Mecanismos de activación de las células T asesinas naturales invariantes (iNKT)
DOI:
https://doi.org/10.17533/udea.iatreia.v29n1a05Palabras clave:
α-galactosilceramida, células inkt, CD1d, glicolípidos, presentación antigénica, TCRResumen
Aunque se ha logrado un conocimiento amplio acerca de las células T asesinas naturales (iNKT), aún no existe consenso sobre sus mecanismos de activación. Dichas células reconocen diferentes antígenos glicolipídicos presentados por medio de la molécula CD1d, los cuales pueden ser endógenos, exógenos derivados de organismos como bacterias y sintéticos desarrollados para aplicaciones clínicas. Existe mucho interés en entender cómo estas distintas variantes glicolipídicas inducen diferentes tipos de polarización, pero ha sido muy difícil llegar a un consenso, debido a que la respuesta depende de varios factores como la naturaleza, la internalización y el procesamiento de los glicolípidos. Además, la activación de las células iNKT la determinan el tipo y estado de activación de la célula presentadora de antígeno, las moléculas coestimuladoras, los mecanismos de transactivación y la localización de los complejos CD1d-glicolípido en distintas microrregiones de la membrana plasmática, como las balsas lipídicas. Esta revisión explora la evidencia sobre los factores que afectan la activación de las células iNKT con el fin de entender su potencial inmunomodulador.
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