Peridinin, a carotenoid, inhibits proliferation and survival of HTLV-1-infected T-cell lines

  • Authors:
    • Chie Ishikawa
    • Takahiro Jomori
    • Junichi Tanaka
    • Masachika Senba
    • Naoki Mori
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  • Published online on: August 4, 2016     https://doi.org/10.3892/ijo.2016.3648
  • Pages: 1713-1721
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Abstract

Human T-cell leukemia virus type 1 (HTLV-1) causes either adult T-cell leukemia (ATL) or chronic inflammatory disorders such as HTLV-1-associated myelopathy/tropical spastic paraparesis. These diseases are not curable as yet; therefore new agents for treatment and prevention are needed. Carotenoids are natural plant compounds with anti-carcinogenic activities. Peridinin is one of the most abundant carotenoids found in nature. Based on a series of past experiments, here we investigated the effects of peridinin extracted from Okinawan coral Isis hippuris on the proliferation and survival of HTLV-1-infected T-cell lines. The results of water-soluble tetrazolium-8 assay indicated that peridinin dose-dependently inhibits cell proliferation and viability of HTLV-1-infected T-cell lines. Flow cytometry showed that low concentration of peridinin induced cell cycle arrest at G1 phase, while higher concentration induced apoptosis. Peridinin caused cleavage of caspase-3, -8 and -9. Peridinin significantly reduced the expression of G1 cell cycle regulators, including cyclin D1, cyclin D2, CDK4, CDK6 and c-Myc, and anti-apoptotic proteins, including survivin, XIAP and Bcl-2, in a dose-dependent manner. Peridinin suppressed DNA binding of NF-κB. Peridinin inhibited phosphorylation of IκBα, RelA, Akt and p70 S6 kinase, and reduced protein expression level of 3-phosphoinositide-dependent protein kinase 1. Thus, peridinin exerts its anti-proliferative and pro-apoptotic effects by suppressing NF-κB and Akt signaling in HTLV-1-infected T cells. Peridinin also reduced tumor growth in mice harboring ATL xenograft tumors. The results suggested that peridinin is a potentially suitable therapeutic agent against HTLV-1-associated diseases.
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October-2016
Volume 49 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Ishikawa C, Jomori T, Tanaka J, Senba M and Mori N: Peridinin, a carotenoid, inhibits proliferation and survival of HTLV-1-infected T-cell lines. Int J Oncol 49: 1713-1721, 2016
APA
Ishikawa, C., Jomori, T., Tanaka, J., Senba, M., & Mori, N. (2016). Peridinin, a carotenoid, inhibits proliferation and survival of HTLV-1-infected T-cell lines. International Journal of Oncology, 49, 1713-1721. https://doi.org/10.3892/ijo.2016.3648
MLA
Ishikawa, C., Jomori, T., Tanaka, J., Senba, M., Mori, N."Peridinin, a carotenoid, inhibits proliferation and survival of HTLV-1-infected T-cell lines". International Journal of Oncology 49.4 (2016): 1713-1721.
Chicago
Ishikawa, C., Jomori, T., Tanaka, J., Senba, M., Mori, N."Peridinin, a carotenoid, inhibits proliferation and survival of HTLV-1-infected T-cell lines". International Journal of Oncology 49, no. 4 (2016): 1713-1721. https://doi.org/10.3892/ijo.2016.3648