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https://www.readbyqxmd.com/read/28222372/comparison-of-classical-fenton-nitrilotriacetic-acid-nta-fenton-uv-fenton-uv-photolysis-of-fe-nta-uv-nta-fenton-and-uv-h2o2-for-the-degradation-of-cyclohexanoic-acid
#1
Ying Zhang, Nikolaus Klamerth, Pamela Chelme-Ayala, Mohamed Gamal El-Din
The treatment of a naphthenic acid model compound, cyclohexanoic acid, with classical Fenton, UV-H2O2, UV-Fenton, nitrilotriacetic acid (NTA)-Fenton, UV-NTA-Fenton, and UV photolysis of Fe-NTA processes at pHs 3 and 8 was investigated. At 1.47 mM H2O2, 0.089 mM Fe, and 0.18 mM NTA, the UV-NTA-Fenton process at pH 3 exhibited the highest H2O2 decomposition (100% in 25 min), CHA removal (100% in 12 min) with a rate constant of 0.27 ± 0.025 min(-1), and NTA degradation (100% in 6 min). Due to the formation of H2O2-Fe(III)NTA adduct, the total Fe concentration in the UV-NTA-Fenton system (0...
February 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28216890/evaluate-the-antigenotoxicity-and-anticancer-role-of-%C3%AE-sitosterol-by-determining-oxidative-dna-damage-and-the-expression-of-phosphorylated-mitogen-activated-protein-kinases-c-fos-c-jun-and-endothelial-growth-factor-receptor
#2
Ramalingam Sharmila, Ganapathy Sindhu
BACKGROUND: Plant sterols are the major source of micronutrients and have not shown any obvious side effects in human. β-sitosterol is one of the most prevalent phytosterols which have been recorded in ancient medicinal history for its use in the treatment of many chronic diseases, especially cancer. The modulations of mitogen-activated protein kinases' (MAPKs') play a crucial role in the development of human renal cell carcinoma. OBJECTIVE: The aim of the current study is to evaluate the antigenotoxic and anticancer role of β-sitosterol against renal carcinogen...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216573/a-conjugate-based-on-anti-her2-diaffibody-and-auristatin-e-targets-her2-positive-cancer-cells
#3
Anna M Serwotka-Suszczak, Alicja M Sochaj-Gregorczyk, Jerzy Pieczykolan, Daniel Krowarsch, Filip Jelen, Jacek Otlewski
Antibody-drug conjugates (ADCs) have recently emerged as efficient and selective cancer treatment therapeutics. Currently, alternative forms of drug carriers that can replace monoclonal antibodies are under intensive investigation. Here, a cytotoxic conjugate of an anti-HER2 (Human Epidermal Growth Factor Receptor 2) diaffibody with monomethyl-auristatin E (MMAE) is proposed as a potential anticancer therapeutic. The anti-HER2 diaffibody was based on the ZHER2:4 affibody amino acid sequence. The anti-HER2 diaffibody has been expressed as a His-tagged protein in E...
February 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28215742/identification-of-grass-carp-ctenopharyngodon-idella-xbp1s-as-a-primary-member-in-er-stress
#4
Xiangqin Wang, Yichuan Mi, Bin Zhong, Huiling Mao, Yiqi Wan, Tao Zhang, Haizhou Wang, Chengyu Hu
X-box binding protein 1 (XBP1), a vital basic leucine zipper transcription factor for the related gene transcription in endoplasmic reticulum (ER) stress, belongs to the CREB/ATF family. In mammals, XBP1S is the activated one of XBP1 isoform. In order to study the role of fish XBP1S, we cloned and identified the XBP1S (KU509247) from grass carp (Ctenopharyngodon idella) (named CiXBP1S) by homologous cloning and RACE technique. The full length of CiXBP1S is 1694 bp along with 124 bp of 5' UTR, 418 bp of 3' UTR and the longest open reading frame (1152 bp) encoding a polypeptide of 383 amino acids with a well conserved DNA binding domain (BRLZ domain)...
February 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28204978/characterization-and-cytotoxic-effect-of-aqua-2-2-2-nitrilotriacetato-oxo-vanadium-salts-on-human-osteosarcoma-cells
#5
Aleksandra Tesmar, Dariusz Wyrzykowski, Rafał Kruszyński, Karolina Niska, Iwona Inkielewicz-Stępniak, Joanna Drzeżdżon, Dagmara Jacewicz, Lech Chmurzyński
The use of protonated N-heterocyclic compound, i.e. 2,2'-bipyridinium cation, [bpyH(+)], enabled to obtain the new nitrilotriacetate oxidovanadium(IV) salt of the stoichiometry [bpyH][VO(nta)(H2O)]H2O. The X-ray measurements have revealed that the compound comprises the discrete mononuclear [VO(nta)(H2O)](-) coordination ion that can be rarely found among other known compounds containing nitrilotriacetate oxidovanadium(IV) moieties. The antitumor activity of [bpyH][VO(nta)(H2O)]H2O and its phenanthroline analogue, [phenH][VO(nta)(H2O)](H2O)0...
