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  • 2020-2022  (2)
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  • 1
    Publication Date: 2021-04-16
    Description: Oxidative stress is involved in the pathophysiology of nonalcoholic fatty liver disease (NAFLD). However, reliable biomarkers of NAFLD in relation to oxidative stress are not available. While paraoxonase 1 (PON1) is an antioxidant biomarker, there appears to be mixed data on PON-1 in patients with NAFLD. The aim of this meta-analysis was to assess the current data on PON1 activity (i.e., paraoxonase and arylesterase) in patients with NAFLD. A PubMed, CENTRAL, and Embase search identified 12 eligible articles. In the meta-analysis, the paraoxonase activity was low in patients with NAFLD (mean difference (MD) −27.17 U/L; 95% confidence interval (CI) −37.31 to −17.03). No difference was noted in the arylesterase activity (MD 2.45 U/L; 95% CI −39.83 to 44.74). In a subgroup analysis, the paraoxonase activity was low in biopsy-proven nonalcoholic steatohepatitis (MD −92.11 U/L; 95% CI −115.11 to −69.11), while the activity in NAFLD as diagnosed by ultrasonography or laboratory data was similar (MD −2.91 U/L; 95% CI −11.63 to 5.80) to that of non-NAFLD. In summary, the PON1, especially paraoxonase, activity could be a useful biomarker of NAFLD. Further studies are warranted to ascertain the relevance of PON1 measurements in patients with NAFLD.
    Electronic ISSN: 1420-3049
    Topics: Chemistry and Pharmacology
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  • 2
    Publication Date: 2021-02-04
    Description: Patients with nonalcoholic fatty liver disease (NAFLD) show dyslipidemia and a high risk for coronary heart disease (CHD). However, conventional atherosclerotic lipids are found at low levels in NAFLD patients with advanced fibrosis, in whom the risk for CHD is extremely high. The aim of the present study was to evaluate the levels of oxidized high-density lipoprotein (oxHDL), an emerging atherosclerotic biomarker, in patients with NAFLD. A total of 32 non-NAFLD subjects and 106 patients with NAFLD were enrolled. The fibrosis grades were stratified using non-invasive methods, including the Fibrosis-4 index and NAFLD fibrosis score. Total cholesterol and low-density lipoprotein (LDL)-cholesterol levels were significantly low in patients with advanced liver fibrosis. In contrast, oxHDL levels were high in NAFLD patients and showed a stepwise increase as fibrosis progressed. These oxHDL levels were independent of the HDL cholesterol levels, and statin use did not influence the oxHDL levels. Obese patients showed no increase in oxHDL levels, whereas patients with a low handgrip strength showed high oxHDL levels in NAFLD with advanced fibrosis. In conclusion, oxHDL is a potential biomarker for assessing the status of patients with NAFLD, including CHD and metabolic/nutritional disturbance, and particular cases with advanced liver fibrosis.
    Electronic ISSN: 2076-3921
    Topics: Chemistry and Pharmacology
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