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Productos genéticos variables del receptor de células T y infección temprana por VIH-1
A G Dalgleish1, S Wilson, M Gompels
1Department of Cellular and Molecular Sciences, St George's Hospital Medical School, London, UK.
Lancet (London, England)
|April 4, 1992
Resumen
El virus de la inmunodeficiencia humana (VIH) puede imitar las moléculas del complejo mayor de histocompatibilidad (MHC), lo que podría desencadenar respuestas autoinmunes a través de los receptores de células T (TCR). Esta imitación podría explicar la inmunopatología relacionada con el VIH, similar a la enfermedad de injerto contra huésped.
Área de la Ciencia:
- Inmunología Inmunología.
- Virología Virología.
- La autoinmunidad es autoinmunidad.
Sus antecedentes:
- Se sabe que el virus de la inmunodeficiencia humana (VIH) causa un daño significativo en el sistema inmunológico.
- La interacción entre las proteínas virales y el sistema inmunológico del huésped, en particular los receptores de células T (TCR), es compleja y no se comprende completamente.
- Las moléculas del complejo mayor de histocompatibilidad (MHC, por sus siglas en inglés) juegan un papel crucial en el reconocimiento inmune y la discriminación entre uno mismo y otros.
Objetivo del estudio:
- Para investigar la hipótesis de que el VIH puede imitar a todos los determinantes del CMH.
- Explorar la interacción potencial entre el VIH y los receptores de células T (TCR) de las células T aloreactivas.
- Para evaluar si la infección por VIH induce autorreactividad, contribuyendo a la inmunopatología.
Principales métodos:
- Análisis de los productos del gen alfa beta TCR en individuos VIH-1-seropositivos y controles sanos.
- Utilizó un panel de anticuerpos monoclonales.
- Se empleó un método de inmunofluorescencia directa bicolor para el análisis.
Principales resultados:
- Se observó un aumento significativo en la expresión de la subfamilia V beta 5.3 TCR en individuos VIH positivos en comparación con los controles (p < 0,01).
- Este aumento específico en las secuencias beta V también se observa en varias afecciones autoinmunes.
- Los hallazgos sugieren un posible vínculo entre la infección por el VIH, la autorreactividad y la inmunopatología.
Conclusiones:
- La infección por VIH puede implicar la imitación molecular de las moléculas MHC por los componentes virales.
- Esta imitación podría conducir a la inducción de células T autorreactivas, provocando daños inmunopatológicos.
- La respuesta inmune al VIH podría parecerse a un proceso autoinmune, similar a la enfermedad de injerto contra huésped, si el VIH imita a MHC II.
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