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https://www.readbyqxmd.com/read/28106796/preparative-scale-resolution-of-enantiomers-enables-accelerated-drug-discovery-and-development
#1
Hanna Leek, Shalini Andersson
The provision of pure enantiomers is of increasing importance not only for the pharmaceutical industry but also for agro-chemistry and biotechnology. In drug discovery and development, the enantiomers of a chiral drug depict unique chemical and pharmacological behaviors in a chiral environment, such as the human body, in which the stereochemistry of the chiral drugs determines their pharmacokinetic, pharmacodynamic and toxicological properties. We present a number of challenging case studies of up-to-kilogram separations of racemic or enriched isomer mixtures using preparative liquid chromatography and super critical fluid chromatography to generate individual enantiomers that have enabled the development of new candidate drugs within AstraZeneca...
January 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28106407/matter-wave-optical-wave-mixing-induced-transparency-and-a-nonhyperbolic-matter-wave-quasisoliton-in-quantum-gases
#2
Yan Li, Chengjie Zhu, W R Garrett, E W Hagley, L Deng
The realization of atomic quantum gases has brought out surprising effects that have no correspondence in nonlinear optics with thermal gases, presenting intriguing and exciting challenges to the research discipline of nonlinear optics which has matured since the invention of the laser. Here, we show an unexpected optical wave-mixing gain cancellation effect in a quantum gas that restricts an, otherwise, strongly enhanced backward-propagating light-matter wave-mixing process. This results in a wave-mixing induced transparency and a nonhyperbolic quasi-matter-wave soliton that opens new research opportunities in hydrodynamic fluid research of degenerate quantum gases, such as phonon scattering in a two-dimensional sonic black hole horizon...
January 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28103277/protection-elicited-by-nasal-immunization-with-recombinant-pneumococcal-surface-protein-a-rpspa-adjuvanted-with-whole-cell-pertussis-vaccine-wp-against-co-colonization-of-mice-with-streptococcus-pneumoniae
#3
Rafaella O Tostes, Tasson C Rodrigues, Josefa B da Silva, Alessandra S Schanoski, Maria Leonor S Oliveira, Eliane N Miyaji
A promising alternative vaccine candidate to reduce the burden of pneumococcal diseases is the protein antigen PspA (Pneumococcal surface protein A). Since concomitant colonization with two or more pneumococcal strains is very common in children, we aimed to determine if immunization with PspA would be able to control co-colonization. We evaluated nasal immunization with recombinant PspA (rPspA) in a model of co-colonization with two strains expressing different PspAs. Mice were immunized intranasally with rPspAs from clades 1 to 4 (rPspA1, rPspA2, rPspA3 or rPspA4) using whole-cell pertussis vaccine (wP) as adjuvant...
2017: PloS One
https://www.readbyqxmd.com/read/28102732/exacerbating-effects-of-pm2-5-in-ova-sensitized-and-challenged-mice-and-the-expression-of-trpa1-and-trpv1-protein-in-lung
#4
Hong Liu, Xinsheng Fan, Naiqian Wang, Yuyan Zhang, Jinghua Yu
OBJECTIVE: To investigate the effects of PM2.5 on asthma-related phenotypes and on the expression of TRPA1, V1 protein in lung in a mouse model of asthma. METHODS: Female Balb/c mice were utilized to establish 28 and 42 day asthma models. Mice were sensitized with OVA and challenged with OVA, OVA plus normal saline (NS), or OVA plus PM2.5 at two doses, 1.6 mg·kg(-1) or 8.0 mg·kg(-1). PM2.5 was administrated by intratracheal instillationwithout anesthesia. 24 hours after the final OVA challenge changes in airway resistance (RI) and lung compliance (Cdyn) in response to acetylcholine chloride (ACH) were evaluated, and blood, bronchoalveolar lavage fluid (BALF) and lung tissue samples were taken...
