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Fish & Shellfish Immunology

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https://www.readbyqxmd.com/read/28323214/immunological-interactions-between-piscine-orthoreovirus-and-salmonid-alphavirus-infections-in-atlantic-salmon
#1
Magnus Vikan Røsæg, Morten Lund, Ingvild Berg Nyman, Turhan Markussen, Vidar Aspehaug, Hilde Sindre, Maria Krudtaa Dahle, Espen Rimstad
Heart and skeletal muscle inflammation (HSMI) and pancreas disease (PD) cause substantial losses in Atlantic salmon (Salmo salar) aquaculture. The respective causative agents, Piscine orthoreovirus (PRV) and Salmonid alphavirus (SAV), are widespread and often concurrently present in farmed salmon. An experimental infection in Atlantic salmon was conducted to study the interaction between the two viruses, including the immunological mechanisms involved. The co-infected fish were infected with PRV four or ten weeks before they were infected with SAV...
March 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28323212/recombinant-expression-of-epinephelus-lanceolatus-serum-amyloid-a-elsaa-and-analysis-of-its-macrophage-modulatory-activities
#2
Bor-Chyuan Su, Wen-Chun Lin, Han-Ning Huang, Jyh-Yih Chen
Serum amyloid A (SAA) is an acute-phase protein that plays a crucial role in the inflammatory response. In this study, we identified an SAA homolog from Epinephelus lanceolatus (ElSAA). Molecular characterization revealed that ElSAA contains a fibronectin-like motif that is typical of SAAs. Recombinant ElSAA protein (rElSAA) was produced in E. coli BL21 (DE3) cells and purified as a soluble protein. To analyze its biological activity, mouse Raw264.7 macrophage cells were treated with various concentrations of rElSAA...
March 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28323217/effects-of-algal-toxin-okadaic-acid-on-the-non-specific-immune-and-antioxidant-response-of-bay-scallop-argopecten-irradians
#3
Cheng Chi, Sib Sankar Giri, Jin Woo Jun, Hyoun Joong Kim, Sang Wha Kim, Saekil Yun, Se Chang Park
Okadaic acid (OA) is produced by dinoflagellates during harmful algal blooms and is a diarrhetic shellfish-poisoning (DSP) toxin. This toxin is particularly problematic for bivalves that are cultured for human consumption. This study aimed to reveal the effects of exposure to OA on the non-specific immune responses of bay scallop, Argopecten irradians. Various immunological parameters (superoxide dismutase (SOD), acid phosphatase (ACP), alkaline phosphatase (ALP), lysozyme activities, and total protein level) were assessed in the hemolymph of bay scallops at 3, 6, 12, 24, and 48 h post-exposure (hpe) to different concentrations (50, 100, and 500 nM) of OA...
March 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28323215/identification-and-characterization-of-a-novel-calreticulin-involved-in-the-immune-response-of-the-zhikong-scallop-chlamys-farreri
#4
Guanghua Wang, Zengjie Jiang, Ning Yang, Dongfa Zhu, Min Zhang
Calreticulin (CRT) is a multifunctional calcium-binding chaperone shared among vertebrates and invertebrates. In this study, a novel CRT (CfCRT) was identified in the Zhikong scallop Chlamys farreri by rapid amplification of cDNA ends. The full-length cDNA was composed of 1345 bp, which included a 1158 bp open reading frame, a 25 bp 5'-untranslated region (UTR) and a 162 bp 3'-UTR. The predicted molecular mass of CfCRT was 44.8 kDa. CfCRT contained three highly conserved domains (N-, P- and C-domains) essential to the function of CRT...
March 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28323213/oral-delivery-of-bacillus-subtilis-spores-expressing-cysteine-protease-of-clonorchis-sinensis-to-grass-carp-ctenopharyngodon-idellus-induces-immune-responses-and-has-no-damage-on-liver-and-intestine-function
#5
Zeli Tang, Hengchang Sun, TingJin Chen, Zhipeng Lin, Hongye Jiang, Xinyi Zhou, Cunbin Shi, Houjun Pan, Ouqin Chang, Pengli Ren, Jinyun Yu, Xuerong Li, Jin Xu, Yan Huang, Xinbing Yu
Clonorchis sinensis (C. sinensis) is a fish-borne trematode. Human can be infected by ingestion of C. sinensis metacercariae parasitized in grass carp (Ctenopharyngodon idella). For induction of effective oral immune responses, spores of Bacillus subtilis (B. subtilis) WB600 were utilized as vehicle to delivery CsCP (cysteine protease of C. sinensis) cooperated with CotC (B.s-CotC-CP), one of coat proteins, to the gastrointestinal tract. After routine culture of 8-12 h in LB medium, B. subtilis containing CotC-CsCP was transferred into the sporulation culture medium...
