PGC‐1α regulates the interplay between oxidative stress, senescence and autophagy in the ageing retina important in age‐related macular degeneration

Author:

Gurubaran Iswariyaraja Sridevi1,Watala Cezary2,Kostanek Joanna2,Szczepanska Joanna3,Pawlowska Elzbieta3,Kaarniranta Kai14,Blasiak Janusz5ORCID

Affiliation:

1. Department of Ophthalmology University of Eastern Finland Kuopio Finland

2. Department of Haemostatic Disorders Medical University of Lodz Lodz Poland

3. Department of Pediatric Dentistry Medical University of Lodz Lodz Poland

4. Department of Ophthalmology Kuopio University Hospital Kuopio Finland

5. Faculty of Medicine, Collegium Medicum Mazovian Academy in Plock Plock 09‐402 Poland

Abstract

AbstractWe previously showed that mice with knockout in the peroxisome proliferator‐activated receptor gamma coactivator 1‐alpha (PPARGC1A) gene encoding the PGC‐1α protein, and nuclear factor erythroid 2 like 2 (NFE2L2) gene, exhibited some features of the age‐related macular degeneration (AMD) phenotype. To further explore the mechanism behind the involvement of PGC‐1α in AMD pathogenesis we used young (3‐month) and old (12‐month) mice with knockout in the PPARGC1A gene and age‐matched wild‐type (WT) animals. An immunohistochemical analysis showed age‐dependent different expression of markers of oxidative stress defence, senescence and autophagy in the retinal pigment epithelium of KO animals as compared with their WT counterparts. Multivariate inference testing showed that senescence and autophagy proteins had the greatest impact on the discrimination between KO and WT 3‐month animals, but proteins of antioxidant defence also contributed to that discrimination. A bioinformatic analysis showed that PGC‐1α might coordinate the interplay between genes encoding proteins involved in antioxidant defence, senescence and autophagy in the ageing retina. These data support importance of PGC‐1α in AMD pathogenesis and confirm the utility of mice with PGC‐1α knockout as an animal model to study AMD pathogenesis.

Publisher

Wiley

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