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Published on: September 14, 2018
Long-range regulation of alpha-globin gene expression
Douglas R Higgs1, Douglas Vernimmen, Bill Wood
1MRC Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford OX3 9DS, United Kingdom.
Advances in Genetics
|February 20, 2008
Summary
Long-range gene regulation involves cis-acting sequences acting at a distance. This study examines how remote elements control alpha-globin gene expression during red blood cell development.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Gene expression can be regulated by cis-acting sequences located far from the target gene (10-1000 kb).
- Mammalian hemoglobin genes serve as models for understanding long-range gene regulation.
- These distant elements share characteristics with proximal regulatory elements but act over greater distances.
Purpose of the Study:
- To investigate the activation of remote regulatory elements in the alpha-globin cluster during hematopoietic stem cell differentiation.
- To understand how these upstream elements control spatial and temporal expression from the alpha-globin gene promoter.
Main Methods:
- Detailed investigation of the alpha-globin gene cluster in differentiating hematopoietic stem cells.
- Analysis of cis-acting sequences and their interaction with the alpha-globin promoter.
Main Results:
- Remote regulatory elements of the alpha-globin cluster are activated during hematopoietic stem cell commitment and differentiation.
- These elements precisely control the spatial and temporal expression of the alpha-globin gene promoter, located 60 kb downstream.
Conclusions:
- Long-range gene regulation is crucial for developmental processes like red blood cell formation.
- Emerging themes suggest common principles in long-range gene regulation, although more loci require study.
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