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https://www.readbyqxmd.com/read/28633949/habitat-suitability-index-model-of-the-sea-cucumber-apostichopus-japonicus-selenka-a-case-study-of-shandong-peninsula-china
#1
Zhipeng Zhang, Jian Zhou, Jingjing Song, Qixiang Wang, Hongjun Liu, Xuexi Tang
A habitat suitability index (HSI) model for the sea cucumber Apostichopus japonicus (Selenka) was established in the present study. Based on geographic information systems, the HSI model was used to identify potential sites around the Shandong Peninsula suitable for restoration of immature (<25g) and mature (>25g) A. japonicus. Six habitat factors were used as input variables for the HSI model: sediment classification, water temperature, salinity, water depth, pH and dissolved oxygen. The weighting of each habitat factor was defined through the Delphi method...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28601631/ibt-based-quantitative-proteomics-identifies-potential-regulatory-proteins-involved-in-pigmentation-of-purple-sea-cucumber-apostichopus-japonicus
#2
Lili Xing, Lina Sun, Shilin Liu, Xiaoni Li, Libin Zhang, Hongsheng Yang
Sea cucumbers are an important economic species and exhibit high yield value among aquaculture animals. Purple sea cucumbers are very rare and beautiful and have stable hereditary patterns. In this study, isobaric tags (IBT) were first used to reveal the molecular mechanism of pigmentation in the body wall of the purple sea cucumber. We analyzed the proteomes of purple sea cucumber in early pigmentation stage (Pa), mid pigmentation stage (Pb) and late pigmentation stage (Pc), resulting in the identification of 5580 proteins, including 1099 differentially expressed proteins in Pb: Pa and 339 differentially expressed proteins in Pc: Pb...
June 2, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28598301/aquimarina-rubra-sp-nov-isolated-from-sediment-of-a-sea-cucumber-culture-pond
#3
Ji-Ru Han, Dong-Bo Fang, Hai-Feng Xia, Guan-Jun Chen, Zong-Jun Du
A Gram-stain-negative, non-motile, rod-shaped, red-pigmented, facultatively anaerobic bacterium, designated SS2-9T, was isolated from sediment collected from a sea cucumber culture pond located in Rongcheng, Shandong province, China. Cells of strain SS2-9T were approximately 0.3-0.5 µm in width and 1.5-6.0 µm in length. The strain was able to grow at 10-37 °C, at pH 6.5-8.5 and in the presence of 0.5-6.0 % (w/v) NaCl. It grew optimally at 28 °C and in the presence of 2.0 % (w/v) NaCl. The DNA G+C content was 34...
June 9, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28554836/comparative-study-of-three-phenoloxidases-in-the-sea-cucumber-apostichopus-japonicus
#4
Jingwei Jiang, Zunchun Zhou, Ying Dong, Zhong Chen, Hongjuan Sun, Aifu Yang, Shan Gao, Hesheng Su
In order to preliminarily illustrate the functional differences of phenoloxidases (POs) in Apostichopus japonicus, the full-length cDNAs of two POs (named as AjPOⅡ and AjPOⅢ, respectively) were cloned from the coelomocytes of A. japonicus using 3'- and 5'-rapid amplification of cDNA ends method, and combined with the previously acquired full-length cDNA of a laccase-type PO from A. japonicus (Accession No. KF040052, named as AjPOⅠ), the sequence structure and phylogenic status of POs from A. japonicus (AjPOs) were comparatively analyzed, and the transcriptional expression of AjPOs in different tissues, at different developmental stages and after different bacterial challenges was determined with quantitative real-time PCR method...
May 26, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28553698/megadenus-atrae-n-sp-an-endoparasitic-eulimid-gastropod-mollusca-from-the-black-sea-cucumber-holothuria-atra-jaeger-aspidochirotida-holothuriidae-in-the-indo-west-pacific
#5
Tsuyoshi Takano, Anders Warén, Yasunori Kano
An eulimid gastropod, Megadenus atrae n. sp., endoparasitic in the cloacal chamber of the black sea cucumber Holothuria atra Jaeger is described from Okinawa, Japan, as the fifth species of the genus. Conspecific specimens have also been found from southeast India, northeast Australia and New Caledonia. The generic assignment is justified by the presence of (i) a thick, long proboscis that bears a large fold (pseudopallium) near the base and a collar-like structure at the middle, (ii) a thin, globose shell that is covered by the pseudopallium, and (iii) sexual dimorphism with the female generally larger than the male...
