Cited by 734Liver Disease Diagnosis and TreatmentMitochondrial Function and PathologyMetabolism and Genetic Disorders

Defective hepatic mitochondrial respiratory chain in patients with nonalcoholic steatohepatitis.

Open access
Pérez-Carreras, Mercedes, Del Hoyo, Pilar, Martín, Miguel A., Rubio, Juan C., Martín, Ana, Castellano, Gregorio, Colina, Francisco, Arenas, Joaquín +1 more·2003·Hepatology

Abstract

Mitochondrial dysfunction might play a central role in the pathogenesis of nonalcoholic steatohepatitis (NASH). The aims of this study were to evaluate whether free fatty acid (FFA) transport into the mitochondria or the activity of mitochondria respiratory chain (MRC) complexes are impaired in NASH. In patients with NASH and control subjects, we measured free carnitine, short-chain acylcarnitine (SCAC) and long-chain acylcarnitine (LCAC) esters, carnitine palmitoyltransferase (CPT) activity, and MRC enzyme activity in liver tissue as well as serum concentration of tumor necrosis factor alpha (TNF-alpha), homeostatic metabolic assessment of insulin resistance (HOMA(IR)), and body mass index (BMI). In patients with NASH, the LCAC/free carnitine ratio was significantly increased and the SCAC/free carnitine ratio was decreased. In patients with NASH, the activity of the MRC complexes was decreased to 63% +/- 20% (complex I), 58.5% +/- 16.7% (complex II), 70.6% +/- 10.3% (complex III), 62.5% +/- 13% (complex IV), and 42.4% +/- 9.1% (adenosine triphosphate synthase) of the corresponding control values. Activity of these complexes correlated significantly with serum TNF-alpha and HOMA(IR). Serum TNF-alpha (36.3 +/- 23.1 pg/mL), HOMA(IR) (4.5 +/- 2.38), and BMI (29.9 +/- 3.5 kg/m(2)) values were significantly increased in patients with NASH. In conclusion, activities of MRC complexes were decreased in liver tissue of patients with NASH. This dysfunction correlated with serum TNF-alpha, insulin resistance, and BMI values.

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Registry

Crossref · 10.1002/hep.1840380426

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49 of 49 references verified0 citation errors · 0 not checkable

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  • People with NAFLD have decreased electron transport chain complex activity.

    “Patients with NAFLD present with decreased ETC complex activity153,154 and a fatty liver-associated decrease in SIRT3 activity, which leads to hyperacetylation of mitochondrial proteins and mitochondrial dysfunction155.”
  • Enzymatic activity of complexes I-V is reduced in liver extracts from patients with NASH and is inversely correlated with BMI and HOMA-IR.

    “Indeed, enzymatic activity of complexes I-V is reduced in liver extracts from patients with NASH and is inversely correlated with BMI and HOMA-IR (233, 234).”

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Authors
Pérez-Carreras, M., Del Hoyo, P., Martín, M. A., Rubio, J. C., Martín, A., Castellano, G., Colina, F., Arenas, J., & Solis-Herruzo, J. A.
Corresponding author
Pérez-Carreras, Mercedes
Venue
Hepatology
Published
2003-10
Volume
38
Issue
4
Pages
999-1007
ISSN
0270-9139 (ISSN-L)
OpenAlex
W2084382398
Cited by
734
References
49
Citations by year
2026: 13 · 2025: 28 · 2024: 39 · 2023: 43 · 2022: 42 · 2021: 38 · 2020: 40 · 2019: 36 · 2018: 40 · 2017: 35 · 2016: 38 · 2015: 32 · 2014: 36 · 2013: 21 · 2012: 37
FWCI
13.56
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
Keywords
nonalcoholic steatohepatitis, mitochondrial respiratory chain, mitochondrial dysfunction, free fatty acid transport, acylcarnitines, free carnitine, carnitine palmitoyltransferase, TNF-α, insulin resistance, obesity, liver mitochondria
MeSH terms
Adult, Carnitine, Electron Transport, Fatty Acids, Fatty Liver, Female, Humans, Insulin Resistance, Male, Middle Aged, Mitochondria, Liver, Oxidation-Reduction, Body Mass Index, Reactive Oxygen Species

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