Related Experiment Video
Updated: May 12, 2026
08:43
Loss- and Gain-of-function Approach to Investigate Early Cell Fate Determinants in Preimplantation Mouse Embryos
Published on: June 6, 2016
MicroRNAs-140-5p/140-3p modulate Leydig cell numbers in the developing mouse testis
Joanna Rakoczy1, Selene L Fernandez-Valverde, Evgeny A Glazov
1Division of Molecular Genetics and Development, Institute for Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia.
Biology of Reproduction
|April 26, 2013
Summary
MicroRNAs regulate gonad development. Researchers found miR-140-5p/miR-140-3p are crucial for mouse testis differentiation, impacting Leydig cell development.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are key regulators of biological processes, including cell differentiation and development.
- Gonad differentiation is a fundamental and tightly regulated developmental process essential for sexual development.
Purpose of the Study:
- To identify microRNAs (miRNAs) involved in gonad differentiation.
- To investigate the role of specific miRNAs in mouse testis development.
Main Methods:
- High-throughput sequencing was used to examine miRNA expression profiles in developing mouse testes and ovaries.
- Analysis focused on sexually dimorphic miRNAs, particularly miR-140-3p and miR-140-5p.
- A miR-140-5p/miR-140-3p-null mouse model was analyzed.
Main Results:
- Several miRNAs, including members of the let-7 family, miR-378, and miR-140-3p, exhibited sexually dimorphic expression patterns.
- miR-140-3p and miR-140-5p were found to be testis-enriched and expressed in testis cords.
- Null mice for miR-140-5p/miR-140-3p showed a significant increase in Leydig cells in developing XY gonads.
Conclusions:
- The miR-140-5p/miR-140-3p miRNA pair plays a significant role in mouse testis differentiation.
- These miRNAs are important regulators of Leydig cell development during gonadogenesis.
