Role of Human Papillomavirus in Tonsillar Cancer

Author(s):  
Eva Munck-Wikland ◽  
Lalle Hammarstedt ◽  
Hanna Dahlstrand
2021 ◽  
Vol 9 (5) ◽  
pp. 891
Author(s):  
Takashi Hatano ◽  
Daisuke Sano ◽  
Hideaki Takahashi ◽  
Nobuhiko Oridate

The incidence of oropharyngeal cancer (OPC) is increasing remarkably among all head and neck cancers, mainly due to its association with the human papillomavirus (HPV). Most HPVs are eliminated by the host’s immune system; however, because HPV has developed an effective immune evasion mechanism to complete its replication cycle, a small number of HPVs are not eliminated, leading to persistent infection. Moreover, during the oncogenic process, the extrachromosomal HPV genome often becomes integrated into the host genome. Integration involves the induction and high expression of E6 and E7, leading to cell cycle activation and increased genomic instability in the host. Therefore, integration is an important event in oncogenesis, although the associated mechanism remains unclear, especially in HPV-OPC. In this review, we summarize the current knowledge on HPV-mediated carcinogenesis, with special emphasis on immune evasion and integration mechanisms, which are crucial for oncogenesis.


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