Many of the problems and hopes associated with gene therapyare exemplified in preclinical studies of genetically alteredmuscle cells (skeletal, cardiac, and smooth). Smooth-musclecells of the arterial wall are being genetically engineeredto synthesize growth inhibitors that might prevent restenosisafter balloon angioplasty. In animal models, the injection intocardiac muscle of genes that induce new vessel formation maylead to increased blood flow. Perhaps most surprising is thefinding that skeletal-muscle cells can be used as recombinant-proteinfactories that produce and secrete proteins that can act eitherlocally in muscle or distally.
From the Department of Molecular Pharmacology, Stanford University School of Medicine, Stanford, CA 94305-5332, where reprint requests should be addressed to Dr. Blau.
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