<b>Inhibition of coagulation proteases and thrombosis and sub-chronic toxicological study of a sulfated polysaccharidic fraction from the red alga <i>Gelidiella acerosa</i>

  • Ismael Nilo Lino de Queiroz Universidade Federal do Rio de Janeiro
  • José Ariévilo Gurgel Rodrigues Universidade Federal do Rio de Janeiro
  • Ana Luíza Gomes Quinderé Universidade Federal do Ceará
  • Márjory Lima Holanda Universidade Federal do Ceará
  • Maria Gonçalves Pereira Universidade Estadual do Ceará
  • Norma Maria Barros Benevides Universidade Federal do Ceará
Keywords: Rhodophyta, polysulfated, Gelidiella acerosa, antithrombotic agent, bioactivities, in vivo toxicity

Abstract

Metabolites isolated from Gelidiella species (Rhodophyta) have been few studied. We evaluated a sulfated polysaccharidic fraction from G. acerosa collected from two Brazilian beaches on the northwestern coast of Brazil (Flecheiras-F and Pedra Rachada-PR) on coagulation proteases and thrombosis. Their toxicity in vivo was also assessed. Enzymatic extractions yielded 1.40%, and similar chromatographic profiles (DEAE-cellulose) were obtained, with fractions (Ga-I→V) containing differences among the relative proportions of sulfate (5-42%), and revealing charge density patterns by electrophoresis. Ga-IV-PR had a discrete effect (3.01 IU mg-1) on normal human coagulation compared with heparin
(193 IU mg-1) and was tested on coagulation proteases (thrombin and factor Xa) in the presence of antithrombin and in a model of venous thrombosis in rats using thromboplastin as the thrombogenic stimulus. The systems were inhibited; but at higher doses (>1.0 mg kg-1), this fraction reverted the antithrombotic effect. Regarding the toxicological study, consecutive Ga-IV (9 mg kg-1) for 14 days did not cause mortality in mice, but some biochemical and hematological parameters were discretely altered. Histopathological analysis revealed that increased liver and spleen sizes had no toxicological significance. Therefore, G. acerosa does not biochemically change its matrix polysaccharide composition and proved to be safe antithrombotic agent.

 


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Author Biography

Ismael Nilo Lino de Queiroz, Universidade Federal do Rio de Janeiro
Graduado em Engenharia de Pesca pela Universidade Federal do Ceará (2004), mestrado em Recursos Pesqueiros e Engenharia de Pesca pela Universidade Federal do Ceará (2006) e doutorado em Biotecnologia pela Rede Nordeste de Biotecnologia - RENORBIO/UFC (2011). Tem experiência na área de Recursos Pesqueiros e Engenharia de Pesca e de Biotecnologia em Recursos Naturais, com ênfase em Taxonomia de Algas Marinhas, Fisiologia Comparada (taxonomia de grupos, filogenia e biogeografia) e Bioprospecçâo de Produtos Naturais Bioativos de Organismos Aquáticos. Atua nas seguintes áreas: Ficologia, Química de macromoléculas (polissacarídeos sulfatados) e suas propriedades químicas e implicações terapêuticas sobre coagulação, trombose, dor, inflamação e de avaliação toxicológica (aguda, subcrônica e crônica). Foi professor horista (prestador de serviços) do Instituto de Desenvolvimento, Educação e Cultura do Ceará (IDECC-UVA) e do Instituto Dom José de Educação e Cultura (IDJ-UVA). Atualmente, realiza Pós-Doutorado na Universidade Federal do Rio de Janeiro (CAPES-PNPD).
Published
2014-10-03
How to Cite
Queiroz, I. N. L. de, Rodrigues, J. A. G., Quinderé, A. L. G., Holanda, M. L., Pereira, M. G., & Benevides, N. M. B. (2014). <b>Inhibition of coagulation proteases and thrombosis and sub-chronic toxicological study of a sulfated polysaccharidic fraction from the red alga <i>Gelidiella acerosa</i&gt;. Acta Scientiarum. Biological Sciences, 36(4), 393-401. https://doi.org/10.4025/actascibiolsci.v36i4.23704
Section
Biotechnology

 

0.6
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0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus