Volume 36, Issue 11 pp. 1596-1603
Original Article

Expression of sex hormone receptors in juvenile angiofibromas and antiproliferative effects of receptor modulators

Bernhard Schick MD

Corresponding Author

Bernhard Schick MD

Department of Otorhinolaryngology, Saarland University Medical Center, Homburg/Saar, Germany

Corresponding author: B. Schick, Department of Otorhinolaryngology, Saarland University Medical Center, Kirrberger Strasse, Building no. 6, D-66421 Homburg/Saar, Germany. E-mail: [email protected]Search for more papers by this author
Julia Dlugaiczyk MD

Julia Dlugaiczyk MD

Department of Otorhinolaryngology, Saarland University Medical Center, Homburg/Saar, Germany

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Olaf Wendler PhD

Olaf Wendler PhD

Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Erlangen, Erlangen, Germany

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First published: 30 August 2013
Citations: 19

Abstract

Background

Predilection of juvenile angiofibromas in adolescent boys has prompted the hypothesis of hormone-dependent tumor growth. However, knowledge on expression and function of sex hormone receptors in juvenile angiofibromas is still sparse and inconsistent.

Methods

Transcript and protein expression of sex hormone receptors in juvenile angiofibromas was studied by quantitative reverse transcriptase–polymerase chain reaction (qRT-PCR) and immunohistology/fluorescence. A bromodeoxyuridine assay was used to assess the antiproliferative effects of flutamide (androgen receptor antagonist) and tamoxifen (estrogen receptor modulator).

Results

Significantly increased transcript levels were observed for androgen receptor, estrogen receptor α, follicle-stimulating hormone receptor, and luteinizing hormone receptor in juvenile angiofibromas versus the stroma of nasal mucosa. Estrogen receptor β and progesterone receptor mRNA levels were low and similar for both tissues. Estrogen receptor α protein was detected in juvenile angiofibroma tumors and mesenchymal cell lines. Flutamide and tamoxifen inhibited proliferation of cultured juvenile angiofibroma mesenchymal cells.

Conclusion

These findings contribute to the understanding of juvenile angiofibroma pathophysiology and offer novel therapeutic options. © 2014 Wiley Periodicals, Inc. Head Neck 36: 1596–1603, 2014

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