Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 61, Issue 46, Pages 11033-11040Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf402838a
Keywords
elderflowers; elderflower extracts; type 2 diabetes; glucose uptake; fat accumulation; obesity; naringenin; kaempferol; phenolic compounds
Funding
- Danish Council for Strategic Research [09-063086]
- Graduate School of Agriculture, Food and Environment (SAFE), Aarhus University
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Obesity and insulin resistance in skeletal muscles are major features of type 2 diabetes. In the present study, we examined the potential of Sambucus nigra flower (elderflowers) extracts to stimulate glucose uptake (GU) in primary porcine myotubes and reduce fat accumulation (FAc) in Caenorhabditis elegans. Bioassay guided chromatographic fractionations of extracts and fractions resulted in the identification of naringenin and 5-O- caffeoylquinic acid exhibiting a significant increase in GU. In addition, phenolic compounds related to those found in elderflowers were also tested, and among these, kaempferol, ferulic acid, p-coumaric acid, and caffeic acid increased GU significantly. FAc was significantly reduced in C. elegans, when treated with elderflower extracts, their fractions and the metabolites naringenin, quercetin-3-O-rutinoside, quercetin-3-O-glucoside, quercetin-3-O-5 ''-acetylglycoside, kaempferol-3-O-rutinoside, isorhamnetin-3-O-rutinoside, and isorhamnetin-3-O-glucoside and the related phenolic compounds kaempferol and ferulic acid. The study indicates that elderflower extracts contain bioactive compounds capable of modulating glucose and lipid metabolism, suitable for nutraceutical and pharmaceutical applications.
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