Expression of apoptosis-related proteins in endometriomas and benign and malignant ovarian tumours

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Endometriomas showed increased p21 and Bax expression compared to benign tumors, while p53 expression was higher in malignant tumors than benign ones.

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This study assessed immunohistochemical expression of apoptosis-related proteins (p53, p21, bax, bak, fas, bcl-2, and bcl-x) in 10 endometriomas, 20 benign ovarian tumors (mucinous and serous), and 30 malignant ovarian tumors (mucinous, serous, and 2 endometrioid). Compared with benign tumors, endometriomas showed significantly higher p53 positivity (benign 0 vs endometrioma 1.9±3.2) and higher p21 expression (endometrioma 19.5±27.8 vs benign 1.7±6.7), while bax was also higher in endometriomas than in benign tumors; there were no group differences for bak, fas, bcl-2, or bcl-x. The paper reports that p53 and fas had a negative correlation in endometriomas, but it also notes that endometriomas shared some apoptosis-related alterations with malignant tumors despite having benign histologic features. This paper is centrally about endometriosis — it directly compares apoptosis-related protein expression in endometriomas versus benign and malignant ovarian tumors.

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Abstract

Apoptosis is a physiological process by which multicellular organisms eliminate superfluous cells. Alterations in apoptosis play a key role in tumour development. The objective was to evaluate the immunohistochemical expression of p53, p21, bax, bak, fas, bcl-2 and bcl-x proteins in 10 endometriomas, 20 benign ovarian tumours (10 mucinous, 10 serous) and 30 malignant ovarian tumours (9 mucinous, 19 serous; 2 endometrioids). p53 positive cells (mean+/-SD) in endometriomas, and benign and malignant tumours were 1.9+/-3.2, 0 and 16.2+/-33.0, respectively. The difference was significant between benign tumours and endometriomas (P=0.003) but not between endometriomas and malignant tumours. P21 expression in endometriomas and benign and malignant tumours was 19.5+/-27.8, 1.7+/-6.7 and 4.1+/-8.6, respectively. Increased p21 expression was found in endometriomas compared with benign (P=0.001) and malignant (P=0.01) tumours. Bax expression was higher in endometriomas than in benign tumours (P=0.01), but no difference was found between endometriomas and malignant tumours. No difference in bak, fas, bcl-2 or bcl-x expression was observed among the groups. In endometriomas, a negative correlation was found between p53 and fas expression (P=0.04, r=0.66). Although endometriomas have histological features of benign ovarian tumours, endometriomas share with malignant ovarian tumours certain alterations in apoptosis-related proteins.
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Abstract

Apoptosis is a physiological process by which multicellular organisms eliminate superfluous cells. Alterations in apoptosis play a key role in tumour development. The objective was to evaluate the immunohistochemical expression of p53, p21, bax, bak, fas, bcl-2 and bcl-x proteins in 10 endometriomas, 20 benign ovarian tumours (10 mucinous, 10 serous) and 30 malignant ovarian tumours (9 mucinous, 19 serous; 2 endometrioids). p53 positive cells (mean±SD) in endometriomas, and benign and malignant tumours were 1.9±3.2, 0 and 16.2±33.0, respectively. The difference was significant between benign tumours and endometriomas (P=0.003) but not between endometriomas and malignant tumours. P21 expression in endometriomas and benign and malignant tumours was 19.5±27.8, 1.7±6.7 and 4.1±8.6, respectively. Increased p21 expression was found in endometriomas compared with benign (P=0.001) and malignant (P=0.01) tumours. Bax expression was higher in endometriomas than in benign tumours (P=0.01), but no difference was found between endometriomas and malignant tumours. No difference in bak, fas, bcl-2 or bcl-x expression was observed among the groups. In endometriomas, a negative correlation was found between p53 and fas expression (P=0.04, r=0.66). Although endometriomas have histological features of benign ovarian tumours, endometriomas share with malignant ovarian tumours certain alterations in apoptosis-related proteins. Similar content being viewed by others

References

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Int J Oncol 18:965–972 Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Fauvet, R., Poncelet, C., Hugol, D. et al. Expression of apoptosis-related proteins in endometriomas and benign and malignant ovarian tumours. Virchows Arch 443, 38–43 (2003). https://doi.org/10.1007/s00428-003-0813-3 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s00428-003-0813-3

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endometriosis

MeSH descriptors

Apoptosis Biomarkers, Tumor Endometriosis Neoplasm Proteins Ovarian Neoplasms Adult Aged bcl-2-Associated X Protein bcl-2 Homologous Antagonist-Killer Protein bcl-X Protein Biomarkers, Tumor Cell Count Cyclin-Dependent Kinase Inhibitor p21 Cyclins Cyclins Endometriosis Endometriosis fas Receptor fas Receptor Female

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