No Evidence of Microsatellite Instability and Loss of Mismatch-Repair-Protein Expression in Squamous Cell Carcinoma of the Penis

Journal article


Publication Details

Author(s): Stoehr R, Wendler OD, Giedl J, Gaisa NT, Richter G, Campean V, Burger M, Wullich B, Bertz S, Hartmann A
Journal: Pathobiology
Publication year: 2019
Volume: 86
Journal issue: 2-3
Pages range: 145-151
ISSN: 1015-2008


Abstract

Objective: Microsatellite instability (MSI) and a defective mismatch repair (MMR) system were described as beneficial tumor features for response to immune checkpoint therapy (PD-1 blockade). Meanwhile, the FDA approved PD-1/PD-L1 inhibition treatment for any solid tumor showing MSI and/or defects in the MMR system. For squamous cell carcinoma (SCC) of the penis, no data on the frequency of MSI and altered MMR protein expression are available to date. Therefore, we investigated the MSI status and the expression of MMR proteins in a large cohort of penile SCCs. Methods: The MSI status of 105 archival formalin-fixed, paraffin-embedded penile SCCs was analyzed using the 5 markers of the NCI consensus panel for MIS testing (BAT25, 26, D2S123, D17S250, and D5S346), or, in cases without representative nontumorous tissue using a validated panel of 5 quasimonomorphic mononucleotide repeat markers (BAT 25, 26 and NR21, 24, 27). The expression of the MMR proteins MLH1, MSH2, MSH6, and PMS2 was analyzed using immunohistochemistry and a tissue microarray of a subset of penile SCCs from our cohort (n = 75). Results: Overall, in 96/105 cases, at least 4 microsatellite markers gave interpretable results. None of the cases showed MSI. Immunohistochemistry for MMR proteins was analyzable in 70/75 cases. All cases showed a regular expression of the MMR proteins. Conclusion: MSI and defects in MMR protein expression are not regular features of penile SCC and might not act as biomarkers for PD-1/PD-L1 blockade therapy in penile carcinoma.


FAU Authors / FAU Editors

Bertz, Simone PD Dr.
Pathologisches Institut
Hartmann, Arndt Prof. Dr. med.
Lehrstuhl für Allgemeine Pathologie und Pathologische Anatomie
Wullich, Bernd Prof. Dr.
Lehrstuhl für Urologie


External institutions with authors

Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen
Universität Regensburg


How to cite

APA:
Stoehr, R., Wendler, O.D., Giedl, J., Gaisa, N.T., Richter, G., Campean, V.,... Hartmann, A. (2019). No Evidence of Microsatellite Instability and Loss of Mismatch-Repair-Protein Expression in Squamous Cell Carcinoma of the Penis. Pathobiology, 86(2-3), 145-151. https://dx.doi.org/10.1159/000495251

MLA:
Stoehr, Robert, et al. "No Evidence of Microsatellite Instability and Loss of Mismatch-Repair-Protein Expression in Squamous Cell Carcinoma of the Penis." Pathobiology 86.2-3 (2019): 145-151.

BibTeX: 

Last updated on 2019-21-06 at 12:23

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