期刊
JOURNAL OF NEUROSCIENCE METHODS
卷 251, 期 -, 页码 120-129出版社
ELSEVIER
DOI: 10.1016/j.jneumeth.2015.05.006
关键词
6-Hydroxydopamine; Nigrostriatal pathway; Neurochemistry; Neuroprotection; Peptide; Intranasal administration
资金
- NINDS [NS039787, NS060924, NS075694]
- National Center for Research Resources and the National Center for Advancing Translational Sciences, National Institutes of Health [UL1RR033173]
- NIA [AG013494, T32-AG000242]
- Kentucky INBRE Pilot [NCRR 5P20RR016481-12, NIGMS 8 P20 GM103436-12]
- Endowed Chair Funds
- Dupree Trust
- Estate of Laura C. Miller
- PhRMA Foundation
- Columbus Foundation
- University of Kentucky College of Medicine Start-up Funds
Background: To circumvent the challenges associated with delivering large compounds directly to the brain for the treatment of Parkinson's disease (PD), non-invasive procedures utilizing smaller molecules with protective and/or restorative actions on dopaminergic neurons are needed. New method: We developed a methodology for evaluating the effects of a synthetic neuroactive peptide, DNSP-11, on the nigrostriatal system using repeated intranasal delivery in both normal and a unilateral 6-hydroxydopamine (6-OHDA) lesion rat model of PD. Results: Normal rats repeatedly administered varying doses of DNSP-11 intranasally for 3 weeks exhibited a significant increase in dopamine (DA) turnover in both the striatum and substantia nigra (SN) at 300 mu g, suggestive of a stimulative effect of the dopaminergic system. Additionally, a protective effect was observed following repeated intranasal administration in 6-OHDA lesioned rats, as suggested by: a significant decrease in d-amphetamine-induced rotation at 2 weeks; a decrease in DA turnover in the lesioned striatum; and an increased sparing of tyrosine hydroxylase (TH) positive (+) neurons in a specific sub-region of the lesioned substantia nigra pars compacta (SNpc). Finally, tracer studies showed I-125-DNSP-11 distributed diffusely throughout the brain, including the striatum and SN, as quickly as 30 min after a single intranasal dose. Comparison with existing methods: The results of bilateral intranasal administration of DNSP-11 are compared to our unilateral single infusion studies to the brain in rats. Conclusions: These studies support that DNSP-11 can be delivered intranasally and maintain its neuroactive properties in both normal rats and in a unilateral 6-OHDA rat model of PD. (C) 2015 Elsevier B.V. All rights reserved.
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