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Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma

  • Authors:
    • Britta Janina Wagner
    • Patrick Sven Plum
    • Katharina Apel
    • Marie Scherer
    • Denise Buchner
    • Sebastian Brinkmann
    • Reinhard Buettner
    • Dirk Stippel
    • Alexander Quaas
    • Uta Drebber
  • View Affiliations / Copyright

    Affiliations: Institute of Pathology, University of Cologne, Faculty of Medicine and University Hospital Cologne, D‑50937 Cologne, Germany, Department of General, Visceral, Cancer and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne, D‑50937 Cologne, Germany
    Copyright: © Wagner et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 349
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    Published online on: March 3, 2021
       https://doi.org/10.3892/ol.2021.12610
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Abstract

Cholangiocarcinoma (CCA) is an aggressive malignancy with a 5‑year‑survival rate of <10%, mainly due to diagnosis in advanced stages and limited therapeutic options in case of progressive disease. Recently, evidence has indicated that alterations in the SWI/SNF‑complex (SWI/SNF) may have an important role in the tumorigenesis of CCA. SWI/SNF‑related chromatin remodeling has been reported to be crucial for differentiation and tumor suppression, and loss‑of‑function mutations of SWI/SNF are present in 20% of human malignancies; however, at present, little is known about its relevance in CCA. In the present study, a cohort of 52 patients with the diagnosis of primary CCA was retrospectively collected. All patients underwent surgery with curative intent. Tissue microarray analysis was performed on each tumor for immunohistochemical loss‑of‑protein analysis of the SWI/SNF core subunits ARID1A, INI‑1, BRG1, PBRM‑1 and BRM, corresponding to the following CCA subtypes: Extrahepatic CCA (ECCA), small duct or large duct intrahepatic CCA (ICCA). Kaplan‑Meier analysis was used to determine survival distribution and survival differences were evaluated by log‑rank test. In total, 14 of 52 patients (~35%) exhibited protein‑loss of any tested SWI/SNF core subunit. Notably, 17% of patients exhibited a loss of ARID1a; this was the protein loss with the highest frequency. Patients with small and large duct ICCA with protein‑loss of any tested SWI/SNF subunit exhibited significantly worse survival compared with the wild‑type cohort with proficient protein expression (P=0.013 and P=0.002), whereas no significant survival difference was detected for patients with ECCA. SWI/SNF and its core subunits may be considered promising predictive and therapeutic targets, and require further investigation in patients with CCA.
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Copy and paste a formatted citation
Spandidos Publications style
Wagner BJ, Plum PS, Apel K, Scherer M, Buchner D, Brinkmann S, Buettner R, Stippel D, Quaas A, Drebber U, Drebber U, et al: Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma. Oncol Lett 21: 349, 2021.
APA
Wagner, B.J., Plum, P.S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S. ... Drebber, U. (2021). Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma. Oncology Letters, 21, 349. https://doi.org/10.3892/ol.2021.12610
MLA
Wagner, B. J., Plum, P. S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S., Buettner, R., Stippel, D., Quaas, A., Drebber, U."Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma". Oncology Letters 21.5 (2021): 349.
Chicago
Wagner, B. J., Plum, P. S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S., Buettner, R., Stippel, D., Quaas, A., Drebber, U."Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma". Oncology Letters 21, no. 5 (2021): 349. https://doi.org/10.3892/ol.2021.12610
Copy and paste a formatted citation
x
Spandidos Publications style
Wagner BJ, Plum PS, Apel K, Scherer M, Buchner D, Brinkmann S, Buettner R, Stippel D, Quaas A, Drebber U, Drebber U, et al: Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma. Oncol Lett 21: 349, 2021.
APA
Wagner, B.J., Plum, P.S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S. ... Drebber, U. (2021). Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma. Oncology Letters, 21, 349. https://doi.org/10.3892/ol.2021.12610
MLA
Wagner, B. J., Plum, P. S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S., Buettner, R., Stippel, D., Quaas, A., Drebber, U."Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma". Oncology Letters 21.5 (2021): 349.
Chicago
Wagner, B. J., Plum, P. S., Apel, K., Scherer, M., Buchner, D., Brinkmann, S., Buettner, R., Stippel, D., Quaas, A., Drebber, U."Protein‑loss of SWI/SNF‑complex core subunits influences prognosis dependent on histological subtypes of intra‑ and extrahepatic cholangiocarcinoma". Oncology Letters 21, no. 5 (2021): 349. https://doi.org/10.3892/ol.2021.12610
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