Clinical significance of prostatic exosomal protein and PSA in detecting prostate cancer with the PSA gray zone and PI-RADS-3 lesions
10.13263/j.cnki.nja.2024.07.003
- VernacularTitle:前列腺小体外泄蛋白联合PSA在PSA"灰区"且PI-RADS评分3分前列腺癌诊断中的临床意义
- Author:
Yi-Yang LIU
1
;
Xing-Jun MAO
;
Jia-Dong XIA
Author Information
1. 南京医科大学第一附属医院泌尿外科,江苏 南京 210029
- Keywords:
prostate cancer;
prostatic exosomal protein;
f/tPSA;
Prostate Imaging Reporting and Data System category 3
- From:
National Journal of Andrology
2024;30(7):597-603
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the clinical value of prostatic exosomal protein(PSEP)and PSA in the diagnosis of PCa with PSA in the gray zone(4-10 μg/L)and Prostate Imaging Reporting and Data System category3(PI-RADS-3)lesions.Meth-ods:From 2019 to 2022,211 patients with the PSA gray zone and PI-RADS-3 lesions underwent prostate multi-parameter MRI,pros-tate needle biopsy or transurethral resection/enucleation of the prostate.We collected the baseline urine samples from the patients,ex-amined the content of PSEP in the urine by ELISA and evaluated the performance of PSEP and PSA in the diagnosis of PCa.Re-sults:Among the total number of patients,57 were confirmed with PCa(the positive group)and the other 154 with benign prostate conditions(the negative group)by biopsy pathology.The free PSA level(fPSA),free to total PSA ratio(f/tPSA)and PSEP content were dramatically lower in the positive than in the negative group(all P<0.01).Uni-and multivariate analyses showed f/tPSA and PSEP to be independent factors for predicting PCa with the PSA gray zone and PI-RADS-3 lesions,with the AUC values of 0.70 and 0.78,best cutoff values of 0.18 and 1.45 μg/L,sensitivity of 84.21%and 70.18%,and specificity of 58.44%and 77.27%,re-spectively(P<0.01).The multivariate model with combined use of f/tPSA and PSEP(AUC:0.82,best cutoff value:0.31,sensi-tivity:82.46%,specificity:75.32%)outperformed either f/tPSA or PSEP alone in the diagnosis of PCa with the PSA gray zone and PI-RADS-3 lesions(P<0.01,P=0.04).Conclusion:For patients with the PSA gray zone and PI-RADS-3 lesions,f/tPSA and PSEP are significant predictors of PCa.The multivariate model of PSEP combined with f/tPSA can replace f/tPSA in the detection of PCa to improve diagnostic performance and avoid unnecessary prostate biopsy.
