Navegando por Palavras-chave "CITOCINAS"

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    Citocinas e anestesia
    (Sociedade Brasileira de Anestesiologia, 2002-02-01) Garcia, João Batista Santos [UNIFESP]; Issy, Adriana Machado [UNIFESP]; Sakata, Rioko Kimiko [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade do Maranhão
    BACKGROUND AND OBJECTIVES: Cytokines can be stimulated and released by surgical injury, trauma, infection, inflammation and cancer. High cytokine circulating levels may lead to complications and delay of postoperative recovery. This study review and summarizes available information on cytokines. CONTENTS: Cytokines are polypeptide molecules produced by a wide variety of cells, which seem not to play a role in homeostasis under normal conditions. These mediators are responsible for local or systemic responses and produce immune, metabolic, hemodynamic, endocrine and neural changes. They may activate beneficial biologic responses, such as antimicrobial function stimulation, wound healing, myelostimulation and substrate mobilization. However, abundant cytokine secretion is associated to deleterious effects, such as hypotension, organ failure and death. CONCLUSIONS: In closing this review, it is clear that cytokines have a fundamental role as metabolic, hormonal, immune and hematological response mediators; that there is a therapeutic potential for their expression block; and that anesthesia may interfere in their activation. However, several questions are still to be answered and further studies are needed to explain cytokine actions not only for experimental, but also for clinical purposes.
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    Citocinas pró-inflamatórias em pacientes com dor neuropática submetidos a tratamento com Tramadol
    (Sociedade Brasileira de Anestesiologia, 2009-06-01) Kraychete, Durval Campos; Sakata, Rioko Kimiko [UNIFESP]; Issy, Adriana Machado [UNIFESP]; Bacellar, Olívia; Jesus, Rogério Santos; Carvalho, Edgar M; UFBA Anestesiologia; Universidade Federal de São Paulo (UNIFESP); UFBA Laboratório de Imunologia; UFBA
    BACKGROUND AND METHODS: Proinflammatory cytokines play an important role in the pathophysiology of neuropathic pain syndromes. The objective of this study was to evaluate plasma levels of proinflammatory cytokines before and after treatment with tramadol in patients with herniated intervertebral disks and carpal tunnel syndrome, and to compare them with normal individuals. METHODS: Thirty-eight patients with neuropathic pain secondary to herniated intervertebral disks or carpal tunnel syndrome participated in this study. All patients were treated with controlled release tramadol (100 mg every 12 hours) for 10 days. Venous blood (5 mL) was collected in the morning, before treatment and on the 11th day, and stored (-70° C) until analysis. ELISA was used to determine the plasma levels of cytokines (TNF-±, IL-1, IL-6) and receptors sTNF-R1 (R & D Systems). Plasma levels of cytokines of 10 healthy volunteers were also determined. RESULTS: The concentration of TNF-± before (5.8 ± 2.8 pg.mL-¹) was significantly higher than after treatment with tramadol (4.8 ± 2.1 pg.mL-1; p = 0.04, Mann-Whitney test). The levels of IL-1², IL-6, and sTNF-R1 before and after treatment with tramadol showed no significant differences. Plasma levels of TNF-± (healthy individuals: 1.4 ± 0.5; pain patients: 5.8 ± 2.8 pg.mL-1; p = 0.01) and IL-6 (healthy individuals: 1.2 ± 0.8; pain patients: 3.5 ± 2.6 pg.mL-1; p = 0.01) were significantly higher in patients with neuropathic pain, Mann-Whitney Test. CONCLUSIONS: In patients with herniated intervertebral disks and carpal tunnel syndrome, plasma levels of TNF-± and IL-6 were higher than in healthy volunteers, while differences in the concentrations of sTNF-R and IL-1² were not observed. Plasma levels of TNF-±, but not of IL-6, sTNF-R, and IL-1², decreased after treatment with tramadol (100 mg every 12 hours).