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| Content Provider | Springer Nature Link |
|---|---|
| Author | El Massri, Nabil Lemgruber, Ana P. Rowe, Isobel J. Moro, Cécile Torres, Napoleon Reinhart, Florian Chabrol, Claude Benabid, Alim Louis Mitrofanis, John |
| Copyright Year | 2017 |
| Abstract | Intracranial application of red to infrared light, known also as photobiomodulation (PBM), has been shown to improve locomotor activity and to neuroprotect midbrain dopaminergic cells in rodent and monkey models of Parkinson’s disease. In this study, we explored whether PBM has any influence on the number of tyrosine hydroxylase (TH)+cells and the expression of GDNF (glial-derived neurotrophic factor) in the striatum. Striatal sections of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine)-treated mice and monkeys and 6-hydroxydopamine (6OHDA)-lesioned rats that had PBM optical fibres implanted intracranially (or not) were processed for immunohistochemistry (all species) or western blot analysis (monkeys). In our MPTP monkey model, which showed a clear loss in striatal dopaminergic terminations, PBM generated a striking increase in striatal TH+ cell number, 60% higher compared to MPTP monkeys not treated with PBM and 80% higher than controls. This increase was not evident in our MPTP mouse and 6OHDA rat models, both of which showed minimal loss in striatal terminations. In monkeys, the increase in striatal TH+ cell number in MPTP-PBM cases was accompanied by similar increases in GDNF expression, as determined from western blots, from MPTP and control cases. In summary, these results offer insights into the mechanisms by which PBM generates its beneficial effects, potentially with the use of trophic factors, such as GDNF. |
| Starting Page | 1861 |
| Ending Page | 1874 |
| Page Count | 14 |
| File Format | |
| ISSN | 00144819 |
| Journal | Experimental Brain Research |
| Volume Number | 235 |
| Issue Number | 6 |
| e-ISSN | 14321106 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2017-03-15 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Putamen Caudate MPTP 6OHDA Near infrared light 670 nm Neurosciences Neurology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience |
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