Synthesis, Urease Inhibition and Molecular Modelling Studies of Novel Derivatives of the Naturally Occurring β-Amyrenone

Natural Products and Bioprospecting

卷:9

Guy R. T. Feuya¹  Jean J. K. Bankeu²  Marthe A. T. Tchuenmogne³  Augustin S. Ngouela³  Bruno N. Lenta⁴  Fidele Ntie-Kang⁵  Conrad V. Simoben⁵  Muhammad S. Ali⁶  Yannick S. F. Fongang⁶  Syeda W. Muhammadi⁶  Hira Sattar⁶  Mehreen Lateef⁷ 

[1] Department of Chemistry, Faculty of Science, Scientific and Technical University of Masuku;

[2] Department of Chemistry, Faculty of Science, The University of Bamenda;

[3] Department of Chemistry, Faculty of Science, University of Yaoundé I;

[4] Department of Chemistry, Higher Teacher Training College, University of Yaoundé I;

[5] Department of Pharmaceutical Chemistry, Martin-Luther University of Halle-Wittenberg;

[6] International Center for Chemical and Biological Sciences, University of Karachi;

[7] Multi-Disciplinary Research Laboratory (MDRL), Bahria University Medical and Dental College, Bahria University;

关键词: Helicobacter pylori;    Urease inhibition;    Docking;    Olean-12-en-3-one derivatives;   

DOI  :  10.1007/s13659-018-0193-7

来源: DOAJ

【 摘 要 】

Abstract Urease enzyme (UE) has been reported to be a potent virulence factor for Helicobacter pylori (HP) bacteria indicated to be responsible for various gastrointestinal diseases. Therefore, the spread of HP, currently regarded by the World Health Organization as a class 1 carcinogen, could be better controlled by targeting UE. It is in this line that we have synthesized three new derivatives (2–4) of the naturally occurring olean-12-en-3-one (1), which was previously isolated from the figs of Ficus vallis-choudae Delile (Moraceae). Among the synthesized compounds, 3 and 4 contain an indole moiety. Their structures were unambiguously assigned by spectroscopic and spectrometric techniques (1D-NMR, 2D-NMR and MS). The starting material and the synthesized compounds were screened for UE inhibition activity, and showed significant activities with IC50 values ranging from 14.5 to 24.6 μM, with compound (1) being the most potent as compared to the positive control thiourea (IC50 = 21.6 μM). Amongst the synthetic derivatives, compound 4 was the most potent (IC50 = 17.9 μM), while the others showed activities close to that of the control. In addition, molecular docking study of target compounds 2–4 was performed in an attempt to explore their binding mode for the design of more potent UE inhibitors. Graphical Abstract

【 授权许可】

Unknown