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Myricetin induces apoptosis by inhibiting P21 activated kinase 1 (PAK1) signaling cascade in hepatocellular carcinoma

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Abstract

Hepatocellular carcinoma is one of the most common malignancies worldwide and evidence suggests that Ras signaling regulates various hallmarks of cancer via regulating several effector pathways such as ERK and PI3K. The aim of the present study is to understand the efficacy of a flavonoid myricetin for the first time in inhibiting the downstream target p21 activated kinase 1 (PAK1) of Ras signaling pathway in hepatocellular carcinoma. The analysis of gene expression revealed that myricetin inhibits PAK1 by abrogating the Ras-mediated signaling by decelerating Wnt signaling, the downstream of Erk/Akt, thereby inducing intrinsic caspase-mediated mitochondrial apoptosis by downregulating the expression of anti-apoptotic Bcl-2 and survivin and upregulating pro-apoptotic Bax. The results also provide striking evidence that the myricetin inhibits the development of HCC by inhibiting PAK1 via coordinate abrogation of MAPK/ERK and PI3K/AKT and their downstream signaling Wnt/β-catenin pathway, thus being a promising candidate for cancer prevention and therapy.

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Acknowledgments

We acknowledge Department of Biotechnology (Project No. BT/PR1440/AAQ/03/532/2010) for financial assistance.

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Authors and Affiliations

  1. Unit of Biochemistry, Department of Zoology, School of Life Sciences, University of Madras, Guindy Campus, Chennai, 600025, Tamil Nadu, India

    Soumya C. Iyer, Ashidha Gopal & Devaraj Halagowder

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  1. Soumya C. Iyer
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  2. Ashidha Gopal
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  3. Devaraj Halagowder
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Correspondence to Devaraj Halagowder.

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Iyer, S.C., Gopal, A. & Halagowder, D. Myricetin induces apoptosis by inhibiting P21 activated kinase 1 (PAK1) signaling cascade in hepatocellular carcinoma. Mol Cell Biochem 407, 223–237 (2015). https://doi.org/10.1007/s11010-015-2471-6

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  • DOI: https://doi.org/10.1007/s11010-015-2471-6

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