Los niveles séricos de Interleucina 22 e Interleucina 6 disminuyen luego del tratamiento en pacientes con artritis reumatoidea / Interleukin 22 and Interleukin 6 Serum Levels Decrease After Treatment in Rheumatoid Arthritis Patients

Introducción: La artritis reumatoidea se caracteriza por inflamación de la membrana sinovial debido al infiltrado de células inmunitarias que secretan citocinas relacionadas a perfil Th17 como IL-22 e IL-6. La dinámica de estas citocinas durante el tratamiento permanece incomprendida. El objetivo fue evaluar los niveles séricos y en líquido sinovial (LS) de IL-22 e IL-6, correlacionarlos con diferentes parámetros bioquímicos y clínicos y medir sus cambios post-tratamiento. Material y métodos: Se estudiaron 77 pacientes con AR y 30 controles. A 30 pacientes se los evaluó nuevamente luego de 3 meses de tratamiento y a 12 se les extrajo LS. Se midió VSG, PCR, FR, anti-CCPhs, IL-22 e IL-6. Se evaluó la actividad con DAS28 y respuesta al tratamiento con criterios EULAR. Resultados: IL-22 e IL-6 fueron similares entre pacientes y controles. Sus niveles disminuyeron luego del tratamiento, principalmente en pacientes respondedores. IL-22 fue menor e IL-6 mayor en LS que en sangre. IL-6 correlacionó positivamente con PCR y anti-CCPhs. Los niveles de VSG, PCR y DAS28 fueron mayores en pacientes con valores dosables de IL-6 que en no dosables. Conclusión: En pacientes con valores basales dosables de IL-22 e IL-6, los niveles de estas citocinas podrían utilizarse como marcador adicional de respuesta al tratamiento.

Introduction: Rheumatoid arthritis is characterized by synovium inflammation due to the infiltration of immune cells that secrete Th17 cytokines like IL-22 and IL-6. The dynamics of these cytokines during the treatment remain unknown. The aim of this study was to evaluate the levels of IL-22 and IL-6 serum and synovial fluid (SF) in correlation with different biochemical and clinical parameters and treatment-associated changes. Material and methods: Seventy-seven RA patients and 30 controls were recruited. Thirty patients were evaluated after 3 months of treatment and SF was collected of 12 patients. ESR, CRP, RF, anti-CCP hs, IL-22 e IL-6 were measured. DAS28 was used to assess disease activity and response to treatment followed EULAR criteria. Results: There were not differences in serum IL-22 and IL-6 levels between patients and controls. Cytokine levels decreased after treatment, mainly in responder patients. IL-22 was decreased and IL-6 was increased in SF compared to serum. IL-6 correlated positively with CRP and anti-CCPhs. ESR, CRP and DAS28 were increased in patients with detectable IL-6 compared to those with undetectable IL-6. Conclusion: In patients with detectable serum IL-22 and IL-6 levels before treatment initiation, follow-up of cytokine levels could be an useful additional tool to evaluate treatment response.

Apoptosis de linfocitos asociada a enfermedades infecciosas / [Lymphocyte apoptosis associated to infections]

During infections, the presence of lymphocyte apoptosis both in peripheral blood and in lymphatic organs has been described. This kind of programmed cell death can be either induced by host control mechanisms aimed at eliminating infected lymphocytes and/or retaining immune system homeostasis, or by the pathogen in order to complete its life cycle, spreading the infection and/or suppressing the immune response. Thus, apoptosis has advantages and disadvantages for the host depending on the pathogen life cycle and/or the specificity of the lymphocyte population affected. Identification of the mechanisms involved in autoreactive or pathogen-specific lymphocyte apoptosis could lead to strategies designed to interfere immunologically or pharmacologically in favor of the host.