Cited by 102Retinal Diseases and TreatmentsOcular Diseases and Behçet’s SyndromeRetinal Development and Disorders

Control of Chemokine Gradients by the Retinal Pigment Epithelium

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Shi, Guangpu, Maminishkis, Arvydas, Banzon, Tina, Jalickee, Stephen, Li, Rong, Hammer, Jeffrey, Miller, Sheldon S.·2008·Investigative Opthalmology & Visual Science

Abstract

PURPOSE: Proinflammatory cytokines in degenerative diseases can lead to the loss of normal physiology and the destruction of surrounding tissues. In the present study, the physiological responses of human fetal retinal pigment epithelia (hfRPE) were examined in vitro after polarized activation of proinflammatory cytokine receptors. METHODS: Primary cultures of hfRPE were stimulated with an inflammatory cytokine mixture (ICM): interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha, and interferon (IFN)-gamma. Western blot analysis and immunofluorescence were used to determine the expression/localization of the cytokine receptors on hfRPE. Polarized secretion of cytokines was measured. A capacitance probe technique was used to measure transepithelial fluid flow (J(V)) and resistance (R(T)). RESULTS: IL-1R1 was mainly localized to the apical membrane and TNFR1 to the basal membrane, whereas IFN-gammaR1 was detected on both membranes. Activation by apical ICM induced a significant secretion of angiogenic and angiostatic chemokines, mainly across the hfRPE apical membrane. Addition of the ICM to the basal but not the apical bath significantly increased net fluid absorption (J(V)) across the hfRPE within 20 minutes. Similar increases in J(V) were produced by a 24-hour exposure to ICM, which significantly decreased total R(T). CONCLUSIONS: Chemokine gradients across the RPE can be altered (1) through an ICM-induced change in polarized chemokine secretion and (2) through an increase in ICM-induced net fluid absorption. In vivo, both of these factors could contribute to the development of chemokine gradients that help mediate the progression of inflammation/angiogenesis at the retina/RPE/choroid complex.

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  1. [41]Snedecor GW, Cochran WG. Statistical Methods. 8th ed. Iowa State University Press; Ames, IA: 1989. [Google Scholar]

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Authors
Shi, G., Maminishkis, A., Banzon, T., Jalickee, S., Li, R., Hammer, J., & Miller, S. S.
Affiliations
National Institutes of Health (US)
Venue
Investigative Opthalmology & Visual Science
Published
2008-10-01
Volume
49
Issue
10
Pages
4620
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W2032878302
Cited by
102
References
84
Citations by year
2026: 1 · 2025: 2 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 6 · 2019: 2 · 2018: 5 · 2017: 5 · 2016: 7 · 2015: 8 · 2014: 4 · 2013: 6 · 2012: 12
FWCI
9.46
Type
journal article
Language
en
Open access
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (1z01ey000419-05, Z01 EY000419)
  • National Eye Institute (Z01EY000435)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Health Sciences › Medicine › Ophthalmology › Ocular Diseases and Behçet’s Syndrome
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
retinal pigment epithelium, chemokine gradients, inflammatory cytokines, interleukin-1 receptor, TNF receptor, interferon-gamma receptor, transepithelial electrical resistance, fluid absorption, angiogenesis, inflammation, choroid, cytokine receptors
MeSH terms
Interferon gamma Receptor, Biological Transport, Active, Body Water, Cell Membrane, Drug Combinations, Fetus, Humans, Interferon-gamma, Microscopy, Fluorescence, Pigment Epithelium of Eye, Tumor Necrosis Factor-alpha, Blotting, Western, Receptors, Interferon, Cell Culture Techniques, Receptors, Tumor Necrosis Factor, Type I, Receptors, Interleukin-1 Type I, Interleukin-1beta

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