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Arthrospira platensis

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https://www.readbyqxmd.com/read/30486288/an-improved-genome-scale-metabolic-model-of-arthrospira-platensis-c1-i-ak888-and-its-application-in-glycogen-overproduction
#1
Amornpan Klanchui, Sudarat Dulsawat, Kullapat Chaloemngam, Supapon Cheevadhanarak, Peerada Prommeenate, Asawin Meechai
Glycogen-enriched biomass of Arthrospira platensis has increasingly gained attention as a source for bioethanol production. To study the metabolic capabilities of glycogen production in A. platensis C1, a genome-scale metabolic model (GEM) could be a useful tool for predicting cellular behavior and suggesting strategies for glycogen overproduction. New experimentally validated GEM of A. platensis C1 namely i AK888, which has improved metabolic coverage and functionality was employed in this research. The i AK888 is a fully functional compartmentalized GEM consisting of 888 genes, 1,096 reactions, and 994 metabolites...
November 26, 2018: Metabolites
https://www.readbyqxmd.com/read/30388801/microalgae-characterization-for-consolidated-and-new-application-in-human-food-animal-feed-and-nutraceuticals
#2
Antonio Molino, Angela Iovine, Patrizia Casella, Sanjeet Mehariya, Simeone Chianese, Antonietta Cerbone, Juri Rimauro, Dino Musmarra
The exploration of new food sources and natural products is the result of the increase in world population as well as the need for a healthier diet; in this context, microalgae are undoubtedly an interesting solution. With the intent to enhance their value in new commercial applications, this paper aims to characterize microalgae that have already been recognized as safe or authorized as additives for humans and animals ( Chlorella vulgaris , Arthrospira platensis , Haematococcus pluvialis , Dunaliella salina ) as well as those that have not yet been marketed ( Scenedesmus almeriensis and Nannocholoropsis sp...
November 1, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/30296746/recovery-of-chlorophylls-from-spent-biomass-of-arthrospira-platensis-obtained-after-extraction-of-phycobiliproteins
#3
Hrishikesh A Tavanandi, K S M S Raghavarao
Extraction of chlorophylls has received scant attention or priority over phycobiliproteins from Arthrospira platensis. In fact extraction of chlorophylls from spent biomass (left after extraction of phycobiliproteins which goes as waste or underutilized) on drying, will improve the economics of the overall downstream processing. Ethanol (yield 5.75 mg/g, db), being a food grade solvent, was preferred over acetone and dimethyl sulfoxide in spite of their slightly better yields (5.85 mg/g, db). The best conditions were 100% concentration of ethanol, 1:8 S/L ratio, pH 6, 50 °C temperature and 1 h extraction time...
January 2019: Bioresource Technology
https://www.readbyqxmd.com/read/30159640/insight-into-arthrospira-platensis-%C3%AE-9-desaturase-a-key-enzyme-in-poly-unsaturated-fatty-acid-synthesis
#4
Faten Ben Amor, Hajer Ben Hlima, Slim Abdelkafi, Imen Fendri
Membrane-bound Δ9 desaturase perform oxygenated desaturation reactions to insert the first double bonds within fatty acyl chains between C9 and C10 positions of most saturated substrates. Arthrospira platensis, a blue green microalga, is an important source of polyunsaturated fatty acids (PUFA) such as oleic, linoleic and linolenic acids lending benefits and functions in dietetics and therapeutic uses. In this paper, we report homology modeling and docking studies of a Δ9 desaturase from Arthrospira platensis strain...
August 29, 2018: Molecular Biology Reports
https://www.readbyqxmd.com/read/30159589/stable-transformation-of-spirulina-arthrospira-platensis-a-promising-microalga-for-production-of-edible-vaccines
#5
Jaber Dehghani, Khosro Adibkia, Ali Movafeghi, Abolfazl Barzegari, Mohammad M Pourseif, Hadi Maleki Kakelar, Asal Golchin, Yadollah Omidi
The planktonic blue-green microalga Spirulina (Arthrospira) platensis possesses important features (e.g., high protein and vital lipids contents as well as essential vitamins) and can be consumed by humans and animals. Accordingly, this microalga gained growing attention as a new platform for producing edible-based pharmaceutical proteins. However, there are limited successful strategies for the transformation of S. platensis, in part because of an efficient expression of strong endonucleases in its cytoplasm...
