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Related Experiment Videos

beta-YAC transgenic mice for studying LCR function

K R Peterson1, P A Navas, G Stamatoyannopoulos

  • 1Department of Medicine, University of Washington, Seattle 98195, USA. krpete@u.washington.edu

Annals of the New York Academy of Sciences
|July 21, 1998
PubMed
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Yeast artificial chromosomes (YACs) enable the study of globin gene regulation in mice. This technology allows for the creation of transgenic models that accurately mimic human genetic blood disorders like hereditary persistence of fetal hemoglobin (HPFH).

Area of Science:

  • Genetics
  • Molecular Biology
  • Developmental Biology

Background:

  • Yeast artificial chromosomes (YACs) offer a powerful tool for studying complex gene regulation.
  • The beta-globin locus is crucial for understanding red blood cell development and its disorders.
  • Previous methods lacked the ability to study large genomic regions and their regulatory elements comprehensively.

Purpose of the Study:

  • To develop and apply YAC-based transgenic mouse models for analyzing globin gene regulation.
  • To investigate the function of the Locus Control Region (LCR) and its elements.
  • To create accurate animal models for human globinopathies.

Main Methods:

  • Generation of transgenic mice using large (248 kb) beta-globin locus YACs (beta-YACs).

Related Experiment Videos

  • Introduction of specific mutations into the beta-YACs, including a -117 A gamma mutation and a deletion of LCR DNAse I-hypersensitive site 3 (5'HS3).
  • Analysis of globin gene expression and developmental regulation in the generated transgenic mice.

    • Main Results:

    • Wild-type beta-YAC transgenic mice exhibited proper developmental regulation of globin gene expression.
    • Mice carrying the mutant beta-YAC with the -117 A gamma mutation displayed the Greek hereditary persistence of fetal hemoglobin (HPFH) phenotype.
    • Transgenic mice with a deleted 5'HS3 in the beta-YAC provided insights into LCR function, suggesting redundant elements and core region importance.

    Conclusions:

    • YAC transgenics provide a robust platform for studying the entire globin locus and its regulation.
    • Mutant beta-YACs can successfully generate mouse models for human globin developmental mutants, like HPFH.
    • The LCR contains functionally redundant elements, and its core region is critical for globin gene activation, with individual elements modulating gene interactions.