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Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos
Published on: April 29, 2011
Regulatory elements that control the lineage-specific expression of myoD
D J Goldhamer1, A Faerman, M Shani
1Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA 19111.
Science (New York, N.Y.)
|May 4, 1992
Summary
Investigating the myogenic determination gene myoD, scientists found a distal enhancer. This enhancer, along with the promoter, specifically directs skeletal muscle lineage in mouse embryos, revealing developmental regulation mechanisms.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Skeletal muscle lineage determination is crucial for development.
- The myogenic determination gene, myoD, plays a key role in muscle formation.
- Understanding the regulation of myoD is essential for deciphering muscle development.
Purpose of the Study:
- To investigate the molecular basis of skeletal muscle lineage determination.
- To identify and analyze DNA control elements regulating the myoD gene.
- To elucidate the regulatory mechanisms governing myoD expression during development.
Main Methods:
- Analysis of DNA control elements, including a distal enhancer and promoter of the human myoD gene.
- Testing enhancer and promoter activity in various myogenic and nonmyogenic cell lines.
- Utilizing transgenic mouse embryos to assess in vivo gene expression patterns directed by the myoD elements.
Main Results:
- A distal enhancer that positively regulates human myoD gene expression was identified.
- Both the myoD enhancer and promoter showed activity in multiple cell lines.
- In transgenic mouse embryos, the combined enhancer and promoter specifically directed lacZ transgene expression to the skeletal muscle lineage.
Conclusions:
- Developmental regulation of myoD involves mechanisms restricting accessibility of its control elements.
- Positive trans-acting factors likely play a role in myoD regulation during skeletal muscle development.
- These findings provide insights into the precise control of gene expression during lineage determination.
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