January 19, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28102433/advanced-forensic-validation-for-human-spermatozoa-identification-using-sperm-hy-liter%C3%A2-express-with-quantitative-image-analysis
#5
Ayari Takamura, Ken Watanabe, Tomoko Akutsu
Identification of human semen is indispensable for the investigation of sexual assaults. Fluorescence staining methods using commercial kits, such as the series of SPERM HY-LITER™ kits, have been useful to detect human sperm via strong fluorescence. These kits have been examined from various forensic aspects. However, because of a lack of evaluation methods, these studies did not provide objective, or quantitative, descriptions of the results nor clear criteria for the decisions reached. In addition, the variety of validations was considerably limited...
January 19, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28100332/-expression-and-significance-of-mtor-4ebp1-hif-1%C3%AE-vegf-signaling-pathway-in-lung-tissues-of-asthmatic-mice
#6
Li Wang, Yan-Li Zhang, Xiu-Fang Wang, Zhe Song, Wei Wang
OBJECTIVE: To study the expression and significance of the mammalian target of rapamycin (mTOR)/eukaryote initiating factor 4E binding protein 1(4EBP1)/hypoxia inducible factor-1α (HIF-1α)/vascular endothelial growth factor (VEGF) signaling pathway in asthmatic mice. METHODS: Forty SPF level 6-8 week-old female Balb/C mice were randomly divided into control, asthma, budesonide and mTOR inhibitor (rapamycin) intervention groups (n=10 each). The asthmatic mouse model was prepared via OVA induction and challenge test...
January 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28099838/osteoarthritis-year-in-review-2016-biomarkers-biochemical-markers
#7
REVIEW
A Mobasheri, A-C Bay-Jensen, W E van Spil, J Larkin, M C Levesque
PURPOSE: The aim of this "Year in Review" article is to summarize and discuss the implications of biochemical marker related articles published between the Osteoarthritis Research Society International (OARSI) 2015 Congress in Seattle and the OARSI 2016 Congress in Amsterdam. METHODS: The PubMed/MEDLINE bibliographic database was searched using the combined keywords: 'biomarker' and 'osteoarthritis'. The PubMed/MEDLINE literature search was conducted using the Advanced Search Builder function (http://www...
January 2, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28098315/a-ph-responsive-wormlike-micellar-system-of-a-noncovalent-interaction-based-surfactant-with-a-tunable-molecular-structure
#8
Wanli Kang, Pengxiang Wang, Haiming Fan, Hongbin Yang, Caili Dai, Xia Yin, Yilu Zhao, Shujun Guo
Responsive wormlike micelles are very useful in a number of applications, whereas it is still challenging to create dramatic viscosity changes in wormlike micellar systems. Here we developed a pH-responsive wormlike micellar system based on a noncovalent constructed surfactant, which is formed by the complexation of N-erucamidopropyl-N,N-dimethylamine (UC22AMPM) and citric acid at the molar ratio of 3 : 1 (EACA). The phase behavior, aggregate microstructure and viscoelasticity of EACA solutions were investigated by macroscopic appearance observation, rheological and cryo-TEM measurements...
January 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28095479/central-role-of-il-23-and-il-17-producing-eosinophils-as-immunomodulatory-effector-cells-in-acute-pulmonary-aspergillosis-and-allergic-asthma
#9
Evelyn Santos Guerra, Chrono K Lee, Charles A Specht, Bhawna Yadav, Haibin Huang, Ali Akalin, Jun R Huh, Christian Mueller, Stuart M Levitz
Aspergillus fumigatus causes invasive pulmonary disease in immunocompromised hosts and allergic asthma in atopic individuals. We studied the contribution of lung eosinophils to these fungal diseases. By in vivo intracellular cytokine staining and confocal microscopy, we observed that eosinophils act as local sources of IL-23 and IL-17. Remarkably, mice lacking eosinophils had a >95% reduction in the percentage of lung IL-23p19+ cells as well as markedly reduced IL-23 heterodimer in lung lavage fluid. Eosinophils killed A...
