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Serial Enrichment of Spermatogonial Stem and Progenitor Cells (SSCs) in Culture for Derivation of Long-term Adult Mouse SSC Lines
Published on: February 25, 2013
CD71 defines functionally active spermatogonial stem cells with enhanced transplantation potential in mouse testes
Beom-Jin Shin1, Jin Seop Ahn2, Jeeseung Kim3
1Department of Animal Science and Technology, Chung-Ang University, Anseong, Republic of Korea.
Animal Cells and Systems
|August 1, 2026
Summary
Researchers identified CD71 as a marker to enrich for spermatogonial stem cells (SSCs), crucial for sperm production. This discovery aids in isolating and studying SSCs, potentially improving fertility restoration methods.
Area of Science:
- Reproductive Biology
- Stem Cell Biology
- Cellular and Molecular Biology
Background:
- Spermatogonial stem cells (SSCs) are vital for male fertility but difficult to isolate due to scarcity and lack of specific markers.
- Current methods for SSC isolation and characterization are limited by heterogeneity and the absence of reliable surface markers.
Purpose of the Study:
- To identify and validate a novel surface marker for enriching mouse spermatogonial stem cell populations.
- To assess the potential of CD71 as a marker for SSC isolation and its correlation with SSC function.
Main Methods:
- Immunohistochemistry was used to assess CD71 co-localization with the known SSC marker GFRα1.
- Quantitative real-time PCR (qRT-PCR) was employed to analyze Tfrc gene expression in different cell populations.
- Fluorescence-activated cell sorting (FACS) and functional transplantation assays were performed to evaluate SSC enrichment and regenerative capacity.
Main Results:
- CD71 expression co-localized with GFRα1 in approximately 81% of undifferentiated spermatogonia.
- Tfrc (encoding CD71) mRNA levels were significantly higher in SSC-enriched populations and CD71+ cells compared to control cell lines.
- CD71high cells demonstrated a 5.5-fold increase in colony formation in transplantation assays, indicating enhanced SSC regenerative capacity.
Conclusions:
- CD71 serves as a reliable marker for enriching spermatogonial stem cell populations from mouse testes.
- The CD71high cell population exhibits superior spermatogenic regenerative potential.
- CD71 can be utilized as a complementary marker for SSC enrichment, aiding in fertility restoration research.
