Treatment of inflammatory and neuropathic pain by uncoupling Src from the NMDA receptor complex
摘要：
Chronic pain hypersensitivity depends on N-methyl-D-aspartate receptors (NMDARs). However, clinical use of NMDAR blockers is limited by side effects resulting from suppression of the physiological functions of these receptors. Here we report a means to suppress pain hypersensitivity without blocking NMDARs, but rather by inhibiting the binding of a key enhancer of NMDAR function, the protein tyrosine kinase Src. We show that a peptide consisting of amino acids 40-49 of Src fused to the protein transduction domain of the HIV Tat protein (Src40-49Tat) prevented pain behaviors induced by intraplantar formalin and reversed pain hypersensitivity produced by intraplantar injection of complete Freund's adjuvant or by peripheral nerve injury. Src40-49Tat had no effect on basal sensory thresholds, acute nociceptive responses or cardiovascular, respiratory, locomotor or cognitive functions. Thus, through targeting of Src-mediated enhancement of NMDARs, inflammatory and neuropathic pain are suppressed without the deleterious consequences of directly blocking NMDARs, an approach that may be of broad relevance to managing chronic pain.
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关键词：
Animals Behavior, Animal Formaldehyde Gene Products, tat Inflammation 动物 行为, 动物 甲醛 基因产物, TAT 炎症
DOI：
10.1038/nm.1883
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Springer
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