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https://www.readbyqxmd.com/read/28108745/leukocyte-esterase-as-a-biomarker-in-the-diagnosis-of-periprosthetic-joint-infection
#1
Chi Wang, Rui Li, Qi Wang, Jinyan Duan, Chengbin Wang
BACKGROUND Total joint arthroplasty (TJA) has been one of the most rewarding interventions for treating patients suffering from joint disorders. However, periprosthetic joint infection (PJI) is a serious complication that frequently accompanies TJA. Our study aimed to investigate the application of the leukocyte esterase (LE) strip in the diagnosis of PJI. MATERIAL AND METHODS From October 2014 to July 2015, 72 patients who had undergone joint puncture after arthroplasty in our hospital were enrolled in this trial...
January 21, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28108338/dietary-zinc-promotes-immuno-biochemical-plasticity-and-protects-fish-against-multiple-stresses
#2
Neeraj Kumar, K K Krishnani, Paritosh Kumar, Ashish Kumar Jha, Sanjay Kumar Gupta, N P Singh
The abiotic and biotic stress is an episode that effect on regulatory, neuron, endocrine and immune systems of animals including fish. The stress creates stimulatory and suppressive of immune system resulting in increases the incidence of infection. In view of these points, we have conducted an experiment to mitigate the stress through a nutritional approach through Zinc (Zn) supplementation in Pangasius hypophthalmus (initial weight-3.65 ± 0.75 g). Three isocaloric and isonitrogenous diets with graded levels of zinc 0, 10 and 20 mg/kg were prepared and fed to seven different groups with each in triplicate...
January 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28108006/3-4-dihydroxycinnamic-acid-stimulates-immune-system-function-by-modifying-the-humoral-antibody-response-an-in-vivo-study
#3
M Ishwarya, R T Narendhirakannan
The immunomodulatory property of 3,4-Dihydroxy-cinnamic acid (DCA) was studied under the normal and cyclophosphamide induced immunosuppressive conditions in animal models. The immunomodulatory activity was evaluated by studying the haematological parameters, humoral antibody, based on the plaque forming cell count, the bone marrow cellularity, the α-esterase's producing active cells, delayed type hypersensitive assay, phagocytic index assays. The chemopreventive effect of DCA was determined by cyclophosphamide induced immunosuppression in animals...
January 11, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28106035/esterase-mutation-is-a-mechanism-of-resistance-to-antimalarial-compounds
#4
Eva S Istvan, Jeremy P Mallari, Victoria C Corey, Neekesh V Dharia, Garland R Marshall, Elizabeth A Winzeler, Daniel E Goldberg
Pepstatin is a potent peptidyl inhibitor of various malarial aspartic proteases, and also has parasiticidal activity. Activity of pepstatin against cultured Plasmodium falciparum is highly variable depending on the commercial source. Here we identify a minor contaminant (pepstatin butyl ester) as the active anti-parasitic principle. We synthesize a series of derivatives and characterize an analogue (pepstatin hexyl ester) with low nanomolar activity. By selecting resistant parasite mutants, we find that a parasite esterase, PfPARE (P...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28105534/construction-of-a-novel-lipolytic-fusion-biocatalyst-gdest-lip-for-industrial-application
#5
Renata Gudiukaite, Mikas Sadauskas, Audrius Gegeckas, Vilius Malunavicius, Donaldas Citavicius
The gene encoding esterase (GDEst-95) from Geobacillus sp. 95 was cloned and sequenced. The resulting open reading frame of 1497 nucleotides encoded a protein with calculated molecular weight of 54.7 kDa, which was classified as a carboxylesterase with an identity of 93-97% to carboxylesterases from Geobacillus bacteria. This esterase can be grouped into family VII of bacterial lipolytic enzymes, was active at broad pH (7-12) and temperature (5-85 °C) range and displayed maximum activity toward short acyl chain p-nitrophenyl (p-NP) esters...
