The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons
Restoration of neuronal connectivity after lesion of the central nervous system, such as spinal cord injury, is one of the biggest challenges in modern medicine. In particular, the accumulation of axon growth inhibitory factors at the site of injury constitutes a major obstacle to structural and thu...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-07-01
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| Series: | Frontiers in Cellular Neuroscience |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fncel.2019.00332/full |
| _version_ | 1818265975419568128 |
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| author | Lara Bieler Lara Bieler Michael Vogl Michael Vogl Michael Kirchinger Michael Kirchinger Corinna Urmann Corinna Urmann Herbert Riepl Herbert Riepl Christine Bandtlow Lars Klimaschewski Ludwig Aigner Ludwig Aigner Ludwig Aigner Sebastien Couillard-Despres Sebastien Couillard-Despres Sebastien Couillard-Despres |
| author_facet | Lara Bieler Lara Bieler Michael Vogl Michael Vogl Michael Kirchinger Michael Kirchinger Corinna Urmann Corinna Urmann Herbert Riepl Herbert Riepl Christine Bandtlow Lars Klimaschewski Ludwig Aigner Ludwig Aigner Ludwig Aigner Sebastien Couillard-Despres Sebastien Couillard-Despres Sebastien Couillard-Despres |
| author_sort | Lara Bieler |
| collection | DOAJ |
| description | Restoration of neuronal connectivity after lesion of the central nervous system, such as spinal cord injury, is one of the biggest challenges in modern medicine. In particular, the accumulation of axon growth inhibitory factors at the site of injury constitutes a major obstacle to structural and thus functional repair. We previously investigated a group of prenylflavonoids derived from hops for their capacity to promote neuroregeneration. We identified a molecule called ENDF1 that was very potent to enhance regrowth and branching of neurites from dorsal root ganglion neurons in culture on growth promoting substrates. In the present study, we investigated ENDF1’s capacity to promote regeneration of rat dorsal root ganglion neurons in vitro in the presence of three main components of the extracellular matrix acting as axon growth inhibitors: Semaphorin 3A, Ephrin A4 and mixed chondroitin sulfate proteoglycans. We report that ENDF1 application significantly promoted the percentages of sensory neurons able to regrow their neurites regardless of the presence of those inhibitors, and this to an extent similar to the one obtained after NGF treatment. Moreover, ENDF1 strongly enhanced the total neurite length and the complexity of neurites extending from neurons challenged with axon growth inhibitors. Although the impact of NGF and ENDF1 on the regeneration of neurons was similar, the activity of ENDF1 was not mediated by signaling through the TrkA receptor, indicating that each molecule act through different signaling pathways. In addition, ENDF1 did not decrease the phosphorylation of cofilin, a downstream effector of the regeneration-associated RhoA/ROCK signaling pathway. Hence, ENDF1 is a potent pro-neuroregenerative factors that could help in identifying new efficient targets for regenerative therapies of the nervous system. |
| first_indexed | 2024-12-12T19:59:21Z |
| format | Article |
| id | doaj.art-98c851670698497582ce2e69fdbba9c9 |
| institution | Directory Open Access Journal |
| issn | 1662-5102 |
| language | English |
| last_indexed | 2024-12-12T19:59:21Z |
| publishDate | 2019-07-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Cellular Neuroscience |
| spelling | doaj.art-98c851670698497582ce2e69fdbba9c92022-12-22T00:13:48ZengFrontiers Media S.A.Frontiers in Cellular Neuroscience1662-51022019-07-011310.3389/fncel.2019.00332453236The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG NeuronsLara Bieler0Lara Bieler1Michael Vogl2Michael Vogl3Michael Kirchinger4Michael Kirchinger5Corinna Urmann6Corinna Urmann7Herbert Riepl8Herbert Riepl9Christine Bandtlow10Lars Klimaschewski11Ludwig Aigner12Ludwig Aigner13Ludwig Aigner14Sebastien Couillard-Despres15Sebastien Couillard-Despres16Sebastien Couillard-Despres17Institute of Experimental Neuroregeneration, Paracelsus Medical University, Salzburg, AustriaSpinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Salzburg, AustriaInstitute of Experimental Neuroregeneration, Paracelsus Medical