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HPV is believed to cause cancer by integrating its genome into nuclear DNA. Some of the early genes expressed by HPV, such as E6 and E7, act as oncogenes that promote tumor growth and malignant transformation. [17] HPV genome integration can also cause carcinogenesis by promoting genomic instability associated with alterations in DNA copy ...
For instance, in HPV+OPC the HPV E6 and E7 oncogenes merely render the p53 and pRb pathways dormant, leaving open the possibility of reactivation of these pathways by down-regulating (reducing) expression of the oncogenes. This is in contrast to the mutant form of p53 found in HPV-OPC which is associated with treatment resistance. [11]
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 January 2025. Class of vaccines against human papillomavirus Pharmaceutical compound HPV vaccine Vaccine description Target Human papillomavirus (HPV) Vaccine type Protein subunit Clinical data Trade names Gardasil, others AHFS / Drugs.com Monograph MedlinePlus a615028 License data US DailyMed: Human ...
In HPV-positive disease, these genes are less frequently mutated, and the tumour suppressor gene p53 and pRb (protein retinoblastoma) are commonly inactivated by HPV oncoproteins E6 and E7 respectively. [74] In addition, viral infections such as HPV can cause aberrant DNA methylation during cancer development. HPV-positive head and neck cancers ...
ThinPrep pap smear with group of normal cervical cells on left and HPV-infected cells showing features typical of koilocytes: enlarged (x2 or x3) nuclei and hyperchromasia. A koilocyte is a squamous epithelial cell that has undergone a number of structural changes, which occur as a result of infection of the cell by human papillomavirus (HPV ...
Papillomaviridae is a family of non-enveloped DNA viruses whose members are known as papillomaviruses. [1] Several hundred species of papillomaviruses, traditionally referred to as "types", [2] have been identified infecting all carefully inspected mammals, [2] but also other vertebrates such as birds, snakes, turtles and fish.