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. 2010 Nov;24(18):1771-82.
doi: 10.1080/14786411003594058.

Hypoglycaemic effects of tea extracts and ent-kaurenoic acid from Smallanthus sonchifolius

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Hypoglycaemic effects of tea extracts and ent-kaurenoic acid from Smallanthus sonchifolius

Dennis D Raga et al. Nat Prod Res. 2010 Nov.

Abstract

Hypoglycaemic activity was observed in normoglycaemic mice orally administered with the aqueous Smallanthus sonchifolius leaf tea extract, alloxan-induced diabetic mice orally administered with ent-kaurenoic acid (1), and normoglycaemic mice intraperitoneally administered with 1 from S. sonchifolius leaves. A single dose administration of 50 mg kg(-1) BW yacon leaf tea extract demonstrated immediate but relatively short hypoglycaemic activity, with significant effects observed during 1-2 h. Similarly, administration with 100 mg kg(-1) BW yacon leaf tea extract obtained by heavy stirring in hot water demonstrated a more potent activity compared to the positive control at 1.5-2.0 h. Oral administration of 1 did not affect the blood glucose level of the alloxan-induced diabetic mice, but a single intraperitonial injection of 10 mg kg(-1) BW in normoglycaemic mice had consistent percent blood glucose reduction persisting from 1 to 2 h observation periods.

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