February 15, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28202756/a-glycosylation-benchmark-profile-for-hiv-1-envelope-glycoprotein-production-based-on-eleven-env-trimers
#6
Eden P Go, Haitao Ding, Shijian Zhang, Rajesh P Ringe, Nathan Nicely, David Hua, Robert T Steinbock, Michael Golabek, James Alin, S Munir Alam, Albert Cupo, Barton F Haynes, John C Kappes, John P Moore, Joseph G Sodroski, Heather Desaire
HIV-1 envelope glycoprotein (Env) glycosylation is important because individual glycans are components of multiple broadly neutralizing antibody epitopes, while shielding other sites that might otherwise be immunogenic. The glycosylation on Env is influenced by a variety of factors, including the genotype of the protein, the cell line used for its expression, and the details of the construct design. Here, we used a mass spectrometry-based approach to map the complete glycosylation profile at every site in multiple HIV-1 Env trimers, accomplishing two goals: 1) We determined which glycosylation sites contain conserved glycan profiles across many trimeric Envs...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28192902/concentration-normalized-electroanalytical-assaying-of-exosomal-markers
#7
Qian Li, George K Tofaris, Jason J Davis
Exosomes are both active in mediating intracellular communication and potentially present a potent cargo of disease biomarkers to an assay. The robust evaluation of exosomal markers could lead to a paradigm shift in clinical analysis and associated care. To date, much of this has been hindered by issues of sample preparation and assay signal-to-noise. We introduce here the use of ultrasensitive electrochemical impedance spectroscopy to quantify both external (tetraspanin) and internal (syntenin) exosome-specific markers...
February 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28177587/continuous-microfluidic-assembly-of-biodegradable-poly-beta-amino-ester-dna-nanoparticles-for-enhanced-gene-delivery
#8
David R Wilson, Arman Mosenia, Mark P Suprenant, Rahul Upadhya, Denis Routkevitch, Randall A Meyer, Alfredo Quinones-Hinojosa, Jordan J Green
Translation of biomaterial-based nanoparticle formulations to the clinic faces significant challenges including efficacy, safety, consistency and scale-up of manufacturing, and stability during long-term storage. Continuous microfluidic fabrication of polymeric nanoparticles has the potential to alleviate the challenges associated with manufacture, while offering a scalable solution for clinical level production. Poly(beta-amino esters) (PBAE)s are a class of biodegradable cationic polymers that self-assemble with anionic plasmid DNA to form polyplex nanoparticles that have been shown to be effective for transfecting cancer cells specifically in vitro and in vivo...
February 8, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28177221/highly-selective-and-repeatable-surface-enhanced-resonance-raman-scattering-detection-for-epinephrine-in-serum-based-on-interface-self-assembled-2d-nanoparticles-arrays
#9
Binbin Zhou, Xiaoyun Li, Xianghu Tang, Pan Li, LiangBao Yang, Jinhuai Liu
Target analyte detection in complex system with high selectivity and repeatability is crucial to analytical technology and science. Here we present a two-dimensional (2D) surface-enhanced resonance Raman scattering (SERRS) platform, which takes advantage of self-assembled of Au nanoparticles (Au NPs) arrays at cyclohexane/water interface, for detecting trace Epinephrine (EP) in the serum. To realize sensitive and selective detection of EP in complex system, Au NPs is modified with -nitriloacetic acid and Fe(NO3)3 to form the Au NP-(Fe-NTA) sensor, as consequence, EP can be rapidly captured by sen-sor on the surface of Au NPs, then delivered at cyclohexane/water interface...
