Hypoglycaemic and antidiabetic effects in mice of Aloe arborescens Miller var. natalensis Berger

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Abstract
Two different components were separated from Aloe arborescens var. natalensis Berger (Kidachi aloe in Japanese), which exhibit hypoglycaemic activity in spontaneously diabetic mice and normal mice. One component was separated from the succulent layer of the Aloe leaf (leaf pulp). This component, when administered to mice intraperitoneally or orally, decreased the blood glucose level, and maintained the lower level for about 24 h. On the other hand, administration of the superficial layer of the Aloe leaf (leaf skin) to streptozotocin (pancreatic islets beta‐cells toxin) –‐ induced diabetic mice, significantly depressed hyperglycaemia and examination of the tissue section under the light microscope revealed less denaturation and necrosis of islets beta‐cells. These results indicate that Kidachi aloe relieves the diabetic condition by direct hypoglyceration (blood glucose lowering activity) and activates beta‐cells.