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https://www.readbyqxmd.com/read/28900382/immunization-enhances-the-natural-antibody-repertoire
#1
Dylan Beinart, Daniel Ren, Cinthia Pi, Susan Poulton, Zoie E Holzknecht, Chelsea Swanson, William Parker
The role of immunization in the production of antibodies directed against immunogens is widely appreciated in laboratory animals and in humans. However, the role of immunization in the development of "natural antibodies" has not been investigated. Natural antibodies are those antibodies present without known history of infection or immunization, and react to a wide range of targets, including "cryptic" self-antigens that are exposed upon cell death. In this study, the ability of immunization to elicit the production of natural antibodies in laboratory rats was evaluated...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28899776/the-effect-of-temperature-on-the-mucosal-igm-antibody-response-to-dnp-klh-in-channel-catfish-ictalurus-punctatus
#2
Miles D Lange, Carl D Webster
Bath immersion remains a practical route for immunizing against disease in channel catfish; however research efforts in this area have revealed variable results when activating mucosal Ab responses with different antigens. This is likely due to a number of factors including the individual species, age of the fish, preparation of the immunogens, and differences in the overall dosage and the duration of exposure to vaccines. The current study sought to evaluate the effect of water temperature on the in vivo mucosal adaptive immune response in channel catfish to a protein-hapten antigen, DNP-KLH...
September 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28889381/oxidative-stress-in-urothelial-carcinogenesis-measurements-of-protein-carbonylation-and-intracellular-production-of-reactive-oxygen-species
#3
Patcharawalai Whongsiri, Suchittra Phoyen, Chanchai Boonla
Oxidative stress contributes substantially to urothelial carcinogenesis. Its extent can be assessed by measurements of reactive species (mainly reactive oxygen species (ROS)), oxidatively modified damage products, and levels of various antioxidants. We presented herein the methods for the measurement of protein carbonyl content and intracellular production of ROS. Protein carbonyl is the most commonly used indicator of protein oxidation because it is early formed and relatively stable under oxidative stress...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28888182/instrumentation-for-cryogenic-magic-angle-spinning-dynamic-nuclear-polarization-using-90l-of-liquid-nitrogen-per-day
#4
Brice J Albert, Seong Ho Pahng, Nicholas Alaniva, Erika L Sesti, Peter W Rand, Edward P Saliba, Faith J Scott, Eric J Choi, Alexander B Barnes
Cryogenic sample temperatures can enhance NMR sensitivity by extending spin relaxation times to improve dynamic nuclear polarization (DNP) and by increasing Boltzmann spin polarization. We have developed an efficient heat exchanger with a liquid nitrogen consumption rate of only 90L per day to perform magic-angle spinning (MAS) DNP experiments below 85K. In this heat exchanger implementation, cold exhaust gas from the NMR probe is returned to the outer portion of a counterflow coil within an intermediate cooling stage to improve cooling efficiency of the spinning and variable temperature gases...
September 1, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28887303/dynamic-nuclear-polarization-facilitates-monitoring-of-pyruvate-metabolism-in-trypanosoma-brucei
#5
You Zhuo, Ciro D Cordeiro, S Khan Hekmatyar, Roberto Docampo, James H Prestegard
Dynamic nuclear polarization (DNP) provides sensitivity improvements that make NMR a viable method for following metabolic conversions in real time. There are now many in vivo applications to animal systems and even to diagnosis of human disease. However, application to microbial systems is rare. Here we demonstrate its application to the pathogenic protozoan, Trypanosoma brucei, using hyperpolarized (13)C1- pyruvate as a substrate and compare the parasite metabolism to that of commonly cultured mammalian cell lines, HEK-293 and Hep-G2...
September 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28876443/innovation-in-learning-phd-and-dnp-student-collaborations
#6
Linda H Eaton, Debra B Gordon, Ardith Z Doorenbos
BACKGROUND: Working together, PhD and Doctor of Nursing Practice (DNP) students can advance knowledge creation and the translation of knowledge into practice. Although different in purpose and education, PhD and DNP programs should prepare students to collaborate throughout their careers. This article describes an innovative pilot project that partnered PhD and DNP students during their graduate programs. METHOD: Group meetings were used to facilitate collaboration among 12 PhD and DNP students interested in pain management...
