Developing potent 5-LOX inhibitors especially, natural product based ones, are highly attractive. Coumaperine, a natural product found in white pepper and its derivatives were herein developed as 5-LOX inhibitors. We have synthesized twenty four derivatives, characterized and evaluated their 5-LOX inhibition potential. Coumaperine derivatives substituted with multiple hydroxy and multiple methoxy groups
[EN] ANTI-QUORUM SENSING, ANTI-BIOFILM, AND INFLAMMATION ATTENUATING COMPOUNDS, COMPOSITIONS, AND METHODS OF USING SAME<br/>[FR] COMPOSÉS DE DÉTECTION ANTI-QUORUM, ANTI-BIOFILM, ET COMPOSÉS ATTÉNUANT L'INFLAMMATION, COMPOSITIONS ET LEURS MÉTHODES D'UTILISATION
申请人:B G NEGEV TECHNOLOGIES AND APPLICATIONS LTD AT BEN GURION UNIV
公开号:WO2022153306A1
公开(公告)日:2022-07-21
The present invention is directed to compounds having anti quorum sensing activity, anti-inflammatory activity or both, compositions comprising same, and methods of using same, such for treating a subject afflicted with a disease.
Coumaperine (an amide alkaloid, present in white piper) and its derivatives were synthesized and investigated for their cytotoxicity against L428 and A549 cells and their NF-kappa B inhibitory activity. It was found that the coumaperine derivatives CP-9 and CP-38 suppress NF-kappa B subunits p50 and p65 in nuclear fractions by western blot and by NF-kappa B luciferase reporter gene assay in a dose dependent manner. Confirmation of these results was obtained by confocal microscopy. CP-9, CP-32 and CP-38 also exhibited dose dependent cell cytotoxicity in a L428 cells expressing constitutively active NF-kappa B and in A549 cells, with an IC50 value of 43.25 0.39 mu g/ml and 16.85 mu g/ml respectively against L428 cells and 57.15 mu g/ml, 69.1 mu g/ml and 63.2 mu g/ml respectively against A549 cells. In addition, the coumaperine derivatives show remarkable inhibitory activity on the cancer cell migration assay against A549 lung adenocarcinoma cells at the concentrations of 5 mu g/ml, 10 mu g/ml, and 5 mu g/ml of CP-9, CP-32 and CP-38 respectively. Aromatic substituents and number of olefinic double bond in coumaperine derivatives found to influence the inhibitory activity. In luciferase reporter gene assay, di-olefin conjugated coumaperine derivatives, CP-38, CP-32 and PIP exhibited higher inhibitory activity than their corresponding tri-olefin conjugated coumaperine derivatives, CP-102, CP-146 and PIP-155 respectively. CP-32 with a stronger electron donating group (-N(CH3)(2)) showed better inhibitory activity in luciferase reporter gene assay and in cell proliferation of L428 cells. Simple coumaperine derivative (CP-9, with no substituent) effectively inhibited A549 cells proliferation and migration than the other coumaperine derivatives. CP-9 and CP-38 diminish significantly the NF-kappa B subunits (p50 and p65) of L428 cells in nuclear fractions at the dosage of 10 mu g/ml and 30 mu g/ml respectively. Which clearly shows that CP-9 and CP-38 inactivate the NF-kappa B pathway in vitro. (C) 2016 Elsevier Masson SAS. All rights reserved.
Quorum Sensing and NF-κB Inhibition of Synthetic Coumaperine Derivatives from Piper nigrum
cellular factors, including the transcription Nuclear Factor kappa B (NF-κB); this factor is found to be upregulated in many inflammatory diseases, including those induced by bacterial infection. In this study, we tested 32 synthetic derivatives of coumaperine (CP), a known natural compound found in pepper (Piper nigrum), for Quorum Sensing Inhibition (QSI) and NF-κB inhibitory activities. Of the compounds