title: Heat shock protein 90 is associated with hyperplasia and neoplastic transformation of canine prostatic epithelial cells.
abstract: Heat shock protein 90 (HSP90) is a molecular chaperone that regulates critical signalling proteins of cancer development and progression. Abnormal levels of HSP90 have been observed in human prostatic carcinoma (PC), with prognostic and therapeutic implications. Since spontaneously arising canine PC is a valuable model for the human disease, the aim of this study was to evaluate the immunohistochemical expression of HSP90 in two normal canine prostates, 17 canine prostates with benign prostatic hyperplasia (BPH) and five canine prostates with PC. HSP90 was expressed in the cytoplasm of epithelial cells in all samples, with a significant increase in labelled cells in PCs. Nuclear labelling was observed occasionally in normal tissue, but was increased in BPH and PC. HSP90 immunoreactivity in preneoplastic lesions (proliferative inflammatory atrophy and prostatic intraepithelial neoplasia) was similar to that in PCs. Increased HSP90 expression in canine PCs suggests the involvement of this molecule in carcinogenesis and tumour progression, supporting HSP90 as a potential target for therapeutic intervention.
authors.affiliation: School of Veterinary Science, University of Queensland, Gatton Campus, Gatton 4343, Queensland, Australia.
authors.forename: C
authors.initials: C
authors.lastname: Palmieri
authors.affiliation: Faculty of Veterinary Medicine, Teramo University, Piazza Aldo Moro 45, 64100 Teramo, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Mancini
authors.affiliation: DIMEVET, Department of Veterinary Medical Sciences, School of Agriculture and Veterinary Medicine, University of Bologna, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Benazzi
authors.affiliation: Faculty of Veterinary Medicine, Teramo University, Piazza Aldo Moro 45, 64100 Teramo, Italy. Electronic address: ldellasalda@unite.it.
authors.forename: L
authors.initials: L
authors.lastname: Della Salda
mesh_terms: D000818:Animals; D002277:Carcinoma / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D002471:Cell Transformation, Neoplastic / Q000378:metabolism* / Q000473:pathology; D018450:Disease Progression; D004283:Dog Diseases / Q000378:metabolism* / Q000473:pathology; D004285:Dogs; D018841:HSP90 Heat-Shock Proteins / Q000378:metabolism*; D008297:Male; D011467:Prostate / Q000378:metabolism* / Q000473:pathology; D011470:Prostatic Hyperplasia / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D011471:Prostatic Neoplasms / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*
chemical_list: D018841:HSP90 Heat-Shock Proteins
keywords: HSP90; dog; immunohistochemistry; prostate