Open Access

Co-expression of ING4 and P53 enhances hypopharyngeal cancer chemosensitivity to cisplatin in vivo

  • Authors:
    • Xin Ren
    • Hao Liu
    • Mingjie Zhang
    • Mengjun Wang
    • Shiyin Ma
  • View Affiliations

  • Published online on: July 27, 2016     https://doi.org/10.3892/mmr.2016.5552
  • Pages: 2431-2438
  • Copyright: © Ren et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Hypopharyngeal cancer is a distinct type of malignant head and neck tumor, which exhibits low sensitivity to anti-cancer drugs. The importance of developing methods for reducing chemotherapy resistance, and improving and enhancing prognosis has previously been emphasized and is considered a challenge for effective clinical treatment of hypopharyngeal cancer. The current study investigated the effects of co‑expression of inhibitor of growth protein 4 (ING4) and P53, a tumor suppressor gene, on chemosensitivity to cisplatin in human hypopharyngeal cancer xenografts in vivo, and the potential molecular mechanisms involved. A tumor model was established by injecting athymic nude mice with FADU human hypopharyngeal cancer cells. Five days after intratumoral and peritumoral injections of an empty adenoviral vector (Ad), Ad‑ING4‑P53, cisplatin, or a combination of Ad‑ING4‑P53 and cisplatin (Ad‑ING4‑P53 + cisplatin) every other day for 5 days, the mice were euthanized and their tumors, livers, and kidneys were removed. The tumor weights were used to calculate the inhibition rate, and the expression levels of ING4 and P53 were detected by reverse transcription‑polymerase chain reaction. Additionally, apoptotic cells were detected using terminal deoxynucleotidyl transferase dUTP nick end labeling, and immunohistochemistry determined the levels ING4, P53, B‑cell lymphoma‑2 (Bcl‑2) and Bcl‑2 associated X protein (Bax) protein expression. The results demonstrated increased expression of ING4 and P53 in the Ad‑ING4‑P53 groups compared with PBS and Ad groups, indicating successful introduction of the genes into the tumor cells. Notably, the Ad‑ING4‑P53 + cisplatin group exhibited a higher inhibition rate compared with the four other groups. The results of immunohistochemistry analysis demonstrated that Bax expression was increased and Bcl‑2 was decreased in the Ad‑ING4‑P53 + cisplatin group. This suggested that the enhanced cisplatin chemosensitivity with Ad-ING4-P53 gene therapy in hypopharyngeal cancer xenografts may be associated with apoptosis induction through upregulation of Bax expression and downregulation of Bcl‑2. The results of the present study indicated that gene therapy combined with cisplatin treatment may be a promising treatment for human hypopharyngeal cancer.
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September-2016
Volume 14 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
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Spandidos Publications style
Ren X, Liu H, Zhang M, Wang M and Ma S: Co-expression of ING4 and P53 enhances hypopharyngeal cancer chemosensitivity to cisplatin in vivo. Mol Med Rep 14: 2431-2438, 2016.
APA
Ren, X., Liu, H., Zhang, M., Wang, M., & Ma, S. (2016). Co-expression of ING4 and P53 enhances hypopharyngeal cancer chemosensitivity to cisplatin in vivo. Molecular Medicine Reports, 14, 2431-2438. https://doi.org/10.3892/mmr.2016.5552
MLA
Ren, X., Liu, H., Zhang, M., Wang, M., Ma, S."Co-expression of ING4 and P53 enhances hypopharyngeal cancer chemosensitivity to cisplatin in vivo". Molecular Medicine Reports 14.3 (2016): 2431-2438.
Chicago
Ren, X., Liu, H., Zhang, M., Wang, M., Ma, S."Co-expression of ING4 and P53 enhances hypopharyngeal cancer chemosensitivity to cisplatin in vivo". Molecular Medicine Reports 14, no. 3 (2016): 2431-2438. https://doi.org/10.3892/mmr.2016.5552