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https://www.readbyqxmd.com/read/29594557/aptamer-based-voltammetric-determination-of-ampicillin-using-a-single-stranded-dna-binding-protein-and-dna-functionalized-gold-nanoparticles
#1
Jun Wang, Kui Ma, Huanshun Yin, Yunlei Zhou, Shiyun Ai
An aptamer based method is described for the electrochemical determination of ampicillin. It is based on the use of DNA aptamer, DNA functionalized gold nanoparticles (DNA-AuNPs), and single-stranded DNA binding protein (ssDNA-BP). When the aptamer hybridizes with the target DNA on the AuNPs, the ssDNA-BP is captured on the electrode surface via its specific interaction with ss-DNA. This results in a decreased electrochemical signal of the redox probe Fe(CN)6 3- which is measured best at a voltage of 0.188 mV (vs...
December 20, 2017: Mikrochimica Acta
https://www.readbyqxmd.com/read/29487457/thermodynamic-compatibility-and-interactions-between-speckled-sugar-bean-protein-and-xanthan-gum-for-production-of-multilayer-o-w-emulsion
#2
Nazanin Fatemeh Rahmati, Arash Koocheki, Mehdi Varidi, Rassoul Kadkhodaee
Thermodynamic compatibility and probable interactions between Speckled Sugar been protein (SSBP) and xanthan gum for production of multilayer O/W emulsion (30% oil) were investigated. Different interactions were observed between SSBP and xanthan at different pH (3-7) including electrostatic interactions and hydrogen bonding. These interactions were predominant at pH 3. When low xanthan gum concentration (0.1%) was used, phase separation and complex coacervation observed at this pH (negative effect of interactions)...
March 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29182730/genetic-variation-in-slc8a1-gene-involved-in-blood-pressure-responses-to-acute-salt-loading
#3
Kuo Liu, Zheng Liu, Han Qi, Bin Liu, Jingjing Wu, Yezhou Liu, Jie Zhang, Han Cao, Yuxiang Yan, Yan He, Ling Zhang
BACKGROUND: Salt sensitivity of blood pressure (SSBP) increases the risk of cardiovascular complications, and the heritability of SSBP is about 50% in Chinese population. However, studies identifying genes involved in BP responses to acute sodium loading and diuresis shrinkage are still limited. METHOD: A total of 342 essential hypertensives from Beijing were recruited in our study. A modified Sullivan's acute oral saline load and diuresis shrinkage test was conducted to each individual...
November 22, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28985281/striatin-gene-polymorphic-variants-are-associated-with-salt-sensitive-blood-pressure-in-normotensives-and-hypertensives
#4
Tina Gupta, Molly Connors, Jia Wei Tan, Worapaka Manosroi, Noha Ahmed, Pei Yee Ting, Amanda E Garza, Jose R Romero, Paul N Hopkins, Jonathan S Williams, Gordon H Williams
BACKGROUND: Understanding the interactions between genetics, sodium (Na+) intake, and blood pressure (BP) will help overcome the lack of individual specificity in our current treatment of hypertension. This study had 3 goals: expand on the relationship between striatin gene (STRN) status and salt-sensitivity of BP (SSBP); evaluate the status of Na+ and volume regulating systems by striatin risk allele status; evaluate potential SSBP mechanisms. METHODS: We assessed the relationship between STRN status in humans (HyperPATH cohort) and SSBP and on volume regulated systems in humans and a striatin knockout mouse (STRN+/-)...
December 8, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28938457/the-association-of-estrogen-receptor-%C3%AE-gene-variation-with-salt-sensitive-blood-pressure
#5
Worapaka Manosroi, Jia Wei Tan, Chevon M Rariy, Bei Sun, Mark O Goodarzi, Aditi R Saxena, Jonathan S Williams, Luminita H Pojoga, Jessica Lasky-Su, Jinrui Cui, Xiuqing Guo, Kent D Taylor, Yii-Der I Chen, Anny H Xiang, Willa A Hsueh, Leslie J Raffel, Thomas A Buchanan, Jerome I Rotter, Gordon H Williams, Ellen W Seely
Context: Hypertension in young women is uncommon compared with young men and older women. Estrogen appears to protect most women against hypertension, with incidence increasing after menopause. Because some premenopausal women develop hypertension, estrogen may play a different role in these women. Genetic variations in the estrogen receptor (ER) are associated with cardiovascular disease. ER-β, encoded by ESR2, is the ER predominantly expressed in vascular smooth muscle. Objective: To determine an association of single nucleotide polymorphisms in ESR2 with salt sensitivity of blood pressure (SSBP) and estrogen status in women...
