Antioxidant, antimicrobial and neutrophil-modulating activities of herb extracts.

  • Petko Denev Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Laboratory of Biologicaly Active Substances, Plovdiv, Bulgaria.;
  • Maria Kratchanova Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Laboratory of Biologicaly Active Substances, Plovdiv, Bulgaria.;
  • Milan Ciz Institute of Biophysics of the AS CR, Brno, Czech Republic.;
  • Antonin Lojek Institute of Biophysics of the AS CR, Brno, Czech Republic.;
  • Ondrej Vasicek Institute of Biophysics of the AS CR, Brno, Czech Republic.;
  • Denitsa Blazheva University of Food Technologies, Plovdiv, Bulgaria.;
  • Plamena Nedelcheva University of Food Technologies, Plovdiv, Bulgaria.;
  • Libor Vojtek Department of Animal Physiology and Immunology, Institute of Experimental Biology, Masaryk University, Brno, Czech Republic.;
  • Pavel Hyrsl Department of Animal Physiology and Immunology, Institute of Experimental Biology, Masaryk University, Brno, Czech Republic.;
DOI: https://doi.org/10.18388/abp.2014_1907

Abstract

The present study provides a comprehensive data on the antioxidant, antimicrobial and neutrophil-modulating activities of extracts from six medicinal plants--blackberry (Rubus fruticosus) leaves, chokeberry (Aronia melanocarpa) leaves, hawthorn (Crataegus monogyna) leaves, lady's mantle (Alchemilla glabra) aerial parts, meadowsweet (Filipendula ulmaria) aerial parts and raspberry (Rubus idaeus) leaves. In order to analyze the antioxidant activity of the herbs, several methods (ORAC, TRAP, HORAC and inhibition of lipid peroxidation) were used. Blackberry leaves and meadowsweet extracts revealed the highest antioxidant activities via all methods. All extracts studied blocked almost completely the opsonized zymosan particle-activated ROS production by neutrophils from human whole blood. On the other hand, the effect of extracts on phorbol myristate acetate-activated ROS production was much milder and even nonsignificant in the case of chokeberry leaves. This latter result suggests that extracts (apart from their antioxidative activity) interfere with the signaling cascade of phagocyte activation upstream of the protein kinase C activation. The antimicrobial activity of the investigated extracts against 11 human pathogens was investigated using three different methods. Meadowsweet and blackberry leaves extracts had the highest antimicrobial effect and the lowest minimal inhibiting concentrations (MICs) against the microorganisms tested.
Published
2014-06-18
Issue
Vol. 61 No. 2 (2014)
Section
Articles

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