Cyclophilin D deficiency protects against the development of mitochondrial ROS and cellular inflammation in aorta

Xiaojing Liu1, Heng Du2, Dan Chen3

  • 1Deparment of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Institute of Endocrinology and Metabolism, Shandong Academy of Clinical Medicine, Jinan, Shandong, 250021, China.

Abstract

Insights

Mitochondrial cyclophilin D (CypD) deficiency improves metabolic health and reduces vascular inflammation. Blocking CypD enhances resistance to inflammatory injuries in the aorta, offering a potential therapeutic target for cardiovascular disease.

Area of Science:

  • Cardiovascular Disease Research
  • Mitochondrial Biology
  • Inflammation and Immunology

Background:

  • Inflammation and oxidative stress are key drivers of cardiovascular disease pathology.
  • Mitochondrial cyclophilin D (CypD) regulates mitochondrial reactive oxygen species (ROS) generation and is linked to cellular inflammation.
  • The role of CypD in vascular inflammatory responses remains largely unexplored.

Purpose of the Study:

  • To investigate the impact of CypD deficiency on vascular inflammation under physical conditions.
  • To determine if CypD plays a role in modulating the inflammatory response within the aorta.

Main Methods:

  • Utilized CypD knockout (KO) mice and littermate controls.
  • Assessed aortic mitochondrial function, including complex III activity and ROS generation.
  • Quantified the expression of inflammatory markers (VCAM-1, IL-6, TNF-α) in mouse aortas.

Main Results:

  • CypD deficiency improved whole-body metabolic status in mice.
  • Aortic mitochondria showed increased complex III activity and reduced ROS generation in CypD KO mice.
  • Expression of key inflammatory molecules (VCAM-1, IL-6, TNF-α) was attenuated in the aorta of CypD-deficient mice.

Conclusions:

  • Mitochondrial CypD is implicated in regulating aortic inflammation.
  • Blocking CypD enhances vascular resilience against inflammatory damage.
  • Targeting mitochondrial CypD presents a potential strategy for mitigating vascular inflammatory injuries.

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