Developmental regulation of human-like globin gene expression is controlled by several factors, primarily the trans-acting transcriptional milieu and cis-acting DNA elements. Identifying these DNA sequences and understanding the cis regulatory mechanisms underlying globin gene switching are essential to the development of therapeutic strategies for treatment of hemoglobinopathies such as sickle cell disease and B-thalassemias. The parent grant to this project, R01 HL67336, """"""""Locus-linked Regulatory Motifs of Globin Gene Switching,"""""""" has been investigating the function of these DNA regulatory regions using transgenic mice or routine cell lines. However, studies of globin gene expression in human cell lines may provide novel insights into globin gene regulation not revealed in mouse systems. Thus, the goal of this supplement application is to implement the use of human embryonic stem cells (hESCs) for broad-based studies of B-like globin gene switching, with an initial emphasis on examining the role of the human B-globin LCR at its endogenous genomic location.
Specific Aim 1 will establish hESC line H1 culture conditions and define the parameters necessary to derive erythroid cells from this line.
In Specific Aim 2, a hESC line H1 genomic library will be constructed for use in current and future gene targeting applications. The goal of Specific Aim 3 will be to produce mutations within the LCR to test its function within the native human globin locus. This will be accomplished by deleting the LCR or replacing it with the CMV enhancer or the B-globin HS -40 control region. These modified ES cells will be used to test whether locus chromatin is open or closed in the absence of the B-globin LCR. Replacement of the LCR with alternate enhancers will test whether the human B-globin LCR functions exclusively as an enhancer or has additional roles in the temporal regulation of downstream genes.
Specific Aim 4 will analyze the expression of the murine B-like globin genes in human cells to better understand the evolutionary relationships and conservation of gene regulation and expression patterns between these two species. ? ?

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
3R01HL067336-03S1
Application #
6743519
Study Section
Special Emphasis Panel (ZRG1-CDF-5 (50))
Program Officer
Evans, Gregory
Project Start
2001-06-15
Project End
2005-05-31
Budget Start
2003-09-22
Budget End
2004-05-31
Support Year
3
Fiscal Year
2003
Total Cost
$73,500
Indirect Cost
Name
University of Kansas
Department
Biochemistry
Type
Schools of Medicine
DUNS #
016060860
City
Kansas City
State
KS
Country
United States
Zip Code
66160
Peterson, Kenneth R; Costa, Flávia C; Fedosyuk, Halyna et al. (2014) A cell-based high-throughput screen for novel chemical inducers of fetal hemoglobin for treatment of hemoglobinopathies. PLoS One 9:e107006
Peterson, Kenneth R; Fedosyuk, Halyna; Harju-Baker, Susanna (2012) LCR 5' hypersensitive site specificity for globin gene activation within the active chromatin hub. Nucleic Acids Res 40:11256-69
Costa, Flávia C; Fedosyuk, Halyna; Chazelle, Allen M et al. (2012) Mi2? is required for ?-globin gene silencing: temporal assembly of a GATA-1-FOG-1-Mi2 repressor complex in ?-YAC transgenic mice. PLoS Genet 8:e1003155
Harju-Baker, Susanna; Costa, Flavia C; Fedosyuk, Halyna et al. (2008) Silencing of Agamma-globin gene expression during adult definitive erythropoiesis mediated by GATA-1-FOG-1-Mi2 complex binding at the -566 GATA site. Mol Cell Biol 28:3101-13
Fedosyuk, Halyna; Peterson, Kenneth R (2007) Deletion of the human beta-globin LCR 5'HS4 or 5'HS1 differentially affects beta-like globin gene expression in beta-YAC transgenic mice. Blood Cells Mol Dis 39:44-55
Blau, C Anthony; Peterson, Kenneth R (2006) Establishment of cell lines that exhibit correct ontogenic stage-specific gene expression profiles from tissues of yeast artificial chromosome transgenic mice using chemically induced growth signals. Methods Mol Biol 349:163-73
Harju, Susanna; Navas, Patrick A; Stamatoyannopoulos, George et al. (2005) Genome architecture of the human beta-globin locus affects developmental regulation of gene expression. Mol Cell Biol 25:8765-78
Blau, C Anthony; Barbas 3rd, Carlos F; Bomhoff, Anna L et al. (2005) {gamma}-Globin gene expression in chemical inducer of dimerization (CID)-dependent multipotential cells established from human {beta}-globin locus yeast artificial chromosome ({beta}-YAC) transgenic mice. J Biol Chem 280:36642-7
Harju, Susanna; Fedosyuk, Halyna; Peterson, Kenneth R (2004) Rapid isolation of yeast genomic DNA: Bust n' Grab. BMC Biotechnol 4:8
Peterson, Kenneth R (2003) Transgenic mice carrying yeast artificial chromosomes. Expert Rev Mol Med 5:1-25

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