Replenishing IRAK-M expression in retinal pigment epithelium attenuates outer retinal degeneration.
Sci Transl Med
; 16(750): eadi4125, 2024 Jun 05.
Article
en En
| MEDLINE
| ID: mdl-38838135
ABSTRACT
Chronic inflammation is a constitutive component of many age-related diseases, including age-related macular degeneration (AMD). Here, we identified interleukin-1 receptor-associated kinase M (IRAK-M) as a key immunoregulator in retinal pigment epithelium (RPE) that declines during the aging process. Rare genetic variants of IRAK3, which encodes IRAK-M, were associated with an increased likelihood of developing AMD. In human samples and mouse models, IRAK-M abundance in the RPE declined with advancing age or exposure to oxidative stress and was further reduced in AMD. Irak3-knockout mice exhibited an increased incidence of outer retinal degeneration at earlier ages, which was further exacerbated by oxidative stressors. The absence of IRAK-M led to a disruption in RPE cell homeostasis, characterized by compromised mitochondrial function, cellular senescence, and aberrant cytokine production. IRAK-M overexpression protected RPE cells against oxidative or immune stressors. Subretinal delivery of adeno-associated virus (AAV)-expressing human IRAK3 rescued light-induced outer retinal degeneration in wild-type mice and attenuated age-related spontaneous retinal degeneration in Irak3-knockout mice. Our data show that replenishment of IRAK-M in the RPE may redress dysregulated pro-inflammatory processes in AMD, suggesting a potential treatment for retinal degeneration.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Degeneración Retiniana
/
Ratones Noqueados
/
Estrés Oxidativo
/
Quinasas Asociadas a Receptores de Interleucina-1
/
Epitelio Pigmentado de la Retina
Límite:
Animals
/
Humans
/
Male
Idioma:
En
Año:
2024
Tipo del documento:
Article