ArticleLupus science & medicine2025
Lupus nephritis serum induces changes in gene expression in human glomerular endothelial cells, which is modulated by L-sepiapterin: implications for redox-mediated endothelial dysfunction.
Article in Lupus science & medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- A skin-kidney neutrophil axis links ultraviolet exposure to renal angiogenesis and tissue remodeling in healthy and lupus kidneys.Journal of immunology (Baltimore, Md. : 1950) · 2026Article
- The endothelium response to kidney injury.Nature reviews. Nephrology · 2026Review
- Oxidative-Stress-Associated Molecular Signatures in Immune-Mediated Diseases: A Systematic Review Integrating Machine Learning and Systems Biology Approaches.Antioxidants (Basel, Switzerland) · 2026Review
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6 authors.
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Abstract
objectiveLupus nephritis (LN) is characterised by renal endothelial dysfunction, which contributes to progressive kidney injury. Endothelial nitric oxide synthase (eNOS) plays a modulating role in LN, as genetic ablation of the eNOS enzyme worsens disease. Serum from patients with active LN induces uncoupling of eNOS homodimers, leading to superoxide (SO) rather than nitric oxide (NO) production by eNOS. This uncoupling is reversed with L-sepiapterin (L-Sep). This study was designed to further examine changes in gene expression in glomerular endothelial cells induced by LN serum and whether treatment with L-Sep can ameliorate these changes.
methodsPrimary human renal glomerular endothelial cells (HRGECs) were cultured with serum from healthy controls (HCs), patients with LN during remission (LN rem) or patients with LN during flare (LN flare) with and without L-Sep. Bulk RNA sequencing was performed on RNA isolated from cultured cells. Differential gene expression was determined, and pathway and gene enrichment analyses were performed on differentially expressed genes.
resultsL-Sep treatment induced differential gene expression after culture in HRGECs cultured with LN flare serum. Addition of L-Sep induced genes involved in promoting endothelial function and enriched for pathways of NO biosynthetic and metabolic processes, fatty acid and lipid biosynthesis, neurotransmitter biosynthesis, reactive oxygen biosynthesis, vascular endothelial growth factor production and regulation of smooth muscle contraction.
conclusionsThese results indicate that glomerular endothelial cells can mount an active inflammatory response in an LN serum environment. More importantly, L-Sep modulates gene expression in a fashion consistent with reduction of oxidative stress and increased NO production. These findings provide the rationale to target endothelial dysfunction to modulate LN with L-Sep as a therapeutic.
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