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https://www.readbyqxmd.com/read/28526789/a-novel-iron-dependent-enzyme-that-catalyzes-the-initial-step-in-the-biodegradation-of-n-nitroglycine-by-variovorax-sp-strain-js1663
#1
Kristina M Mahan, Hangping Zheng, Tekle T Fida, Ronald J Parry, David E Graham, Jim C Spain
Nitramines are key constituents of most of the explosives in current use and consequently contaminate soil and groundwater at many military facilities around the world. Toxicity from nitramine contamination poses a health risk to plants and animals, thus understanding how nitramines are biodegraded is critical to environmental remediation. The biodegradation of synthetic nitramine compounds such as hexahydro-1,3,5-trinitro-1,3,5- triazine (RDX) has been studied for decades, but little is known about the catabolism of naturally produced nitramine compounds...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28514449/human-glp-1-receptor-transmembrane-domain-structure-in-complex-with-allosteric-modulators
#2
Gaojie Song, Dehua Yang, Yuxia Wang, Chris de Graaf, Qingtong Zhou, Shanshan Jiang, Kaiwen Liu, Xiaoqing Cai, Antao Dai, Guangyao Lin, Dongsheng Liu, Fan Wu, Yiran Wu, Suwen Zhao, Li Ye, Gye Won Han, Jesper Lau, Beili Wu, Michael A Hanson, Zhi-Jie Liu, Ming-Wei Wang, Raymond C Stevens
The glucagon-like peptide-1 receptor (GLP-1R) and the glucagon receptor (GCGR) are members of the secretin-like class B family of G-protein-coupled receptors (GPCRs) and have opposing physiological roles in insulin release and glucose homeostasis. The treatment of type 2 diabetes requires positive modulation of GLP-1R to inhibit glucagon secretion and stimulate insulin secretion in a glucose-dependent manner. Here we report crystal structures of the human GLP-1R transmembrane domain in complex with two different negative allosteric modulators, PF-06372222 and NNC0640, at 2...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28509588/peg-lipid-plga-hybrid-nanoparticles-loaded-with-berberine-phospholipid-complex-to-facilitate-the-oral-delivery-efficiency
#3
Fei Yu, Mingtao Ao, Xiao Zheng, Nini Li, Junjie Xia, Yang Li, Donghui Li, Zhenqing Hou, Zhongquan Qi, Xiao Dong Chen
The natural product berberine (BBR), present in various plants, arouses great interests because of its numerous pharmacological effects. However, the further development and application of BBR had been hampered by its poor oral bioavailability. In this work, we report on polymer-lipid hybrid nanoparticles (PEG-lipid-PLGA NPs) loaded with BBR phospholipid complex using a solvent evaporation method for enhancing the oral BBR efficiency. The advantage of this new drug delivery system is that the BBR-soybean phosphatidylcholine complex (BBR-SPC) could be used to enhance the liposolubility of BBR and improve the affinity with the biodegradable polymer to increase the drug-loading capacity and controlled/sustained release...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28508278/physiotherapy-programme-reduces-fatigue-in-patients-with-advanced-cancer-receiving-palliative-care-randomized-controlled-trial
#4
Anna Pyszora, Jacek Budzyński, Agnieszka Wójcik, Anna Prokop, Małgorzata Krajnik
PURPOSE: Cancer-related fatigue (CRF) is a common and relevant symptom in patients with advanced cancer that significantly decreases their quality of life. The aim of this study was to evaluate the effect of a physiotherapy programme on CRF and other symptoms in patients diagnosed with advanced cancer. METHODS: The study was designed as a randomized controlled trial. Sixty patients diagnosed with advanced cancer receiving palliative care were randomized into two groups: the treatment group (n = 30) and the control group (n = 30)...
