Human papillomavirus replication cycle

The human papillomavirus replication cycle refers to the multistage process by which HPV infects host epithelial cells (especially keratinocytes) and replicates its circular double-stranded DNA genome. Upon entry, the viral genome undergoes several distinct replication phases: (1) initial amplification in the basal cell, (2) maintenance replication in concert with the host genome, and (3) vegetative amplification in differentiated keratinocytes leading to virion assembly and release. Key viral proteins involved include E1 and E2 (essential for DNA replication initiation), as well as E6 and E7 (which manipulate host cell cycle and immune pathways). The cycle is closely tied to epithelial cell differentiation and the host cell DNA damage response. The replication cycle is central to HPV pathogenicity and carcinogenesis, especially through persistent infection and eventual expression of viral oncoproteins that drive cellular transformation. The replication cycle itself is not a molecule or receptor but is a critical viral process, involving multiple protein-protein and protein-DNA interactions that are considered for antiviral drug development and therapeutic targeting.

Other names

Human papillomavirus life cycleHPV replicationHPV replication cycle

Inhibition of E1–E2 protein interaction (essential for viral DNA replication initiation). Inhibition of DNA synthesis by interfering with viral DNA binding and replication initiation. Immunotherapeutic targeting of HPV oncoproteins E6/E7 to disrupt cell transformation.