January 17, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28094581/early-immunopathological-events-in-acute-model-of-mycobacterial-hypersensitivity-pneumonitis-in-mice
#10
Elisabet Johansson, Gregory P Boivin, Jagjit S Yadav
Prolonged exposure to antigens of non-tuberculous mycobacteria species colonizing industrial metalworking fluid (MWF), particularly Mycobacterium immunogenum (MI), has been implicated in chronic forms of hypersensitivity pneumonitis (HP) in machinists based on epidemiology studies and long-term exposure of mouse models. However, a role of short-term acute exposure to these antigens has not been described in the context of acute forms of HP. This study investigated short-term acute exposure of mice to MI cell lysate (or live cell suspension) via oropharyngeal aspiration...
January 17, 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28094478/fluid-management-in-cardiac-surgery-patients-pitfalls-challenges-and-solutions
#11
Elena Bignami, Marcello Guarnieri, Marco Gemma
Fluid administration is a powerful tool for hemodynamic stabilization as it increases preload and improves cardiac function in fluid-responsive patients. However, there are various types of fluid to choose from. The use of colloids and crystalloids in non-cardiac Intensive Care Units (ICU) has been reported, showing controversial results. Many trials on sepsis in a non-cardiac ICU setting show that colloids, in particular hydroxyethyl starches and gelatins, might have a detrimental effect on kidney function, and on major outcomes such as mortality...
January 17, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28093996/challenges-related-to-glycemic-control-in-type-2-diabetes-mellitus-patients
#12
Masoumeh Kheirandish, Hamidreza Mahboobi, Maryam Yazdanparast, Mohammad Amjad Kamal
Diabetes mellitus (DM) is a chronic disease with long-term complications. Glycemic control is an important part in management of DM. The first line in treatment of type 2 DM (T2DM) is diet and life style change. Metformin is the first choice of medication in T2DM patients. Sulfonylureas have high risk of hypoglycemia. Glinides are associated with lower risk of hypoglycemia in comparison to sulfonylureas. Also α-glucosidase inhibitors decrease the polysacarides digestion in small intestine and less effective in comparison to metformin and sulfonylureas in lowering hemoglobin A1c (HbA1c)...
January 15, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28093718/ribosomal-protein-s3-gene-silencing-protects-against-experimental-allergic-asthma
#13
Jinrui Dong, Wupeng Liao, Hong Yong Peh, Tze Khee Chan, W S Daniel Tan, Li Li, Amy Yong, W S Fred Wong
BACKGROUND AND PURPOSE: Ribosomal protein S3 (RPS3) is a 40S ribosomal protein of the S3P family essential for executing protein translation. RPS3 has recently been found to interact with the p65 subunit of the NF-κB complex, and promote p65 DNA-binding activity. Persistent activation of the NF-κB pathway is evident in allergic asthma. We hypothesized that gene silencing of lung RPS3 can ameliorate allergic airway inflammation. EXPERIMENTAL APPROACH: Gene silencing efficacy of RPS3 siRNA was screened in three different mouse cell lines by real-time PCR and immunoblotting...
January 17, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28092504/wall-shear-rate-measurement-validation-of-a-new-method-through-multiphysics-simulations
#14
Stefano Ricci, Abigail Swillens, Alessandro Ramalli, Patrick Segers, Piero Tortoli
Wall shear stress is known to affect the vessel endothelial function and to be related to important pathologies like the development of atherosclerosis. It is defined as the product of the blood viscosity by the blood velocity gradient at the wall position, i.e., the wall shear rate (WSR). The WSR measurement is particularly challenging in important cardiovascular sites, like the carotid bifurcation, because of the related complex flow configurations characterized by high spatial and temporal gradients, wall movement, and clutter noise...
January 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28092079/the-goal-of-locomotion-separating-the-fundamental-task-from-the-mechanisms-that-accomplish-it
#15
REVIEW
James L Croft, Ryan T Schroeder, John E A Bertram
Human locomotion has been well described but is still not well understood. This is largely true because the observable aspects of locomotion-neuromuscular activity that generates forces and motions-relate to both the task solution and the problem being solved. Identifying the fundamental task achieved in locomotion makes it possible to critically evaluate the motor control strategy used to accomplish the task goal. We contend that the readily observed movements and activities of locomotion should be considered mechanism(s)...
