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Virchows Archiv

, Volume 473, Issue 5, pp 607–614 | Cite as

Nuclear loss and cytoplasmic expression of androgen receptor in penile carcinomas: role as a driver event and as a prognosis factor

  • Hellen Kuasne
  • Mateus C. Barros-Filho
  • Fábio A. Marchi
  • Sandra A. Drigo
  • Cristovam Scapulatempo-Neto
  • Eliney F. Faria
  • Silvia R. Rogatto
Original Article
  • 80 Downloads

Abstract

Androgen receptor (AR) is a member of the steroid and nuclear family receptor that acts as transcription factor. AR signaling plays pivotal role in the development and progression of prostate cancer. However, the role of AR in penile cancer (PeCa) is poorly explored. Our previous molecular studies unveiled frequent AR mRNA loss in PeCa, which was further predicted as a major driver alteration in this neoplasm. Herein, we assessed the AR protein expression in 59 usual PeCa tissues and 42 surrounding normal tissues (SNT) by immunohistochemistry using a tissue microarray. In a paired analysis, we found a total absence of nuclear AR expression in PeCa while 95.2% of SNT samples presented strong nuclear AR expression (P < 0.001). Interestingly, 17 of 42 PeCa presented weak or moderate cytoplasmic AR staining, contrasting with 5 of 42 SNT (P = 0.008). Increased levels of AR cytoplasmic expression were related with poor prognosis features including advanced clinical staging (P = 0.044), compromised surgical margins (P = 0.005), and pathological inguinal node status (P = 0.047). Furthermore, AR cytoplasmic expression was also related with shorter overall survival (P = 0.032). In conclusion, the frequent loss of nuclear AR protein levels suggests a potential function in PeCa development. Based on this result, the androgen deprivation therapy is not indicated for PeCa patients. In addition, the AR cytoplasmic expression found in a significant number of cases (40.5%) showed prognostic value and pathways activated by the non-genomic AR signaling may represent a promising therapeutic strategy.

Keywords

Penile carcinoma Androgen receptor Cytoplasmic AR expression Immunohistochemistry 

Notes

Acknowledgments

The authors would like to acknowledge Barretos Cancer Hospital, SP, for providing human specimens. We are also grateful to the Pathology Department of Barretos Cancer Hospital, SP, for TMA construction and analysis.

Compliance with ethical standards

The Institutional Human Research Ethics Committee (Barretos Cancer Hospital) approved the study (Protocol 363-2010).

Informed consent

Written informed consent was obtained from all patients.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Hellen Kuasne
    • 1
    • 2
  • Mateus C. Barros-Filho
    • 2
  • Fábio A. Marchi
    • 2
  • Sandra A. Drigo
    • 3
  • Cristovam Scapulatempo-Neto
    • 4
  • Eliney F. Faria
    • 5
  • Silvia R. Rogatto
    • 6
  1. 1.Department of Urology, Faculty of MedicineSão Paulo State University – UNESPBotucatuBrazil
  2. 2.CIPE - A.C. Camargo Cancer CenterSão PauloBrazil
  3. 3.Department of Surgery and Orthopedics and Department of Veterinary ClinicSchool of Veterinary Medicine and Animal Science, UNESPBotucatuBrazil
  4. 4.Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos and Diagnósticos da América (DASA)São PauloBrazil
  5. 5.Department of UrologyBarretos Cancer HospitalBarretosBrazil
  6. 6.Department of Clinical Genetics, Vejle Hospital, Institute of Regional Health ResearchUniversity of Southern DenmarkVejleDenmark

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