The underlying mechanism of scorpion venom peptide BmK AS in reducing epilepsy seizures: mediated through dual modulation of Nav1.6 and the inflammasome pathway

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  The underlying mechanism of scorpion venom peptide BmK AS in reducing epilepsy seizures: mediated through dual modulation of Nav1.6 and the inflammasome pathway Abstract Introduction:  Voltage-gated sodium channel (VGSC) dysregulation, particularly of the Nav1.6 subtype, is a core mechanism underlying epileptogenesis and its associated neuropsychiatric comorbidities. The scorpion venom peptide BmK AS has demonstrated anticonvulsant potential, but its efficacy in chronic epilepsy and the precise mechanisms of action remain undefined. Methods:  Here, we show that BmK AS exerts robust anti-epileptic and neuroprotective effects through converging mechanisms. In a kainic acid-induced mouse model, BmK AS treatment reduced mortality and seizure parameters. Electrophysiological studies assessed BmK AS modulation of VGSC subtypes. The functional relevance of Nav1.6 targeting was confirmed by the loss of BmK AS’s anti-seizure efficacy upon its pharmacological blockade in a PTZ-in...

Transcriptomic assessment of the Black Judaicus scorpion (Hottentotta judaicus) toxin arsenal and its potential bioeconomic value

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Transcriptomic assessment of the Black Judaicus scorpion (Hottentotta judaicus) toxin arsenal and its potential bioeconomic value

Abstract

Scorpion venoms are likewise a medical burden as well as a source of novel bioresources. Despite their important dual role, the venoms of most scorpion species remain under- or unstudied. Among these is the venom of the Black Judaicus scorpion, Hottentotta judaicus (Simon, 1872), a common yet neglected species native to the Middle East. Here, we employ venom gland transcriptomics to investigate its toxin-encoding precursor profile to gain insight into its toxin repertoire. The venom was found to be composed primarily of various short scorpion toxins, long scorpion toxins from the 3 C-C as well as the 4 C-C type, and enzymatic components. Minor components include, defensins and putative antimicrobial peptides. Several identified toxins show similarity to known neurotoxins from lethal buthids or to toxins with translational value in biomedicine, agriculture, and industrial production, thus rendering H. judaicus both, a potential health concern and source of novel bioresources. Our work provides an extended perspective on the venom profile of this species and represents a basis for future follow-up studies.


Tim Lueddecke, Josephine Dresler, Sabine Hurka, Yachen Wang, Tamara Pohler, Yuri Simone, Jonas Kraemer, Andreas Vilcinskas, Volker Herzig 

bioRxiv 2025.07.09.664027; doi: https://doi.org/10.1101/2025.07.09.664027