Abstract:
:Several approaches to treat laminin alpha2 chain-deficient congenital muscular dystrophy (MDC1A) in mouse models have been undertaken. Most have shown promising results in young animals. However, older animals have only been characterized to some extent. Herein we analyze the lifespan of laminin alpha2 chain-deficient mice with transgenic overexpression of laminin alpha1 chain. Further outcome measures included internalized myonuclei, heart fibrosis, grip strength, and serum creatine kinase activity. We show that laminin alpha2-chain-deficient animals that overexpress laminin alpha1 chain survive to up to 1.5-2 years of age. Furthermore, they displayed improved skeletal and heart muscle morphology, near-normal muscle strength, and normalized creatine kinase levels. Such an improvement of the dystrophic phenotype that persists to old age has not been previously demonstrated in mice. Our findings hold promise with regard to the efficient treatment of MDC1A patients in the future.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Gawlik KI,Durbeej Mdoi
10.1002/mus.21616subject
Has Abstractpub_date
2010-07-01 00:00:00pages
30-7issue
1eissn
0148-639Xissn
1097-4598journal_volume
42pub_type
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