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Isolation of Uterine Innate Lymphoid Cells for Analysis by Flow Cytometry
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Composition, Development, and Function of Uterine Innate Lymphoid Cells.

Jean-Marc Doisne1, Elisa Balmas2, Selma Boulenouar2

  • 1Department of Obstetrics and Gynecology, University of Cambridge School of Clinical Medicine, National Institute for Health Research Cambridge Biomedical Research Centre, Cambridge CB2 0SW, United Kingdom; jmd83@medschl.cam.ac.uk.

Journal of Immunology (Baltimore, Md. : 1950)
|September 16, 2015
PubMed
Summary

This study identifies uterine innate lymphoid cells (ILCs), particularly uILC3s, in the human endometrium and decidua. These cells are crucial for uterine mucosal immunity and pregnancy, with unique features distinct from other tissues.

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Area of Science:

  • Immunology
  • Reproductive Biology

Background:

  • Innate lymphoid cells (ILCs) are vital for immunity and tissue balance.
  • Uterine NK cells are known for their role in pregnancy, but other uterine ILCs (uILCs) roles are less understood.

Purpose of the Study:

  • To characterize the composition of uILCs in the human endometrium during the luteal phase and decidua during early pregnancy.
  • To investigate the unique features and cytokine production of uILCs.

Main Methods:

  • Analysis of uILC populations in human endometrial and decidual tissues.
  • Comparison of mouse and human uILC development and cytokine profiles.

Main Results:

  • A significant population of uILC3s was identified in human endometrium and decidua, distinct from barely detectable uILC1s and uILC2s.
  • Human uILC3s are mostly NCR(+) and overlap with IL-22-producing uterine NK cells.
  • Mouse uILC3 development is Nfil3-independent, and uILCs constitutively produce IL-5, IL-17, and IL-22.

Conclusions:

  • This research establishes a foundation for understanding uILC function in the uterine mucosa.
  • uILCs play critical roles in uterine homeostasis, barrier immunity, and during pregnancy.