Effect of ultra-high pressure pretreatment on the phenolic profiles, antioxidative activity and cytoprotective capacity of different phenolic fractions from Que Zui tea

Food Chem. 2023 May 30:409:135271. doi: 10.1016/j.foodchem.2022.135271. Epub 2022 Dec 23.

Abstract

This study aims to explore whether ultra-high pressure (UHP) pre-treatment strengthened the bioaccessibility and bioactivities of the free (QF), esterified (QE) and insoluble-bound phenolics (QIB) from Que Zui tea (QT). The results revealed that the extraction yields, the total phenolic (TPC) and total flavonoid contents (TFC) of three phenolic fractions from QT were markedly increased after ultra-high pressure (UHP) processing (p < 0.05). A total of 19 and 20 compounds were characterized and quantified in non- and UHP-treated QT, respectively, including the content of 6'-O-caffeoylarbutin (11775.68 and 13248.87 μg/g of dry extract) was highest in QF, the content of caffeic acid was highest in QE (2131.58 and 7362.99 μg/g of dry extract) and QIB (9151.89 and 10930.82 μg/g of dry extract). QF, QE and QIB from QT after UHP processing had better antioxidant, ROS scavenging, and anti-apoptosis effects. The possible mechanism of cytoprotective effect was related to Keap1-Nrf2 pathway.

Keywords: 1,4-Fihydroxy-2-naphthoic acid (PubChem CID: 671); 2,4-Dihydroxybenzoic acid (PubChem CID: 1491); 6-O- Caffeoyl-d-glucopyranose (PubChem CID: 10427456); 6′-O-Caffeoylarbutin (PubChem CID: 15689808); Antioxidant activity; Arbutin (PubChem CID: 440936); Azelaic acid (PubChem CID: 2266); Caffeic acid (PubChem CID: 689043); Chlorogenic acid (PubChem CID: 1794427); Cytoprotective effect; Dunalianoside E (PubChem CID: 72737667); Kaempferol-3-O-β-d-glucoside (PubChem CID: 25203515); Methyl chlorogenic acid (PubChem CID: 6476139); Que Zui tea; Quercetin (PubChem CID: 5280343); Quinic acid (PubChem CID: 6508); Robustaside A (CAS Registry Number 148810–39-3); Rosmarinate (PubChem CID: 639655); Sebacic acid (PubChem CID: 5192); UHPLC-ESI-HR-MS/MS; Ultra-high pressure; Vanillin isobutyrate (PubChem CID: 539829); p-Coumaric acid (PubChem CID: 637542); p-Coumaroyl quinic acid (PubChem CID: 6441280); p-Hydroxy benzoic acid (PubChem CID: 135).

MeSH terms

  • Antioxidants* / analysis
  • Antioxidants* / pharmacology
  • Chromatography, High Pressure Liquid / methods
  • Kelch-Like ECH-Associated Protein 1
  • NF-E2-Related Factor 2*
  • Phenols / analysis
  • Phenols / pharmacology
  • Plant Extracts / pharmacology
  • Tea

Substances

  • Antioxidants
  • Kelch-Like ECH-Associated Protein 1
  • NF-E2-Related Factor 2
  • Phenols
  • Plant Extracts
  • Tea