Multi-omics Study Identifies c-Jun as Key Driver of Diabetic Kidney Disease
Researchers used an integrated multi-omics approach to map the molecular landscape of diabetic nephropathy, identifying the transcription factor c-Jun as a central regulator of tubular injury and fibrosis. The study combined single-cell imaging, spatial transcriptomics, RNA sequencing, and chromatin profiling of human kidney tissue, then validated findings in mouse models. The results provide a spatially resolved framework for understanding disease progression and suggest c-Jun as a potential therapeutic target.
A new preprint study published on bioRxiv presents a comprehensive multi-omics characterization of human diabetic nephropathy (DN), a leading cause of end-stage renal disease. By integrating single-cell multiplexed protein imaging, spatial transcriptomics, single-nucleus and single-cell RNA sequencing, and chromatin accessibility profiling, researchers mapped kidney cell types, their spatial distributions, and immune-fibrotic interactions in diseased tissue. The analysis identified eight distinct cellular neighborhoods that define the immune-fibrotic microenvironment and revealed molecular networks underlying tubular injury and fibrosis. The transcription factor c-Jun emerged as a central regulator of transcriptional reprogramming in injured tubules, a finding corroborated in a diabetic mouse model. Crucially, inducible tubular-specific c-Jun activation in mice was sufficient on its own to trigger tubular injury, chronic inflammation, progressive fibrosis, and systemic metabolic disruptions including impaired glucose homeostasis. The study also found reduced expression of SLC4A4, a bicarbonate transporter critical for proximal tubular function, in injured tubules. These findings collectively position c-Jun as a key mechanistic driver of diabetic kidney disease and offer a detailed molecular map to guide future therapeutic development.
What's missing
As a preprint, this work has not yet undergone formal peer review, and its findings should be interpreted with caution. The study does not address whether pharmacological inhibition of c-Jun in established DN models can reverse or halt disease progression, which would be a critical next step for therapeutic translation. The degree to which findings from the mouse models faithfully recapitulate human DN pathology also remains an open question. Additionally, the causal relationship between reduced SLC4A4 expression and tubular injury is not fully established.
What different sources said
- bioRxivCenter
A multi-omics map of diabetic nephropathy links c-Jun activation to tubular injury and metabolic stress
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