Articles Tagged With: NMDAR
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Autoimmune Encephalitis After Herpes Simplex Virus Encephalitis
A recent study showed that about 25% of patients with herpes simplex encephalitis develop neurological symptoms three to six weeks after the infection, pointing toward an autoimmune process with different neurological and psychiatric symptoms. Anti-neuronal antibodies, such as anti-N-methyl-D-aspartate receptor antibodies, have been found in this post-viral autoimmune encephalitis presentation.
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Neuropathological Variability of NMDAR-Encephalitis
The neuropathological features of N-methyl-D-aspartate receptor (NMDAR)-encephalitis are described in an autopsy cohort of four patients — two diagnosed in life with comorbid brain disorders, and two diagnosed at autopsy and never treated. The two untreated patients had inflammatory infiltrates composed of perivascular and parenchymal T cells and B cells/plasma cells in the basal ganglia, amygdala, and hippocampus. The two treated patients had variable pathologies that reflected their underlying neurological disorders (lymphoproliferative disease and multiple sclerosis). Overall, the topographic distribution of inflammation in patients with NMDAR-encephalitis reflects the clinical symptoms of movement disorders, abnormal behavior, and memory dysfunction with inflammation predominantly observed in the basal ganglia, amygdala, and hippocampus. Loss of NMDAR-immunoreactivity correlated with disease severity.