September 1, 2017: Journal of Nursing Education
https://www.readbyqxmd.com/read/28872852/hydroxyapatites-key-structural-questions-and-answers-from-dnp-dynamic-nuclear-polarization
#7
Cesar Leroy, Fabien Aussenac, Laure Bonhomme-Coury, Akiyoshi Osaka, Satoshi Hayakawa, Florence Babonneau, Cristina Coelho Diogo, Christian Bonhomme
We demonstrate that NMR/DNP (Dynamic Nuclear Polarization) allows an unprecedented description of carbonate substituted hydroxyapatite (CHAp). Key structural questions related to order/disorder and clustering of carbonates are tackled by using distance sensitive DNP experiments using (13)C-(13)C recoupling. Such experiments are easily implemented due to huge DNP gain (orders of magnitude). DNP is efficiently mediated by quasi one-dimensional spin diffusion through the hydroxyl columns present in the CHAp structure (thought as "highways" for spin diffusion)...
September 5, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28864210/inhibition-of-the-mevalonate-pathway-by-simvastatin-interferes-with-mast-cell-degranulation-by-disrupting-the-interaction-between-rab27a-and-double-c2-alpha-proteins
#8
Muhammad Novrizal Abdi Sahid, Shuang Liu, Takeshi Kiyoi, Kazutaka Maeyama
Statins are well-known inhibitors of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase, which block the mevalonate pathway. The activity of statins not only decreases cholesterol levels but also ameliorates inflammation and modulates the immune system. In this study, we investigated the effects of simvastatin on histamine release using rat basophilic leukaemia (RBL-2H3) cells, and examined its interaction with proteins involved in the exocytosis process. Treatment with simvastatin for 24h inhibited histamine release in RBL-2H3 cells in a concentration-dependent manner after stimulation with dinitrophenylated bovine serum albumin (DNP-BSA, as an antigen), ionomycin (a calcium ion [Ca(2+)] ionophore), and thapsigargin (an inhibitor of Ca(2+)-ATPase in the endoplasmic reticulum)...
August 29, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28857281/single-scan-13c-diffusion-ordered-nmr-spectroscopy-of-dnp-hyperpolarised-substrates
#9
Ludmilla Guduff, Dennis Kurzbach, Carine van Heijenoort, Daniel Abergel, Jean-Nicolas Dumez
Diffusion-ordered NMR spectroscopy (DOSY) is a powerful approach for the analysis of molecular mixtures, yet its application range is limited by the relatively low sensitivity of NMR. We show here that spectrally resolved 13C DOSY data can be collected, in a single scan, for substrates hyperpolarised by dissolution dynamic nuclear polarisation (D-DNP), which provides signal enhancements of several orders of magnitude. For this we use a convection-compensation pulse scheme, which we also analyse by numerical simulation...
August 31, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28840511/nanoparticle-encapsulated-emodin-decreases-diabetic-neuropathic-pain-probably-via-a-mechanism-involving-p2x3-receptor-in-the-dorsal-root-ganglia
#10
Lin Li, Xuan Sheng, Shanhong Zhao, Lifang Zou, Xinyao Han, Yingxin Gong, Huilong Yuan, Liran Shi, Lili Guo, Tianyu Jia, Shuangmei Liu, Bing Wu, Zhihua Yi, Hui Liu, Yun Gao, Guilin Li, Guodong Li, Chunping Zhang, Hong Xu, Shangdong Liang
Diabetic peripheral neuropathy (DPN) is the most common complication of diabetes mellitus (DM). More than 90% of all cases of DM belong to type 2 diabetes mellitus (T2DM). Emodin is the main active component of Radix et rhizoma rhei and has anti-bacterial, anti-viral, anti-ulcerogenic, anti-inflammatory, and anti-cancer effects. Nanoparticle encapsulation of drugs is beneficial for drug targeting and bioavailability as well as for lowering drug toxicity side effects. The aim of this study was to investigate the effects of nanoparticle-encapsulated emodin (nano emodin) on diabetic neuropathic pain (DNP) mediated by the Purin 2X3 (P2X3) receptor in the dorsal root ganglia (DRG)...
