Related Experiment Video
Updated: May 31, 2026
07:15
Mitochondrial Respiration Quantification in Yeast Whole Cells
Published on: November 8, 2024
Ischemia--reperfusion: a look from yeast mitochondria
Carlos Stella1, Isabel Burgos, S Chapela
1Departamento de Bioquímica Humana, Facultad de Medicina, Universidad de Buenos Aires, UBA, Argentina. cstella@fmed.uba.ar
Current Medicinal Chemistry
|July 16, 2011
Summary
Ischemia-reperfusion injury triggers cell death via mitochondrial permeability transition pore (mPTP) opening. Inhibiting the mPTP in yeast offers a promising strategy to protect tissues from perfusion damage.
Area of Science:
- Cell Biology
- Biochemistry
- Pathophysiology
Background:
- Ischemia-reperfusion injury causes significant clinical complications due to apoptotic cell death.
- Mitochondria play a critical role in initiating apoptosis following ischemia-reperfusion.
- The opening of the mitochondrial permeability transition pore (mPTP) is a key event in this process.
Purpose of the Study:
- To elucidate the intracellular mechanisms of apoptosis during ischemia-reperfusion.
- To investigate the role of the yeast Saccharomyces cerevisiae as a model system for studying apoptosis.
- To explore the potential of pharmacological mPTP inhibition as a cytoprotective strategy.
Main Methods:
- Utilizing yeast (Saccharomyces cerevisiae) as a model organism to study cellular apoptosis.
- Analyzing the role of mitochondrial dysfunction, including reactive oxygen species (ROS) production and ATP hydrolysis.
- Examining the function of the yeast permeability transition pore (yPTP) and its similarity to the mammalian mPTP.
Main Results:
- Ischemia-reperfusion leads to unregulated mPTP opening, causing ion flux and release of apoptotic mediators.
- Increased reactive oxygen species (ROS) and uncoupled oxidative phosphorylation contribute to cell death.
- The yeast pore (yPTP) shares functional similarities with the mammalian mPTP, responding to oxidative stress.
Conclusions:
- The mPTP is a central mediator of cell death in ischemia-reperfusion injury.
- Yeast serves as a valuable model for understanding mPTP-mediated apoptosis and testing cytoprotective agents.
- Pharmacological inhibition of the mPTP presents a promising therapeutic avenue for mitigating ischemia-reperfusion damage.
Related Concept Videos
01:45Mitochondrial 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,...
01:45Mitochondrial 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,...
01:28The 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...