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Article

Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells

  • Authors:
    • Eri Kokaji
    • Akiko Shimomura
    • Takashi Minamisaka
    • Takahiko Nakajima
    • Shigeharu Miwa
    • Hideki Hatta
    • Takeshi Nishida
    • Chieko Kiya
    • Johji Imura
  • View Affiliations / Copyright

    Affiliations: Department of Diagnostic Pathology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
  • Pages: 892-900
    |
    Published online on: February 1, 2018
       https://doi.org/10.3892/ijo.2018.4262
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Abstract

In this study, we investigated the ability of pancreatic cancer cell lines to form spheroids with the aim of identifying factors involved in cell invasiveness, a property that leads to a poor prognosis in pancreatic cancer. For this purpose, 8 cell lines derived from human pancreatic cancer tissues were cultured in non-adherent culture conditions to form spheroids, as well as normal monolayers. The morphology of the cells was observed and spheroid diameters measured. mRNA expression was compared between cells cultured under both culture conditions. The gene knockdown of endoglin (ENG) and SMAD4, components of the transforming growth factor-β (TGF-β) signaling system, using siRNAs was conducted in spheroids in order to identify affected protein signaling factors, determine the morphological changes occurring over time and to measure the invasive capacity of the cells constituting spheroids. The cell lines exhibited differences in their spheroid-forming abilities. The expression of SMAD4 and ENG concomitantly increased in the cells that formed spheroids. SMAD4 was transported into the nucleus when spheroids were formed. The expression of ENG was decreased in the cells in which SMAD4 was knocked down; by contrast, the expression of BMP and activin membrane-bound inhibitor (BAMBI) and noggin (NOG), further components of the TGF-β signaling system, increased. In the cells in which ENG was knocked down, the decreased mRNA expression of TGF-β receptor type 2 (TGFBR2) and SMAD9 was observed, as well as a change in the expression of pSMAD1/5/9, and a tendency of spheroids to decrease in size. Spheroids cultured on Matrigel exhibited a tendency towards a reduction in size over time, as well as a tendency to invade into the Matrigel. In particular, the cells in which ENG was knocked down exhibited spheroids which were reduced in size, and also exhibited an increase in invasiveness, and a decrease in adhesiveness. Thus, our data indicate that in pancreatic cancer cells, the expression of ENG may be controlled by a pathway mediated by SMAD4. In addition, ENG was found to be related to the spheroid-forming ability of cells and to be involved in the invasive capacity of pancreatic cancer cells.
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Copy and paste a formatted citation
Spandidos Publications style
Kokaji E, Shimomura A, Minamisaka T, Nakajima T, Miwa S, Hatta H, Nishida T, Kiya C and Imura J: Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells. Int J Oncol 52: 892-900, 2018.
APA
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H. ... Imura, J. (2018). Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells. International Journal of Oncology, 52, 892-900. https://doi.org/10.3892/ijo.2018.4262
MLA
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H., Nishida, T., Kiya, C., Imura, J."Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells". International Journal of Oncology 52.3 (2018): 892-900.
Chicago
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H., Nishida, T., Kiya, C., Imura, J."Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells". International Journal of Oncology 52, no. 3 (2018): 892-900. https://doi.org/10.3892/ijo.2018.4262
Copy and paste a formatted citation
x
Spandidos Publications style
Kokaji E, Shimomura A, Minamisaka T, Nakajima T, Miwa S, Hatta H, Nishida T, Kiya C and Imura J: Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells. Int J Oncol 52: 892-900, 2018.
APA
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H. ... Imura, J. (2018). Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells. International Journal of Oncology, 52, 892-900. https://doi.org/10.3892/ijo.2018.4262
MLA
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H., Nishida, T., Kiya, C., Imura, J."Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells". International Journal of Oncology 52.3 (2018): 892-900.
Chicago
Kokaji, E., Shimomura, A., Minamisaka, T., Nakajima, T., Miwa, S., Hatta, H., Nishida, T., Kiya, C., Imura, J."Endoglin (CD105) and SMAD4 regulate spheroid formation and the suppression of the invasive ability of human pancreatic cancer cells". International Journal of Oncology 52, no. 3 (2018): 892-900. https://doi.org/10.3892/ijo.2018.4262
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