VITAMIN C (NATURAL ROSE HIPS)
Contents of anthocyanins and ellagitannins in selected foods consumed in Finland
1: J Agric Food Chem. 2007 Feb 21;55(4):1612-9. Epub 2007 Jan 30.
Contents of anthocyanins and ellagitannins in selected foods consumed in Finland.
Food and Health Research Centre, Department of Clinical Nutrition, University of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland. Jani.Koponen@uku.fi
Numerous in vitro and in vivo studies have suggested that dietary anthocyanins and ellagitannins or ellagic acid might have beneficial health effects. Epidemiological evidence on the disease-preventing potential of these polyphenols is lacking, due to the absence of reliable data on their contents in foods. In this study was analyzed the content of anthocyanins and ellagitannins (as ellagic acid equivalents after acid hydrolysis) in foods consumed in Finland, including berries, fruits, vegetables, and processed products, using high-performance liquid chromatographic (HPLC) methods. Anthocyanins were detected in 41 of 54 selected food items. The total anthocyanin content varied in berries from 1 to 611 mg/100 g, in fruits from 2 to 66 mg/100 g, and in vegetables from 3 to 75 mg/100 g of fresh weight as the weight of the aglycone. Ellagitannins were screened in 33 food items, but were detected only in 5 species of berries, that is, in cloudberry, raspberry, rose hip, strawberry, and sea buckthorn, the content ranging from 1 to 330 mg/100 g. The results underscore the superiority of berries, especially dark blue or red berries, as excellent sources of anthocyanins and certain berries of the Rosaceae family as the major source of ellagitannins in the Finnish diet.
PMID: 17261015 [PubMed - in process]
Determination of ellagic acid in pseudofruits of some species of roses
: Acta Pol Pharm. 2006 Jul-Aug;63(4):289-92.
Determination of ellagic acid in pseudofruits of some species of roses.
Department of Pharmaceutical Botany, Medical University of Lublin, Chodzki 1 Str., 20-093 Lublin, Poland.
Ellagic acid (EA) is known as a naturally occurring dietary antimutagen and anticarcinogen with strong antioxidant and anti-inflammatory activities. An SPE RP HPLC method was optimized and applied for identification and determination of ellagic acid in hips of fourteen species of roses, wildly growing in Poland. A large amount of total EA, ranged from 487.2 to 1065.2 microg/g of dry material was found. The results suggest that studied materials are good sources of dietary ellagic acid and could be used as a natural antioxidant and functional food.
PMID: 17203866 [PubMed - indexed for MEDLINE]
Characterisation of proanthocyanidin aglycones and glycosides from rose hips by high-performance liquid chromatography-mass spectrometry, and their rapid quantification together with vitamin C
1: J Chromatogr A. 2005 Jun 10;1077(2):170-80.
Characterisation of proanthocyanidin aglycones and glycosides from rose hips by high-performance liquid chromatography-mass spectrometry, and their rapid quantification together with vitamin C.
Laboratory of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, FI-20014 Turku, Vatselankatu 2, Finland. j-p.salminen@utu.fi
Fifteen individual proanthocyanidin aglycones and 19 glycosides, together with a complex mixture of chromatographically non-separated tetra- to octameric proanthocyanidin glycosides were detected--the non-separated glycosides being novel natural products--and characterised from dog rose hips using high-performance liquid chromatography-electrospray ionisation mass spectrometry (HPLC-ESI-MS). Along with these phenolics, a 50% aqueous ethanol extract of rose hips was found to contain high levels of Vitamin C. A simple and rapid HPLC method assisted by diode array detection for the estimation of the total concentration of proanthocyanidin aglycones and glycosides, as well as Vitamin C, in rose hip extracts was developed.
PMID: 16001553 [PubMed - indexed for MEDLINE]
An antiinflammatory galactolipid from rose hip (Rosa canina) that inhibits chemotaxis of human peripheral blood neutrophils in vitro
1: J Nat Prod. 2003 Jul;66(7):994-5
An antiinflammatory galactolipid from rose hip (Rosa canina) that inhibits chemotaxis of human peripheral blood neutrophils in vitro.
Department of Food Science, Danish Institute of Agricultural Sciences, Research Centre Aarslev, Kirstinebjergvej 10, DK-5792 Aarslev, Denmark.
The galactolipid (2S)-1,2-di-O-[(9Z,12Z,15Z)-octadeca-9,12,15-trienoyl]-3-O-beta-d-galactopyranosyl glycerol (1) isolated from dried and milled fruits of Rosa canina by bioassay-guided fractionation is an antiinflammatory agent with inhibitory effects on chemotaxis of human peripheral blood neutrophils in vitro. The inhibition of cell migration is not related to toxicity. The presence of 1 in rose hips may explain the clinically observed antiinflammatory properties of rose hip herbal remedies.
PMID: 12880322 [PubMed - indexed for MEDLINE]
