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El COVID-19 se caracteriza por un compartimiento mieloide desregulado
Jonas Schulte-Schrepping1, Nico Reusch1, Daniela Paclik2
1Life and Medical Sciences (LIMES) Institute, University of Bonn, Germany.
Cell
|August 19, 2020
Resumen
El COVID-19 grave implica mielopoyesis de emergencia y neutrófilos disfuncionales, a diferencia de los casos leves con monocitos inflamatorios. Este estudio detalla los cambios en las células inmunes en la infección por SARS-CoV-2.
Área de la Ciencia:
- Inmunología
- Virología
- Hematología
Sus antecedentes:
- La enfermedad por coronavirus 2019 (COVID-19) puede variar desde una enfermedad respiratoria leve hasta una insuficiencia respiratoria grave.
- Los mecanismos inmunológicos subyacentes a la protección leve contra el COVID-19 y la patogénesis de enfermedades graves, particularmente con respecto a los neutrófilos y la desregulación inmunológica, no se comprenden completamente.
Objetivo del estudio:
- Investigar los cambios dinámicos en la composición y activación de las células inmunes en COVID-19 leve versus grave.
- Para dilucidar la respuesta inmune sistémica a la infección por SARS-CoV-2 a nivel de una sola célula.
Principales métodos:
- Se utilizó la secuenciación de ARN de una sola célula y la proteómica de una sola célula en células mononucleares de sangre completa y periférica.
- Analizó 242 muestras de 109 individuos en dos cohortes y dos centros a lo largo del tiempo.
Principales resultados:
- El COVID-19 leve mostró monocitos inflamatorios HLA-DRhiCD11chi elevados con una firma genética estimulada por el interferón.
- El COVID-19 severo se caracterizó por precursores de neutrófilos (mielopoyesis de emergencia), neutrófilos maduros disfuncionales y monocitos HLA-DRlo.
Conclusiones:
- El estudio revela profundas alteraciones en el compartimiento celular mieloide en COVID-19 grave.
- Conocimientos detallados sobre la respuesta inmune sistémica a la infección por SARS-CoV-2, destacando los perfiles de células mieloides distintas en la enfermedad leve frente a la grave.
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