Gene therapy may benefit human neurological disorders such as Alzheimer~s disease (AD). Grafting cells to the brain that are genetically modified to produce neurotrophic factors, neurotransmitters or other therapeutic agents can achieve specific intraparenchymal drug delivery in a chronic and well-tolerated manner. In AD, gene therapy could provide a means for delivering neurotrophic factors such as NGF to degenerating neurons in the cholinergic basal forebrain and other regions, or for augmenting neurotransmitter function in the cortex, hippocampus, and other regions. Gene therapy could also ultimately provide a means of manipulating the expression of various genes involved in generating AD pathology. In the first five-year period of this grant, optimal parameters for transducing primary primate cells to produce neurotrophic factors and neurotransmitters in vitro have been developed. Optimal conditions for grafting genetically modified cells to the brain have been established. When grafted to the cholinergic basal forebrain, NGF-producing cells express NGF protein and prevent cholinergic neuronal degeneration for at least 8 months. New models of spontaneous age-related cholinergic neuronal degeneration have also been characterized. The next five-year period of this primate project will determine 1) whether NGF gene therapy will prevent lesion-induced and spontaneous age-related declines in basal forebrain cholinergic neuronal morphology and behavioral function for prolonged periods of up to two years, 2) if neurotransmitter replacement by gene therapy will ameliorate lesion-induced and spontaneous age-related declines in cholinergic biochemistry and behavioral function, as recently shown in rats, and 3) if the in vivo efficacy and safety of gene therapy for future clinical trials in AD can be enhanced by serial MRI and PET imaging, use of regulatable promoters for controlling in vivo gene expression, and direct in vivo genetic modification of primary nervous system cells such as neurons and glia by adenovirus, adeno-associated virus, and HIV vectors.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Program Projects (P01)
Project #
2P01AG010435-08
Application #
6267548
Study Section
Project Start
1998-03-01
Project End
1999-02-28
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
8
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Salk Institute for Biological Studies
Department
Type
DUNS #
005436803
City
La Jolla
State
CA
Country
United States
Zip Code
92037
Nagahara, Alan H; Wilson, Bayard R; Ivasyk, Iryna et al. (2018) MR-guided delivery of AAV2-BDNF into the entorhinal cortex of non-human primates. Gene Ther 25:104-114
Chen, Zhijiang; Donnelly, Christopher R; Dominguez, Bertha et al. (2017) p75 Is Required for the Establishment of Postnatal Sensory Neuron Diversity by Potentiating Ret Signaling. Cell Rep 21:707-720
Hirai, Maretoshi; Arita, Yoh; McGlade, C Jane et al. (2017) Adaptor proteins NUMB and NUMBL promote cell cycle withdrawal by targeting ERBB2 for degradation. J Clin Invest 127:569-582
Overk, Cassia; Masliah, Eliezer (2017) Perspective on the calcium dyshomeostasis hypothesis in the pathogenesis of selective neuronal degeneration in animal models of Alzheimer's disease. Alzheimers Dement 13:183-185
Spencer, Brian; Desplats, Paula A; Overk, Cassia R et al. (2016) Reducing Endogenous ?-Synuclein Mitigates the Degeneration of Selective Neuronal Populations in an Alzheimer's Disease Transgenic Mouse Model. J Neurosci 36:7971-84
Xu, Jiqing; de Winter, Fred; Farrokhi, Catherine et al. (2016) Neuregulin 1 improves cognitive deficits and neuropathology in an Alzheimer's disease model. Sci Rep 6:31692
Spencer, Brian; Potkar, Rewati; Metcalf, Jeff et al. (2016) Systemic Central Nervous System (CNS)-targeted Delivery of Neuropeptide Y (NPY) Reduces Neurodegeneration and Increases Neural Precursor Cell Proliferation in a Mouse Model of Alzheimer Disease. J Biol Chem 291:1905-20
Wang, Ling; Conner, James M; Nagahara, Alan H et al. (2016) Rehabilitation drives enhancement of neuronal structure in functionally relevant neuronal subsets. Proc Natl Acad Sci U S A 113:2750-5
Valera, Elvira; Masliah, Eliezer (2016) Combination therapies: The next logical Step for the treatment of synucleinopathies? Mov Disord 31:225-34
Kratter, Ian H; Zahed, Hengameh; Lau, Alice et al. (2016) Serine 421 regulates mutant huntingtin toxicity and clearance in mice. J Clin Invest 126:3585-97

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