期刊
AGING CELL
卷 16, 期 1, 页码 173-182出版社
WILEY
DOI: 10.1111/acel.12540
关键词
age-related macular degeneration; monocytes; OTX2; retinal pigment epithelium; TNF-alpha; visual cycle
资金
- INSERM
- ANR MACLEAR [ANR-15-CE14-0015-01]
- Labex Lifesenses
- Carnot
- Association de Prevoyance Sante de ALLIANZ
- ANR within Investissements d'Avenir program [ANR-10-LABX-65, ANR-11-IDEX-0004-02]
- Agence Nationale de la Recherche (ANR) [ANR-15-CE14-0015] Funding Source: Agence Nationale de la Recherche (ANR)
Orthodenticle homeobox 2 (OTX2) controls essential, homeostatic retinal pigment epithelial (RPE) genes in the adult. Using cocultures of human CD14(+) blood monocytes (Mos) and primary porcine RPE cells and a fully humanized system using human-induced pluripotent stem cell-derived RPE cells, we show that activated Mos markedly inhibit RPE OTX2 expression and resist elimination in contact with the immunosuppressive RPE. Mechanistically, we demonstrate that TNF-alpha, secreted from activated Mos, mediates the downregulation of OTX2 and essential RPE genes of the visual cycle among others. Our data show how subretinal, chronic inflammation and in particular TNF-alpha can affect RPE function, which might contribute to the visual dysfunctions in diseases such as age-related macular degeneration (AMD) where subretinal macrophages are observed. Our findings provide important mechanistic insights into the regulation of OTX2 under inflammatory conditions. Therapeutic restoration of OTX2 expression might help revive RPE and visual function in retinal diseases such as AMD.
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