Antioxydant capacity (IC50 concentrations) of phenolics and flavonoids metabolites extracted from
Abstract
With the demand for bioproducts that can provide benefits for biotechnology sectors like pharmaceuticals, nutraceuticals, and cosmeceuticals, the exploration of microalgal products has turned toward extremophiles. This chapter is intended to provide an insight to most important molecules from halotolerant species, the cyanobacteria Phormidium versicolor NCC-466 and Dunaliella sp. CTM20028 isolated from Sfax Solar Saltern (Sfax) and Chott El-Djerid (Tozeur), Tunisia. These microalgae have been cultured in standard medium with a salinity of 80 PSU. The in vitro antioxidant activities demonstrated that extremolyte from Dunaliella and Phormidium as, phycocaynin, lipids, and polyphenol compound presents an important antioxidant potential.
Keywords
- microalgae
- halophile
- biomolecule
- antioxidant properties
1. Introduction
The primary producers of oxygen in aquatic environments are algae, especially planktonic microalgae. They play an important role in carbon dioxide (CO2) recycling through photosynthesis [1]. Microalgae have been divided into ten groups, which refer to the color of the cell including: Cyanobacteria, blue-green algae; Chlorophyta, green algae; Rhodophyta, red algae; Glaucophyta; Euglenophyta; Haptophyta; Cryptophyta; photosynthetic Stramenopiles; Dinophyta; and Chlorarachniophyta [2]. Cyanobacteria are much closer to bacteria in terms of structure and their cells lack both nucleus and chloroplasts. Cyanobacteria are also known as a source of pigments, chlorophyll (a), phycocyanin, phycoerythrin, xanthophyll, and ß-carotene. Microalgae are widely distributed in nature and adapted to different environments from fresh to hypersaline water ecosystems. Salt lakes in arid regions (sabkhas) and solar salterns are an examples of high salty environments inhabited by extremely halophilic microorganisms that include halophilic Archaea (halobacteria), halophilic cyanobacteria, and green algae [3, 4, 5]. These microorganisms must have specific adaptive strategies for surviving in high salinity conditions to prevent the loss of cellular water under high osmolarity in hypersaline conditions [6]. Halophiles generally develop two basic mechanisms: (i) halobacteria and microalgae accumulate KCl (potassium chloride) in their cells to maintain high intracellular salt concentrations, osmotically at least equivalent to the external concentrations (the “salt-in” strategy); (ii) other halophiles produce or accumulate low molecular weight compounds (osmolyte or compatible solute) that have osmotic potential.
Microalgae provide many biotechnology applications in various industrial sectors such as food, cosmetics, pharmaceuticals, energy and environmental industries. Hyperhalophilic microalgae and their bioproducts, has gained a great deal of attention in the last decade. They are well known for their production of high value products such as β-carotene, lipids, and omega 3 fatty acids.
There are high demands for novel lead molecules for new classes of pharmaceutical and research biochemicals, and in combination, these drivers have led to an increased interest in microalgae and cyanobacteria as sources of both bioactive natural products.
Cyanobacteria species contain potential products for medicinal [7] and energy applications [8]. Some of this group has secondary metabolites that can potentially be used as therapeutic agents, such as antivirals, immunomodulators, inhibitors, cytostastics and antioxidants [9]. Several natural compounds such as vitamin C, tocopherol, and numerous plant extracts have been commercialized as natural antioxidants to fight against oxidative stress associated with various chronic diseases including atherosclerosis, diabetes mellitus, neurodegenerative disorders, and certain types of cancer [10]. Antioxidants are a crucial defense against free radical-induced damage [11].
Microalgae are abundant in nature and can be used as a renewable source of natural antioxidants [12]. Free radicals including reactive oxygen species (ROS), such as superoxide (O2•−), hydroxyle (OH•) and Hydrogen Peroxide (H2O2), and reactive nitrogen species (RNS) are generated during normal cellular metabolism. These free radicals are highly reactive species and play a dual role in humans as both beneficial and toxic compounds depending on their concentration. At low or moderate concentration, these reactive species exert beneficial effects on cellular redox signaling and immune function. At high concentration, however, these radical species produce oxidative stress, a harmful process that can lead to cell death through oxidation of protein, lipid, and DNA [11, 13].
A number of microalgae have been used in the commercial production of pigments with antioxidant properties, for example: astaxanthin from
2. Methods of cultivation and antioxidant assays
2.1 Isolation and principal production of the culture of new highly halophilic microalgae strains
Although most species of green algae (Chlorophyceae) are moderately halophilic, a few of them, including
After acclimatation and purification,
Cyanobacteria
2.2 Extraction of metabolite and in vitro antioxidant evaluation
Total lipids were extracted at the end of the exponential phase of growth of
2.2.1 In vitro free radical scavenging and antioxidant assays
The antioxidant potential of the lipid extract (LE) of
The free radical scavenging capacity of phenolic and flavonoids compounds extracted from
3. Lipid antioxidant properties of Dunaliella sp. from Chott El-Djerid
Lipid compounds such as wax, fat, fat-soluble vitamins, oil, triacylglycerols, phospholipids, co-enzymes (ubiquinone), pigments (carotenoids), and more, could be found in plants or animals. Lipids are formed from long-chain hydrocarbons and sometimes contain other functional groups of oxygen, phosphorus, nitrogen, and sulfur. They are insoluble in water, but soluble in organic solvents such as chloroform, hexane, and ether. As invascular plants, microalgae produce both polar and neutral lipids. There is a wide range of bio-based lipid products that can be harvested from microalgal biomass. Microalgae lipids offer great potential in terms of biotechnology applications (e.g. food, food supplements, energy, cosmetics, and pharmaceuticals). In functional food, the use of microalgal lipids has already been established as an industry. The type and quality of the lipid products depend on microalgae species, culture conditions, and recovery methods.
The present study is the first comprehensive
The low IC50 indicates the higher free radical-scavenging ability of
4. Phycocyanin pigments from Phormidium versicolor NCC466 from Sfax solar saltern
Phycocyanin (C-PC) isa hetero-oligomer consisting of a grouping of subunits that are organized into complexes called « phycobilisomes » [28]. C-PC possess a number of unique properties that make it useful colorant, including a higher molecular absorbance, fluorescence quantum yields, stable oligomers, and high photosatbility [29]. Phycocyanin has primarily been used as natural dye; however, it is increasingly being used as nutraceuticals or in ither biotechnological applications [29]. However, to the best of our knowledge, the antioxidant capacity of
Several studies showed that phycocyanin isolated from cyanobacteria species exhibited strong antioxidant properties and can be protected cells against oxidative stress [31, 32]. Moreover, in vitro studies suggest that phycocyanin of
The results here in suggested that administration of C-PC in reaction mixture significantly inhibited lipid peroxidation. The present finding revealed that C-PC had a strong effect and had antagonized action against ferrous sulfate induced lipid peroxidation
5. Antioxidant properties of polyphenolic compounds from P. versicolor NCC466
Polyphenols represent a group of chemical compounds emerging from a common intermediate, phenylalanine, or a close forerunner, shikimic acid [34]. Polyphenols are able to protect cells from oxidative stress by various mechanisms; they can chelate transition metal ions, can inhibit lipid peroxidation by trapping the lipid alkoxyl radical, or can directly scavenge molecular species of active oxygen [34]. Flavonoids are a class of phenolic metabolites that have strong chelating and antioxidant properties [34]. Their tendency to inhibit free radical-mediated events is controlled by their chemical structure. This structure–activity relationship has been well established
Antioxidant test | ||
---|---|---|
DPPH (mg. l−1) | 0.031 ± 0.08 | 0.077 ± 0.06 (BHT) |
ABTS (mg. l−1) | 0.015 ± 0.01 | 0.098 ± 0.02 (TROLOX) |
NO (mg. l−1) | 0.007 ± 0.03 | 0.094 ± 0.01 (Vit C) |
6. Conclusion
News hyerhalophilic microlagae strains,
Acknowledgments
This study was supported by the Ministry of Higher Education and Scientific Research of Tunisia. We thank Dr. Mohammad Ali from Institute for Scientific Research (Kuwait) for correcting the English language.
References
- 1.
Chisti Y. Microalgae as sustainable cell factories. Environmental Engineering and Management Journal. 2006;5:261-274. - 2.
Graham LE, Graham J, Wilcox LW. Algae. Wilbur B. editor. 2nd ed. San Francisco: Pearson Education; 2009. 100p. - 3.
Grant WD, Gemmel RT, McGenity TJ. Halophiles. In: Horikoshi K, Grant, WD, editors. Extremophiles: Microbial Life in Extreme Environments. Wiley-Liss; 1998. p. 93-132. - 4.
Oren A. A hundred years of Dunaliella research1905-2005. Aquatic Biosystems. 2005 ;1:1-14. DOI: 10.1186/1746-1448-1-2 - 5.
Ayadi H, Elloumi J, Guermazi W, Bouain A, hammami M, Giraudoux P, Aleya L. Fatty acids composition in relation to the microorganisms in the Sfax solar saltern, Tunisia. Acta protozoologica. 2008; 47:189-203 - 6.