November 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/30144753/enhancing-vorticity-magnitude-of-turbulent-flow-to-promote-photochemical-efficiency-and-trichome-helix-pitch-of-arthrospira-platensis-in-a-raceway-pond-with-conic-baffles
#6
Jun Cheng, Wangbiao Guo, Yanmei Song, Santosh Kumar, Kubar Ameer Ali, Junhu Zhou
In order to clarify vortex mechanisms under a turbulent flow field to explain enhanced biomass productivity, computational fluid dynamics and a miniature Doppler velocimeter were employed to investigate the promoted vorticity magnitude and turbulent kinetic energy to support the increased actual photochemical efficiency of Arthrospira platensis in a raceway pond with alternatively permutated conic baffles. Results showed that whereas the first two parameters increased by 5.9 and 13.9 times, respectively, the third rose on an average by 28% to the value of 0...
December 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30138569/potential-protective-effects-of-the-edible-algae-arthrospira-platensis-against-lead-induced-oxidative-stress-anemia-kidney-variables-and-histopathological-changes-in-adult-rats
#7
Manel Gargouri, Ahlem Soussi, Amel Akrouti, Christian Magné, Abdelfattah El Feki
Oxidative damage has been proposed as a possible mechanism involved in lead toxicity. This study aimed at investigating the possible protective effect of dietary Arthrospira platensis supplementation against lead acetate-induced kidney injury in adult rats. We took adult male rats as models. Rats were divided into 4 groups: Normal rats (control rats, C), rats treated with spirulina (S), rats treated with lead (0.344 g/kg body weight) (Pb), and rats treated with Pb associated with 5% Spirulina (S+Pb). The exposure of rats to Pb for 30 days provoked renal damages with a significant increase in hematological parameters, oxidative stress-related parameters (ie, thiobarbituric acid reactive substances, protein carbonyl, advanced oxidation protein products and hydrogen peroxide), creatinine and urea levels in plasma and uric acid level in urine...
August 23, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/30126131/two-classes-of-pigments-carotenoids-and-c-phycocyanin-in-spirulina-powder-and-their-antioxidant-activities
#8
Woo Sung Park, Hye-Jin Kim, Min Li, Dong Hoon Lim, Jungmin Kim, Sang-Soo Kwak, Chang-Min Kang, Mario G Ferruzzi, Mi-Jeong Ahn
Arthrospira platensis is the widely available source of spirulina that contains distinctive natural pigments, including carotenoids and C-phycocyanin (C-PC). In this study, the major carotenoid and C-PC contents were determined in seven commercially available spirulina powder products and laboratory-prepared A. platensis trichomes (AP-1) by an LC-DAD method and UV-Visible spectrometry, respectively. The correlation of these two pigment content levels with Hunter color coordinates and antioxidant activity was also evaluated...
August 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30107441/single-amino-acid-change-in-6-phosphogluconate-dehydrogenase-from-synechocystis-conveys-higher-affinity-for-nadp-and-altered-mode-of-inhibition-by-nadph
#9
Shoki Ito, Takashi Osanai
In the oxidative pentose phosphate pathway, 6-phosphogluconate dehydrogenase (6PGDH, EC 1.1.1.44) is one of the enzymes that catalyzes reactions generating NADPH. The model cyanobacterium Synechocystis sp. PCC 6803 is widely studied for numerous applications; however, biochemical knowledge of the NADPH production pathway in Synechocystis sp. PCC 6803 is limited. In this study, we conducted biochemical analysis of a 6-phosphogluconate dehydrogenase from Synechocystis sp. PCC 6803 (Sy6PGDH). We found that Sy6PGDH has unconventional characteristics, that is, the highest kcat value and non-competitive inhibition by NADPH...
August 10, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29978380/molecular-insight-into-the-metabolic-activities-of-a-protein-rich-micro-alga-arthrospira-platensis-by-de-novo-transcriptome-analysis
#10
Venkatesh Kumaresan, Anbazahan Sannasimuthu, Mariadhas Valan Arasu, Naif Abdullah Al-Dhabi, Jesu Arockiaraj
To gain genetic insights into the protein-rich microalga, the transcriptome of Arthrospira platensis was sequenced using Illumina technology and de novo assembly was carried out. A total of 6023 transcripts were present in the transcriptome among which 4616 transcripts were annotated with specific functions. Gene ontology analysis revealed that the genes are mainly involved in three major functions such as biological (16.19%), cellular (41.47%) and molecular (42.34%) processes. Pathway analysis indicated that majority of genes are involved in amino acid biosynthesis and metabolism which is depicting the protein-rich nature of spirulina...