May 28, 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28521524/a-first-glance-into-the-nutritional-properties-of-the-sea-cucumber-parastichopus-regalis-from-the-mediterranean-sea-se-spain
#6
Christina C Roggatz, Mercedes González-Wangüemert, Hugo Pereira, Catarina Vizetto-Duarte, Maria João Rodrigues, Luísa Barreira, Manuela Moreira da Silva, João Varela, Luísa Custódio
This work reports for the first time the nutritional profile, including proximate chemical composition, amino acids, fatty acids and minerals of Parastichopus regalis from the Mediterranean Sea (SE Spain). The studied species had a high moisture content, moderate protein and low lipid levels. The most abundant amino acids were glutamic acid, arginine and tyrosine. Polyunsaturated fatty acids, especially arachidonic acid, dominated the fatty acid profile. Iron, sodium, calcium and zinc were the most abundant mine rals...
May 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28512032/cytotoxic-triterpene-diglycosides-from-the-sea-cucumber-stichopus-horrens
#7
Nguyen Xuan Cuong, Le Thi Vien, Le Hoang, Tran Thi Hong Hanh, Do Thi Thao, Nguyen Van Thanh, Nguyen Hoai Nam, Do Cong Thung, Phan Van Kiem, Chau Van Minh
Using various chromatographic separation techniques, eight triterpene diglycosides (1-8), including four new compounds namely stichorrenosides A-D (1-4), were isolated from a methanol extract of the Vietnamese sea cucumber S. horrens. Their structures were elucidated based on spectroscopic analyses, including HR ESI MS, 1D and 2D NMR. Their in vitro cytotoxic activity against five human cancer cell lines, Hep-G2 (hepatoma cancer), KB (epidermoid carcinoma), LNCaP (prostate cancer), MCF7 (breast cancer), and SK-Mel2 (melanoma), was evaluated using SRB methods...
May 6, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28490052/effects-of-endogenous-cysteine-proteinases-on-structures-of-collagen-fibres-from-dermis-of-sea-cucumber-stichopus-japonicus
#8
Yu-Xin Liu, Da-Yong Zhou, Dong-Dong Ma, Zi-Qiang Liu, Yan-Fei Liu, Liang Song, Xiu-Ping Dong, Dong-Mei Li, Bei-Wei Zhu, Kunihiko Konno, Fereidoon Shahidi
Autolysis of sea cucumber, caused by endogenous enzymes, leads to postharvest quality deterioration of sea cucumber. However, the effects of endogenous proteinases on structures of collagen fibres, the major biologically relevant substrates in the body wall of sea cucumber, are less clear. Collagen fibres were prepared from the dermis of sea cucumber (Stichopus japonicus), and the structural consequences of degradation of the collagen fibres caused by endogenous cysteine proteinases (ECP) from Stichopus japonicus were examined...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28481429/total-synthesis-of-echinoside%C3%A2-a-a-representative-triterpene-glycoside-of-sea-cucumbers
#9
Xiaoping Chen, Xiaofei Shao, Wei Li, Xiaheng Zhang, Biao Yu
Echinoside A, a sulfonylated holostane tetrasaccharide with potent anticancer and antifungal activity, was synthesized in a longest linear sequence of 35 steps and 0.6 % overall yield. The synthetic approach is adaptable to the synthesis of congeners and analogues, as exemplified by the ready synthesis of ds-echinoside A and echinoside B, and thus will facilitate in-depth studies on the promising biological effects of echinoside A. Moreover, the present synthesis demonstrates the feasibility of synthetic access to the characteristic complex triterpene glycosides that occur ubiquitously in sea cucumbers...
