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https://www.readbyqxmd.com/read/29350293/diversity-and-enzymatic-potentialities-of-bacillus-sp-strains-isolated-from-a-polluted-freshwater-ecosystem-in-cuba
#1
Jeny Adina Larrea-Murrell, Marcia Maria Rojas-Badia, Ivette García-Soto, Beatriz Romeu-Alvarez, Tristano Bacchetti, Annika Gillis, Ana Karina Boltes-Espinola, Mayra Heydrich-Perez, Daysi Lugo-Moya, Jacques Mahillon
Genotypic and phenotypic characterization of Bacillus spp. from polluted freshwater has been poorly addressed. The objective of this research was to determine the diversity and enzymatic potentialities of Bacillus spp. strains isolated from the Almendares River. Bacilli strains from a polluted river were characterized by considering the production of extracellular enzymes using API ZYM. 14 strains were selected and identified using 16S rRNA, gyrB and aroE genes. Genotypic diversity of the Bacillus spp. strains was evaluated using pulsed field gel electrophoresis...
January 19, 2018: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29349547/heterologous-expression-of-two-aspergillus-niger-feruloyl-esterases-in-trichoderma-reesei-for-the-production-of-ferulic-acid-from-wheat-bran
#2
Liangkun Long, Haoyuan Zhao, Dafan Ding, Meijuan Xu, Shaojun Ding
Feruloyl esterase (FAE)-encoding genes AnfaeA and AnfaeB were isolated from Aspergillus niger 0913. For overexpression of the two genes in Trichoderma reesei, constitutive and inductive expression plasmids were constructed based on parental plasmid pAg1-H3. The constructed plasmids contained AnfaeA or AnfaeB gene under the control of glyceraldehyde-3-phosphate dehydrogenase A gene (gpdA) promoter (from A. nidulans) or cellobiohydrolases I (cbh I) gene promoter (from T. reesei), and cbh I terminator from T. reesei...
January 18, 2018: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29342177/a-new-fluorescent-dye-accumulation-assay-for-parallel-measurements-of-the-abcg2-abcb1-and-abcc1-multidrug-transporter-functions
#3
Edit Szabó, Dóra Türk, Ágnes Telbisz, Nóra Kucsma, Tamás Horváth, Gergely Szakács, László Homolya, Balázs Sarkadi, György Várady
ABC multidrug transporters are key players in cancer multidrug resistance and in general xenobiotic elimination, thus their functional assays provide important tools for research and diagnostic applications. In this study we have examined the potential interactions of three key human ABC multidrug transporters with PhenGreen diacetate (PGD), a cell permeable fluorescent metal ion indicator. The non-fluorescent, hydrophobic PGD rapidly enters the cells and, after cleavage by cellular esterases, in the absence of quenching metal ions, PhenGreen (PG) becomes highly fluorescent...
2018: PloS One
https://www.readbyqxmd.com/read/29341588/human-neuraminidase-isoenzymes-show-variable-activities-for-9-o-acetyl-sialoside-substrates
#4
Carmanah D Hunter, Neha Khanna, Michele R Richards, Reza Rezaei Darestani, Chunxia Zou, John S Klassen, Christopher W Cairo
Recognition of terminal sialic acids is central to many cellular processes, and structural modification of sialic acid can disrupt these interactions. A prominent, naturally occuring, modification of sialic acid is 9-O-acetylation (9-O-Ac). Study of this modification through generation and analysis of 9-O-Ac sialosides is challenging due to the lability of the acetate group. Fundamental questions regarding the role of 9-O-Ac sialic acids remain unanswered, including what effect it may have on recognition and hydrolysis by the human neuraminidase enzymes (hNEU)...
January 17, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29339564/accuracy-of-the-urinalysis-for-urinary-tract-infections-in-febrile-infants-60-days-and-younger
#5
Leah Tzimenatos, Prashant Mahajan, Peter S Dayan, Melissa Vitale, James G Linakis, Stephen Blumberg, Dominic Borgialli, Richard M Ruddy, John Van Buren, Octavio Ramilo, Nathan Kuppermann
OBJECTIVES: Reports of the test accuracy of the urinalysis for diagnosing urinary tract infections (UTIs) in young febrile infants have been variable. We evaluated the test characteristics of the urinalysis for diagnosing UTIs, with and without associated bacteremia, in young febrile infants. METHODS: We performed a planned secondary analysis of data from a prospective study of febrile infants ≤60 days old at 26 emergency departments in the Pediatric Emergency Care Applied Research Network...
