Cited by 116Retinal Development and DisordersRetinal Diseases and TreatmentsNeurogenesis and neuroplasticity mechanisms

CNTF induces photoreceptor neuroprotection and Müller glial cell proliferation through two different signaling pathways in the adult zebrafish retina

Kassen, Sean C., Thummel, Ryan, Campochiaro, Laura A., Harding, Molly J., Bennett, Natalie A., Hyde, David R.·2009·Experimental Eye Research

Abstract

Ciliary neurotrophic factor (CNTF) acts in several processes in the vertebrate retina, including neuroprotection of photoreceptors in the stressed adult retina and regulation of neuronal progenitor cell proliferation during retinal development. However, the signaling pathway it utilizes (Jak/Stat, MAPK, or Akt) in these processes is ambiguous. Because dark-adapted albino zebrafish exhibit light-induced rod and cone cell death and subsequently regenerate the lost photoreceptor cells, zebrafish should be a useful model to study the role of CNTF in both neuroprotection and neuronal progenitor cell proliferation. We therefore investigated the potential roles of CNTF in both the undamaged and light-damaged adult zebrafish retinas. Intraocular injection of CNTF suppressed light-induced photoreceptor cell death, which then failed to exhibit the regeneration response that is marked by proliferating Müller glia and neuronal progenitor cells. Inhibiting the MAPK signaling pathway, but neither the Stat3 nor Akt pathways, significantly reduced the CNTF-mediated neuroprotection of light-induced photoreceptor cell death. Intraocular injection of CNTF into non-light-treated (undamaged) eyes mimicked constant intense light treatment by increasing Stat3 expression in Müller glia followed by increasing the number of proliferating Müller glia and neuronal progenitors. Knockdown of Stat3 expression in the CNTF-injected non-light-treated retinas significantly reduced the number of proliferating Müller glia, while coinjection of CNTF with either MAPK or Akt inhibitors did not inhibit the CNTF-induced Müller glia proliferation. Thus, CNTF utilizes a MAPK-dependant signaling pathway in neuroprotection of light-induced photoreceptor cell death and a Stat3-dependant signaling pathway to stimulate Müller glia proliferation.

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Crossref · 10.1016/j.exer.2009.01.007

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Authors
Kassen, S. C., Thummel, R., Campochiaro, L. A., Harding, M. J., Bennett, N. A., & Hyde, D. R.
Affiliations
University of Notre Dame (US)
Corresponding author
Hyde, David R.
Venue
Experimental Eye Research
Publisher
Elsevier BV
Published
2009-06
Volume
88
Issue
6
Pages
1051-1064
ISSN
0014-4835 (ISSN-L)
OpenAlex
W1969182690
Cited by
116
References
62
Citations by year
2026: 4 · 2025: 5 · 2024: 1 · 2023: 7 · 2022: 5 · 2021: 12 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 6 · 2016: 4 · 2015: 10 · 2014: 7 · 2013: 11 · 2012: 9
FWCI
4.01
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Eye Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
ciliary neurotrophic factor, photoreceptor regeneration, MAPK signaling, STAT3 signaling, Akt signaling, neural progenitor cells, zebrafish retina, retinal development
MeSH terms
Animals, Nerve Regeneration, Neuroglia, Photic Stimulation, Radiation Injuries, Retina, Retinal Diseases, Stem Cells, Zebrafish, Signal Transduction, Apoptosis, Neuroprotective Agents, In Situ Nick-End Labeling, Photoreceptor Cells, Vertebrate, Ciliary Neurotrophic Factor, MAP Kinase Signaling System, Cell Proliferation, STAT3 Transcription Factor, Opsins

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