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Epinephrine, but not dexamethasone, induces apoptosis in retinal pigment epithelium cells in vitro: possible implications on the pathogenesis of central serous chorioretinopathy

  • Santiago A. B. Sibayan
  • Karin Kobuch
  • Detlev Spiegel
  • Elfriede Eckert
  • Rita Leser
  • J. Monzer
  • Veit-Peter Gabel
Laboratory Investigation

Abstract 

Background: The pathogenesis of central serous chorioretinopathy is poorly understood. It is believed to be due to dysfunction of the retinal pigment epithelium and/or choroid and has been associated with elevated levels of epinephrine and administration of corticosteroids. Epinephrine and corticosteroids have previously been shown to induce apoptosis (programmed cell death) in various types of cells. The objective of this study was to investigate whether these agents can induce apoptosis in cultured retinal pigment epithelium cells. This may help elucidate the pathogenesis of central serous chorioretinopathy.Methods: Third-passage porcine retinal pigment epithelium cells were grown to confluence and incubated for 1–7 days in culture medium containing epinephrine (102–109 pg/ml) or a corticosteroid, dexamethasone (4–4×104 ng/ml). The cultures were evaluated for apoptosis by phase-contrast microscopy and in situ terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling.Results: Epinephrine (7×107– 109 pg/ml) induced apoptosis in a dose- and time-dependent manner. Exposure to lower concentrations of epinephrine (102–6×107 pg/ml) and all tested levels of dexamethasone did not result in apoptosis.Conclusion: Retinal pigment epithelium cells may undergo apoptosis following exposure to elevated levels of epinephrine. These findings suggest a possible pathophysiologic mechanism for the development of central serous chorioretinopathy.

Keywords

Microscopy Cell Death Corticosteroid Dexamethasone Epinephrine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Santiago A. B. Sibayan
    • 1
  • Karin Kobuch
    • 1
  • Detlev Spiegel
    • 1
  • Elfriede Eckert
    • 1
  • Rita Leser
    • 1
  • J. Monzer
    • 1
  • Veit-Peter Gabel
    • 1
  1. 1.Klinik und Poliklinik für Augenheilkunde, Klinikum der Universität Regensburg, 93053 Regensburg, GermanyDE

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