Table 2

Strategies for gene therapy in the CNS using viral vectors

Reprinted by permission of Oxford University Press from ref 53.
(1)Replace missing or defective gene
(2)Replace or enhance local growth factors or enzyme production
(3)Virus directed enzyme pro-drug treatment
(4)Direct cell killing of CNS tumours
(5)Delivery of anti-sense sequences to particular genes
(6)Use of inserted DNA to increase cellular antigen expression, to boost immune response