November 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28874457/correction-for-chenail-et-al-borrelia-burgdorferi-cp32-bpab-modulates-expression-of-the-prophage-nucp-nuclease-and-ssbp-single-stranded-dna-binding-protein
#6
Alicia M Chenail, Brandon L Jutras, Claire A Adams, Logan H Burns, Amy Bowman, Ashutosh Verma, Brian Stevenson
No abstract text is available yet for this article.
October 1, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28482284/expression-of-a-novel-recombinant-cyanate-hydratase-rtl-cyn-in-pichia-pastoris-characteristics-and-applicability-in-the-detoxification-of-cyanate
#7
Bibhuti Ranjan, Santhosh Pillai, Kugenthiren Permaul, Suren Singh
A recombinant Pichia pastoris harbouring the cyanate hydratase gene (rTl-Cyn) from the thermophilic fungus Thermomyces lanuginosus SSBP yielded a high titre of extracellular cyanate hydratase (100±13UmL(-1)) which was ∼10-fold higher than the native fungal strain. The purified rTl-Cyn had a molecular mass of ∼20kDa on SDS-PAGE, with Km, Vmax, kcat and kcat/Km values of 0.34mM, 2857.14µmolesmg(-1)min(-1), 2.14×10(4)s(-1) and 6.3 ×10(7)M(-1)s(-1), respectively. Its properties of thermostability, pH stability, and heavy metals insensitivity, make it a suitable candidate for bioremediation in extreme environments...
August 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28459543/recj-5-exonuclease-digestion-of-oligonucleotide-failure-strands-a-green-method-of-trityl-on-purification
#8
Michael Jensen, Ronald Davis
Methods of error filtration and correction post-gene assembly are a major bottleneck in the synthetic biology pipeline. Current oligonucleotide purification strategies, including polyacrylamide gel electrophoresis and high-performance liquid chromatography, are often expensive and labor-intensive, give low mass recovery, and contain hazardous chemicals. To circumvent these limitations, we explored an enzymatic means of oligonucleotide purification using RecJ, which is the only known exonuclease to digest single-stranded DNA (ssDNA) in the 5' to 3' direction...
May 9, 2017: Biochemistry
https://www.readbyqxmd.com/read/28384593/thermo-acid-stable-phytase-mediated-enhancement-of-bioethanol-production-using-colocasia-esculenta
#9
Melvin Makolomakwa, Adarsh Kumar Puri, Kugen Permaul, Suren Singh
Phytase production by the thermophilic mould Thermomyces lanuginosus SSBP was enhanced 8.56-fold in submerged fermentation, which was further improved in fed-batch cultivations. The protein was purified to homogeneity using ammonium sulphate precipitation, Resource Q anion exchange and Superdex gel-filtration chromatography, with an overall purification of 24.7-fold and a yield of 5.16%. The purified 49kDa protein was optimally active at 55°C and pH 5.0, and was stable between 50 and 90°C from pH 3.0-6.0, with a half-life of 138...
July 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28247929/steady-state-peripheral-blood-provides-cells-with-functional-and-metabolic-characteristics-of-real-hematopoietic-stem-cells
#10
COMPARATIVE STUDY
Antonin Bourdieu, Maryse Avalon, Véronique Lapostolle, Sadek Ismail, Margaux Mombled, Christelle Debeissat, Marianne Guérinet, Pascale Duchez, Jean Chevaleyre, Marija Vlaski-Lafarge, Arnaud Villacreces, Vincent Praloran, Zoran Ivanovic, Philippe Brunet de la Grange
Hematopoietic stem cells (HSCs), which are located in the bone marrow, also circulate in cord and peripheral blood. Despite high availability, HSCs from steady state peripheral blood (SSPB) are little known and not used for research or cell therapy. We thus aimed to characterize and select HSCs from SSPB by a direct approach with a view to delineating their main functional and metabolic properties and the mechanisms responsible for their maintenance. We chose to work on Side Population (SP) cells which are highly enriched in HSCs in mouse, human bone marrow, and cord blood...
