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https://www.readbyqxmd.com/read/28812886/room-temperature-ring-opening-of-quinoline-isoquinoline-and-pyridine-with-low-valent-titanium
#1
Seung-Yeol Baek, Takashi Kurogi, Dahye Kang, Masahiro Kamitani, Seongyeon Kwon, Douglas Solowey, Chun-Hsing Chen, Maren Pink, Patrick J Carroll, Daniel J Mindiola, Mu-Hyun Baik
The complex (PNP)Ti=CHtBu(CH2tBu) (PNP = N[2-PiPr2-4-methylphenyl]2-) dehydrogenates cyclohexane to cyclohexene by forming a transient low-valent titanium-alkyl species, [(PNP)Ti(CH2tBu)], which reacts with two equivalents of quinoline (Q) at room temperature to form H3CtBu and a Ti(IV) species where the less hindered C2=N1 bond of Q is ruptured and coupled to another equivalent of Q. The product isolated from this reaction is an imide with a tethered cycloamide group, (PNP)Ti=N[C18H13N] (1). Under photolytic conditions, intramolecular C-H bond activation across the imide-moiety in 1 occurs to form 2, and thermolysis reverses this process...
August 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28810847/fev1-and-fvc-and-systemic-inflammation-in-a-spinal-cord-injury-cohort
#2
Jaime E Hart, Rebekah Goldstein, Palak Walia, Merilee Teylan, Antonio Lazzari, Carlos G Tun, Eric Garshick
BACKGROUND: Systemic inflammation has been associated with reduced pulmonary function in individuals with and without chronic medical conditions. Individuals with chronic spinal cord injury (SCI) have clinical characteristics that promote systemic inflammation and also have reduced pulmonary function. We sought to assess the associations between biomarkers of systemic inflammation with pulmonary function in a chronic SCI cohort, adjusting for other potential confounding factors. METHODS: Participants (n = 311) provided a blood sample, completed a respiratory health questionnaire, and underwent spirometry...
August 15, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28809621/cardiovascular-risk-factors-and-mortality-in-children-with-chronic-kidney-disease
#3
Abdullahi Mudi, Caroline Dickens, Cecil Levy, Daynia Ballot
BACKGROUND: Cardiovascular disease (CVD) begins early in children with chronic kidney disease (CKD), and its progression is determined by the presence of single or multiple cardiovascular risk factors (CVRFs). OBJECTIVE: To determine the prevalence of CVRFs in children with CKD and their association with mortality in children on chronic dialysis. METHODS: This comparative cross-sectional study recruited children aged 5 - 18 years with all stages of CKD...
July 28, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28809544/mechanistic-insights-into-alkane-metathesis-catalyzed-by-silica-supported-tantalum-hydrides-a-dft-study
#4
Francisco Núñez-Zarur, Xavier Solans-Monfort, Albeiro Restrepo
Alkane metathesis transforms small alkanes into their higher and lower homologues. The reaction is catalyzed by either supported d(0) metal hydrides (M = Ta, W) or d(0) alkyl alkylidene complexes (M = Ta, Mo, W, Re). For the silica-supported tantalum hydrides, several reaction mechanisms have been proposed. We performed DFT-D3 calculations to analyze the viability of the proposed pathways and compare them with alkane hydrogenolysis, which is a competitive process observed at the early stages of the reaction...
August 15, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28809405/benzotrifuran-btfuran-a-building-block-for-%C3%AF-conjugated-systems
#5
Renan B Ferreira, Jose M Figueroa, Danielle E Fagnani, Khalil A Abboud, Ronald K Castellano
Reported here is the first synthesis, X-ray crystal structure, and derivatization of benzotrifuran (BTFuran). Single crystal X-ray analysis of BTFuran shows a tight hexagonal packing stabilized by π-stacking interactions and C-H···O contacts. α-Lithiation of BTFuran enables the preparation of reactive intermediates suitable for cross-coupling reactions, allowing access to representative BTFuran-containing π-conjugated systems.
August 15, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28807294/recombinase-polymerase-amplification-rpa-combined-with-lateral-flow-lf-strip-for-detection-of-toxoplasma-gondii-in-the-environment
#6
Y D Wu, M J Xu, Q Q Wang, C X Zhou, M Wang, X Q Zhu, D H Zhou
Toxoplasma gondii infects all warm-blooded vertebrates, resulting in a great threat to human health and significant economic loss to the livestock industry. Ingestion of infectious oocysts of T. gondii from the environment is the major source of transmission. Detection of T. gondii oocysts by existing methods is laborious, time-consuming and expensive. The objective of the present study was to develop a recombinase polymerase amplification (RPA) method combined with a lateral flow (LF) strip for detection of T...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28806471/limited-uptake-of-ulcerative-colitis-treat-to-target-recommendations-in-real-world-practice
#7
Robert V Bryant, Samuel P Costello, Scott Schoeman, Dharshan Sathananthan, Emma Knight, Su-Yin Lau, Mark N Schoeman, Reme Mountifield, Derrick Tee, Simon P L Travis, Jane M Andrews
BACKGROUND & AIMS: A 'Treat to Target' (T2T) approach has been proposed for ulcerative colitis (UC), with a target of combined clinical and endoscopic remission. The aim of the study was evaluate the extent to which proposed targets are achieved in real-world care, along with clinician perceptions and potential challenges. METHODS: A multicentre, retrospective, cross-sectional review of patients with UC attending outpatient services in South Australia was conducted...
