Enrichment of polyphenol contents and antioxidant activities of Irish brown macroalgae using food-friendly techniques based on polarity and molecular size

Tierney, Michelle S.; Smyth, Thomas J.; Dilip, K.; Soler-Vila, Anna; Croft, Anna K.; Brunton, Nigel P.

doi:10.1016/j.foodchem.2013.01.019

Cited by 93 publications

(67 citation statements)

References 39 publications

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“…The very strong FRSA of F. spiralis extracts may be due to its high concentration of phlorotannins, particularly in the acetone:water (7:3) extracts. Our findings are in agreement with those of previous studies on FRSA of extracts/fractions from other algae samples, such as the French and Irish F. spiralis [18,19] and other Fucus species ( F. vesiculosus , F. ceranoides , and F. serratus ) [60,64,66]. It should also be highlighted that a recent study by Paiva et al [16] revealed that high-molecular weight phlorotannins fraction from Azorean F. spiralis hydrolysate show a strong antioxidant activity on free radicals and also show high inhibitory activity of ACE-I (angiotensin-I converting enzyme).…”

Section: Resultssupporting

confidence: 94%

“…[61]. Furthermore, sparse characterization of individual phlorotannin components has been carried out in F. spiralis [15,18,19], although this species is known to produce two types of polymeric phlorotannins of the fucol and fucophlorethol classes endowed with a high antioxidant activity [18]. …”

Section: Resultsmentioning

confidence: 99%

“…Previous studies on its nutritional and/or pharmacological value from our research group have reported that F. spiralis is a good source of valuable biochemical compounds [14] with potential impact on human health [15,16], particularly the bioactive phlorotannins that are the predominant polyphenols in brown algae, being abundant in Fucaceae [17]. F. spiralis from other origins have also been demonstrated to possess some important biological activities, such as high antioxidant properties that are mainly linked to its phlorotannins content [18,19,20]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal Variability of the Biochemical Composition and Antioxidant Properties of Fucus spiralis at Two Azorean Islands

et al. 2018

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This study evaluates, for the first time, the seasonal (winter and summer) and geographical (São Miguel–SMG and Santa Maria–SMA Islands) variability of Fucus spiralis (Fs) biochemical composition (dry weight basis) and antioxidant properties. Protein and carbohydrates presented higher values in Fs-SMGwinter, lipids, total dietary fiber, and energy value in Fs-SMAsummer, and ash and soluble dietary fiber/insoluble dietary fiber ratio in Fs-SMAwinter. The fatty acid (FA) profiles showed a lower SFA in Fs-SMGsummer, whereas MUFA and PUFA presented higher values in Fs-SMGsummer and Fs-SMGwinter, respectively. Excellent dietary ratios of n6/n3 PUFA and hypocholesterolemic/hypercholesterolemic FA were found, with lower values in Fs-SMAwinter and higher in Fs-SMGsummer, respectively. The highest total phenolics was found in Fs-SMAsummer acetone:water extract and total flavonoids showed the higher value in Fs-SMGwinter methanol extract. The best free radical-scavenging activity was observed in the Fs-SMAwinter methanol (EC50 = 0.045 mg/mL) and acetone:water (EC50 = 0.059 mg/mL) extracts. The ferric-reducing antioxidant power showed the best results in Fs-SMAwinter methanol extract (EC50 = 0.016 mg/mL) and Fs-SMAsummer acetone:water extract (EC50 = 0.017 mg/mL). The best ferrous ion-chelating activity was found in Fs-SMGwinter acetone:water extract. Overall, results revealed that F. spiralis nutritional and functional bioactivity values have geographical and seasonal variations and that its regular consumption may add benefits to human health.

