Related Experiment Video
Updated: Jun 4, 2025
07:03
An Efficient Method for Extracting Human Fallopian Tube Epithelia for Single-cell Analyses
Published on: March 28, 2025
500
Walthard Cell Nests/Transitional Cell Metaplasia in Distal Fallopian Tubes and Pelvic Peritoneum Derived From Reserve
Uiree Jo1, Chang Ohk Sung1, Kyu-Rae Kim1,2
1Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine.
Summary
Transitional cell metaplasia (TCM) originates from reserve cells beneath the fallopian tube and pelvic mesothelium. These cells multiply and differentiate into urothelium, with androgen receptor (AR) playing a key role.
Area of Science:
- Gynecologic Pathology
- Cell Biology
- Histogenesis
Background:
- Transitional cell metaplasia (TCM) is a common finding resembling urothelium near the fallopian tube and pelvic mesothelium.
- The origin and development (histogenesis) of TCM remain largely unelucidated.
Purpose of the Study:
- To investigate the histogenesis of transitional cell metaplasia (TCM).
- To determine the origin of TCM in the fallopian tube and pelvic mesothelium.
- To analyze the immunoprofiles of key markers during TCM development.
Main Methods:
- Histomorphologic analysis of 31 tubal epithelium and 35 pelvic mesothelium TCM foci.
- Immunohistochemical profiling for cytokeratin 17 (CK17), CK5/6, p63, GATA-3, estrogen receptor (ER), and androgen receptor (AR).
Main Results:
- TCM in both locations shares similar histology and immunoprofiles but shows distinct developmental differences.
- Emergence of CK17-positive reserve cells beneath tubal epithelium precedes TCM.
- Mesothelium also exhibits CK17 expression, suggesting intrinsic reserve/stem cell potential.
- Reserve cells differentiate into urothelial-like cells, expressing CK5/6, p63, and GATA-3.
- Reciprocal ER and AR expression observed, with significantly stronger AR presence.
Conclusions:
- Transitional cell metaplasia (TCM) originates from reserve cells beneath the fallopian tube epithelium and pelvic mesothelium.
- These reserve cells proliferate and differentiate into urothelium.
- Androgen receptor (AR) likely plays a significant role in the histogenesis of TCM.
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