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https://www.readbyqxmd.com/read/28433155/a-highly-regular-fucosylated-chondroitin-sulfate-from-the-sea-cucumber-massinium-magnum-structure-and-effects-on-coagulation
#1
Nadezhda E Ustyuzhanina, Maria I Bilan, Andrey S Dmitrenok, Elizaveta Yu Borodina, Valentin A Stonik, Nikolay E Nifantiev, Anatolii I Usov
A fucosylated chondroitin sulfate MM was isolated from the sea cucumber Massinium magnum. Structure of this polysaccharide was determined using chemical and NMR spectroscopic methods. The backbone of MM was shown to consist mainly of chondroitin sulfate E units with a small portion (about 10%) of chondroitin sulfate A fragments. Practically one type of branches Fuc3S4S attached to O-3 of GlcA residues was found in the polysaccharide molecules. The main repeating units of MM are →4)-[α-l-Fuc3S4S-(1→3)]-β-d-GlcA-(1→3)-β-d-GalNAc4S6S-(1→, whereas the minor repeating units are →4)-[α-l-Fuc3S4S-(1→3)]-β-d-GlcA-(1→3)-β-d-GalNAc4S-(1→...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28414789/effect-of-ph-on-temperature-controlled-degradation-of-reactive-oxygen-species-heat-shock-protein-expression-and-mucosal-immunity-in-the-sea-cucumber-isostichopus-badionotus
#2
Mariel Gullian Klanian, Montserrat Terrats Preciat
This study evaluated the effect of pH on the activity of antioxidant and immune enzymes in the sea cucumber Isostichopus badionotus exposed to different temperatures. The organisms (530 ±110 g) were exposed to 16, 20, 24, 28, 30, 34 and 36°C for 6 h to evaluate thermal limits at two water pH values (treatment = 7.70; control = 8.17). For the thermal tolerance experiment, the organisms were exposed to sublethal temperature of 34°C for 3, 6, 12, 24, and 48 h. I. badionotus showed signs of thermal stress by synthesizing heat shock protein 70 (hsp70) at the cold (16°C) and warm thermal limits (34°C)...
2017: PloS One
https://www.readbyqxmd.com/read/28407960/contributions-of-molecular-size-charge-distribution-and-specific-amino-acids-to-the-iron-binding-capacity-of-sea-cucumber-stichopus-japonicus-ovum-hydrolysates
#3
Na Sun, Pengbo Cui, Ziqi Jin, Haitao Wu, Yixing Wang, Songyi Lin
This study investigated the contributions of molecular size, charge distribution and specific amino acids to the iron-binding capacity of sea cucumber (Stichopus japonicus) ovum hydrolysates (SCOHs), and further explored their iron-binding sites. It was demonstrated that enzyme type and degree of hydrolysis (DH) significantly influenced the iron-binding capacity of the SCOHs. The SCOHs produced by alcalase at a DH of 25.9% possessed the highest iron-binding capacity at 92.1%. As the hydrolysis time increased, the molecular size of the SCOHs decreased, the negative charges increased, and the hydrophilic amino acids were exposed to the surface, facilitating iron binding...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28406733/cerebrosides-from-sea-cucumber-protect-against-oxidative-stress-in-samp8-mice-and-pc12-cells
#4
Hongxia Che, Lei Du, Peixu Cong, Suyuan Tao, Ning Ding, Fengjuan Wu, Changhu Xue, Jie Xu, Yuming Wang
Alzheimer's disease (AD) is a neurodegenerative disorder. Emerging evidence implicates β-amyloid (Aβ) plays a critical role in the progression of AD. In this study, we investigated the protective effect of cerebrosides obtained from sea cucumber against senescence-accelerated mouse prone 8 (SAMP8) mice in vivo. We also studied the effect of cerebrosides on Aβ-induced cytotoxicity on the rat pheochromocytoma cell (PC12) and the underlying molecular mechanisms. Cerebrosides ameliorated learning and memory deficits and the Aβ accumulation in demented mice, decreased the content of malondialdehyde (MDA), 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-OHdG), 8-hydroxy-2'-deoxyguanosine (8-oxo-G), and nitric oxide (NO), and enhanced the superoxide dismutase (SOD) activity significantly...
