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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,...
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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
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Analysis of Mitochondrial Dysfunction During Cell Death.

Vladimir Gogvadze1,2, Boris Zhivotovsky3,4

  • 1Division of Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden. Vladimir.Gogvadze@ki.se.

Methods in Molecular Biology (Clifton, N.J.)
|June 1, 2021
PubMed
Summary
This summary is machine-generated.

Investigating cell death requires analyzing mitochondrial dysfunction and protein release. This study details methods to assess these key indicators during apoptosis.

Keywords:
Cell deathMembrane potentialMitochondriaReactive oxygen speciesRespiration

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Mitochondria are central to programmed cell death pathways.
  • Mitochondrial dysfunction and intermembrane space protein release are critical markers of apoptosis.
  • Assessing these mitochondrial parameters is essential for understanding cell death mechanisms.

Purpose of the Study:

  • To provide a comprehensive methodology for evaluating key events in mitochondrial apoptosis.
  • To detail techniques for measuring intermembrane space protein release, mitochondrial membrane potential, and cellular respiration.

Main Methods:

  • Quantification of cytochrome c release from mitochondrial intermembrane space.
  • Assessment of mitochondrial membrane potential using fluorescent dyes.
  • Measurement of cellular oxygen consumption rates via respirometry.

Main Results:

  • Established protocols for detecting and quantifying mitochondrial intermembrane space protein release.
  • Demonstrated methods for evaluating changes in mitochondrial membrane potential during apoptosis.
  • Validated techniques for assessing alterations in oxygen consumption in apoptotic cells.

Conclusions:

  • The described methods offer robust tools for the investigation of mitochondrial roles in apoptosis.
  • Accurate analysis of mitochondrial function provides critical insights into cell death processes.
  • These techniques are vital for researchers studying apoptosis and related cellular pathologies.