October 2018: Molecular Biology Reports
https://www.readbyqxmd.com/read/29966973/anticancer-effect-of-the-water-extract-of-a-commercial-spirulina-arthrospira-platensis-product-on-the-human-lung-cancer-a549-cell-line
#11
Arkadiusz Czerwonka, Katarzyna Kaławaj, Adrianna Sławińska-Brych, Marta K Lemieszek, Magdalena Bartnik, Krzysztof K Wojtanowski, Barbara Zdzisińska, Wojciech Rzeski
Spirulina is a well-described and popular dietary supplement derived from Arthrospira algae. In the present study, the anticancer potential of a water extract of a commercial Spirulina product (SE) against the human non-small-cell lung carcinoma A549 cell line was evaluated. After qualitative analysis, we investigated the effect of SE on cell viability, proliferation, and morphology. Furthermore, the influence of SE on regulation of the cell cycle, induction of apoptosis in lung cancer cells, and expression of cell cycle/apoptosis-related proteins was evaluated...
October 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29906715/comprehensive-pulsed-electric-field-pef-system-analysis-for-microalgae-processing
#12
Leandro Buchmann, Robin Bloch, Alexander Mathys
Pulsed electric field (PEF) is an emerging nonthermal technique with promising applications in microalgae biorefinery concepts. In this work, the flow field in continuous PEF processing and its influencing factors were analyzed and energy input distributions in PEF treatment chambers were investigated. The results were obtained using an interdisciplinary approach that combined multiphysics simulations with ultrasonic Doppler velocity profiling (UVP) and rheological measurements of Arthrospira platensis suspensions as a case study for applications in the biobased industry...
October 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29881359/immunohistochemical-characterization-of-pept1-and-ghrelin-in-gastrointestinal-tract-of-zebrafish-effects-of-spirulina-vegetarian-diet-on-the-neuroendocrine-system-cells-after-alimentary-stress
#13
Patrizia Lo Cascio, Concetta Calabrò, Clara Bertuccio, Carmelo Iaria, Fabio Marino, Maria G Denaro
Gastrointestinal function in vertebrates is influenced by stressors, such as fasting and refeeding, different types of diet and hormonal factors. The aim of this paper was to analyze the effect of a Spirulina ( Arthrospira platensis ) diet, a microalga known for its nutraceutical properties, on the gastrointestinal tract of zebrafish ( Danio rerio ) regarding expression of oligopeptide transporter 1 (PepT1) and ghrelin (GHR). Food deprivation and refeeding was investigated to elucidate expression of PepT1 and GHR at a gastrointestinal level and the zebrafish compensatory mechanism...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29876145/cytotoxic-effects-of-zinc-oxide-nanoparticles-on-cyanobacterium-spirulina-arthrospira-platensis
#14
Sinouvassane Djearamane, Yang Mooi Lim, Ling Shing Wong, Poh Foong Lee
Background: The extensive usage of zinc oxide nanoparticles (ZnO NPs) in industrial and consumer products raises the risk of releasing their residues into the aquatic environment. The presence of ZnO NPs in the aquatic environment could potentially cause cytotoxic effects on aquatic organisms. Thus, investigating the cytotoxic effects of ZnO NPs on microalgae, which form the base for the food web of aquatic biota, is essential to gain information regarding the ecotoxicological effects of metallic oxide nanoparticles in the aquatic ecosystem...
2018: PeerJ
https://www.readbyqxmd.com/read/29873533/zinc-removal-from-model-solution-and-wastewater-by-arthrospira-spirulina-platensis-biomass
#15
Inga Zinicovscaia, Nikita Yushin, Margarita Shvetsova, Marina Frontasyeva
The biosorption of zinc from model solution as well as wastewater by Arthrospira (Spirulina) platensis biomass was studied. Adsorption capacity of the biosorbent was investigated as a function of contact time between adsorbent and zinc, the initial metals and sorbent concentration, pH value, and temperature. The ability of Arthrospira biomass for zinc biosorption exhibited a maximum at the pH range 4-8. Equilibrium data fitted well with the Langmuir model as well as the Freundlich model with maximum adsorption capacity of 7...
