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Role of resident CNS cell populations in HTLV-1-associated neuroinflammatory disease Lepoutre V; Jain P; Quann K; Wigdahl B; Khan ZKFront Biosci (Landmark Ed) 2009[Jan]; 14 (3): 1152-68Human T cell leukemia virus type 1 (HTLV-1), the first human retrovirus discovered, is the etiologic agent for a number of disorders; the two most common pathologies include adult T cell leukemia (ATL) and a progressive demyelinating neuroinflammatory disease, HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The neurologic dysfunction associated with HAM/TSP is a result of viral intrusion into the central nervous system (CNS) and the generation of a hyperstimulated host response within the peripheral and central nervous system that includes expanded populations of CD4+ and CD8+ T cells and proinflammatory cytokines/chemokines in the cerebrospinal fluid (CSF). This robust, yet detrimental immune response likely contributes to the death of myelin producing oligodendrocytes and degeneration of neuronal axons. The mechanisms of neurological degeneration in HAM/TSP have yet to be fully delineated in vivo and may involve the immunogenic properties of the HTLV-1 transactivator protein Tax. This comprehensive review characterizes the available knowledge to date concerning the effects of HTLV-1 on CNS resident cell populations with emphasis on both viral and host factors contributing to the genesis of HAM/TSP.|Central Nervous System/*pathology[MESH]|HTLV-I Infections/*pathology[MESH]|Human T-lymphotropic virus 1/isolation & purification[MESH]|Humans[MESH]|Muscular Diseases/*pathology[MESH]|Paraparesis, Tropical Spastic/*pathology[MESH] |
