Immunopathology of Endometriosis, Molecular Approaches

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This review discusses the role of immune dysregulation, inflammatory factors, and oxidative stress in the pathogenesis of endometriosis, highlighting potential future immunotherapies.

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This review discusses endometriosis (defined by endometrial tissue outside the uterus, often linked to retrograde menstruation) and focuses on how immune dysregulation—including immune cells, inflammatory cytokines and mediators, and oxidative stress—contributes to implantation, proliferation, angiogenesis, and ectopic endometrial stromal cell development. It describes a proposed inflammatory cycle in the peritoneum in which implantation of ectopic stromal cells triggers recruitment of immune cells and subsequent growth factor/cytokine elevations. The authors’ caveat is that the etiology remains unclear and the discussion is largely integrative, reflecting “current treatments” and “emerging evidence” rather than presenting new experimental results. This paper is centrally about endometriosis — it reviews immunopathology and molecular approaches to immune-driven inflammation in endometriosis.

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Abstract

Endometriosis (EMS) is a common chronic gynecological disorder affecting 5%-10% of reproductive-age women, often causing infertility, dyspareunia, pain, and limitations in physical and sexual activities. This condition is defined by the presence of endometrial tissue outside the uterus, commonly explained by Sampson's theory of retrograde menstruation. Although its etiology remains unclear, genetic, epigenetic, hormonal imbalances, oxidative stress, and immune factors play critical roles. Immune dysregulation, involving inflammatory factors, cytokines, and immune cells facilitates the implantation, proliferation, angiogenesis, and development of ectopic endometrial stromal cells (ESCs). Research indicates that the implantation of ESCs in the peritoneum triggers an inflammatory response, recruiting various immune cells and leading to a cycle of inflammation characterized by elevated growth factors and cytokines. In this review, we discuss the immune system's role in EMS pathogenesis, emphasizing the contributions of immune cells, inflammatory mediators, oxidative stress, and so forth. This review also highlights that while current treatments, including hormonal therapies and surgical interventions, aim to alleviate symptoms and improve fertility, emerging evidence suggests that advancements in immunotherapies targeting specific immune cell activities hold promise as innovative future treatment strategies enhancing healthcare management for affected women.
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Immunopathology of Endometriosis, Molecular Approaches Sima Amidifar School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorDavood Jafari Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorAmir Hossein Mansourabadi Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada Brain and Mind Research Institute, University of Ottawa, Ottawa, Ontario, Canada Ottawa Hospital Research Institute, Ottawa, Ontario, Canada Search for more papers by this authorSara Sadaghian Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorCorresponding Author Abdolreza Esmaeilzadeh Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Cancer Gene Therapy Research Center (CGRC), Zanjan University of Medical Sciences, Zanjan, Iran Correspondence: Abdolreza Esmaeilzadeh ([email protected]) Search for more papers by this authorSima Amidifar School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorDavood Jafari Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorAmir Hossein Mansourabadi Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada Brain and Mind Research Institute, University of Ottawa, Ottawa, Ontario, Canada Ottawa Hospital Research Institute, Ottawa, Ontario, Canada Search for more papers by this authorSara Sadaghian Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Search for more papers by this authorCorresponding Author Abdolreza Esmaeilzadeh Department of Immunology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Cancer Gene Therapy Research Center (CGRC), Zanjan University of Medical Sciences, Zanjan, Iran Correspondence: Abdolreza Esmaeilzadeh ([email protected]) Search for more papers by this authorABSTRACT Endometriosis (EMS) is a common chronic gynecological disorder affecting 5%–10% of reproductive-age women, often causing infertility, dyspareunia, pain, and limitations in physical and sexual activities. This condition is defined by the presence of endometrial tissue outside the uterus, commonly explained by Sampson's theory of retrograde menstruation. Although its etiology remains unclear, genetic, epigenetic, hormonal imbalances, oxidative stress, and immune factors play critical roles. Immune dysregulation, involving inflammatory factors, cytokines, and immune cells facilitates the implantation, proliferation, angiogenesis, and development of ectopic endometrial stromal cells (ESCs). Research indicates that the implantation of ESCs in the peritoneum triggers an inflammatory response, recruiting various immune cells and leading to a cycle of inflammation characterized by elevated growth factors and cytokines. In this review, we discuss the immune system's role in EMS pathogenesis, emphasizing the contributions of immune cells, inflammatory mediators, oxidative stress, and so forth. This review also highlights that while current treatments, including hormonal therapies and surgical interventions, aim to alleviate symptoms and improve fertility, emerging evidence suggests that advancements in immunotherapies targeting specific immune cell activities hold promise as innovative future treatment strategies enhancing healthcare management for affected women. Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available from the corresponding author upon reasonable request. References - 1Y. H. Lin, Y. H. Chen, H. Y. Chang, H. K. Au, C. R. Tzeng, and Y. H. Huang, “Chronic Niche Inflammation in Endometriosis-Associated Infertility: Current Understanding and Future Therapeutic Strategies,” International Journal of Molecular Sciences 19, no. 8 (2018): 2385, https://doi.org/10.3390/ijms19082385. - 2E. Pašalić, M. M. Tambuwala, and A. 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endometriosisdyspareuniainfertility

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Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis

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