Identification of α-glucosidase inhibitors from the leaves of Pluchea indica (L.) Less., a traditional Indonesian herb: promotion of natural product use.

Abstract

A promising approach for treating diabetes mellitus (DM) is to decrease postprandial hyperglycaemia by suppressing carbohydrate digestion using α-glucosidase inhibitors. Pluchea indica leaf extracts possess inhibitory activity against intestinal maltase. Enzyme assay-guided fractionation by chromatography yielded five active caffeoylquinic acid derivatives (1-5). Their structures were elucidated by mass spectrometry and NMR analysis and completed by comparison with reference data. 3,5-Di-O-caffeoylquinic acid (1), 4,5-di-O-caffeoylquinic acid methyl ester (2), 3,4,5-tri-O-caffeoylquinic acid methyl ester (3), 3,4,5-tri-O-caffeoylquinic acid (4) and 1,3,4,5-tetra-O-caffeoylquinic acid (5) were isolated. Comparison of the activities of each isolate suggested that both methyl esterification of quinic acid and the number of caffeate groups in the molecule were important for the inhibitory activity. This study provides basic information for further examination of the suitability of P. indica as a functional food and medicinal supplement for the treatment and prevention of diabetes.

• Authors: Ines Septi Arsiningtyas, Maria D P T Gunawan-Puteri, Eisuke Kato, Jun Kawabata
• Journal: Natural product research (Nat Prod Res) Vol. 28 Issue 17 Pg. 1350-3 ( 2014) ISSN: 1478-6427 [Electronic] England
• PMID: 24697406 (Publication Type: Journal Article)

Chemical References

• Biological Products
• Glycoside Hydrolase Inhibitors
• Hypoglycemic Agents
• caffeoylquinic acid
• Quinic Acid
• Chlorogenic Acid
• alpha-Glucosidases
• 5'-O-caffeoylquinic acid

Topics

• Asteraceae (chemistry)
• Biological Products (chemistry, isolation & purification, pharmacology)
• Chlorogenic Acid (analogs & derivatives)
• Glycoside Hydrolase Inhibitors (chemistry, isolation & purification, pharmacology)
• Hypoglycemic Agents (chemistry, isolation & purification, pharmacology)
• Indonesia
• Plant Leaves (chemistry)
• Quinic Acid (analogs & derivatives, chemistry, isolation & purification, pharmacology)
• alpha-Glucosidases (drug effects)