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https://www.readbyqxmd.com/read/28732873/macromolecular-properties-and-hypolipidemic-effects-of-four-sulfated-polysaccharides-from-sea-cucumbers
#1
Shan Li, Junhui Li, Zijian Zhi, Chaoyang Wei, Wenjun Wang, Tian Ding, Xingqian Ye, Yaqin Hu, Robert J Linhardt, Shiguo Chen
The present study investigates the relationship between the high-order structure and hypolipidemic activity of four well-defined sulfated fucans from sea cucumber. The chain conformation, determined by a combination of AFM and SEC-MALLS-RI, indicate that fucosylated chondroitin sulfate (fCS) from Pearsonothuria graeffei (fCS-Pg) and Isostichopus badionotus (fCS-Ib), and fucoidan from P.graeffei (fuc-Pg) were assigned as a random coil conformation with polysaccharide chain outstretched, while I. badionotus (fuc-Ib) was assigned as a spherical conformation and exhibited high viscosity...
October 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28732111/characterization-of-metabolic-pathways-and-absorption-of-sea-cucumber-saponins-holothurin-a-and-echinoside-a-in-vitro-and-in-vivo
#2
Shanshan Song, Lingyu Zhang, Jian Cao, Gao Xiang, Peixu Cong, Ping Dong, Zhaojie Li, Changhu Xue, Yong Xue, Yuming Wang
Sea cucumber saponins (SCSs) exhibit a wide spectrum of bioactivities, but their metabolic characteristics are not well elucidated. In this study, the metabolism of holothurin A (HA) and echinoside A (EA), 2 major saponins in sea cucumber, by gut microflora were investigated. First, we conducted an in vitro study, where in the SCSs were incubated with intestinal microflora and the metabolites were detected by high pressure liquid chromatography-high resolution mass spectrometry. We also conducted an in vivo study on rats, where in the intestinal contents, serum, urine, and feces were collected and evaluated after oral administration of SCSs...
July 21, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28729274/genome-sequences-of-two-shewanella-spp-isolated-from-the-gut-of-the-sea-cucumber-apostichopus-japonicus-selenka-1867
#3
Hyun-Hee Hong, Hyunjun Choi, Seongmin Cheon, Hyun-Gwan Lee, Chungoo Park
In this study, we sequenced the genomes of two Shewanella spp., newly isolated from the gut of the sea cucumber Apostichopus japonicus (Selenka, 1867). The whole-genome sequences reported here will expand the repertoire of genomic information for the members of the genus Shewanella and will provide important insights into their roles within microbial communities.
July 20, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28727218/altered-sediment-biota-and-lagoon-habitat-carbonate-dynamics-due-to-sea-cucumber-bioturbation-in-a-high-pco2-environment
#4
Kennedy Wolfe, Francisco Vidal-Ramirez, Sophie Dove, Dione Deaker, Maria Byrne
The effects of global change on biological systems and functioning are already measureable, but how ecological interactions are being altered is poorly understood. Ecosystem resilience is strengthened by ecological functionality, which depends on trophic interactions between key species and resilience generated through biogenic buffering. Climate-driven alterations to coral reef metabolism, structural complexity and biodiversity are well documented, but the feedbacks between ocean change and trophic interactions of non-coral invertebrates are understudied...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28715451/transcriptome-analysis-of-the-sea-cucumber-apostichopus-japonicus-with-variation-in-individual-growth
#5
Lei Gao, Chongbo He, Xiangbo Bao, Meilin Tian, Zhen Ma
The sea cucumber (Apostichopus japonicus) is an economically important aquaculture species in China. However, the serious individual growth variation often caused financial losses to farmers and the genetic mechanisms are poorly understood. In the present study, the extensively analysis at the transcriptome level for individual growth variation in sea cucumber was carried out. A total of 118946 unigenes were assembled from 255861 transcripts, with N50 of 1700. Of all unigenes, about 23% were identified with at least one significant match to known databases...
2017: PloS One
https://www.readbyqxmd.com/read/28709723/synbiotic-dietary-supplement-affects-growth-immune-responses-and-intestinal-microbiota-of-apostichopus-japonicus
#6
Xitao Wang, Yongxin Sun, Lili Wang, Xiaoyu Li, Kunli Qu, Yongping Xu
A feeding experiment was conducted to investigate the effects of dietary administration of synbiotic with Bacillus lincheniformis WS-2 (CGMCC No. 12813) and alginate oligosaccharides (AOS) on the growth, innate immune response, and intestinal microbiota of the sea cucumber Apostichopus japonicus and its resistance to Vibrio infection. Sea cucumbers were given a control diet (non-supplemented), pro diet (basal diet plus 1 × 10(9) cfu (g diet)(-1)B. lincheniformis WS-2), syn diet (basal diet plus 1 × 10(9) cfu (g diet)(-1)B...
