The participation of pyridine nucleotides redox state and reactive oxygen in the fatty acid-induced permeability transition in rat liver mitochondria

FEBS Letters ◽  
1999 ◽  
Vol 464 (1-2) ◽  
pp. 97-101 ◽  
Author(s):  
Rosana Catisti ◽  
Anibal E Vercesi
Keyword(s):  
Fatty Acid ◽  
Rat Liver ◽  
Redox State ◽  
Reactive Oxygen ◽  
Permeability Transition ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Pyridine Nucleotides

scholarly journals ‘Pore’ formation is not required for the hydroperoxide-induced Ca2+ release from rat liver mitochondria

1992 ◽  
Vol 285 (1) ◽  
pp. 65-69 ◽  
Author(s):  
J Schlegel ◽  
M Schweizer ◽  
C Richter
Keyword(s):  
Rat Liver ◽  
Pore Formation ◽  
Permeability Transition Pore ◽  
Permeability Transition ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Inner Membrane ◽  
Mitochondrial Inner Membrane ◽  
Specific Permeability ◽  
Specific Pathway

It has recently been suggested by several investigators that the hydroperoxide- and phosphate-induced Ca2+ release from mitochondria occurs through a non-specific ‘pore’ formed in the mitochondrial inner membrane. The aim of the present study was to investigate whether ‘pore’ formation actually is required for Ca2+ release. We find that the t-butyl hydroperoxide (tbh)-induced release is not accompanied by stimulation of sucrose entry into, K+ release from, and swelling of mitochondria provided re-uptake of the released Ca2+ (‘Ca2+ cycling’) is prevented. We conclude that (i) the tbh-induced Ca2+ release from rat liver mitochondria does not require ‘pore’ formation in the mitochondrial inner membrane, (ii) this release occurs via a specific pathway from intact mitochondria, and (iii) a non-specific permeability transition (‘pore’ formation) is likely to be secondary to Ca2+ cycling by mitochondria.

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