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Identificación de macrófagos y virus Epstein-Barr en biopsias de pacientes con Síndrome de Sjögren
Negro, Gastón; castro, Isabel; Martínez, Benjamín; Aguilera, Sergio; Molina, Claudio; González, Julieta; González, Sergio.
  • Negro, Gastón; s.af
  • castro, Isabel; s.af
  • Martínez, Benjamín; s.af
  • Aguilera, Sergio; s.af
  • Molina, Claudio; s.af
  • González, Julieta; s.af
  • González, Sergio; s.af
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1385247
RESUMEN
RESUMEN El síndrome de Sjögren (SS) es una enfermedad crónica mediada inmunológicamente. La presencia de macrófagos y el virus Epstein-Barr (VEB) se ha relacionado con su desarrollo y severidad. Los macrófagos contribuyen al proceso autoinmune local y la infección viral promueve el quiebre de la auto-tolerancia. Objetivos. Identificar la presencia de Macrófagos en el infiltrado inflamatorio y VEB en células inflamatorias, correlacionándolos con las características histológicas de glándulas salivales labiales. Metodología. En biopsias de glándulas salivales labiales (8 pacientes y 7 individuos controles) se realizó inmunohistoquímica antiCD-68 para identificar macrófagos. El conteo de macrófagos y células inflamatorias se efectuó en relación a su distribución en las glándulas salivales. La presencia del virus fue evaluada mediante hibridación in situ e inmunohistoquímica para LMP1. Se utilizó el test t no pareado y de Mann-Whitney para comparar los grupos, y coeficiente de correlación de Pearson para correlacionar con parámetros histológicos. Resultados. Se observó un mayor número de macrófagos en el infiltrado inflamatorio de pacientes (p=0,001**). Los macrófagos se distribuyeron difusamente en las glándulas de controles y en los focos inflamatorios de pacientes. En ambos grupos no se detectó la presencia del virus Epstein-Barr. Conclusión. Los pacientes con síndrome de Sjögren presentaron mayor presencia de macrófagos y su incremento es a expensas del foco inflamatorio.
ABSTRACT
ABSTRACT Sjögren's syndrome (SS) is an immunologically mediated chronic disease of complex etiopathogenesis. Macrophages and Epstein-Barr virus are among the factors related to its development and severity. Macrophages contribute to the local autoimmune process and viral infection promotes the breakdown of self-tolerance. Objectives. Identify the presence of macrophages in the inflammatory infiltrate and Epstein-Barr virus in inflammatory cells, correlating them with the histological features of labial salivary glands. Methodology. In labial salivary glands biopsies of 8 patients and 7 control individuals, anti-CD-68 immunohistochemistry was performed to identify macrophages. The macrophages and inflammatory cells were counted in relation to their distribution in the salivary glands. The presence of the virus was evaluated by in situ hybridization for viral RNA and immunohistochemistry for latent membrane protein type 1. The comparison between both groups was made using the unpaired t-test and Mann-Whitney test. The correlations with histological parameters were established with the Pearson´s correlation coefficient. Results. A greater number of macrophages was observed in the inflammatory infiltrate of SS patients (p=0,001**). Macrophages in control individuals were diffusely distributed in the gland, while, SS in patients, they were mainly located in inflammatory foci. In both groups, no inflammatory or epithelial cells infected by the Epstein-Barr virus were identified. Conclusion. Patients with Sjögren's syndrome had a greater presence of macrophages and their increase is at the expense of the inflammatory focus.

Full text: Available Index: LILACS (Americas) Type of study: Diagnostic study / Prognostic study Language: Spanish Journal: Int. j interdiscip. dent. (Print) Journal subject: Medicina Cl¡nica / Odontologia / Patologia Year: 2022 Type: Article

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Full text: Available Index: LILACS (Americas) Type of study: Diagnostic study / Prognostic study Language: Spanish Journal: Int. j interdiscip. dent. (Print) Journal subject: Medicina Cl¡nica / Odontologia / Patologia Year: 2022 Type: Article