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...

TARANTULAS (ARANEAE: THERAPHOSIDAE) REPORTED FROM LORETO DEPARTMENT, PERU

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TARANTULAS (ARANEAE: THERAPHOSIDAE) REPORTED FROM LORETO DEPARTMENT, PERU

ABSTRACT

Tarantulas play a fundamental role as regulators of small animal populations, and are essential in studies of biodiversity, biogeography, animal behavior, and species trade. Despite their importance, there is a significant lack of information on tarantulas in the eastern Peruvian Amazon. To address this knowledge gap, we have compiled an exhaustive list of tarantula species present in the department of Loreto, using bibliographic data from publications such as scientific articles, books, theses, and conference abstracts. We reported a total of 42 tarantula species, corresponding to five subfamilies: Theraphosinae (with 30 species), Aviculariinae (with 6 species Psalmopoeinae (with 4 species), Schismatothelinae (with 1 species) and Ischnocolinae (with 1 specie), none of which are threatened in any conservation category. Of the eight provinces of the department of Loreto, Maynas reported the
highest richness (with 21 species), followed by Putumayo (with 10 species), both sectors were the most studied in Loreto. Meanwhile, the Daten del Marañon province with at least 2 species. This information will be substantial for the development of effective conservation and management strategies for this
important group of terrestrial invertebrates.

Ramos Rodriguez, Maria & Panduro Vasquez, Richard & Zárate Gómez, Ricardo & ANGULO-CAINAMARI, Adan & MEYER, Christoph & ALVAN, José. (2024). TARÁNTULAS (ARANEAE: THERAPHOSIDAE) REPORTADAS DEL DEPARTAMENTO LORETO, PERÚ. Folia Amazónica. 33. e33761. 10.24841/fa.v33i1.761.