April 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28402186/inhibition-of-hafnia-alvei-h4-biofilm-formation-by-the-food-additive-dihydrocoumarin
#5
Hong Man Hou, Feng Jiang, Gong Liang Zhang, Jia Y Wang, Ya H Zhu, Xin Y Liu
Quorum sensing (QS) is an intercellular signaling and gene regulatory mechanism that is implicated in food spoilage caused by bacteria. Thus, blocking QS may suppress QS-controlled phenotypes of these bacteria that are responsible for food spoilage. Biofilm formation is closely related to bacterial infection, and it is also a major mechanism responsible for the increased resistance of biofilm-associated bacteria to antimicrobial drugs. Food spoilage and biofilm formation caused by food-related bacteria have posed a significant problem for the food industry...
April 12, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28397256/the-application-of-compound-specific-isotope-analysis-of-fatty-acids-for-traceability-of-sea-cucumber-apostichopus-japonicus-in-the-coastal-areas-of-china
#6
Yu Liu, Xufeng Zhang, Ying Li, Haixia Wang
BACKGROUND: Geographical origin traceability is an important issue in controlling the quality of seafood and in safeguarding the interest of consumers. In this study, a new method of compound-specific isotope analysis (CSIA) of fatty acids was established to evaluate its applicability in establishing the origin traceability of Apostichopus japonicus in the coastal areas of China. Principal component analysis (PCA) and discriminant analysis (DA) were applied to distinguish between origins of A...
April 10, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28395211/antioxidant-and-antiapoptotic-effects-of-sea-cucumber-and-valsartan-against-doxorubicin-induced-cardiotoxicity-in-rats-the-role-of-low-dose-gamma-irradiation
#7
Doaa M Ibrahim, Rasha R Radwan, Salma M Abdel Fattah
Doxorubicin (DOX) is a highly effective antineoplastic drug; however, the clinical use of DOX is limited by its dose dependent cardiotoxicity. This study was conducted to evaluate the cardioprotective effect of sea cucumber and valsartan against DOX-induced cardiotoxicity in rats. Also, the role of exposure to low dose γ radiation (LDR) on each of them was investigated, since LDR could suppress various reactive oxygen species-related diseases. Rats received DOX (2.5mg/kg, ip) in six equal injections over a period of 2weeks, sea cucumber (14...
March 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28392464/anticancer-and-cancer-preventive-compounds-from-edible-marine-organisms
#8
REVIEW
Marta Correia-da-Silva, Emília Sousa, Madalena M M Pinto, Anake Kijjoa
A direct impact of food on health, which demonstrates that dietary habit is one of the most important determinants of chronic diseases such as cancers, has led to an increased interest of the consumers toward natural bioactive compounds as functional ingredients or nutraceuticals. Epidemiological studies revealed that the populations of many Asian countries with high consumption of fish and seafood have low prevalence of particular type of cancers such as lung, breast, colorectal and prostate cancers. This observation has led to extensive investigations of the benefits of compounds present in edible marine organisms such as fish, marine invertebrates (mollusks, echinoderms) and marine algae as cancer chemopreventive agents...
April 6, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28379194/characteristics-of-n-acylhomoserine-lactones-produced-by-hafnia-alvei-h4-isolated-from-spoiled-instant-sea-cucumber
#9
Hong-Man Hou, Yao-Lei Zhu, Jia-Ying Wang, Feng Jiang, Wen-Yan Qu, Gong-Liang Zhang, Hong-Shun Hao
This study aimed to identify N-acylhomoserine lactone (AHL) produced by Hafnia alvei H4, which was isolated from spoiled instant sea cucumber, and to investigate the effect of AHLs on biofilm formation. Two biosensor strains, Chromobacterium violaceum CV026 and Agrobacterium tumefaciens KYC55, were used to detect the quorum sensing (QS) activity of H. alvei H4 and to confirm the existence of AHL-mediated QS system. Thin layer chromatography (TLC) and high resolution triple quadrupole liquid chromatography/mass spectrometry (LC/MS) analysis of the AHLs extracted from the culture supernatant of H...
April 5, 2017: Sensors
https://www.readbyqxmd.com/read/28373597/mechanical-adaptability-of-sea-cucumber-cuvierian-tubules-involves-a-mutable-collagenous-tissue
#10
Mélanie Demeuldre, Elise Hennebert, Marie Bonneel, Birgit Lengerer, Séverine Van Dyck, Ruddy Wattiez, Peter Ladurner, Patrick Flammang
Despite their soft body and slow motion, sea cucumbers present a low predation rate, reflecting the presence of efficient defence systems. For instance, members of the family Holothuriidae rely on Cuvierian tubules for their defence. These tubules are normally stored in the posterior coelomic cavity of the animal, but when the sea cucumber is threatened by a potential predator, they are expelled through the cloacal aperture, elongate, become sticky and entangle and immobilize the predator in a matter of seconds...
