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Fucan is a term used to denominate a family of sulfated polysaccharides rich in L-fucose. The brown alga Spatoglossum schröederi, Dictyotaceae, synthesizes three heterofucans named A, B, and C. Fucan A is a non-anticoagulant heterofucan which possesses potent antithrombotic (in vivo) and antiproliferative (in vitro) activities. However, its toxicity in vivo has not been determined. The present study examined the acute and subchronic toxicity of the fucan A in Wistar rats after subcutaneous administration. After that, the animals were killed and examined. The results showed in the acute study that fucan A did not cause general adverse effects and mortality in the concentrations 0, 20, 100, 1000, and 2000 µg/g body weight per rat for seven days. Regarding the subchronic study, the data showed that the fucan A did not cause any change in hematological and biochemistry parameters, as well as in the morphology, and in the size of the rat's organs analyzed at a concentration of 20 µg/g body weight per rat during a 62-day period. In conclusion, this study indicates this heterofucan is a compound with potential pharmacological value that has no toxicity in vivo

revista brasileira de farmacognosia

Evaluation of acute and subchronic toxicity of a non-anticoagulant, but antithrombotic algal heterofucan from the Spatoglossum schröederi in Wistar rats