
J Neuroimmunoljournal_title
Journal of neuroimmunologyauthors
Fukushima N,Nishiura Y,Nakamura T,Yamada Y,Kohno S,Eguchi Kdoi
10.1016/j.jneuroim.2004.10.007subject
Has Abstractpub_date
2005-02-01 00:00:00pages
196-202issue
1-2eissn
0165-5728issn
1872-8421pii
S0165-5728(04)00370-4journal_volume
159pub_type
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journal_title:Journal of neuroimmunology
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