Data from this work suggest that the anti-hyperglycemic activity of stem-bark extract of V. macrocarpa can occur through stimulation of insulin signaling pathways in peripheral tissues from diabetic rats, mainly in liver and adipose tissue, probably promoting increase in the glucose uptake and liver glycogen synthesis. The concomitant decreasing in hepatic PEPCK levels could be associated to inhibition of gluconeogenesis, which can also contribute to glycemia reduction.
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