This project addresses several basic questions of skeletal muscle biology: (a.) how do mesodermal cells become determined to enter the skeletal muscle cell lineage? (b.) how are muscle satellite cells derived? (c.) how are skeletal muscle genes activated in response to growth factor deprivation? (d.) how are quantitative modulations in gene expression controlled with respect to fast and slow muscle fiber types? The specific aims are: [1.] Identification of M-creatine kinase (MCK) gene control elements. Major emphasis will be on a 206 nt enhancer which contains multiple control and factor-binding elements. Related studies will continue analysis of other regulatory regions, and will search for locus control regions. Complementary transgenic studies will evaluate what appear to be the more critical control elements in adult and embryonic mice. [2.] Analysis of muscle fiber type control of MCK expression. Preliminary results demonstrating differential expression of 3 MCK transgenes in fast and slow muscle fibers will be pursued in vitro using fast and slow muscle cell lines. Control elements defined in cell culture assays will be confirmed in the fully functional muscles of additional transgenic mice. [3.] Isolation and functional characterization of factors that bind MCK gene control elements. Factor binding analyses will continue with elements identified in Aims 1 & 2. Factors identified via cDNA library screening will be analyzed for their behavior during terminal differentiation, for their expression during development, and for their presence in fast and slow fiber types. Later studies will investigate the control of selected transcription factor genes. [4.] Analysis of skeletal muscle determination. Cellular and molecular environments required for activating myogenic determination genes in mesodermal cells will be studied in culture. [5.] Mechanism of satellite cell formation. Time-lapse videomicroscopy coupled with single cell assays for muscle gene activation, growth factor receptors and myogenic determination factors will be used to determine how myoblasts enter a quiescent satellite cell state. Results from this project should be applicable to skeletal muscle diseases, gene therapy, and the surgical reconstruction of injured muscle tissue.

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Method to Extend Research in Time (MERIT) Award (R37)
Project #
2R37AR018860-17
Application #
3481467
Study Section
Molecular Cytology Study Section (CTY)
Project Start
1976-05-01
Project End
1997-12-31
Budget Start
1993-01-01
Budget End
1993-12-31
Support Year
17
Fiscal Year
1993
Total Cost
Indirect Cost
Name
University of Washington
Department
Type
Schools of Medicine
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195
Amoasii, Leonela; Long, Chengzu; Li, Hui et al. (2017) Single-cut genome editing restores dystrophin expression in a new mouse model of muscular dystrophy. Sci Transl Med 9:
Frock, Richard L; Kudlow, Brian A; Evans, Angela M et al. (2006) Lamin A/C and emerin are critical for skeletal muscle satellite cell differentiation. Genes Dev 20:486-500
Gaedigk, Roger; Law, Douglas J; Fitzgerald-Gustafson, Kathleen M et al. (2006) Improvement in survival and muscle function in an mdx/utrn(-/-) double mutant mouse using a human retinal dystrophin transgene. Neuromuscul Disord 16:192-203
Li, S; Kimura, E; Fall, B M et al. (2005) Stable transduction of myogenic cells with lentiviral vectors expressing a minidystrophin. Gene Ther 12:1099-108
Himeda, Charis L; Ranish, Jeffrey A; Angello, John C et al. (2004) Quantitative proteomic identification of six4 as the trex-binding factor in the muscle creatine kinase enhancer. Mol Cell Biol 24:2132-43
Dell'Agnola, Chiara; Wang, Zejing; Storb, Rainer et al. (2004) Hematopoietic stem cell transplantation does not restore dystrophin expression in Duchenne muscular dystrophy dogs. Blood 104:4311-8
Nguyen, Quynh-Giao V; Buskin, Jean N; Himeda, Charis L et al. (2003) Transgenic and tissue culture analyses of the muscle creatine kinase enhancer Trex control element in skeletal and cardiac muscle indicate differences in gene expression between muscle types. Transgenic Res 12:337-49
Nguyen, Quynh-Giao V; Buskin, Jean N; Himeda, Charis L et al. (2003) Differences in the function of three conserved E-boxes of the muscle creatine kinase gene in cultured myocytes and in transgenic mouse skeletal and cardiac muscle. J Biol Chem 278:46494-505
Kiefer, J C; Hauschka, S D (2001) Myf-5 is transiently expressed in nonmuscle mesoderm and exhibits dynamic regional changes within the presegmented mesoderm and somites I-IV. Dev Biol 232:77-90
Pirskanen, A; Kiefer, J C; Hauschka, S D (2000) IGFs, insulin, Shh, bFGF, and TGF-beta1 interact synergistically to promote somite myogenesis in vitro. Dev Biol 224:189-203

Showing the most recent 10 out of 26 publications