Hydrophilic β-conglycinin peptide reduces hepatic triglyceride accumulation in obese model OLETF rats

Satoshi Wanezaki, Shintaro Saito, Nao Inoue, Nobuhiko Tachibana, Teruyoshi Yanagita, Koji Nagao

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We have previously demonstrated that soy β-conglycinin (βCG) peptide improves obesity and reduces lipid abnormalities in obese model Otsuka Long-Evans Tokushima fatty (OLETF) rats. In the present study, we fractionated βCG peptides by using hydrophobic synthetic absorbent materials and screened for peptide fractions with anti-obesity or hypolipidemic bioactivities. Wild-type Long-Evans Tokushima Otsuka (LETO group) and OLETF rats (control group) were provided a normal diet containing 20 % casein. We prepared hydrophobic and hydrophilic peptides from βCG and fed OLETF rats diets in which 5 % of the casein was replaced by either hydrophobic (the hydrophobic peptide group) or hydrophilic (the hydrophilic peptide group) peptides. After four weeks, hepatic triglyceride levels were lower in OLETF rats of the hydrophilic peptide group than in those of the control group due to decreased activity of hepatic fatty acid synthase, caused by the consumption of hydrophilic peptides. Although anti-obesity activity was not found in either βCG peptide fraction, the hydrophilic fraction of the βCG peptide could be a candidate for the identification of new peptide sequences that suppress hepatic lipid synthesis.

    Original languageEnglish
    Pages (from-to)797-803
    Number of pages7
    JournalFood Science and Technology Research
    Volume26
    Issue number6
    DOIs
    Publication statusPublished - 2020

    Keywords

    • Hydrophilic peptide
    • Lipogenesis
    • Obese OLETF rat
    • Soy β-conglycinin

    ASJC Scopus subject areas

    • Biotechnology
    • Food Science
    • Chemical Engineering(all)
    • Industrial and Manufacturing Engineering
    • Marketing

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