Methylglyoxal modification of Nav1.8 facilitates nociceptive neuron firing and causes hyperalgesia in diabetic neuropathy
This study establishes a mechanism for metabolic hyperalgesia based on the glycolytic metabolite methylglyoxal. We found that concentrations of plasma methylglyoxal above 600 nM discriminate between diabetes-affected individuals with pain and those without pain. Methylglyoxal depolarizes sensory neu...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
06 July 2012
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| In: |
Nature medicine
Year: 2012, Volume: 18, Issue: 6, Pages: 926-933 |
| ISSN: | 1546-170X |
| DOI: | 10.1038/nm.2750 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1038/nm.2750 Verlag, Volltext: https://www.nature.com/articles/nm.2750 
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| Author Notes: | Angelika Bierhaus, Thomas Fleming, Stoyan Stoyanov, Andreas Leffler, Alexandru Babes, Cristian Neacsu, Susanne K. Sauer, Mirjam Eberhardt, Martina Schnölzer, Felix Lasitschka, Winfried L. Neuhuber, Tatjana I. Kichko, Ilze Konrade, Ralf Elvert, Walter Mier, Valdis Pirags, Ivan K. Lukic, Michael Morcos, Thomas Dehmer, Naila Rabbani, Paul J. Thornalley, Diane Edelstein, Carla Nau, Josephine Forbes, Per M. Humpert, Markus Schwaninger, Dan Ziegler, David M. Stern, Mark E. Cooper, Uwe Haberkorn, Michael Brownlee, Peter W. Reeh & Peter P. Nawroth |
| Summary: | This study establishes a mechanism for metabolic hyperalgesia based on the glycolytic metabolite methylglyoxal. We found that concentrations of plasma methylglyoxal above 600 nM discriminate between diabetes-affected individuals with pain and those without pain. Methylglyoxal depolarizes sensory neurons and induces post-translational modifications of the voltage-gated sodium channel Nav1.8, which are associated with increased electrical excitability and facilitated firing of nociceptive neurons, whereas it promotes the slow inactivation of Nav1.7. In mice, treatment with methylglyoxal reduces nerve conduction velocity, facilitates neurosecretion of calcitonin gene-related peptide, increases cyclooxygenase-2 (COX-2) expression and evokes thermal and mechanical hyperalgesia. This hyperalgesia is reflected by increased blood flow in brain regions that are involved in pain processing. We also found similar changes in streptozotocin-induced and genetic mouse models of diabetes but not in Nav1.8 knockout (Scn10−/−) mice. Several strategies that include a methylglyoxal scavenger are effective in reducing methylglyoxal- and diabetes-induced hyperalgesia. This previously undescribed concept of metabolically driven hyperalgesia provides a new basis for the design of therapeutic interventions for painful diabetic neuropathy. |
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| Item Description: | Gesehen am 17.07.2018 Im Titel ist das v in Nav1.8 tiefgestellt |
| Physical Description: | Online Resource |
| ISSN: | 1546-170X |
| DOI: | 10.1038/nm.2750 |