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https://www.readbyqxmd.com/read/28445094/proteinases-during-early-development-of-the-pacific-whiteleg-shrimp-penaeus-vannamei
#1
Patricia Hernandez-Cortes, Crisalejandra Rivera-Pérez, Fernando García-Carreño, Diana Martínez-Alarcón
During shrimp larval development, changes occur in molecular components. Enzyme activity and mRNA expression of proteinases were assayed in Penaeus vannamei during larval development, which consists of 5 nauplius stages, 3 protozoeal stages, 3 mysis stages, and 12 postlarval stages. Trypsin activity reached a maximum at the beginning of postlarval stages 1 and 2, and significantly decreased in subsequent postlarval stages. Chymotrypsin activity increased at the third protozoeal stage, then significantly decreased in subsequent stages...
February 2017: Biological Bulletin
https://www.readbyqxmd.com/read/28442419/a-sulfated-galactans-supplemented-diet-enhances-the-expression-of-immune-genes-and-protects-against-vibrio-parahaemolyticus-infection-in-shrimp
#2
Tawut Rudtanatip, Nantavadee Boonsri, Somluk Asuvapongpatana, Boonsirm Withyachamnarnkul, Kanokpan Wongprasert
A sulfated galactans (SG) supplemented diet was evaluated for the potential to stimulate immune activity in shrimp Penaeus vannamei (P. vannamei). Shrimp given the SG supplemented diet (0.5, 1 and 2% w/w) for 7 days showed enhanced expression of the downstream signaling mediator of lipopolysaccharide and β-1,3-glucan binding protein (LGBP) and immune related genes including p-NF-κB, IMD, IKKβ and IKKε, antimicrobial peptide PEN-4, proPO-I and II. Following immersion with Vibrio parahaemolyticus (V. parahaemolyticus) for 14 days, the shrimp given the SG supplemented diet (1 and 2% w/w) showed a decrease in bacterial colonies and bacterial toxin gene expression, compared to shrimp given a normal diet, and they reached 50% mortality at day 14...
April 22, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28439089/transcriptome-analysis-on-the-exoskeleton-formation-in-early-developmetal-stages-and-reconstruction-scenario-in-growth-moulting-in-litopenaeus-vannamei
#3
Yi Gao, Jiankai Wei, Jianbo Yuan, Xiaojun Zhang, Fuhua Li, Jianhai Xiang
Exoskeleton construction is an important issue in shrimp. To better understand the molecular mechanism of exoskeleton formation, development and reconstruction, the transcriptome of the entire developmental process in Litopenaeus vannamei, including nine early developmental stages and eight adult-moulting stages, was sequenced and analysed using Illumina RNA-seq technology. A total of 117,539 unigenes were obtained, with 41.2% unigenes predicting the full-length coding sequence. Gene Ontology, Clusters of Orthologous Group (COG), the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis and functional annotation of all unigenes gave a better understanding of the exoskeleton developmental process in L...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438681/immobilized-lignin-peroxidase-from-ganoderma-lucidum-ibl-05-with-improved-dye-decolorization-and-cytotoxicity-reduction-properties
#4
Raheela Shaheen, Muhammad Asgher, Fatima Hussain, Haq Nawaz Bhatti
Use of free microbial enzymes for bioremediation and other industrial applications has several disadvantages like low stability and non-reusability in repeated batch operations. Immobilized enzymes are stable, recoverable and reusable in industrial processes. In this scenario G. lucidum IBL-05 LiP was entrapped in Ca-alginate beads using optimum concentrations of Na-alginate (4%), calcium chloride (0.2M) and glutraldehyde (0.02%). Optimum pH (pH 5) and temperature (55(o)C) for entrapped LiP were improved as compared to free LiP...