August 24, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28840133/whole-body-distribution-of-donepezil-as-an-acetylcholinesterase-inhibitor-after-oral-administration-in-normal-human-subjects-a-11-c-donepezil-pet-study
#11
Ikuko Mochida, Eku Shimosegawa, Yasukazu Kanai, Sadahiro Naka, Keiko Matsunaga, Kayako Isohashi, Genki Horitsugi, Tadashi Watabe, Hiroki Kato, Jun Hatazawa
OBJECTIVES: It is difficult to investigate the whole-body distribution of an orally administered drug by means of positron emission tomography (PET), owing to the short physical half-life of radionuclides, especially when (11)C-labeled compounds are tested. Therefore, we aimed to examine the whole-body distribution of donepezil (DNP) as an acetylcholinesterase inhibitor by means of (11)C-DNP PET imaging, combined with the oral administration of pharmacological doses of DNP. METHODS: We studied 14 healthy volunteers, divided into group A (n=4) and group B (n=10)...
2017: Asia Oceania Journal of Nuclear Medicine & Biology
https://www.readbyqxmd.com/read/28834782/improved-strategies-for-dnp-enhanced-2d-1-h-x-heteronuclear-correlation-spectroscopy-of-surfaces
#12
Takeshi Kobayashi, Frédéric A Perras, Umesh Chaudhary, Igor I Slowing, Wenyu Huang, Aaron D Sadow, Marek Pruski
We demonstrate that dynamic nuclear polarization (DNP)-enhanced (1)H-X heteronuclear correlation (HETCOR) measurements of hydrogen-rich surface species are better accomplished by using proton-free solvents. This approach notably prevents HETCOR spectra from being obfuscated by the solvent-derived signals otherwise present in DNP measurements. Additionally, in the hydrogen-rich materials studied here, which included functionalized mesoporous silica nanoparticles and metal organic frameworks, the use of proton-free solvents afforded higher sensitivity gains than the commonly used solvents containing protons...
August 12, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28832462/quality-and-safety-education-for-nurses-competencies-in-doctor-of-nursing-practice-education-exemplars-from-education-and-practice
#13
Cindy Acton, Susan Farus-Brown, Catherine Alexander, Linda Morrow, Julianne Ossege, Elizabeth Tovar
Graduate level Quality and Safety Education for Nurses (QSEN) competencies were created to facilitate preparation of the Doctor of Nursing Practice (DNP) graduate to have an impact on health care system changes, advance nursing practice, and improve the health of populations. Although there is agreement that QSEN competencies are important to DNP education, little is known about implementation of the competencies. This article describes the importance of QSEN competencies in DNP education and provides exemplars of QSEN competencies in DNP education and practice...
September 2017: Nurse Educator
https://www.readbyqxmd.com/read/28821452/pinocembrin-a-novel-histidine-decarboxylase-inhibitor-with-anti-allergic-potential-in-in-vitro
#14
Hamza Hanieh, Villianur Ibrahim Hairul Islam, Subramanian Saravanan, Muthiah Chellappandian, Kessavane Ragul, Arumugam Durga, Kaliyamoorthy Venugopal, Venugopal Senthilkumar, Palanisamy Senthilkumar, Krishnaraj Thirugnanasambantham
Pinocembrin (5, 7- dihydroxy flavanone) is the most abundant chiral flavonoid found in propolis, exhibiting antioxidant, antimicrobial and anti-inflammatory properties. However, the effect of Pinocembrin on allergic response is unexplored. Thus, current study aimed at investigating the effects of Pinocembrin on IgE-mediated allergic response in vitro. A special emphasis was directed toward histidine decarboxylase (HDC) and other pro-allergic and pro-inflammatory mediators. Preliminary studies, using a microbiological model of Klebsiella pneumoniae, provided first evidences that suggest Pinocembrin as a potential thermal stable inhibitor for HDC...
August 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28817477/transitioning-to-the-dnp-ensuring-integrity-of-the-curriculum-through-curriculum-mapping
#15
Pamela F Levin, Rosemarie Suhayda
No abstract text is available yet for this article.
