Cell-Specific Transposable Element Gene Expression Analysis Identifies Associations with Systemic Lupus Erythematosus...

Area of Science:

• Immunology
• Genetics
• Molecular Biology

Background:

• Systemic lupus erythematosus (SLE) pathogenesis involves interferon (IFN) dysregulation.
• Transposable elements (TEs) are implicated in autoimmune diseases, potentially driving IFN production and autoantibody generation.

Approach:

• RNA sequencing of sorted immune cells (CD4+ T cells, monocytes, B cells, NK cells) from 120 SLE patients.
• Quantification of TE expression and identification of differentially expressed (DE) TEs across various SLE phenotypes.
• Analysis of DE TE enrichment in specific families and association with antiviral genes and pathways.

Key Points:

• Identified 27,135 TEs, with 731 found to be differentially expressed (DE) in SLE patients.
• DE TE expression patterns were cell-specific and phenotype-specific.
• Increased DE TE expression correlated with antiviral genes (e.g., LY6E, ISG15, TRIM22) and interferon signaling pathways.

Conclusions:

• TE expression contributes to SLE pathogenesis through cell-specific activation of immune mechanisms.
• TEs represent potential biomarkers for SLE diagnostics.
• Targeting TE expression may offer novel therapeutic strategies for SLE.