Barietin, a snake venom vascular endothelial growth factor from puff adder Bitis arietans venom, increases the heart rate with minor effect on blood pressure in rats

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  Barietin, a snake venom vascular endothelial growth factor from puff adder Bitis arietans venom, increases the heart rate with minor effect on blood pressure in rats ABSTRACT Snake venom vascular endothelial growth factors (svVEGFs) are homodimeric proteins comprising two equal subunits bound by two intermolecular disulfide bonds. The main biological effects of svVEGFs are local vasodilatation, increasing of vascular permeability, and hypotension. Barietin, a svVEGF purified from the venom of puff adder Bitis arietans , differs from other representatives of this toxin family by its shortened C-terminal amino acid sequence. No data about barietin effects on hemodynamics are available. Studying those in rats we found that barietin at a dose of 1 mg/kg significantly increased heart rate, exerting only a minor influence on blood pressure. In this respect, it differs from other svVEGFs having a significant effect on blood pressure. We aimed to find the barietin active fragment which m...

Three new species of the genus Weintrauboa Hormiga, 2003 (Araneae, Linyphiidae) from China

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Three new species of the genus Weintrauboa Hormiga, 2003 (Araneae, Linyphiidae) from China

Abstract

Three new species of the genus Weintrauboa Hormiga, 2003 are described here as: W. denticulata sp. nov. (Hunan, ♂), W. shenwu sp. nov. (Hubei and Chongqing, ♂♀), and W. wanglangensis sp. nov. (Sichuan, ♂♀). Detailed descriptions, photographs of genital characters, somatic features, and a distribution map are provided.

Gao Z, Irfan M, Wang L-Y (2025) Three new species of the genus Weintrauboa Hormiga, 2003 (Araneae, Linyphiidae) from China. ZooKeys 1236: 185-196. https://doi.org/10.3897/zookeys.1236.146324