title: Oil palm vegetation liquor: a new source of phenolic bioactives.
abstract: Waste from agricultural products represents a disposal liability, which needs to be addressed. Palm oil is the most widely traded edible oil globally, and its production generates 85 million tons of aqueous by-products annually. This aqueous stream is rich in phenolic antioxidants, which were investigated for their composition and potential in vitro biological activity. We have identified three isomers of caffeoylshikimic acid as major components of oil palm phenolics (OPP). The 2,2-diphenyl-1-picrylhydrazyl assay confirmed potent free radical scavenging activity. To test for possible cardioprotective effects of OPP, we carried out in vitro LDL oxidation studies as well as ex vivo aortic ring and mesenteric vascular bed relaxation measurements. We found that OPP inhibited the Cu-mediated oxidation of human LDL. OPP also promoted vascular relaxation in both isolated aortic rings and perfused mesenteric vascular beds pre-contracted with noradrenaline. To rule out developmental toxicity, we performed teratological studies on rats up to the third generation and did not find any congenital anomalies. Thus, these initial studies suggest that OPP is safe and may have a protective role against free radical damage, LDL oxidation and its attendant negative effects, as well as vascular constriction in mitigating atherosclerosis. Oil palm vegetation liquor thus represents a new source of phenolic bioactives.
authors: Malaysian Palm Oil Board, Persiaran Institusi, Bandar Baru Bangi, Kajang Selangor, Malaysia. raviga@mpob.gov.my
authors: Ravigadevi
authors: R
authors: Sambanthamurthi
authors: YewAi
authors: Y
authors: Tan
authors: Kalyana
authors: K
authors: Sundram
authors: Mahinda
authors: M
authors: Abeywardena
authors: T G
authors: TG
authors: Sambandan
authors: ChoKyun
authors: C
authors: Rha
authors: Anthony J
authors: AJ
authors: Sinskey
authors: Krishnan
authors: K
authors: Subramaniam
authors: Soon-Sen
authors: SS
authors: Leow
authors: Kenneth C
authors: KC
authors: Hayes
authors: Mohd Basri
authors: MB
authors: Wahid
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000032:analysis / Q000494:pharmacology; D001011:Aorta / Q000187:drug effects / Q000502:physiology; D001713:Biphenyl Compounds / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D066298:In Vitro Techniques; D008077:Lipoproteins, LDL / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008643:Mesentery / Q000187:drug effects / Q000502:physiology; D010084:Oxidation-Reduction; D000073878:Palm Oil; D010636:Phenols / Q000032:analysis* / Q000633:toxicity; D010851:Picrates / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D051381:Rats
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D008077:Lipoproteins, LDL; D010636:Phenols; D010851:Picrates; D010938:Plant Oils; D000073878:Palm Oil; C004931:1,1-diphenyl-2-picrylhydrazyl