Ceesay A et al. (2019), Extraction and Characterization of Organ Compon...

ECB-ART-47201

Biomed Res Int 2019 Jan 01;2019:2640684. doi: 10.1155/2019/2640684.

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Extraction and Characterization of Organ Components of the Malaysian Sea Cucumber Holothuria leucospilota Yielded Bioactives Exhibiting Diverse Properties.

Ceesay A , Nor Shamsudin M , Aliyu-Paiko M , Ismail IS , Nazarudin MF , Mohamed Alipiah N .

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The aim of the present study was to extract and characterize bioactive components from separate body organs of Holothuria leucospilota. Preliminary qualitative assessment of the crude extracts was positive for phenols, terpenoids, carbohydrates, flavonoids, saponins, glycosides, cardiac glycosides, steroids, phlobatannins, and tannins in all body organs evaluated. Phenolics were the most abundant group of bioactives accounting for approximately 80%. The extraction solvent mixtures that yielded most compounds evaluated were methanol/acetone (3:1, v:v) and methanol/distilled water (3:1, v:v). In other analyses, GC-MS data revealed diverse metabolic and biologically active compounds, where those in high concentrations included 2-Pentanone, 4-hydroxy-4-methyl- among the ketones; phenol- 2,4-bis(1,1-dimethylethyl)-, a phenol group; and 2-Chlorooctane, a hydrocarbon. Among FA and their methyl/ethyl esters, n-hexadecanoic acid, 5,8,11,14-eicosatetraenoic acid ethyl ester (arachidonic acid), and 5,8,11,14,17-eicosapentaenoic acid methyl ester (EPA) were among the most abundant FAMEs accounting for approximately 50% of the subgroups measured. Data from GC-FID analysis revealed methyl laurate (C12:0), methyl myristate (C14:0), methyl palmitate (C16:0), and methyl stearate (18:0) methyl esters as the most abundant saturated FA, whereas cis-9-oleic methyl ester (C18:1) and methyl linoleate (C18:2) were found as the major monounsaturated FA and PUFA FAMEs, respectively, in the body wall of the species. Taken together, the extraction and characterization of different categories of metabolically and biologically active compounds in various organ extracts of H. leucospilota suggest that the species is potentially a rich source of cholesterol-lowering, antioxidant, antimicrobial, and anticancer agents. These substances are known to benefit human health and assist in disease prevention. These findings justify the use of sea cucumbers in traditional folklore medication and the current interest and attention focused on the species to mine for bioactives in new drugs research.

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Species referenced: Echinodermata
Genes referenced: LOC100887844

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	Figure 1. Graphical presentation of estimated concentrations of groups of bioactive components in body wall (BW) extracts of sea cucumber, H. leucospilota sampled from Peninsular Malaysia; GAE: gallic acid equivalent, RE: rutin equivalent, DE: diosgenin equivalent (all in mg/g) from study [19].
	Figure 2. Concentrations (%) of compound subgroups detected via GC-MS and measured in BW extract of sea cucumber, H. leucospilota: FAME: fatty acid methyl esters, TPE: terpenes, ALD: aldehydes, PNL: phenols, CHO: carbohydrates, ALC: alcohols, CBA: carboxylic acids, ST: sterols, FA: fatty acids, AM: amines, HCN: hydrocarbons, KE: ketones.