Mass cytometry analysis reveals a distinct immune environment in peritoneal fluid in endometriosis: a
Manman Guo1, Cemsel Bafligil2, Thomas Tapmeier3
1Botnar Research Centre, NIHR Biomedical Research Unit Oxford, Nuffield Department of Musculoskeletal Sciences, University of Oxford, Oxford, UK. manman.guo@ndorms.ox.ac.uk.
Insights
This study reveals a complex immune environment in endometriosis patients, identifying specific immune cell signatures in the peritoneal cavity. These findings highlight the roles of both innate and adaptive immunity in the disease, offering potential therapeutic targets.
Area of Science:
- Immunology
- Gynaecology
Background:
- Endometriosis is a gynaecological condition characterized by immune cell infiltration and inflammation in the peritoneal cavity.
- The immune microenvironment plays a crucial role in endometriosis pathology.
Purpose of the Study:
- To systematically characterize the immune microenvironment in the peritoneal cavity of endometriosis patients.
- To identify specific immune cell signatures associated with endometriosis.
Main Methods:
- Mass cytometry (CyTOF) was used to analyze immune cells in peritoneal fluid and peripheral blood.
- Samples were collected from both endometriosis and control patients.
Main Results:
- Over 40 distinct immune cell types were identified in the peritoneal cavity, indicating a complex inflammatory microenvironment.
- Increased CD69+ T cell subsets were observed in the peritoneal fluid of endometriosis patients compared to controls.
- Reduced expression of T cell function markers on CD69+ cells in peritoneal fluid suggests altered immune cell function.
Conclusions:
- The study provides a comprehensive characterization of the peritoneal immune environment in endometriosis.
- Identified immune cell signatures offer insights into disease pathology and potential therapeutic targets.
- Both innate and adaptive immune systems appear to play significant roles in endometriosis.
Background:
Endometriosis is a gynaecological condition characterised by immune cell infiltration and distinct inflammatory signatures found in the peritoneal cavity. In this study, we aim to characterise the immune microenvironment in samples isolated from the peritoneal cavity in patients with endometriosis.
Methods:
We applied mass cytometry (CyTOF), a recently developed multiparameter single-cell technique, in order to characterise and quantify the immune cells found in peritoneal fluid and peripheral blood from endometriosis and control patients.
Results:
Our results demonstrate the presence of more than 40 different distinct immune cell types within the peritoneal cavity. This suggests that there is a complex and highly heterogeneous inflammatory microenvironment underpinning the pathology of endometriosis. Stratification by clinical disease stages reveals a dynamic spectrum of cell signatures suggesting that adaptations in the inflammatory system occur due to the severity of the disease. Notably, among the inflammatory microenvironment in peritoneal fluid (PF), the presence of CD69+ T cell subsets is increased in endometriosis when compared to control patient samples. On these CD69+ cells, the expression of markers associated with T cell function are reduced in PF samples compared to blood. Comparisons between CD69+ and CD69- populations reveal distinct phenotypes across peritoneal T cell lineages. Taken together, our results suggest that both the innate and the adaptive immune system play roles in endometriosis.
Conclusions:
This study provides a systematic characterisation of the specific immune environment in the peritoneal cavity and identifies cell immune signatures associated with endometriosis. Overall, our results provide novel insights into the specific cell phenotypes governing inflammation in patients with endometriosis. This prospective study offers a useful resource for understanding disease pathology and opportunities for identifying therapeutic targets.
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