January 19, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28104900/extremozymes-a-potential-source-for-industrial-applications
#6
REVIEW
Kelly Dumorné, David Camacho Córdova, Marcia Astorga-Eló, Prabhaharan Renganathan
Extremophilic microorganisms have established a diversity of molecular strategies in order to survive in extreme conditions. Biocatalysts isolated by these organisms are termed extremozymes, possess extraordinary properties are salt allowance thermostability and cold adaptivity. Extremozymes are very resistant in extreme conditions due to their great solidity and they propose new opportunities for biocatalysis and biotransformations, also for the development of the economy and new line of research through their application...
January 20, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28103691/sudemycin-k-a-synthetic-antitumor-splicing-inhibitor-variant-with-improved-activity-and-versatile-chemistry
#7
Kamil Makowski, Luisa Vigevani, Fernando Albericio, Juan Valcárcel, Mercedes Álvarez
Important links exist between the process of pre-mRNA splicing and cancer, as illustrated by the frequent mutation of splicing factors in tumors and the emergence of various families of antitumor drugs that target components of the splicing machinery, notably SF3B1, a protein subunit of spliceosomal U2 small nuclear ribonucleoprotein particle (snRNP). Sudemycins are synthetic compounds that harbor a pharmacophore common to various classes of splicing inhibitors. Here, we describe the synthesis and functional characterization of novel sudemycin analogues that functionally probe key chemical groups within this pharmacophore...
January 20, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28102191/a-broadly-protective-therapeutic-antibody-against-influenza-b-virus-with-two-mechanisms-of-action
#8
Ning Chai, Lee R Swem, Summer Park, Gerald Nakamura, Nancy Chiang, Alberto Estevez, Rina Fong, Lynn Kamen, Elviza Kho, Mike Reichelt, Zhonghua Lin, Henry Chiu, Elizabeth Skippington, Zora Modrusan, Jeremy Stinson, Min Xu, Patrick Lupardus, Claudio Ciferri, Man-Wah Tan
Influenza B virus (IBV) causes annual influenza epidemics around the world. Here we use an in vivo plasmablast enrichment technique to isolate a human monoclonal antibody, 46B8 that neutralizes all IBVs tested in vitro and protects mice against lethal challenge of all IBVs tested when administered 72 h post infection. 46B8 demonstrates a superior therapeutic benefit over Tamiflu and has an additive antiviral effect in combination with Tamiflu. 46B8 binds to a conserved epitope in the vestigial esterase domain of hemagglutinin (HA) and blocks HA-mediated membrane fusion...
January 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28101247/clinical-characteristics-of-infant-neuroblastoma-and-a-summary-of-treatment-outcome
#9
Yi Zhang, Dongsheng Huang, Weiling Zhang, Suoqin Tang, Tao Han, Xia Zhu, Aiping Liu, Tian Zhi
Neuroblastoma (NB) is the most common malignant solid tumor in the peripheral nervous system in infants and young children, with a high degree of malignancy. The clinical characteristics and prognosis of NB in infants are unique. The present study retrospectively analyzed the prognosis of infant NB cases that underwent different treatments. In total, 16 infant NB cases (10 male and 6 female) who were treated between February 2007 and August 2013 in Beijing Tongren Hospital (Beijing, China), were enrolled in the study...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28100079/a-novel-proton-transfer-salt-of-2-amino-6-sulfamoylbenzothiazole-and-its-metal-complexes-the-evaluation-of-their-inhibition-effects-on-human-cytosolic-carbonic-anhydrases
#10
Zeynep Alkan Alkaya, Halil İlkimen, Cengiz Yenikaya, Yasemin Kaygısız, Metin Bülbül, Tuncay Tunç, Musa Sarı
A novel proton transfer compound (SMHABT)(+)(HDPC)(-) (1) obtained from 2-amino-6-sulfamoylbenzothiazole (SMABT) and 2,6-pyridinedicarboxylic acid (H2DPC) and its Fe(III), Co(II), Ni(II) complexes (2-4), and Fe(II) complex of SMABT (5) have been prepared and characterized by spectroscopic techniques. Additionally, single crystal X-ray diffraction techniques were applied to complexes (2-4). All complexes (2-4) have distorted octahedral conformations and the structure of 5 might be proposed as octahedral according to spectral and analytical results...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28097692/structural-role-of-a-conserved-active-site-cis-proline-in-the-thermotoga-maritima-acetyl-esterase-from-the-carbohydrate-esterase-family-7
#11
Mrityunjay K Singh, Narayanan Manoj
A conserved cis proline residue located in the active site of Thermotoga maritima acetyl esterase (TmAcE) from the carbohydrate esterase family 7 (CE7) has been substituted by alanine. The residue was known to play a crucial role in determining the catalytic properties of the enzyme. To elucidate the structural role of the residue, the crystal structure of the Pro228Ala variant (TmAcEP228A ) was determined at 2.1 Å resolution. The replacement does not affect the overall secondary, tertiary and quaternary structures and moderately decreases the thermal stability...
