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Updated: May 7, 2026

A Simple Cell-based Immunofluorescence Assay to Detect Autoantibody Against the N-Methyl-D-Aspartate NMDA Receptor in Blood
Published on: January 9, 2018
Cognitive impairment in antibody-mediated autoimmune encephalitis: subtype-specific clinical features and mechanistic
Wenxian Sun1, Ying Bi1, Zhiming Kang1
1Department of Neurology, Zhongnan Hospital of Wuhan University, Wuhan, China.
Abstract:
Cognitive impairment is one of the most prevalent and persistent sequelae of antibody-mediated autoimmune encephalitis (AE). This review summarizes the clinical phenotypes and current mechanistic understanding of AE-related cognitive dysfunction across major antibody subtypes, while placing particular emphasis on anti-NMDAR encephalitis, for which the experimental evidence is most comprehensive. On this basis, we propose an evidence-informed multilevel framework spanning molecular, cellular, and systems-level mechanisms. Available evidence indicates that autoantibody-mediated NMDAR internalization disrupts synaptic function and is accompanied by glial activation and neuroinflammatory responses. These interacting processes may impair hippocampal neuronal integrity and suppress hippocampal neurogenesis, thereby contributing to altered neuronal remodeling. Over time, such microscopic disturbances are thought to converge into large-scale connectivity abnormalities, particularly within hippocampal-cortical circuits and the default mode network, and may underlie persistent deficits in memory, attention, and executive function. Taken together, this synapse-to-network framework provides an integrative perspective on the pathogenesis of cognitive impairment in AE and may help guide future therapeutic strategies focused on neuroprotection and circuit recovery.
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