January 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27898073/proteomic-analysis-of-the-postsynaptic-density-implicates-synaptic-function-and-energy-pathways-in-bipolar-disorder
#11
COMPARATIVE STUDY
M Föcking, P Dicker, L M Lopez, M Hryniewiecka, K Wynne, J A English, G Cagney, D R Cotter
The postsynaptic density (PSD) contains a complex set of proteins of known relevance to neuropsychiatric disorders such as schizophrenia and bipolar disorder. We enriched for this anatomical structure in the anterior cingulate cortex of 16 bipolar disorder samples and 20 controls from the Stanley Medical Research Institute. Unbiased shotgun proteomics incorporating label-free quantitation was used to identify differentially expressed proteins. Quantitative investigation of the PSD identified 2033 proteins, among which 288 were found to be differentially expressed...
November 29, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27779458/dose-response-effect-of-the-lercanidipine-enalapril-combination-a-pooled-analysis
#12
Damiano Rizzoni
OBJECTIVE: The dose-effect relationship of fixed-dose combinations of anti-hypertensive drugs has been only poorly explored. This pooled analysis investigates the dose-response relationship of fixed-dose lercanidipine + enalapril in patients with mild-to-moderate hypertension. RESEARCH DESIGN AND METHODS: This was an individual patient data analysis of four randomized studies (n = 2340). MAIN OUTCOME MEASURES: The primary efficacy variable was the change from baseline in sitting diastolic blood pressure (SDBP)...
October 2016: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/26867193/identification-of-novel-pathways-in-plant-lectin-induced-cancer-cell-apoptosis
#13
Zheng Shi, Rong Sun, Tian Yu, Rong Liu, Li-Jia Cheng, Jin-Ku Bao, Liang Zou, Yong Tang
Plant lectins have been investigated to elucidate their complicated mechanisms due to their remarkable anticancer activities. Although plant lectins seems promising as a potential anticancer agent for further preclinical and clinical uses, further research is still urgently needed and should include more focus on molecular mechanisms. Herein, a Naïve Bayesian model was developed to predict the protein-protein interaction (PPI), and thus construct the global human PPI network. Moreover, multiple sources of biological data, such as smallest shared biological process (SSBP), domain-domain interaction (DDI), gene co-expression profiles and cross-species interolog mapping were integrated to build the core apoptotic PPI network...
February 8, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/26625192/cardiorespiratory-fitness-body-fatness-and-submaximal-systolic-blood-pressure-among-young-adult-women
#14
Vivek Kumar Prasad, Clemens Drenowatz, Gregory A Hand, Carl J Lavie, Xuemei Sui, Madison Demello, Steven N Blair
OBJECTIVES: We examined the independent and combined associations of cardiorespiratory fitness (CRF), body fat (BF) percentage (BF%), and body mass index (BMI) with submaximal systolic blood pressure (SSBP) among young adult women. MATERIALS AND METHODS: Analyses included a sample of 211 normotensive women with a BMI between 20 and 35 kg/m(2); BF% was calculated using total BF measured from dual X-ray absorptiometry, CRF was assessed using a graded exercise test, and SSBP was measured at each stage...
September 2016: Journal of Women's Health
https://www.readbyqxmd.com/read/26587837/comparative-susceptibility-of-sheep-of-different-origins-breeds-and-prnp-genotypes-to-challenge-with-bovine-spongiform-encephalopathy-and-scrapie
#15
COMPARATIVE STUDY
Fiona Houston, Wilfred Goldmann, James Foster, Lorenzo González, Martin Jeffrey, Nora Hunter
Sheep are natural hosts of the prion disease, scrapie. They are also susceptible to experimental challenge with various scrapie strains and with bovine spongiform encephalopathy (BSE), which affects cattle and has been accidentally transmitted to a range of other species, including man. Incidence and incubation period of clinical disease in sheep following inoculation is controlled by the PRNP gene, which has different alleles defined on the basis of polymorphisms, particularly at codons 136, 154 and 171, although other codons are associated with survival time, and the exact responses of the sheep may be influenced by other breed-related differences...
