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  • Title: [Combination of adenovirus p16(INK4A) gene therapy and ionizing radiation for laryngeal squamous cell carcinoma].
    Author: Fu YJ, Liu SX, Xian JM.
    Journal: Sichuan Da Xue Xue Bao Yi Xue Ban; 2004 Mar; 35(2):209-11. PubMed ID: 15071918.
    Abstract:
    OBJECTIVE: To assess the anti-tumor effect of p16(INK4A) gene transfer and the combined effect of this gene therapy and ionizing radiation in the treatment of laryngeal squamous cell carcinoma. METHODS: A Complete p16(INK4A) gene was inserted into a replication-defective recombinant adenovirus, and the tumor cells were infected with Adenovinus-p16 (Ad-p16) and irradiated with X-rays. Confirmation of P16(INK4A) protein expression after Ad-p16 infection was performed by Western blotting. The therapeutic effects were evaluated both in vitro and in vivo. RESULTS: The replication-defective recombinant adenovirus could direct a high level of P16INK4A protein expression in laryngeal squamous cell carcinoma. Studies both in vitro and in vivo demonstrated that Ad-p16 treatment significantly inhibited the cell growth and the established tumors in mude mice when compared with the control treatments (P < 0.05). The combination of Ad-p16 and radiation group resulted in greater inhibition of tumor growth, compared with any other treatment groups and controls (P < 0.05). No significant difference was observed between Adenovirus-LacZ (Ad-LacZ) and PBS groups. CONCLUSION: These results demonstrate a significant antitumor effect of Ad-p16 against human laryngeal squamous cell carcinoma and also demonstrate for the first time a combined effect of radiation and Ad-p16 gene transfer in p16 deficient human laryngeal squamous cell carcinoma.
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