PMID- 30523440 OWN - NLM STAT- MEDLINE DCOM- 20200207 LR - 20200207 IS - 1432-0711 (Electronic) IS - 0932-0067 (Linking) VI - 299 IP - 2 DP - 2019 Feb TI - Arrangement of myofibroblastic and smooth muscle-like cells in superficial peritoneal endometriosis and a possible role of transforming growth factor beta 1 (TGFbeta1) in myofibroblastic metaplasia. PG - 489-499 LID - 10.1007/s00404-018-4995-y [doi] AB - 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 TGFbeta1 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. FAU - Ibrahim, Mohamed Gamal AU - Ibrahim MG AUID- ORCID: 0000-0001-6648-9281 AD - Clinic for Gynaecology, Charite University of Medicine, Hindenburgdamm 30, 12203, Berlin, Germany. AD - Department of Gynecology and Obstetrics, UKM Fertility Center, University Hospital of Muenster, Domagkstr. 11, 48149, Munster, Germany. FAU - Sillem, Martin AU - Sillem M AD - Universitats-Frauenklinik Homburg/Saar und Praxisklinik am Rosengarten, Augustaanlage 7-11, 68165, Mannheim, Germany. FAU - Plendl, Johanna AU - Plendl J AD - Department of Veterinary Medicine, Institute of Veterinary Anatomy, Free University of Berlin, Berlin, Germany. FAU - Taube, Eliane T AU - Taube ET AD - Institute for Pathology, Charite University of Medicine, Chariteplatz 1, 10117, Berlin, Germany. FAU - Schuring, Andreas AU - Schuring A AD - Department of Gynecology and Obstetrics, UKM Fertility Center, University Hospital of Muenster, Domagkstr. 11, 48149, Munster, Germany. FAU - Gotte, Martin AU - Gotte M AD - Department of Gynecology and Obstetrics, UKM Fertility Center, University Hospital of Muenster, Domagkstr. 11, 48149, Munster, Germany. FAU - Chiantera, Vito AU - Chiantera V AD - Clinic for Gynaecology, Charite University of Medicine, Hindenburgdamm 30, 12203, Berlin, Germany. FAU - Sehouli, Jalid AU - Sehouli J AD - Clinic for Gynaecology, Charite University of Medicine, Hindenburgdamm 30, 12203, Berlin, Germany. FAU - Mechsner, Sylvia AU - Mechsner S AD - Clinic for Gynaecology, Charite University of Medicine, Hindenburgdamm 30, 12203, Berlin, Germany. sylvia.mechsner@charite.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20181207 PL - Germany TA - Arch Gynecol Obstet JT - Archives of gynecology and obstetrics JID - 8710213 RN - 0 (TGFB1 protein, human) RN - 0 (Transforming Growth Factor beta1) SB - IM MH - Adult MH - Cell Differentiation MH - Endometriosis/*physiopathology MH - Female MH - Humans MH - Metaplasia MH - Muscle, Smooth/*metabolism MH - Myofibroblasts/*metabolism MH - Peritoneal Diseases/*physiopathology MH - Peritoneum/*physiopathology MH - Transforming Growth Factor beta1/*metabolism OTO - NOTNLM OT - Myofibroblastic metaplasia OT - Peritoneal endometriosis OT - Smooth muscle-like cells OT - TGFbeta1 EDAT- 2018/12/14 06:00 MHDA- 2020/02/08 06:00 CRDT- 2018/12/08 06:00 PHST- 2018/05/14 00:00 [received] PHST- 2018/11/24 00:00 [accepted] PHST- 2018/12/14 06:00 [pubmed] PHST- 2020/02/08 06:00 [medline] PHST- 2018/12/08 06:00 [entrez] AID - 10.1007/s00404-018-4995-y [pii] AID - 10.1007/s00404-018-4995-y [doi] PST - ppublish SO - Arch Gynecol Obstet. 2019 Feb;299(2):489-499. doi: 10.1007/s00404-018-4995-y. Epub 2018 Dec 7.