January 18, 2017: Proteins
https://www.readbyqxmd.com/read/28091548/genome-analysis-of-a-zygomycete-fungus-choanephora-cucurbitarum-elucidates-necrotrophic-features-including-bacterial-genes-related-to-plant-colonization
#12
Byoungnam Min, Ji-Hyun Park, Hongjae Park, Hyeon-Dong Shin, In-Geol Choi
A zygomycete fungus, Choanephora cucurbitarum is a plant pathogen that causes blossom rot in cucurbits and other plants. Here we report the genome sequence of Choanephora cucurbitarum KUS-F28377 isolated from squash. The assembled genome has a size of 29.1 Mbp and 11,977 protein-coding genes. The genome analysis indicated that C. cucurbitarum may employ a plant pathogenic mechanism similar to that of bacterial plant pathogens. The genome contained 11 genes with a Streptomyces subtilisin inhibitor-like domain, which plays an important role in the defense against plant immunity...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088107/gaas-laser-therapy-reestablishes-the-morphology-of-the-nmj-and-nachrs-after-injury-due-to-bupivacaine
#13
Cristiane Neves Alessi Pissulin, Paula Aiello Tomé de Souza Castro, Flávio Codina, Carina Guidi Pinto, Ivan Jose Vechetti-Junior, Selma Maria Michelin Matheus
BACKGROUND: Local anesthetics are used to relieve pre- and postoperative pain, acting on both sodium channels and nicotinic acetylcholine receptors (nAChR) at the neuromuscular junction (NMJ). Bupivacaine acts as a non-competitive antagonist and has limitations, such as myotoxicity, neurotoxicity, and inflammation. Low-level laser therapy (LLLT) has anti-inflammatory, regenerative, and analgesic effects. The aim of the present study was to evaluate the effects of a gallium arsenide laser (GaAs) on the morphology of the NMJ and nAChRs after application of bupivacaine in the sternomastoid muscle...
December 22, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28086840/evidence-of-multiple-insecticide-resistance-mechanisms-in-anopheles-gambiae-populations-in-bangui-central-african-republic
#14
Marina Lidwine Olé Sangba, Aboubakar Sidick, Renaud Govoetchan, Christian Dide-Agossou, Razaki A Ossè, Martin Akogbeto, Mamadou Ousmane Ndiath
BACKGROUND: Knowledge of insecticide resistance status in the main malaria vectors is an essential component of effective malaria vector control. This study presents the first evaluation of the status of insecticide resistance in Anopheles gambiae populations from Bangui, the Central African Republic. METHODS: Anopheles mosquitoes were reared from larvae collected in seven districts of Bangui between September to November 2014. The World Health Organisation's bioassay susceptibility tests to lambda-cyhalothrin (0...
January 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28078397/optimized-synthesis-of-novel-prenyl-ferulate-performed-by-feruloyl-esterases-from-myceliophthora-thermophila-in-microemulsions
#15
Io Antonopoulou, Laura Leonov, Peter Jütten, Gabriella Cerullo, Vincenza Faraco, Adamantia Papadopoulou, Dimitris Kletsas, Marianna Ralli, Ulrika Rova, Paul Christakopoulos
Five feruloyl esterases (FAEs; EC 3.1.1.73), FaeA1, FaeA2, FaeB1, and FaeB2 from Myceliophthora thermophila C1 and MtFae1a from M. thermophila ATCC 42464, were tested for their ability to catalyze the transesterification of vinyl ferulate (VFA) with prenol in detergentless microemulsions. Reaction conditions were optimized investigating parameters such as the medium composition, the substrate concentration, the enzyme load, the pH, the temperature, and agitation. FaeB2 offered the highest transesterification yield (71...