March 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28323216/effects-of-ammonia-n-stress-on-metabolic-and-immune-function-via-the-neuroendocrine-system-in-litopenaeus-vannamei
#6
Yanting Cui, Xianyun Ren, Jian Li, Qianqian Zhai, Yanyan Feng, Yang Xu, Li Ma
The purpose of this study was to evaluate the immunological responses, such as phenoloxidase (PO), antibacterial, and bacteriolytic activities, and metabolic variables, such as oxyhemocyanin, lactate, and glucose levels, of Litopenaeus vannamei exposed to ambient ammonia-N at 0, 2.5, 5, 7.5, and 10 mg/L for 0, 3, 6, 12, 24, and 48 h, and determine the effects of the eyestalk hormone on the metabolic and immune functions of unilateral eyestalk-ablated L. vannamei exposed to ambient ammonia-N at 10 mg/L. The actual concentrations of the control and test solutions were 0...
March 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28315393/tumor-necrosis-factor-receptor-associated-factor-6-traf6-participates-in-peroxinectin-gene-expression-in-fenneropenaeus-penicillatus
#7
Shuanghu Cai, Yucong Huang, Bei Wang, Jichang Jian, Youhou Xu
Tumor necrosis factor receptor-associated factor 6 (TRAF6) is an important cytoplasm signal adaptor that mediates signals activated by tumor necrosis factor receptor (TNFR) superfamily and the Interleukin-1 receptor/Toll-like receptor (IL-1/TLR) superfamily. In the study, the full-length cDNA of a TRAF6 homolog (FpTRAF6) was identified from Fenneropenaeus penicillatus. The full-length cDNA of FpTRAF6 is 2033 bp long, with an open reading frame (ORF) encoding a putative protein of 594 amino acids, including a RING type Zinc finger, two TRAF-type Zinc fingers, and a conserved C-terminal meprin and TRAF homology (MATH) domain...
March 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28315392/dietary-yeast-sterigmatomyces-halophilus-enhances-mucosal-immunity-of-gilthead-seabream-sparus-aurata-l
#8
Martha Reyes-Becerril, Crystal Guluarte, Diana Ceballos-Francisco, Carlos Angulo, M Ángeles Esteban
A yeast was isolated from hypersaline sediments, grown and phylogenetically characterized as Sterigmatomyces halophilus strainN16. The dietary administration of this yeast was studied for its effect on skin mucosal immune and antioxidant status of gilthead seabream (Sparus aurata L.). Fish were fed a commercial diet (control, non-supplemented diet), or the same commercial diet supplemented with 0.55% or 1.1% of yeast for 15 and 30 days. One month after the end of the trial, fish from all treatments were intraperitoneally injected with pathogenic Vibrio parahaemolyticus and further fed with the same diets for one week, after which fish were also sampled...
March 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28302579/the-baff-april-axis-plays-an-important-role-in-virus-induced-peritoneal-responses-in-rainbow-trout
#9
Irene Soleto, Beatriz Abós, Rosario Castro, Lucia González, Carolina Tafalla, Aitor G Granja
IgM(+) B cells have been recently demonstrated to be key regulators of peritoneal inflammation in teleost, as a large number of them occupy the peritoneal cavity after 48 h of antigenic stimulation. Despite this, the number of studies addressing the mechanism through which this cell population expands and differentiates in response to stimuli has been scarcely addressed. Because the BAFF/APRIL axis is known to play a major role in B cell survival and differentiation in mammals, we hypothesized that it could be affected in the peritoneal cavity in response to an inflammatory stimulus...
March 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28302578/effects-of-carbon-sources-and-plant-protein-levels-in-a-biofloc-system-on-growth-performance-and-the-immune-and-antioxidant-status-of-nile-tilapia-oreochromis-niloticus
#10
Abdallah Tageldien Mansour, Maria Ángeles Esteban
The efficacy of different biofloc treatments (BFTs) to compensate for a reduction in dietary protein level under zero-water exchange systems was studied during a 10 weeks experiment, assessing the effect on water quality, growth, immune and antioxidant status of Nile tilapia (Oreochromis niloticus) fingerlings. Six groups were established and fed the same plant-based feed containing 20 or 30% crude protein: two groups in clear water conditions with no added carbon source, two biofloc groups given a wheat milling by-product (WMB) as additional carbon source and two biofloc groups given rice bran (RB)...
