- Tytuł:
- Basic energetic parameters of Acanthamoeba castellanii mitochondria and their resistance to oxidative stress
- Autorzy:
-
Jarmuszkiewicz, Wieslawa
Antos-Krzeminska, Nina
Drachal-Chrul, Danuta
Matkovic, Karolina
Nobik, Wioletta
Pieńkowska, Joanna
Swida, Aleksandra
Woyda-Ploszczyca, Andrzej
Budzinska, Malgorzata - Powiązania:
- https://bibliotekanauki.pl/articles/1040753.pdf
- Data publikacji:
- 2008
- Wydawca:
- Polskie Towarzystwo Biochemiczne
- Tematy:
-
Acanthamoeba castellanii
mitochondria
hydrogen peroxide
oxidative stress - Opis:
- The purpose of this study was establishing the basic energetic parameters of amoeba Acanthamoeba castellanii mitochondria respiring with malate and their response to oxidative stress caused by hydrogen peroxide in the presence of Fe2+ ions. It appeared that, contrary to a previous report (Trocha LK, Stobienia O (2007) Acta Biochim Polon 54: 797), H2O2-treated mitochondria of A. castellanii did not display any substantial impairment. No marked changes in cytochrome pathway activity were found, as in the presence of an inhibitor of alternative oxidase no effects were observed on the rates of uncoupled and phosphorylating respiration and on coupling parameters. Only in the absence of the alternative oxidase inhibitor, non-phosphorylating respiration progressively decreased with increasing concentration of H2O2, while the coupling parameters (respiratory control ratio and ADP/O ratio) slightly improved, which may indicate some inactivation of the alternative oxidase. Moreover, our results show no change in membrane potential, Ca2+ uptake and accumulation ability, mitochondrial outer membrane integrity and cytochrome c release for 0.5-25 mM H2O2-treated versus control (H2O2-untreated) mitochondria. These results indicate that short (5 min) incubation of A. castellanii mitochondria with H2O2 in the presence of Fe2+ does not damage their basic energetics.
- Źródło:
-
Acta Biochimica Polonica; 2008, 55, 2; 349-356
0001-527X - Pojawia się w:
- Acta Biochimica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł