Crews, Leslie and Mizuno, Hideya and Desplats, Paula and Rockenstein, Edward and Adame, Anthony and Patrick, Christina and Winner, Beate and Winkler, Juergen and Masliah, Eliezer (2008) alpha-synuclein alters notch-1 expression and neurogenesis in mouse embryonic stem cells and in the hippocampus of transgenic mice. JOURNAL OF NEUROSCIENCE, 28 (16). pp. 4250-4260. ISSN 0270-6474,
Full text not available from this repository. (Request a copy)Abstract
Altered expression and mutations in alpha-synuclein (alpha-syn) have been linked to Parkinson's disease (PD) and related disorders. The neurological alterations in PD patients have been associated with degeneration of dopaminergic cells and other neuronal populations. Moreover, recent studies in murine models have shown that alterations in neurogenesis might also contribute to the neurodegenerative phenotype. However, the mechanisms involved and the effects of alpha-syn expression on neurogenesis are not yet clear. To this end, murine embryonic stem (mES) cells were infected with lentiviral (LV) vectors expressing wild-type (WT) and mutant alpha-syn. Compared with mES cells infected with LV-green fluorescent protein (GFP), cells expressing WT and mutant alpha-syn showed reduced proliferation as indicated by lower 5-bromo-2 alpha-deoxyuridine uptake, increased apoptosis, and reduced expression of neuronal markers such as neuron specific enolase and alpha-III tubulin. The alterations in neurogenesis in alpha-syn-expressing mES cells were accompanied by a reduction in Notch-1 and Hairy and enhancer of split-5 (Hes-5) mRNA and protein levels. Moreover, levels of total Notch-1 and Notch intracellular domain (NICD) were lower in mEScells expressing WT and mutant alpha-syn compared with GFP controls. The reduced survival of alpha-syn-expressing mES cells was reverted by overexpressing constitutively active NICD. Similarly, in alpha-syn transgenic mice, the alterations in neurogenesis in the hippocampal subgranular zone were accompanied by decreased Notch-1, NICD, and Hes-5 expression. Together, these results suggest that accumulation of alpha-syn might impair survival of NPCs by interfering with the Notch signaling pathway. Similar mechanisms could be at play in PD and Lewy body disease.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LEWY-BODY-DISEASE; CENTRAL-NERVOUS-SYSTEM; A-BETA COMPONENT; PARKINSONS-DISEASE; ALZHEIMERS-DISEASE; NEURODEGENERATIVE DISORDERS; PATHOLOGICAL RESEARCH; PRESYNAPTIC PROTEIN; LENTIVIRAL VECTOR; PRECURSOR PROTEIN; alpha-synuclein; Parkinson's disease; neurogenesis; differentiation; stem cells; dentate gyrus |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Neurologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Nov 2020 07:48 |
| Last Modified: | 04 Nov 2020 07:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31040 |
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