OBJECTIVE: Currently a possible interaction between insulin signaling and cell-pathophysiology of prostate cancer (PC) is discussed. Potentially, PC progression may be associated with metabolic signaling and different in patients with diabetes. The aim of this study was to research tissue expressions of the androgen receptor (AR), PTEN and Ki-67 in patients with PC or benign prostate hyperplasia (BPH) and to evaluate possible correlations to PSA serum levels, pathologic stage, PC risk score under consideration of BMI, diabetes and hyperglycemia. MATERIAL AND METHODS: We collected data of patients affected by PC or BPH who underwent surgery at the department of Urology of the University of Tuebingen from 2004 to 2011. Two patient collectives were built, one with and one without diabetes mellitus. Paraffine tissues were constructed to a tissue microarray and slides were stained immunohistochemically for PTEN, AR and Ki-67, respectively. Expressions were correlated to clinical data. RESULTS: In the final cohort median age was 71 years, median BMI was 27.13 kg/m2, median fasting blood glucose was 121.75 and median PSA was 7.08. Fifty-seven (32.7%) patients had diabetes (17 in the PC and 40 in the BPH group). We found a statistically significant higher rate of PTEN loss in patients with PC compared to the BPH group, in patients with PSA levels above 10 ng/ml, with invasion of seminal vesicles, with high-risk PCa (all p<0.05), Gleason score ≥8, pathological stage T3a or T3b (p = 0.03). At the linear regression, fasting blood glucose was inversely associated with AR expression (r= -5.32 p<0.05) but not associated with Ki-67 or PTEN expression. We found that fasting blood glucose ≥120 mg/dl was associated with lower AR gene expression (OR: 0.55 [95% CI 0.32-0.94], p<0.05) and greater risk of PTEN loss (OR: 1.79 [95%CI 0.99-4.13], p<0.05). PTEN loss was also significant associated with PSA >10 ng/ml (OR: 9.21 [95%CI 1.20-70.20]; p<0.05) and high-risk PCa (OR: 15.62 [95%CI 6.22-39.22], p<0.05). CONCLUSION: In the present study, protein expression of AR and PTEN are altered and associated with poor diabetes mellitus control in PC patients. Based on these results, we hypothesize a crosslinking between hyperglycemia, androgen signaling and PTEN alteration, which may lead with a worse cancer progression. Restoring the function of glucose metabolism in PC is an unmet clinical need that should be further investigated.
OBIETTIVO: Attualmente viene discussa una possibile interazione tra segnalazione di insulina e fisiopatologia cellulare del carcinoma prostatico (PC). Potenzialmente, la progressione del PC può essere associata alla segnalazione metabolica e diversa nei pazienti con diabete. Lo scopo di questo studio era di ricercare le espressioni tissutali del recettore degli androgeni (AR), PTEN e Ki-67 in pazienti con PC o iperplasia prostatica benigna (BPH) e valutare possibili correlazioni con i livelli sierici di PSA, lo stadio patologico, il punteggio di rischio del PC in considerazione di BMI, diabete e iperglicemia. MATERIALI E METODI: abbiamo raccolto i dati dei pazienti affetti da PC o BPH sottoposti a intervento chirurgico presso il dipartimento di urologia dell'Università di Tubinga dal 2004 al 2011. Sono stati costruiti due collettivi di pazienti, uno con e uno senza diabete mellito. I tessuti di paraffina sono stati costruiti su un microarray di tessuti e i vetrini sono stati colorati immunoistochimicamente per PTEN, AR e Ki-67, rispettivamente. Le espressioni erano correlate ai dati clinici. RISULTATI: nell'ultima coorte l'età media era di 71 anni, l'IMC mediano era di 27,13 kg / m2, la glicemia a digiuno mediana era di 121,75 e il PSA mediano di 7,08. Cinquantasette (32,7%) pazienti avevano il diabete (17 nel PC e 40 nel gruppo BPH). Abbiamo trovato un tasso statisticamente significativo più alto di perdita di PTEN nei pazienti con PC rispetto al gruppo BPH, in pazienti con livelli di PSA superiori a 10 ng / ml, con invasione di vescicole seminali, con PCa ad alto rischio (tutte p <0,05), Gleason