Investigation of neuronal auto-antibodies in systemic lupus erythematosus patients with epilepsy

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• 作者：Zerrin Karaaslan^a ; ^{zkaraaslan@gmail.com} ; Esme Ekizoğlu^a ; ^{esmeekizoglu@yahoo.com} ; Pınar Tektü ; rk^a ; ^{pinartopaloglu2000@yahoo.com} ; Ece Erdağ^b ; ^{eceerdag@gmail.com} ; Erdem Tü ; zü ; n^b ; ^{drerdem@yahoo.com} ; Nerses Bebek^a ; ^{nersesb@yahoo.com} ; Candan Gü ; rses^a ; ^{candangrss@gmail.com} ; Betü ; l Baykan^a ; ^{baykanb@istanbul.edu.tr}
• 关键词：Epilepsy ; Neuronal auto-antibodies ; Hippocampal neuropil ; Systemic lupus erythematosus
• 刊名：Epilepsy Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：129
• 期：Complete
• 页码：132-137
• 全文大小：1049 K
• 卷排序：129

文摘

Epilepsy is an important feature for neuropsychiatric involvement in systemic lupus erythematosus (SLE) with unknown mechanism. Our aim was to investigate the presence of neuronal auto-antibodies (NAbs) in neuropsychiatric SLE (NPSLE).MethodsEighteen SLE patients (17 females, 1 male) experiencing recurrent seizures were enrolled to this study. Their clinical characteristics, EEG and MRI findings and follow-up information were evaluated from their files. Antibodies against voltage-gated potassium channel (VGKC)-complex antigens, contactin-associated protein-like 2 (CASPR-2), leucine-rich, glioma inactivated 1 (LGI1), glutamic acid decarboxylase (GAD), N-methyl-d-aspartate receptor (NMDA-R), alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid receptor (AMPA-R) and type B gamma aminobutyric acid receptors (GABAB-R) were screened in the sera of these patients. Moreover, indirect immunohistochemistry and immunocytochemistry tests were performed to reveal neuropil antibodies.ResultsSix out of 18 patients (33.3%) had various forms of NAbs. Among them, one patient had antibodies against GAD, one patient with hippocampal sclerosis on MRI was CASPR-2 antibody positive, whereas the remaining four patients showed hippocampal neuropil staining. We could not find a significant difference between seropositive and seronegative groups, regarding the clinical characteristics, EEG and MRI findings.ConclusionThis study is the first to show hippocampal neuronal staining (4/18) reflecting antibodies against unknown neuronal cell surface antigens in SLE patients with epilepsy, besides the rare occurrence of GAD and CASPR2 antibodies. Further prospective studies are needed to search for new NAbs and uncover their pathogenic role in SLE associated with epilepsy.