May 16, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28507808/pro-necrotic-molecules-impact-local-immunosurveillance-in-human-breast-cancer
#5
Gautier Stoll, Yuting Ma, Heng Yang, Oliver Kepp, Laurence Zitvogel, Guido Kroemer
Necrosis culminates in spilling cellular content through the permeabilized plasma membrane, thereby releasing potentially immunostimulatory molecules in the pericellular space of dead cells. Accordingly, molecules involved in necroptotic signaling, such as receptor-interacting serine/threonine-protein kinase 3 (RIPK3) and mixed lineage kinase-like (MLKL) have been found to stimulate anticancer immune responses in mouse models of chemotherapy. mRNAs encoding prominent pro-necrotic gene products (RIPK1, RIPK3, MLKL, PGAM5 and DFNA5) were correlated with immune-related metagenes in several cancer types (breast, colorectal, lung, ovary, melanoma), revealing the strongest associations in breast cancer...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28506212/guideseq-a-bioconductor-package-to-analyze-guide-seq-datasets-for-crispr-cas-nucleases
#6
Lihua Julie Zhu, Michael Lawrence, Ankit Gupta, Hervé Pagès, Alper Kucukural, Manuel Garber, Scot A Wolfe
BACKGROUND: Genome editing technologies developed around the CRISPR-Cas9 nuclease system have facilitated the investigation of a broad range of biological questions. These nucleases also hold tremendous promise for treating a variety of genetic disorders. In the context of their therapeutic application, it is important to identify the spectrum of genomic sequences that are cleaved by a candidate nuclease when programmed with a particular guide RNA, as well as the cleavage efficiency of these sites...
May 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28503311/a-community-resource-for-exploring-and-utilizing-genetic-diversity-in-the-usda-pea-single-plant-plus-collection
#7
William L Holdsworth, Elodie Gazave, Peng Cheng, James R Myers, Michael A Gore, Clarice J Coyne, Rebecca J McGee, Michael Mazourek
Globally, pea (Pisum sativum L.) is an important temperate legume crop for food, feed and fodder, and many breeding programs develop cultivars adapted to these end-uses. In order to assist pea development efforts, we assembled the USDA Pea Single Plant Plus Collection (PSPPC), which contains 431 P. sativum accessions with morphological, geographic and taxonomic diversity. The collection was characterized genetically in order to maximize its value for trait mapping and genomics-assisted breeding. To that end, we used genotyping-by-sequencing-a cost-effective method for de novo single-nucleotide polymorphism (SNP) marker discovery-to generate 66 591 high-quality SNPs...
2017: Horticulture Research
https://www.readbyqxmd.com/read/28482604/silver-nanoparticle-and-lysozyme-tannic-acid-layer-by-layer-assembly-antimicrobial-multilayer-on-magnetic-nanoparticle-by-an-eco-friendly-route
#8
Xi Wang, Weiwei Cao, Qian Xiang, Feng Jin, Xuefeng Peng, Qiang Li, Min Jiang, Bingcheng Hu, Xiaodong Xing
A facile, economical and green synthetic route was developed to fabricate magnetic nanocomposite arming with silver nanoparticles (AgNPs) for antibacterial application. In this synthesis, two natural compounds, positively charged lysozyme (Lys) and negatively charged tannic acid (TA), were alternately deposited on Fe3O4 nanoparticles (IONPs) surface by layer-by-layer (LbL) self-assembly technique. And then AgNPs were embedded by an in situ reduction of Ag(+) so as to achieve complementary antibacterial functions to act against Gram-positive and Gram-negative bacteria...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28475308/isomeric-separation-of-permethylated-glycans-by-porous-graphitic-carbon-pgc-lc-ms-ms-at-high-temperatures
#9
Shiyue Zhou, Yifan Huang, Xue Dong, Wenjing Peng, Lucas Veillon, Daniel A S Kitagawa, Adelia J A Aquino, Yehia Mechref
Permethylation is a common derivatization method for MS-based glycomic analyses. Permethylation enhances glycan ionization efficiency in positive MS analysis and improves glycan structural stability. Recent biological glycomic studies have added to the growing body of knowledge and suggest the need for complete structural analysis of glycans. However, reverse phase LC analysis of permethylated glycans usually results in poor isomeric separation. To achieve isomeric separation of permethylated glycans, a porous graphitic carbon (PGC) column was used...
May 5, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28467903/locally-triggered-release-of-the-chemokine-ccl21-promotes-dendritic-cell-transmigration-across-lymphatic-endothelia
#10
Kari Vaahtomeri, Markus Brown, Robert Hauschild, Ingrid De Vries, Alexander Franz Leithner, Matthias Mehling, Walter Anton Kaufmann, Michael Sixt
Trafficking cells frequently transmigrate through epithelial and endothelial monolayers. How monolayers cooperate with the penetrating cells to support their transit is poorly understood. We studied dendritic cell (DC) entry into lymphatic capillaries as a model system for transendothelial migration. We find that the chemokine CCL21, which is the decisive guidance cue for intravasation, mainly localizes in the trans-Golgi network and intracellular vesicles of lymphatic endothelial cells. Upon DC transmigration, these Golgi deposits disperse and CCL21 becomes extracellularly enriched at the sites of endothelial cell-cell junctions...
