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Ping-Han Huang, Ting-Yi Huang, Pei-Si Cai, Li-Kwan Chang
: Yin Yang 1 (YY1) is a multifunctional zinc-finger transcription factor that regulates many key cellular processes. In this study, we report the cloning of YY1 from shrimp, Litopenaeus vannamei, (LvYY1). The study shows that LvYY1 is ubiquitously expressed in shrimp tissues, and knockdown of LvYY1 expression by dsRNA injection in WSSV-infected shrimp reduced both mRNA levels of the WSSV immediate-early gene, ie1, as well as overall copy numbers of the WSSV genome. The cumulative mortality of infected shrimp also declined with LvYY1 dsRNA injection...
January 11, 2017: Journal of Virology
Chaozheng Li, Haoyang Li, Bang Xiao, Yonggui Chen, Sheng Wang, Kai Lǚ, Bin Yin, Sedong Li, Jianguo He
Thioester-containing proteins (TEPs) are present in a wide range of species from deuterostomes to protostomes and are thought to be involved in innate immunity. In the current study, a TEP gene homologous to insect TEPs (iTEP) from the crustacean Litopenaeus vannamei, named LvTEP1, is cloned and functionally characterized. The open reading frame (ORF) of LvTEP1 is 4383 bp in length, encoding a polypeptide of 1460 amino acids with a calculated molecular weight of 161.1 kDa LvTEP1, which is most similar to other TEPs from insects, contains some conserved sequence features, including a N-terminal signal peptide, a canonical thioester (TE) motif, and a C-terminal distinctive cysteine signature...
January 6, 2017: Developmental and Comparative Immunology
Zehui Yu, Yi Geng, Anming Huang, Kaiyu Wang, Xiaoli Huang, Defang Chen, Yangping Ou, Jun Wang
A novel p38 MAPK gene from S. paramamosain was cloned and characterized by rapid amplification of cDNA ends (RACE) technology. S. paramamosain p38 (Sp-p38) MAPK gene consists of an open reading frame of 1095 bp encoding a 365-amino-acid protein, which showed close phylogenetic relationship to Litopenaeus vannamei p38 MAPK. The tissue distribution patterns showed that Sp-p38 MAPK was widely expressed in all examined tissues, with the highest expression in hemocytes and intestines. The expression levels of Sp-p38 MAPK in hemocytes was up-regulated post-stimulation, which reached the peak at 6 h and 12h after bacteria (S...
January 5, 2017: Journal of Invertebrate Pathology
Prabir Kumar Kulabhusan, Jyutika M Rajwade, Vimal Sugumar, Gani Taju, A S Sahul Hameed, Kishore M Paknikar
BACKGROUND: White spot disease (WSD), a major threat to sustainable aquaculture worldwide, is caused by White spot syndrome virus (WSSV). The diagnosis of WSD relies heavily on molecular detection of the virus by one-step PCR. These procedures are neither field-usable nor rapid enough considering the speed at which the virus spreads. Thus, development of a rapid, reliable and field-usable diagnostic method for the detection of WSSV infection is imperative to prevent huge economic losses...
2017: PloS One
Ji-Dong Xu, Hai-Shan Jiang, Tian-Di Wei, Ke-Yi Zhang, Xian-Wei Wang, Xiao-Fan Zhao, Jin-Xing Wang
: Many types of small GTPases are widely expressed in eukaryotes and have different functions. As a crucial member of the Rho GTPase family, Cdc42 serves a number of functions, such as regulating cell growth, migration and cell movement. Several RNA viruses employ Cdc42 hijacking tactics in their target cell entry processes. However, the function of Cdc42 in shrimp antiviral immunity is not clear. In this study, we identified a Cdc42 gene in the kuruma shrimp Marsupenaeus japonicus and named it MjCdc42...
December 28, 2016: Journal of Virology
Ming-Chong Yang, Xiu-Zhen Shi, Hui-Ting Yang, Jie-Jie Sun, Ling Xu, Xian-Wei Wang, Xiao-Fan Zhao, Jin-Xing Wang
Scavenger receptors are an important class of pattern recognition receptors that play several important roles in host defense against pathogens. The class C scavenger receptors (SRCs) have only been identified in a few invertebrates, and their role in the immune response against viruses is seldom studied. In this study, we firstly identified an SRC from kuruma shrimp, Marsupenaeus japonicus, designated MjSRC, which was significantly upregulated after white spot syndrome virus (WSSV) challenge at the mRNA and protein levels in hemocytes...
December 2016: PLoS Pathogens
Youhou Xu, Yucong Huang, Shuanghu Cai
The interleukin-1 receptor-associated kinase-1 (IRAK-1) is an important adapter protein which links downstream of MyD88, and involved in the complex composed of MyD88 and TRAF6 to activate TLRs signaling pathway. In this study, an IRAK-1 homolog (FpIRAK-1) was cloned from the red tail shrimp Fenneropenaeus penicillatus. The ORF of FpIRAK-1 consisted of 2874 bp encoding a protein of 957 amino acids which contains a death domain (DD) and a catalytic domain of serine/threonine kinases (STKc). Homology analysis revealed that the predicted amino acid sequence of FpIRAK-1 shared 71% similarities with IRAK-1 of Litopenaeus vannamei...
