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Aging (Albany NY). 2018 Aug 28;10(8):2136-2147. doi: 10.18632/aging.101537.

p62 /SQSTM1 coding plasmid prevents age related macular degeneration in a rat model.

Author information

1
Institute of Cytology and Genetics, SB RAS, Novosibirsk, Russia.
2
Novosibirsk State Regional Clinical Hospital, Novosibirsk, Russia.
3
School of Biosciences, University of Camerino, Camerino, Italy.
4
Department of Molecular Biology, Ariel University, Ariel, Israel.
5
Russian Academy of Sciences, Moscow, Russia.
6
Lomonosov Moscow State University, Moscow, Russia.
7
Research Center of Family Health and Reproduction Problems, Irkutsk, Russia.
8
Sechenov First Moscow State Medical University, Moscow, Russia.
9
Federal Center of Neurosurgery, Tyumen, Russia.
10
CureLab Oncology, Inc, Deadham, MA 02492, USA.
11
Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118, USA.
#
Contributed equally

Abstract

P62/SQSTM1, a multi-domain protein that regulates inflammation, apoptosis, and autophagy, has been linked to age-related pathologies. For example, previously we demonstrated that administration of p62/SQSTM1-encoding plasmid reduced chronic inflammation and alleviated osteoporosis and metabolic syndrome in animal models. Herein, we built upon these findings to investigate effect of the p62-encoding plasmid on an age-related macular degeneration (AMD), a progressive neurodegenerative ocular disease, using spontaneous retinopathy in senescence-accelerated OXYS rats as a model. Overall, the p62DNA decreased the incidence and severity of retinopathy. In retinal pigment epithelium (RPE), p62DNA administration slowed down development of the destructive alterations of RPE cells, including loss of regular hexagonal shape, hypertrophy, and multinucleation. In neuroretina, p62DNA prevented gliosis, retinal thinning, and significantly inhibited microglia/macrophages migration to the outer retina, prohibiting their subretinal accumulation. Taken together, our results suggest that the p62DNA has a strong retinoprotective effect in AMD.

KEYWORDS:

OXYS rats; age-related macular degeneration; aging; gliosis; inflammation; p62/SQSTM1; retina

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