Concentrações plasmáticas de citocinas e quimiocinas na infecção pelo HTLV-1 / Plasma concentrations of cytokines and chemokines in HTLV-1

INTRODUÇÃO: O vírus linfotrópico das células T humano tipo 1 (HTLV-1) é endêmico na Bahia e está associado com doenças graves, como a Paraparesia Espástica Tropical/Mielopatia associada ao HTLV-1 (HAM/TSP) e a Dermatite Infecciosa associada ao HTLV-1 (DIH). Escassos trabalhos tem sido reportados com a avaliação de citocinas e quimiocinas em indivíduos jovens infectados pelo HTLV-1 e não existem dados sobre a manifestação simultânea DIH e HAM/TSP na faixa infanto-juvenil. OBJETIVO: Avaliar as concentrações plasmáticas de citocinas e quimiocinas na infecção pelo HTLV-1 em indivíduos infanto-juvenis. MÉTODO: Foram incluídos 61 indivíduos portadores do HTLV-1 distribuídos nos grupos Portadores assintomáticos, pacientes com a DIH, pacientes com DIH/HAM/TSP, pacientes com a HAM/TSP e 20 indivíduos saudáveis sem a infecção pelo HTLV-1, todos na faixa infanto-juvenil. As concentrações plasmáticas foram comparadas através do método de Elisa e de Cytometric Bead Array (CBA)...

INTRODUCTION: The lymphotropic virus of cells T human type 1 (HTLV ) is endemic in Bahia and it is associated with serious diseases such as Tropical Spastic Paraparesis/associated myelopathy with HTLV-1 and Infectious Dermatitis associated with HTLV -1 (IDH). Very little work has been reported with the evaluation of cytokines and chemokines in the IDH and there has been no data on the manifestation simultaneous IDH and HAM/TSP in children and youth range. OBJECTIVE: To evaluate the plasma concentrations of cytokines and chemokines in HTLV-1 infection in children and young individuals. METHOD: We included 61 individuals HTLV-1 spread in groups Asymptomatic Carriers, patients with IDH, patients with IDH/HAM/TSP, patients with HAM/TSP and 20 healthy individuals without HTLV-1, all in children's range. Plasma concentrations were compared using the ELISA method and Cytometric Bead Array (CBA)...

Functional and phenotypic analysis of T cells cloned from the skin of patients with Behcet's disease

Activated T lymphocytes often accumulate in the dermis of patients with active Behcet's disease [BD] and may play a role in the development of skin lesions. We propagated and cloned these cells directly from skin biopsies in two active BD. The cloning frequency estimates were f = 0.20 T cells delived from the skin of BD versus f = 0.68 for autologous blood T lymphocytes. All of the 12 skin-derived BD clones were CD4+. Clonal analyses performed with CD4+ clones from BD patients showed that all skin-derived clones synthesized interferon-gamma [IFN-gamma: 80%], glycosarninoglycan- stimulatorty factor [GAG: 11%], when induced in vitro by concanavalin-A [ConA]. Skinderived clones produced tumor necrosis factor-alpha [TNF-a] at 60% level. Our results demonstrate that T lymphocytes obtained from the skin of patients with BD synthesized cytokines which could modulate functions the BD skin immune system

Principios básicos de la respuesta inmunológica / Basic principles of immunologyc response

La protección del ataque de microorganismos invasores incluye mecanismos de resistencia específicos y no específicos. Los primeros son los responsables de impedir la mayoría de las infecciones, mientras que los segundos participan una vez que los microorganismos o sus productos han entrado a los tejidos. Los mecanismos de resistencia específicos, también conocidos como respuesta inmunológica, incluyen la participación de células y moléculas con capacidad de reconocer y reaccionar específicamente en contra del microorganismo invasor. En la activación de estos mecanismos participan linfocitos y células accesorias que se comunican a través de una compleja red de señales que incluyen moléculas asociadas a la membrana y moléculas solubles. Del tipo de interacciones establecidas de producirá una respuesta mediada por anticuerpos o por células inmunes, en algunos casos estas interacciones también generan una falta de respuesta (anergia) específica