May 2, 2017: Cell Reports
https://www.readbyqxmd.com/read/28464076/impact-of-a-timed-release-follicle-stimulating-hormone-treatment-from-one-to-three-months-of-age-on-endocrine-and-testicular-development-of-prepubertal-bulls
#11
B R Harstine, L H Cruppe, F M Abreu, M D Utt, R S Cipriano, A Lemes, C Premanandan, J M DeJarnette, M L Day
In prepubertal bulls, FSH facilitates testis maturation and a transient proliferation of Sertoli cells. Two experiments examined the effects of exogenous FSH on hormone secretion and testis development in Angus bulls. Exogenous FSH treatment consisted of an intramuscular injection (i.m.) of 30 mg FSH (Folltropin-V) in a 2% hyaluronic acid solution (FSH-HA). In Exp. 1, bulls (50 ± 6.5 d of age) received either FSH-HA ( = 5) or saline (control; = 5) on d 50 and 53.5. Blood samples were collected via jugular venipuncture to assess FSH concentrations every 6 h for 24 h after treatment and every 12 h until 84 h...
April 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28457879/the-role-of-system-xc-in-methamphetamine-induced-dopaminergic-neurotoxicity-in-mice
#12
Duy-Khanh Dang, Eun-Joo Shin, Hai-Quyen Tran, Dae-Joong Kim, Ji Hoon Jeong, Choon-Gon Jang, Seung-Yeol Nah, Hideyo Sato, Toshitaka Nabeshima, Yukio Yoneda, Hyoung-Chun Kim
The cystine/glutamate antiporter (system Xc(-), Sxc) transports cystine into cell in exchange for glutamate. Since xCT is a specific subunit of Sxc, we employed xCT knockout mice and investigated whether this antiporter affected methamphetamine (MA)-induced dopaminergic neurotoxicity. MA treatment significantly increased striatal oxidative burdens in wild type mice. xCT inhibitor [i.e., S-4-carboxy-phenylglycine (CPG), sulfasalazine] or an xCT knockout significantly protected against these oxidative burdens...
April 27, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28457177/high-sensitivity-cardiac-troponin-assays-from-improved-analytical-performance-to-enhanced-risk-stratification
#13
Marek Kozinski, Magdalena Krintus, Jacek Kubica, Grazyna Sypniewska
Implementation of cardiac troponin (cTn) assays has revolutionized the diagnosis, risk stratification, triage and management of patients with suspected myocardial infarction (MI). The Universal Definition of MI brought about a shift in the diagnostics of MI, from an approach primarily based on electrocardiography (ECG) to one primarily based on biomarkers. Currently, detection of a rise and/or fall in concentration or activity of myocardial necrosis biomarkers, preferentially cTns, with at least one value above the 99th percentile upper reference limit (URL), is the essential component for the diagnosis of MI...
May 2017: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/28451184/combatting-amr-photoactivatable-ruthenium-ii-isoniazid-complex-exhibits-rapid-selective-antimycobacterial-activity
#14
Nichola A Smith, Pingyu Zhang, Simon E Greenough, Michael D Horbury, Guy J Clarkson, Daniel McFeely, Abraha Habtemariam, Luca Salassa, Vasilios G Stavros, Christopher G Dowson, Peter J Sadler
The novel photoactive ruthenium(ii) complex cis-[Ru(bpy)2(INH)2][PF6]2 (1·2PF6, INH = isoniazid) was designed to incorporate the anti-tuberculosis drug, isoniazid, that could be released from the Ru(ii) cage by photoactivation with visible light. In aqueous solution, 1 rapidly released two equivalents of isoniazid and formed the photoproduct cis-[Ru(bpy)2(H2O)2](2+) upon irradiation with 465 nm blue light. We screened for activity against bacteria containing the three major classes of cell envelope: Gram-positive Bacillus subtilis, Gram-negative Escherichia coli, and Mycobacterium smegmatis in vitro using blue and multi-colored LED multi-well arrays...
