Deep Invasive Endometriosis Lesions of the Rectosigmoid May Be Related to Alterations in Cell Kinetics

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Rectosigmoid endometriosis lesions showed altered cell proliferation, indicated by TOP2A expression and cell turnover, but similar apoptosis rates compared to healthy endometrium, suggesting cell kinetic imbalance contributes to disease development.

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This study examined cell kinetics in deep invasive rectosigmoid endometriotic lesions by measuring TOP2A, p53, and c-erb2 expression with immunohistochemistry, and quantifying apoptosis by counting apoptotic bodies in 60 patients with rectosigmoid endometriosis versus 20 women without endometriosis. The number of lesions correlated positively with TOP2A expression, and lesion size and lesion number correlated with cell turnover index, while the apoptosis index was similar between endometriosis lesions and eutopic endometrium. TOP2A expression was significantly lower in the endometriosis group than in controls, and the authors concluded that proliferation-related changes without differences in AI indicate an imbalance in cell kinetics. This paper is centrally about endometriosis — it specifically analyzes proliferation and apoptosis markers in rectosigmoid deep invasive endometriotic lesions.

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Abstract

OBJECTIVES: The aim of this study was to analyze cell kinetics through expression and apoptosis of topoisomerase 2-α (TOP2A), p53, and c-erb2 in rectosigmoid endometriotic lesions and in healthy endometrial tissue and to establish correlations between such findings and clinical data in patients with rectosigmoid endometriosis. METHODS: Sixty patients with rectosigmoid endometriosis and 20 control women without endometriosis were included. Immunohistochemical assays were used to measure expression of TOP2A, p53, and c-erB-2. Apoptosis was quantified by directly counting the apoptotic bodies. FINDINGS: The number of lesions was positively correlated with expression of TOP2A in the lesion. There was also significant correlation between the lesions' size and number and cell turnover index. Apoptosis index (AI) was the same for endometriosis lesions and eutopic endometrium. Expression of TOP2A was significantly lower in the endometriosis group compared to the controls. CONCLUSIONS: Changes in cell proliferation but not in the AI in rectosigmoid endometriosis are indicative of an imbalance in cell kinetics that may lead to the development of the disease.
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Abstract

Objectives The aim of this study was to analyze cell kinetics through expression and apoptosis of topoisomerase 2-α (TOP2A), p53, and c-erb2 in rectosigmoid endometriotic lesions and in healthy endometrial tissue and to establish correlations between such findings and clinical data in patients with rectosigmoid endometriosis.

Methods

Sixty patients with rectosigmoid endometriosis and 20 control women without endometriosis were included. Immunohistochemical assays were used to measure expression of TOP2A, p53, and c-erB-2. Apoptosis was quantified by directly counting the apoptotic bodies. Findings The number of lesions was positively correlated with expression of TOP2A in the lesion. There was also significant correlation between the lesions’ size and number and cell turnover index. Apoptosis index (AI) was the same for endometriosis lesions and eutopic endometrium. Expression of TOP2A was significantly lower in the endometriosis group compared to the controls.

Conclusions

Changes in cell proliferation but not in the AI in rectosigmoid endometriosis are indicative of an imbalance in cell kinetics that may lead to the development of the disease. Similar content being viewed by others

References

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Condition tags

mesh:D004715endometriosis

MeSH descriptors

Antigens, Neoplasm Apoptosis Cell Proliferation Colon, Sigmoid DNA-Binding Proteins DNA Topoisomerases, Type II Endometriosis Endometrium Rectum Adult Antigens, Neoplasm Case-Control Studies Colon, Sigmoid Colon, Sigmoid Cross-Sectional Studies DNA-Binding Proteins DNA Topoisomerases, Type II Endometriosis Endometriosis Endometrium

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