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Archives of Gynecology and Obstetrics

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01.08.2011 | Gynecologic Oncology

Inhibin-βA subunit immunolabeling as a prognostic factor in endometrioid adenocarcinomas: a matter of evaluation?

verfasst von: Ioannis Mylonas

Erschienen in: Archives of Gynecology and Obstetrics | Ausgabe 2/2011

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Abstract

Introduction

Inhibins and activins are secreted polypeptides of the transforming growth factor-β superfamily that comprise a subfamily of dimeric, disulphide-linked proteins. Inhibins are composed of an alpha subunit and one of two possible beta subunits (βA or βB), while activins are homodimers of the beta subunits. Both inhibins and activins play substantial roles in human reproduction and endocrine-responsive tumors. However, the prognostic significance and clinical implications of inhibin-βA subunits in uterine endometrioid adenocarcinomas have not been defined.

Methods

A series of 229 uterine endometrioid adenocarcinomas from a previously well-characterized cohort were re-evaluated for expression of the inhibin-βA subunit and correlated with several clinicopathological characteristics and clinical outcomes. Both staining intensity and analyses of a semi-quantitative score were used to evaluate inhibin-βA immunolabeling.

Results

The inhibin-βA subunit was present in malignant endometrioid uterine tissue, and was associated with myometrial invasion (p < 0.05). Univariate survival analysis demonstrated no differences in progression-free survival, cause-specific survival and overall survival for inhibin-βA using the median of the calculated semi-quantitative score. However, patients with a positive inhibin-βA, as identified by staining intensity, demonstrated significantly worse cause-specific survival (p < 0.05).

Conclusions

Evaluation of staining intensity revealed better cause-specific survival in patients with negative or low inhibin-βA immunolabeling intensity. Therefore, although of some use, semi-quantification of immunohistochemical reactions might not be definitive for evaluation of the inhibin-βA subunit as a prognostic marker in endometrial cancer patients. Therefore, staining intensity evaluation should be performed in addition to semi-quantitative analysis. Further research is warranted to elucidate the possible implications of inhibin-βA and endometrial carcinogenesis.

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Titel: Inhibin-βA subunit immunolabeling as a prognostic factor in endometrioid adenocarcinomas: a matter of evaluation?
verfasst von: Ioannis Mylonas
Publikationsdatum: 01.08.2011
Verlag: Springer-Verlag
Erschienen in: Archives of Gynecology and Obstetrics / Ausgabe 2/2011
Print ISSN: 0932-0067
Elektronische ISSN: 1432-0711
DOI: https://doi.org/10.1007/s00404-010-1680-1

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Inhibin-βA subunit immunolabeling as a prognostic factor in endometrioid adenocarcinomas: a matter of evaluation?

Abstract

Introduction

Methods

Results

Conclusions

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Abstract

Introduction

Methods

Results

Conclusions

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