High glucose treatment promotes extracellular matrix proteome remodeling in Muller glial cells

Sagmeister, Sandra; Merl-Pham, Juliane; Petrera, Agnese; Deeg, Cornelia A. und Hauck, Stefanie M. (2021): High glucose treatment promotes extracellular matrix proteome remodeling in Muller glial cells. In: Peerj, Bd. 9, e11316

Abstract

Background. The underlying pathomechanisms in diabetic retinopathy (DR) remain incompletely understood. The aim of this study was to add to the current knowledge about the particular role of retinal Muller glial cells (RMG) in the initial processes of DR. Methods. Applying a quantitative proteomic workflow, we investigated changes of primary porcine RMG under short term high glucose treatment as well as glycolysis inhibition treatment. Results. We revealed significant changes in RMG proteome primarily in proteins building the extracellular matrix (ECM) indicating fundamental remodeling processes of ECM as novel rapid response to high glucose treatment. Among others, Osteopontin (SPP1) as well as its interacting integrins were significantly downregulated and organotypic retinal explant culture confirmed the selective loss of SPP1 in RMG upon treatment. Since SPP1 in the retina has been described neuroprotective for photoreceptors and functions against experimentally induced cell swelling, it's rapid loss under diabetic conditions may point to a direct involvement of RMG to the early neurodegenerative processes driving DR. Data are available via ProteomeXchange with identifier PXDO15879.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Tiermedizin > Zentrum für Klinische Tiermedizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 2167-8359
• Sprache: Englisch