The Journal of Neuroscience, August 15, 2001, 21(16):6214-6220
Acute Neuronal Apoptosis in a Rat Model of Multiple Sclerosis
Roman
Meyer2,
Robert
Weissert2,
Ricarda
Diem1,
Maria K.
Storch3,
Katrien L.
de
Graaf2,
Birgit
Kramer1, and
Mathias
Bähr1
1 Neurologische Universitätsklinik, 37075 Göttingen, Germany, 2 Neurologische
Universitätsklinik, 72076 Tübingen, Germany, and
3 Neurologische Universitätsklinik, 8036 Graz,
Austria
Demyelination caused by inflammation of the CNS has been
considered to be a major hallmark of multiple sclerosis (MS). Using experimental autoimmune encephalomyelitis, a model of MS, we
demonstrate that an immune-mediated attack of the optic nerve is
accompanied by an early degeneration of retinal ganglion cells (RGCs).
The decrease of neuronal cell density was correlated with functional disabilities as assessed by visual evoked cortical potentials and
electroretinogram. Visual acuity was significantly reduced. DNA
degradation and activation of caspase-3 in RGCs indicate that cell
death of RGCs is apoptotic. These findings show for the first time that
an inflammatory attack against myelin components can lead to acute
neuronal cell loss by apoptosis.
Key words:
experimental autoimmune encephalomyelitis; visual evoked
potentials; electroretinogram; CNS pathology; caspase-3; retinal
ganglion cells
Copyright © 2001 Society for Neuroscience 0270-6474/01/21166214-07$05.00/0