Who let the dogs out?: detrimental role of Galectin-3 in hypoperfusion-induced retinal degeneration.
(2015) In Journal of Neuroinflammation 12(1).- Abstract
- Background
Retinal ischemia results in a progressive degeneration of neurons and a pathological activation of glial cells, resulting in vision loss. In the brain, progressive damage after ischemic insult has been correlated to neuroinflammatory processes involving microglia. Galectin-3 has been shown to mediate microglial responses to ischemic injury in the brain. Therefore, we wanted to explore the contribution of Galectin-3 (Gal-3) to hypoperfusion-induced retinal degeneration in mice.
Methods
Gal-3 knockout (Gal-3 KO) and wildtype (WT) C57BL/6 mice were subjected to chronic cerebral hypoperfusion by bilateral narrowing of the common carotid arteries using metal coils resulting in a 30% reduction of blood flow. Sham... (More) - Background
Retinal ischemia results in a progressive degeneration of neurons and a pathological activation of glial cells, resulting in vision loss. In the brain, progressive damage after ischemic insult has been correlated to neuroinflammatory processes involving microglia. Galectin-3 has been shown to mediate microglial responses to ischemic injury in the brain. Therefore, we wanted to explore the contribution of Galectin-3 (Gal-3) to hypoperfusion-induced retinal degeneration in mice.
Methods
Gal-3 knockout (Gal-3 KO) and wildtype (WT) C57BL/6 mice were subjected to chronic cerebral hypoperfusion by bilateral narrowing of the common carotid arteries using metal coils resulting in a 30% reduction of blood flow. Sham operated mice served as controls. After 17 weeks, the mice were sacrificed and the eyes were analyzed for retinal architecture, neuronal cell survival, and glial reactivity using morphological staining and immunohistochemistry.
Results
Hypoperfusion caused a strong increase in Gal-3 expression and microglial activation in WT mice, coupled with severe degenerative damage to all retinal neuronal subtypes, remodeling of the retinal lamination and Müller cell gliosis. In contrast, hypoperfused Gal-3 KO mice displayed a retained laminar architecture, a significant preservation of photoreceptors and ganglion cell neurons, and an attenuation of microglial and Müller cell activation.
Conclusion
Moderate cerebral blood flow reduction in the mouse results in severe retinal degenerative damage. In mice lacking Gal-3 expression, pathological changes are significantly attenuated. Gal-3 is thereby a potential target for treatment and prevention of hypoperfusion-induced retinal degeneration and a strong candidate for further research as a factor behind retinal degenerative disease. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5453307
- author
- Manouchehrian, Oscar LU ; Arnér, Karin LU ; Deierborg, Tomas LU and Taylor, Linnéa LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Neuroinflammation
- volume
- 12
- issue
- 1
- article number
- 92
- publisher
- BioMed Central (BMC)
- external identifiers
-
- pmid:25968897
- wos:000354971000001
- pmid:25968897
- scopus:84929472009
- ISSN
- 1742-2094
- DOI
- 10.1186/s12974-015-0312-x
- language
- English
- LU publication?
- yes
- id
- 33b3ae83-9c8f-4f55-98dd-9ac490384b0b (old id 5453307)
- date added to LUP
- 2016-04-01 15:06:15
- date last changed
- 2023-09-27 15:43:07
@article{33b3ae83-9c8f-4f55-98dd-9ac490384b0b,
abstract = {{Background<br/>Retinal ischemia results in a progressive degeneration of neurons and a pathological activation of glial cells, resulting in vision loss. In the brain, progressive damage after ischemic insult has been correlated to neuroinflammatory processes involving microglia. Galectin-3 has been shown to mediate microglial responses to ischemic injury in the brain. Therefore, we wanted to explore the contribution of Galectin-3 (Gal-3) to hypoperfusion-induced retinal degeneration in mice.<br/><br/>Methods<br/>Gal-3 knockout (Gal-3 KO) and wildtype (WT) C57BL/6 mice were subjected to chronic cerebral hypoperfusion by bilateral narrowing of the common carotid arteries using metal coils resulting in a 30% reduction of blood flow. Sham operated mice served as controls. After 17 weeks, the mice were sacrificed and the eyes were analyzed for retinal architecture, neuronal cell survival, and glial reactivity using morphological staining and immunohistochemistry.<br/><br/>Results<br/>Hypoperfusion caused a strong increase in Gal-3 expression and microglial activation in WT mice, coupled with severe degenerative damage to all retinal neuronal subtypes, remodeling of the retinal lamination and Müller cell gliosis. In contrast, hypoperfused Gal-3 KO mice displayed a retained laminar architecture, a significant preservation of photoreceptors and ganglion cell neurons, and an attenuation of microglial and Müller cell activation.<br/><br/>Conclusion<br/>Moderate cerebral blood flow reduction in the mouse results in severe retinal degenerative damage. In mice lacking Gal-3 expression, pathological changes are significantly attenuated. Gal-3 is thereby a potential target for treatment and prevention of hypoperfusion-induced retinal degeneration and a strong candidate for further research as a factor behind retinal degenerative disease.}},
author = {{Manouchehrian, Oscar and Arnér, Karin and Deierborg, Tomas and Taylor, Linnéa}},
issn = {{1742-2094}},
language = {{eng}},
number = {{1}},
publisher = {{BioMed Central (BMC)}},
series = {{Journal of Neuroinflammation}},
title = {{Who let the dogs out?: detrimental role of Galectin-3 in hypoperfusion-induced retinal degeneration.}},
url = {{https://lup.lub.lu.se/search/files/4340932/8055350.pdf}},
doi = {{10.1186/s12974-015-0312-x}},
volume = {{12}},
year = {{2015}},
}