Autophagic Upregulation Is Cytoprotective in Ischemia/Reperfusion-Injured Retina and Retinal Progenitor Cells Article Swipe
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· 2021
· Open Access
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· DOI: https://doi.org/10.3390/ijms22168446
The cytoprotective versus cytotoxic role of macroautophagy in ocular ischemia/reperfusion injuries remains controversial and its effects under hyperglycemia are unclear. We investigated the involvement of autophagy in in vitro and in vivo normoglycemic and hyperglycemic models of retinal ischemia/reperfusion injury. Retinal ischemia (2 h) and reperfusion (2 or 22 h) was induced in wild-type and type I diabetic Ins2Akita/+ mice using a middle cerebral artery occlusion model. R28 retinal precursor cells were subjected to CoCl2-induced hypoxia with or without autophagic inhibitor NH4Cl. Autophagic regulation during ischemia/reperfusion was assessed through immunohistochemical detection and Western blotting of microtubule-associated protein 1A/1B-light chain 3 (LC3) and lysosomal associated membrane protein 1 (LAMP1). Effect of autophagic inhibition on cell viability and morphology under hypoxic conditions was also evaluated. Upregulation of autophagic markers in the inner retinae was seen after two hours reperfusion, with tapering of the response following 22 h of reperfusion in vivo. LC3-II turnover assays confirmed an increase in autophagic flux in our hypoxic in vitro model. Pharmacological autophagic inhibition under hypoxic conditions decreased cell survival and induced structural changes not demonstrated with autophagic inhibition alone. Yet no statistically significant different autophagic responses in ischemia/reperfusion injuries were seen between the two glycemic states.
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- Language
- en
- Landing Page
- https://doi.org/10.3390/ijms22168446
- https://www.mdpi.com/1422-0067/22/16/8446/pdf?version=1628500622
- OA Status
- gold
- Cited By
- 8
- References
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- Related Works
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https://openalex.org/W3188384232Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/ijms22168446Digital Object Identifier
- Title
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Autophagic Upregulation Is Cytoprotective in Ischemia/Reperfusion-Injured Retina and Retinal Progenitor CellsWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2021Year of publication
- Publication date
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2021-08-06Full publication date if available
- Authors
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Larissa Ho Ching Tang, Frederic K. C. Fung, Angela Lai, Ian Yat Hin Wong, Kendrick Co Shih, Acy LoList of authors in order
- Landing page
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https://doi.org/10.3390/ijms22168446Publisher landing page
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https://www.mdpi.com/1422-0067/22/16/8446/pdf?version=1628500622Direct link to full text PDF
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- OA status
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goldOpen access status per OpenAlex
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https://www.mdpi.com/1422-0067/22/16/8446/pdf?version=1628500622Direct OA link when available
- Concepts
-
Downregulation and upregulation, Retina, Autophagy, Cell biology, Retinal, Progenitor cell, Ischemia, Reperfusion injury, Chemistry, Medicine, Biology, Ophthalmology, Neuroscience, Stem cell, Apoptosis, Biochemistry, Internal medicine, GeneTop concepts (fields/topics) attached by OpenAlex
- Cited by
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8Total citation count in OpenAlex
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2025: 1, 2024: 1, 2023: 3, 2022: 3Per-year citation counts (last 5 years)
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50Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| sustainable_development_goals[0].display_name | Good health and well-being |
| citation_normalized_percentile.value | 0.77574599 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |