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International Journal of Medicinal Mushrooms
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ISSN Imprimir: 1521-9437
ISSN En Línea: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2017024374
pages 797-807

Antioxidative and Inhibitory Effects of the Fruiting Body of Black Lingzhi Mushroom, Amauroderma rugosum (Agaricomycetes), on LDL Oxidation and HMG-CoA Reductase Activity

Chan Kam Seng
Mushroom Research Centre & Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
Noorlidah Abdullah
Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
Norhaniza Aminudin
Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia

SINOPSIS

Amauroderma rugosum fruiting bodies possess excellent cardiovascular benefits, including antioxidative, antihyperlipidemic, antihypertensive, antiinflammatory, anti-platelet aggregation, and antithrombotic effects. In this article, we describe our investigations of the in vitro antioxidant activity and in vitro antiatherosclerotic potential through inhibitory effects on low-density lipoprotein (LDL), LDL peroxidation, and 3-hydroxy3-methylglutaryl-coenzyme A (HMG-CoA) reductase catalytic activity using various fruiting body extracts partitioned with an organic solvent. Among 5 extracts/fractions tested, the semipolar ethyl acetate (EA) fraction demonstrated good antioxidant capacity based on total phenolic content, 2,2-diphenyl-1-picrylhydrazyl free radical scavenging, ferrous ion-chelating ability, cupric ion-reducing antioxidant capacity, and lipid peroxidation assays. The EA fraction also showed the strongest inhibitory effect on Cu2+-induced LDL oxidation via thiobarbituric acid reactive substances formation and HMG-CoA reductase activity. Chemical analysis conjointly identified 10 phenolic compounds (4 benzoic acid derivatives, 3 flavonoids, 1 cinnamic acid, 1 hexahydroxydiphenic acid dilactone, and 1 xanthone derivative), some of which play pivotal roles in arresting the physiopathogenesis of atherosclerosis, thereby attenuating the risk of cardiovascular events occurring.


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