January 16, 2018: Pediatrics
https://www.readbyqxmd.com/read/29338933/physiological-based-pharmacokinetic-modeling-to-estimate-in%C3%A2-vivo-ki-of-ketoconazole-on-renal-p-gp-using-human-drug-drug-interaction-study-result-of-fesoterodine-and-ketoconazole
#6
Masayo Oishi, Yuma Takano, Yutaka Torita, Bimal Malhotra, Koji Chiba
This study was conducted to estimate in vivo inhibition constant (Ki) of ketoconazole on renal P-glycoprotein (P-gp) using human drug-drug interaction (DDI) study result of fesoterodine and ketoconazole. Fesoterodine is a prodrug which is extensively hydrolyzed by non-specific esterases to the active metabolite 5-hydroxymethyl tolterodine (5-HMT). 5-HMT is then further metabolized via Cytochrome P450 (CYP) 2D6 and CYP3A4. It is reported that 5-HMT is a substrate of P-gp whereas fesoterodine is not. Renal clearance of 5-HMT is approximately two-times greater than renal glomerular filtration rate...
November 15, 2017: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/29338201/self-assembly-of-spider-silk-fusion-proteins-comprising-enzymatic-and-fluorescence-activity
#7
Martin Humenik, Madeleine Mohrand, Thomas Scheibel
The recombinant spider silk protein eADF4(C16) was genetically fused either with esterase 2 (EST2) or green fluorescent protein (GFP). The fusions EST-eADF4(C16) and GFP-eADF4(C16) were spectroscopically investigated and showed native structures of EST and GFP. The structural integrity was confirmed by the enzymatic activity of EST and the fluorescence of GFP. The spider silk moiety retained its intrinsically unstructured conformation in solution and the self-assembly into either nanofibrils or nanoparticles could be controlled by the concentration of phosphate...
January 16, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29332864/associations-of-periparturient-plasma-biochemical-parameters-endometrial-leukocyte-esterase-and-myeloperoxidase-and-bacterial-detection-with-clinical-and-subclinical-endometritis-in-postpartum-dairy-cows
#8
Sayed Ahmad Nazhat, Go Kitahara, Nobutoshi Kozuka, Shogo Mido, Mohammed Sadawy, Hossam El-Sheikh Ali, Takeshi Osawa
This study was aimed at demonstrating associations between peripheral biochemical parameters, endometrial leukocyte esterase (LE) and myeloperoxidase (MPO), and bacterial detection with the degree of endometrial inflammation, and determining the best time postpartum for diagnosing endometritis to predict subsequent fertility in dairy cows. Plasma albumin, blood urea nitrogen (BUN), total cholesterol (T-cho), NEFA, and BHBA concentrations were analyzed in 43 Holstein cows at 3, 5 and 7 weeks postpartum (W3, W5 and W7)...
January 12, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29332745/a-critical-overview-of-the-current-myofascial-pain-literature-january-2018
#9
REVIEW
Jan Dommerholt, Todd Hooks, Li-Wei Chou, Michelle Finnegan
The majority of papers included in the quarterly review discuss various aspects of dry needling (DN), which continues to be of interest to researchers and clinicians. A study by Liu et al. is the first paper to examine the effects of DN of acetylcholine, esterase and receptors. The study provides support for the integrated trigger point hypothesis and for DN. A paper by Hightower and colleagues found an intriguing link between low magnesium levels in the drink water supply, vitamin D, and myofascial pain, cancer, tendon ruptures, and colon polyps...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332272/comparative-study-of-selenium-and-selenium-nanoparticles-with-reference-to-acute-toxicity-biochemical-attributes-and-histopathological-response-in-fish
#10
Neeraj Kumar, Kishore Kumar Krishnani, Narendra Pratap Singh
Recent studies have demonstrated that selenium (Se) and selenium nanoparticles (Se-NPs) exhibited toxicity at a higher concentration. The lethal concentration of Se and Se-NPs was estimated as 5.29 and 3.97 mg/L at 96 h in Pangasius hypophthalmus. However, the effect of different definite concentration of Se (4.5, 5.0, 5.5, and 6.0 mg/L) and Se-NPs (2.5, 3.0, 3.5, and 4.0 mg/L) was decided for acute experiment. Selenium and Se-NPs alter the biochemical attributes such as anti-oxidative status [catalase (CAT), superoxide dismutase (SOD), and glutathione-S-transferase (GST) activities], neurotransmitter enzyme, cellular metabolic enzymes, stress marker, and histopathology of P...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29332217/a-novel-glucuronoyl-esterase-from-aspergillus-fumigatus-the-role-of-conserved-lys-residue-in-the-preference-for-4-o-methyl-glucuronoyl-esters
#11
Hung Hiep Huynh, Nozomi Ishii, Ichiro Matsuo, Manabu Arioka
Cellulose in plant cell walls is mainly covered by hemicellulose and lignin, and thus efficient removal of these components is thought to be a key step in the optimal utilization of lignocellulose. The recently discovered carbohydrate esterase (CE) 15 family of glucuronoyl esterases (GEs) which cleave the linkages between the free carboxyl group of D-glucuronic acid in hemicellulose and the benzyl groups in lignin residues could contribute to this process. Herein, we report the identification, functional expression, and enzymatic characterization of a GE, AfGE, from the filamentous fungus Aspergillus fumigatus...
January 14, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29330648/cloning-expression-and-characterization-of-the-esterase-estut1-from-ureibacillus-thermosphaericus-which-belongs-to-a-new-lipase-family-xviii
#12
Yuliya V Samoylova, Ksenia N Sorokina, Margarita V Romanenko, Valentin N Parmon
A new esterase gene from thermophilic bacteria Ureibacillus thermosphaericus was cloned into the pET32b vector and expressed in Escherichia coli BL21(DE3). Alignment of the estUT1 amino acid sequence revealed the presence of a novel canonical pentapeptide (GVSLG) and 41-47% identity to the closest family of the bacterial lipases XIII. Thus the esterase estUT1 from U. thermosphaericus was assigned as a member of the novel family XVIII. It also showed a strong activity toward short-chain esters (C2-C8), with the highest activity for C2...
January 12, 2018: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/29321492/quantification-of-silver-nanoparticle-toxicity-to-algae-in-soil-via-photosynthetic-and-flow-cytometric-analyses
#13
Sun-Hwa Nam, Jin Il Kwak, Youn-Joo An
Soil algae, which have received attention for their use in a novel bioassay to evaluate soil toxicity, expand the range of terrestrial test species. However, there is no information regarding the toxicity of nanomaterials to soil algae. Thus, we evaluated the effects of silver nanoparticles (0-50 mg AgNPs/kg dry weight soil) on the soil alga Chlamydomonas reinhardtii after six days, and assessed changes in biomass, photosynthetic activity, cellular morphology, membrane permeability, esterase activity, and oxidative stress...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317643/multiple-mutations-and-overexpression-of-the-mdae7-carboxylesterase-gene-associated-with-male-linked-malathion-resistance-in-housefly-musca-domestica-diptera-muscidae
#14
Yi Zhang, Jing Li, Zhuo Ma, Chao Shan, Xiwu Gao
Two unique housefly strains, MSS and N-MRS, were selected and used to clarify mechanisms of sex-associated malathion resistance in the housefly, Musca domestica. Compared with the lab-susceptible CSS strain, susceptible females and resistant males were observed in the malathion-susceptible MSS strain, while the malathion-resistant near-isogenic line, N-MRS, achieved similar resistance level between genders. Significant synergistic effect of the esterase-inhibitor DEF on resistant houseflies pointed to the important involvement of esterase in this specific malathion resistance...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316335/exposure-response-model-of-subcutaneous-c1-inhibitor-concentrate-to-estimate-the-risk-of-attacks-in-patients-with-hereditary-angioedema
#15
Ying Zhang, Michael A Tortorici, Dipti Pawaskar, Ingo Pragst, Thomas Machnig, Matthew Hutmacher, Bruce Zuraw, Marco Cicardi, Timothy Craig, Hilary Longhurst, Jagdev Sidhu
Subcutaneous C1-inhibitor (HAEGARDA, CSL Behring), is a US Food and Drug Administration (FDA)-approved, highly concentrated formulation of a plasma-derived C1-esterase inhibitor (C1-INH), which, in the phase III Clinical Studies for Optimal Management in Preventing Angioedema with Low-Volume Subcutaneous C1-inhibitor Replacement Therapy (COMPACT) trial, reduced the incidence of hereditary angioedema (HAE) attacks when given prophylactically. Data from the COMPACT trial were used to develop a repeated time-to-event model to characterize the timing and frequency of HAE attacks as a function of C1-INH activity, and then develop an exposure-response model to assess the relationship between C1-INH functional activity levels (C1-INH(f)) and the risk of an attack...
