Integrated metabolomic profiling for analysis of antilipidemic effects of Polygonatum kingianum extract on dyslipidemia in rats

World J Gastroenterol. 2018 Dec 28;24(48):5505-5524. doi: 10.3748/wjg.v24.i48.5505.

Abstract

Aim: To identify the effects and mechanism of action of Polygonatum kingianum (P. kingianum) on dyslipidemia in rats using an integrated untargeted metabolomic method.

Methods: A rat model of dyslipidemia was induced with a high-fat diet (HFD) and rats were given P. kingianum [4 g/(kg•d)] intragastrically for 14 wk. Changes in serum and hepatic lipid parameters were evaluated. Metabolites in serum, urine and liver samples were profiled using ultra-high performance liquid chromatography/mass spectrometry followed by multivariate statistical analysis to identify potential biomarkers and metabolic pathways.

Results: P. kingianum significantly inhibited the HFD-induced increase in total cholesterol and triglyceride in the liver and serum. P. kingianum also significantly regulated metabolites in the analyzed samples toward normal status. Nineteen, twenty-four and thirty-eight potential biomarkers were identified in serum, urine and liver samples, respectively. These biomarkers involved biosynthesis of phenylalanine, tyrosine, tryptophan, valine, leucine and isoleucine, along with metabolism of tryptophan, tyrosine, phenylalanine, starch, sucrose, glycerophospholipid, arachidonic acid, linoleic acid, nicotinate, nicotinamide and sphingolipid.

Conclusion: P. kingianum alleviates HFD-induced dyslipidemia by regulating many endogenous metabolites in serum, urine and liver samples. Collectively, our findings suggest that P. kingianum may be a promising lipid regulator to treat dyslipidemia and associated diseases.

Keywords: Dyslipidemia; Lipid regulation; Metabolomics; Multivariate statistical analysis; Polygonatum kingianum; Ultra-high performance liquid chromatography/mass spectrometry.

MeSH terms

  • Animals
  • Biomarkers / analysis
  • Chromatography, High Pressure Liquid
  • Diet, High-Fat / adverse effects
  • Disease Models, Animal
  • Dyslipidemias / drug therapy*
  • Dyslipidemias / etiology
  • Dyslipidemias / pathology
  • Humans
  • Lipid Metabolism / drug effects
  • Liver / drug effects
  • Liver / metabolism
  • Liver / pathology*
  • Male
  • Mass Spectrometry
  • Metabolic Networks and Pathways / drug effects
  • Metabolomics / methods
  • Plant Extracts / pharmacology
  • Plant Extracts / therapeutic use*
  • Polygonatum / chemistry*
  • Rats
  • Rats, Sprague-Dawley
  • Treatment Outcome

Substances

  • Biomarkers
  • Plant Extracts