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SCID mice containing muscle with human mitochondrial DNA mutations - An animal model for mitochondrial DNA defects

Title
SCID mice containing muscle with human mitochondrial DNA mutations - An animal model for mitochondrial DNA defects
Type
Article in International Scientific Journal
Year
1998
Authors
Clark, KM
(Author)
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Watt, DJ
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Lightowlers, RN
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Johnson, MA
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Relvas, JB
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Taanman, JW
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Turnbull, DM
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Journal
Vol. 102
Pages: 2090-2095
ISSN: 0021-9738
Other information
Authenticus ID: P-00F-NZ8
Abstract (EN): Defects of the mitochondrial genome are important causes of disease. Despite major advances in our investigation of patients, there is no effective therapy. Progress in this area is limited by the absence of any animal models in which we can evaluate treatment. To develop such a model we have injected human myoblasts into the tibialis anterior of SCID mice after inducing necrosis, After injection of normal human myoblasts, regenerating fibers expressed human P-spectrin, confirming they were derived from fusion of human myoblasts. The stability of the muscle fibers was inferred by demonstrating the formation of motor end plates on the regenerating fibers. In addition, we show the presence of human cytochrome c oxidase subunit II, which is encoded by the mitochondrial genome, in the regenerated fibers. After injection of human myoblasts containing either the A8344G or the T8993C heteroplasmic mitochondrial DNA mutations, human P-spectrin positive fibers were found to contain the mutation at a similar level to the injected myoblasts. These studies highlight the potential value of this model for the study of mitochondrial DNA defects.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
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