Effects of yeast hydrolysate on hepatic lipid metabolism in high-fat-diet-induced obese mice: Yeast hydrolysate suppresses body fat accumulation by attenuating fatty acid synthesis

Eun Young Jung, Yang Hee Hong, Jae Hwan Kim, Yooheon Park, Song Hwan Bae, Un Jae Chang, Hyung Joo Suh

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Aims: We observed whether the anti-obesity activity of yeast hydrolysate (YH) was due to the alteration of lipid-regulating enzyme activities. Methods: Male ICR mice were divided into four groups: a normal diet group (ND; 4.2% fat), a high-fat diet group (HF; 27.7% fat), an HF group treated orally with 0.5% or 1% YH in the drinking water (HF+YH0.5; 27.7% fat and HF+YH1; 27.7% fat). Results: After 5 weeks, the YH groups (HF+YH0.5 = 3.92 ± 0.17 g/100 g BW and HF+YH1 = 3.76 ± 0.13 g/100 g BW) had significantly lower levels of epididymal fats compared to the HF group (4.91 ± 0.29 g/100 g BW; p < 0.05). YH supplementation produced a decrease in serum triglycerides and low-density lipoprotein cholesterol concentrations and body weight gain, and produced a dose-dependent significant increase in serum ghrelin compared with the HF group (p < 0.05). Hepatic glucose-6-phosphate dehydrogenase (G6PD) activity was inhibited by YH supplementation compared with the HF group, and mice treated orally with 1% YH exhibited a significant decrease in hepatic malic enzyme (ME) activity compared to obese mice treated with the vehicle (HF = 10.44 ± 2.74 nmol/min/mg protein vs. HF+YH1 = 6.68 ± 2.23 nmol/min/mg protein; p < 0.05). Conclusions: YH supplementation suppressed body fat accumulation by attenuating fatty acid synthesis through the downregulation of hepatic G6PD and ME activities.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalAnnals of Nutrition and Metabolism
Volume61
Issue number2
DOIs
Publication statusPublished - 2012 Oct

Keywords

  • Epididymal fat
  • Ghrelin
  • Glucose-6-phosphate dehydrogenase
  • Malic enzyme
  • Yeast hydrolysate

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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