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...

First record of Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) for Hidalgo, Mexico whit data about his distribution in North America

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First record of Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) for Hidalgo, Mexico whit data about his distribution in North America


ABSTRACT 

Worldwide, the genus Euryopis has 81 species, its distribution is known to be cosmopolitan, 23 species of the genus are currently known in North America. This work records Euryopis scriptipes for the first time based of the review of a male and female for the state of Hidalgo, Mexico, as well providing data on its current distribution in North America. This new record expands the distribution of E. scriptipes in this biogeographical region.

Sánchez-Vega, U., Vargas , C. F. ., Callejas-Chavero, A. ., Flores-Martínez, A. y Villegas-Guzmán, G. A. . (2023) «Primer registro de Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) para Hidalgo, México con datos sobre su distribución en Norteamérica», Acta Zoológica Lilloana, 67(1), pp. 45–50. doi: 10.30550/j.azl/2023.67.1/2023-01-09.