April 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28437776/large-scale-seaweed-cultivation-diverges-water-and-sediment-microbial-communities-in-the-coast-of-nan-ao-island-south-china-sea
#5
Xinfei Xie, Zhili He, Xiaojuan Hu, Huaqun Yin, Xueduan Liu, Yufeng Yang
Seaweed cultivation not only provides economy benefits, but also remediates the environment contaminated by mariculture of animals (e.g., fish, shrimps). However, the response of microbial communities to seaweed cultivation is poorly understood. In this study, we analyzed the diversity, composition, and structure of water and sediment microbial communities at a seaweed, Gracilaria lemaneiformis, cultivation zone and a control zone near Nan'ao Island, South China Sea by MiSeq sequencing of 16S rRNA gene amplicons...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28435106/comparative-proteome-analysis-of-the-hepatopancreas-from-the-pacific-white-shrimp-litopenaeus-vannamei-under-long-term-low-salinity-stress
#6
Chang Xu, Erchao Li, Yan Liu, Xiaodan Wang, Jian G Qin, Liqiao Chen
Litopenaeus vannamei is a typical euryhaline decapod model to study the osmoregulation mechanism in crustaceans. The proteomic was undertaken using isobaric tags for relative and absolute quantification together with the reverse phase in high-performance liquid chromatography mass spectrometry to quantitatively identify the proteins differentially expressed in the hepatopancreas under low salinity stress (3psu) compared with the control salinity (25psu). 533 proteins and 84 differentially expressed proteins were identified including 58 proteins with the 1...
April 18, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28434865/allergens-involved-in-the-cross-reactivity-of-aedes-aegypti-with-other-arthropods
#7
Jose Fernando Cantillo, Leonardo Puerta, Sylvie Lafosse-Marin, Jose Luis Subiza, Luis Caraballo, Enrique Fernandez-Caldas
BACKGROUND: Cross-reactivity between Aedes aegypti and mites, cockroaches, and shrimp has been previously suggested, but the involved molecular components have not been fully described. OBJECTIVE: To evaluate the cross-reactivity between A aegypti and other arthropods. METHODS: Thirty-four serum samples from patients with asthma and/or allergic rhinitis were selected, and specific IgE to A aegypti, Dermatophagoides pteronyssinus, Dermatophagoides farinae, Blomia tropicalis, Periplaneta americana...
April 20, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28432348/white-spot-syndrome-virus-vp28-specific-double-stranded-rna-provides-protection-through-a-highly-focused-sirna-population
#8
Pål Nilsen, Marius Karlsen, Kallaya Sritunyalucksana, Siripong Thitamadee
Several studies have demonstrated that injection of double-stranded RNAs (dsRNA) homologous to mRNA for the white spot syndrome virus (WSSV) viral protein 28 (VP28) can induce protection in shrimp against WSSV through RNA interference (RNAi). In comparison to shrimp injected with either PBS or a green fluorescent protein (GFP) nonspecific dsRNA, we obtained nearly complete protection against WSSV infection in shrimp injected with VP28 dsRNA. Upregulation of host genes associated with small RNA silencing was measured 48 hours post treatment in groups injected with dsRNA, and although the VP28-treated group remained moderately upregulated after challenge with WSSV, many-fold higher induction was observed in both control groups reflecting the ongoing viral infection...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432099/acute-hepatopancreatic-necrosis-disease-ahpnd-causing-vibrio-parahaemolyticus-strains-maintain-an-antibacterial-type-vi-secretion-system-with-versatile-effector-repertoires
#9
Peng Li, Lisa N Kinch, Ann Ray, Ankur B Dalia, Qian Cong, Linda M Nunan, Andrew Camilli, Nick V Grishin, Dor Salomon, Kim Orth
Acute hepatopancreatic necrosis disease (AHPND) is a newly emerging shrimp disease that has severely damaged the global shrimp industry. AHPND is caused by toxic strains of Vibrio parahaemolyticus (V. parahaemolyticus) that have acquired a "selfish plasmid" encoding the deadly binary toxins PirA(vp)/PirB(vp) To better understand the repertoire of virulence factors in AHPND-causing V. parahaemolyticus, we conducted a comparative analysis using genome sequences of the clinical strain RIMD2210633, environmental non-AHPND and toxic AHPND isolates of V...
April 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28431013/dna-double-strand-break-repair-in-penaeus-monodon-is-predominantly-dependent-on-homologous-recombination
#10
Shikha Srivastava, Sumedha Dahal, Sharanya J Naidu, Deepika Anand, Vidya Gopalakrishnan, Rajendran Kooloth Valappil, Sathees C Raghavan
DNA double-strand breaks (DSBs) are mostly repaired by nonhomologous end joining (NHEJ) and homologous recombination (HR) in higher eukaryotes. In contrast, HR-mediated DSB repair is the major double-strand break repair pathway in lower order organisms such as bacteria and yeast. Penaeus monodon, commonly known as black tiger shrimp, is one of the economically important crustaceans facing large-scale mortality due to exposure to infectious diseases. The animals can also get exposed to chemical mutagens under the culture conditions as well as in wild...