punteggio ≥8, stadio patologico T3a o T3b (p = 0,03). Alla regressione lineare, la glicemia a digiuno era inversamente associata all'espressione di AR (r = -5,32 p <0,05) ma non associata all'espressione di Ki-67 o PTEN. Abbiamo scoperto che la glicemia a digiuno ≥120 mg / dl era associata a una minore espressione del gene AR (OR: 0,55 [IC 95% 0,32-0,94], p <0,05) e un maggiore rischio di perdita di PTEN (OR: 1,79 [IC 95% 0,99 -4,13], p <0,05). La perdita di PTEN era anche significativa associata a PSA> 10 ng / ml (OR: 9,21 [IC 95% 1,20-70,20]; p <0,05) e PCa ad alto rischio (OR: 15,62 [IC 95% 6,22-39,22], p < 0.05). CONCLUSIONE: Nel presente studio, l'espressione proteica di AR e PTEN è alterata e associata a scarso controllo del diabete mellito nei pazienti con PC. Sulla base di questi risultati, ipotizziamo una reticolazione tra iperglicemia, segnalazione di androgeni e alterazione del PTEN, che può portare a una peggiore progressione del cancro. Ripristinare la funzione del metabolismo del glucosio nel PC è un'esigenza clinica insoddisfatta che dovrebbe essere ulteriormente studiata.
Espressione proteica del recettore degli androgeni (AR), PSA, PTEN e Ki-67 in pazienti con carcinoma prostatico e diabete mellito: analisi mediante un test di microarray tissutale / Russo, GIORGIO IVAN. - (2020 Jan 20).
Espressione proteica del recettore degli androgeni (AR), PSA, PTEN e Ki-67 in pazienti con carcinoma prostatico e diabete mellito: analisi mediante un test di microarray tissutale.
RUSSO, GIORGIO IVAN
2020-01-20
Abstract
OBJECTIVE: Currently a possible interaction between insulin signaling and cell-pathophysiology of prostate cancer (PC) is discussed. Potentially, PC progression may be associated with metabolic signaling and different in patients with diabetes. The aim of this study was to research tissue expressions of the androgen receptor (AR), PTEN and Ki-67 in patients with PC or benign prostate hyperplasia (BPH) and to evaluate possible correlations to PSA serum levels, pathologic stage, PC risk score under consideration of BMI, diabetes and hyperglycemia. MATERIAL AND METHODS: We collected data of patients affected by PC or BPH who underwent surgery at the department of Urology of the University of Tuebingen from 2004 to 2011. Two patient collectives were built, one with and one without diabetes mellitus. Paraffine tissues were constructed to a tissue microarray and slides were stained immunohistochemically for PTEN, AR and Ki-67, respectively. Expressions were correlated to clinical data. RESULTS: In the final cohort median age was 71 years, median BMI was 27.13 kg/m2, median fasting blood glucose was 121.75 and median PSA was 7.08. Fifty-seven (32.7%) patients had diabetes (17 in the PC and 40 in the BPH group). We found a statistically significant higher rate of PTEN loss in patients with PC compared to the BPH group, in patients with PSA levels above 10 ng/ml, with invasion of seminal vesicles, with high-risk PCa (all p<0.05), Gleason score ≥8, pathological stage T3a or T3b (p = 0.03). At the linear regression, fasting blood glucose was inversely associated with AR expression (r= -5.32 p<0.05) but not associated with Ki-67 or PTEN expression. We found that fasting blood glucose ≥120 mg/dl was associated with lower AR gene expression (OR: 0.55 [95% CI 0.32-0.94], p<0.05) and greater risk of PTEN loss (OR: 1.79 [95%CI 0.99-4.13], p<0.05). PTEN loss was also significant associated with PSA >10 ng/ml (OR: 9.21 [95%CI 1.20-70.20]; p<0.05) and high-risk PCa (OR: 15.62 [95%CI 6.22-39.22], p<0.05). CONCLUSION: In the present study, protein expression of AR and PTEN are altered and associated with poor diabetes mellitus control in PC patients. Based on these results, we hypothesize a crosslinking between hyperglycemia, androgen signaling and PTEN alteration, which may lead with a worse cancer progression. Restoring the function of glucose metabolism in PC is an unmet clinical need that should be further investigated.File | Dimensione | Formato | |
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