title: TP53 in urologic tumors.
abstract: TP53, a gene located on chromosome 17p13, encodes a nuclear protein (p53) involved in cell cycle regulation. This protein degrades in 20 minutes. However, the inactivated gene can produce a protein with a half-life 4-20 times longer than that of the wild type; it can be demonstrated by immunohistochemistry. Unfortunately, all the antibodies recognize both proteins, and the determination of a cutoff in the percentage of positive nuclei is required for the detection of cases with correlation of the TP53 mutation. In urologic tumors, p53 overexpression determination can be diagnostic help in low grade superficial bladder cancer, in cases of cystectomy and pN0, and in penile cancer without clinically involved lymph nodes. It does not seem useful in renal cell carcinoma or testicular germ cell tumors, and its utility is limited in prostate carcinoma.
authors.affiliation: Pathology Section, Fundació Puigvert, Autonomous University of Barcelona, Cartagena 340-350, 08025 Barcelona, Spain. falgaba@fundacio-puigvert.es
authors.forename: Ferran
authors.initials: F
authors.lastname: Algaba
authors.forename: Isabel
authors.initials: I
authors.lastname: Trias
authors.forename: Alfredo
authors.initials: A
authors.lastname: Santinelli
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Montironi
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000378:metabolism / Q000556:secondary; D014408:Biomarkers, Tumor / Q000378:metabolism; D016158:Genes, p53 / Q000235:genetics*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009363:Neoplasm Proteins / Q000235:genetics* / Q000378:metabolism; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000378:metabolism; D001749:Urinary Bladder Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; D016159:Tumor Suppressor Protein p53