Oren A. Bioenergetic aspect of halophilism. Microbiology and Molecular Biology Reviews. 1999;63:334-348.DOI: 10.1128/MMBR.63.2.334-348.1999. - 7.
Rastogi RP, Sinha RP. Biotechnological and industrial significance of cyanobacterial secondary metabolites. Biotechnology Advances. 2009;27:521-539. DOI: 10.1016/j.biotechadv.2009.04.009 - 8.
Angermayr SA, Hellingwerf KJ, Lindblad P, de Mattos MJT. Energy biotechnology with cyanobacteria. Current Opinion in Biotechnology. 2009;20:257-263. DOI: 10.1016/j.copbio.2009.05.011 - 9.
Smith JL, Boyer GL, Zimba PV. A review of cyanobacterial odorous and bioactive metabolites: Impacts and management alternatives in aquaculture. Aquaculture. 2008;280:5-20. DOI: 10.1016/j.aquaculture.2008.05.007. - 10.
Vadlapudi V. Antioxidant activities of marine algae: a review. In: Cappasso A, editor. Medicinal plants as antioxidant agents: understanding their mechanism of action and therapeutic efficacy. Research Signpost: Kerala; 2012. p. 189-203. - 11.
Sen S, Chakraborty R. The role of antioxidants in human health. In: Hepel M, Andreescu S, editors. Oxidative stress: diagnostics, prevention, and therapy. American Chemical Society: Washington, D.C; 2011.p 1-37. - 12.
Spolaore P, Joannis-Cassan C, Duran E, Isambert A. Commercial applications of microalgae. Journal of Bioscience and Bioengineering. 2006;101:87-96. DOI: 10.1263/jbb.101.87 - 13.
Pham-Huy LA, He H, Pham-Huy C. Free radicals, antioxidants in disease and health. International Journal of Biomedical Science. 2008;4:89-95. - 14.
Olmos-Soto J, Paniagua-Michel J, Contreras R, Trujillo L. Molecular identification of β-carotene hyperproducing strain of Dunaliella from saline environment using species-specific oligonucleotides. Biotechnology Letters. 2002; 24:365-369.DOI: 10.1023/A:1014516920887 - 15.
Skjanes K, Rebours C, Lindblad P. Potencial for green microalgae to producer hydrogen, pharmaceuticals and other high value products in a combined process. Critical Reviews in Biotechnology. 2013;33:172-215. DOI: 10.3109/07388551.2012.681625 - 16.
Da Silva CM, Gomez ADA, Couri S. Morphological and chemical aspect of Chlorella pyrenoidosa ,Dunaliella tertiolecta ,Isochrysis galbana andTetraselmis gracilis microalgae. Natural Science. 2013;5:783-791.DOI: 10.4236/ns.2013.57094 - 17.
Dahmen-Ben Moussa I, Bellassoued K, Athmouni K, Naifar M, Chtourou H, Ayadi, H., Makni-Ayadi F, Sayadi S, El Feki A, Dhouib, A. Protective effect of Dunaliella sp., lipid extract rich in polyunsaturated fatty acids, on hepatic and renal toxicity induced by nickel in rats. Toxicology Mechanisms and Methods. 2016; 26(3):221-230. DOI: 10.3109/15376516.2016.1158340 - 18.
Roberts CR, Mitchell CW. Spring mounds in southernTunisia. In: Frostick L, Reid, I editors. Desert Sediments: Ancient and Modern. Geol. Soc. London, Special Publications;1987. p. 321-334. - 19.
Swezey CS. The role of climate in the creation and destruction of continental stratigraphic records: an example from the northern margin of the Sahara Desert. In: Climate Controls on Stratigraphy. SEPM Special Publication; 2003. p. 207-225. - 20.
Elloumi J, Carrias JF, Ayadi H, Sime-Ngando T, Boukhris M, Bouain A. Composition and distribution of planktonic ciliates from ponds of different salinity in the solar saltwork of Sfax, Tunisia. Estuarine, Coastal and Shelf Science.2006;67:21-29.DOI: 10.1016/j.ecss.2005.10.011 - 21.
Bligh EG, Dyer WJ. A rapid method of total lipid extraction and purification. Canadian Journal of Biochemistry and Physiology. 1959;37:911-917. - 22.
Silveira ST, Burkert JFdM, Costa JAV, Burkert CAV, Kalil SJ. Optimization of phycocyanin extraction from Spirulina platensis using factorial design. Bioresource Technology. 2007; 98 (8): 1629-1634. DOI: 10.1016/j.biortech.2006.05.050. - 23.