January 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28077333/molecular-cloning-characterization-and-expression-analysis-of-two-juvenile-hormone-esterase-like-carboxylesterase-cdnas-in-chinese-mitten-crab-eriocheir-sinensis
#16
Yu Xu, Muzi Zhao, Yanfei Deng, Yuanjie Yang, Xuguang Li, Quanping Lu, Jiachun Ge, Jianlin Pan, Zhiqiang Xu
Precise regulation of methyl farnesoate (MF) titer is of prime importance throughout the crustacean life-cycle. Although the synthetic pathway of MF is well-documented, little is known about its degradation and recycling in crustaceans. Juvenile hormone esterase-like (JHE-like) carboxylesterase (CXE) is a key enzyme in MF degradation, thus playing a significant role in regulating the MF titer. We identified and characterized two cDNAs, Es-CXE1 and Es-CXE2, encoding JHE-like CXEs in Chinese mitten crab. Full-length cDNAs of Es-CXE1 and Es-CXE2 encode proteins composed of 584 and 597 amino acids, respectively, both of which contain a typical carboxylesterase domain...
January 8, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28070779/hydrolytic-activity-of-esterase-antibody-complexes-retained-within-gel-capsules-after-complex-isolation
#17
Youji Shimazaki, Rino Miyatsuka
Delipidation in biological samples is important for some diagnostic tests and protein analyses. Lipids in the samples can be hydrolyzed by native esterases (ESs) within gel capsules after ES, and ES-antibody complexes are specifically trapped, extracted, and separated. Acrylamide and agarose gel capsules containing complexes of ES antibody were produced after the complexes were extracted using protein A-immobilized membranes, separated by non-denaturing electrophoresis, and stained by colloidal silver using glucose as a reductant...
January 9, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28069588/diet-quality-determines-lipase-gene-expression-and-lipase-esterase-activity-in-daphnia-pulex
#18
Apostolos-Manuel Koussoroplis, Anke Schwarzenberger, Alexander Wacker
We studied the short- (12 hours) and long-term (144h) response of Daphnia pulex lipases to quality shifts in diets consisting of different mixtures of the green alga Scenedesmus with the cyanobacterium Synechococcus, two species with contrasting lipid compositions. The lipase/esterase activity in both the gut and the body tissues responded fast to the diet shift and increased with higher dietary contributions of Synechococcus When screening the Daphnia genome for TAG lipases, we discovered a large gene-family expansion of these enzymes...
January 9, 2017: Biology Open
https://www.readbyqxmd.com/read/28067776/sensitivity-of-quantitative-signal-detection-in-regards-to-pharmacological-neuroenhancement
#19
Maximilian Gahr, Bernhard J Connemann, Carlos Schönfeldt-Lecuona, René Zeiss
Pharmacological neuroenhancement (PNE) is a form of abuse and has not yet been addressed by methods of pharmacovigilance. In the present study, we tested if quantitative signal detection may be sensitive in regards to PNE. We evaluated the risk of drug abuse and dependence (DAAD) related to substances that are known to be used for PNE and divided this group into agents with (methylphenidate) and without a known abuse potential outside the field of PNE (atomoxetine, modafinil, acetylcholine esterase inhibitors, and memantine)...
January 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28062919/screening-purification-and-characterization-of-a-novel-organic-solvent-tolerant-esterase-lip2-from-monascus-purpureus-strain-m7
#20
Li-Jing Kang, Zi-Tong Meng, Chen Hu, Yan Zhang, Hai-Lun Guo, Qing Li, Mu Li
Organic solvent-tolerant esterases are proven to be excellent biocatalysts in chemical and pharmaceutical industries. A novel organic solvent-tolerant esterase gene, lip2, was isolated from filamentous fungi Monascus purpureus M7. The sequence analysis suggested that lip2 has a conserved "GDSL" motif near the active center. The multiple-sequence alignment and phylogenetic analysis revealed that Lip2 displayed two unique amino-acid sequence motifs that clearly separate it from any other previously described lipase family...
January 6, 2017: Extremophiles: Life Under Extreme Conditions
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