December 24, 2016: Fish & Shellfish Immunology
Fang Li, Meiling Gao, Limei Xu, Feng Yang
Three white spot syndrome virus (WSSV) isolates of different virulence were identified in our previous study, the high-virulent strain WSSV-CN01, the moderate-virulent strain WSSV-CN02 and the low-virulent strain WSSV-CN03. In this study, the genomes of these three WSSV isolates were sequenced, annotated and compared. The genome sizes for WSSV-CN01, WSSV-CN02, and WSSV-CN03 are 309,286, 294,261, and 284,148 bp, bearing 177, 164, and 154 putative protein-coding genes, respectively. The genomic variations including insertions, deletions, and substitutions were investigated...
December 24, 2016: Virus Genes
Kien-Cuong Pham, Hoa Thi Tuyet Tran, Cuong Van Doan, Phuoc Hong Le, Anh Thi Van Nguyen, Hoa Anh Nguyen, Huynh Anh Hong, Simon M Cutting, Tuan-Nghia Phan
In this study, Bacillus subtilis spores expressing a chimeric protein, CotB-VP28, was used as a probiotic vaccine to protect black tiger shrimps (Penaeus monodon) against White Spot Syndrome virus (WSSV) infection. Oral administration of pellets coated with CotB-VP28 spores (at >1 x 10(9) cfu g(-1) pellet) to shrimps induced immune-relating phenoloxydase activity (PO) in shrimps after 14 days of feeding (prior challenge) and at day 3 post challenge (1.26 and 1.70 fold increase, respectively). A 75% protection rate was obtained by continuous feeding of the spore coated pellets at >1 x 10(9) cfu g(-1) for 14 days prior to WSSV challenge and during all the post-challenge period...
December 19, 2016: Letters in Applied Microbiology
Xiaoming Pan, Yanfang Zhang, Xuejiao Sha, Jing Wang, Jing Li, Ping Dong, Xingguo Liang
White spot syndrome virus (WSSV) is a major threat to shrimp farming industry and so far there's no effective therapeutic way to it, thus early diagnostic of WSSV is of great importance. However, at the early stage of infection the extremely low-abundance of WSSV DNA challenged the detection sensitivity and accuracy of PCR. To effectively detect low-abundance of WSSV, here we developed a pre-amplification PCR (pre-amp PCR) method to amplify trace amounts of WSSV DNA from massive background genomic DNA. Combining with normal specific PCR, ten copies of target WSSV gene were detected from ~10¹⁰ magnitude of backgrounds...
December 14, 2016: Journal of Microbiology and Biotechnology
Thanachai Methatham, Pakpoom Boonchuen, Phattarunda Jaree, Anchalee Tassanakajon, Kunlaya Somboonwiwat
The anti-lipopolysaccharide factor isoform 3 (ALFPm3), the antimicrobial peptide from Penaeus monodon, possesses antibacterial and antiviral activities. Although the mechanism of action of ALFPm3 against bacteria has been revealed but its antiviral mechanism is still unclear. To further study how the ALFPm3 exhibits antiviral activity against the enveloped virus, white spot syndrome virus (WSSV), the ALFPm3-interacting proteins from WSSV were sought and identified five ALFPm3-interacting proteins, WSSV186, WSSV189, WSSV395, WSSV458, and WSSV471...
December 2, 2016: Developmental and Comparative Immunology
Karla Juarez-Moreno, Claudio Humberto Mejía-Ruiz, Fernando Díaz, Horacio Reyna-Verdugo, Ana Denisse Re, Edgar F Vazquez-Felix, Edna Sánchez-Castrejón, Josué D Mota-Morales, Alexey Pestryakov, Nina Bogdanchikova
White spot syndrome virus (WSSV) is highly lethal and contagious in shrimps; its outbreaks causes an economic crisis for aquaculture. Several attempts have been made to treat this disease; however, to date, there is no effective cure. Because of their antimicrobial activities, silver nanoparticles (AgNPs) are the most studied nanomaterial. Although the antiviral properties of AgNPs have been studied, their antiviral effect against viral infection in aquaculture has not been reported. The AgNPs tested herein are coated with polyvinylpyrrolidone (PVP) and possess multiple international certifications for their use in veterinary and human applications...
February 2017: Chemosphere
Ornchuma Itsathitphaisarn, Siripong Thitamadee, Wattana Weerachatyanukul, Kallaya Sritunyalucksana
Viral pathogens pose a primary threat to global shrimp aquaculture. Despite the urgent industry need for them, practical anti-viral control methods are unavailable due, in part, to lack of an adaptive immune response in crustaceans that renders conventional vaccination methods ineffective. One currently studied method of high interest for protecting shrimp against viral infection relies on the post-transcriptional gene silencing mechanism called RNA interference (RNAi) that is induced by gene-specific constructs of double stranded RNA (dsRNA)...
November 17, 2016: Journal of Invertebrate Pathology
Meng-Ru Zhao, Chuang Meng, Xiao-Lu Xie, Cheng-Hua Li, Hai-Peng Liu
White spot syndrome virus (WSSV) is one of the most prevalent and widespread viruses in both shrimp and crayfish aquaculture. MicroRNAs (miRNAs) are crucial post-transcriptional regulators and play critical roles in cell differentiation and proliferation, apoptosis, signal transduction and immunity. In this study, miRNA expression profiles were identified via deep sequencing in red claw crayfish Cherax quadricarinatus haematopoietic tissue (Hpt) cell cultures infected with WSSV at both early (i.e., 1 hpi) and late (i...
December 2016: Fish & Shellfish Immunology
J S Zhang, Z J Li, G L Wen, Y L Wang, L Luo, H J Zhang, H B Dong
An in-situ experiment was conducted to investigate the effect of tropical storm on the white spot syndrome virus (WSSV) loads in Litopenaeus vannamei rearing ponds. White spot syndrome virus loads, heterotrophic bacteria, Vibrio and water quality (including temperature, dissolved oxygen (DO), salinity, pH, NH4-N, and NO2-N) were continually monitored through one tropical storm. The WSSV loads decreased when tropical storm made landfall, and substantially increased when typhoon passed. The variation of WSSV loads was correlated with DO, temperature, heterotrophic bacteria count, and ammonia-N concentrations...
2016: Iranian journal of veterinary research
Jinling Feng, Xin Huang, Min Jin, Yi Zhang, Tingting Li, Kaimin Hui, Qian Ren
C-type lectins (CTLs) are pattern-recognition proteins that play an important role in innate immunity of vertebrates and invertebrates. In this study, a lectin cDNA named MrLec was cloned and characterized from giant freshwater prawns (Macrobrachiun rosenbergii). The full-length cDNA of MrLec was 1431 bp, which contained an open reading frame of 1041 bp that encoded a protein with 346 amino acids. MrLec was found to contain a typical signal peptide of 18 amino acids and a single carbohydrate-recognition domain with 121 amino acids...
December 2016: Fish & Shellfish Immunology
Yu-Yuan Chen, Suwaree Kitikiew, Su-Tuen Yeh, Jiann-Chu Chen
White shrimp Litopenaeus vannamei receiving fucoidan at 2, 6, and 10 μg g(-1) after 0-144 h or 0-120 h were examined for immune parameters (haemograms, phenoloxidase activity, respiratory burst, and superoxide dismutase activity), proliferation of haemocyte in the haematopoietic tissue (HPT), gene expression, and phagocytic activity and clearance efficiency to Vibrio alginolyticus. Immune parameters and mitotic index of HPT increased after 3-24 h, reached their maxima after 48-72 h, and returned to background values after 144 h...
December 2016: Fish & Shellfish Immunology
Defu Yao, Lingwei Ruan, Huasong Lu, Hong Shi, Xun Xu
STATs are a family of transcription factors that regulate a cascade of cellular processes including cell growth, differentiation, apoptosis and immune responses. However, they are usually targeted by viruses to assist infection. In this study, we identified that white spot syndrome virus (WSSV) immediate-early protein IE1 interacted with Litopenaeus vannamei STAT (LvSTAT) and thereby led to its phosphorylation activation. In addition, we demonstrated that LvSTAT could bind to the promoters of the viral immediate-early genes wsv051 and ie1 through STAT-binding motifs in vitro and vivo, allowing the enhancement of their promoters' activities...
December 2016: Fish & Shellfish Immunology
Thanunthon Bowornsakulwong, Walaiporn Charoensapsri, Triwit Rattanarojpong, Pongsak Khunrae
WSSV134 or VP36A protein of white spot syndrome virus was previously reported to be able to reduce apoptosis in Sf-9 cells transfected with caspase of Penaeus monodon (PmCasp). The protein was therefore believed to have a role in supporting the survival of WSSV inside the host cells during infection. However, the anti-apoptosis activity of WSSV134 involved in the inhibition of PmCasp is still unclear. In this study, we produced a recombinant WSSV134 (rWSSV134) and tested for its ability to inhibit PmCasp in vitro...
October 15, 2016: Protein Expression and Purification
Ana Claudia Sánchez-Ortiz, Carlos Angulo, Antonio Luna-González, Píndaro Álvarez-Ruiz, José Manuel Mazón-Suástegui, Ángel Isidro Campa-Córdova
The widespread overuse of antibiotics in aquaculture has led to the emergence of antibiotic-resistance shrimp pathogens, the negative impact on shrimp gut microbiota, and the presence of antimicrobial residues in aquaculture products, with negative consequences on human health. Alternatively, probiotics have positive effects on immunological responses and productive performance of aquatic animals. In this study, three probiotic bacteria, (Bacillus licheniformis MAt32, B. subtilis MAt43 and B. subtilis subsp...
December 2016: Fish & Shellfish Immunology
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