Uncoupling of mitochondrial oxidative phosphorylation by hexetidine.

Abstract:

:To gain further insight into the biochemical properties of the antibacterial hexetidine, isolated rat liver mitochondria were added with this drug and investigation made of certain features related to mitochondrial bioenergetics. Hexetidine was found to cause oxidation of intramitochondrial pyridine nucleotides and stimulate the rate of oxygen uptake caused by respiratory substrates involving three, two and one site(s) of phosphorylation. Reversal of oxygen uptake inhibition by oligomycin was also determined. By investigating hexetidine effect on oxidative phosphorylation, hexetidine was found both to inhibit the rate of ATP synthesis and to cause ATP hydrolysis. Likewise, hexetidine capability to produce acidification of extramitochondrial medium and to collapse delta psi was also observed. The reported findings show that hexetidine exhibits uncoupling properties.

authors

D'Arcangelo G,Barile M,Passarella S,Quagliariello E

doi

10.1016/0006-291x(87)91001-1

subject

Has Abstract

pub_date

1987-09-15 00:00:00

pages

801-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(87)91001-1

journal_volume

147

pub_type

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