Abstract
Purpose
Markers are needed to increase the diagnostic accuracy of prostate-specific antigen (PSA) in prostate cancer (PCa) screening. Mounting evidence has shown that plasma proteins can be hopeful biomarkers for cancer diagnosis.
Methods
Tandem mass tag (TMT)-based proteomics and parallel reaction monitoring (PRM) analysis were used to screen the differential proteins and further validated in other independent studies (n = 539). Receiver-operating characteristic (ROC), decision curves and nomograms were applied to assess the diagnostic accuracy of biomarkers.
Results
Three candidate proteins (DBP, LCAT and ORM2) were preliminarily screened. Subsequent validation studies revealed significant upregulation of ORM2 in PCa patients across other independent cohorts. ORM2 yielded excellent discriminative power for PCa from benign prostatic hyperplasia (BPH) patients (AUC = 0.861 and 0.814 in validation phases 2a and 2b, respectively). Importantly, the combination of ORM2 and PSA gave better predictive accuracy than PSA alone. We incorporated age, PSA and ORM2 into a nomogram, which yielded C-index of 0.883 in validation phase 2a. A similar C-index of 0.879 was obtained in external validation phase 2b.
Conclusions
In summary, our study suggests that ORM2 could be treated as a complementary biomarker for PSA in distinguishing PCa from BPH.
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Data availability statement
The data used and/or analyzed in this study are available on request from the corresponding author.
Abbreviations
- PSA:
-
Prostate-specific antigen
- PCa:
-
Prostate cancer
- TMT:
-
Tandem mass tag
- PRM:
-
Parallel reaction monitoring
- ROC:
-
Receiver-operating characteristic
- BPH:
-
Benign prostatic hyperplasia
- ELISA:
-
Enzyme-linked immunosorbent assay
- TRUS:
-
Transrectal ultrasound
- DRE:
-
Digital rectal examination
- MRI:
-
Magnetic resonance imaging
- TTAH:
-
The Third Affiliated Hospital of Soochow University
- YPH:
-
Yixing People’s Hospital
- AGC:
-
Automatic gain control
- HCD:
-
Higher energy collisional dissociation
- AUC:
-
The area under the curve
- 95% CI:
-
95% Confidence interval
- DCA:
-
Decision curve analysis
- PCA:
-
Principal component analysis
- ORM2:
-
Orosomucoid 2
- PDAC:
-
Pancreatic ductal adenocarcinoma
- THBS2:
-
Plasma protein thrombospondin-2
- AFP:
-
Alpha-fetoprotein
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Funding
This work was supported by the Natural Science Foundation of Jiangsu Province (BK20190600; BK20190555), National Natural Science Foundation of China (81903390; 81802880), Huai’an City Science and Technology Project (HAB202051), and the Youth Talent Science and Technology Project of Changzhou Health Commission (QN202110).
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Study conception and design: GM, XY, LC, QW, and YG. Acquisition of data: BX, HC, WJ, XL, YF, and QO. Analysis and interpretation of data: YG and QO. Drafting of the manuscript: YG. Critical revision for important intellectual content: QW, BX, GM, and XY. Obtained funding: GM, YG, QS, and QY. Administrative, technical or material support: QY and YS. Study supervision: GM. Final approval of the manuscript: all the authors.
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This study was approved by the Institutional Review Board of each participating institution. All the participants provided their informed consent to participate.
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Ge, Y., Xu, B., Cai, H. et al. Diagnostic role of plasma ORM2 in differentiating prostate cancer from benign prostatic hyperplasia. J Cancer Res Clin Oncol 149, 2301–2310 (2023). https://doi.org/10.1007/s00432-022-04380-9
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DOI: https://doi.org/10.1007/s00432-022-04380-9