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Updated: Oct 12, 2025

Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice
10:31

Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice

Published on: May 2, 2025

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Linking transcription to energy: the path to understand kidney injury

Verónica Miguel1, Santiago Lamas2

  • 1Institute of Experimental Medicine and Systems Biology, RWTH Aachen University Hospital, Aachen, Germany.

Kidney International
|November 22, 2021
PubMed

Insights

Kidney injury impairs tubular cell metabolism by reducing fatty acid oxidation. Krüppel-like factor 15 (KLF15) decrease in proximal tubules disrupts this crucial energy pathway, contributing to renal fibrosis.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Cellular Metabolism

Background:

  • Metabolic dysfunction in kidney tubular cells is central to renal fibrosis.
  • Reduced fatty acid oxidation causes energy failure in the tubulointerstitium.

Purpose of the Study:

  • To investigate the transcriptional regulation of fatty acid oxidation in kidney tubular cells post-injury.
  • To identify key factors involved in metabolic derangement during renal fibrosis.

Main Methods:

  • Analysis of Krüppel-like factor 15 (KLF15) expression in proximal tubular cells.
  • Assessment of fatty acid oxidation pathways following kidney injury.
  • Investigating the role of KLF15 in regulating metabolic gene expression.

Main Results:

  • Kidney injury leads to decreased expression of KLF15 in proximal tubular cells.
  • Reduced KLF15 expression is associated with significant impairment of fatty acid oxidation.
  • This downregulation represents a novel mechanism driving metabolic failure in renal fibrosis.

Conclusions:

  • Decreased KLF15 expression in proximal tubules is a key driver of impaired fatty acid oxidation after kidney injury.
  • Targeting KLF15 may offer a therapeutic strategy for mitigating renal fibrosis by restoring cellular energy metabolism.

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