July 29, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29852372/dietary-supplementation-of-spirulina-ameliorates-iron-induced-oxidative-stress-in-indian-knife-fish-notopterus-notopterus
#16
Deepali Mohanty, Luna Samanta
Iron though an essential cofactor for many proteins including haemoglobin and cytochromes, when in excess (>1 ppm in water and 100 ppm in fish tissue) elicits toxicity via Fenton reaction inducing oxidative stress. The present study aimed to evaluate the efficacy of dietary Spirulina (Arthrospira platensis) supplementation on waterborne-iron induced oxidative stress in the tissues of Notopterus notopterus. Juvenile fishes were divided randomly into 4 groups, namely, Group-I: control fed with commercial diet only, Group-II, III and IV treated with 0...
July 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29775741/replacement-of-fishmeal-by-spirulina-arthrospira-platensis-affects-growth-immune-related-gene-expression-in-gibel-carp-carassius-auratus-gibelio-var-cas-iii-and-its-challenge-against-aeromonas-hydrophila-infection
#17
Shenping Cao, Peiyu Zhang, Tao Zou, Shuzhan Fei, Dong Han, Junyan Jin, Haokun Liu, Yunxia Yang, Xiaoming Zhu, Shouqi Xie
The present study examined the effect of dietary spirulina, Arthrospira platensis on growth performance, blood physiological indices, immune-related gene expressions and resistance of juvenile gibel carp against Aeromonas hydrophila infection. Four isonitrogenous (360 g kg-1 ) and isolipidic (90 g kg-1 ) diets were formulated with containing different levels of spirulina powder of 0 g (SP0, the control diet), 3.38 g (SP3.38), 6.76 g (SP6.76) and 13.52 g (SP13.52) per 100 g diet to replace 0%, 25%, 50% and 100% of fishmeal protein, respectively...
August 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29773168/m%C3%A3-ssbauer-spectroscopic-study-of-transformations-of-iron-species-by-the-cyanobacterium-arthrospira-platensis-formerly-spirulina-platensis
#18
Yurii D Perfiliev, Alexandr Kh Tambiev, Maxim A Konnychev, Anatoly V Skalny, Elena S Lobakova, Mikhail P Kirpichnikov
In the present paper, Mössbauer spectroscopic studies of dry biomass samples of the cyanobacterium Arthrospira platensis (formerly known as Spirulina platensis) were performed with regard to metabolic iron accumulation. 57 Fe Mössbauer parameters of iron in the biomass correspond to ferrihydrite. Spectra of iron hydroxides in A. platensis biomass differ from those of iron complexes with ethylenediaminetetraacetic acid injected to Zarrouk culture medium. The limit of saturation of A. platensis trichomes with iron in the form of ferrihydrite was found to be 5 μg/ml (0...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29751637/fast-profiling-of-natural-pigments-in-different-spirulina-arthrospira-platensis-dietary-supplements-by-di-ft-icr-and-evaluation-of-their-antioxidant-potential-by-pre-column-dpph-uhplc-assay
#19
Eduardo Sommella, Giulio Maria Conte, Emanuela Salviati, Giacomo Pepe, Alessia Bertamino, Carmine Ostacolo, Francesca Sansone, Francesco Del Prete, Rita Patrizia Aquino, Pietro Campiglia
Arthrospira platensis , better known as Spirulina, is one of the most important microalgae species. This cyanobacterium possesses a rich metabolite pattern, including high amounts of natural pigments. In this study, we applied a combined strategy based on Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR-MS) and Ultra High-Performance Liquid Chromatography (UHPLC) for the qualitative/quantitative characterization of Spirulina pigments in three different commercial dietary supplements. FT-ICR was employed to elucidate the qualitative profile of Spirulina pigments, in both direct infusion mode (DIMS) and coupled to UHPLC...
May 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29746494/the-biomechanical-role-of-overall-shape-transformation-in-a-primitive-multicellular-organism-a-case-study-of-dimorphism-in-the-filamentous-cyanobacterium-arthrospira-platensis
#20
Atitheb Chaiyasitdhi, Wirat Miphonpanyatawichok, Mathis Oliver Riehle, Rungrueang Phatthanakun, Werasak Surareungchai, Worasom Kundhikanjana, Panwong Kuntanawat
Morphological transformations in primitive organisms have long been observed; however, its biomechanical roles are largely unexplored. In this study, we investigate the structural advantages of dimorphism in Arthrospira platensis, a filamentous multicellular cyanobacterium. We report that helical trichomes, the default shape, have a higher persistence length (Lp), indicating a higher resistance to bending or a large value of flexural rigidity (kf), the product of the local cell stiffness (E) and the moment of inertia of the trichomes' cross-section (I)...
2018: PloS One
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