Journal
NATURE NEUROSCIENCE
Volume 10, Issue 8, Pages 943-945Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nn1940
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Psalmotoxin 1, a peptide extracted from the South American tarantula Psalmopoeus cambridgei, has very potent analgesic properties against thermal, mechanical, chemical, inflammatory and neuropathic pain in rodents. It exerts its action by blocking acid-sensing ion channel 1a, and this blockade results in an activation of the endogenous enkephalin pathway. The analgesic properties of the peptide are suppressed by antagonists of the mu and delta-opioid receptors and are lost in Penk1(-/-) mice.
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