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Dieckol: an algal polyphenol attenuates urban fine dust-induced inflammation in RAW 264.7 cells via the activation of anti-inflammatory and antioxidant signaling pathways

  • 23rd INTERNATIONAL SEAWEED SYMPOSIUM, JEJU
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Abstract

Fine dust-associated complications related to human health are one of the major issues in the East-Asia region. In the present study, we evaluated anti-inflammatory effect of dieckol in fine dust-stimulated RAW 264.7 macrophage cells and its biological mechanism. The result showed that the exposure of macrophages to fine dust induced the productions of nitric oxide (NO), prostaglandin E2 (PGE2), and the mRNA expression levels of inflammatory mediators such as inducible NO synthase (iNOS) and cyclooxygenase (COX)-2 whereas it was significantly attenuated by the treatment of dieckol. In addition, fine dust increased the pro-inflammatory cytokines such as interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α that were down-regulated by dieckol. Interestingly, dieckol protected macrophages against cell damages via reducing the fine dust-caused intracellular reactive oxygen species (ROS) generation via induction of superoxide dismutase production as well as the HO-1/Nrf2 signaling activation. In conclusion, dieckol protects RAW 264.7 cells against fine dust-induced inflammation and oxidative stress via inducing anti-inflammatory and antioxidant mechanisms.

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Funding

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1A6A1A03033553).

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Authors and Affiliations

  1. Laboratory of Marine Bioresource Technology, Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, Jeju, 63243, Republic of Korea

    K. K. Asanka Sanjeewa, I. P.S. Fernando, Hyun-Soo Kim, Thilina U. Jayawardena, BoMi Ryu, Hye-Won Yang, WonWoo Lee & You-Jin Jeon

  2. Department of Food Technology and Nutrition, Chonnam National University, Yeosu, Republic of Korea

    Ginnae Ahn

  3. Freshwater Biosources Utilization Bureau, Bioresources Industrialization Support Division, Nakdonggang National Institute of Biological Resources(NNIBR), Sangju, Republic of Korea

    WonWoo Lee

  4. Marine Science Institute, Jeju National University, Jeju, Self-Governing Province, 63333, Republic of Korea

    You-Jin Jeon

Authors
  1. K. K. Asanka Sanjeewa
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  2. I. P.S. Fernando
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  3. Hyun-Soo Kim
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  4. Thilina U. Jayawardena
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  5. BoMi Ryu
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  6. Hye-Won Yang
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  7. Ginnae Ahn
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  8. WonWoo Lee
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  9. You-Jin Jeon
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Correspondence to WonWoo Lee or You-Jin Jeon.

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Sanjeewa, K.K.A., Fernando, I.P., Kim, HS. et al. Dieckol: an algal polyphenol attenuates urban fine dust-induced inflammation in RAW 264.7 cells via the activation of anti-inflammatory and antioxidant signaling pathways. J Appl Phycol 32, 2387–2396 (2020). https://doi.org/10.1007/s10811-019-01964-w

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  • DOI: https://doi.org/10.1007/s10811-019-01964-w

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