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. 2022 May 21;14(10):2535.
doi: 10.3390/cancers14102535.

DJ-1 Expression Might Serve as a Biologic Marker in Patients with Bladder Cancer

Affiliations

DJ-1 Expression Might Serve as a Biologic Marker in Patients with Bladder Cancer

Shuhei Hirano et al. Cancers (Basel). .

Abstract

The overexpression of DJ-1 protein and its secretion into the bloodstream has been reported in various neoplasms. However, serum levels and the subcellular localization of DJ-1 have not been analyzed in detail in bladder cancer (BC). Our comprehensive analysis of these variables started with the measurement of DJ-1 in serum from 172 patients with BC, 20 patients with urolithiasis and 100 healthy participants. Next, an immunohistochemical study of DJ-1 expression and localization was conducted in 92 patients with BC, and associations with clinicopathologic factors and patient outcomes were evaluated. Serum DJ-1 was significantly higher in patients with BC than in those with urolithiasis or in healthy participants. Immunohistochemically, a cytoplasm-positive (Cy+) and nucleus-negative (N-) DJ-1 pattern was associated with age and pathologic stage. Log-rank tests indicated that the Cy+, N- pattern was significantly associated with overall survival (OS), recurrence-free survival (RFS), and cancer specific survival (CSS). In addition, the Cy+, N- pattern was an independent prognostic factor in the multivariate analysis adjusted for the effects of the clinicopathologic outcomes. The investigation of DJ-1 expression might help physicians to make decisions regarding further follow-up and additional treatments.

Keywords: DJ-1; bladder cancer; cystectomy; serum; urothelial carcinoma.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

Figures

Figure 1
Figure 1
Serum concentrations of DJ-1 protein by reverse-phase protein array analysis (A) in patients with bladder cancer or urolithiasis and in healthy participants, and (B) in patients with non-muscle-invasive bladder cancer and muscle-invasive bladder cancer.
Figure 2
Figure 2
Receiver operating characteristic analysis of preoperative serum concentrations of DJ-1 for the detection of bladder cancer in (A) patients with bladder cancer compared with healthy participants, (B) patients with bladder cancer compared with patients with urolithiasis, and (C) patients with Ta/1 bladder cancer compared with healthy participants. AUC = area under the curve.
Figure 3
Figure 3
DJ-1 expression patterns in non-neoplastic urothelial cells and urothelial carcinoma. (A) Nuclear staining observed in non-neoplastic urothelial cells. (B) Cytoplasm-positive, nucleus-negative: Group 1. (C) Cytoplasm-positive, nucleus-positive: Group 2. (D) Cytoplasm-negative, nucleus-positive: Group 3. (E) Cytoplasm-negative, nucleus-negative: Group 4. All 400× original magnification.
Figure 4
Figure 4
Probability of (A) overall survival and (B) cancer-specific survival after radical cystectomy by DJ-1 expression group. Group 1—cytoplasm-positive, nucleus-negative; Group 2—cytoplasm-positive, nucleus-positive; Group 3—cytoplasm-negative, nucleus-positive; Group 4—cytoplasm-negative, nucleus-negative.
Figure 5
Figure 5
Probability of (A) overall survival, (B) recurrence-free survival, and (C) cancer-specific survival after radical cystectomy for Group 1 and Group 2–4. Group 1—cytoplasm-positive, nucleus-negative; Group 2—cytoplasm-positive, nucleus-positive; Group 3—cytoplasm-negative, nucleus-positive; Group 4—cytoplasm-negative, nucleus-negative.

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