New insights into the role of mitochondria in cardiac microvascular ischemia/reperfusion injury

Jin Wang, Sam Toan, Hao Zhou

Research output: Contribution to journalReview articlepeer-review

32 Scopus citations

Abstract

As reperfusion therapies have become more widely used in acute myocardial infarction patients, ischemia-induced myocardial damage has been markedly reduced, but reperfusion-induced cardiac injury has become increasingly evident. The features of cardiac ischemia–reperfusion (I/R) injury include microvascular perfusion defects, platelet activation and sequential cardiomyocyte death due to additional ischemic events at the reperfusion stage. Microvascular obstruction, defined as a no-reflow phenomenon, determines the infarct zone, myocardial function and peri-operative mortality. Cardiac microvascular endothelial cell injury may occur much earlier and with much greater severity than cardiomyocyte injury. Endothelial cells contain fewer mitochondria than other cardiac cells, and several of the pathological alterations during cardiac microvascular I/R injury involve mitochondria, such as increased mitochondrial reactive oxygen species (mROS) levels and disturbed mitochondrial dynamics. Although mROS are necessary physiological second messengers, high mROS levels induce oxidative stress, endothelial senescence and apoptosis. Mitochondrial dynamics, including fission, fusion and mitophagy, determine the shape, distribution, size and function of mitochondria. These adaptive responses modify extracellular signals and orchestrate intracellular processes such as cell proliferation, migration, metabolism, angiogenesis, permeability transition, adhesive molecule expression, endothelial barrier function and anticoagulation. In this review, we discuss the involvement of mROS and mitochondrial morphofunction in cardiac microvascular I/R injury.

Original languageEnglish (US)
Pages (from-to)299-314
Number of pages16
JournalAngiogenesis
Volume23
Issue number3
DOIs
StatePublished - Aug 1 2020
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported in part by China Postdoctoral Science Foundation (2019TQ0128) and the NSFC (81900252, 81900254 and 81870249). Acknowledgements

Publisher Copyright:
© 2020, Springer Nature B.V.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Endothelial cells
  • Microvascular I/R injury
  • Mitochondrial dynamics
  • mROS

PubMed: MeSH publication types

  • Journal Article
  • Review
  • Research Support, Non-U.S. Gov't

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