Related Experiment Video
Updated: May 28, 2026
09:39
Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
Published on: July 29, 2016
GREG cells, a dysferlin-deficient myogenic mouse cell line
Glen W Humphrey1, Elena Mekhedov, Paul S Blank
1Program in Physical Biology, Eunice Kennedy Schriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
Experimental Cell Research
|October 25, 2011
Summary
Researchers created a dysferlin-deficient cell line (GREG cells) to study muscle wasting diseases. GREG myotubes showed impaired membrane repair, highlighting dysferlin
Area of Science:
- Muscle biology
- Cellular membrane repair
- Genetic disease modeling
Background:
- Dysferlinopathies, such as LGMD2b and Myoshi myopathy, are progressive muscle wasting disorders.
- Dysferlin is crucial for maintaining muscle fiber plasma membrane integrity.
- Understanding dysferlin's function is vital for developing therapeutic strategies.
Purpose of the Study:
- To establish a dysferlin-deficient myogenic cell line for studying dysferlin function.
- To analyze the role of dysferlin in muscle cell plasma membrane repair.
- To investigate potential compensatory mechanisms in dysferlin-deficient muscle cells.
Main Methods:
- Generation of a dysferlin-deficient myogenic cell line (GREG cells) from A/J mice.
- Culturing GREG cells and inducing differentiation into myotubes.
- Assessing plasma membrane repair capacity using laser wounding and FM1-43 dye uptake.
Main Results:
- GREG cells exhibited no detectable dysferlin expression but maintained normal proliferation and fusion.
- GREG myotubes demonstrated significant deficiencies in plasma membrane repair.
- Approximately 66% of GREG myotubes lacked membrane repair capacity, unlike normal C2C12 myotubes.
Conclusions:
- The GREG cell line serves as a valuable model for dysferlinopathy research.
- Dysferlin deficiency directly impairs muscle cell plasma membrane repair.
- Observed heterogeneity in membrane resealing may indicate genetic compensation in dysferlin deficiency.
