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Quantification of Myocardial Mitochondrial Membrane Potential Using PET
Current Cardiology Reports, 2021To present a method enabling in vivo quantification of tissue membrane potential (ΔΨT), a proxy of mitochondrial membrane potential (ΔΨm), to review the origin and role of ΔΨm, and to highlight potential applications of myocardial ΔΨT imaging.Radiolabelled lipophilic cations have been used for decades to measure ΔΨm in vitro.
Matthieu, Pelletier-Galarneau +6 more
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Mitochondrial membrane potential (MMP) regulates sperm motility
In Vitro Cellular & Developmental Biology - Animal, 2016Sperm motility is the major decisive factor in determining male fertility. The objective of the present study was to analyse the effect of mitochondrial membrane potential (MMP) on the temporal regulation of sperm motility. Observations were recorded in various rodent species and among differentially motile sperm fractions including swim up and ...
Saurabh Kumar, Agnihotri +6 more
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Protein unfolding by the mitochondrial membrane potential
Nature Structural Biology, 2002Mitochondria can unfold importing precursor proteins by unraveling them from their N-termini. However, how this unraveling is induced is not known. Two candidates for the unfolding activity are the electrical potential across the inner mitochondrial membrane and mitochondrial Hsp70 in the matrix.
Shihai, Huang +2 more
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Membrane Potential of Mitochondrial Measured with Microelectrodes
Science, 1977The membrane potentials of giant mitochondria from cuprizone-fed mice were found to be independent of metabolic state. Experiments are described in which the presence of the microelectrodes in the inner mitochondrial space, and the metabolic viability of the impaled mitochonidra, are validated.
B L, Maloff, S P, Scordilis, H, Tedeschi
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Preservation of Mitochondrial Membrane Potential During Anoxia
1996Mitochondria (Mt) in living cells can be intensely and selectively stained against a dark cytoplasmic background by several fluorescent cationic dyes. For example, the incorporation of Rhodamine 123 (RH123) into Mt depends on the membrane potential, accompanied by red shifts of absorption spectra and quenching of fluorescence intensity (Emaus et al ...
Y, Nomura, T, Miyao, M, Tamura
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The plasma membrane and mitochondrial membrane potentials of Plasmodium yoelii
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 19881. The plasma membrane potential and the mitochondrial membrane potential of P. yoellii was examined by fluorescence microscopy using rhodamine 123 and by transmembrane distribution of tetraphenylphosphonium. 2. The mitochondrion of P. yoelii, free of gametocyte stage, maintained a high negative inside membrane potential. 3.
A, Izumo, K, Tanabe, M, Kato
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Mitochondrial membrane potential and ischemic neuronal death
Neuroscience Research, 2006Mitochondria are intracellular organelles in which high energy phosphate is produced. Ischemia causes depletion of the materials necessary to produce this phosphate and strongly affects the electron transport chain. Apoptosis commences during and after ischemia.
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Relation Between Mitochondrial Membrane Potential and ROS Formation
2011Mitochondria are considered the main source of reactive oxygen species (ROS) in the cell. For this reason they have been recognized as a source of various pathological conditions as well as aging. Chronic increase in the rate of ROS production is responsible for the accumulation of ROS-associated damages in DNA, proteins, and lipids and may result in ...
Suski JM +5 more
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Mitochondrial membrane potential and ageing in Podospora anserina
Mechanisms of Ageing and Development, 2001Some filamentous fungi exhibit a limited vegetative growth with modifications in the mitochondria, suggesting the involvement of mitochondria in the process of ageing. Nevertheless, the relationship between the ability to grow or the fate of these cells relative to their mitochondrial membrane potential (Psi(mt)) level has not been investigated.
F, Koll +3 more
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Visualization of mitochondrial membrane potential in mammalian cells
2020Assessment of the mitochondrial membrane potential (Δψ) in living cells, although not trivial, can be used to estimate mitochondrial bioenergetic state. For this purpose, fluorescent lipophilic cations are broadly applied. These cations enter cells and accumulate primarily in the mitochondrial matrix in a Δψ-dependent manner.
Esteras, N. +4 more
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