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Kellie J Carim, Kyle R Christianson, Kevin M McKelvey, William M Pate, Douglas B Silver, Brett M Johnson, Benjamin T Galloway, Michael K Young, Michael K Schwartz
[This corrects the article DOI: 10.1371/journal.pone.0161664.].
2016: PloS One
Samiha Mhamdi, Naourez Ktari, Sawssen Hajji, Moncef Nasri, Alya Sellami Kamoun
The present study was undertaken to characterize the extracellular thermostable serine alkaline proteases from newly actinomycete strain Micromonospora chaiyaphumensis S103 and to describe their evaluation in commercial detergents and shrimp waste deproteinization. This proteolytic crude extract was active and stable in alkaline solution. It was extremely stable in the pH range of 5.0-12.0. The optimum pH and temperature were 8.0 and 70°C, respectively, using casein as a substrate. The thermoactivity and thermostability of proteases were enhanced by the addition of 5mM Ca(2+)...
October 17, 2016: International Journal of Biological Macromolecules
Fangzhou Yuan, Liangtao Lv, Zhenxing Li, Nasha Mi, Hairong Chen, Hong Lin
Tropomyosin (TM), a myofibrillar protein, is a major allergen in shrimp. The aim of this study was to evaluate the effect of transglutaminase (TGase)-catalyzed glycosylation on the potential allergenicity and conformational structure of TM in Metapenaeus ensis. Results showed that glycosylation of TM induced unfolding of the primary protein structure followed by loss of the secondary structure. Cleavage of certain free amino groups was observed during TGase-catalyzed glycosylation. The glycosylation rate correlated with reaction temperature...
March 15, 2017: Food Chemistry
Eun-Hee Shin, Ji-Hun Shin, You-Won Lee, Seung-Ha Lee, Chun-Feng Xin
Due to mixed use of shrimp in foodstuffs, it is important to distinguish Fenneropenaeus chinensis from other shrimp species, such as Litopenaeus vannamei and Penaeus monodon. For this purpose, we have developed a multiplex PCR method to detect the simultaneous presence of all three species. Universal primers specific to the 16S ribosomal RNA subunit were used to sequence and ascertain the species in the samples. In this study, specific primers were designed to result in a unique PCR product size (143, 260, and 348 bp for L...
October 19, 2016: Journal of AOAC International
Taous Saraoui, Josiane Cornet, Emilie Guillouet, Marie France Pilet, Frédérique Chevalier, Jean-Jacques Joffraud, Françoise Leroi
Tropical shrimp is of considerable economic importance in the world but is highly perishable due to microbial and chemical degradation. Biopreservation is a food preservation technology based on the addition of "positive" bacteria able to kill or prevent the growth of undesirable microorganisms. Two strains of lactic acid bacteria (LAB) have previously been selected for a biopreservation strategy: Lactococcus piscium CNCM I-4031, for its ability to prevent the sensory deterioration of seafood and Carnobacterium divergens V41, which inhibits growth of Listeria monocytogenes...
October 3, 2016: International Journal of Food Microbiology
Xia Lu, Jie Kong, Sheng Luan, Ping Dai, Xianhong Meng, Baoxiang Cao, Kun Luo
In the practical farming of Litopenaeus vannamei, the intensive culture system and environmental pollution usually results in a high concentration of ammonia, which usually brings large detrimental effects to shrimp, such as increasing the susceptibility to pathogens, reducing growth, decreasing osmoregulatory capacity, increasing the molting frequency, and even causing high mortality. However, little information is available on the molecular mechanisms of the detrimental effects of ammonia stress in shrimp...
2016: PloS One
Barjinder Pal Kaur, P Srinivasa Rao
This study aims to investigate the effect of high-pressure processing on the quality of black tiger shrimp using response surface methodology. A central composite rotatable design was applied to evaluate the effects of three processing parameters, namely pressure (300-600 MPa), temperature (30-50 ℃), and time (0-15 min), on the inactivation rate of Staphylococcus aureus and physical properties (color and texture) of shrimp and to optimize the process conditions to achieve maximum bacterial inactivation with minimal changes in quality attributes...
