Fas-activated apoptosis and apoptosis mediators in human trabecular meshwork cells

Rajnee Agarwal, Mihir Talati, Wendi Lambert, Abbot Clark, Steven E. Wilson, Neeraj Agarwal, Robert J. Wordinger

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35 Scopus citations

Abstract

A gradual loss of cells occurs within the human trabecular meshwork during normal aging and appears to be increased in patients with primary open-angle glaucoma. The exact mechanism by which cells are lost in either condition is not known, however phagocytosis, cell migration and cell death have been suggested. Apoptosis is one method by which cell death can occur. We have examined the modulators for apoptosis within the human trabecular meshwork using both cell lines and ex-vivo dissected trabecular meshwork tissues obtained from normal donors. Using RT-PCR it was shown that mRNA for several modulators of apoptosis (Fas, Bcl-2, Bcl-xl, Bax, and ICE) are expressed by both cell lines and ex-vivo tissues. Apoptosis was stimulated to occur by treating cell lines with a monoclonal antibody (IgM) to Fas. Apoptosis was verified via morphological changes to the cells, transferase- mediated dUTP nick-end labeling TUNEL Immunofluorescence, and DNA laddering. Control cells exposed to IgM did not undergo apoptosis. These results represent the first report of apoptosis modulators within the human trabecular meshwork and demonstrate that human trabecular meshwork cells can be stimulated to undergo apoptosis via the Fas/FasL pathway.

Original languageEnglish
Pages (from-to)583-590
Number of pages8
JournalExperimental eye research
Volume68
Issue number5
DOIs
StatePublished - 1 Jan 1999

Keywords

  • Apoptosis
  • Bax
  • Bcl- xl
  • Bcl-2
  • Fas
  • Fas ligand
  • Glaucoma
  • ICE
  • Trabecular meshwork

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    Agarwal, R., Talati, M., Lambert, W., Clark, A., Wilson, S. E., Agarwal, N., & Wordinger, R. J. (1999). Fas-activated apoptosis and apoptosis mediators in human trabecular meshwork cells. Experimental eye research, 68(5), 583-590. https://doi.org/10.1006/exer.1998.0636