Human Molecular Genetics Advance Access published online on March 9, 2005
Human Molecular Genetics, doi:10.1093/hmg/ddi095
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1 Boston Biomedical Research Institute, 64 Grove Street, Watertown MA 02472; Department of Neurology, Harvard Medical School, Boston, MA 02115
* To whom correspondence should be addressed. To examine the role of apoptosis in neuromuscular disease progression, we have determined if pathogenesis in dystrophin-deficient (mdx) and laminin
Article
Muscle-specific BCL2 expression ameliorates muscle disease in laminin
2-deficient, but not dystrophin-deficient, mice
2 Boston Biomedical Research Institute, 64 Grove Street, Watertown MA 02472
Janice A. Dominov, E-mail: Dominov{at}bbri.org
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Abstract
2-deficient (Lama2-null) mice is ameliorated by overexpression of the anti-apoptosis protein BCL2 in diseased muscles. The mdx mice are a model for the human disease, Duchenne Muscular Dystrophy (DMD), and the Lama2-null mice are a model for human Congenital Muscular Dystrophy Type 1A (MDC1A). For these studies, we generated transgenic mice that overexpressed human BCL2 under control of muscle-specific MyoD or MRF4 promoter fragments. We then used cross-breeding to introduce the transgenes into diseased mdx or Lama2-null mice. In mdx mice, we found that overexpression of BCL2 failed to produce any significant differences in muscle pathology. In the Lama2-null mice, in contrast, we found that muscle-specific expression of BCL2 led to a several-fold increase in lifespan and an increased growth rate. Thus, BCL2-mediated apoptosis appears to play a significant role in pathogenesis in laminin
2-deficiency, but not dystrophin-deficiency, suggesting that therapies designed to ameliorate disease by inhibition of apoptosis are more likely to succeed in MDC1A than in DMD.![]()
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