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TALEN-mediated targeting of HPV oncogenes ameliorates HPV-related cervical malignancy

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单位: [1]Cancer Biology Research Center,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology (HUST),Wuhan,Hubei,China. [2]Department of Neurology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology (HUST),Wuhan,Hubei,China. [3]Center for Reproductive Medicine, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China.
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Persistent HPV infection is recognized as the main etiologic factor for cervical cancer. HPV expresses the oncoproteins E6 and E7, both of which play key roles in maintaining viral infection and promoting carcinogenesis. While siRNA-mediated targeting of E6 and E7 transcripts temporarily induces apoptosis in HPV-positive cells, it does not eliminate viral DNA within the host genome, which can harbor escape mutants. Here, we demonstrated that specifically targeting E6 and E7 within host DNA with transcription activator-like effector nucleases (TALENs) induces apoptosis, inhibits growth, and reduces tumorigenicity in HPV-positive cell lines. TALEN treatment efficiently disrupted E6 and E7 oncogenes, leading to the restoration of host tumor suppressors p53 and retinoblastoma 1 (RB1), which are targeted by E6 and E7, respectively. In the K14-HPV16 transgenic mouse model of HPV-driven neoplasms, direct cervical application of HPV16-E7-targeted TALENs effectively mutated the E7 oncogene, reduced viral DNA load, and restored RB1 function and downstream targets transcription factor E2F1 and cycling-dependent kinase 2 (CDK2), thereby reversing the malignant phenotype. Together, the results from our study suggest that TALENs have potential as a therapeutic strategy for HPV infection and related cervical malignancy.

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基金编号: 2015CB553903 2013CB911304 2009CB521806 81372805 81090414 81301126 81402158 81471508 81101971 81402159 81272859 81372801 81302266 81372806 81370469 81403166 81172466 81101964 81172468 81230052 81230038

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出版当年[2014]版:
大类 | 1 区 医学
小类 | 1 区 医学:研究与实验
最新[2025]版:
大类 | 1 区 医学
小类 | 1 区 医学:研究与实验
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出版当年[2013]版:
Q1 MEDICINE, RESEARCH & EXPERIMENTAL
最新[2023]版:
Q1 MEDICINE, RESEARCH & EXPERIMENTAL

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第一作者单位: [1]Cancer Biology Research Center,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology (HUST),Wuhan,Hubei,China.
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通讯机构: [1]Cancer Biology Research Center,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology (HUST),Wuhan,Hubei,China. [*1]Cancer Biology Research Center,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,1095 Jiefang Road,Wuhan 430030,Hubei,China
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