Related Experiment Video

Updated: Jul 1, 2025

Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase COX/SDH Double-labeling Histochemistry
06:53

Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase COX/SDH Double-labeling Histochemistry

Published on: November 23, 2011

36.8K

Mitochondrial DNA leakage triggers inflammation in age-related cardiovascular diseases

Wanyue Ding1, Jingyu Chen2, Lei Zhao1

  • 1Heilongjiang Academy of Traditional Chinese Medicine, Harbin, China.

Frontiers in Cell and Developmental Biology
|March 1, 2024
PubMed

Insights

Mitochondrial DNA (mtDNA) leakage from senescent cells drives inflammation and cardiovascular aging. Targeting mtDNA may offer new strategies for screening and treating age-related cardiovascular diseases.

Area of Science:

  • Cardiovascular Aging
  • Mitochondrial Biology
  • Immunology

Background:

  • Mitochondrial dysfunction is a key feature of cardiovascular aging.
  • Senescent cells release mitochondrial DNA (mtDNA), which can trigger inflammatory responses.
  • Dysfunctional mitochondrial quality control exacerbates mtDNA-induced inflammation.

Purpose of the Study:

  • To summarize mechanisms linking mtDNA to inflammation and cardiovascular aging.
  • To discuss the potential of mtDNA as a biomarker and therapeutic target.

Main Methods:

  • Review of recent studies on mtDNA, inflammation, and aging.
  • Analysis of innate immune pathways activated by mtDNA (e.g., cGAS-STING, TLR-9, inflammasomes).

Main Results:

  • Leaked mtDNA activates cellular DNA sensors, initiating innate immune responses.
  • Chronic inflammation driven by mtDNA contributes to age-related cardiovascular diseases.
  • Impaired mitophagy can lead to pathogenic mtDNA release.

Conclusions:

  • mtDNA leakage is a critical factor in cardiovascular aging and inflammation.
  • Targeting mtDNA offers potential for early screening and novel therapies for cardiovascular diseases.
Keywords:
cardiovasuclar diseasesinflammationinnate immunitymitochondrial DNAsenescence

More Related Videos

Author Spotlight: Decoding Mitochondrial Aging08:48

Author Spotlight: Decoding Mitochondrial Aging

Published on: June 30, 2023

3.9K
Measuring Liver Mitochondrial Oxygen Consumption and Proton Leak Kinetics to Estimate Mitochondrial Respiration in Holstein Dairy Cattle08:29

Measuring Liver Mitochondrial Oxygen Consumption and Proton Leak Kinetics to Estimate Mitochondrial Respiration in Holstein Dairy Cattle

Published on: November 30, 2018

11.3K

Related Concept Videos

Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
12.5K
Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
7.6K
Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
10.3K
Inflammation01:38

Inflammation

Overview
53.4K
The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
3.4K
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
3.1K