A comparison of cathepsin D levels in endometriotic tissue and in uterine endometrium

Agneta Bergqvist, Mårten Fernö, Sylvia Mattson
In: Fertility and Sterility · 1996 · vol. 65(6) , pp. 1130–1134 · doi:10.1016/s0015-0282(16)58326-5 · W4297086709
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Cathepsin D levels were compared between endometriotic tissue and uterine endometrium.

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Abstract

ObjectiveTo assay the cathepsin D level in endometriotic tissue, to study the difference to uterine endometrium and the correlation to localization.DesignProspective consecutive study on endometriotic tissue and endometrium.SettingUniversity clinic.PatientsThirty-five women undergoing laparotomy for clinical indications.InterventionsSamples of endometriotic tissue and uterine endometrium were obtained simultaneously from the same woman at laparotomy, fresh frozen, and assayed using an immunoradiometric method.Main outcome measureThe cathepsin D level in endometrium and endometriotic tissue expressed in pmol/mg DNA.ResultsThe cathepsin D level was significantly higher in endometriotic tissue than in endometrium both in follicular and luteal phase. The highest values in endometriotic tissue were found in luteal phase, in ovarian lesions, and in primary lesions. In endometrium, but not in endometriotic tissue, there was a positive correlation between cathepsin D level and serum E2 level.ConclusionThe level of the proteolytic enzyme cathepsin D is significantly higher in endometriotic tissue than in endometrium, which might be of importance for implantation and the invasive growth of endometriotic tissue.

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