April 3, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28369350/draft-genome-of-the-sea-cucumber-apostichopus-japonicus-and-genetic-polymorphism-among-color-variants
#11
Jihoon Jo, Jooseong Oh, Hyun-Gwan Lee, Hyun-Hee Hong, Sung-Gwon Lee, Seongmin Cheon, Elizabeth M A Kern, Soyeong Jin, Sung-Jin Cho, Joong-Ki Park, Chungoo Park
The Japanese sea cucumber (Apostichopus japonicus Selenka 1867) is an economically important species as a source of seafood and ingredient in traditional medicine. It is mainly found off the coasts of northeast Asia. Recently, substantial exploitation and widespread biotic diseases in A. japonicus have generated increasing conservation concern. However, the genomic knowledge base and resources available for researchers to use in managing this natural resource and to establish genetically based breeding systems for sea cucumber aquaculture are still in a nascent stage...
January 1, 2017: GigaScience
https://www.readbyqxmd.com/read/28363577/the-structure-of-a-fucosylated-chondroitin-sulfate-from-the-sea-cucumber-cucumaria-frondosa
#12
Nadezhda E Ustyuzhanina, Maria I Bilan, Andrey S Dmitrenok, Alexander S Shashkov, Nikolay E Nifantiev, Anatolii I Usov
A fucosylated chondroitin sulfate (FCS) CF was isolated from the sea cucumber Cucumaria frondosa and purified by anion-exchange chromatography. Chemical and NMR spectroscopic methods were applied for the structural characterization of this biopolymer. The backbone of CF was found to consist of chondroitin sulfate A and E fragments together with rather uncommon disaccharide repeating units →3)-β-d-GalNAc4S6S-(1→4)-β-d-GlcA3S-(1→ and →3)-β-d-GalNAc4S-(1→4)-β-d-GlcA3S-(1→. Three types of branches were found in molecules of CF...
June 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28362352/optimization-of-bromelain-aided-production-of-angiotensin-i-converting-enzyme-inhibitory-hydrolysates-from-stone-fish-using-response-surface-methodology
#13
Shehu Muhammad Auwal, Mohammad Zarei, Azizah Abdul-Hamid, Nazamid Saari
The stone fish is an under-utilized sea cucumber with many nutritional and ethno-medicinal values. This study aimed to establish the conditions for its optimum hydrolysis with bromelain to generate angiotensin I-converting enzyme (ACE)-inhibitory hydrolysates. Response surface methodology (RSM) based on a central composite design was used to model and optimize the degree of hydrolysis (DH) and ACE-inhibitory activity. Process conditions including pH (4-7), temperature (40-70 °C), enzyme/substrate (E/S) ratio (0...
March 31, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28359949/establishment-of-lysozyme-gene-rna-interference-systemand-its-involvement-in-salinity-tolerance-in-sea-cucumber-apostichopus-japonicus
#14
Yi Tian, Yanan Jiang, Yanpeng Shang, Yu-Peng Zhang, Chen-Fan Geng, Li-Qiang Wang, Ya-Qing Chang
The lysozyme gene was silenced using RNA interference (RNAi) to analyze the function of lysozyme in sea cucumber under salt stress. The interfering efficiency of four lysozyme RNAi oligos ranged from 0.55 to 0.70. From the four oligos, p-miR-L245 was used for further interfering experiments because it had the best silencing efficiency. Peristomial film injection of p-miR-L245 (10 μg) was used for further interfering experiments. The lowest gene expression, determined by RT-PCR assay, in muscle, coelomic fluid, and parapodium occurred 48 h after p-miR-L245 injection, while that of body wall and tube foot was 96 h and 24 h, respectively...
March 28, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28349531/characterization-of-sea-cucumber-stichopus-japonicus-ovum-hydrolysates-calcium-chelation-solubility-and-absorption-into-intestinal-epithelial-cells
#15
Na Sun, Pengbo Cui, Songyi Lin, Cuiping Yu, Yue Tang, Ye Wei, Youling Xiong, Haitao Wu
BACKGROUND: Sea cucumber (stichopus japonicus) ovum hydrolysates (SCOHs) chelated with calcium were produced to investigate the characteristics of calcium binding and solubility, as well as study its effect on calcium absorption by human intestinal epithelial cells. RESULTS: It is demonstrated that the calcium-binding capacity of SCOHs depended greatly on the type of proteases. The maximum level of Ca binding (0.38 mmol/L) occurred when trypsin was used, with a peptide yield of 85...
