Neutrophil Transcriptomics in SLE: Exploring Intrinsic, Ex Vivo Adaptation, and CAR T-Cell Therapy-Induced Changes
ObjectivesSystemic lupus erythematosus (SLE) is an autoimmune disease characterized by dysregulation of the adaptive and innate immunityThis study aimed to identify transcriptomic differences in neutrophils from SLE patients and healthy individuals, analyze ex vivo adaptation dynamics, and evaluate the impact of chimeric antigen receptor (CAR) T-cell therapy on neutrophil transcriptomic profiles. MethodsNeutrophils were isolated via negative selection from seven SLE patients and three healthy individuals. RNA sequencing was performed to assess transcriptomic differences, ex vivo dynamics over 60 minutes, and responses to lipopolysaccharide (LPS) stimulation. Additionally, longitudinal transcriptomic data from an SLE patient undergoing KYV-101 anti-CD19 CAR T-cell therapy were evaluated. ResultsWe identified 258 differentially expressed genes (DEGs) consistently distinguishing SLE from healthy neutrophils; they spanned multiple clusters, enriched in interferon-related and DNA damage repair genes (upregulated), and ribosomal protein genes (downregulated). Ex vivo adaptation revealed shared activation pathways, such as NF-{kappa}B and apoptosis, in both groups. LPS stimulation highlighted overlapping inflammatory responses, demonstrating retained functional capacities in SLE neutrophils. Following CAR T-cell therapy of an SLE patient,neutrophil transcriptomic profiles realigned with healthy controls by three months post-treatment. ConclusionsNeutrophils in SLE exhibit intrinsic, disease-specific transcriptomic alterations while sharing ex vivo adaptation dynamics with healthy individuals. The disease-specific alterations appear to be modifiable through targeted therapeutic intervention, as anti-CD19 CAR T-cell therapy resets neutrophil gene expression toward healthy patterns despite targeting B cells rather than neutrophils directly. These findings provide insights into SLE pathogenesis and highlight potential therapeutic strategies targeting both adaptive and innate immunity.