Endometriotic Cells Exhibit Metaplastic Change and Oxidative DNA Damage as Well as Decreased Function, Compared to Normal Endometrium

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Endometriotic cells exhibit metaplasia and oxidative DNA damage, along with decreased expression of TGFβ-1 and IGF-I, compared to normal endometrium.

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The study compared normal endometrium with endometriotic tissue, assessing placental cadherin (P-cadherin) as a marker linked to metaplasia and early neoplasia, and 8-hydroxyguanine as an indicator of oxidative DNA damage. Using immunolabeling, the authors reported no detectable labeling for anti-P-cadherin or anti-8-hydroxydeoxyguanosine in normal endometrium, while endometriotic epithelium showed marked labeling on the apical surface. Markers associated with normal endometrial function, measured by de-expressed transforming growth factor β-1 (TGFβ-1) and insulin-like growth factor-I (IGF-I), were reduced in endometriosis, leading the authors to conclude that endometriosis cells exhibit metaplastic change, oxidative DNA damage, and markedly decreased function. This paper is centrally about endometriosis — it directly compares endometriotic tissue to normal endometrium for evidence of metaplasia, oxidative DNA damage, and reduced functional marker expression.

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Abstract

A widely accepted theory of the etiology of endometriosis is that it originates from the implantation and invasion of cells from retrograde menstruation to various sites in the body particularly the pelvic peritoneal cavity. Little is known of the function of these cells in ectopic sites. Normal endometrium was compared with endometriotic tissue using an antibody to Placental Cadherin (P Cadherin), a recently studied cadherin that is implicated in metaplasia and early neoplasia and also 8-hydroxyguanine, an indicator of oxidative DNA damage. Comparisons of endometrial tissue function were made using expression of transforming growth factor beta-1 (TGFbeta-1) and insulin-like growth factor-I (IGF-I). There was no labelling for anti-P Cadherin or anti-8-hydroxydeoxyguanosine in normal endometrium but marked labelling for both on the apical surface of the endometriotic epithelium. Studies of markers of normal endometrial function were all de-expressed in endometriosis. This study indicates that endometriosis cells are abnormal and exhibit oxidative DNA damage, metaplasia and markedly reduced function compared to normal endometrium.
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Summary A widely accepted theory of the etiology of endometriosis is that it originates from the implantation and invasion of cells from retrograde menstruation to various sites in the body particularly the pelvic peritoneal cavity. Little is known of the function of these cells in ectopic sites. Normal endometrium was compared with endometriotic tissue using an antibody to Placental Cadherin (P Cadherin), a recently studied cadherin that is implicated in metaplasia and early neoplasia and also 8-hydroxyguanine, an indicator of oxidative DNA damage. Comparisons of endometrial tissue function were made using expression of transforming growth factor β-1 (TGFβ-1) and insulin-like growth factor-I (IGF-I). There was no labelling for anti-P Cadherin or anti-8-hydroxydeoxyguanosine in normal endometrium but marked labelling for both on the apical surface of the endometriotic epithelium. Studies of markers of normal endometrial function were all de-expressed in endometriosis. This study indicates that endometriosis cells are abnormal and exhibit oxidative DNA damage, metaplasia and markedly reduced function compared to normal endometrium. 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Endometriotic Cells Exhibit Metaplastic Change and Oxidative DNA Damage as Well as Decreased Function, Compared to Normal Endometrium. J Mol Hist 36, 257–263 (2005). https://doi.org/10.1007/s10735-005-3802-9 Received: Accepted: Issue date: DOI: https://doi.org/10.1007/s10735-005-3802-9

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endometriosis

MeSH descriptors

DNA Damage Endometriosis Endometrium Endometrium Cadherins Cadherins Deoxyguanosine Deoxyguanosine Endometriosis Endometrium Epithelial Cells Epithelial Cells Female Humans Insulin-Like Growth Factor I Insulin-Like Growth Factor I Metaplasia Oxidation-Reduction Transforming Growth Factor beta1 Transforming Growth Factor beta1

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