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Congreso EADV 2024: Se confirma el vínculo entre el estrés y la recaída de la psoriasis
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EADV

Sep 26, 2024, 18:01 ET

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Congreso EADV 2024: Una nueva investigación confirma el vínculo entre el estrés percibido y la recaída de la psoriasis

Una investigación innovadora ha aportado pruebas contundentes de que el estrés percibido puede desencadenar directamente la recaída de las lesiones cutáneas psoriásicas. El estudio, presentado hoy en el Congreso EADV 2024, es el primero en validar científicamente esta conexión in vivo.

AMSTERDAM, 26 de septiembre de 2024 /PRNewswire/ -- La psoriasis, una enfermedad crónica de la piel que afecta a más de 6 millones de personas en Europa, se caracteriza por una rápida producción de células cutáneas, lo que provoca descamación e inflamación. Si bien desde hace tiempo se sospecha que el estrés desempeña un papel en la exacerbación de la psoriasis, esta investigación ofrece evidencia concluyente de este vínculo.

En el estudio, se indujeron lesiones psoriásicas en xenoinjertos de piel humana sana en ratones (n=25) mediante la inyección de células mononucleares de sangre periférica autólogas, preactivadas in vitro con IL-2. Después de lograr la remisión de las lesiones con dexametasona tópica, los ratones fueron expuestos a estrés sónico (sonido) o simulado durante 24 horas. Luego se hizo un seguimiento de la recurrencia de las lesiones psoriásicas durante los 14 días siguientes.

Sorprendentemente, el estrés sónico provocó una recaída de las lesiones psoriásicas en todos los xenoinjertos de piel humana en un plazo de 14 días. Esto estuvo acompañado de cambios significativos en los fenómenos cutáneos relacionados con la psoriasis, incluidos un aumento del espesor epidérmico, la expresión de K16, la proliferación de queratinocitos, la expresión de péptidos antimicrobianos y la activación inmunitaria de las células intraepidérmicas.

Análisis posteriores mostraron que el estrés sónico aumentó significativamente la presencia de células inmunes en la piel y elevó los mediadores proinflamatorios. Además, se regularon positivamente los biomarcadores de inflamación neurogénica. El estrés sónico también provocó niveles elevados de triptasa, lo que indica la activación de los mastocitos, y una mayor expresión de NK-1R, el receptor de la sustancia P (SP).

"El estrés psicoemocional desencadena la liberación de neuropéptidos proinflamatorios como la SP, lo que provoca una inflamación cutánea neurogénica mediante la activación de las células inmunitarias, en particular a través de la desgranulación de los mastocitos", explicó el profesor Amos Gilhar, investigador principal del estudio. "Esto se ve amplificado por la hormona liberadora de corticotropina (CRH) y el factor de crecimiento nervioso (NGF), que aumentan la inflamación y promueven la hiperproliferación de los queratinocitos, lo que desencadena y empeora las lesiones psoriásicas en individuos susceptibles".

El equipo de investigación también evaluó la eficacia del aprepitant, un antagonista antiemético del receptor de neuroquinina-1 (NK1-R) aprobado por la FDA, para prevenir la recaída de la psoriasis inducida por el estrés. El aprepitant previno la recaída en el 80 % de los casos y normalizó la mayoría de los marcadores inflamatorios.

"El aprepitant es muy prometedor como posible terapia para las exacerbaciones de la psoriasis inducidas por el estrés", señaló el profesor Gilhar, aunque advierte sobre su uso fuera de indicación y la necesidad de más datos de seguridad. "El aprepitant actúa selectivamente sobre el componente inducido por SP de la inflamación neurogénica, pero no afecta a otros mediadores como el factor de crecimiento nervioso (NGF) y la hormona del crecimiento (CRH). La combinación de antagonistas del receptor NK-1 con otros tratamientos puede resultar más eficaz".

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