Hypolipidaemic and anti-atherosclerotic effects of lupin proteins in a rabbit model

The British journal of nutrition (Impact Factor: 3.34). 09/2008; 100(04):707 - 710. DOI: 10.1017/S000711450894215X

ABSTRACT The biological activities of a protein isolate from lupin (Lupinus albus) were studied in a rabbit model of atherosclerosis. Focal plaque development was induced at both common carotid arteries by perivascular injury. After surgery, animals were fed three different diets for 90 d, all with 1 % cholesterol, 15 % SFA and 20 % protein; the protein source was casein (CAS), lupin proteins (LUP) or 50 % CAS+50 % LUP (CAS+LUP). Lower cholesterolaemia was detected in the LUP v. the CAS group at 60 and 90 d of treatment ( − 40·3 and − 33·5 %, respectively; P < 0·05). Cryosection analyses of the carotids indicated a significant reduction in focal lesion progression in the LUP v. the CAS group ( − 37·4 %; P < 0·05). In summary, in a rabbit model of atherosclerosis, a protein isolate from L. albus reduced cholesterolaemia and exerted a remarkable protective activity against atherosclerosis progression.

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    ABSTRACT: Lupin proteins have repeatedly been shown to exhibit lipid lowering properties and reduce aortic calcification in atherosclerosis models. Despite many efforts on its identification, the component which is responsible for the observed effects is still under debate. Phytic acid which is generally associated with lupin protein isolates has currently been described as bioactive plant compound. The objective of the study was to determine the role of associated phytic acid for the described lupin protein effects. A two-factorial study with ApoE knockout mice was conducted in which mice received lupin protein isolate or casein with or without phytase. Phytic acid was added to the casein diets to a final concentration identical to the lupin protein diets. Here we show that the serum concentrations of cholesterol, lathosterol and desmosterol were lower and the faecal bile acid excretion was higher in the groups fed lupin proteins than in the groups fed casein (p < 0.05). Mice that received the lupin protein diet containing phytic acid were characterized by a lower aortic calcification than mice of the other three groups (p < 0.05). In conclusion, our results show that the cholesterol lowering properties of lupin protein isolate were not caused by phytic acid. However, the hypocalcific action of lupin proteins appears to depend on the combination of lupin proteins and phytic acid.
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    ABSTRACT: Rotations in the Nordic and Baltic region are, as elsewhere in Europe, heavily biased towards cereals. Broadleaved crops in general, and grain legumes in particular, offer a range of environmental and agricultural benefits that are inadequately exploited in this region. This article reviews some of the options available to the region. Brassica oilseeds can be used as catch crops, cover crops and biofumigants, as well as for their oil and protein-rich meal. Fibre hemp is a good soil-cleaning crop with excellent bioenergy potential. Grain legumes produce food and animal feed locally while contributing positively to soil health, and are particularly under-exploited regionally, in spite of the availability of suitable germplasm. The prospects for using mainstream alternative crops in regional rotations are therefore very good and this use should lead to improved agricultural sustainability and economic viability.
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    ABSTRACT: The seeds of the plants of the Fabaceae, commonly known as “grain legumes” or “pulses,” are major foodstuffs in most countries. In addition, these seeds may also provide some health benefits, in particular in the area of hypercholesterolemia and hypertension prevention. Whereas the hypocholesterolemic activity of soy protein has been well known for decades and was finally supported by the health claim by the U.S. Food and Drug Administration in 1999, similar information on non-soy legumes is scarce. This paper reviews all such available data from animal models and human trials as well as information on the mechanism of action provided by in vitro studies, mainly on cell cultures or assays on specific enzymes. This body of data indicates that a regular consumption of grain legumes may be useful both for the prevention of hypercholesterolemia and hypertension. More investigations are needed, however, for elucidating the mechanism of action and the actual effective components in legumes.
    Critical Reviews in Plant Sciences 06/2015; 34. DOI:10.1080/07352689.2014.897908 · 5.29 Impact Factor

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