University, Salzburg, AustriaSpinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Salzburg, AustriaOrganic-Analytical Chemistry, Weihenstephan-Triesdorf University of Applied Sciences, Straubing, GermanyTUM Campus Straubing, Straubing, GermanyOrganic-Analytical Chemistry, Weihenstephan-Triesdorf University of Applied Sciences, Straubing, GermanyTUM Campus Straubing, Straubing, GermanyOrganic-Analytical Chemistry, Weihenstephan-Triesdorf University of Applied Sciences, Straubing, GermanyTUM Campus Straubing, Straubing, GermanyDivision of Neurobiochemistry, Innsbruck Medical University, Innsbruck, AustriaDepartment of Anatomy, Histology and Embryology, Division of Neuroanatomy, Medical University of Innsbruck, Innsbruck, AustriaSpinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Salzburg, AustriaInstitute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, AustriaAustrian Cluster for Tissue Regeneration, Vienna, AustriaInstitute of Experimental Neuroregeneration, Paracelsus Medical University, Salzburg, AustriaSpinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Salzburg, AustriaAustrian Cluster for Tissue Regeneration, Vienna, AustriaRestoration of neuronal connectivity after lesion of the central nervous system, such as spinal cord injury, is one of the biggest challenges in modern medicine. In particular, the accumulation of axon growth inhibitory factors at the site of injury constitutes a major obstacle to structural and thus functional repair. We previously investigated a group of prenylflavonoids derived from hops for their capacity to promote neuroregeneration. We identified a molecule called ENDF1 that was very potent to enhance regrowth and branching of neurites from dorsal root ganglion neurons in culture on growth promoting substrates. In the present study, we investigated ENDF1’s capacity to promote regeneration of rat dorsal root ganglion neurons in vitro in the presence of three main components of the extracellular matrix acting as axon growth inhibitors: Semaphorin 3A, Ephrin A4 and mixed chondroitin sulfate proteoglycans. We report that ENDF1 application significantly promoted the percentages of sensory neurons able to regrow their neurites regardless of the presence of those inhibitors, and this to an extent similar to the one obtained after NGF treatment. Moreover, ENDF1 strongly enhanced the total neurite length and the complexity of neurites extending from neurons challenged with axon growth inhibitors. Although the impact of NGF and ENDF1 on the regeneration of neurons was similar, the activity of ENDF1 was not mediated by signaling through the TrkA receptor, indicating that each molecule act through different signaling pathways. In addition, ENDF1 did not decrease the phosphorylation of cofilin, a downstream effector of the regeneration-associated RhoA/ROCK signaling pathway. Hence, ENDF1 is a potent pro-neuroregenerative factors that could help in identifying new efficient targets for regenerative therapies of the nervous system.https://www.frontiersin.org/article/10.3389/fncel.2019.00332/fullflavonoidsdorsal root ganglionsDRG neuronsaxonal outgrowthsemaphorinephrin |
| spellingShingle | Lara Bieler Lara Bieler Michael Vogl Michael Vogl Michael Kirchinger Michael Kirchinger Corinna Urmann Corinna Urmann Herbert Riepl Herbert Riepl Christine Bandtlow Lars Klimaschewski Ludwig Aigner Ludwig Aigner Ludwig Aigner Sebastien Couillard-Despres Sebastien Couillard-Despres Sebastien Couillard-Despres The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons Frontiers in Cellular Neuroscience flavonoids dorsal root ganglions DRG neurons axonal outgrowth semaphorin ephrin |
| title | The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons |
| title_full | The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons |
| title_fullStr | The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons |
| title_full_unstemmed | The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons |
| title_short | The Prenylflavonoid ENDF1 Overrules Central Nervous System Growth Inhibitors and Facilitates Regeneration of DRG Neurons |
| title_sort | prenylflavonoid endf1 overrules central nervous system growth inhibitors and facilitates regeneration of drg neurons |
| topic | flavonoids dorsal root ganglions DRG neurons axonal outgrowth semaphorin ephrin |
| url | https://www.frontiersin.org/article/10.3389/fncel.2019.00332/full |
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