Construction of blackberry polysaccharide nano-selenium particles: Structure features and regulation effects of glucose/lipid metabolism in HepG2 cells

Food Res Int. 2024 Jul:187:114428. doi: 10.1016/j.foodres.2024.114428. Epub 2024 Apr 25.

Abstract

In this study, blackberry polysaccharide-selenium nanoparticles (BBP-24-3Se) were first prepared via Na2SeO3/Vc redox reaction, followed by coating with red blood cell membrane (RBC) to form core-shell structure polysaccharide-selenium nanoparticles (RBC@BBP-24-3Se). The particle size of BBP-24-3Se (167.1 nm) was increased to 239.8 nm (RBC@BBP-24-3Se) with an obvious core-shell structure after coating with RBC. FT-IR and XPS results indicated that the interaction between BBP-24-3 and SeNPs formed a new C-O···Se bond with valence state of Se0. Bioassays indicated that RBC coating markedly enhanced both the biocompatibility and bioabsorbability of RBC@BBP-24-3Se, and the absorption rate of RBC@BBP-24-3Se in HepG2 cells was 4.99 times higher than that of BBP-24-3Se at a concentration of 10 μg/mL. Compared with BBP-24-3Se, RBC@BBP-24-3Se possessed significantly heightened protective efficacy against oxidative damage and better regulation of glucose/lipid metabolism disorder induced by palmitic acid in HepG2 cells. Mechanistic studies demonstrated that RBC@BBP-24-3Se could effectively improve PI3K/AKT signaling pathway to promote glucose metabolism, inhibit the expression of lipid synthesis genes and up-regulate the expression of lipid-decomposing genes through AMPK signaling pathway to improve lipid metabolism. These results provided a theoretical basis for developing a new type of selenium supplement for the treatment of insulin resistance.

Keywords: Blackberry polysaccharides; Core-shell structure; Glucose/lipid metabolism; Nano-selenium particles.

MeSH terms

  • Antioxidants / pharmacology
  • Glucose* / metabolism
  • Hep G2 Cells
  • Humans
  • Lipid Metabolism* / drug effects
  • Nanoparticles* / chemistry
  • Oxidative Stress / drug effects
  • Particle Size
  • Polysaccharides* / chemistry
  • Polysaccharides* / pharmacology
  • Rubus* / chemistry
  • Selenium* / chemistry
  • Signal Transduction / drug effects