186
Views
36
CrossRef citations to date
0
Altmetric
Original

Increased spontaneous activity of a network of hippocampal neurons in culture caused by suppression of inhibitory potentials mediated by anti-gad antibodies

, , , , , , , , , & show all
Pages 66-73 | Published online: 07 Jul 2009
 

Abstract

Introduction: Anti-glutamic acid decarboxylase autoantibodies (GAD-Ab) are commonly considered the marker of autoimmune diabetes; they were first described in patients affected by stiff-person syndrome and recently, in ataxic or epileptic patients. The pathogenetic role of GAD-Ab remains unclear but inhibition of GABA synthesis or interference with GABA exocytosis are hypothesized. The aim of the study was to assess whether GAD-Ab interfere with neuronal transmission.

Patients and methods: Serum from a GAD-Ab positive epileptic patient (by IHC and RIA), serum from a GAD-positive (only by RIA) diabetic case, sera from two epileptic GAD-Ab negative patients and a normal control were selected. Post-synaptic inhibitory potentials (IPSPs) were registered on hippocampal neurons in culture before and after the application of diluted sera in a patch clamp study.

Results: A significant increase in the frequency of IPSPs was observed after application of GAD-positive epileptic serum, while no effect was noted using sera from negative controls.

Conclusion: The inhibition in neuronal transmission only after application of GAD-positive epileptic serum, suggests an interference with GABA function and consequently with neuronal inhibition supporting a pathogenetic role of GAD-Ab in the development of epilepsy.

Acknowledgements

We specially thank Prof. C. Betterle for performing RIA tests and Dr Joanne Fleming for linguistic revision of the manuscript.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access
  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 65.00 Add to cart
* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.