February 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28164534/expression-of-hcv-alternative-reading-frame-protein-core-1-f-in-baculovirus-expression-system-and-its-evaluation-for-assessment-of-specific-anti-core-1-antibody-in-iranian-hcv-infected-patients
#10
Pooneh Rahimi, Rouhollah Vahabpour, Farideh Sadat Sajadian Fard, Fatemeh Motevalli, Fatemeh Fotouhi Chahouki, Mohammad Reza Aghasadeghi, Azam Bolhassani, Seyed Mehdi Sadat, Ehsan Mostafavi, Nasir Mohajel, Ali Jahanian-Najafabadi, Mohammad Reza Amiran
BACKGROUND: Hepatitis C virus (HCV) genome contains an overlapping reading frame which results in alternative core protein (ARFP). Baculovirus expression system was used as a powerful eukaryotic vector system to express core+1/F protein for the first time. This recombinant core+1/F protein was used to assess the anti-core+1 antibody in anti-HCV drug resistant and sustained virologic response (SVR) patients. METHODS: The core+1 coding sequence from HCV genotype 1 was designed and synthesized in pUC57 vector...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28155177/cytoplasmic-expression-of-a-thermostable-invertase-from-thermotoga-maritima-in-lactococcus-lactis
#11
Han Bin Pek, Pei Yu Lim, Chengcheng Liu, Dong-Yup Lee, Xuezhi Bi, Fong Tian Wong, Dave Siak-Wei Ow
OBJECTIVES: To evaluate the secretory and cytoplasmic expression of a thermostable Thermogata maritima invertase in Lactococcus lactis. RESULTS: The thermostable invertase from T. maritima was cloned with and without the USP45 secretory peptide into the pNZ8148 vector for nisin-inducible expression in L. lactis. The introduction of an USP45 secretion peptide at the N-terminal of the enzyme led to a loss of protein solubility. Computational homology modeling and hydrophobicity studies indicated that the USP45 peptide exposes a stretch of hydrophobic amino acids on the protein surface resulting in lower solubility...
February 2, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28155120/novel-glycoside-from-wedelia-calendulacea-inhibits-diethyl-nitrosamine-induced-renal-cancer-via-downregulating-the-cox-2-and-peg2-through-nuclear-factor-%C3%AE%C2%BAb-pathway
#12
Amita Verma, Bahar Ahmed, Firoz Anwar, Mahfoozur Rahman, Dinesh Kumar Patel, Gaurav Kaithwas, Ravi Rani, Prakash C Bhatt, Vikas Kumar
A new compound derivative of glycoside 19-α-hydroxy-ursolic acid glucoside (19-α-hydroxyurs-12(13)-ene-28-oic acid-3-O-β-D-glucopyranoside (HEG) was isolated from whole plant of Wedelia calendulacea (Compositae). The structure was elucidated and established by standard spectroscopy approaches. Diethylnitrosamine (DEN) (200 mg/kg) and ferric nitrilotriacetate (Fe-NTA) (9 mg/kg) were used for induction of renal cell carcinoma (RCC) in the rats. The rats were further divided into different groups and were treated with HEG doses for 22 weeks...
February 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28155075/interference-from-proteins-and-surfactants-on-particle-size-distributions-measured-by-nanoparticle-tracking-analysis-nta
#13
Kelvin Bai, Gregory V Barnett, Sambit R Kar, Tapan K Das
PURPOSE: Characterization of submicron protein particles continues to be challenging despite active developments in the field. NTA is a submicron particle enumeration technique, which optically tracks the light scattering signal from suspended particles undergoing Brownian motion. The submicron particle size range NTA can monitor in common protein formulations is not well established. We conducted a comprehensive investigation with several protein formulations along with corresponding placebos using NTA to determine submicron particle size distributions and shed light on potential non-particle origin of size distribution in the range of approximately 50-300 nm...
February 2, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28146372/the-isolation-of-morphologically-intact-and-biologically-active-extracellular-vesicles-from-the-secretome-of-cancer-associated-adipose-tissue
#14
Sarah Jeurissen, Glenn Vergauwen, Jan Van Deun, Lore Lapeire, Victoria Depoorter, Ilkka Miinalainen, Raija Sormunen, Rudy Van den Broecke, Geert Braems, Véronique Cocquyt, Hannelore Denys, An Hendrix
Breast cancer cells closely interact with different cell types of the surrounding adipose tissue to favor invasive growth and metastasis. Extracellular vesicles (EVs) are nanometer-sized vesicles secreted by different cell types that shuttle proteins and nucleic acids to establish cell-cell communication. To study the role of EVs released by cancer-associated adipose tissue in breast cancer progression and metastasis a standardized EV isolation protocol that obtains pure EVs and maintains their functional characteristics is required...
