PUBLICATION
P2X7 and A2A receptor endogenous activation protects against neuronal death caused by CoCl2 -induced photoreceptor toxicity in the zebrafish retina
- Authors
- Medrano, M.P., Pisera-Fuster, A., Bernabeu, R.O., Faillace, M.P.
- ID
- ZDB-PUB-200131-4
- Date
- 2020
- Source
- The Journal of comparative neurology 528(12): 2000-2020 (Journal)
- Registered Authors
- Medrano, Matías Pedro Nicolás
- Keywords
- A740003, BzATP, P2X7 receptor, RRID:AB_2109952, RRID:AB_2168560, RRID:AB_2315387, RRID:AB_2338000, RRID:AB_2338685, RRID:AB_2338840, RRID:AB_2738589, RRID:AB_514483, RRID:AB_628110, adenosine A2A receptor, microglia activation, photoreceptor death, progenitor proliferation
- MeSH Terms
-
- Receptors, Purinergic P2X7/metabolism*
- Animals
- Nerve Degeneration/chemically induced
- Nerve Regeneration/physiology*
- Zebrafish
- Cell Death/physiology
- Cobalt/toxicity
- Neurons/drug effects
- Neurons/metabolism
- Neurons/pathology*
- Photoreceptor Cells, Vertebrate/drug effects
- Photoreceptor Cells, Vertebrate/metabolism*
- Photoreceptor Cells, Vertebrate/pathology
- Receptor, Adenosine A2A/metabolism*
- PubMed
- 31997350 Full text @ J. Comp. Neurol.
Citation
Medrano, M.P., Pisera-Fuster, A., Bernabeu, R.O., Faillace, M.P. (2020) P2X7 and A2A receptor endogenous activation protects against neuronal death caused by CoCl2 -induced photoreceptor toxicity in the zebrafish retina. The Journal of comparative neurology. 528(12):2000-2020.
Abstract
Injured retinas in mammals do not regenerate and heal with loss of function. The adult retina of zebrafish self-repairs after damage by activating cell-intrinsic mechanisms, which are regulated by extrinsic signal interactions. Among relevant regulatory extrinsic systems, purinergic signalling regulates progenitor proliferation during retinogenesis and regeneration and glia proliferation in proliferative retinopathies. ATP-activated P2X7 (P2RX7) and adenosine (P1R) receptors are involved in the progression of almost all retinopathies leading to blindness. Here, we examined P2RX7 and P1R participation in the retina regenerative response induced by photoreceptor damage caused by a specific dose of CoCl2 . First, we found that treatment of uninjured retinas with a potent agonist of P2RX7 (BzATP) provoked photoreceptor damage and mitotic activation of multipotent progenitors. In CoCl2 -injured retinas, blockade of endogenous extracellular ATP activity on P2RX7 caused further neurodegeneration, Müller cell gliosis, progenitor proliferation and microglia reactivity. P2RX7 inhibition in injured retinas also increased the expression of lin28a and tnfα genes, which are related to multipotent progenitor proliferation. Levels of hif1α, vegf3r and vegfaa mRNA were enhanced by blockade of P2RX7 immediately after injury, indicating hypoxic like damage and endothelial cell growth and proliferation. Complete depletion of extracellular nucleotides with an apyrase treatment strongly potentiated cell death and progenitor proliferation induced with CoCl2 . Blockade of adenosine P1 and A2A receptors (A2A R) had deleterious effects and deregulated normal timing for progenitor and precursor cell proliferation following photoreceptor damage. ATP via P2RX7 and adenosine via A2A R are survival extracellular signals key for retina regeneration in zebrafish. This article is protected by copyright. All rights reserved.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping