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Updated: Dec 1, 2025
Collection, Isolation, and Flow Cytometric Analysis of Human Endocervical Samples
Published on: July 6, 2014
Alteration in endometrial helper T-cell subgroups in chronic endometritis
Jun Kitazawa1, Fuminori Kimura1, Akiko Nakamura1
1Department of Obstetrics and Gynecology, Shiga University of Medical Science, Shiga, Japan.
Insights
Chronic endometritis (CE) alters CD4+ T-cell populations in the endometrium, with increased Th1 and decreased Th2 cells. This finding impacts understanding CE pathophysiology and treatment development.
Area of Science:
- Reproductive immunology
- Gynecologic pathology
Background:
- Chronic endometritis (CE) is a condition affecting the uterine lining.
- The specific impact of CE on endometrial T-cell subpopulations, including CD4+ T cells (Th1, Th2, Th17, Treg), remains largely uncharacterized.
Purpose of the Study:
- To investigate the alterations in CD4+ T-cell subpopulations within the endometrium of women with chronic endometritis.
- To correlate these changes with markers of CE and explore potential pathophysiological mechanisms.
Main Methods:
- Endometrial lymphocytes were isolated from patients with and without CE.
- Flow cytometry and immunofluorescence were employed to analyze CD4+ T-cell profiles (Th1, Th2, Th17, Foxp3+ Treg).
- CD138+ cell counts and localization relative to CD4+ cells were examined.
Main Results:
- CE patients exhibited significantly higher proportions of Th1 cells and lower proportions of Th2 cells among endometrial CD4+ cells compared to controls.
- No significant differences were found in Th17 or Foxp3+ Treg cell populations.
- Increased Th1 and decreased Th2 cell proportions correlated with elevated CD138+ cell counts.
- CD4+ T cells were observed to cluster around CD138+ cells in CE patients.
Conclusions:
- The CD4+ T-cell profile in the endometrium is demonstrably altered in women with chronic endometritis.
- These immunologic changes may play a crucial role in the pathophysiology of CE.
- Understanding these alterations could guide the development of novel therapeutic strategies for CE.
Problem:
The effect of chronic endometritis (CE) on the subpopulation of CD4+ T cells, Th1, Th2, Th17, and regulatory T cells in the endometrium is unknown.
Method Of Study:
Lymphocytes were isolated from the endometrium of CE patients (n = 12) and non-CE patients (n = 7). The CD4+ T-cell profile was analyzed by flow cytometry and immunofluorescence.
Results:
In the endometrium of CE patients, there were significantly more Th1 cells among CD4+ cells and fewer Th2 cells in comparison to non-CE patients. No marked difference was observed in Th17 cells or Foxp3+ Treg cells. Moreover, the proportion of Th1 cells increased and the proportion of Th2 cells decreased as the number of CD138+ cells increased. Furthermore, when the localization of CD138+ cells and CD4+ cells was examined, CD4+ cells were found to be clustered around CD138+ cells in CE patients.
Conclusion:
The CD4+ T-cell profile in the endometrium is altered in women with CE. This finding may help to clarify the pathophysiology and development of treatment methods for CE.