January 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28450783/vancomycin-modified-fe3o4-sio2-ag-microflowers-as-effective-antimicrobial-agents
#15
Chongwen Wang, Kehan Zhang, Zhe Zhou, Qingjun Li, Liting Shao, Rong Zhang Hao, Rui Xiao, Shengqi Wang
Nanomaterials combined with antibiotics exhibit synergistic effects and have gained increasing interest as promising antimicrobial agents. In this study, vancomycin-modified magnetic-based silver microflowers (Van/Fe3O4@SiO2@Ag microflowers) were rationally designed and prepared to achieve strong bactericidal ability, a wide antimicrobial spectrum, and good recyclability. High-performance Fe3O4@SiO2@Ag microflowers served as a multifunction-supporting matrix and exhibited sufficient magnetic response property due to their 200 nm Fe3O4 core...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28449997/electrospinning-of-cyclodextrin-linalool-inclusion-complex-nanofibers-fast-dissolving-nanofibrous-web-with-prolonged-release-and-antibacterial-activity
#16
Zeynep Aytac, Zehra Irem Yildiz, Fatma Kayaci-Senirmak, Turgay Tekinay, Tamer Uyar
The volatility and limited water solubility of linalool is a critical issue to be solved. Here, we demonstrated the electrospinning of polymer-free nanofibrous webs of cyclodextrin/linalool-inclusion complex (CD/linalool-IC-NFs). Three types of modified cyclodextrin (HPβCD, MβCD, and HPγCD) were used to electrospin CD/linalool-IC-NFs. Free-standing CD/linalool-IC-NFs facilitate maximum loading of linalool up to 12% (w/w). A significant amount of linalool (45-89%) was preserved in CD/linalool-IC-NFs, due to enhancement in the thermal stability of linalool by cyclodextrin inclusion complexation...
September 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28446243/targeting-metabotropic-glutamate-receptors-for-novel-treatments-of-schizophrenia
#17
REVIEW
James Maksymetz, Sean P Moran, P Jeffrey Conn
Support for the N-methyl-D-aspartate receptor (NMDAR) hypofunction hypothesis of schizophrenia has led to increasing focus on restoring proper glutamatergic signaling as an approach for treatment of this devastating disease. The ability of metabotropic glutamate (mGlu) receptors to modulate glutamatergic neurotransmission has thus attracted considerable attention for the development of novel antipsychotics. Consisting of eight subtypes classified into three groups based on sequence homology, signal transduction, and pharmacology, the mGlu receptors provide a wide range of targets to modulate NMDAR function as well as glutamate release...
April 26, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28441677/building-a-global-online-community-of-practice-the-openpediatrics-world-shared-practices-video-series
#18
Traci A Wolbrink, Niranjan Kissoon, Nabila Mirza, Jeffrey P Burns
PROBLEM: Health care professionals are familiar with engaging in local communities of practice (CoPs) within their hospital, region, and/or country, but despite the availability of online technologies that facilitate online global collaboration, the health care sector has yet to fully embrace these tools. APPROACH: In 2013, OPENPediatrics (an online social learning platform) launched the World Shared Practices video (WSP) series to engage and coalesce the global community of critical care clinicians...
May 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28436438/spatiotemporally-and-sequentially-controlled-drug-release-from-polymer-gatekeeper-hollow-silica-nanoparticles
#19
L Palanikumar, M T Jeena, Kibeom Kim, Jun Yong Oh, Chaekyu Kim, Myoung-Hwan Park, Ja-Hyoung Ryu
Combination chemotherapy has become the primary strategy against cancer multidrug resistance; however, accomplishing optimal pharmacokinetic delivery of multiple drugs is still challenging. Herein, we report a sequential combination drug delivery strategy exploiting a pH-triggerable and redox switch to release cargos from hollow silica nanoparticles in a spatiotemporal manner. This versatile system further enables a large loading efficiency for both hydrophobic and hydrophilic drugs inside the nanoparticles, followed by self-crosslinking with disulfide and diisopropylamine-functionalized polymers...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28433506/heifers-express-g-protein-coupled-receptor-61-in-anterior-pituitary-gonadotrophs-in-stage-dependent-manner
#20
Kiran Pandey, Onalenna Kereilwe, Vitaliano Borromeo, Hiroya Kadokawa
Gonadotropin-releasing hormone receptors (GnRHRs) colocalize with insulin and glucocorticoid receptors in lipid rafts of the gonadotroph plasma membrane, where they facilitate downstream signaling. We recently found that orphan G-protein-coupled receptor (GPR)61 is expressed in the anterior pituitary (AP) of heifers, leading us to speculate that GPR61 colocalizes with GnRHR in the plasma membrane of gonadotroph and is expressed at specific times of the reproductive cycle. To test this hypothesis, we examined the coexpression of GnRHR, GPR61, and either luteinizing hormone (LH) β subunit or follicle-stimulating hormone (FSH) β subunit in AP tissue and cultured AP cells by immunofluorescence microscopy...
April 4, 2017: Animal Reproduction Science
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