Lanthionine ketimine ethyl ester partially rescues neurodevelopmental defects inunc-33(DPYSL2/CRMP2) mutants
| Autor: | Erica Benda, Sean O'Brien, Kenneth Hensley, Elizabeth St. John, Tyler Hardin, Taylor Baxter, Caleb Hubbard, Andrea Holgado |
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| Rok vydání: | 2013 |
| Předmět: |
Nervous system
Yellow fluorescent protein Neurite Biology Green fluorescent protein Cell biology Cellular and Molecular Neuroscience chemistry.chemical_compound medicine.anatomical_structure Biochemistry chemistry Ventral nerve cord medicine biology.protein Cholinergic Lanthionine Ketimine Collapsin response mediator protein family |
| Zdroj: | Journal of Neuroscience Research. 91:1183-1190 |
| ISSN: | 0360-4012 |
| DOI: | 10.1002/jnr.23239 |
| Popis: | Lanthionine ketimine (LK) is a natural sulfur amino acid metabolite with potent neurotrophic activity. Proteomics indicate that LK interacts with collapsin response mediator protein-2 (CRMP2/DPYSL2/UNC-33), a brain-enriched protein that was shown to regulate cytoskeletal remodeling, neuronal morphology, and synaptic function. To elucidate further the molecular interplay and biological action of LK and UNC-33, we began examining the nervous system of Caenorhabditis elegans nematodes in which both LK concentrations and UNC-33 protein were manipulated. To this end, a cell-permeable LK-ester (LKE) was administered to developing C. elegans engineered to express yellow fluorescent protein (YFP) in cholinergic neurons (strain RM3128) or green fluorescent protein (GFP) in GABAergic neurons (strain CZ1200), and neural morphology was assessed. Fluorescent imaging analyses show that LKE exposure to wild-type animals induced neural commissure outgrowth, crossing over, and bundling in both neurites from GABAergic and cholinergic motor neurons. Additionally, when unc-33(e204) hypomorph mutant nematodes (D389N substitution mutants) were exposed to LKE, both the neuroanatomical defects of incomplete dorsoventral neural commissures and the ventral nerve cord gaps were partially rescued. In contrast, LKE did not rescue ventral nerve cord gaps found in unc-33(mn407) null mutant. Together these data suggest possible functions for LK as a regulator of neuritic elongation, corroborate roles for UNC-33/CRMP2 in the mechanism of LKE activity, and suggest the potential of LKE as a therapeutic molecule for neurological diseases involving CRMP2 dysfunction. |
| Databáze: | OpenAIRE |
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