RESUMO
Bidens gardneri Baker, popularly known as "picão-vermelho", has been used, traditionally, as a medicinal plant for the treatment of Diabetes mellitus. This study aimed to evaluate antidiabetic effect of leaves from B. gardneri aqueous extract (BGAE). We also evaluated in vitro anti-glycation potential. Chemical composition was analyzed based on a colorimetrics and HPLC methods. The oral glucose tolerance test (OGTT), was performed in rats with different doses (30, 100 and 300 mg/kg). Alloxan-induced diabetic and hypercaloric diet-fed rats were treated with 300 mg/kg of BGAE, orally, for 10 days and then 10 weeks, respectively. The activity of intestinal disaccharidases (maltase, sucrase and lactase) and quantification of muscle and liver glycogen content were also evaluated. On chemical analysis, the extract showed high phenolics content and the chromatogram showed 4-O-caffeoylquinic acid as the major component. The extract presented inhibition in the formation of advanced glycation end products (AGEs) and disaccharidases activity. In OGTT the dose of 300 mg/kg significantly decreased the blood glucose. In diabetic animals, BGAE significantly decreased blood glucose levels, preventing weight loss. In addition, in hypercaloric diet-fed rats, the extract prevented hyperglycemia. Our results suggest that, aqueous extract of B. gardneri has a potential for therapeutic intervention of diabetes.