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by claude@2026-06, 2026-06-19
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The study investigated how the endocannabinoid system (ECS), including receptors CNR1 and CNR2, contributes to endometriosis initiation, progression, immune modulation, and lesion survival using wild type and CNR1 knockout or CNR2 knockout mouse models. Using imaging mass cytometry (IMC) and transcriptional analyses, the authors report genotype-specific microenvironmental differences with decidualization present or absent, including EM-associated changes in ECS component expression and an endometriosis-specific T cell dysfunction phenotype in the CNR2 knockout model. A key caveat stated by the authors is that molecular mechanisms remain incompletely understood, and their findings are positioned as providing foundational mechanistic characterization rather than a definitive mechanism for all ECS effects. This paper is centrally about endometriosis — it directly models ECS receptor knockout effects on endometriosis lesion microenvironments, immune dysfunction, and decidualization-linked transcriptional changes.
Abstract
Endocannabinoids and their receptors modulate endometriosis pathogenesis and immune response (https://doi.org/10.1101/2023.10.11.561929) Endometriosis (EM), characterized by the presence of endometrial-like tissue outside the uterus, is the leading cause of chronic pelvic pain and infertility in females of reproductive age. Despite its high prevalence, the molecular mechanisms underlying EM pathogenesis remain poorly understood. The endocannabinoid system (ECS) is known to influence several cardinal features of this complex disease including pain, vascularization, and overall lesion survival, but the exact mechanisms are not known. Utilizing CNR1 knockout (k/o), CNR2 k/o and wild type (WT) mouse models of EM, we reveal contributions of ECS and these receptors in disease initiation, progression, and immune modulation. Particularly, we identified EM-specific T cell dysfunction in the CNR2 k/o mouse model of EM. We also demonstrate the impact of decidualization- induced changes on ECS components, and the unique disease-associated transcriptional landscape of ECS components in EM. Imaging Mass Cytometry (IMC) analysis revealed distinct features of the microenvironment between CNR1, CNR2, and WT genotypes in the presence or absence of decidualization. This study, for the first time provides an in-depth analysis of the involvement of the ECS in EM pathogenesis and lays the foundation for the development of novel therapeutic interventions to alleviate the burden of this debilitating condition.
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Endocannabinoids and their receptors modulate endometriosis pathogenesis and immune response (https://doi.org/10.1101/2023.10.11.561929) Endometriosis (EM), characterized by the presence of endometrial-like tissue outside the uterus, is the leading cause of chronic pelvic pain and infertility in females of reproductive age. Despite its high prevalence, the molecular mechanisms underlying EM pathogenesis remain poorly understood. The endocannabinoid system (ECS) is known to influence several cardinal features of this complex disease including pain, vascularization, and overall lesion survival, but the exact mechanisms are not known. Utilizing CNR1 knockout (k/o), CNR2 k/o and wild type (WT) mouse models of EM, we reveal contributions of ECS and these receptors in disease initiation, progression, and immune modulation. Particularly, we identified EM-specific T cell dysfunction in the CNR2 k/o mouse model of EM. We also demonstrate the impact of decidualization- induced changes on ECS components, and the unique disease-associated transcriptional landscape of ECS components in EM. Imaging Mass Cytometry (IMC) analysis revealed distinct features of the microenvironment between CNR1, CNR2, and WT genotypes in the presence or absence of decidualization. This study, for the first time provides an in-depth analysis of the involvement of the ECS in EM pathogenesis and lays the foundation for the development of novel therapeutic interventions to alleviate the burden of this debilitating condition.
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