Corilagin is a potent inhibitor of NF-kappaB activity and downregulates TNF-alpha induced expression of IL-8 gene in cystic fibrosis IB3-1 cells

Roberto Gambari, Monica Borgatti, Ilaria Lampronti, Enrica Fabbri, Eleonora Brognara, Nicoletta Bianchi, Laura Piccagli, Marcus Chun Wah Yuen, Chi Wai Kan, Desmond Kwok Po Hau, Wang Fun Fong, Wai Yeung Wong, Raymond Siu Ming Wong, Chung Hin Chui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

47 Citations (Scopus)


Corilagin (beta-1-O-galloyl-3,6-(R)-hexahydroxydiphenoyl-d-glucose), a gallotannin identified in several plants, including Phyllanthus urinaria, has been shown to exhibit versatile medicinal activities. As far as possible anti-inflammatory effects of corilagin, only few reports are available, and the potential use of corilagin as possible therapeutic molecule for cystic fibrosis has not been evaluated. In the present paper we report experiments aimed at determining the activity of corilagin on nuclear factor kappaB (NF-kappaB) binding to DNA target and on the expression of the major pro-inflammatory gene involved in cystic fibrosis, interleukin-8 (IL-8). Both IL-8 mRNA content and IL-8 protein secretion were analyzed in cystic fibrosis bronchial IB3-1 cells stimulated by tumor necrosis factor-alpha (TNF-alpha), one of the most potent pro-inflammatory agents. The data obtained demonstrate that corilagin binds to NF-kappaB, inhibits NF-kappaB/DNA interactions and affects IL-8 gene expression in TNF-alpha treated IB3-1 cells. In addition, corilagin inhibits TNF-alpha induced secretion of MCP-1 and RANTES, exhibiting low or no effect on the release of G-CSF, IL-6 and VEGF. Therefore, corilagin might be of interest for experimental anti-inflammatory therapy of cystic fibrosis.
Original languageEnglish
Pages (from-to)308-315
Number of pages8
JournalInternational Immunopharmacology
Issue number3
Publication statusPublished - 1 Jul 2012


  • Corilagin
  • Cystic fibrosis
  • IB3-1
  • IL-8
  • NF-kappaB
  • TNF-alpha

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Pharmacology

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