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024 7 _ |a 10.1016/j.jns.2022.120540
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100 1 _ |a Madlener, Marie
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245 _ _ |a Glutamic acid decarboxylase antibody-associated neurological syndromes: Clinical and antibody characteristics and therapy response
260 _ _ |a Amsterdam [u.a.]
|c 2023
|b Elsevier Science
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520 _ _ |a Background: Antibodies against glutamic acid decarboxylase (GAD-abs) at high serum levels are associated with diverse autoimmune neurological syndromes (AINS), including cerebellar ataxia, epilepsy, limbic encephalitis and stiff-person syndrome. The impact of low serum GAD-ab levels in patients with suspected AINS remains controversial. Specific intrathecal GAD-ab synthesis may serve as a marker for GAD-ab-associated nervous system autoimmunity. We present characteristics of a multicentric patient cohort with suspected AINS associated with GAD antibodies (SAINS-GAD+) and explore the relevance of serum GAD-ab levels and intrathecal GAD-ab synthesis. Methods: All patients with SAINS-GAD+ included in the registry of the German Network for Research on Autoimmune Encephalitis (GENERATE) from 2011 to 2019 were analyzed. High serum GAD-ab levels were defined as RIA>2000 U/mL, ELISA>1000 U/mL, or as a positive staining pattern on cell-based assays. Results: One-hundred-one patients were analyzed. In descending order they presented with epilepsy/limbic encephalitis (39%), cerebellar ataxia (28%), stiff person syndrome (22%), and overlap syndrome (12%). Immunotherapy was administered in 89% of cases with improvements in 46%. 35% of SAINS-GAD+ patients had low GAD-ab serum levels. Notably, unmatched oligoclonal bands in CSF but not in serum were more frequent in patients with low GAD-ab serum levels. GAD-ab-levels (high/low) and intrathecal GAD-ab synthesis (present or not) did not impact clinical characteristics and outcome. Conclusions: Overall, immunotherapy in SAINS-GAD+ was moderately effective. Serum GAD-ab levels and the absence or presence of intrathecal GAD-ab synthesis did not predict clinical characteristics or outcomes in SAINS-GAD+. The detection of unmatched oligoclonal bands might outweigh low GAD-ab serum levels.
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700 1 _ |a Strippel, Christine
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700 1 _ |a Thaler, Franziska S.
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700 1 _ |a Doppler, Kathrin
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700 1 _ |a Wandinger, Klaus P.
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700 1 _ |a Lewerenz, Jan
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700 1 _ |a Ringelstein, Marius
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700 1 _ |a Roessling, Rosa
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700 1 _ |a Menge, Til
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700 1 _ |a Wickel, Jonathan
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700 1 _ |a Kellingshaus, Christoph
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700 1 _ |a Mues, Sigrid
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700 1 _ |a Kraft, Andrea
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700 1 _ |a Linsa, Andreas
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700 1 _ |a Tauber, Simone C.
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700 1 _ |a Berg, Florian Then
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700 1 _ |a Gerner, Stefan T.
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700 1 _ |a Paliantonis, Asterios
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700 1 _ |a Finke, Alexander
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700 1 _ |a Priller, Josef
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700 1 _ |a Schirotzek, Ingo
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700 1 _ |a Süße, Marie
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700 1 _ |a Sühs, Kurt W.
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700 1 _ |a Urbanek, Christian
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700 1 _ |a Senel, Makbule
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700 1 _ |a Sommer, Claudia
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700 1 _ |a Kuempfel, Tania
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700 1 _ |a Pruess, Harald
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700 1 _ |a Fink, Gereon R.
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700 1 _ |a Melzer, Nico
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700 1 _ |a Malter, Michael P.
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