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Reciprocal association of serum Mac-2 binding protein and HDL-cholesterol concentrations
Hiromi Uekita1, Hiroyasu Yamamoto2, Ryu Niinaga2
1Department of Biomedical Informatics, Division of Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan; Department of Medical Technology, Faculty of Health Sciences, Kansai University of Health Sciences, Osaka, Japan.
Background:
Mac-2 binding protein (Mac-2BP) is used as a serum biomarker of nonalcoholic steatohepatitis, considered to be a liver phenotype of metabolic syndrome (MetS). In this study, we investigated the serum Mac-2BP concentrations-correlated MetS-related clinical parameters in vivo, and the underlying mechanism in vitro.
Materials & Methods:
We enrolled 54 healthy Japanese men who underwent health examination at Osaka University Health Care Center in this study. Physical and serum biochemical parameters were obtained from all the subjects. In the cultured HepG2 cells, the effects of interferon (IFN)-γ on the expression of Mac-2BP, apolipoprotein (apo) A-I, and ATP binding cassette transporter A1 (ABCA1) were studied.
Results:
Serum Mac-2BP concentrations correlated negatively with HDL-C, and positively with body mass index and systolic blood pressure in univariate analysis. These results suggested the association between Mac-2BP and MetS, although none of these 3 parameters had significant correlation with serum Mac-2BP concentrations in multivariate analysis. In HepG2 cells, IFN-γ stimulation resulted in the increased Mac-2BP and the decreased ABCA1 and apo A-I mRNA concentrations, while Mac-2BP had no effects on ABCA1 and apo A-I concentrations.
Conclusions:
The serum Mac-2BP concentrations are negatively correlated with HDL-C concentrations in healthy subjects, as a result of chronic inflammation.
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