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Benabdelaziz I, Gómez-Ruiz S, Benkhaled M, Carralero S, Schenker P, Salm A, Gertsch J, Haba H. New cycloartane-type ester triterpenes from Euphorbia pterococca and biological evaluation. Fitoterapia 2018. [PMID: 29524564 DOI: 10.1016/j.fitote.2018.02.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
From acetonic extract of the whole plant Euphorbia pterococca Brot. (Euphorbiaceae), four new cycloartane-type ester triterpenes named cycloartenyl-2'E,4'E-decadienoate (1), cycloartenyl-2'E,4'Z-decadienoate (2), 24-methylenecycloartanyl-2'E,4'Z-tetradecadienoate (3), and 24-oxo-29-norcycloartanyl-2'E,4'Z-hexadecadienoate (4) were obtained along with nine known tetracyclic triterpenes (5-13). Their structures were established mainly by extensive use of spectroscopic techniques, including 1D (1H and 13C) and 2D homo- and heteronuclear NMR experiments (COSY, HSQC, HMBC and NOESY), and mass spectrometry (HRESIMS), and by comparison with data reported in the literature. In addition, the new compounds 1-3 have been tested for cytotoxicity, trypanocidal effects and on enzymes involved in endocannabinoid degradation. While inactive in all assays up to 100 μM, 1 showed selective inhibition of α/β-hydrolase 12 with an IC50 of 11.6 ± 1.9 μM.
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Affiliation(s)
- Imane Benabdelaziz
- Laboratoire de Chimie et Chimie de l'Environnement (L.C.C.E.), Département de Chimie, Faculté des Sciences de la matière, Université de Batna-1, Batna 05000, Algeria; Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain.
| | - Santiago Gómez-Ruiz
- Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Mohammed Benkhaled
- Laboratoire de Chimie et Chimie de l'Environnement (L.C.C.E.), Département de Chimie, Faculté des Sciences de la matière, Université de Batna-1, Batna 05000, Algeria
| | - Sandra Carralero
- Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Patricia Schenker
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstrasse 28, CH-3012 Bern, Switzerland
| | - Andrea Salm
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstrasse 28, CH-3012 Bern, Switzerland
| | - Jürg Gertsch
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstrasse 28, CH-3012 Bern, Switzerland
| | - Hamada Haba
- Laboratoire de Chimie et Chimie de l'Environnement (L.C.C.E.), Département de Chimie, Faculté des Sciences de la matière, Université de Batna-1, Batna 05000, Algeria.
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