Cited by 52Endometriosis Research and TreatmentUterine Myomas and TreatmentsGynecological conditions and treatments

Myofibroblasts are evidence of chronic tissue microtrauma at the endometrial-myometrial junctional zone in uteri with adenomyosis

Ibrahim, Mohamed Gamal, Sillem, Martin, Plendl, Johanna, Chiantera, Vito, Sehouli, Jalid, Mechsner, Sylvia·2017·Reproductive Sciences

Abstract

Background Adenomyosis (AM) uteri exhibit hyperperistalsis. The latter causes a chronic tissue trauma at the endometrial-myometrial junctional zone (EMJZ). Upon tissue trauma, microdehiscences in the myometrium facilitate the translocation of basal endometrial fragments into the myometrium. There, a metaplasia (mediated by transforming growth factor β1 [TGFβ1] and connective tissue growth factor [CTGF]) occurs and AM lesions develop. The abundance of myofibroblasts in a tissue hallmarks metaplasia and points to a tissue microtrauma.Materials and methods To study if myofibroblasts-as an evidence of tissue microtrauma-are more abundant at EMJZ in AM-uteri, a case-control experimental study was carried out at Charité University Hospital-Endometriosis Research Centre. In all, 18 uteri with AM and 14 uteri without AM were obtained during laparoscopy-assisted vaginal hysterectomy. The immunolabeling of myofibroblastic metaplasia (alpha smooth muscle actin [ASMA] and collagen I), differentiated smooth muscle marker (desmin) and metaplasia mediators (TGF-β receptors 1, 2, 3 and CTGF) was investigated. The ultrastructure of myofibroblasts at EMJZ of AM uterus was characterized by transmission electron microscopy, in addition to an in vitro study to characterize myofibroblasts in the endometrium of non-AM uterus.Results Immunolabeling of ASMA and collagen I was significantly higher at EMJZ of AM uteri versus non-AM uteri. Furthermore, myofibroblasts were ultrastructurally characterized at EMJZ of AM. Endometrium of non-AM uterus exhibited 5% to 8% of its cells, expressing ASMA and collagen I. No difference was noted regarding metaplasia mediators immunolabeling between both the groups.Conclusion The abundant and persistent myofibroblasts (expressing ASMA/collagen I) at EMJZ in AM uteri are ultra-/microscopic evidence of chronic tissue trauma. They are of nonmyometrial origin, as they lack desmin immunolabeling.

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Crossref · 10.1177/1933719116687855

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  • ERs and PRs are present not only in glands and stroma but also in the smooth muscle component of deep endometriosis, and the expression of a-smooth muscle actin and collagen I in and around endometriotic lesions support the notion of the metaplastic process.

    “That E receptors (ERs) and PRs are present not only in glands and stroma but also in the smooth muscle component of deep endometriosis (229), and the expression of a-smooth muscle actin and collagen I in and around endometriotic lesions support the notion of the metaplastic process (230).”

    From Pathogenesis of deep endometriosis (2017) · cites this paper as [230]

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Authors
Ibrahim, M. G., Sillem, M., Plendl, J., Chiantera, V., Sehouli, J., & Mechsner, S.
Affiliations
  • Charité – Universitätsmedizin Berlin (DE)
  • Freie Universität Berlin (DE)
Corresponding author
Mechsner, Sylvia
Venue
Reproductive Sciences
Published
2017-10
Volume
24
Issue
10
Pages
1410-1418
ISSN
  • 1933-7191 (ISSN-L)
  • 1933-7205
OpenAlex
W2578931725
Cited by
52
References
35
Citations by year
2026: 1 · 2025: 3 · 2024: 7 · 2023: 2 · 2022: 8 · 2021: 8 · 2020: 5 · 2019: 5 · 2018: 9 · 2017: 3 · 2012: 1
FWCI
6.97
Type
journal article
Language
en
Open access
closed
Locations
  • Reproductive Sciences (publishedVersion)
  • PubMed (publishedVersion)
  • Nova Science Publishers (Nova Science Publishers, Inc.) (submittedVersion)
Funders
FAZIT Stiftung
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Endometriosis Research and Treatment
  • Health Sciences › Medicine › Obstetrics and Gynecology › Uterine Myomas and Treatments
  • Health Sciences › Medicine › Obstetrics and Gynecology › Gynecological conditions and treatments
Keywords
adenomyosis, myofibroblasts, endometrial-myometrial junction, alpha-smooth muscle actin, type I collagen, desmin, TGF-beta, connective tissue growth factor
MeSH terms
Actins, Adult, Desmin, Endometrium, Female, Humans, Myometrium, Biomarkers, Case-Control Studies, Receptors, Transforming Growth Factor beta, Connective Tissue Growth Factor, Myofibroblasts, Adenomyosis

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