Jararaca GPIb-binding protein causes thrombocytopenia during Bothrops jararaca envenomation
Inoculation of Bothrops jararaca snake venom (BjV) induces thrombocytopenia in humans and various animal species. Although several BjV toxins acting on hemostasis have been well characterized in vitro, it is not known which one is responsible for inducing thrombocytopenia in vivo. In previous studies, we showed that BjV incubated with metalloproteinase or serine proteinase inhibitors and/or anti-botrocetin antibodies still induced thrombocytopenia in rats and mice. Thus, herein we identified and characterized BjV toxins responsible for inducing thrombocytopenia. Initially, by filtering BjV on ultrafiltration systems, proteins with molecular masses between 30 and 50 kDa were shown to induce thrombocytopenia in mice, but they were not associated with hemorrhagic or coagulating activities. The 50 kDa ultrafiltrate was chromatographed, and two proteins (named fraction D and fraction E) induced thrombocytopenia in mice. However, neither fraction D nor fraction E induced platelet aggregation in platelet-rich plasma or whole blood from humans or mice. By mass spectrometry analysis, fraction E was identified as jararaca glycoprotein Ib (GPIb)-binding protein. Injection of these fractions caused thrombocytopenia in control or Vwf<sup>-/-</sup> mice, showing that the axis platelet GPIb - von Willebrand factor is not involved in their biological action in vivo. New studies are necessary to understand how these proteins act in vivo.
Authors
- María Elisa Peichoto (ORCID: https://orcid.org/0000-0001-7269-3086)
- Solange M.T. Serrano (ORCID: https://orcid.org/0000-0001-8994-1904)
- Ricardo J.S. Torquato (ORCID: https://orcid.org/0000-0003-1960-5950)
- Ana Teresa Azevedo Sachetto (ORCID: https://orcid.org/0000-0002-8234-1209)
- Aparecida S. Tanaka (ORCID: https://orcid.org/0000-0001-9407-805X)
- Débora Andrade-Silva (ORCID: https://orcid.org/0000-0002-4683-1008)
- Cynthia Zaccanini de Albuquerque
- Jaqueline Gomes Rosa
- Vânia Gomes de Moura Mattaraia (ORCID: https://orcid.org/0000-0001-9099-3963)
- Marcelo Larami Santoro (ORCID: https://orcid.org/0000-0001-6364-3757)
- Dilza Trevisan-Silva (ORCID: https://orcid.org/0000-0002-6519-346X)
Institutions
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- Universidade Federal da Integração Latino-Americana (BR)
- Universidade de São Paulo (BR)
- Instituto Butantan (BR)
- Administración Nacional de Laboratorios e Institutos de Salud (AR)
- Faculdade de Medicina do ABC (BR)
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular (BR)
- Instituto Nacional de Medicina Tropical (AR)
- Universidade Federal de São Paulo (BR)
Publication Details
- Journal
- Scientific Reports
- Published
- 2024-12-30
- DOI
- https://doi.org/10.1038/s41598-024-81851-8
- Citations
- 3
- Primary Topic
- Venomous Animal Envenomation and Studies
- Type
- article
- Field-Weighted Citation Impact
- 1.65
Funders
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Governo Brasil
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação Butantan
- Universidade Estadual de Campinas
- Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación