1
|
Park S, Shin Y, Jung S. Structural, rheological properties and antioxidant activities analysis of the exopolysaccharide produced by Rhizobium leguminosarum bv. viciae VF39. Int J Biol Macromol 2024; 257:128811. [PMID: 38101683 DOI: 10.1016/j.ijbiomac.2023.128811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/27/2023] [Accepted: 12/12/2023] [Indexed: 12/17/2023]
Abstract
Microbial exopolysaccharide is an eco-friendly and non-toxic biopolymeric materials widely used in various industrial fields such as pharmaceutical, food and cosmetics based on its structural, rheological and physiochemical properties. A microbial exopolysaccharide (VF39-EPS) was directly isolated from Rhizobium leguminosarum bv. viciae VF39. Structural analysis using FTIR and 2D NMR spectroscopy confirmed the complete chemical structures of VF39-EPS as 3-hydroxybutanoylglycan with octasaccharide repeating units containing two pyruvyl, two acetyl, and one 3-hydroxybutanoyl group. VF39-EPS exhibited thermal stability up to 275 °C and showed characteristic rheological behaviors of structural fluid with weak gel-like properties above 4 % the aqueous solution, suggesting VF39-EPS as a potential effective thickener or hydrogel scaffolder. Flow behavior tests validated broad stability at a wide range of both pHs from 2 to 12 and temperatures from 25 to 75 °C, and even in the presence of various salts. Furthermore, VF39-EPS showed excellent antioxidant effects of 78.5 and 62.4 % (n = 3, p < 0.001) in DPPH scavenging activity and hydroxyl radical scavenging activity, respectively. Therefore, those structural, rheological and antioxidant properties suggest that VF39-EPS could be one of the excellent biomaterial candidates for cosmetic, food and pharmaceutical industries based on its characteristic rheological behaviors in various condition and excellent antioxidant activity.
Collapse
Affiliation(s)
- Sohyun Park
- Department of Bioscience and Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
| | - Younghyun Shin
- Department of Bioscience and Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
| | - Seunho Jung
- Department of Bioscience and Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea; Department of System Biotechnology, Microbial Carbohydrate Resource Bank (MCRB), Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea.
| |
Collapse
|
2
|
Bamigbade G, Ali AH, Subhash A, Tamiello-Rosa C, Al Qudsi FR, Esposito G, Hamed F, Liu SQ, Gan RY, Abu-Jdayil B, Ayyash M. Structural characterization, biofunctionality, and environmental factors impacting rheological properties of exopolysaccharide produced by probiotic Lactococcus lactis C15. Sci Rep 2023; 13:17888. [PMID: 37857676 PMCID: PMC10587178 DOI: 10.1038/s41598-023-44728-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023] Open
Abstract
Exopolysaccharides (EPSs) possess distinctive rheological and physicochemical properties and innovative functionality. This study aimed to investigate the physicochemical, bioactive, and rheological properties of an EPS secreted by Lactococcus lactis subsp. lactis C15. EPS-C15 was found to have an average molecular weight of 8.8 × 105 Da and was identified as a hetero-EPS composed of arabinose, xylose, mannose, and glucose with a molar ratio of 2.0:2.7:1.0:21.3, respectively. The particle size and zeta potential represented 311.2 nm and - 12.44 mV, respectively. FITR exhibited that EPS-C15 possessed a typical polysaccharide structure. NMR displayed that EPS-C15 structure is → 3)α-d-Glcvi (1 → 3)α-d-Xylv (1 → 6)α-d-Glciv(1 → 4)α-d-Glc(1 → 3)β-d-Man(1 → 2)α-d-Glci(1 → . EPS-C15 scavenged DPPH and ABTS free radicals with 50.3% and 46.4% capacities, respectively. Results show that the antiproliferative activities of EPS-C15 revealed inhibitions of 49.7% and 88.1% against MCF-7 and Caco-2 cells, respectively. EPS-C15 has antibacterial properties that inhibited Staphylococcus aureus (29.45%), Salmonella typhimurium (29.83%), Listeria monocytogenes (30.33%), and E. coli O157:H7 (33.57%). The viscosity of EPS-C15 decreased as the shear rate increased. The rheological properties of the EPS-C15 were affected by changes in pH levels and the addition of salts. EPS-C15 is a promising biomaterial that has potential applications in various industries, such as food, pharmaceuticals, and healthcare.
Collapse
Affiliation(s)
- Gafar Bamigbade
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, UAE
| | - Abdelmoneim H Ali
- Department of Food Science, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt
| | - Athira Subhash
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, UAE
| | - Camila Tamiello-Rosa
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, UAE
| | - Farah R Al Qudsi
- Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid, 21121, Jordan
| | - Gennaro Esposito
- Science Division - New York University Abu Dhabi, NYUAD Campus, Saadiyat Island, PO Box 129188, Abu Dhabi, UAE
| | - Fathalla Hamed
- Department of Physics, College of Science, United Arab Emirates University (UAEU), PO Box 1555, Al Ain, UAE
| | - Shao-Quan Liu
- Department of Food Science and Technology, Faculty of Science, National University of Singapore, Science Drive 2, Singapore, 117542, Singapore
| | - Ren-You Gan
- Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research (A*STAR), Singapore, 138669, Singapore
| | - Basim Abu-Jdayil
- Chemical and Petroleum Engineering Department, College of Engineering, United Arab Emirates University (UAEU), PO Box 15551, Al Ain, UAE.
| | - Mutamed Ayyash
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, UAE.
| |
Collapse
|
3
|
Rheological characterization of the exopolysaccharide produced by Alteromonas macleodii Mo 169. Int J Biol Macromol 2023; 227:619-629. [PMID: 36539173 DOI: 10.1016/j.ijbiomac.2022.12.117] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/05/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Rheology modifiers are essential additives in numerous products in a variety of industries. Due to environmental awareness, consumer-oriented industries are interested in novel natural rheological agents that can replace synthetic chemicals. In this study, the chemical composition and rheological properties of a novel exopolysaccharide (EPS) produced by Alteromonas macleodii Mo 169 were investigated. It was mainly composed of uronic acids (50 mol%) and total carbohydrates were 17 % sulfated. The EPS viscosity increased with concentration, and a non-Newtonian shear thinning behavior was found for concentrations above 0.1 wt%. The elastic and viscous moduli indicated a weak gel-like structure above 0.4 wt%. It maintained its shear thinning behavior and viscoelastic properties in the presence of NaCl and CaCl2 for pH range 5-7 and temperatures up to 55 °C. Though the apparent viscosity decreased at pH 3 and 9 and temperatures above 65 °C, the shear thinning behavior was retained. The viscous and viscoelastic properties were recovered after heating (95 °C) and cooling (0 °C), indicating a good thermal stability and recoverability. After high shear force, the solution recovered original rheological properties within few seconds, demonstrating self-healing properties.
Collapse
|
4
|
Cuellar-Bermudez SP, Bleus D, Mees MA, Struyf T, Lama S, Vandamme D, Adriaensens P, Scherrers R, Thielemans W, Van den Ende W, Wattiez R, Muylaert K. Isolation, purification, and metal-induced gelation of released polysaccharides from spent culture medium of Arthrospira. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
|
5
|
Liberti D, Imbimbo P, Giustino E, D’Elia L, Silva M, Barreira L, Monti DM. Shedding Light on the Hidden Benefit of Porphyridium cruentum Culture. Antioxidants (Basel) 2023; 12:antiox12020337. [PMID: 36829897 PMCID: PMC9952601 DOI: 10.3390/antiox12020337] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/04/2023] Open
Abstract
Microalgae can represent a reliable source of natural compounds with different activities. Here, we evaluated the antioxidant and anti-inflammatory activity of sulfated exopolysaccharides (s-EPSs) and phycoerythrin (PE), two molecules naturally produced by the red marine microalga Porphyridium cruentum (CCALA415). In vitro and cell-based assays were performed to assess the biological activities of these compounds. The s-EPSs, owing to the presence of sulfate groups, showed biocompatibility on immortalized eukaryotic cell lines and a high antioxidant activity on cell-based systems. PE showed powerful antioxidant activity both in vitro and on cell-based systems, but purification is mandatory for its safe use. Finally, both molecules showed anti-inflammatory activity comparable to that of ibuprofen and helped tissue regeneration. Thus, the isolated molecules from microalgae represent an excellent source of antioxidants to be used in different fields.
Collapse
Affiliation(s)
- Davide Liberti
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Paola Imbimbo
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
- Correspondence: (P.I.); (D.M.M.)
| | - Enrica Giustino
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Luigi D’Elia
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
| | - Mélanie Silva
- Centre of Marine Sciences, University of Algarve, 8005-139 Faro, Portugal
| | - Luísa Barreira
- Centre of Marine Sciences, University of Algarve, 8005-139 Faro, Portugal
| | - Daria Maria Monti
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy
- Correspondence: (P.I.); (D.M.M.)
| |
Collapse
|
6
|
Li F, Hu X, Sun X, Li H, Lu J, Li Y, Bao M. Effect of fermentation pH on the structure, rheological properties, and antioxidant activities of exopolysaccharides produced by Alteromonas australica QD. Glycoconj J 2022; 39:773-787. [PMID: 36367683 DOI: 10.1007/s10719-022-10087-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/01/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022]
Abstract
The pH value was essential for the growth and metabolism of microorganisms. Acidic pH exopolysaccharide (AC-EPS) and alkaline pH exopolysaccharide (AL-EPS) secreted by A. australica QD mediated by pH were studied in this paper. The total carbohydrate content and molecular weight of AC-EPS (79.59% ± 2.24% (w/w), 8.374 × 105 Da) and AL-EPS (82.48% ± 1.46% (w/w), 6.182 × 105 Da) were estimated and compared. In AC-EPS, mannose (3.78%) and galactose (3.24%) content was more, while the proportion of glucuronic acid was less in comparison to AL-EPS. The scanning electron microscopy revealed the structural differences among the AC-EPS and AL-EPS. Thermogravimetric analysis showed degradation temperatures of 272.8 °C and 244.9 °C for AC-EPS and AL-EPS, respectively. AC-EPS was found to exhibit better rheological properties and emulsifying capabilities, while AL-EPS had superior antioxidant activities. Overall, both AC-EPS and AL-EPS have the potential to be used as emulsifiers and biological antioxidants.
Collapse
Affiliation(s)
- Fengshu Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xin Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xiaojun Sun
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Haoshuai Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Jinren Lu
- College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yiming Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. .,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
| |
Collapse
|
7
|
Enhancement of Metabolite Production in High-Altitude Microalgal Strains by Optimized C/N/P Ratio. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136779] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study evaluated the role of C/N/P in the increase in the synthesis of carbohydrates, proteins, and lipids in two high-mountain strains of algae (Chlorella sp. UFPS019 and Desmodesmus sp. UFPS021). Three carbon sources (sodium acetate, sodium carbonate, and sodium bicarbonate), and the sources of nitrogen (NaNO3) and phosphate (KH2PO4 and K2HPO4) were analyzed using a surface response (3 factors, 2 levels). In Chlorella sp. UFPS019, the optimal conditions to enhance the synthesis of carbohydrates were high sodium carbonate content (3.53 g/L), high KH2PO4 and K2HPO4 content (0.06 and 0.14 g/L, respectively), and medium-high NaNO3 (0.1875 g/L). In the case of lipids, a high concentration of sodium acetate (1.19 g/L) coupled with high KH2PO4 and K2HPO4 content (0.056 and 0.131 g/L, respectively) and a low concentration of NaNO3 (0.075 g/L) drastically induced the synthesis of lipids. In the case of Desmodesmus sp. UFPS021, the protein content was increased using high sodium acetate (2 g/L), high KH2PO4 and K2HPO4 content (0.056 and 0.131 g/L, respectively), and high NaNO3 concentration (0.25 g/L). These results demonstrate that the correct adjustment of the C/N/P ratio can enhance the capacity of high-mountain strains of algae to produce high concentrations of carbohydrates, proteins, and lipids.
