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Antagonism between gene therapy and epigenetic therapy on human laryngeal carcinoma tumor-bearing mice

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Background Gene therapy and epigenetic therapy have gained more attention in cancer treatment.However,the effect of a combined treatment of gene therapy and epigenetic therapy on head and neck squamous cell carcinoma have not been studied yet.To study the mechanism and clinical application,human laryngeal carcinoma cell (Hep-2) tumor-bearing mice were used.Methods A xenograft tumor model was established by the subcutaneous inoculation of Hep-2 cells in the right armpit of BALB/c nu/nu mice.The mice with well-formed tumor were randomly divided into six groups.Multisite injections of rAd-p53 and/or 5-aza-dC were used to treat tumor.Tumor growth was monitored by measuring tumor volume and growth rate.p53 and E-cadherin protein levels in tumor tissues were detected by immunohistochemical staining.The mRNA levels were monitored with FQ-PCR.Results Gene therapy was much more effective than single epigenetic therapy and combined therapy.The gene therapy group has the lowest tumor growth rate and the highest expression levels of p53 and E-cadherin.Conclusions The combined treatment of gene and epigenetic therapy is not suggested for treating head and neck carcinoma,because gene therapy shows an antagonistic effect to epigenetic therapy.However,the mechanisms of action are still unclear.

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作者单位: Department of Otorhinolaryngology, Head and Neck Surgery,Affiliated Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China [1]
期刊: 《中华医学杂志(英文版)》2013年126卷2期 248-253页 SCIMEDLINEISTICCSCDBP
栏目名称: ORIGINAL ARTICLES
DOI: 10.3760/cma.j.issn.0366-6999.20120063
发布时间: 2013-04-19
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