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. 2006 Nov 28;3(4):451–456. doi: 10.1016/j.ddstr.2006.10.008
Issues
 • Blood brain barrier
 • Diversity of cell types and complex neuronal networking
 • Choice of disease model, duration of treatment, choice of target(s)



Possible delivery modalities
 • Intracranial injections
 • Transfection (oncoretrovirus, lentivirus, adenovirus, adeno associated virus, others)
 • Electroporation
 • Osmotic minipump infusions, i.c.v. or intrathecal