Mitochondrial oxidative injury energy metabolism alteration in rat fatty liver: Effect of the nutritional status

G. Vendemiale, I. Grattagliano, P. Caraceni, G. Caraccio, M. Domenicali, M. Dall'Agata, F. Trevisani, F. Guerrieri, M. Bernardi, E. Altomare

Research output: Contribution to journalArticle

128 Citations (Scopus)

Abstract

Hepatic steatosis is associated with mitochondrial oxidative alterations. This study aimed to characterize in a choline-deficient model of rat fatty liver whether this oxidative imbalance is related to an impairment of the capacity of ATP synthesis both under fed conditions and after starvation, which may sensitize mitochondria to oxidative injury. Mitochondria were isolated from normal and fatty livers of fed or 18-hour fasted rats. Oxidative injury was evaluated by measuring the mitochondrial content of thiobarbituric reactive substances, protein carbonyls, glutathione, and protein sulfhydryls. The mitochondrial F0F1-ATP synthase content, tissue ATP concentration, and liver histology were also determined. Compared with normal liver, under fed conditions, fatty livers showed a greater mitochondrial content of oxidized lipids and proteins together with a low concentration of sulfhydryls and glutathione. The mitochondrial catalytic β-F1 subunit of the F0F1-ATP synthase was about 35% lower in fatty livers. Hepatic ATP was also significantly reduced in fatty liver. Starvation exacerbated mitochondrial oxidative injury in both groups but to a greater extent in fatty livers. In the steatotic group, fasting induced a significant decrease of the ATP levels, which was accompanied by a 70% fall of the catalytic β-F1 subunit. These data indicate that the mitochondrial oxidative alterations in fatty livers are associated with an important reduction of the F0F1-ATP synthase. These changes, which are greatly exacerbated after starvation, may account for the reduced synthesis of the hepatic ATP observed in the presence of fatty infiltration.

Original languageEnglish
Pages (from-to)808-815
Number of pages8
JournalHepatology
Volume33
Issue number4
DOIs
Publication statusPublished - 2001

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Fatty Liver
Nutritional Status
Energy Metabolism
Adenosine Triphosphate
Wounds and Injuries
Starvation
Liver
Glutathione
Catalytic Domain
Mitochondria
Mitochondrial Proton-Translocating ATPases
Proteins
Choline
Fasting
Histology
Lipids

ASJC Scopus subject areas

  • Hepatology

Cite this

Vendemiale, G., Grattagliano, I., Caraceni, P., Caraccio, G., Domenicali, M., Dall'Agata, M., ... Altomare, E. (2001). Mitochondrial oxidative injury energy metabolism alteration in rat fatty liver: Effect of the nutritional status. Hepatology, 33(4), 808-815. https://doi.org/10.1053/jhep.2001.23060

Mitochondrial oxidative injury energy metabolism alteration in rat fatty liver : Effect of the nutritional status. / Vendemiale, G.; Grattagliano, I.; Caraceni, P.; Caraccio, G.; Domenicali, M.; Dall'Agata, M.; Trevisani, F.; Guerrieri, F.; Bernardi, M.; Altomare, E.

In: Hepatology, Vol. 33, No. 4, 2001, p. 808-815.

Research output: Contribution to journalArticle

Vendemiale, G, Grattagliano, I, Caraceni, P, Caraccio, G, Domenicali, M, Dall'Agata, M, Trevisani, F, Guerrieri, F, Bernardi, M & Altomare, E 2001, 'Mitochondrial oxidative injury energy metabolism alteration in rat fatty liver: Effect of the nutritional status', Hepatology, vol. 33, no. 4, pp. 808-815. https://doi.org/10.1053/jhep.2001.23060
Vendemiale, G. ; Grattagliano, I. ; Caraceni, P. ; Caraccio, G. ; Domenicali, M. ; Dall'Agata, M. ; Trevisani, F. ; Guerrieri, F. ; Bernardi, M. ; Altomare, E. / Mitochondrial oxidative injury energy metabolism alteration in rat fatty liver : Effect of the nutritional status. In: Hepatology. 2001 ; Vol. 33, No. 4. pp. 808-815.
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