Antileishmanial Lead Structures from Nature: Analysis of Structure-Activity Relationships of a Compound Library Derived from Caffeic Acid Bornyl Ester

Molecules

Jan Glaser³  Martina Schultheis¹  Sudipta Hazra²  Banasri Hazra²  Heidrun Moll¹  Uta Schurigt¹ 

[1] Institute for Molecular Infection Biology, University of Würzburg, Josef-Schneider-Str. 2, Würzburg 97080, Germany; E-Mails:;Department of Pharmaceutical Technology, Jadavpur University, Kolkata-700032, India; E-Mails:;Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany; E-Mail:

关键词: Valeriana wallichii;    leishmaniasis;    caffeic acid bornyl ester;    structure-activity relationship;   

DOI  :  10.3390/molecules19021394

来源: mdpi

【 摘 要 】

Bioassay-guided fractionation of a chloroform extract of Valeriana wallichii (V. wallichii) rhizomes lead to the isolation and identification of caffeic acid bornyl ester (1) as the active component against Leishmania major (L. major) promastigotes (IC₅₀ = 48.8 µM). To investigate the structure-activity relationship (SAR), a library of compounds based on 1 was synthesized and tested in vitro against L. major and L. donovani promastigotes, and L. major amastigotes. Cytotoxicity was determined using a murine J774.1 cell line and bone marrow derived macrophages (BMDM). Some compounds showed antileishmanial activity in the concentration range of pentamidine and miltefosine which are the standard drugs in use. In the L. major amastigote assay compounds 15, 19 and 20 showed good activity with relatively low cytotoxicity against BMDM, resulting in acceptable selectivity indices. Molecules with adjacent phenolic hydroxyl groups exhibited elevated cytotoxicity against murine cell lines J774.1 and BMDM. The Michael system seems not to be essential for antileishmanial activity. Based on the results compound 27 can be regarded as new lead structure for further structure optimization.

【 授权许可】

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