ArticleJournal of neuroinflammation2026
Forkhead box versus NF-κB hippocampal snRNA-seq profiles distinguish anti-Drebrin- and anti-GAD65-positive encephalitis.
Article in Journal of neuroinflammation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
BACKGROUND AND
objectivesAutoantibodies (ABs) against intracellular proteins, including glutamate-decarboxylase 65 (anti-GAD65), are increasingly recognized in autoimmune and limbic encephalitis (AE/LE). Anti-GAD65 LE frequently progresses to severe temporal lobe epilepsy (TLE), neuropathologically characterized by hippocampal sclerosis (HS) and variable infiltration of cytotoxic T lymphocytes (CTLs). Recently, we have identified Drebrin (DBN) as a new intracellular target protein of ABs in index patients with suspected AE. Here, we aim to characterize key molecular and cellular signatures of hippocampal tissue from anti-GAD65- (GAD65-TLE) versus anti-DBN-positive TLE (DBN-TLE) patients correlated to clinical parameters.
methodsWe examined hippocampal neuropathology and performed exploratory single-nucleus RNA sequencing (snRNA-seq) of hippocampal tissue from DBN- and GAD65-TLE patients, integrated with key clinical data from a large patient cohort.
resultsAlthough the hippocampi of the two patient groups were neuropathologically virtually indistinguishable, exploratory snRNA-seq revealed distinct transcriptional programs. DBN-TLE patients (n = 2) showed transcriptional signatures enriched for forkhead box (Fox) transcription factor family, whereas GAD65-TLE patients (n = 2) displayed transcriptional signatures enriched for transcripts related to NF-κB- signaling. In a larger cohort, DBN-TLE patients (n = 22) showed significantly more favorable pharmacological responsiveness than GAD65-TLE patients (n = 35), who were largely pharmacoresistant. Notably, in a T cell-mediated mouse model for LE, similar inflammatory programs were dynamically regulated.
conclusionThese findings provide a discovery-based transcriptomic signatures of rare autoimmune hippocampal tissue, revealing distinct immune-associated transcriptional states in anti-DBN- versus anti-GAD65-positive AE/TLE patients despite virtually indistinguishable hippocampal pathology in both groups and support further investigations of disease-specific therapeutic strategies.
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