January 9, 2018: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/29314301/acetoxymethyl-am-concept-for-intracellular-administration-of-carbon-monoxide-with-mn-co-3-based-photocorms
#16
Matthias Westerhausen, Patrick Hoffmann, Clara Neumann, Helmar Görls, Michael Schmitt, Jürgen Popp, Ute Neugebauer, Ralf Mede
Targeted administration of carbon monoxide with CO releasing molecules (CORMs) inside of cells proved to be very challenging. Consequently, there are only very few reports on intracellular uptake of CORMs requiring high extracellular CORM loading because an equilibrium between extra- and intracellular concentrations can be assumed. Here we present a strategy for a targeted intracellular administration of manganese(I)-based CORMs that are altered inside of cells to trap these complexes. Thereafter, carbon monoxide can be liberated by irradiation (photoCORMs)...
January 4, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29313693/poloxamer-407-tpgs-mixed-micelles-as-promising-carriers-for-cyclosporine-ocular-delivery
#17
Maria Aurora Grimaudo, Silvia Pescina, Cristina Padula, Patrizia Santi, Angel Concheiro, Carmen Alvarez-Lorenzo, Sara Nicoli
Cyclosporine is an immunosuppressant agent approved for the treatment of dry eye disease and used off-label for other ocular pathologies. Its formulation and ocular bioavailability is a real challenge due to the large molecular weight (1.2 kDa), high lipophilicity and low water solubility. The aim of the work was to develop an aqueous micellar formulation for an efficient cyclosporine delivery to the ocular tissues, using a water soluble derivative of vitamin E (TPGS: d-alpha tocopheryl polyethylene glycol 1000 succinate) and a poloxamer (poloxamer 407) as excipients...
January 9, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29310704/mapping-insecticide-resistance-in-anopheles-gambiae-s-l-from-c%C3%A3-te-d-ivoire
#18
Soromane Camara, Alphonsine A Koffi, Ludovic P Ahoua Alou, Kouakou Koffi, Jean-Paul K Kabran, Aboubacar Koné, Mathieu F Koffi, Raphaël N'Guessan, Cédric Pennetier
BACKGROUND: Insecticide resistance in malaria vectors is an increasing threat to vector control tools currently deployed in endemic countries. Resistance management must be an integral part of National Malaria Control Programmes' (NMCPs) next strategic plans to alleviate the risk of control failure. This obviously will require a clear database on insecticide resistance to support the development of such a plan. The present work gathers original data on insecticide resistance between 2009 and 2015 across Côte d'Ivoire in West Africa...
January 8, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29310464/annals-express-unwanted-road-to-anemia-in-transthyretin-familial-amyloid-polyneuropathy-may-continue-irrespective-of-tafamidis-treatment
#19
Tokunori Ikeda, Teruaki Masuda, Mitsuharu Ueda, Taro Yamashita, Yohei Misumi, Satoru Shinriki, Yukio Ando
BACKGROUND: This retrospective longitudinal study was performed to determine whether tafamidis treatment leads to improvements in commonly used blood data for transthyretin familial amyloid polyneuropathy (TTR-FAP). METHODS: Commonly used blood data (complete blood count [including a hemogram], total protein, albumin, blood urea nitrogen, creatinine, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, lactate dehydrogenase, γ-glutamyl transpeptidase, total bilirubin [T-Bil], creatine kinase, choline esterase, high density lipoprotein cholesterol, low density lipoprotein cholesterol, estimated glomerular filtration rate [eGFR], serum amyloid A protein, TTR, hemoglobin A1c, free triiodothyronine [FT3], and free thyroxine [FT4]) were investigated in 33 TTR-FAP patients...
January 1, 2018: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/29310306/the-importance-of-an-efficient-extraction-protocol-for-the-use-of-fish-muscle-cholinesterases-as-biomarkers
#20
Renato Matos Lopes, Adriana L A Bezerra, Rachel A Hauser-Davis, Manildo Marcião de Oliveira, João B Salles, Vera L F Cunha Bastos, Jayme Cunha Bastos
Esterase activity found in muscle extracts is useful to evaluate harmful effects of anticholinesterase pollutants. Yet, most procedures applied in the extraction of fish muscle esterases in order to investigate their activity as a biomarker of environmental exposure comprise the homogenization of muscle tissue in low-salt solutions, followed by centrifugation to separate the supernatant as the enzyme source. However, acetylcholinesterase (AChE), the main target in these monitoring efforts, is a membrane-bound protein and is only present in muscle extracts if homogenization is carried out using chaotropic high-salt solutions...
March 1, 2018: Talanta
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