April 1, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28428061/identification-and-characterization-of-an-interleukin-16-like-gene-from-pacific-white-shrimp-litopenaeus-vannamei
#11
Qianhui Liang, Jiefu Zheng, Hongliang Zuo, Chaozheng Li, Shengwen Niu, Linwei Yang, Muting Yan, Shao-Ping Weng, Jianguo He, Xiaopeng Xu
Interleukins are a group of cytokines that play essential roles in immune regulation. Almost all interleukin genes are only found in vertebrates. In this study, an interleukin-16-like gene (LvIL-16L) was identified from Pacific white shrimp, Litopenaeus vannamei. LvIL-16L was predicted to encode a precursor (pro-LvIL-16L) with 1378 amino acids, sharing similarities with predicted pro-IL-16-like proteins from insects. The C-terminus of pro-LvIL-16L protein contained two PDZ domains homologous to the mature IL-16 cytokine of vertebrates...
April 17, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28422302/recombinant-pira-like-toxin-protects-shrimp-against-challenge-with-vibrio-parahaemolyticus-the-aetiological-agent-of-acute-hepatopancreatic-necrosis-disease
#12
A I Campa-Córdova, A F León-Gallo, A Romero-Maldonado, A C Ibarra-Serrano, S Rosales-Mendoza, I Hirono, C Angulo
No abstract text is available yet for this article.
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28419951/can-fractal-methods-applied-to-video-tracking-detect-the-effects-of-deltamethrin-pesticide-or-mercury-on-the-locomotion-behavior-of-shrimps
#13
Bruno Mendes Tenorio, Eurípedes Alves da Silva Filho, Gentileza Santos Martins Neiva, Valdemiro Amaro da Silva, Fernanda das Chagas Angelo Mendes Tenorio, Themis de Jesus da Silva, Emerson Carlos Soares E Silva, Romildo de Albuquerque Nogueira
Shrimps can accumulate environmental toxicants and suffer behavioral changes. However, methods to quantitatively detect changes in the behavior of these shrimps are still needed. The present study aims to verify whether mathematical and fractal methods applied to video tracking can adequately describe changes in the locomotion behavior of shrimps exposed to low concentrations of toxic chemicals, such as 0.15µgL(-1) deltamethrin pesticide or 10µgL(-1) mercuric chloride. Results showed no change after 1min, 4, 24, and 48h of treatment...
April 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28418080/phototoxic-potential-of-undispersed-and-dispersed-fresh-and-weathered-macondo-crude-oils-to-gulf-of-mexico-marine-organisms
#14
Bryson E Finch, Solmaz Marzooghi, Dominic M Di Toro, William A Stubblefield
Crude oils contain a mixture of hydrocarbons, including phototoxic polycyclic aromatic hydrocarbons (PAHs) that have the ability to absorb ultraviolet (UV) light. Absorption of UV light by PAHs can substantially increase their toxicity to marine organisms. The objective of the present study was to examine the potential for phototoxicity of fresh and naturally weathered Macondo crude oils alone and in combination with the dispersant Corexit 9500 to mysid shrimp (Americamysis bahia), inland silverside (Menidia beryllina), sheepshead minnow (Cyprinodon variegatus), and Gulf killifish (Fundulus grandis)...
April 18, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28417205/an-eclosion-hormone-like-gene-participates-in-the-molting-process-of-palaemonid-shrimp-exopalaemon-carinicauda
#15
Lihong Zhou, Shihao Li, Zhiwei Wang, Fuhua Li, Jianhai Xiang
Molting behavior is an important physiological process related to metamorphosis, growth, and reproduction in crustaceans. Previous studies indicated that the molting process was controlled by 20-hydroxyecdysone (20E) and upstream hormones, peptides, and environmental factors, which regulate 20E function. Eclosion hormone (EH) in insect is a kind of neuropeptide that is regulated by 20E and triggers ecdysis behavior at the end of molting process. However, the function of eclosion hormone gene during the molting process in crustaceans is still largely unknown...