August 14, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28805270/histoplasmosis-in-transplant-recipients
#8
REVIEW
Kiran Gajurel, Reshika Dhakal, Stan Deresinski
Histoplasma capsulatum is a dimorphic fungus that most often causes asymptomatic infection in the immunocompetent population. In immunocompromised patients, including solid organ transplant (SOT) and hematopoietic cell transplant (HCT) recipients, however, it is likely to cause severe life-threatening infection. Post-transplant histoplasmosis (PTH) in SOT is uncommon with an incidence of ≤ 1% and is even rarer in HCT patients. The majority of PTH in SOT is diagnosed in the first 2 years following transplantation...
August 14, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28805130/melan-a-antibody-cross-reactivity-in-molluscum-contagiosum-bodies
#9
David Creytens
No abstract text is available yet for this article.
August 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28804907/allergic-contact-dermatitis-caused-by-isobornyl-acrylate-in-freestyle%C3%A2-libre-a-newly-introduced-glucose-sensor
#10
Anne Herman, Olivier Aerts, Marie Baeck, Magnus Bruze, Christophe De Block, An Goossens, Nils Hamnerius, Sara Huygens, Dominique Maiter, Dominique Tennstedt, Bernard Vandeleene, Martin Mowitz
BACKGROUND: Glucose sensors, such as FreeStyle® Libre, are innovative medical devices developed for diabetes patients as a replacement for classic glucose meters, ensuring continuous glucose monitoring without the disadvantage of regular skin finger pricks. OBJECTIVES: To report several cases of allergic contact dermatitis caused by FreeStyle® Libre, and to report on isobornyl acrylate as a culprit allergen. PATIENTS AND METHODS: Fifteen patients presented with allergic contact dermatitis caused by FreeStyle® Libre...
August 14, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28803712/oral-cholera-vaccine-coverage-in-hard-to-reach-fishermen-communities-after-two-mass-campaigns-malawi-2016
#11
Delphine Sauvageot, Christel Saussier, Abebe Gobeze, Sikhona Chipeta, Innocent Mhango, Gift Kawalazira, Martin A Mengel, Dominique Legros, Philippe Cavailler, Maurice M'bang'ombe
CONTEXT: From December 2015 to August 2016, a large epidemic of cholera affected the fishermen of Lake Chilwa in Malawi. A first reactive Oral Cholera Vaccines (OCV) campaign was organized, in February, in a 2km radius of the lake followed by a preemptive one, conducted in November, in a 25km radius. We present the vaccine coverage reached in hard-to-reach population using simplified delivery strategies. METHOD: We conducted two-stage random-sampling cross-sectional surveys among individuals living in a 2km and 25km radius of Lake Chilwa (islands and floating homes included)...
August 10, 2017: Vaccine
https://www.readbyqxmd.com/read/28803057/cross-reactivity-and-cross-immunomodulation-between-venoms-of-the-snakes-bothrops-asper-crotalus-simus-and-lachesis-stenophrys-and-its-effect-in-the-production-of-polyspecific-antivenom-for-central-america
#12
Cynthia Arroyo, Sergio Solano, Álvaro Segura, María Herrera, Ricardo Estrada, Mauren Villalta, Mariángela Vargas, José María Gutiérrez, Guillermo León
A mixture of the venoms of Bothrops asper, Crotalus simus and Lachesis stenophrys is used as immunogen to produce the polyspecific Central American antivenom (PoliVal-ICP). In this work, we studied the ability of each of these venoms to modulate the antibody response induced by the other two venoms included in the immunization mixture. For that, equine monospecific, bispecific and polyspecific antivenoms were prepared and compared regarding their ability to neutralize the phospholipase A2, coagulant and lethal activities of each venom, and their anti-venom antibodies concentration...
August 9, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28801845/accurate-analytical-method-for-human-plasma-glucagon-levels-using-liquid-chromatography-high-resolution-mass-spectrometry-comparison-with-commercially-available-immunoassays
#13
Atsushi Miyachi, Masaki Kobayashi, Eri Mieno, Moritaka Goto, Kenichi Furusawa, Takashi Inagaki, Tadahiro Kitamura
Accurate quantification of plasma glucagon levels in humans is necessary for understanding the physiological and pathological importance of glucagon. Although several immunoassays for glucagon are available, they provide inconsistent glucagon values owing to cross-reactivity of the antibodies with peptides other than glucagon. To overcome this limitation, we developed a novel method to measure glucagon levels by a liquid chromatography (LC)-high-resolution mass spectrometry (HRMS) assay via parallel reaction monitoring (PRM) without immunoaffinity enrichment...
