Related Experiment Videos
Scaffold attachment factor B1 functions in development, growth, and reproduction
Margarita Ivanova1, Klaudia M Dobrzycka, Shiming Jiang
1Department of Medicine, Baylor College of Medicine, Breast Center, One Baylor Plaza, Houston, TX 77030, USA.
Molecular and Cellular Biology
|March 31, 2005
Summary
Scaffold attachment factor B1 (SAFB1) is crucial for development and reproduction. SAFB1 deficiency in mice leads to growth defects, infertility, and lethality, highlighting its essential in vivo functions.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Scaffold attachment factor B1 (SAFB1) is a DNA/RNA-binding protein involved in RNA processing and stress response.
- SAFB1 possesses a transcriptional repression domain and interacts with hormone receptors.
Purpose of the Study:
- To investigate the in vivo function of SAFB1 by generating and analyzing SAFB1 mutant mice.
- To elucidate the role of SAFB1 in growth, development, and reproductive system function.
Main Methods:
- Generation of SAFB1 mutant mice via targeted deletion in embryonic stem cells.
- Phenotypic analysis of SAFB1 knockout mice, including growth, reproductive parameters, and cellular assays.
- Assessment of serum hormone levels and gene expression in mutant and wild-type mice.
Main Results:
- SAFB1 deficiency caused prenatal and neonatal lethality, dwarfism, and low insulin-like growth factor 1 (IGF1) levels.
- SAFB1 null mice exhibited severe reproductive system defects, including male infertility and subfertility/infertility in females.
- SAFB1-/- fibroblasts showed increased estrogen receptor alpha activity and enhanced IGF1 responsiveness.
Conclusions:
- SAFB1 plays a critical role in mammalian development, growth regulation, and reproductive system integrity.
- The findings establish SAFB1 as an essential in vivo regulator of hormone receptor activity and growth pathways.
- SAFB1 is vital for normal physiological processes, impacting multiple organ systems.