Myotonic dystrophy (DM1), the most common form of muscular dystrophy in adults and children, is a multi- systemic, autosomal dominant genetic disorder caused by a mutation that leads to the production of a mutant RNA that is toxic to cells. Currently there are no therapies for DM1. Muscle weakness and wasting are major debilitating factors in DM1 and yet very little is known about the molecular mediators or muscle pathology in DM1. We have developed a mouse model of RNA toxicity in which we have demonstrated reversal of muscle pathology by silencing the toxic RNA. We have used this model to identify new molecules, mechanisms and pathways involved in RNA toxicity in DM1. This particular grant is designed to use genetic analysis and therapeutic trials in our mouse model to address the role of one of the novel molecules that we have identified in order to assess its potential as a viable therapeutic target. This novel finding opens new opportunities for: 1) understanding muscle degeneration, and perhaps cardiac pathology in DM1 and 2) developing new therapies to treat muscular dystrophy in DM1.

Public Health Relevance

Myotonic dystrophy (DM1) is the most common form of muscular dystrophy in adults and children. Currently there are no therapies. Muscle weakness and wasting are major debilitating factors. We have a novel finding that opens new opportunities for: 1) understanding muscle degeneration, and cardiac problems in DM1 and 2) developing new therapies to treat muscular dystrophy in DM1.

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Research Project (R01)
Project #
5R01AR062189-02
Application #
8331374
Study Section
Skeletal Muscle and Exercise Physiology Study Section (SMEP)
Program Officer
Nuckolls, Glen H
Project Start
2011-09-15
Project End
2016-07-31
Budget Start
2012-08-01
Budget End
2013-07-31
Support Year
2
Fiscal Year
2012
Total Cost
$346,500
Indirect Cost
$121,500
Name
University of Virginia
Department
Pathology
Type
Schools of Medicine
DUNS #
065391526
City
Charlottesville
State
VA
Country
United States
Zip Code
22904
Yadava, Ramesh S; Foff, Erin P; Yu, Qing et al. (2015) TWEAK/Fn14, a pathway and novel therapeutic target in myotonic dystrophy. Hum Mol Genet 24:2035-48
Gladman, Jordan T; Yadava, Ramesh S; Mandal, Mahua et al. (2015) NKX2-5, a modifier of skeletal muscle pathology due to RNA toxicity. Hum Mol Genet 24:251-64
Ravel-Chapuis, Aymeric; Bélanger, Guy; Yadava, Ramesh S et al. (2012) The RNA-binding protein Staufen1 is increased in DM1 skeletal muscle and promotes alternative pre-mRNA splicing. J Cell Biol 196:699-712
Mahadevan, Mani S (2012) Myotonic dystrophy: is a narrow focus obscuring the rest of the field? Curr Opin Neurol 25:609-13
Foff, Erin Pennock; Mahadevan, Mani S (2011) Therapeutics development in myotonic dystrophy type 1. Muscle Nerve 44:160-9