Published in:
01-03-2015 | Translational Neurosciences - Short communication
Stiff person-syndrome IgG affects presynaptic GABAergic release mechanisms
Authors:
Christian Werner, Holger Haselmann, Andreas Weishaupt, Klaus V. Toyka, Claudia Sommer, Christian Geis
Published in:
Journal of Neural Transmission
|
Issue 3/2015
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Abstract
The majority of patients with stiff person-syndrome (SPS) are characterized by autoantibodies to glutamate decarboxylase 65 (GAD65). In previous passive-transfer studies, SPS immunoglobulin G (IgG) induced SPS core symptoms. We here provide evidence that SPS-IgG causes a higher frequency of spontaneous vesicle fusions. Sustained GABAergic transmission and presynaptic GABAergic vesicle pool size remained unchanged. Since these findings cannot be attributed to anti-GAD65 autoantibodies alone, we propose that additional autoantibodies with so far undefined antigen specificity might affect presynaptic release mechanisms.