Adenoviral vector-mediated delivery of glial cell line-derived neurotrophic factor provides neuroprotection in the aged parkinsonian rat.

1. The long-term delivery of neurotrophic factors to specific regions of the central nervous system via gene therapy offers a new strategy for the treatment of neurodegenerative disorders. 2. The neurotrophic factor glial cell line-derived neurotrophic factor (GDNF) is a potent dopaminergic (DA) trophic factor that ameliorates the behavioural and histological consequences of lesioning DA neurons in rodent and primate models of Parkinson's disease. 3. Glial cell line-derived neurotrophic factor gene therapy may have a potential use in the clinical treatment of Parkinson's disease. 4. We examined whether injection of an adenoviral vector encoding human GDNF preproprotein (Ad GDNF) could protect the rat nigrostriatal DA system from progressive neuronal degeneration. Because Parkinson's disease occurs primarily in the elderly population, we studied the effect of GDNF gene delivery in an aged rat model of Parkinson's disease. 5. In the aged (20 month) Fischer 344 rat, Ad GDNF was injected either near DA cell bodies in the substantia nigra (SN) or at the DA terminals in the striatum. One week following gene delivery, the neurotoxin 6-hydroxydopamine (6-OHDA) was injected unilaterally into the striatum to cause progressive degeneration of the DA neurons. 6. Injection of GDNF vector into either the striatum or the SN provided significant cell protection against 6-OHDA. However, only striatal injection of Ad GDNF protected against the development of behavioural and neurochemical changes that occur in the DA-depleted brain. 7. The results of this study are reviewed here and the behavioural and cellular effects of GDNF gene delivery into striatal versus mesencephalic sites are discussed.
AuthorsB Connor
JournalClinical and experimental pharmacology & physiology (Clin Exp Pharmacol Physiol) Vol. 28 Issue 11 Pg. 896-900 (Nov 2001) ISSN: 0305-1870 [Print] Australia
PMID11703392 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S., Review)
Chemical References
  • Gdnf protein, rat
  • Glial Cell Line-Derived Neurotrophic Factor
  • Nerve Growth Factors
  • Nerve Tissue Proteins
  • Neuroprotective Agents
  • Receptors, Dopamine
  • Adenoviridae (genetics)
  • Animals
  • Corpus Striatum (drug effects)
  • Disease Models, Animal
  • Gene Transfer Techniques
  • Genetic Therapy
  • Genetic Vectors
  • Glial Cell Line-Derived Neurotrophic Factor
  • Nerve Growth Factors
  • Nerve Tissue Proteins (genetics, therapeutic use)
  • Neurons (drug effects, metabolism)
  • Neuroprotective Agents (therapeutic use)
  • Parkinsonian Disorders (genetics, metabolism, therapy)
  • Rats
  • Receptors, Dopamine (metabolism)

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