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Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal Variability of the Biochemical Composition and Antioxidant Properties of Fucus spiralis at Two Azorean Islands

et al. 2018

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“…P. palmata, have been suggested (Galland-Irmouli et al 2000;Dumay et al 2013) together with methodology for industrial upscaling (Denis et al 2009). Polyphenols are secondary metabolites which are abundant in brown seaweeds such as A. nodosum, Fucus spp., and widely recognized for their antioxidant properties (Wang et al 2009;Tierney et al 2013). Polyphenol-rich extracts from brown algae have inhibitory effects against lipid oxidation in fish (Wang et al 2010) and fish oil (Xiaojun et al 1996).…”

Section: Product Applications-industrial Perspectivesmentioning

confidence: 99%

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

2017

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The use of cultivated seaweeds as a feedstock for multiple industrial applications has gained increasing interest in the Western World over the past decades. Norway has an extensive coastline and a well-established aquaculture sector offering suitable preconditions for developing large-scale cultivation of seaweed biomass both in monoculture and in Integrated Multi-Trophic Aquaculture (IMTA) systems. Recent efforts from research, industry and public authorities have been committed to develop a Norwegian bio-economy based on cultivated seaweed, focusing on cultivation and processing of the biomass. This review reports on the status of seaweed aquaculture in Norway, supported by production data collected since the delivery of the first commercial cultivation permits at sea in 2014. Although novel product developments are currently limited, future industrial perspectives based on cultivated biomass are being discussed. Upscaling from experimental cultivation schemes to commercial production requires a thorough assessment of the risks and benefits associated with seaweed aquaculture, as well as the development of a regulative framework adapted to this industry. Issues associated with upscaling the macroalgal production that needs to be addressed includes (i) genetic interactions between cultivated and wild crops, (ii) impacts of seaweed cultivation on surrounding ecosystems, (iii) epiphytes and diseases, (iv) area utilization and (v) threats from climate change. Addressing these issues and adapting production practices will ensure the environmental and economic sustainability of an emerging industry based on cultivated seaweed biomass in Norway.

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“…They are present in the algae in free form or forming complexes with different components of the cell walls, such as alginic acid [2,4]. Phlorotannins are essential to the physiological integrity of alga and involved in a number of important secondary roles such as chemical defense, protection against oxidative damage that occurs in response to changes in nutrient availability and UV radiation, interactions with other organisms or the abiotic environment, as well as being integral components of cell wall [5,6]. These compounds have attracted considerable research interest for their broad health benefits and potential uses in a range of therapeutics [4,7].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Identification of Phlorotannins from the Brown Alga, Sargassum fusiforme (Harvey) Setchell

et al. 2017

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Phlorotannins are a group of complex polymers of phloroglucinol (1,3,5-trihydroxybenzene), which are unique compounds from marine brown algae. In our present study, a procedure for extraction and enrichment of phlorotannins from S. fusiforme with highly antioxidant potentials was established. After comparison of different extraction methods, the optimal extraction conditions were established as follows. The freeze-dried seaweed powder was extracted with 30% ethanol-water solvent with a solid/liquid ratio of 1:5 at temperature of 25 °C for 30 min. After extraction, the phlorotannins were fractioned by different solvents, among which the ethyl acetate fraction exhibited both the highest total phlorotannin content (88.48 ± 0.30 mg PGE/100 mg extract) and the highest antioxidant activities. The extracts obtained from these locations were further purified and characterized using a modified UHPLC-QQQ-MS method. Compounds with 42 different molecular weights were detected and tentatively identified, among which the fuhalol-type phlorotannins were the dominant compounds, followed by phlorethols and fucophlorethols with diverse degree of polymerization. Eckol-type phlorotannins including some newly discovered carmalol derivatives were detected in Sargassum species for the first time. Our study not only described the complex phlorotannins composition in S. fusiforme, but also highlighted the challenges involved in structural elucidation of these compounds.

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Enrichment of polyphenol contents and antioxidant activities of Irish brown macroalgae using food-friendly techniques based on polarity and molecular size

Cited by 93 publications

References 39 publications

Seasonal Variability of the Biochemical Composition and Antioxidant Properties of Fucus spiralis at Two Azorean Islands

Seasonal Variability of the Biochemical Composition and Antioxidant Properties of Fucus spiralis at Two Azorean Islands

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

Extraction and Identification of Phlorotannins from the Brown Alga, Sargassum fusiforme (Harvey) Setchell

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