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A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway

  • Authors:
    • Min‑Kyeong Lee
    • In‑Hye Kim
    • Youn‑Hee Choi
    • Taek‑Jeong Nam
  • View Affiliations / Copyright

    Affiliations: Department of Food Science and Nutrition, Pukyong National University, Busan 608‑737, Republic of Korea, Institute of Fisheries Science, Pukyong National University, Busan 619‑911, Republic of Korea
    Copyright: © Lee et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 533-538
    |
    Published online on: December 11, 2014
       https://doi.org/10.3892/ijmm.2014.2037
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Abstract

Porphyra yezoensis (P. yezoensis) is the most noteworthy red alga and is mainly consumed in China, Japan and Korea. In the present study, the effects of a P. yezoensis peptide (PY‑PE) on cell proliferation and the associated signaling pathways were examined in IEC‑6 rat intestinal epithelial cells. First, the MTS assay showed that PY‑PE induced cell proliferation in a dose‑dependent manner. Subsequently, the mechanism behind the proliferative activity induced by PY‑PE was determined. The insulin‑like growth factor‑I receptor (IGF‑IR) signaling pathway was the main focus as it plays an important role in the regulation of cell growth and proliferation. PY‑PE increased the protein and mRNA expression of IGF‑IR, insulin receptor substrate‑1, Shc and PY‑99. In addition, PY‑PE stimulated extracellular signal‑regulated kinase phosphorylation and phosphatidylinositol 3‑kinase/Akt activation but inhibited p38 and c‑Jun N‑terminal kinase phosphorylation. Furthermore, PY‑PE treatment increased protein and mRNA expression levels of activator protein‑1, which regulates cell proliferation and survival, in the nuclear fraction. These results have significant implications for understanding the role of cell proliferation signaling pathways in intestinal epithelial cells.
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Copy and paste a formatted citation
Spandidos Publications style
Lee MK, Kim IH, Choi YH and Nam TJ: A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway. Int J Mol Med 35: 533-538, 2015.
APA
Lee, M., Kim, I., Choi, Y., & Nam, T. (2015). A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway. International Journal of Molecular Medicine, 35, 533-538. https://doi.org/10.3892/ijmm.2014.2037
MLA
Lee, M., Kim, I., Choi, Y., Nam, T."A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway". International Journal of Molecular Medicine 35.2 (2015): 533-538.
Chicago
Lee, M., Kim, I., Choi, Y., Nam, T."A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway". International Journal of Molecular Medicine 35, no. 2 (2015): 533-538. https://doi.org/10.3892/ijmm.2014.2037
Copy and paste a formatted citation
x
Spandidos Publications style
Lee MK, Kim IH, Choi YH and Nam TJ: A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway. Int J Mol Med 35: 533-538, 2015.
APA
Lee, M., Kim, I., Choi, Y., & Nam, T. (2015). A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway. International Journal of Molecular Medicine, 35, 533-538. https://doi.org/10.3892/ijmm.2014.2037
MLA
Lee, M., Kim, I., Choi, Y., Nam, T."A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway". International Journal of Molecular Medicine 35.2 (2015): 533-538.
Chicago
Lee, M., Kim, I., Choi, Y., Nam, T."A peptide from Porphyra yezoensis stimulates the proliferation of IEC-6 cells by activating the insulin-like growth factor I receptor signaling pathway". International Journal of Molecular Medicine 35, no. 2 (2015): 533-538. https://doi.org/10.3892/ijmm.2014.2037
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