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Toxins 2015, 7(9), 3671-3687; doi:10.3390/toxins7093671

Scorpion Toxin, BmP01, Induces Pain by Targeting TRPV1 Channel

1,2,†
,
3,†
,
1,2
,
1,2
,
1,2,* , 3,* and 1,4,*
1
Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
2
Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3
Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650223, China
4
Joint Laboratory of Natural Peptide, University of Science and Technology of China and Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Rong Chen
Received: 6 August 2015 / Revised: 1 September 2015 / Accepted: 7 September 2015 / Published: 14 September 2015
(This article belongs to the Special Issue Animal Toxins and Biological Ion Channels)
View Full-Text   |   Download PDF [1819 KB, uploaded 14 September 2015]   |  

Abstract

The intense pain induced by scorpion sting is a frequent clinical manifestation. To date, there is no established protocol with significant efficacy to alleviate the pain induced by scorpion envenomation. One of the important reasons is that, little information on pain-inducing compound from scorpion venoms is available. Here, a pain-inducing peptide (BmP01) has been identified and characterized from the venoms of scorpion (Mesobuthus martensii). In an animal model, intraplantar injection of BmP01 in mouse hind paw showed significant acute pain in wild type (WT) mice but not in TRPV1 knock-out (TRPV1 KO) mice during 30 min recording. BmP01 evoked currents in WT dorsal root ganglion (DRG) neurons but had no effect on DRG neurons of TRPV1 KO mice. Furthermore, OPEN ACCESS Toxins 2015, 7 3672 BmP01 evoked currents on TRPV1-expressed HEK293T cells, but not on HEK293T cells without TRPV1. These results suggest that (1) BmP01 is one of the pain-inducing agents in scorpion venoms; and (2) BmP01 induces pain by acting on TRPV1. To our knowledge, this is the first report about a scorpion toxin that produces pain by targeting TRPV1. Identification of a pain-inducing compound may facilitate treating pain induced by scorpion envenomation. View Full-Text
Keywords: scorpion Mesobuthus martensii; peptide toxin; BmP01; Kv channels; TRPV1; pain scorpion Mesobuthus martensii; peptide toxin; BmP01; Kv channels; TRPV1; pain
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hakim, M.A.; Jiang, W.; Luo, L.; Li, B.; Yang, S.; Song, Y.; Lai, R. Scorpion Toxin, BmP01, Induces Pain by Targeting TRPV1 Channel. Toxins 2015, 7, 3671-3687.

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