Unravelling the Phytochemical Composition and the Pharmacological Properties of an Optimized Extract from the Fruit from Prunus mahaleb L.: From Traditional Liqueur Market to the Pharmacy Shelf

Molecules. 2021 Jul 22;26(15):4422. doi: 10.3390/molecules26154422.

Abstract

Prunus mahaleb L. fruit has long been used in the production of traditional liqueurs. The fruit also displayed scavenging and reducing activity, in vitro. The present study focused on unravelling peripheral and central protective effects, antimicrobial but also anti-COVID-19 properties exerted by the water extract of P. mahaleb. Anti-inflammatory effects were studied in isolated mouse colons exposed to lipopolysaccharide. Neuroprotection, measured as a blunting effect on hydrogen-peroxide-induced dopamine turnover, was investigated in hypothalamic HypoE22 cells. Antimicrobial effects were tested against different Gram+ and Gram- bacterial strains. Whereas anti-COVID-19 activity was studied in lung adenocarcinoma H1299 cells, where the gene expression of ACE2 and TMPRSS2 was measured after extract treatment. The bacteriostatic effects induced on Gram+ and Gram- strains, together with the inhibition of COX-2, TNFα, HIF1α, and VEGFA in the colon, suggest the potential of P. mahaleb water extract in contrasting the clinical symptoms related to ulcerative colitis. The inhibition of the hydrogen peroxide-induced DOPAC/DA ratio indicates promising neuroprotective effects. Finally, the downregulation of the gene expression of ACE2 and TMPRSS2 in H1299 cells, suggests the potential to inhibit SARS-CoV-2 virus entry in the human host. Overall, the results support the valorization of the local cultivation of P. mahaleb.

Keywords: Prunus mahaleb L.; anti-COVID-19 effects; anti-bacterial effects; chicoric acid; phenolic profile; protective effects.

MeSH terms

  • Angiotensin-Converting Enzyme 2 / metabolism
  • Animals
  • Anti-Bacterial Agents / chemistry
  • Anti-Bacterial Agents / pharmacology
  • Anti-Inflammatory Agents / chemistry
  • Anti-Inflammatory Agents / pharmacology
  • Antiviral Agents / chemistry
  • Antiviral Agents / pharmacology
  • Bacteria / drug effects*
  • COVID-19
  • Cell Line
  • Colitis, Ulcerative / drug therapy
  • Colon / drug effects*
  • Cytokines / genetics
  • Cytokines / metabolism
  • Dopamine / metabolism
  • Fruit / chemistry
  • Gene Expression Regulation / drug effects
  • HCT116 Cells
  • Humans
  • Inflammation / drug therapy
  • Male
  • Mice
  • Neuroprotection*
  • Plant Extracts / chemistry
  • Plant Extracts / pharmacology*
  • Prunus / chemistry
  • SARS-CoV-2 / drug effects*
  • Serine Endopeptidases / metabolism

Substances

  • Anti-Bacterial Agents
  • Anti-Inflammatory Agents
  • Antiviral Agents
  • Cytokines
  • Plant Extracts
  • ACE2 protein, human
  • Angiotensin-Converting Enzyme 2
  • Serine Endopeptidases
  • TMPRSS2 protein, human
  • Dopamine