gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

Retinal endothelial angiogenic activity: effects of hypoxia and glial (Müller) cells

Meeting Abstract

  • corresponding author Y. Yafai - University of Leipzig, Eye Hospital, Leipzig
  • I. Iandiev - University of Leipzig, Paul Flechsig Institute of Brain Research, Department of Neurophysiology, Leipzig
  • P. Wiedemann - University of Leipzig, Eye Hospital, Leipzig
  • A. Reichenbach - University of Leipzig, Paul Flechsig Institute of Brain Research, Department of Neurophysiology, Leipzig
  • W. Eichler - University of Leipzig, Eye Hospital, Leipzig

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogP 133

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Veröffentlicht: 22. September 2004

© 2004 Yafai et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Objective

To explore neovascularization-related activities of cultured retinal endothelial cells in response to hypoxia, and their modulation by retinal glial (Müller) cells.

Methods

Bovine retinal endothelial cells (BRECs) were cultured under normoxia or hypoxia (0.5% O2) either alone, together with the human Müller cell line MIO-M1, or in normoxia- or hypoxia-conditioned media of MIO-M1 cells. Cell number, proliferation, apoptotic cell death, and migration of BRECs were determined.

Results

Exposure of BRECs to hypoxia for 24 h decreased the number of adherent cells and the proliferation rate but increased apoptosis and cell migration. Increased apoptosis of the BRECs occured also in the presence of conditioned media of MIO-M1 cells but not during co-culture with MIO-M1 cells. Under normoxic conditions, co-culture resulted in increased proliferation, but decreased the migration rates of BRECs. Under hypoxia, the presence of Müller cells decreased the proliferation and migration rates of BRECs.

Conclusions

Hypoxia inhibits the proliferation of retinal endothelial cells. Müller cells release soluble mediators that enhance this hypoxia-mediated effect but, under certain conditions (i.e., in co-culture), may protect retinal endothelial cells from apoptosis, thus supporting their survival. Whereas the key signal(s) necessary to trigger retinal endothelial proliferation under hypoxia remain(s) to be determined, our observations indicate that Müller cells may be effective in preventing retinal neovascularization.