An IGTT was performed on Day 55. After 12 h of fasting, 0.1 mL of blood was taken from the tail nick that rat tail was only cut once, such as other studies [31 (link)–33 (link)], and serum glucose was measured using an Accu-Check Advantage Blood Glucose Monitor (Roche Diagnostic Corporation, Indianapolis, IN, USA). Immediately after this baseline measurement, a dose of 50% glucose solution (1 g/kg body weight) was injected intraperitoneally as described previously [34 (link)]. The serum glucose level was measured at 0, 30, 60, 90, and 120 minutes after the glucose load.
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