TAILIEUCHUNG - Báo cáo y học: " High-risk HPV E5-induced cell fusion: a critical initiating event in the early stage of HPV-associated cervical cancer"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: High-risk HPV E5-induced cell fusion: a critical initiating event in the early stage of HPV-associated cervical cancer | Gao and Zheng Virology Journal 2010 7 238 http content 7 1 238 VIROLOGY JOURNAL HYPOTHESIS Open Access High-risk HPV E5-induced cell fusion a critical initiating event in the early stage of HPV-associated cervical cancer Peng Gao f Jie Zheng Abstract Background Cervical cancer is strongly associated with high-risk human papillomavirus HPV and viral oncoproteins E5 E6 and E7 can transform cells by various mechanisms. It is proposed that oncogenic virus-induced cell fusion may contribute to oncogenesis if p53 or apoptosis is perturbed simultaneously. Recently HPV-16 E5 was found to be necessary and sufficient for the formation of tetraploid cells which are frequently found in precancerous cervical lesions and its formation is strongly associated with HPV state. Presentation of the hypothesis We propose that high-risk HPV E5-induced cell fusion is a critical initiating event in the early stage of HPV-associated cervical cancer. Testing the hypothesis Our hypothesis can be tested by comparing the likelihood for colony formation or tumorigenic ability in nude mice between normal HaCaT cells expressing all three oncogenic proteins and E5-induced bi-nucleated HaCaT cells expressing E6 and E7. Moreover investigating premature chromosome condensation PCC in HPV-positive and negative precancerous cervical cells is another way to assess this hypothesis. Implication of the hypothesis This viewpoint would change our understanding of the mechanisms by which HPV induces cervical cancer. According to this hypothesis blocking E5-induced cell fusion is a promising way to prevent the progression of cervical cancer. Additionally establishment of a role of cell fusion in cervical carcinogenesis is of reference value for understanding the pathogenesis of other virus-associated cancers. Background Cervical cancer progression is strongly associated with infection of high-risk human papillomavirus HPV . HPV-16 and -18 which are detected in nearly all cervical cancers 1

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