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Article Open Access

P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma

  • Authors:
    • Yucai Wu
    • Yiji Peng
    • Bao Guan
    • Anbang He
    • Kunlin Yang
    • Shiming He
    • Yanqing Gong
    • Xuesong Li
    • Liqun Zhou
  • View Affiliations / Copyright

    Affiliations: Department of Urology, Peking University First Hospital, Xicheng, Beijing 100034, P.R. China
    Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 95
    |
    Published online on: December 6, 2020
       https://doi.org/10.3892/ol.2020.12356
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Abstract

Prolyl 4‑hydroxylase, beta polypeptide (P4HB) protein is an endoplasmic reticulum (ER) molecular chaperone protein and has been reported to be overexpressed in multiple tumor types. However, the role of P4HB in bladder cancer (BLCA) has not yet been elucidated. The aim of the present study was to investigate the prognostic value of P4HB and the association between clinicopathological characteristics and P4HB in BLCA. P4HB expression levels were assessed through The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases, and validated by reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) and western blot analysis in BLCA tissues and cells. A total of 69 pairs of tumor and normal samples were used to analyze the expression of P4HB via immunohistochemical staining. A co‑expression network and functional enrichment analyses were conducted to investigate the biological function of P4HB in BLCA. The protein‑protein interaction (PPI) network was constructed by Search Tool for the Retrieval of Interacting Genes. The results showed that P4HB was highly expressed in BLCA cells and tissues. The area under the curve value for P4HB expression to discriminate between tumor and normal tissues was up to 0.888 (95% CI: 0.801‑0.975; P<0.001) and 0.881 (95% CI: 0.825‑0.937; P<0.001) in TCGA database and our database, respectively. Furthermore, the expression level of P4HB was an independent risk factor for overall survival (OS) and recurrence‑free survival (RFS) by univariate and multivariate analyses. Kaplan‑Meier survival analysis demonstrated that high P4HB expression was associated with low OS and RFS. Pathway enrichment analysis suggested that P4HB was involved in protein processing in the endoplasmic reticulum (ER), including N‑glycan modification and protein metabolic processes responding to ER stress. PPI analysis revealed that the potential targets of P4HB were mainly involved in posttranslational protein modification and response to ER stress. In conclusion, the expression level of P4HB aid in identifying patients with early‑stage BLCA and predicting the prognosis of BLCA. Therefore, P4HB may be a novel diagnostic and prognostic biomarker for BLCA.
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Copy and paste a formatted citation
Spandidos Publications style
Wu Y, Peng Y, Guan B, He A, Yang K, He S, Gong Y, Li X and Zhou L: P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma. Oncol Lett 21: 95, 2021.
APA
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S. ... Zhou, L. (2021). P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma. Oncology Letters, 21, 95. https://doi.org/10.3892/ol.2020.12356
MLA
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S., Gong, Y., Li, X., Zhou, L."P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma". Oncology Letters 21.2 (2021): 95.
Chicago
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S., Gong, Y., Li, X., Zhou, L."P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma". Oncology Letters 21, no. 2 (2021): 95. https://doi.org/10.3892/ol.2020.12356
Copy and paste a formatted citation
x
Spandidos Publications style
Wu Y, Peng Y, Guan B, He A, Yang K, He S, Gong Y, Li X and Zhou L: P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma. Oncol Lett 21: 95, 2021.
APA
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S. ... Zhou, L. (2021). P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma. Oncology Letters, 21, 95. https://doi.org/10.3892/ol.2020.12356
MLA
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S., Gong, Y., Li, X., Zhou, L."P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma". Oncology Letters 21.2 (2021): 95.
Chicago
Wu, Y., Peng, Y., Guan, B., He, A., Yang, K., He, S., Gong, Y., Li, X., Zhou, L."P4HB: A novel diagnostic and prognostic biomarker for bladder carcinoma". Oncology Letters 21, no. 2 (2021): 95. https://doi.org/10.3892/ol.2020.12356
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