March 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28300683/expression-of-hsp70-reveals-significant-differences-between-fin-regeneration-and-inflammation-in-paramisgurnus-dabryanus
#11
Li Li, Linlin Wang, Jingya He, Zhongjie Chang
Hsp70 is the most strongly induced in response to various cellular stresses and a good candidate for investigating its role in tissue injury. We firstly cloned full-length cDNA of hsp70 from Paramisgurnus dabryanus (PdHsp70) by RACE method (GenBank: KP402408). Then regeneration and inflammation of fin were established by amputation and scratch respectively. Quantitative RT-PCR detected the PdHsp70 began to increase rapidly its expression at 1 days post amputation (dpa) and reached the peak at 2 dpa during fin regeneration...
March 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28300682/intestinal-transcriptome-modulation-by-functional-diets-in-rainbow-trout-a-high-throughput-sequencing-appraisal-to-highlight-galt-immunomodulation
#12
Ana Teresa Gonçalves, Valentina Valenzuela-Muñoz, Cristian Gallardo-Escárate
Functional ingredients such as pre- and probiotics are used in aquaculture to improve fish condition, modulating microbiota and promoting a healthy intestinal functioning. They also exert an active effect on the gut associated lymphoid tissue (GALT), stimulating the immune system. However, the molecular underpinnings of pre- and probiotics effect on intestinal mucosa are still unknown. This study investigated the intestinal mucosa transcriptome modulation when fish were fed functional diets and kept at different stocking densities...
March 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28300681/protective-immunity-of-grass-carp-induced-by-dna-vaccine-encoding-capsid-protein-gene-vp7-of-grass-carp-reovirus-using-bacterial-ghost-as-delivery-vehicles
#13
Kai Hao, Xiao-Hui Chen, Xiao-Zhou Qi, Xiao-Bo Yu, En-Qi Du, Fei Ling, Bin Zhu, Gao-Xue Wang
Grass carp reovirus (GCRV) is one of the most pathogenic aquareovirus and can cause lethal hemorrhagic disease in grass carp (Ctenopharyngodon idella). However, management of GCRV infection remains a challenge. Therefore, it is necessary to find effective means for the control of its infection. The uses of bacterial ghost (BG, non-living bacteria) as carriers for DNA delivery have received considerable attentions in veterinary and human vaccines studies. Nevertheless, there is still no report about intramuscular administration of bacterial ghost-based DNA vaccines in fish...
March 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28288912/anti-inflammatory-and-hepatoprotective-effects-of-glycyrrhetinic-acid-on-ccl4-induced-damage-in-precision-cut-liver-slices-from-jian-carp-cyprinus-carpio-var-jian-through-inhibition-of-the-nf-k%C3%A6-pathway
#14
Liping Cao, Weidong Ding, Rui Jia, Jingliang Du, Tao Wang, Chunyun Zhang, Zhengyan Gu, Guojun Yin
In order to evaluate the antioxidant and anti-inflammatory effects of glycyrrhetinic acid (GA) on carbon tetrachloride (CCl4)-induced damage in precision-cut liver slices (PCLS) from Jian carp (Cyprinus carpio. Jian), an acute liver damage model was established in this study. The viability of PCLS, levels of anti-oxidases in liver homogenates, expression of inflammation-related genes including nuclear factor-κB (nf-κB)/c-rel, inducible nitric oxide synthase (inos), interleukin-1β (il-1β), interleukin-6 (il-6) and interleukin-8 (il-8), and protein levels of (nf-κB)/c-rel in liver tissues were measured...
March 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28288911/effects-of-traditional-medical-herbs-minor-bupleurum-decoction-on-the-non-specific-immune-responses-of-white-shrimp-litopenaeus-vannamei
#15
Yu-Sheng Wu, Meng-Chou Lee, Cheng-Ting Huang, Tzu-Chi Kung, Chih-Yang Huang, Fan-Hua Nan
This study is investigating the effect of minor bupleurum decoction (Xiao-Chai-Hu decoction) on the non-specific immune response of white shrimp (Litopenaeus vannamei). To determine prophenoloxidase activity (proPO), reactive oxygen species production (ROS), superoxide anion production (O2(-)), nitric oxide production (NO), phagocytic rate (PR), phagocytic index (PI), superoxide dismutase activity (SOD), total haemocyte count (THC) and differential haemocyte count (DHC). In this experiment, treating with different dosages (0, 0...