Hajimahmoodi M, Faramarzi MA, Mohammadi N, Soltani N, Oveisi MR, Nafissi-Varcheh N. Evaluation of antioxidant properties and total phenolic contents of some strains of microalgae. Journal of Applied Phycology. 2010; 22:43-50. DOI: 10.1007/s10811-009-9424-y - 24.
Kim Dk, Jeong SW, Lee CY. Antioxidant capacity of phenolic phytochemicals from various cultivars of plums. Food Chemistry. 2003;81:321-326. DOI: 10.1016/S0308-8146(02)00423-5 - 25.
Fakhfakh N, Ktari N, Haddar A, Hamza Mnif I., Dahmen I, Nasri M. Total solubilisation of the chicken feathers by fermentation with a keratinolytic bacterium, Bacillus pumilus A1, and the production of protein hydrolysate with high antioxidative activity. Process Biochemistry. 2011;46:1731-1737.DOI: 10.1016/j.procbio.2011.05.023. - 26.
Halliwell B. Free radicals, reactive oxygen species and human disease: a critical evaluation with special reference to atherosclerosis. British Journal of Experimental Pathology. 1989; 70(6):737-757. - 27.
Fayez AM, Awad AS, El-Naa MM, Kenawy SA, El-Sayed ME. Beneficial effects of thymoquinone and omega-3 on intestinal ischemia/reperfusion induced renal dysfunction in rats. Bulletin of Faculty of Pharmacy, Cairo University. 2014;52:171-177. - 28.
Wiedenmann J. Marine proteins. In: Oceans and Human Health. Risks and Remedies from the Sea. Walsh PJ, Smith SL, Fleming LE, Solo-Gabriele HM, Gerwick WH, editors. Academic Press: St. Louis, MO; 2008. p. 469-495. - 29.
Becker W. Microalgae in human and animal nutrition. In: Richmond A, editor. Handbook of Microalgal Culture: Biotechnology and Applied Phycology: Blackwell Publishing Ltd, Oxford; 2004. p.312-351. - 30.
Bermejo P, Piñero E, Villar ÁM. Iron-chelating ability and antioxidant properties of phycocyanin isolated from a protean extract of Spirulina platensis . Food Chemistry. 2008;110:436-445. DOI: 10.1016/j.foodchem.2008.02.021 - 31.
Ou Y, Zheng S, Lin L, Jiang Q , Yang X. Protective effect of C-phycocyanin against carbon tetrachloride-induced hepatocyte damage in vitro and in vivo. Chemico-Biological Interactions. 2010;185 (2):94-100. DOI: 10.1016/j.cbi.2010.03.013. - 32.
Niu YJ, Zhou W, Guo J, Nie ZW, Shin KT, Kim NH, Lv WF, Cui XS. C-Phycocyanin protects against mitochondrial dysfunction and oxidative stress in parthenogenetic porcine embryos. Scientific Reports. 2017;7(1):16992. DOI: 10.1038/s41598-017-17287-0. - 33.
Thangam R, Suresh V, Princy WA, Rajkumar M, SenthilKumar N, Gunasekaran P, Rengasamy R, Anbazhagan C, Kaveri K, Kannan S. C-Phycocyanin from Oscillatoria tenuis exhibited an antioxidant and in vitro antiproliferative activity through induction of apoptosis and G0/G1 cell cycle arrest. Food Chemistry. 2013;140(1-2):262-272.DOI: 10.1016/j.foodchem.2013.02.060 - 34.
Rodrigo R, Libuy M. Modulation of Plant Endogenous Antioxidant Systems by Polyphenols. In: Watson RR, editor. Polyphenols in Plants Isolation, Purification and Extract Preparation. ISBN: 978-0-12-397934-6 - 35.
Heim KE, Tagliaferro A, Bobiya D. Flavonoid antioxidants: chemistry, metabolism and structure–activity relationships. Journal of Nutritional Biochemistry. 2002;13:572-584. DOI: 10.1016/s0955-2863(02)00208-5 - 36.
Amić D, Davidović-Amić D, Beslo D, Rastija V, Lucić B, Trinajstic N. SAR and QSAR of the antioxidant activity of flavonoids. Curr Med Chem. 2007;14:827-845. DOI: 10.2174/092986707780090954. - 37.
Belghith T, Athmouni K, Bellassoued K, El Feki A, Ayadi H. Physiological and biochemical response of Dunaliella salina to cadmium pollution. Journal of Applied Phycology. 2015;28(2):991-999. DOI: 10.1007/s10811-015-0630-5.