Novel Scorpion Toxin ω-Buthitoxin-Hf1a Selectively Inhibits Calcium Influx via CaV3.3 and CaV3.2 and Alleviates Allodynia in a Mouse Model of Acute Postsurgical Pain - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Molecular Sciences Année : 2024

Novel Scorpion Toxin ω-Buthitoxin-Hf1a Selectively Inhibits Calcium Influx via CaV3.3 and CaV3.2 and Alleviates Allodynia in a Mouse Model of Acute Postsurgical Pain

Dan Wang
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Volker Herzig
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  • PersonId : 1378785
K Johan Rosengren
  • Fonction : Auteur
  • PersonId : 1378786
Colton D Payne
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  • PersonId : 1378787
Jiajie Zhuang
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Emmanuel Bourinet
Lotten Ragnarsson
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Paul F Alewood
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  • PersonId : 1378789
Richard J Lewis
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Résumé

Venom peptides have evolved to target a wide range of membrane proteins through diverse mechanisms of action and structures, providing promising therapeutic leads for diseases, including pain, epilepsy, and cancer, as well as unique probes of ion channel structure-function. In this work, a high-throughput FLIPR window current screening assay on T-type CaV3.2 guided the isolation of a novel peptide named ω-Buthitoxin-Hf1a from scorpion Hottentotta franzwerneri crude venom. At only 10 amino acid residues with one disulfide bond, it is not only the smallest venom peptide known to target T-type CaVs but also the smallest structured scorpion venom peptide yet discovered. Synthetic Hf1a peptides were prepared with C-terminal amidation (Hf1a-NH2) or a free C-terminus (Hf1a-OH). Electrophysiological characterization revealed Hf1a-NH2 to be a concentration-dependent partial inhibitor of CaV3.2 (IC50 = 1.18 μM) and CaV3.3 (IC50 = 0.49 μM) depolarized currents but was ineffective at CaV3.1. Hf1a-OH did not show activity against any of the three T-type subtypes. Additionally, neither form showed activity against N-type CaV2.2 or L-type calcium channels. The three-dimensional structure of Hf1a-NH2 was determined using NMR spectroscopy and used in docking studies to predict its binding site at CaV3.2 and CaV3.3. As both CaV3.2 and CaV3.3 have been implicated in peripheral pain signaling, the analgesic potential of Hf1a-NH2 was explored in vivo in a mouse model of incision-induced acute post-surgical pain. Consistent with this role, Hf1a-NH2 produced antiallodynia in both mechanical and thermal pain.
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Wang et al (2024) ijms-25-04745-novel scorpion toxin w-buthitoxin-Hf1a selectively inhibits calcium influx via Cav3.3 and Cav3.2 and alleviates allodynia in a mouse model of accute postchirurgical pain.pdf (917.14 Ko) Télécharger le fichier
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Dates et versions

hal-04561037 , version 1 (26-04-2024)

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Dan Wang, Volker Herzig, Zoltan Dekan, K Johan Rosengren, Colton D Payne, et al.. Novel Scorpion Toxin ω-Buthitoxin-Hf1a Selectively Inhibits Calcium Influx via CaV3.3 and CaV3.2 and Alleviates Allodynia in a Mouse Model of Acute Postsurgical Pain. International Journal of Molecular Sciences, 2024, 2024 (25), pp.4745. ⟨10.3390/ijms25094745⟩. ⟨hal-04561037⟩
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