Abstract:
:Leaves of Ligustrum vulgare (common privet) have been used for treatment of oropharyngeal inflammations or as antirheumatic, diuretic, and hypotensive agents in folk medicine in southern Europe. Taking into account that neutrophils are involved in the inflammation, the aim of the study was to determine the effect of an aqueous extract prepared from leaves of Ligustrum vulgare on neutrophil functions. The extract was characterized by the HPLC-DAD-MSn method. The inhibition of reactive oxygen species production by formyl-met-leu-phenylalanine- or phorbol 12-myristate 13-acetate-stimulated neutrophils was determined using luminol- or lucigenin-dependent chemiluminescence. The effect on myeloperoxidase, metalloproteinase 9, and interleukin 8 production by neutrophils was measured by an enzyme-linked immunosorbent assay. Neutrophil elastase release was established spectrophotometrically. The expression of adhesion molecules on neutrophils was analyzed with flow cytometry. The main compounds detected were flavonoids, phenylpropanoids, hydroxycinnamates, and secoiridoids. The inhibition of oxidative burst by the extract was comparable in both stimuli models (formyl-met-leu-phenylalanine: IC50 = 18.2 ± 4.0 µg/mL; phorbol 12-myristate 13-acetate: IC50 = 19.8 ± 3.0 µg/mL). The extract in the concentration range of 5-50 µg/mL inhibited neutrophil elastase release by 23.9-34.1 % and myeloperoxidase release by 24.2-37.4 %. The inhibitory effect on metalloproteinase 9 and interleukin 8 production was around 20 %. The extract in the highest concentration modulated the expression of L-selectin and β2 integrin. Our results partly support the traditional use of common privet leaves as an anti-inflammatory agent.
journal_name
Planta Medjournal_title
Planta medicaauthors
Czerwińska ME,Granica S,Kiss AKdoi
10.1055/s-0032-1328718subject
Has Abstractpub_date
2013-07-01 00:00:00pages
924-32issue
11eissn
0032-0943issn
1439-0221journal_volume
79pub_type
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