RESUMO
BACKGROUND: The type 2 deviated immunological state is predominant in lepromatous leprosy. Erythema nodosum leprosum (ENL) is an immune-complex mediated reaction that typically occurs in lepromatous leprosy. To date, the serum levels of tumor necrosis factor (TNF)-alpha, interleukin (IL)-2 receptor, IL-10, IL-1beta, IL-1 receptor antagonist and monocyte chemoattractant protein-1 (MCP-1) were reported to be higher in lepromatous leprosy. TNF-alpha is also known to be higher in ENL, which is reduced after thalidomide treatment. However the serum type 2 chemokine levels in lepromatous leprosy patients have not been reported. METHODS: The serum levels of the type 2 chemokines such as thymus and activation-regulated chemokine (TARC), macrophage-derived chemokine (MDC) and eotaxin together with IL-12 and IL-10 in the sera from leprosy patients were detected using an enzyme-linked solvent assay (ELISA) method. RESULTS: The Serum TARC, MDC, eotaxin, IL-10 and IL-12 levels in lepromatous leprosy patients were not significantly different from the normal control levels. The serum levels were not significantly different between the paucibacillary group and multibacillary group. The serum TARC or MDC levels in the ENL patients were more reduced after a treatment containing thalidomide. CONCLUSION: The type 2 chemokines are not related to the severity of lepromatous leprosy. The larger reducing effect of the TARC or MDC levels in ENL patients by a treatment containing thalidomide suggests the potential role of these chemokines in the development of ENL and the therapeutic mechanism of thalidomide.
Assuntos
Humanos , Quimiocina CCL17 , Quimiocina CCL2 , Quimiocina CCL22 , Quimiocinas , Eritema Nodoso , Interleucina-1 , Interleucina-10 , Interleucina-12 , Interleucinas , Hanseníase , Hanseníase Virchowiana , Receptores de Interleucina-10 , Talidomida , Fator de Necrose Tumoral alfaRESUMO
BACKGROUND: Interleukin(IL)-8 is a potent chemotactic factor for neutrophils which was induced by tumor necrosis factor-a and IL-1. Serum IL-8 level was known to be associated with the poor prognosis of tuberculosis and IL-8 mRNA was increased in the tissue of erythema nodosum leprosum. OBJECTIVE: Our purpose was to investigate whether the serum IL-8 levels of leprosy patients are different from those of controls and whether the severity of the leprosy is associated with the serum IL-8 level. METHODS: Twenty eight patients with leprosy and fourteen healthy adults were used in this study. Serum IL-8 levels were detected by enzyme immunoassay. RESULTS: There were no statistically significant differences in the serum IL-8 levels between the twenty eight leprosy patients and the fourteen healthy control serums (29.99±53.14 vs 2.52±7.53) nor was the detection rate between the groups (9/28 vs 1/14) significant. There were also no statistically significant differences between the serum IL-8 concentrations of the patients with high bacterial indexes and the patients with low bacterial indexes (30.22±63.64 vs 29.73±41.14). CONCLUSION: Serum levels and the detection rate of IL-8 in the leprosy patients were not different from the control group and the severity of the disease was not associated with the IL-8 levels.
Assuntos
Adulto , Humanos , Eritema Nodoso , Técnicas Imunoenzimáticas , Interleucina-1 , Interleucina-8 , Hanseníase , Necrose , Neutrófilos , Prognóstico , RNA Mensageiro , TuberculoseRESUMO
Although the effect of ultraviolet (UV) irradiation on immune response was reported to supress cellular immune response, the exact mechanism was not elucidated. As recent development in cytokine research progress, it is well-known that immune response is regulated by cytokines and especially cellular immune response is induced by interferon (IFN)-r and interleukin (IL)-12 which is mainly produced from lymphocytes and macrophages respectively. Therefore our purpose was to elucidate the UV effect on cellular immune response and its mechanism. We have investigated the changes of host resistance by injection of Listeria monocytogenes which is an intracellular parasite after UVB irradiation in C57BL/6 mice which is known to have relatively strong cellular immune response. In addition we also have investigated the changes in the production of IFN-r from lymphocytes and the production of tumor necrosis factor (TNF)-a and IL-12 from macrophages in mice by UVB irradiation. The increase of mouse spleen index and susceptibility of iisteria monocytogenes infection was correlated with the decreased production of IFN-r, TNF-a and IL-12, which was known to induce the suppression of cellular imrnune response.