April 18, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28416870/antagonistic-activity-of-thymus-vulgaris-extracts-against-vibrio-species-isolated-from-seafoods
#16
Chigozie Eunice Oramadike, Samuel Temitope Ogunbanwo
This study examined the antibacterial activity of Thymus vulgaris on multiple antibiotic resistant (MAR) Vibrio parahaemolyticus and Vibrio fluvialis isolated from shrimps. The ethanol extract of T. vulgaris antibacterial properties was assessed using the agar diffusion method. Survival of test organisms in shrimp meat using different concentrations of T. vulgaris was done using standard method. The quantitative and qualitative phytochemical tests of T. vulgaris extract were determined. The ethanol extract had antimicrobial activities on the test organisms showing 20...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28416862/biscuits-fortified-with-micro-encapsulated-shrimp-oil-characteristics-and-storage-stability
#17
Sirima Takeungwongtrakul, Soottawat Benjakul
Characteristics and storage stability of biscuits fortified with micro-encapsulated shrimp oil (MSO) were determined. The addition of MSO increased spread ratio, whilst decreased the thickness of biscuit. The highest hardness of biscuit was obtained with addition of 9 or 12% MSO. Biscuit surface showed higher redness and yellowness when MSO was incorporated (p < 0.05). The addition of MSO up to 6% had no adverse effect on biscuit quality and acceptability. When biscuits added with 6% MSO were stored under different illumination conditions (light and dark), lipid oxidation in all samples increased throughout the storage of 12 days...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28416859/effect-of-catechin-and-its-derivatives-on-inhibition-of-polyphenoloxidase-and-melanosis-of-pacific-white-shrimp
#18
Thanasak Sae-Leaw, Soottawat Benjakul, Benjamin K Simpson
This study aimed to investigate the effect of tea catechin (C) and 4 of its derivatives on the Pacific white shrimp PPO inhibition and melanosis during refrigerated storage. Epigallocatechin gallate (EGCG) exhibited the highest inhibition towards PPO, followed by C. Inhibitory activity of all compounds tested was in a dose dependent manner (0.1-2.0 mM). Based on activity staining, EGCG most effectively inhibited PPO. For inhibition kinetic studies, C and epicatechin (EC) showed uncompetitive type, whereas epicatechin gallate (ECG), epigallocatechin (EGC) and EGCG exhibited mixed type inhibition...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28416403/feasibility-of-dsrna-treatment-for-post-clearing-spf-shrimp-stocks-of-newly-discovered-viral-infections-using-laem-singh-virus-lsnv-as-a-model
#19
Vanvimon Saksmerprome, Patai Charoonnart, Timothy W Flegel
Using post-larvae derived from specific pathogen free (SPF) stocks in penaeid shrimp farming has led to a dramatic increase in production. At the same time, new pathogens of farmed shrimp are continually being discovered. Sometimes these pathogens are carried by shrimp and other crustaceans as persistent infections without gross signs of disease. Thus it is that a 5-generation stock of Penaeus monodon SPF for several pathogens was found, post-stock-development, to be persistently-infected with newly-discovered Laem Singh virus (LSNV)...
April 14, 2017: Virus Research
https://www.readbyqxmd.com/read/28416387/differential-regulation-of-the-lipoxygenase-pathway-in-shrimp-hepatopancreases-and-ovaries-during-ovarian-development-in-the-black-tiger-shrimp-penaeus-monodon
#20
Wananit Wimuttisuk, Punsa Tobwor, Pacharawan Deenarn, Chakapong Intaraudom, Thapanee Pruksatrakul, Sutichai Nithithanasilp, Somjai Wongtripop, Suwanchai Phomklad, Panomkorn Chaithongsakul, Vanicha Vichai
Dietary polyunsaturated fatty acids (PUFAs) are critical to the success of ovarian development in marine crustaceans, especially for domesticated species such as the black tiger shrimp Penaeus monodon. These fatty acids are stored in a midgut gland called the hepatopancreas and subsequently serve as an energy source or are incorporated in yolk during ovarian development. PUFAs are known precursors of hydroxy fatty acids, including hydroxyeicosatetraenoic acid and hydroxyeicosapentaenoic acid (HEPE), which are catalyzed by lipoxygenases (LOX)...
April 14, 2017: Biochemical and Biophysical Research Communications
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