AN ADENOVIRAL VECTOR CAN TRANSFER LACZ EXPRESSION INTO SCHWANN-CELLS IN CULTURE AND IN SCIATIC-NERVE

Although a number of genetic defects in the P0, peripheral myelin prot ein-22, and connexin-32 genes recently were shown to cause the demyeli nating forms of Charcot-Marie-Tooth disease, there is yet no effective treatment for these patients. Recent studies showed that replication defective adenoviral vectors can efficiently introduce genes into musc le, brain, lung, and other tissues, suggesting that this vector system may be useful for the treatment of a number of genetic diseases. In t his work, we demonstrated that a replication deficient adenovirus expr essing the Escherichia coli beta-galactosidase gene (AdCMVLacZ) can in troduce genes into Schwann cells, in culture as well as in sciatic ner ve. Schwann cells cultured at a multiplicity of infection of 250:1 did not demonstrate cytopathic effects. Following injection of AdCMVLacZ into sciatic nerve of rats, lacZ-expressing, myelinating Schwann cells could be detected for at least 45 days. These data suggest that in th e future, these vectors may be useful both in perturbing Schwann cell gene expression and in designing therapies for the treatment of Charco t-Marie-Tooth disease.