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Updated: Jan 7, 2026
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Preparation of Primary Myogenic Precursor Cell/Myoblast Cultures from Basal Vertebrate Lineages
Published on: April 30, 2014
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IGFBP2: A Factor That Negatively Regulates Muscle Development and Growth
Zhipeng Liu1, Yalong Su1, Zhilin Liu1
1Sanya Research Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, China.
Summary
A genetic variant in the IGFBP2 gene impacts goat growth and muscle development. Lower Insulin-like Growth Factor Binding Protein 2 (IGFBP2) levels enhance muscle cell growth and mitochondrial activity, offering breeding targets.
Area of Science:
- Animal Genetics
- Molecular Biology
- Livestock Science
Background:
- Livestock growth performance is crucial for meat production and skeletal muscle development.
- Identifying genetic variants influencing growth traits aids in selecting superior breeding stock.
- The role of Insulin-like Growth Factor Binding Protein 2 (IGFBP2) in livestock muscle development is debated, especially in goats.
Purpose of the Study:
- To investigate the genetic regulation of growth traits in Hainan Black goats (HNBGs).
- To elucidate the molecular mechanisms of Insulin-like Growth Factor Binding Protein 2 (IGFBP2) in goat skeletal muscle development.
Main Methods:
- Whole-genome resequencing of Hainan Black goats (HNBGs).
- Genotyping for a specific IGFBP2 variant (P1-Del-8-bp).
- Analysis of growth performance, Growth Hormone (GH), and IGFBP2 levels.
- In vitro studies involving IGFBP2 knockdown in goat primary myoblasts (GPMs).
- Assessment of Transforming Growth Factor Beta 2 (TGFβ2) and mitochondrial biogenesis.
Main Results:
- A growth-associated insertion/insertion variant (P1-Del-8-bp) was identified in the IGFBP2 3' UTR of HNBGs.
- The DD genotype was linked to impaired growth, lower GH, and higher IGFBP2 levels.
- IGFBP2 knockdown promoted GPM proliferation and differentiation, targeting TGFβ2.
- Reduced IGFBP2 enhanced myogenic differentiation via stimulated mitochondrial biogenesis.
Conclusions:
- A specific IGFBP2 variant significantly affects goat growth and muscle development.
- IGFBP2 negatively regulates goat skeletal muscle development by targeting TGFβ2 and influencing mitochondrial biogenesis.
- This study provides potential genetic targets for improving livestock breeding strategies for meat production.
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