2015: PloS One
https://www.readbyqxmd.com/read/26507419/the-effect-of-prp-sc-accumulation-on-inflammatory-gene-expression-within-sheep-peripheral-lymphoid-tissue
#16
Anton G Gossner, John Hopkins
Accumulation of the misfolded prion protein, PrP(Sc) in the central nervous system (CNS) is strongly linked to progressive neurodegenerative disease. For many transmissible spongiform encephalopathies (TSEs), peripheral lymphoid tissue is an important site of PrP(Sc) amplification but without gross immunological consequence. Susceptible VRQ homozygous New Zealand Cheviot sheep were infected with SSBP/1 scrapie by inoculation in the drainage area of the prescapular lymph nodes. The earliest time that PrP(Sc) was consistently detected by immunohistology in these nodes was D50 post infection...
December 31, 2015: Veterinary Microbiology
https://www.readbyqxmd.com/read/26462798/chitinase-from-thermomyces-lanuginosus-ssbp-and-its-biotechnological-applications
#17
REVIEW
Faez Iqbal Khan, Krishna Bisetty, Suren Singh, Kugen Permaul, Md Imtaiyaz Hassan
Chitinases are ubiquitous class of extracellular enzymes, which have gained attention in the past few years due to their wide biotechnological applications. The effectiveness of conventional insecticides is increasingly compromised by the occurrence of resistance; thus, chitinase offers a potential alternative to the use of chemical fungicides. The thermostable enzymes from thermophilic microorganisms have numerous industrial, medical, environmental and biotechnological applications due to their high stability for temperature and pH...
November 2015: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/26372317/association-between-cardiorespiratory-fitness-and-submaximal-systolic-blood-pressure-among-young-adult-men-a-reversed-j-curve-pattern-relationship
#18
Vivek K Prasad, Clemens Drenowatz, Gregory A Hand, Carl J Lavie, Xuemei Sui, Madison Demello, Steven N Blair
OBJECTIVES: Exercise blood pressure is a marker of future cardiovascular morbidity and mortality among individuals with or without high resting BP or any other cardiovascular disease (CVD) signs and symptoms at present. The purpose of this study was to evaluate the association between SBP during submaximal exercise and cardiorespiratory fitness (CRF) among young men. Further, we investigated the trend displayed by submaximal SBP (SSBP) across different levels of CRF. METHODS: Graded exercise test (GXT) using a Modified Bruce protocol was performed on 204 men; SSBP was recorded at each stage of the protocol...
November 2015: Journal of Hypertension
https://www.readbyqxmd.com/read/26336893/cloning-expression-and-molecular-dynamics-simulations-of-a-xylosidase-obtained-from-thermomyces-lanuginosus
#19
Vashni Gramany, Faez Iqbal Khan, Algasan Govender, Krishna Bisetty, Suren Singh, Kugenthiren Permaul
The aim of this study was to clone, express, and characterize a β-xylosidase (Tlxyn1) from the thermophilic fungus Thermomyces lanuginosus SSBP in Pichia pastoris GS115 as well as analyze optimal activity and stability using computational and experimental methods. The enzyme was constitutively expressed using the GAP promoter and secreted into the medium due to the alpha-mating factor secretion signal present on the expression vector pBGPI. The 1276 bp gene consists of an open reading frame that does not contain introns...
August 2016: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/26247589/transgenic-mouse-bioassay-evidence-that-rabbits-are-susceptible-to-a-variety-of-prion-isolates
#20
Enric Vidal, Natalia Fernández-Borges, Belén Pintado, Hasier Eraña, Montserrat Ordóñez, Mercedes Márquez, Francesca Chianini, Dolors Fondevila, Manuel A Sánchez-Martín, Olivier Andreoletti, Mark P Dagleish, Martí Pumarola, Joaquín Castilla
Interspecies transmission of prions is a well-established phenomenon, both experimentally and under field conditions. Upon passage through new hosts, prion strains have proven their capacity to change their properties and this is a source of strain diversity which needs to be considered when assessing the potential risks associated with consumption of prion contaminated protein sources. Rabbits were considered for decades to be a prion resistant species until proven otherwise recently. To determine the extent of rabbit susceptibility to prions and to assess the effects of passage of different prion strains through this species a transgenic mouse model overexpressing rabbit PrPC was developed (TgRab)...
August 2015: PLoS Pathogens
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