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Protección basada en anticuerpos contra la infección por VIH mediante inmunoprofilaxis vectorial

Alejandro B Balazs¹, Joyce Chen, Christin M Hong

¹Division of Biology, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA.

|December 6, 2011

Resumen

La inmunoprofilaxis vectorial (VIP) utiliza la transferencia de genes para permitir la producción de anticuerpos contra el VIH durante toda la vida. Este enfoque demostró una protección completa en ratones contra la infección por VIH de alto riesgo, lo que sugiere un potencial para la profilaxis humana.

Área de la Ciencia:

Inmunología Inmunología.
Virología Virología.
Biotecnología La biotecnología es la biotecnología.

Sus antecedentes:

Desarrollar una vacuna eficaz contra el virus de la inmunodeficiencia humana (VIH) sigue siendo un desafío significativo.
Se han identificado anticuerpos ampliamente neutralizantes (bNAbs) capaces de neutralizar diversas cepas del VIH.
Estos bNAbs poseen altas mutaciones somáticas, lo que indica una maduración de afinidad extensa.

Objetivo del estudio:

Explorar una estrategia alternativa para la prevención del VIH utilizando la transferencia de genes mediada por vectores.
Desarrollar y evaluar la inmunoprofilaxis vectorial (VIP) para la expresión sostenida de anticuerpos.

Principales métodos:

Utilizó un vector de virus adeno-asociado especializado para la administración intramuscular de genes.
Ingeniería de secreción de por vida de anticuerpos monoclonales ampliamente neutralizantes en ratones.
Protección evaluada contra el desafío intravenoso con VIH capaz de replicarse en ratones humanizados.

Principales resultados:

VIP indujo la expresión de los anticuerpos monoclonales durante toda la vida en altas concentraciones en ratones.
Los ratones humanizados que recibieron VIP estaban completamente protegidos de la infección por el VIH.
La protección se observó incluso después de la provocación intravenosa con altas dosis de VIH.

Conclusiones:

La inmunoprofilaxis vectorial (VIP) ofrece un enfoque práctico para la producción sostenida de anticuerpos.
VIP demuestra potencial como una estrategia profiláctica eficaz contra la infección por el VIH.
Una mayor traducción a la aplicación humana puede dar lugar a un nuevo método de prevención del VIH.

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