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Dieckol, isolated from Ecklonia stolonifera, induces apoptosis in human hepatocellular carcinoma Hep3B cells

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Abstract

Phlorotannins have been reported to demonstrate several biological properties, including antioxidant activity, and activities useful in the treatment of diabetic complications and in chemoprevention of several vascular diseases. In this study, we focused on the apoptosis induced by dieckol, a marine algal phlorotannin isolated from Ecklonia stolonifera, on human hepatocellular carcinoma (HCC) Hep3B cells. Dieckol reduced the numbers of viable cells and increased the numbers of apoptotic cells in a dose-dependent manner. Immunoblotting analysis revealed that dieckol increased the expression levels of cleaved caspases-3, 7, 8, and 9, and cleaved poly(ADP-ribose) polymerase. Dieckol increased the permeability of mitochondrial membranes and the release of cytochrome c from mitochondria into the cytosol with apoptosis-inducing factor. In addition, dieckol induced increased expression of truncated Bid and Bim. The results indicate that dieckol induces apoptosis via the activation of both death receptor and mitochondrial-dependent pathways in HCC Hep3B cells.

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Acknowledgments

This work was financially supported by the Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea.

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Authors and Affiliations

  1. Department of Microbiology, College of Natural Sciences, Pukyong National University, 45 Yongsoro, Namgu, Busan, 608-737, Korea

    Jin-Soo Yoon, Anandam Kasin Yadunandam, Soon-Jin Kim & Gun-Do Kim

  2. Division of Applied Chemical Engineering, College of Engineering, Pukyong National University, Busan, 608-737, Korea

    Hee-Chul Woo

  3. Department of Food Science and Nutrition, College of Fishery Sciences, Pukyong National University, Busan, 608-737, Korea

    Hyeung-Rak Kim

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  1. Jin-Soo Yoon
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Correspondence to Gun-Do Kim.

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Yoon, JS., Kasin Yadunandam, A., Kim, SJ. et al. Dieckol, isolated from Ecklonia stolonifera, induces apoptosis in human hepatocellular carcinoma Hep3B cells. J Nat Med 67, 519–527 (2013). https://doi.org/10.1007/s11418-012-0709-0

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  • DOI: https://doi.org/10.1007/s11418-012-0709-0

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