ArticleBiogerontology2022
The glutamate/GABA system in the retina of male rats: effects of aging, neurodegeneration, and supplementation with melatonin and antioxidant SkQ1.
Article in Biogerontology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 21 citations in OpenAlex.
- The Eye as a Window to Neurodegeneration: Oxidative Stress, Optic Nerve Vulnerability, and Retinal Biomarkers-A Scoping Review.Antioxidants (Basel, Switzerland) · 2026Review
- Topical eye treatment with JGRi1, a protein/protein interaction inhibitor, mitigates retinal degeneration.Cell death & disease · 2026Article
- Axonopathy: mechanisms and potential therapeutic targets for neurodegenerative diseases.Translational neurodegeneration · 2026Review
- From Neurotransmission to Retinal Pathophysiology: Unraveling the Role of GABA Receptors in Retinal Disease Progression.Journal of neurochemistry · 2025Review
- Strabismus and nystagmus in oculocutaneous albinism: clinical perspectives, diagnosis, and role of neurotransmitters.Neurogenetics · 2025Review
- Review
- Recent Advances in Our Understanding of Age-Related Macular Degeneration: Mitochondrial Dysfunction, Redox Signaling, and the Complement System.Aging and disease · 2024Review
- The Healthy and Diseased Retina Seen through Neuron-Glia Interactions.International journal of molecular sciences · 2024Review
- CX3CL1/CX3CR1 Signaling Mediated Neuroglia Activation Is Implicated in the Retinal Degeneration: A Potential Therapeutic Target to Prevent Photoreceptor Death.Investigative ophthalmology & visual science · 2024Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Glutamate and -aminobutyric acid (GABA) are the most abundant amino acids in the retina. An imbalance of the glutamate/GABA system is involved in the pathogenesis of various neurodegenerative disorders. Here we for the first time analyzed alterations of expression of glutamate- and GABA-synthesizing enzymes, transporters, and relevant receptors in the retina with age in Wistar rats and in senescence-accelerated OXYS rats who develop AMD-like retinopathy. We noted consistent age-dependent expression changes of GABAergic-system proteins (GAD67, GABA-T, and GAT1) in OXYS and Wistar rats: upregulation by age 3 months and downregulation at age 18 months. At a late stage of AMD-like retinopathy in OXYS rats (18 months), there was significant upregulation of glutaminase and downregulation of glutamine synthetase, possibly indicating an increasing level of glutamate in the retina. AMD-like-retinopathy development in the OXYS strain was accompanied by underexpression of glutamate transporter GLAST. Prolonged supplementation with both melatonin and SkQ1 (separately) suppressed the progression of the AMD-like pathology in OXYS rats without affecting the glutamate/GABA system but worsened the condition of the Wistar rat's retina during normal aging. We observed decreasing protein levels of glutamine synthetase, GLAST, and GABAAR1 and an increasing level of glutaminase in Wistar rats. In summary, both melatonin and mitochondrial antioxidant SkQ1 had different effect on the retinal glutamate / GABA in healthy Wistar and senescence-accelerated OXYS rats.
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