Collapse
|
8
|
Laroche C. Exopolysaccharides from Microalgae and Cyanobacteria: Diversity of Strains, Production Strategies, and Applications. Mar Drugs 2022; 20:md20050336. [PMID: 35621987 PMCID: PMC9148076 DOI: 10.3390/md20050336] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/14/2022] [Accepted: 05/18/2022] [Indexed: 12/04/2022] Open
Abstract
Microalgae and cyanobacteria are photosynthetic organisms that can produce/accumulate biomolecules with industrial interest. Among these molecules, EPSs are macromolecular polysaccharidic compounds that present biological activities and physico-chemical properties, allowing to consider their valorization in diverse commercial markets, such as cosmetic, therapeutic, nutraceutic, or hydrocolloids areas. The number of microalgae and cyanobacteria strains described to produce such EPSs has increased in recent years as, among the 256 producing strains gathered in this review, 86 were published in the last 10 years (~33%). Moreover, with the rise of research on microalgae EPSs, a variety of monosaccharides compositions have been discovered, highlighting the versatility of these organisms. If some production strategies can be applied to increase EPS production yields, it appears that case by case studies are needed to promote EPS synthesis by a strain, as many responses exist. This paper proposes an up-to-date state of the art of the diversity of microalgae and cyanobacteria EPS-producing strains, associated to the variability of compositions. The strategies for the production and extraction of the polymers are also discussed. Finally, an overview of the biological activities and physico-chemical properties allow one to consider their use on several commercial markets.
Collapse
Affiliation(s)
- Céline Laroche
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont-Auvergne, F-63000 Clermont-Ferrand, France
| |
Collapse
|
9
|
Qiao J, Zhan Y, Tan X, Liu Y, Hu X, Wang X. Colanic Acid: Biosynthetic Overproduction by Engineering Escherichia coli and Physical Property Characterization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13881-13894. [PMID: 34763421 DOI: 10.1021/acs.jafc.1c04823] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Colanic acid has promising applications in food, cosmetic, and healthcare fields. In this study, a recombinant WQM003/pRAU was constructed by deleting genes lon and hns and overexpressing genes rcsA and galU in E. coli MG1655Δ(L-Q). After systematic optimization of fermentation conditions, colanic acid yield in WQM003/pRAU reached 19.79 g/L, the highest yield reported so far. The colanic acid produced by WQM003/pRAU was purified and its structure and physical properties were determined. This colanic acid shows a triple-helical structure and is stable up to 102 °C, and its melting temperature is 253.9 °C. This colanic acid shows a sphere-like chain conformation in aqueous solution. The viscosity of this colanic acid solution is related to concentration, shear rate, salt, temperature, and pH. At high concentrations, this colanic acid shows both viscous and elastic behaviors. These results suggest that the colanic acid produced by WQM003/pRAU has broad application prospects.
