Abstract
The anti-Parkinson drug rasagiline (Azilect), an irreversible and selective monoamine oxidase (MAO)-B inhibitor, was shown to possess neuroprotective activities, involving multiple survival pathways among them the up-regulation of protein kinase C (PKC)α, PKCε, the anti-apoptotic Bcl-2, Bcl-xL, and Bcl-w and the induction of brain-derived- and glial cell line-derived neurotrophic factors (BDNF, GDNF). More recently, employing conventional neurochemical techniques, as well as transcriptomic and proteomic screening tools, combined with a biology-based clustering method, it was shown that rasagiline also possesses neurorescue/neurogenesis activity in mice midbrain dopaminergic neurons when given chronically, post-MPTP (N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine). This action was attributed to the activation of cell signaling mediators associated with neurotrophic factors responsive-tyrosine kinase receptor (Trk) pathway, including ShcC, SOS, AF6, Rin1, and Ras and the increase in the Trk-downstream effecter phosphatidylinositol 3 kinase (PI3K) protein and its substrate, Akt/PKB. It is interesting to determine whether a similar effect is seen in Parkinsonian patients after long-term treatment with rasagiline, which may have implications as a possible disease modifying agent.
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Notes
The abstract entitled “Early rasagiline therapy shows long-term benefit for Parkinson’s disease” was presented by the Parkinson Study group in the 9th International Congress of Parkinson’s disease and Movement Disorder, New Orleans, 2005.
Abbreviations
- BDNF:
-
Brain-derived neurotrophic factor
- DA:
-
Dopamine
- Fasl:
-
Fas ligand
- GDNF:
-
Glial cell line-derived neurotrophic factor
- GSK:
-
Glycogen synthase kinase
- mGluR:
-
Metabotropic glutamate receptor
- MAO:
-
Monoamine oxidase
- MPP+:
-
1 Methyl-4 phenylpyridinium
- MPTP:
-
N-methyl- 4 phenyl 1,2,3,6 tetrahydropyridine
- NGF:
-
Nerve growth factor
- PI3K:
-
Phosphatidylinositol 3 Kinase
- PD:
-
Parkinson’s disease
- PKC:
-
Protein kinase C
- SNpc:
-
Substantia nigra pars compacta
- TH:
-
Tyrosine hydroxylase
- Trk:
-
Tyrosine receptor kinase
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Acknowledgments
The support of Teva Pharmaceutical Co. (Netanya, Israel) and Technion-Research and Development (Haifa, Israel), Michael J. Fox Foundation (New York, USA) and National Parkinson Foundation (Miami, USA) are gratefully acknowledged.
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Special issue dedicated to Dr. Moussa Youdim.
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Mandel, S.A., Sagi, Y. & Amit, T. Rasagiline Promotes Regeneration of Substantia Nigra Dopaminergic Neurons in Post-MPTP-induced Parkinsonism via Activation of Tyrosine Kinase Receptor Signaling Pathway. Neurochem Res 32, 1694–1699 (2007). https://doi.org/10.1007/s11064-007-9351-8
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DOI: https://doi.org/10.1007/s11064-007-9351-8