July 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28705978/draft-genome-sequences-of-pseudoalteromonas-tetraodonis-csb01kr-and-pseudoalteromonas-lipolytica-csb02kr-isolated-from-the-gut-of-the-sea-cucumber-apostichopus-japonicus
#7
Jihoon Jo, Hyunjun Choi, Sung-Gwon Lee, Jooseong Oh, Hyun-Gwan Lee, Chungoo Park
We present here the complete genome sequences of two newly isolated Pseudoalteromonas tetraodonis and Pseudoalteromonas lipolytica strains, isolated from the gut of the sea cucumber Apostichopus japonicus, to provide a useful means for facilitating the study of antibacterial, bacteriolytic, agarolytic, and algicidal activities of marine Pseudoalteromonas species.
July 13, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28687360/extracellular-matrix-remodeling-and-matrix-metalloproteinases-ajmmp-2-like-and-ajmmp-16-like-characterization-during-intestine-regeneration-of-sea-cucumber-apostichopus-japonicus
#8
Ting Miao, Zixuan Wan, Lina Sun, Xiaoni Li, Lili Xing, Yucen Bai, Fang Wang, Hongsheng Yang
Remodeling of extracellular matrix (ECM) regulated by matrix metalloproteinases (MMPs) is essential for tissue regeneration. In the present study, we used immunohistochemistry (IHC) techniques against ECM components to reveal changes of ECM during intestine regeneration of Apostichopus japonicus. The expression of collagen I and laminin reduced apparently from the eviscerated intestine, while fibronectin exhibited continuous expression in all regeneration stages observed. Meanwhile, we cloned two MMP genes from A...
July 4, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28684750/molecular-ecological-network-analysis-reveals-the-effects-of-probiotics-and-florfenicol-on-intestinal-microbiota-homeostasis-an-example-of-sea-cucumber
#9
Gang Yang, Mo Peng, Xiangli Tian, Shuanglin Dong
Animal gut harbors diverse microbes that play crucial roles in the nutrition uptake, metabolism, and the regulation of host immune responses. The intestinal microbiota homeostasis is critical for health but poorly understood. Probiotics Paracoccus marcusii DB11 and Bacillus cereus G19, and antibiotics florfenicol did not significantly impact species richness and the diversity of intestinal microbiota of sea cucumber, in comparison with those in the control group by high-throughput sequencing. Molecular ecological network analysis indicated that P...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28656569/proximate-composition-and-mineral-contents-in-the-body-wall-of-two-species-of-sea-cucumber-from-oman-sea
#10
Noora Barzkar, Gilan Attaran Fariman, Ali Taheri
The proximate composition and mineral contents of Stichopus horrens and Holothuria arenicola from Chabahar Bay were analyzed and investigated. During the present study, we aimed to demonstrate the nutritive value. The approximate percent composition of moisture, protein, fat, and ash were 92.8, 3.47, 0.4, and 3.33% in S. horrens and 93, 4.4, 0.6, and 2% in H. arenicola, respectively. Atomic absorption spectrophotometry of the ashes indicated the body wall of two species of sea cucumbers contained higher amounts of both macro minerals (92...
June 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28647408/identification-and-expression-characterization-of-wnta-during-intestinal-regeneration-in-the-sea-cucumber-apostichopus-japonicus
#11
Xiaoni Li, Lina Sun, Hongsheng Yang, Libin Zhang, Ting Miao, Lili Xing, Da Huo
Wnt genes encode secreted glycoproteins that act as signaling molecules; these molecules direct cell proliferation, migration, differentiation and survival during animal development, maintenance of homeostasis and regeneration. At present, although the regeneration mechanism in Apostichopus japonicus has been studied, there is a little research on the Wnt signaling pathway in A. japonicus. To understand the potential role of the Wnt signaling pathway in A. japonicus, we cloned and sequenced the WntA gene in A...
August 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28633949/habitat-suitability-index-model-of-the-sea-cucumber-apostichopus-japonicus-selenka-a-case-study-of-shandong-peninsula-china
#12
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
#13
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
#14
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 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
#15
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...
August 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
#16
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...
July 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
#17
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
#18
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
#19
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
#20
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
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