Collapse
Affiliation(s)
- Jun Qiao
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yi Zhan
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xin Tan
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yuantao Liu
- Hulunbeier Northeast Fufeng Biotechnology Co., Ltd., Hulunbeier 162650, China
| | - Xiaoqing Hu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
| | - Xiaoyuan Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
10
|
Zhang L, Zhang W, Peng F, Chen H, Shu G. Effects of bacterial cellulose on glucose metabolism in an
in vitro
chyme model and its rheological evaluation. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Le‐Le Zhang
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi’an 710021 China
| | - Wen Zhang
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi’an 710021 China
| | - Fa‐Bo Peng
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi’an 710021 China
| | - He Chen
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi’an 710021 China
| | - Guo‐Wei Shu
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi’an 710021 China
| |
Collapse
|
11
|
Gargouch N, Elleuch F, Karkouch I, Tabbene O, Pichon C, Gardarin C, Rihouey C, Picton L, Abdelkafi S, Fendri I, Laroche C. Potential of Exopolysaccharide from Porphyridium marinum to Contend with Bacterial Proliferation, Biofilm Formation, and Breast Cancer. Mar Drugs 2021; 19:66. [PMID: 33513982 PMCID: PMC7911520 DOI: 10.3390/md19020066] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/18/2022] Open
Abstract
Exopolysaccharide (EPS) from marine microalgae are promising sources of a new generation of drugs. However, lot of them remain to be discovered and tested. In this study, EPS produced by Porphyridium marinum and its oligomers prepared by High Pressure Homogenizer have been tested for different biological activities, i.e., antibacterial, anti-fungal and antibiofilm activities on Candida albicans, as well as for their effects on the viability of murine breast cancer cells. Results have shown that all EPS samples present some biological activity. For antibacterial and antibiofilm activities, the native EPS exhibited a better efficiency with Minimum Inhibitory Concentration (MIC) from 62.5 µg/mL to 1000 µg/mL depending on the bacterial strain. For Candida albicans, the biofilm formation was reduced by about 90% by using only a 31.3 µg/mL concentration. Concerning breast cancer cells, lower molar masses fractions appeared to be more efficient, with a reduction of viability of up to 55%. Finally, analyses of polymers composition and viscosity measurements were conducted on all samples, in order to propose hypotheses involving the activities caused by the intrinsic properties of polymers.
Collapse
Affiliation(s)
- Nesrine Gargouch
- Institut Pascal, CNRS, SIGMA Clermont, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France; (N.G.); (C.G.)
- Laboratoire de Biotechnologie Végétale Appliquée à l’Amélioration des Cultures, Faculty of Sciences of Sfax, University of Sfax, Sfax 3000, Tunisia;
| | - Fatma Elleuch
- Centre de Biophysique Moléculaire, CNRS-UPR 4301, 45071 Orléans, France; (F.E.); (C.P.)
- Unité de Biotechnologie des Algues, Biological Engineering Department, National School of Engineers of Sfax, University of Sfax, Sfax 3038, Tunisia;
| | - Ines Karkouch
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria (CBBC), BP-901, Hammam-Lif 2050, Tunisia; (I.K.); (O.T.)
| | - Olfa Tabbene
- Laboratory of Bioactive Substances, Biotechnology Center of Borj-Cedria (CBBC), BP-901, Hammam-Lif 2050, Tunisia; (I.K.); (O.T.)
| | - Chantal Pichon
- Centre de Biophysique Moléculaire, CNRS-UPR 4301, 45071 Orléans, France; (F.E.); (C.P.)
| | - Christine Gardarin
- Institut Pascal, CNRS, SIGMA Clermont, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France; (N.G.); (C.G.)
| | - Christophe Rihouey
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France; (C.R.); (L.P.)
| | - Luc Picton
- Normandie University, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France; (C.R.); (L.P.)
| | - Slim Abdelkafi
- Unité de Biotechnologie des Algues, Biological Engineering Department, National School of Engineers of Sfax, University of Sfax, Sfax 3038, Tunisia;
| | - Imen Fendri
- Laboratoire de Biotechnologie Végétale Appliquée à l’Amélioration des Cultures, Faculty of Sciences of Sfax, University of Sfax, Sfax 3000, Tunisia;
| | - Céline Laroche
- Institut Pascal, CNRS, SIGMA Clermont, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France; (N.G.); (C.G.)
| |
Collapse
|