Douleurs neuropathiques - page 9 - Publications Scientifiques

Dernière publication 17/06/2015

Reduction of Neuropathic and Inflammatory Pain through Inhibition of the Tetrahy

Human genetic studies have revealed an association between GTP cyclohydrolase 1 polymorphisms, which decrease tetrahydrobiopterin (BH4) levels, and...

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    [title] => Reduction of Neuropathic and Inflammatory Pain through Inhibition of the Tetrahy
    [paragraph] => Reduction of Neuropathic and Inflammatory Pain through Inhibition of the Tetrahydrobiopterin Pathway
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Authors
Latremoliere A, Latini A, Andrews N, Cronin SJ et al.

 Lab
Kirby Neurobiology Center, Boston Children's Hospital and Department of Neurobiology, Harvard Medical School, Boston, USA.
Journal
Neuron.
Abstract
Human genetic studies have revealed an association between GTP cyclohydrolase 1 polymorphisms, which decrease tetrahydrobiopterin (BH4) levels, and reduced pain in patients. We now show that excessive BH4 is produced in mice by both axotomized sensory neurons and macrophages infiltrating damaged nerves and inflamed tissue. Constitutive BH4 overproduction in sensory neurons increases pain sensitivity, whereas blocking BH4 production only in these cells reduces nerve injury-induced hypersensitivity without affecting nociceptive pain. To minimize risk of side effects, we targeted sepiapterin reductase (SPR), whose blockade allows minimal BH4 production through the BH4 salvage pathways. Using a structure-based design, we developed a potent SPR inhibitor and show that it reduces pain hypersensitivity effectively with a concomitant decrease in BH4 levels in target tissues, acting both on sensory neurons and macrophages, with no development of tolerance or adverse effects. Finally, we demonstrate that sepiapterin accumulation is a sensitive biomarker for SPR inhibition in vivo.
BIOSEB Instruments Used
Dynamic Weight Bearing 2.0 (BIO-DWB-DUAL)
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Un système permettant l'analyse de la posture des animaux par la répartition du poids sur chacune des 4 pattes. Le DWB est un test unique dans l'étude de nombreux modèles de douleurs, principalement non évoquée , neuropathique ou encore inflammatoire ainsi que pour les études sur l'osthéoarthrite et divers affections du SNC. 

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