AaTs-1, a Tetrapeptide from Scorpion Venom Mitigates Demyelination and Neuroinflammation in a Cuprizone-Induced Model of Multiple Sclerosis

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  AaTs-1, a Tetrapeptide from Scorpion Venom Mitigates Demyelination and Neuroinflammation in a Cuprizone-Induced Model of Multiple Sclerosis Abstract Purpose This study focuses on the evaluation of the therapeutic potential of Tetrascorpin-1 (AaTs-1), a tetrapeptide isolated from Androctonus australis hector venom, proposed as a putative formyl peptide receptor 2 (FPR2) antagonist, in a cuprizone-induced murine model of Multiple sclerosis (MS), a chronic autoimmune and inflammatory disease of the central nervous system. Methods Acute demyelination was induced in mice by administering cuprizone (0.2% w/w in the diet) for six weeks. During the sixth week of cuprizone intake, demyelinated mice received intranasal administration of AaTs-1 at a dose of 50–100 µg/kg for five consecutive days, with 24-hour intervals between treatments. Results Behavioral assessments, immunological assays, and histological analyses revealed that AaTs-1 improved body weight, reduced behavioral impairments...

Redescription of Nhandu chromatus Schmidt, 2004 stat. rest. and revalidation of Nhandu sylviae Sherwood, Gabriel & Brescovit, 2023 stat. rest. (Araneae: Theraphosidae)

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Redescription of Nhandu chromatus Schmidt, 2004 stat. rest. and revalidation of Nhandu sylviae Sherwood, Gabriel & Brescovit, 2023 stat. rest. (Araneae: Theraphosidae)

Abstract

Nhandu chromatus Schmidt, 2004 stat. rest. is redescribed based on the holotype male and new non-type female material, with its generic position discussed. Nhandu sylviae Sherwood, Gabriel & Brescovit, 2023 stat. rest. is restored, reversing its synonymy with Vitalius sorocabae (Mello-Leitão, 1923).

Acknowledgment: I would like to extend my sincere thanks to Danni Sherwood for providing the complete manuscript.

Sherwood, Danniella & Peñaherrera-R, Pedro & Brescovit, Antonio & Lucas, Sylvia. (2026). Redescription of Nhandu chromatus Schmidt, 2004 stat. rest. and revalidation of Nhandu sylviae Sherwood, Gabriel & Brescovit, 2023 stat. rest. (Araneae: Theraphosidae). Arachnology. 20. 519-526.