Abstract:
PURPOSE:Superficial peritoneal endometriotic (pEM) lesions are composed of endometrial glands and stroma, in addition to a third component-myofibroblasts and smooth muscles (SM)-like cells. The latter develops secondary to a metaplasia. In this study, we characterised the third component cells in pEM according to differentiation markers in different micro-compartments. Furthermore, a possible effect of TGFβ1 on myofibroblastic metaplasia in endometriotic epithelial cells was studied. METHODS:Seventy-six premenopausal patients were included. Peritoneal biopsies were excised from EM patients (n = 23), unaffected peritoneum (peritoneum from EM patients but without EM components, n = 5/23) and non-EM patients (n = 10). All peritoneal biopsies were immunolabeled for ASMA, calponin, collagen I, desmin, TGFß receptor 1 (R1), R2 and R3 in addition to ultrastructure examination by transmission electron microscopy (TEM) (n = 1). TGFß1 level was measured in peritoneal fluid (PF) (EM, n = 19 and non-EM, n = 13) collected during laparoscopy. Furthermore, TGFß1 effect on myofibroblastic metaplasia was studied in vitro. RESULTS:At the centre of pEM lesions, calponin immunolabeling outweighs the collagen I while in the periphery the reverse occurs. SM-like cells expressing desmin predominate at the periphery, while ASMA immunolabeling was detectable in all micro-compartments. Both indicate an abundance of myofibroblasts at the centre of pEM lesions and SM-like cells in the periphery. Although activated TGFß1 in PF did not differ between EM and non-EM, it inhibited the cell proliferation of the endometriotic epithelial cells and induced an upregulation in ASMA and collagen IA2 expression as well. CONCLUSION:The abundance of the myofibroblasts and SM-like cells points to a myofibroblastic metaplasia in pEM. Both cells are differentially arranged in the different micro-compartments of pEM lesions, with increasing cell maturity towards the periphery of the lesion. Furthermore, TGFß1 may play a role in the myofibroblastic metaplasia of the endometriotic epithelial cells. These findings provide a better insight in the micro-milieu in EM lesions, where most of the disease dynamics occur.
journal_name
Arch Gynecol Obstetjournal_title
Archives of gynecology and obstetricsauthors
Ibrahim MG,Sillem M,Plendl J,Taube ET,Schüring A,Götte M,Chiantera V,Sehouli J,Mechsner Sdoi
10.1007/s00404-018-4995-ysubject
Has Abstractpub_date
2019-02-01 00:00:00pages
489-499issue
2eissn
0932-0067issn
1432-0711pii
10.1007/s00404-018-4995-yjournal_volume
299pub_type
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journal_title:Archives of gynecology and obstetrics
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journal_title:Archives of gynecology and obstetrics
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journal_title:Archives of gynecology and obstetrics
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journal_title:Archives of gynecology and obstetrics
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更新日期:2012-03-01 00:00:00
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