Electrophysiological Characterization of the Venom and Toxins from the Scorpion Tityus championi Targeting Voltage-Gated Sodium Channels and Molecular Modeling of Tch3, a Toxin with Therapeutic Potential for Pain Relief

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  Electrophysiological Characterization of the Venom and Toxins from the Scorpion Tityus championi Targeting Voltage-Gated Sodium Channels and Molecular Modeling of Tch3, a Toxin with Therapeutic Potential for Pain Relief Abstract Scorpion neurotoxins are small peptides that target ion channels and offer opportunities for novel therapeutic discovery. This study analyzed the functional effects of the venom and toxins from the Costa Rican endemic scorpion,  Tityus championi . Initially, crude venom was tested on different isoforms of voltage-gated sodium channels. Our findings revealed that the venom contains toxins that affect mammalian Na V 1.6 and Na V 1.7, as well as the cockroach BgNa V 1 channel. Increased currents through Na V 1.6 and BgNa V 1 channels were associated with bigger window currents and inhibition of inactivation. Decreased Na V 1.7 currents were associated with smaller conductance. Crude venom and TCh3 toxin inhibited action potential generation in invertebr...

Updated distribution of Zoropsis spinimana (Dufour, 1820; Araneae: Zoropsidae) in Germany and novel insights into its ecology based on a citizen science survey

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Updated distribution of Zoropsis spinimana (Dufour, 1820; Araneae: Zoropsidae) in Germany and novel insights into its ecology based on a citizen science survey

Abstract

In Germany, Zoropsis spinimana (Dufour, 1820) is an introduced, likely synanthropic spider species. Here, we report the results of a nationwide mapping appeal conducted by the citizen science platform NABU-naturgucker.de, used to assemble live distributional data for the species in Germany. With the help of media interest in this species, we gathered a valuable dataset and a large image gallery of the species. In just five weeks, we received more than 15,000 records, representing a 2.3-fold increase in occupied territory compared to previous knowledge. By analyzing the data in detail, we obtained novel insights into the ecology and eco-geography of Z. spinimana in Germany, including information on prey, coloration, potential predators, altitudinal distribution and temporal appearance, along with two cases of accidental human translocation.

Wirth, A. (2024). Updated distribution of Zoropsis spinimana (Dufour, 1820; Araneae: Zoropsidae) in Germany and novel insights into its ecology based on a citizen science survey. Frontiers in Arachnid Science, 3, 1383339. https://doi.org/10.3389/frchs.2024.1383339