2018
DOI: 10.1590/1678-4162-9472
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Expression of cell cycle inhibitors in canine prostate with proliferative inflammatory atrophy and carcinoma

Abstract: Gene expression of CDKN1A, CDKN1B, and TP53, and immunostaining of p21, p27 and p53 were evaluated to verify the role of these cell cycle inhibitors in canine prostates with proliferative inflammatory atrophy-PIA and prostatic carcinoma-PC. Seventy samples, 15 normal, 30PIA and 25PC. Regarding number of p27 and p53 labeled cells, difference between normal and PIA and PC was observed, as well as between PIA and PC for p53. Immunostaining intensities of p21, p27 and p53 were different when comparing normal tissu… Show more

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(2 citation statements)
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“…Genotypically, changes related to p53 protein expression can be initially observed in PIA and accentuated in canine PC since the overexpression of this protein is associated with higher proliferative indices [ 36 ]. Furthermore, PIA samples also show down-regulation of phosphatase and tensin homolog (PTEN), the androgen receptor gene, and its protein levels [ 33 ].…”
Section: Preneoplastic Prostatic Lesionsmentioning
confidence: 99%
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“…Genotypically, changes related to p53 protein expression can be initially observed in PIA and accentuated in canine PC since the overexpression of this protein is associated with higher proliferative indices [ 36 ]. Furthermore, PIA samples also show down-regulation of phosphatase and tensin homolog (PTEN), the androgen receptor gene, and its protein levels [ 33 ].…”
Section: Preneoplastic Prostatic Lesionsmentioning
confidence: 99%
“…Despite exhibiting heterogeneous labeling for androgen receptors, basal cells in these lesions are believed to act in prostate tumor development with significant potential for proliferation [ 44 ]. Moreover, PIN exhibits an immunophenotype similar to PIA and canine PC with regard to cell cycle regulators [ 36 ], showing lower expression of TGF-β in epithelial cells and tissue stroma, referring to the impossibility of this cytokine to inhibit cell proliferation [ 45 ].…”
Section: Preneoplastic Prostatic Lesionsmentioning
confidence: 99%