Abstract
Nerve Growth Factor (NGF) has therapeutic effects on the cholinergic neurodegeneration in Alzheimer's disease (AD). We have previously described an implantable Encapsulated Cell Biodelivery™ device, NsG0202, capable of local delivery of NGF to the human cholinergic basal forebrain. Results from a small Phase 1b clinical study showed that the NGF dose could advantageously be increased. We have therefore developed a second generation clinical device named NsG0202.1, containing an RPE cell line (NGC0211) generated with transposon expression technology for high- dose NGF production. Furthermore, to promote cell attachment and long-term viability of NGC0211, a polyethylene terephthalate (PET) yarn scaffolding was used. The safety was tested in Gottingen minipigs during a six months period with NsG0202.1 implants placed in the basal forebrain. The devices were well tolerated and the NGC0211 viability and NGF secretion remained after 6 months in vivo. The NGF induced relevant biological responses in the surrounding cholinergic target neurons.
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