Related Experiment Video
Updated: Jun 20, 2026
14:45
Transgenic Rodent Assay for Quantifying Male Germ Cell Mutant Frequency
Published on: August 6, 2014
Spermiogenesis deficiency in mice lacking the Trf2 gene
D Zhang1, T L Penttila, P L Morris
1Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY 10021, USA.
Science (New York, N.Y.)
|May 16, 2001
Summary
TATA-binding protein-related factor 2 (TRF2) deficiency in mice causes male sterility due to impaired sperm development. Unlike other species, Trf2-deficient mice are viable but exhibit defects in spermiogenesis and gene transcription.
Area of Science:
- Molecular Biology
- Genetics
- Reproductive Biology
Background:
- TATA-binding protein-related factors (TRFs) are implicated in gene-specific transcriptional regulation.
- Previous studies in C. elegans and X. laevis reported embryonic lethality upon TRF2 inactivation.
Purpose of the Study:
- To investigate the biological functions of TRF2 in mammals.
- To determine the consequences of TRF2 deficiency in mice.
Main Methods:
- Generation of Trf2 knockout mice (Trf2-/-).
- Assessment of mouse viability and reproductive phenotypes.
- Analysis of spermiogenesis and gene-specific transcription in Trf2-/- mice.
Main Results:
- Trf2-/- mice are viable, contrasting with findings in other species.
- Trf2 deficiency leads to male sterility with severe defects in spermiogenesis.
- Spermatid differentiation halts at step 7, failing to elongate.
- Gene-specific transcription deficiencies were observed in the testis.
Conclusions:
- Mammalian TRF2 has specialized functions in the testis, distinct from its roles in other organisms.
- TRF2 is essential for transcriptional regulation of genes critical for spermiogenesis in mammals.