February 1, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28125045/single-step-purification-of-monomeric-l-selectin-via-aptamer-affinity-chromatography
#15
Christian Kuehne, Stefanie Wedepohl, Jens Dernedde
l-selectin is a transmembrane receptor expressed on the surface of white blood cells and responsible for the tethering of leukocytes to vascular endothelial cells. This initial intercellular contact is the first step of the complex leukocyte adhesion cascade that ultimately permits extravasation of leukocytes into the surrounding tissue in case of inflammation. Here we show the binding of a soluble histidine tagged l-selectin to a recently described shortened variant of an l-selectin specific DNA aptamer with surface plasmon resonance...
January 24, 2017: Sensors
https://www.readbyqxmd.com/read/28123487/brain-derived-and-glial-cell-line-derived-neurotrophic-factor-fusion-protein-immobilization-to-laminin
#16
Baoxin Wang, Junjie Yuan, Jiafeng Xu, Xinwei Chen, Xinjiang Ying, Pin Dong
Damage to the recurrent laryngeal nerve often causes hoarseness, dyspnea, dysphagia, and sometimes asphyxia due to vocal cord paralysis which result in a reduction of quality of life. Brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) play critical roles in peripheral nerve regeneration. However, methods for efficiently delivering these molecules are lacking, which limits their use in clinical applications. The present study reports an effective strategy for targeting BDNF and GDNF to laminin by fusing the N-terminal domains of these molecules with agrin (NtA)...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28117823/using-scaffold-liposomes-to-reconstitute-lipid-proximal-protein-protein-interactions-in-vitro
#17
Ryan W Clinton, Jason A Mears
Studies of integral membrane proteins in vitro are frequently complicated by the presence of a hydrophobic transmembrane domain. Further complicating these studies, reincorporation of detergent-solubilized membrane proteins into liposomes is a stochastic process where protein topology is impossible to enforce. This paper offers an alternative method to these challenging techniques that utilizes a liposome-based scaffold. Protein solubility is enhanced by deletion of the transmembrane domain, and these amino acids are replaced with a tethering moiety, such as a His-tag...
January 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28114422/a-comparative-study-of-serum-exosome-isolation-using-differential-ultracentrifugation-and-three-commercial-reagents
#18
Inas Helwa, Jingwen Cai, Michelle D Drewry, Arthur Zimmerman, Michael B Dinkins, Mariam Lotfy Khaled, Mutsa Seremwe, W Michael Dismuke, Erhard Bieberich, W Daniel Stamer, Mark W Hamrick, Yutao Liu
Exosomes play a role in cell-to-cell signaling and serve as possible biomarkers. Isolating exosomes with reliable quality and substantial concentration is a major challenge. Our purpose is to compare the exosomes extracted by three different exosome isolation kits (miRCURY, ExoQuick, and Invitrogen Total Exosome Isolation Reagent) and differential ultracentrifugation (UC) using six different volumes of a non-cancerous human serum (5 ml, 1 ml, 500 μl, 250 μl, 100 μl, and 50 μl) and three different volumes (1 ml, 500 μl and 100 μl) of six individual commercial serum samples collected from human donors...
2017: PloS One
https://www.readbyqxmd.com/read/28112296/revisiting-binding-of-plutonium-to-transferrin-by-ce-icp-ms
#19
Sandrine Sauge-Merle, David Lemaire, Robert W Evans, Catherine Berthomieu, Jean Aupiais
Capillary electrophoresis coupled with an inductively coupled plasma mass spectrometer was applied for the first time to determine the binding constant of human transferrin (Tf) for tetravalent plutonium. The experiments were carried out in a buffer 2-(N-morpholino)ethanesulfonic acid (MES) at pH 6, 0.1 M NaCl and at a temperature of 25 °C. The nitrilotriacetate anion (NTA) used in this study prevents the hydrolysis of plutonium and is an ideal competitor with Tf for Pu, both ligands sharing comparable binding strength...
January 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28112295/a-dna-directed-covalent-conjugation-fluorescence-probe-for-in-vitro-detection-of-functional-matrix-metalloproteinases
#20
Nan Li, Linglu Yi, Ziyi He, Weifei Zhang, Haifang Li, Jin-Ming Lin
Matrix metalloproteinases (MMPs) have been considered to contribute to the progression of tumorigenesis and tumor invasion; MMP-9 in particular, has been regarded as a priority target in cancer treatment due to its massive up-regulation in malignant tissues and its ability to degrade type IV collagen. In this work, we employed a DNA-directed covalent conjugation method to design a fluorescence probe for in vitro detection of functional matrix metalloproteinases, by which a nitrilotriacetic acid (NTA)-modified DNA probe can combine with the Zn(2+) in the active site of MMPs, and then a molecule beacon (MB) modified FITC and BHQ1 can open to bond with their complementary base, NTA-modified DNA...
January 23, 2017: Analyst
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