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Vol. 63. Issue 1.
Pages 9-14 (January - February 2012)
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Vol. 63. Issue 1.
Pages 9-14 (January - February 2012)
Original article
Expression of p63 and p73 in Acoustic Neuroma and Its Possible Clinical Relevance
Expresión de p63 y p73 en neurinomas del acústico y estudio de su posible relevancia clínica
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Xabier Altunaa,
Corresponding author
xaltuna@osakidetza.net

Corresponding author.
, Jesús Algabaa, Weg Ongkekob
a Servicio de ORL, Hospital Donostia, San Sebastián, Guipúzcoa, Spain
b Department of Otolaryngology and Head and Neck Surgery, University of California, San Diego, San Diego, United States
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Table 1. Demographic Data of Patients.
Abstract
Objectives

Assess p63 and p73 expression in acoustic neuroma and its correlation with clinical and radiological findings.

Materials and methods

medical records of 34 patients who were operated on for acoustic neuroma during a 3-year period (2001–2003) were evaluated retrospectively. Immunohistochemical analysis of the schwannoma was performed with p63 and p73 antibodies and clinical patient characteristics were correlated with the immunoreactivity results.

Results

41% of the acoustic neuroma specimens showed p63 and p73 staining. Correlation between both proteins was 100%. Age of the patients tended to be older when staining was positive, but no statistical significance was achieved. Likewise, tumour size was bigger for positive tumours but, again, this difference was not statistically significant. There was no correlation between gender and immunostaining.

Discussion and conclusions

Expression of p63 and p73 was demonstrated in almost half of the patients studied. Although both proteins were more prevalent in older patients and bigger tumours, this difference was not statistically significant, probably due to the reduced sample size. No differences were found in laterality, gender or audiogram. However, the expression of these two proteins in almost half of the tumours shows that they can play a role in the development and progression of acoustic neuromas, although further studies are needed.

Keywords:
p63
p73
Immunohistochemistry
Acoustic neuroma
Schwannoma
Resumen
Objetivos

Determinar la expresión de p73 y p63 en muestras de neurinomas del acústico y estudiar su posible relevancia clínica.

Material y método

Se realiza un estudio retrospectivo de 34 neurinomas del acústico intervenidos durante un período de tres años (2001-2003). Se revisan sus historias clínicas y se realiza un estudio inmunohistoquímico para valorar la expresión de p63 y p73 en las muestras histológicas y la correlación con los hallazgos clínicos más relevantes.

Resultados

En el 41% de las muestras se observó una sobre-expresión de p63 y p73 siendo la correlación entre ambas proteínas del 100%. La edad de los pacientes con tinción positiva era mayor que la de los pacientes con tinción negativa sin llegar esta diferencia a ser estadísticamente significativa. El tamaño tumoral era mayor en los casos positivos, pero la diferencia tampoco ha llegado a niveles significativos. No existe correlación entre la expresión de los marcadores y el sexo, lado anatómico ni audiometría.

Discusión y conclusión

Se observa inmunotinción positiva para p63 y p73 en casi la mitad de los neurinomas estudiados. A pesar de encontrar que estas proteínas están más expresadas en casos de mayor edad y mayor tamaño, la diferencia no ha llegado a valores significativos, posiblemente por el número limitado de muestras en el análisis. Sin embargo, la expresión de estas proteínas en casi la mitad de los pacientes tratados, puede significar que juegan un papel en el desarrollo y progresión de estos tumores, aunque sería necesario realizar estudios futuros para determinar este papel.

Palabras clave:
p63
p73
Inmunihistoquímica
Neurinoma acústico
Schwannoma

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