Hyperforin blocks neutrophil activation of matrix metalloproteinase-9, motility and recruitment, and restrains inflammation-triggered angiogenesis and lung fibrosis

Isabella Dell'Aica, Raffaele Niero, Francesco Piazza, Anna Cabrelle, Luigi Sartor, Cristiano Colalto, Enrico Brunetta, Girieca Lorusso, Roberto Benelli, Adriana Albini, Fiorella Calabrese, Carlo Agostini, Spiridione Garbisa

Research output: Contribution to journalArticlepeer-review

Abstract

Hyperforin (Hyp), a polyphenol-derivative of St. John's wort (Hypericum perforatum), has emerged as key player not only in the antidepressant activity of the plant but also as an inhibitor of bacteria lymphocyte and tumor cell proliferation, and matrix proteinases. We tested whether as well as inhibiting leukocyte elastase (LE) activity, Hyp might be effective in containing both polymorphonuclear neutrophil (PMN) leukocyte recruitment and unfavorable eventual tissue responses. The results show that, without affecting in vitro human PMN viability and chemokine-receptor expression, Hyp (as stable dicyclohexylammonium salt) was able to inhibit in a dose-dependent manner their chemotaxis and chemoinvasion (IC50 = 1 μM for both); this effect was associated with a reduced expression of the adhesion molecule CD11b by formyl-Met-Leu-Phe-stimulated neutrophils and block of LE-triggered activation of the gelatinase matrix metalloproteinase-9. PMN-triggered angiogenesis is also blocked by both local injection and daily i.p. administration of the Hyp salt in an interleukin-8-induced murine model. Furthermore, i.p. treatment with Hyp reduces acute PMN recruitment and enhances resolution in a pulmonary bleomycin-induced inflammation model, significantly reducing consequent fibrosis. These results indicate that Hyp is a powerful anti-inflammatory compound with therapeutic potential, and they elucidate mechanistic keys.

Original languageEnglish
Pages (from-to)492-500
Number of pages9
JournalJournal of Pharmacology and Experimental Therapeutics
Volume321
Issue number2
DOIs
Publication statusPublished - May 2007

ASJC Scopus subject areas

  • Pharmacology

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