Format

Send to:

Choose Destination
See comment in PubMed Commons below
Biochem J. 1988 Oct 1;255(1):357-60.

Inhibition by cyclosporin A of a Ca2+-dependent pore in heart mitochondria activated by inorganic phosphate and oxidative stress.

Author information

  • 1Department of Biochemistry, University College London, U.K.

Abstract

The capacity of cyclosporin A to inhibit opening of a Ca2+-dependent pore in the inner membrane of heart mitochondria was investigated. Whereas in the presence of 25 nmol of Ca2+/mg of mitochondrial protein and 5 mM-Pi mitochondria were unable to maintain accumulated Ca2+, inner-membrane potential and sucrose impermeability, all three parameters were preserved when cyclosporin was included. Pore opening was assayed directly by [14C]sucrose entry and entrapment in the matrix space. [14C]Sucrose entry induced by both Ca2+ plus Pi and Ca2+ plus t-butyl hydroperoxide was almost completely inhibited by 60 pmol of cyclosporin/mg of mitochondrial protein. It is concluded that cyclosporin A is a potent inhibitor of the pore.

PMID:
3196322
[PubMed - indexed for MEDLINE]
PMCID:
PMC1135230
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Portland Press Icon for PubMed Central
    Loading ...
    Write to the Help Desk