August 16, 2017: Nurse Educator
https://www.readbyqxmd.com/read/28817268/natural-organic-matter-concentration-impacts-the-interaction-of-functionalized-diamond-nanoparticles-with-model-and-actual-bacterial-membranes
#16
Arielle C Mensch, Rodrigo Tapia Hernandez, Joshua E Kuether, Marco D Torelli, Z Vivian Feng, Robert J Hamers, Joel A Pedersen
Changes to nanoparticle surface charge, colloidal stability, and hydrodynamic properties induced by interaction with natural organic matter (NOM) warrant consideration in assessing the potential for these materials to adversely impact organisms in the environment. Here we show that acquisition of a coating, or "corona", of NOM alters the hydrodynamic and electrokinetic properties of diamond nanoparticles (DNPs) functionalized with the polycation poly(allylamine HCl) in a manner that depends on the NOM-to-DNP concentration ratio...
August 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28813645/lat-is-essential-for-the-mast-cell-stabilising-effect-of-thga-in-ige-mediated-mast-cell-activation
#17
Ji Wei Tan, Daud Ahmad Israf, Nur Fariesha Md Hashim, Yoke Kqueen Cheah, Hanis Hazeera Harith, Khozirah Shaari, Chau Ling Tham
Mast cells play a central role in the pathogenesis of allergic reaction. Activation of mast cells by antigens is strictly dependent on the influx of extracellular calcium that involves a complex interaction between signalling molecules located within the cells. We have previously reported that tHGA, an active compound originally isolated from a local shrub known as Melicope ptelefolia, prevented IgE-mediated mast cell activation and passive systemic anaphylaxis by suppressing the release of interleukin-4 (IL-4) and tumour necrosis factor (TNF)-α from activated rat basophilic leukaemia (RBL)-2H3 cells...
August 13, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28794269/the-fc%C3%AE%C2%B5ri-signaling-cascade-and-integrin-trafficking-converge-at-patterned-ligand-surfaces
#18
Devin L Wakefield, David Holowka, Barbara Baird
We examined the spatial targeting of early and downstream signaling mediated by the IgE receptor (FcεRI) in RBL mast cells utilizing surface-patterned 2,4 dinitrophenyl (DNP) ligands. Micron-sized features of DNP are presented as densely immobilized conjugates of bovine serum albumin (DNP-BSA) or mobile in a supported lipid bilayer (DNP-SLB). Although soluble anti-DNP IgE binds uniformly across features for both pattern types, IgE bound to FcεRI on cells shows distinctive distributions: uniform for DNP-SLB and edge-concentrated for DNP-BSA...
August 9, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28772216/minocycline-attenuates-the-development-of-diabetic-neuropathy-by-inhibiting-spinal-cord-notch-signaling-in-rat
#19
Cheng Yang, Jie Gao, Banglin Wu, Nuo Yan, Hui Li, Yiqing Ren, Yufei Kan, Jiamin Liang, Yang Jiao, Yonghao Yu
We studied the effects of minocycline (an inhibitor of microglial activation) on the expression and activity of Notch-1 receptor, and explored the therapeutic efficacy of minocycline combined with Notch inhibitor DAPT in the treatment of diabetic neuropathic pain (DNP). Diabetic rat model was established by intraperitoneal injection (ip) of Streptozotocin (STZ). Expression and activity of Notch-1 and expression of macrophage/microglia marker Iba-1 were detected by WB. Diabetes induction significantly attenuated sciatic nerve conduction velocity, and dramatically augmented the expression and the activity of Notch-1 in the lumbar enlargement of the spinal cord...
October 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28762740/in-situ-characterization-of-pharmaceutical-formulations-by-dynamic-nuclear-polarization-enhanced-mas-nmr
#20
Qing Zhe Ni, Fengyuan Yang, Thach V Can, Ivan V Sergeyev, Suzanne M D'Addio, Sudheer K Jawla, Yongjun Li, Maya P Lipert, Wei Xu, R Thomas Williamson, Anthony Leone, Robert G Griffin, Yongchao Su
A principal advantage of magic angle spinning (MAS) NMR spectroscopy lies in its ability to determine molecular structure in a noninvasive and quantitative manner. Accordingly, MAS should be widely applicable to studies of the structure of active pharmaceutical ingredients (API) and formulations. However, the low sensitivity encountered in spectroscopy of natural abundance APIs present at low concentration has limited the success of MAS experiments. Dynamic nuclear polarization (DNP) enhances NMR sensitivity and can be used to circumvent this problem provided that suitable paramagnetic polarizing agent can be incorporated into the system without altering the integrity of solid dosages...
August 31, 2017: Journal of Physical Chemistry. B
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