Multiplexed chemogenetics in astrocytes and motoneurons restore blood-spinal cord barrier in ALS
Blood-spinal cord barrier (BSCB) disruption is thought to contribute to motoneuron (MN) loss in amyotrophic lateral sclerosis (ALS). It is currently unclear whether impairment of the BSCB is the cause or consequence of MN dysfunction and whether its restoration may be directly beneficial. We reveale...
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| Hauptverfasser: | , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
8 September 2020
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| In: |
Life science alliance
Year: 2020, Jahrgang: 3, Heft: 11, Pages: 1-28 |
| ISSN: | 2575-1077 |
| DOI: | 10.26508/lsa.201900571 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.26508/lsa.201900571 Verlag, lizenzpflichtig, Volltext: https://www.life-science-alliance.org/content/3/11/e201900571 
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| Verfasserangaben: | Najwa Ouali Alami, Linyun Tang, Diana Wiesner, Barbara Commisso, David Bayer, Jochen Weishaupt, Luc Dupuis, Phillip Wong, Bernd Baumann, Thomas Wirth, Tobias M Boeckers, Deniz Yilmazer-Hanke, Albert Ludolph, Francesco Roselli |
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| 520 | |a Blood-spinal cord barrier (BSCB) disruption is thought to contribute to motoneuron (MN) loss in amyotrophic lateral sclerosis (ALS). It is currently unclear whether impairment of the BSCB is the cause or consequence of MN dysfunction and whether its restoration may be directly beneficial. We revealed that SOD1G93A, FUSΔNLS, TDP43G298S, and Tbk1+/− ALS mouse models commonly shared alterations in the BSCB, unrelated to motoneuron loss. We exploit PSAM/PSEM chemogenetics in SOD1G93A mice to demonstrate that the BSCB is rescued by increased MN firing, whereas inactivation worsens it. Moreover, we use DREADD chemogenetics, alone or in multiplexed form, to show that activation of Gi signaling in astrocytes restores BSCB integrity, independently of MN firing, with no effect on MN disease markers and dissociating them from BSCB disruption. We show that astrocytic levels of the BSCB stabilizers Wnt7a and Wnt5a are decreased in SOD1G93A mice and strongly enhanced by Gi signaling, although further decreased by MN inactivation. Thus, we demonstrate that BSCB impairment follows MN dysfunction in ALS pathogenesis but can be reversed by Gi-induced expression of astrocytic Wnt5a/7a. | ||
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