Human papillomavirus and p16 expression in inverted papillomas of the urinary bladder |
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Authors: | Victor E Gould Markus Schmitt Svetlana Vinokurova Vijaya B Reddy Pincas Bitterman Angel Alonso Paolo Gattuso |
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Institution: | 1. Department of Pathology, Rush University, Chicago, USA;2. Deutsches Krebsforschungszentrum, Im Neuenheimer Feld-242, 69120-Heidelberg, Germany;3. Institute of Pathology, University of Heidelberg, Im Neuenheimer Feld-220/221, 69120-Heidelberg, Germany |
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Abstract: | Human Papillomaviruses (HPVs) have been found in association with benign and malignant growth of epithelia. The cell cycle inhibitor p16Ink4a 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 p16Ink4a 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 p16Ink4a does not correlate with HPV infection in these tumors. |
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Keywords: | HPV Genotyping Bladder p16 |
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