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Sulfated Triterpene Glycosides from the Saudi Red Sea Cucumber Holothuria atra with Antioxidant and Cytotoxic Activities

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Thalassas: An International Journal of Marine Sciences Aims and scope Submit manuscript

Abstract

The bioactive constituents of sea cucumber Holothuria atra were investigated, and four sulfated holostan-type triterpene glycosides (14) along with other seven know metabolites were obtained. On the basis of the extensive NMR and ESI-MS data, the structures of triterpenoid saponins were assigned as a new compound echinoside B 12-O-methyl ether (1), and known echinoside B (2), 24-dehydroechinoside B (3), and holothurin B (4). The extract and isolated saponins displayed weak antioxidant DPPH radical scavenging activities, where echinoside B (2) showed the highest value at 26.41%. However, 24-dehydroechinoside B (3) showed mild antioxidant-reducing power activity (0.19 nm), compared to the synthetic antioxidant (BHT). Both compounds 2 and 3 exhibited moderate cytotoxic activity by reducing the viability of Ehrlich ascites carcinoma cells to 41.0% and 42.2%, respectively, compared to the drug control vincristine (95.2%).

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Acknowledgements

This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah under grant No (G: 1314-150-1440). The authors, therefore, acknowledge with thank DSR for technical and financial support.

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Correspondence to Usama W. Hawas.

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The authors declare no conflict of interest relating to the article.

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Hawas, U.W., Abou El-Kassem, L.T., Shaher, F.M. et al. Sulfated Triterpene Glycosides from the Saudi Red Sea Cucumber Holothuria atra with Antioxidant and Cytotoxic Activities. Thalassas 37, 817–824 (2021). https://doi.org/10.1007/s41208-021-00305-4

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  • DOI: https://doi.org/10.1007/s41208-021-00305-4

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