Open Access

Lentivirus‑mediated RNA interference inhibits the tumorigenicity of cluster of differentiation 44+ tumor cells in hypopharyngeal cancer

  • Authors:
    • Chenling Shen
    • Bin Ye
    • Haixia Hu
    • Chen Nie
    • Yan Ma
    • Jingrong Lv
    • Hao Wu
    • Mingliang Xiang
  • View Affiliations

  • Published online on: August 28, 2017     https://doi.org/10.3892/ol.2017.6838
  • Pages: 5354-5360
  • Copyright: © Shen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study aimed to investigate whether the inhibition of cluster of differentiation (CD)44 expression reduces the tumorigenicity of CD44+ cancer stem cells in hypopharyngeal cancer. To assess this, effective recombinant CD44 short hairpin RNA‑expressing lentiviruses were produced. Lentivirus‑mediated RNA interference (RNAi) was then used to knockdown CD44 gene expression in the hypopharyngeal cancer FaDu cell line. The viability of FaDu cells in the two control groups and the RNAi group (RNAi‑CD44 lentiviral vector) was detected using an MTT assay in vitro. Cells from each group were injected into non‑obese diabetic/severe combined immunodeficiency mice and their tumorigenicity determined in vivo. Following lentivirus‑mediated RNAi, an MTT assay indicated that cells from the RNAi group exhibited lower viability than the control group. The in vivo tumorigenicity study further revealed a significant difference in tumorigenic rates between the RNAi group and the control group (Fisher's exact test, P<0.05). In addition, tumors in the RNAi group of animals had a longer incubation period than those in the control groups, and the mean tumor volume was also significantly smaller (t=3.47, P<0.05). Pathological study confirmed that all tumors were poorly differentiated squamous cell carcinomas with cellular heterogeneity. The viability of the hypopharyngeal cancer FaDu cells in vitro and their tumorigenicity in vivo were markedly inhibited once CD44 was knocked down. The results of the present study therefore suggest that CD44 may confer tumorigenic characteristics upon CD44+ cancer stem cells in hypopharyngeal cancer.
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November-2017
Volume 14 Issue 5

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Shen C, Ye B, Hu H, Nie C, Ma Y, Lv J, Wu H and Xiang M: Lentivirus‑mediated RNA interference inhibits the tumorigenicity of cluster of differentiation 44+ tumor cells in hypopharyngeal cancer. Oncol Lett 14: 5354-5360, 2017
APA
Shen, C., Ye, B., Hu, H., Nie, C., Ma, Y., Lv, J. ... Xiang, M. (2017). Lentivirus‑mediated RNA interference inhibits the tumorigenicity of cluster of differentiation 44+ tumor cells in hypopharyngeal cancer. Oncology Letters, 14, 5354-5360. https://doi.org/10.3892/ol.2017.6838
MLA
Shen, C., Ye, B., Hu, H., Nie, C., Ma, Y., Lv, J., Wu, H., Xiang, M."Lentivirus‑mediated RNA interference inhibits the tumorigenicity of cluster of differentiation 44+ tumor cells in hypopharyngeal cancer". Oncology Letters 14.5 (2017): 5354-5360.
Chicago
Shen, C., Ye, B., Hu, H., Nie, C., Ma, Y., Lv, J., Wu, H., Xiang, M."Lentivirus‑mediated RNA interference inhibits the tumorigenicity of cluster of differentiation 44+ tumor cells in hypopharyngeal cancer". Oncology Letters 14, no. 5 (2017): 5354-5360. https://doi.org/10.3892/ol.2017.6838