May 8, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28460346/cladolosides-i1-i2-j1-k1-k2-and-l1-monosulfated-triterpene-glycosides-with-new-carbohydrate-chains-from-the-sea-cucumber-cladolabes-schmeltzii
#10
Alexandra S Silchenko, Anatoly I Kalinovsky, Sergey A Avilov, Pelageya V Andryjaschenko, Pavel S Dmitrenok, Ekaterina A Chingizova, Igor Yu Dolmatov, Vladimir I Kalinin
Six new monosulfated triterpene glycosides, cladolosides I1 (1), I2 (2), J1 (3), K1 (4), K2 (5) and L1 (6) were isolated from the tropical Indo-West Pacific sea cucumber Cladolabes schmeltzii (Cladolabinae, Sclerodactylidae, Dendrochirotida). Structures of these glycosides were elucidated by 2D NMR spectroscopy and mass spectrometry. Four new types of carbohydrate chains have been found in 1-6. Cladolosides of the groups I and J are characterized by pentasaccharide carbohydrate chains sulfated at a terminal 3-O-methylglucose residue and branched by the position 4 of the first xylose residue, but differing from each other in the lengths of the main and side carbohydrate chains...
April 19, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28460072/exploring-the-structure-of-fucosylated-chondroitin-sulfate-through-bottom-up-nuclear-magnetic-resonance-and-electrospray-ionization-high-resolution-mass-spectrometry-approaches
#11
Gustavo Rc Santos, Ana Co Porto, Paulo Ag Soares, Eduardo Vilanova, Paulo As Mourão
Fucosylated chondroitin sulfate (FCS) from sea cucumbers is composed of a chondroitin sulfate (CS) central core and branches of sulfated fucose. The structure of this complex glycosaminoglycan is usually investigated via nuclear magnetic resonance (NMR) analyses of the intact molecule, ergo through a top-down approach, which often yield spectra with intricate sets of signals. Here we employed a bottom-up approach to analyze the FCSs from the sea cucumbers Isostichopus badionotus and Ludwigothurea grisea from their basic constituents, viz...
July 1, 2017: Glycobiology
https://www.readbyqxmd.com/read/28450116/a-characteristic-chondroitin-sulfate-trisaccharide-unit-with-a-sulfated-fucose-branch-exhibits-neurite-outgrowth-promoting-activity-novel-biological-roles-of-fucosylated-chondroitin-sulfates-isolated-from-the-sea-cucumber-apostichopus-japonicus
#12
Miharu Shida, Tadahisa Mikami, Jun-Ichi Tamura, Hiroshi Kitagawa
Chondroitin sulfate (CS) is a class of sulfated glycosaminoglycan (GAG) chains that consist of repeating disaccharide unit composed of glucuronic acid (GlcA) and N-acetylgalactosamine (GalNAc). CS chains are found throughout the pericellular and extracellular spaces and contribute to the formation of functional microenvironments for numerous biological events. However, their structure-function relations remain to be fully characterized. Here, a fucosylated CS (FCS) was isolated from the body wall of the sea cucumber Apostichopus japonicus...
June 3, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28444138/the-evolution-of-neuropeptide-signalling-insights-from-echinoderms
#13
Dean C Semmens, Maurice R Elphick
Neuropeptides are evolutionarily ancient mediators of neuronal signalling that regulate a wide range of physiological processes and behaviours in animals. Neuropeptide signalling has been investigated extensively in vertebrates and protostomian invertebrates, which include the ecdysozoans Drosophila melanogaster (Phylum Arthropoda) and Caenorhabditis elegans (Phylum Nematoda). However, until recently, an understanding of evolutionary relationships between neuropeptide signalling systems in vertebrates and protostomes has been impaired by a lack of genome/transcriptome sequence data from non-ecdysozoan invertebrates...
April 21, 2017: Briefings in Functional Genomics
https://www.readbyqxmd.com/read/28442678/frondoside-a-from-sea-cucumber-and-nymphaeols-from-okinawa-propolis-natural-anti-cancer-agents-that-selectively-inhibit-pak1-in-vitro
#14
Binh Cao Quan Nguyen, Kazuki Yoshimura, Shigenori Kumazawa, Shinkichi Tawata, Hiroshi Maruta
A sulfated saponin called "Frondoside A" (FRA) from sea cucumber and ingredients from Okinawa propolis (OP) have been previously shown to suppress the PAK1-dependent growth of A549 lung cancer as well as pancreatic cancer cells. However, the precise molecular mechanism underlying their anti-cancer action still remains to be clarified. In this study, for the first time, we found that both FRA and OP directly inhibit PAK1 in vitro in a selective manner (far more effectively than two other oncogenic kinases, LIMK and AKT)...
April 24, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28433155/a-highly-regular-fucosylated-chondroitin-sulfate-from-the-sea-cucumber-massinium-magnum-structure-and-effects-on-coagulation
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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