January 13, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28089919/an-orally-active-geranyl-acetophenone-attenuates-airway-remodeling-in-a-murine-model-of-chronic-asthma
#16
Yu Zhao Lee, Khozirah Shaari, Manraj Singh Cheema, Chau Ling Tham, Mohd Roslan Sulaiman, Daud Ahmad Israf
2,4,6-trihydroxy-3-geranyl acetophenone (tHGA) is a synthetic compound that is naturally found in Melicope ptelefolia. We had previously demonstrated that parenteral administration of tHGA reduces pulmonary inflammation in OVA-sensitized mice. In this study, we evaluated the effect of orally administered tHGA upon airway remodeling in a murine model of chronic asthma. Female BALB/C mice were sensitized intraperitoneally with ovalbumin (OVA) on day 0, 7 and 14, followed by aerosolized 1% OVA 3 times per week for 6 weeks...
January 12, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28089607/estimates-of-nasal-airflow-at-the-nasal-cycle-mid-point-improve-the-correlation-between-objective-and-subjective-measures-of-nasal-patency
#17
Courtney Gaberino, John S Rhee, Guilherme J M Garcia
INTRODUCTION: The nasal cycle represents a significant challenge when comparing pre- and post-surgery objective measures of nasal airflow. METHODS: Computational fluid dynamics (CFD) simulations of nasal airflow were conducted in 12 nasal airway obstruction patients showing significant nasal cycling between pre- and post-surgery computed tomography scans. To correct for the nasal cycle, mid-cycle models were created virtually. Subjective scores of nasal patency were obtained via the Nasal Obstruction Symptom Evaluation (NOSE) and unilateral visual analog scale (VAS)...
January 9, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28088808/shunt-surgery-in-idiopathic-intracranial-hypertension-aided-by-electromagnetic-navigation
#18
Elvis J Hermann, Manolis Polemikos, Hans E Heissler, Joachim K Krauss
BACKGROUND: Idiopathic intracranial hypertension (IIH) is characterized by increased cerebrospinal fluid (CSF) pressure and normal or slit ventricles. Lumboperitoneal shunting had been favored by many investigators for CSF diversion in IIH for decades; however, it has been associated with various side effects. Because of the small ventricular size adequate positioning of a ventricular catheter is challenging. OBJECTIVES: Here, we investigated the usefulness of electromagnetic (EM)-guided ventricular catheter placement for ventriculoperitoneal shunting in IIH...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088757/challenges-in-neonatal-transport-in-jamaica-a-resource-limited-setting
#19
Salome Henry, Helen Trotman
AIM: This study aimed to determine challenges associated with neonatal transport in Jamaica, a resource-limited setting. METHODS: This was a prospective descriptive study of neonates transported to the University Hospital of the West Indies (UHWI) over a 15 month period. Data on the clinical status of the neonates before, during and at the end of transport, as well as on accompanying staff and equipment, were collected. Neonatal demographics, reason for transfer and outcome at 48 h and at discharge were also collected...
January 14, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28088641/pathophysiological-and-behavioral-effects-of-systemic-inflammation-in-aged-and-diseased-rodents-with-relevance-to-delirium-a-systematic-review
#20
REVIEW
Leroy Schreuder, Bart J L Eggen, Knut P H Biber, Regien G Schoemaker, Jon D Laman, Sophia E de Rooij
Delirium is a frequent outcome for aged and demented patients that suffer a systemic inflammatory insult. Animal models that reconstruct these etiological processes have potential to provide a better understanding of the pathophysiology of delirium. Therefore, we systematically reviewed animal studies in which systemic inflammation was superimposed on aged or diseased animal models. In total, 77 studies were identified. Aged animals were challenged with a bacterial endotoxin in 29 studies, 25 studies superimposed surgery on aged animals, and in 6 studies a bacterial infection, Escherichia coli (E...
January 11, 2017: Brain, Behavior, and Immunity
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