Effect of Burdock Root and the Fermented Product on Alloxan-Induced Mouse Hyperglycemia
<p><strong>Backgrounds:</strong> We reported that feeding 5% <em>Asperagillus awamori-</em>fermented burdock root diet was effective in preventing mouse hyperglycemia caused by alloxan.</p> <p><strong>Methods:</strong> Diets containing 5% burdock roots were prepared from raw and <em>Asperagillus awamori-</em>fermented burdock root powders. Acatalasemic mice<strong>,</strong> having a quite low catalase activity in blood, and normal mice were fed these diets for 14 weeks, separately. Then, alloxan (200 mg/ kg of body weight) or PBS was intraperitoneally administrated to each mouse. After 5 day from the administration, blood glucose assay and glucose tolerance test were carried out, and then insulin, C-peptide and lipid peroxide in plasma were examined.</p> <p><strong>Results:</strong> Incidences of hyperglycemia in normal mice fed control, raw and fermented burdock root diets were 25, 20 and 11 %, respectively, and these in acatalasemic mice<strong> </strong>were 73, 80 and 27%. Insulin and C-peptide in plasma of mice fed raw burdock root diet or control diet were low compared to mice fed the fermented diet.</p> <p><strong>Conclusions:</strong> Intake of raw burdock root does not suppress the alloxan-induced hyperglycemia but the fermented burdock root does. It is suggested that <em>Asperagillus awamori</em> plays an important role for the prevention.</p>