Electrophysiological properties of the mitochondrial permeability transition pores: Channel diversity and disease implication

M. A. Neginskaya, E. V. Pavlov, S. S. Sheu

Research output: Contribution to journalArticlepeer-review

Abstract

The mitochondrial permeability transition pore (mPTP) is a channel that, when open, is responsible for a dramatic increase in the permeability of the mitochondrial inner membrane, a process known as the mitochondrial permeability transition (mPT). mPTP activation during Ca2+ dyshomeostasis and oxidative stress disrupts normal mitochondrial function and induces cell death. mPTP opening has been implicated as a critical event in many diseases, including hypoxic injuries, neurodegeneration, and diabetes. Discoveries of recent years indicate that mPTP demonstrates very complicated behavior and regulation, and depending on specific induction or stress conditions, it can function as a high-conductance pore, a small channel, or a non-specific membrane leak. The focus of this review is to summarize the literature on the electrophysiological properties of the mPTP and to evaluate the evidence that it has multiple molecular identities. This review also provides perspective on how an electrophysiological approach can be used to quantitatively investigate the biophysical properties of the mPTP under physiological, pharmacological, pathophysiological, and disease conditions.

Original languageEnglish (US)
Article number148357
JournalBiochimica et Biophysica Acta - Bioenergetics
Volume1862
Issue number3
DOIs
StatePublished - Mar 1 2021

Keywords

  • Calcium
  • Ion channel
  • Mitochondria
  • Mitochondrial permeability transition pore
  • Patch-clamp
  • ROS

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology

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