March 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28288910/characterization-and-functional-analysis-of-a-novel-c-type-lectin-from-the-swimming-crab-portunus-trituberculatus
#16
Junkai Lu, Zuoben Yu, Changkao Mu, Ronghua Li, Weiwei Song, Chunlin Wang
C-type lectins (CTLs) are a family of calcium-dependent carbohydrate-binding proteins. In the present study, a novel C-type lectin (designated as PtCTL1) was identified and characterized from Portunus trituberculatus. The full-length cDNA of PtCTL1 was of 702 bp, containing a 5' untranslated region (UTR) of 91 bp, a 3' UTR of 110 bp with a poly (A) tail, and an open reading frame (ORF) of 501 bp encoding a polypeptide of 166 amino acids with a putative signaling peptide of 21 amino acids. A C-type lectin carbohydrate-recognition domain (CRD) containing four conserved cysteines was identified in the amino acid sequence of PtCTL1...
March 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28286314/a-norepinephrine-responsive-mirna-directly-promotes-cghsp90aa1-expression-in-oyster-haemocytes-during-desiccation
#17
Hao Chen, Lusheng Xin, Xiaorui Song, Lin Wang, Weilin Wang, Zhaoqun Liu, Huan Zhang, Lingling Wang, Zhi Zhou, Limei Qiu, Linsheng Song
Oyster Crassostrea gigas is one model mollusc inhabiting in the intertidal zone and is frequently stressed by desiccation. The adaptation mechanism of oyster to environmental stress involves multiple levels, and miRNA is one of the most important regulators in post-transcriptional level. In the present study, an oyster norepinephrine-responsive miRNA cgi-miR-365 was proved to contribute to the host adaptation against desiccation by directly promoting the expression of CgHSP90AA1. Briefly, a significant increase of cgi-miR-365 was observed from the first day after aerial exposure and the up-regulation was vigorously repressed when oysters were injected with adrenoceptors antagonists...
March 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28286313/characterization-and-expression-analysis-of-chitinase-genes-chit1-chit2-and-chit3-in-turbot-scophthalmus-maximus-l-following-bacterial-challenge
#18
Chengbin Gao, Xin Cai, Yu Zhang, Baofeng Su, Huanhuan Song, Chao Li
Chitinases are hydrolytic enzymes which have been employed to breakdown chitin coats of pathogenic microorganisms, thereby weaken the defense system of several pathogens and insects. In this regard, we identified the chitinase genes of turbot and characterized their expression patterns in mucosal tissues following Vibrio anguillarum and Streptococcus iniae challenge. In present study, transcripts of three chitinase genes (CHIT1, CHIT2 and CHIT3) were captured, as well as their protein structures and expression patterns following different bacterial infection were characterized...
March 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28284854/effects-of-graded-dietary-levels-of-soy-protein-concentrate-supplemented-with-methionine-and-phosphate-on-the-immune-and-antioxidant-responses-of-gilthead-sea-bream-sparus-aurata-l
#19
Fotini Kokou, Elena Sarropoulou, Efthimia Cotou, Maroudio Kentouri, Maria Alexis, George Rigos
The effects of a dietary soy protein concentrate (SPC) as a fish meal (FM) substitute, on selected innate immune responses, the oxidative status, hepatic and intestinal morphology of gilthead sea bream, Sparus aurata, were evaluated after a three-month feeding trial. Isonitrogenous (45% crude protein) and isoenergetic (23 kJ/g gross energy) diets with 20% (SPC20), 40% (SPC40) and 60% (SPC60) of SPC inclusion, supplemented with methionine and phosphate, were evaluated against a diet containing FM as the sole protein source...
March 8, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28286257/grouper-epinephelus-coioides-tcr-signaling-pathway-was-involved-in-response-against-cryptocaryon-irritans-infection
#20
Ze-Xiang Li, Yan-Wei Li, Shun Xu, Yang Xu, Ze-Quan Mo, Xue-Ming Dan, Xiao-Chun Luo
T cell activation is a complicated process accompanying with the activation of T cell receptor (TCR) signaling pathway, which is not well described in teleost fish. The initiation of this pathway depends on the interaction of membrane TCR co-receptors (e.g. CD4/8, CD3 and CD45) and a series of cytoplasmic protein tyrosine kinases (e.g. Lck, Fyn and ZAP70). Cyptocaryon irritans is a ciliate pathogen of marine fish white spot disease causing huge economic lost in marine aquaculture. This parasite can infect fish gill and skin and is considered to be a good pathogen model for fish gill and skin mucosal immunity...
March 7, 2017: Fish & Shellfish Immunology
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