title: Human papillomavirus and p16 expression in inverted papillomas of the urinary bladder.
abstract: Human Papillomaviruses (HPVs) have been found in association with benign and malignant growth of epithelia. The cell cycle inhibitor p16(Ink4a) has been shown to be overexpressed in HPV-positive cervical pre-malignant and malignant lesions, probably as a result of pRB targeting by the viral E7 protein. Inverted papillomas of the urinary bladder are epithelial tumors considered to be of benign nature. In this report we analyze the expression of p16(Ink4a) and the presence of HPV sequences in inverted papillomas and in non-tumoral bladder controls. Our results show no association of HPV infection and inverted papillomas. Further, no correlation between p16 overexpression and HPV positivity was found. We conclude that HPV does not play an indispensable role in the development of urinary bladder inverted papillomas and that overexpression of p16(Ink4a) does not correlate with HPV infection in these tumors.
authors.affiliation: Department of Pathology, Rush University, Chicago, USA.
authors.forename: Victor E
authors.initials: VE
authors.lastname: Gould
authors.forename: Markus
authors.initials: M
authors.lastname: Schmitt
authors.forename: Svetlana
authors.initials: S
authors.lastname: Vinokurova
authors.forename: Vijaya B
authors.initials: VB
authors.lastname: Reddy
authors.forename: Pincas
authors.initials: P
authors.lastname: Bitterman
authors.forename: Angel
authors.initials: A
authors.lastname: Alonso
authors.forename: Paolo
authors.initials: P
authors.lastname: Gattuso
mesh_terms: D052685:Alphapapillomavirus / Q000235:genetics / Q000302:isolation & purification*; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000378:metabolism*; D005838:Genotype; D006801:Humans; D007150:Immunohistochemistry; D010212:Papilloma / Q000378:metabolism* / Q000821:virology*; D016133:Polymerase Chain Reaction; D001749:Urinary Bladder Neoplasms / Q000378:metabolism* / Q000473:pathology / Q000821:virology*
chemical_list: D019941:Cyclin-Dependent Kinase Inhibitor p16