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Mitochondrial DNA-Mediated Inflammation in Acute Kidney Injury and Chronic Kidney Disease

Lini Jin1, Binfeng Yu1, Ines Armando2

  • 1Kidney Disease Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Institute of Nephrology, Zhejiang University, Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, Zhejiang, China.

Oxidative Medicine and Cellular Longevity
|July 26, 2021
PubMed

Insights

Mitochondrial DNA (mtDNA) abnormalities contribute to kidney disease by triggering inflammation. Targeting these pathways offers a promising therapeutic strategy for acute and chronic kidney conditions.

Area of Science:

  • Nephrology
  • Immunology
  • Molecular Biology

Background:

  • Mitochondrial integrity is crucial for kidney function.
  • Mitochondrial DNA (mtDNA) abnormalities, such as aberrant copy number (mtDNA-CN), are linked to kidney injury and disease.
  • Urinary mtDNA-CN shows potential as a diagnostic biomarker for kidney function.

Purpose of the Study:

  • To review the role of mitochondrial DNA (mtDNA) in kidney inflammation and fibrosis.
  • To summarize mtDNA-sensing pathways involved in kidney pathogenesis.
  • To highlight therapeutic strategies targeting mtDNA-mediated inflammation in kidney diseases.

Main Methods:

  • Review of existing literature on mtDNA, innate immunity, and kidney disease.
  • Analysis of mechanisms by which extracellular mtDNA triggers inflammatory responses.
  • Examination of the role of mtDNA sensing pathways (TLR9, cGAS-STING, inflammasomes) in kidney pathophysiology.

Main Results:

  • Mitochondrial DNA (mtDNA) released under stress activates innate immune sensing pathways.
  • These pathways, including Toll-like receptor 9 (TLR9) and cGAS-STING, mediate kidney inflammation and fibrosis.
  • Aberrant mtDNA copy number (mtDNA-CN) is associated with acute kidney injury and chronic kidney disease.

Conclusions:

  • Mitochondrial DNA (mtDNA) plays a significant role in the pathogenesis of various kidney diseases.
  • Targeting mtDNA-mediated inflammatory pathways presents a novel therapeutic avenue for kidney disorders.
  • Further research into mtDNA-sensing mechanisms can lead to improved diagnostics and treatments for kidney conditions.

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