ArticleJournal of bioenergetics and biomembranes2003
The composition of the incubation medium influences the sensitivity of mitochondrial permeability transition to cyclosporin A.
Article in Journal of bioenergetics and biomembranes, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
2 citing papers in PubMed, 7 citations in OpenAlex.
- Cardiotoxicity of acetogenins from Persea americana occurs through the mitochondrial permeability transition pore and caspase-dependent apoptosis pathways.Journal of bioenergetics and biomembranes · 2012Article
- The oxygen free radicals originating from mitochondrial complex I contribute to oxidative brain injury following hypoxia-ischemia in neonatal mice.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2012Article
Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The aim of this work was to study permeability transition, and the influence of the composition of the incubation medium, on the inhibitory action of cyclosporin A. It was found that cyclosporin inhibited the opening of a nonspecific pore, as induced by the uncoupler carbonyl cyanide m-chlorophenylhydrazone, provided K+ was present in the incubation medium, but failed to do so if mitochondria are incubated in sucrose or Na+-based medium. It was also found that the sensitivity of mitochondria to the uncoupler depended on the incubation mixture, being more sensitive when sucrose was the osmotic support. Matrix Ca2+ release, large amplitude swelling, and drop in transmembrane electric gradient revealed permeability transition. The titration of membrane thiol groups shows them to be increased in mitochondria incubated in sucrose medium, in comparison with the values found in mitochondria incubated in KCl or NaCl medium. Our proposal is that the incubation in sucrose medium propitiated a conformational change of membrane proteins in such a way that cyclosporin was unable to bind to its target site.
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Registered trials
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