Send to

Choose Destination
Neurobiol Dis. 2003 Jul;13(2):124-35.

Contribution of caspase-8 to apoptosis of axotomized rat retinal ganglion cells in vivo.

Author information

Department of Neurology, University Hospital Göttingen, Robert-Koch-Strasse 40, 37075 Göttingen, Germany.


We have investigated the role of caspase-8 and its mode of activation during apoptosis of adult rat retinal ganglion cells (RGCs) in vivo. Retinal pro-caspase-8 expression was almost completely restricted to RGCs. Although caspase-8 is known to be involved in death-receptor-dependent apoptosis, measurable caspase-8 activity or even RGC death could be induced by neither tumor necrosis factor-alpha nor Fas ligand injections into unlesioned eyes. However, substantial caspase-8 activation could be detected after optic nerve transection as shown by a fluorogenic activity assay and Western blot analysis. Intravitreal injection of caspase-8 inhibitors significantly attenuated degeneration of RGCs and reduced the number of RGCs showing caspase-3 activation. A late peak of caspase-8 activity and additive protective effects of caspase-8 and -9 inhibition on axotomized RGCs place caspase-8 in our model rather late in the apoptosis cascade, possibly after the onset of mitochondrial dysfunction.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center