March 27, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28337772/anti-fatigue-activity-of-sea-cucumber-peptides-prepared-from-stichopus-japonicas-in-an-endurance-swimming-rat-model
#16
Jing Ye, Shen Caihong, Huang Yayan, Xueqin Zhang, Xiao Meitian
BACKGROUND: Sea cucumber (Stichopus japonicus) is a well-known nutritious and luxurious seafood in Asia which has attracted increasing attention because of its nutrition and bioactivities in recent years. In this study, the anti-fatigue activity of sea cucumber peptides (SCP) prepared from Stichopus japonicas was evaluated in a load-induced endurance swimming model. RESULTS: The SCP prepared in this study was mainly made up of low-molecular-weight peptides (<2 kDa)...
March 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28325347/two-fucosylated-chondroitin-sulfates-from-the-sea-cucumber-eupentacta-fraudatrix
#17
Nadezhda E Ustyuzhanina, Maria I Bilan, Andrey S Dmitrenok, Nikolay E Nifantiev, Anatolii I Usov
Two fucosylated chondroitin sulfates EF1 and EF2 were isolated from the sea cucumber Eupentacta fraudatrix. Separation of the polysaccharides was performed using anion-exchange chromatography on DEAE-Sephacel by elution of 0.75M and 1.0M NaCl solutions. The structures of biopolymers were determined by chemical and NMR spectroscopic methods. The backbone of EF1 was found to be composed of chondroitin sulfate A and E units in a ratio of about 1:1. The core of EF2 along with chondroitin sulfate A and E fragments contained unusual disaccharide repeating units →4)-β-d-GlcpA2S3S-(1→3)-β-d-GalpNAc6S-(1→...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28298684/effects-of-heat-treatment-on-the-gel-properties-of-the-body-wall-of-sea-cucumber-apostichopus-japonicus
#18
Kai Zhang, Hu Hou, Lin Bu, Bafang Li, Changhu Xue, Zhe Peng, Shiwei Su
The sensory texture of sea cucumber (Apostichopus japonicus) was dramatically affected by heat treatment. In this study, sea cucumbers were heated under different thermal conditions (HSC), and divided into five groups (HSC-80, HSC-90, HSC-100, HSC-110, and HSC-120) according to the heating temperature (from 80 to 120 °C). The changes in texture, moisture, gel structure, and biochemical parameters of the HSC were investigated. With increasing heating time (from 10 to 80 min), the hardness and gel structure changed slightly, and the water activity decreased as the proportion of T21 increased by 133...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28284150/effects-of-waterborne-cadmium-on-energy-metabolism-in-the-tropical-sea-cucumber-stichopus-horrens-and-a-comparison-of-tissue-specific-cadmium-accumulation-with-the-temperate-sea-cucumber-australostichopus-mollis
#19
Hannah Charan-Dixon, Sally Gaw, Sharyn J Goldstien, Chris N Glover
The sea cucumber Stichopus horrens is an important component of near-shore ecosystems, and in the Kingdom of Tonga it also comprises an important commercial and subsistence fishery. To assess the sensitivity of this species to the toxic trace metal cadmium (Cd), adult S. horrens were exposed for 96h to an environmental (15µgL(-1)) or effect (765µgL(-1)) concentration of waterborne Cd. The respiratory tree and intestine accumulated higher concentrations of Cd than the muscle and body wall, but there were no effects of Cd on tissue ions (sodium, potassium, magnesium, calcium)...
March 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28279766/structural-characterization-of-immunostimulating-protein-sulfated-fucan-complex-extracted-from-the-body-wall-of-a-sea-cucumber-stichopus-japonicus
#20
Rong-An Cao, Utoomporn Surayot, SangGuan You
The water soluble protein-sulfated fucan (PSF) complex isolated from the body wall of Stichopus japonicus was fractionated using an anion-exchange chromatography to obtain four purified fractions (F1, F2, F3, and F4) and to investigate their structural characteristics and immuno-enhancing activities. The crude PSF and fractions mostly consisted of neutral sugars, proteins and sulfates in various proportions. Fucose was their major monosaccharide unit with small portion of mannose, glucose and galactose. The molecular weight (Mw) of the crude PSF and fractions ranged from 323...
June 2017: International Journal of Biological Macromolecules
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