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Updated: Jan 1, 2026

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
Published on: July 3, 2020
Critical Roles of E2F3 in Growth and Musculo-skeletal Phenotype in Mice
Hae-Rim Kim1, Faiz Ur Rahman1, Kwang-Soo Kim1,2
1Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Yeonjudanji-ro 30, Chungbuk 28116, Korea.
Abstract:
E2F3, a member of the E2F family, plays a critical role in cell cycle and proliferation by targeting downstream, retinoblastoma (RB) a tumor suppressor family protein. The purpose of this study, was to investigate the role and function of E2F3 in vivo. We examined phenotypic abnormalities, by deletion of the E2f3 gene in mice. Complete ablation of the E2F3 was fully penetrant, in the pure C57BL/6N background. The E2f3 - mouse embryo developed normally without fatal disorder. However, they exhibited reduced body weight, growth retardation, skeletal imperfection, and poor grip strength ability. Findings suggest that E2F3 has a pivotal role in muscle and bone development, and affect normal mouse growth.
Insights
The E2F3 gene is crucial for normal mouse growth, impacting muscle and bone development. Ablating E2F3 in mice caused growth retardation and skeletal issues, highlighting its importance in development.
Area of Science:
- Molecular Biology
- Genetics
- Developmental Biology
Background:
- E2F3 is a key regulator of the cell cycle and proliferation.
- It targets retinoblastoma (RB) proteins, which are tumor suppressors.
Purpose of the Study:
- To investigate the in vivo role and function of E2F3.
- To examine phenotypic abnormalities resulting from E2F3 gene deletion.
Main Methods:
- Deletion of the E2f3 gene in mice.
- Phenotypic analysis of E2f3-ablated mice on a C57BL/6N background.
Main Results:
- Complete ablation of E2F3 was fully penetrant in C57BL/6N mice.
- E2f3-deficient mouse embryos developed without fatal disorders.
- Mice lacking E2F3 showed reduced body weight, growth retardation, skeletal imperfections, and poor grip strength.
Conclusions:
- E2F3 plays a pivotal role in muscle and bone development.
- E2F3 is essential for normal mouse growth and development.
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