Failure of diphtheria toxin model to induce parkinson-like behavior in mice
- Rodent models of Parkinson’s disease are based on transgenic expression of mutant synuclein, deletion of PD genes, injections of MPTP or rotenone, or seeding of synuclein fibrils. The models show histopathologic features of PD such as Lewi bodies but mostly only subtle in vivo manifestations or systemic toxicity. The models only partly mimic a predominant loss of dopaminergic neurons in the substantia nigra. We therefore generated mice that express the transgenic diphtheria toxin receptor (DTR) specifically in DA neurons by crossing DAT-Cre mice with Rosa26 loxP-STOP-loxP DTR mice. After defining a well-tolerated DTx dose, DAT-DTR and DTR-flfl controls were subjected to non-toxic DTx treatment (5 × 100 pg/g) and subsequent histology and behavioral tests. DAT protein levels were reduced in the midbrain, and tyrosine hydroxylase-positive neurons were reduced in the substantia nigra, whereas the pan-neuronal marker NeuN was not affected. Despite the promising histologic results, there was no difference in motor function tests or open field behavior. These are tests in which double mutant Pink1−/−SNCAA53T Parkinson mice show behavioral abnormalities. Higher doses of DTx were toxic in both groups. The data suggest that DTx treatment in mice with Cre/loxP-driven DAT-DTR expression leads to partial ablation of DA-neurons but without PD-reminiscent behavioral correlates.
Author: | Lucie ValekORCiDGND, Irmgard TegederORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-634541 |
DOI: | https://doi.org/10.3390/ijms22179496 |
ISSN: | 1422-0067 |
Parent Title (English): | International journal of molecular sciences |
Publisher: | Molecular Diversity Preservation International |
Place of publication: | Basel |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2021/08/31 |
Date of first Publication: | 2021/08/31 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2022/01/25 |
Tag: | Cre-recombinase; SLC6a3; diphtheria toxin; dopamine transporter; motor functions; open field behavior; tyrosine hydroxylase |
Volume: | 22 |
Issue: | 17, art. 9496 |
Page Number: | 14 |
First Page: | 1 |
Last Page: | 14 |
Note: | The study was supported by the Deutsche Forschungsgemeinschaft, DFG (CRC1039, A03 to IT; CRC1080 C02 to IT). The funders had no role in the collection, analysis and interpretation of data, writing of the manuscript or the decision to submit the article for publication. |
HeBIS-PPN: | 49098200X |
Institutes: | Medizin |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Sammlungen: | Universitätspublikationen |
Open-Access-Publikationsfonds: | Medizin |
Licence (German): | Creative Commons - Namensnennung 4.0 |