Open Access

Immunohistochemical expression of TROP‑2 (TACSTD2) on the urothelial carcinoma of the urinary bladder and other types of cancer

  • Authors:
    • Mahmoud Abbas
    • Barbara Heitplatz
    • Christof Bernemann
    • Martin Boegemann
    • Marcel Trautmann
    • Andres Jan Schrader
    • Eva Wardelmann
    • Katrin Schlack
  • View Affiliations

  • Published online on: October 23, 2023     https://doi.org/10.3892/ol.2023.14114
  • Article Number: 527
  • Copyright: © Abbas et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

In metastatic or locally advanced urothelial carcinoma (UC), therapeutic options have been limited to chemotherapy and immune checkpoint inhibitors. Novel targets and drugs such as antibody drug conjugates have been developed, and enfortumab vedotin targeting nectin‑4 and sacituzumab govitecan (SG) targeting trophoblast cell surface antigen 2 (TROP‑2), the protein product of the TACSTD2 gene, have been approved. The expression of TROP‑2 was investigated within UC and other types of carcinomas, and within the tissue of different healthy organs to understand treatment responses and toxicities. The expression of TROP‑2 in the tissues of 42 patients with UC, 13 patients with other types of cancer and in the normal tissues of 11 patients was retrospectively analyzed. Immunohistochemical staining of the TROP‑2 protein was performed on a BenchMark ULTRA IHC/ISH System (Roche Tissue Diagnostics; Roche Diagnostics, Ltd.) according to accredited staining protocols in a routine immunohistochemistry accredited and certified facility of the laboratory of immunohistochemistry at the Institute of Pathology (Gerhard‑Domagk Institute)‑ University Hospital Muenster (UKM)‑Muenster‑Germany]. Different expression levels of TROP‑2 were observed, and the highest expression rate of TROP‑2 was observed in UC, independent of the tumor stage. However, normal urothelial cells had similar expression levels. Except for ductal carcinoma in situ, the expression of TROP‑2 was reduced in other types of cancer and in the healthy tissues from other organs, including pancreas, gall bladder, colon and prostate. Given the treatment response based on the expression level of TROP‑2, SG would be effective in almost all cases of UC. However, it would also have an effect on the normal urothelium.
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December-2023
Volume 26 Issue 6

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Spandidos Publications style
Abbas M, Heitplatz B, Bernemann C, Boegemann M, Trautmann M, Schrader AJ, Wardelmann E and Schlack K: Immunohistochemical expression of TROP‑2 (TACSTD2) on the urothelial carcinoma of the urinary bladder and other types of cancer. Oncol Lett 26: 527, 2023
APA
Abbas, M., Heitplatz, B., Bernemann, C., Boegemann, M., Trautmann, M., Schrader, A.J. ... Schlack, K. (2023). Immunohistochemical expression of TROP‑2 (TACSTD2) on the urothelial carcinoma of the urinary bladder and other types of cancer. Oncology Letters, 26, 527. https://doi.org/10.3892/ol.2023.14114
MLA
Abbas, M., Heitplatz, B., Bernemann, C., Boegemann, M., Trautmann, M., Schrader, A. J., Wardelmann, E., Schlack, K."Immunohistochemical expression of TROP‑2 (TACSTD2) on the urothelial carcinoma of the urinary bladder and other types of cancer". Oncology Letters 26.6 (2023): 527.
Chicago
Abbas, M., Heitplatz, B., Bernemann, C., Boegemann, M., Trautmann, M., Schrader, A. J., Wardelmann, E., Schlack, K."Immunohistochemical expression of TROP‑2 (TACSTD2) on the urothelial carcinoma of the urinary bladder and other types of cancer". Oncology Letters 26, no. 6 (2023): 527. https://doi.org/10.3892/ol.2023.14114