Cited by 228Neuroinflammation and Neurodegeneration MechanismsRetinal Diseases and TreatmentsRetinal Development and Disorders

Adaptive Müller Cell Responses to Microglial Activation Mediate Neuroprotection and Coordinate Inflammation in the Retina

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Wang, Minhua, Ma, Wenxin, Zhao, Lian, Fariss, Robert N, Wong, Wai T·2011·Journal of Neuroinflammation

Abstract

Purpose: Microglia and Müller cells are prominent participants in retinal responses to injury and disease that shape eventual tissue adaptation or damage. This investigation examined how microglia and Müller cells interact with each other following initial microglial activation. Methods: Mouse Müller cells were cultured alone, or co-cultured with activated or unactivated retinal microglia, and their morphological, molecular, and functional responses were evaluated. Müller cell-feedback signaling to microglia was studied using Müller cell-conditioned media. Corroborative in vivo analyses of retinal microglia-Müller cell interactions in the mouse retina were also performed. Results: Our results demonstrate that Müller cells exposed to activated microglia, relative to those cultured alone or with unactivated microglia, exhibit marked alterations in cell morphology and gene expression that differed from those seen in chronic gliosis. These Müller cells demonstrated in vitro (1) an upregulation of growth factors such as GDNF and LIF, and provide neuroprotection to photoreceptor cells, (2) increased pro-inflammatory factor production, which in turn increased microglial activation in a positive feedback loop, and (3) upregulated chemokine and adhesion protein expression, which allowed Müller cells to attract and adhere to microglia. In vivo activation of microglia by intravitreal injection of lipopolysaccharide (LPS) also induced increased Müller cell-microglia adhesion, indicating that activated microglia may translocate intraretinally in a radial direction using Müller cell processes as an adhesive scaffold. Conclusion: Our findings demonstrate that activated microglia are able to influence Müller cells directly, and initiate a program of bidirectional microglia-Müller cell signaling that can mediate adaptive responses within the retina following injury. In the acute aftermath following initial microglia activation, Müller cell responses may serve to augment initial inflammatory responses across retinal lamina and to guide the intraretinal mobilization of migratory microglia using chemotactic cues and adhesive cell contacts. Understanding adaptive microglia-Müller cell interactions in injury responses can help discover therapeutic cellular targets for intervention in retinal disease.

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  • Inflammatory immune responses for ocular gene therapies become harder to predict in the clinical setting, as both physiological and barrier functions of immune privilege may already be compromised by aging or the ocular disorder physiopathological conditions such as inflammation or oxidative stress induction.

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Authors
Wang, M., Ma, W., Zhao, L., Fariss, R. N., & Wong, W. T.
Affiliations
National Institutes of Health (US)
Corresponding author
Wong, Wai T
Venue
Journal of Neuroinflammation
Published
2011-12
Volume
8
Issue
1
Pages
173-173
ISSN
1742-2094 (ISSN-L)
OpenAlex
W2077349110
Cited by
228
References
61
Citations by year
2026: 12 · 2025: 17 · 2024: 14 · 2023: 20 · 2022: 20 · 2021: 32 · 2020: 18 · 2019: 11 · 2018: 24 · 2017: 14 · 2016: 11 · 2015: 12 · 2014: 14 · 2013: 5 · 2012: 4
FWCI
4.07
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
Müller cells, retinal microglia, microglial activation, neuroprotection, photoreceptors, glial cell line-derived neurotrophic factor, LiF, pro-inflammatory factors, chemokines, cell adhesion, microglial migration, lipopolysaccharide, retinal inflammation, gliosis, retinal damage
MeSH terms
Animals, Cell Adhesion, Cell Communication, Cells, Cultured, Chemotaxis, Gliosis, Inflammation, Mice, Inbred C57BL, Retina, Culture Media, Conditioned, Apoptosis, Microglia, Neuroprotective Agents, Coculture Techniques, Cell Proliferation, Mice

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