October 6, 2016: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
Mehtab Parveen, Faheem Ahmad, Ali Mohammed Malla, Shaista Azaz, Mahboob Alam, Omer A Basudan, Manuela Ramos Silva, Pedro S Pereira Silva
Phytochemical investigations of the ethanolic extract of leaves of Clutia lanceolata (Family: Euphorbiaceae) resulted in the isolation of four compounds viz. 3,4-dihydroxy-2-methylbenzoic acid (1), 2,2'-dihydroxy-1,1'-binaphthyl (2), 1,3,8-trihydroxy-6-methylanthracene-9,10-dione (3) and 5-hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-1,4,6-trien-3-one (4). Although all the isolated compounds were known but this was the first report from this plant source. Their structures were established on the basis of chemical and physical evidences viz...
October 18, 2016: Natural Products and Bioprospecting
Mei-Mei Gu, Jing-Rong Kong, Di-Huang, Ting Peng, Chen-Ying Xie, Kai-Yuan Yang, Yuan Liu, Wei-Na Wang
Prohibitin2 (PHB2), a potential tumor suppressor protein, plays important roles in inhibition of cell cycle progression, transcriptional regulation, apoptosis and the mitochondrial respiratory chain. To explore its potential roles in crustaceans' immune responses we have identified and characterized LvPHB2, a 891 bp gene encoding a 297 amino acids protein in the shrimp Litopenaeus vannamei. Expression analyses showed that LvPHB2 is expressed in all examined tissues, and largely present in cytoplasm, correlating with its known anti-oxidation function in mitochondria...
October 15, 2016: Developmental and Comparative Immunology
Rafael C Duarte, Martin Stevens, Augusto A V Flores
BACKGROUND: Colour and shape polymorphisms are important features of many species and may allow individuals to exploit a wider array of habitats, including through behavioural differences among morphs. In addition, differences among individuals in behaviour and morphology may reflect different strategies, for example utilising different approaches to camouflage. Hippolyte obliquimanus is a small shrimp species inhabiting different shallow-water vegetated habitats. Populations comprise two main morphs: homogeneous shrimp of variable colour (H) and transparent individuals with coloured stripes (ST)...
October 18, 2016: BMC Evolutionary Biology
Giuseppe Dionisio, Per Kryger, Tove Steenberg
Beauveria bassiana is an entomopathogenic fungus that grows both in vivo and in vitro. In vivo it can colonize live insect hosts, and tissue digestion occurs by secreted hydrolytic exoenzymes. It can also colonize dead insect tissue provided this is free from competing microorganisms. Depending on whether the host is alive or dead the expression (quality/quantity) of the exoenzymes may vary. We have grown several isolates of B. bassiana in shaking flasks for 120 h at 25 °C in order to evaluate the maximal exoenzyme production using two diet regimes...
October 14, 2016: Insects
San-Lang Wang, Hsin-Ting Li, Li-Jie Zhang, Zhi-Hu Lin, Yao-Haur Kuo
The culture supernatant of Paenibacillus sp. TKU036, a bacterium isolated from Taiwanese soils, showed high antioxidant activity (85%) when cultured in a squid pen powder (SPP)-containing medium at 37 °C for three days. Homogentisic acid (2,5-dihydroxyphenylacetic acid, HGA) was isolated and found to be the major antioxidant in the culture supernatant of the SPP-containing medium fermented by Paenibacillus sp. TKU036. Tryptophan was also present in the culture supernatant. The results of high-performance liquid chromatography (HPLC) fingerprinting showed that HGA and tryptophan were produced via fermentation but did not pre-exist in the unfermented SPP-containing medium...
October 12, 2016: Marine Drugs
Lucia Mastrototaro, Gerhard Sponder, Behnam Saremi, Jörg R Aschenbach
Methionine (Met) is a neutral, sulfur-containing, essential amino acid with biological functions in the initiation and prolongation step of protein synthesis, transmethylation reactions, the synthesis of cysteine and cystine, and as a component of antioxidant systems. Its key importance is reflected by the fact that it is usually absorbed from the diet with highest efficiency among all proteinogenic amino acids but may yet not optimally support metabolism and health. As such, crystalline Met supplements are partly used in man and heavily used in production of animal species (poultry, fish, shrimps, pigs and cattle) to provide improved health and performance...
October 17, 2016: IUBMB Life
Christine H Stortini, Denis Chabot, Nancy L Shackell
We have learned much about the impacts of warming on the productivity and distribution of marine organisms, but less about the impact of warming combined with other environmental stressors, including oxygen depletion. Also, the combined impact of multiple environmental stressors requires evaluation at the scales most relevant to resource managers. We use the Gulf of St. Lawrence, Canada, characterized by a large permanently hypoxic zone, as a case study. Species Distribution Models were used to predict the impact of multiple scenarios of warming and oxygen depletion on the local density of three commercially and ecologically important species...
October 18, 2016: Global Change Biology
Xinfeng Liu, Yuyao Guan, Shiliang Cheng, Yidan Huang, Qin Yan, Jun Zhang, Guanjun Huang, Jian Zheng, Tianqiang Liu
Vibrio parahaemolyticus is widely present in brackish water all over the world, causing infections in certain aquatic animals. It is also a foodborne pathogen that causes diarrhea in humans. The aim of this study is to develop an immunochromatographic lateral flow assay (LFA) for rapid detection of V. parahaemolyticus in both aquatic products and human feces of diarrheal patients. Two monoclonal antibody (MAb) pairs, GA1a-IC9 and IC9-KB4c, were developed and proven to be highly specific and sensitive to V. parahaemolyticus...
October 15, 2016: Journal of Microbiological Methods
M M Kathleen, L Samuel, C Felecia, E L Reagan, A Kasing, M Lesley, S C Toh
The administration of antimicrobials in aquaculture provides a selective pressure creating a reservoir of multiple resistant bacteria in the cultured fish and shrimps as well as the aquaculture environment. The objective of this study was to determine the extent of antibiotic resistance in aquaculture products and aquaculture's surrounding environment in Sarawak, Malaysian Borneo. Ninety-four identified bacterial isolates constituted of 17 genera were isolated from sediment, water, and cultured organisms (fish and shrimp) in selected aquaculture farms...
2016: International Journal of Microbiology
Shanaz Ghuman, Bhekumthetho Ncube, Jeffrey F Finnie, Lyndy J McGaw, Roger M Coopoosamy, Johannes Van Staden
Medicinal plants used for wound healing and skin diseases are the key to unlocking the doors to combating problematic skin diseases as resistance of pathogens to pharmaceuticals and allopathic management continues to increase. The study aimed at investigating the antimicrobial efficacies, phenolic content, and cytotoxicity effects of 11 medicinal plant extracts commonly used for treating skin conditions and wound healing in traditional medicine within KwaZulu-Natal. Eleven plant species were separated into different plant parts (bulbs, roots, leaves) and extracted with different solvents...
2016: Frontiers in Pharmacology
Bo Young Chung, Yong Se Cho, Hye One Kim, Chun Wook Park
BACKGROUND: The etiology of chronic urticaria (CU) remains unknown in most patients. Possible causes in some cases include food, but the role of allergy to food antigens in patients with CU remains controversial. OBJECTIVE: The aim of this study was to evaluate the association between food allergy and CU. METHODS: Korean patients with CU were assessed for a previous history of food allergy that caused symptoms of CU. Blood samples were taken from 350 patients to measure food allergen-specific IgE...
October 2016: Annals of Dermatology
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...
October 12, 2016: Fish & Shellfish Immunology
Uraipan Saetan, Unitsa Sangket, Panchalika Deachamag, Wilaiwan Chotigeat
The banana shrimp (Fenneropenaeus merguiensis) is one of the most commercially important penaeid species in the world. Its numbers are declining in the wild, leading to a loss of broodstock for farmers of the shrimp and a need for more successful breeding programs. However, the molecular mechanism of the genes involved in this shrimp's ovarian maturation is still unclear. Consequently, we compared transcriptomic profiles of ovarian tissue from females in both the vitellogenic stage and the non-vitellogenic stage...
2016: PloS One
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