August 12, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28801713/cross-reactivity-profiles-of-legumes-and-tree-nuts-using-the-xmap-%C3%A2-multiplex-food-allergen-detection-assay
#14
Chung Y Cho, Carolyn Oles, William Nowatzke, Kerry Oliver, Eric A E Garber
The homology between proteins in legumes and tree nuts makes it common for individuals with food allergies to be allergic to multiple legumes and tree nuts. This propensity for allergenic and antigenic cross-reactivity means that commonly employed commercial immunodiagnostic assays (e.g., dipsticks) for the detection of food allergens may not always accurately detect, identify, and quantitate legumes and tree nuts unless additional orthogonal analytical methods or secondary measures of analysis are employed...
August 12, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28801571/crp-level-associated-polymorphism-rs1205-within-the-crp-gene-is-associated-with-2-hour-glucose-level-the-sapphire-study
#15
Wayne Huey-Herng Sheu, Wen-Chang Wang, Kwan-Dun Wu, Chih-Tsueng He, Chii-Min Hwu, Thomas Quertermous, Wan-Shan Hsieh, Wen-Jane Lee, Chih-Tai Ting, Yii-Der I Chen, Chao A Hsiung
C-reactive protein (CRP) encoded by CRP gene is a reflection of systemic inflammation. Many studies associated CRP level with diabetes and glucose levels, but the association of CRP gene with these traits is unclear. We conducted a cross-sectional study consisting of 945 siblings from 330 families collected by the Stanford Asian Pacific Program in Hypertension and Insulin Resistance (SAPPHIRe) to investigate associations between CRP polymorphisms, circulating CRP, diabetes, and glucose levels. Five single-nucleotide polymorphisms were analyzed: rs3093059, rs2794521, rs1417938, rs1800947, and rs1205...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801344/frontline-science-macrophage-derived-exosomes-promote-neutrophil-necroptosis-following-hemorrhagic-shock
#16
Yang Jiao, Zhigang Li, Patricia A Loughran, Erica K Fan, Melanie J Scott, Yuehua Li, Timothy R Billiar, Mark A Wilson, Xueyin Shi, Jie Fan
Hemorrhagic shock (HS) renders patients susceptible to development of systemic inflammatory response syndrome (SIRS) and multiple organ dysfunction syndrome (MODS) through mechanisms that are, as yet, unclear. Cell necroptosis, a form of regulated inflammatory cell death, is one of the mechanisms that controls cell release of inflammatory mediators from innate immune cells, such as polymorphonuclear neutrophils (PMNs), and critically regulates the progress of inflammation. In this study, we investigated the mechanisms of alveolar macrophage (AMϕ) effects on PMN necroptosis following HS...
August 11, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28800704/qualitative-and-quantitative-analysis-of-carbohydrate-modification-on-glycoproteins-from-seeds-of-ginkgo-biloba
#17
Ting Wang, Xiao-Chun Hu, Zhi-Peng Cai, Josef Voglmeir, Li Liu
Recent progress in the relationship between carbohydrate cross-reactive determinants (CCDs) and allergic response highlights the importance of carbohydrate moieties in innate immune system. A previous research pointed out that the protein allergen in Ginkgo biloba seeds are glycosylated and the oligosaccharides conjugated to these proteins might also contribute to the allergy. The aim of this study was to analyze carbohydrate moieties, especially the N-linked glycans, of glycoproteins from Ginkgo seeds originated from different places for detailed structures, to enable further research on the roles that N-glycans play in Ginkgo-caused allergy...
August 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28800601/sequence-homology-between-hla-bound-cytomegalovirus-and-human-peptides-a-potential-trigger-for-alloreactivity
#18
Charles E Hall, Vishal N Koparde, Maximilian Jameson-Lee, Abdelrhman G Elnasseh, Allison F Scalora, David J Kobulnicky, Myrna G Serrano, Catherine H Roberts, Gregory A Buck, Michael C Neale, Daniel E Nixon, Amir A Toor
Human cytomegalovirus (hCMV) reactivation may often coincide with the development of graft-versus-host-disease (GVHD) in stem cell transplantation (SCT). Seventy seven SCT donor-recipient pairs (DRP) (HLA matched unrelated donor (MUD), n = 50; matched related donor (MRD), n = 27) underwent whole exome sequencing to identify single nucleotide polymorphisms (SNPs) generating alloreactive peptide libraries for each DRP (9-mer peptide-HLA complexes); Human CMV CROSS (Cross-Reactive Open Source Sequence) database was compiled from NCBI; HLA class I binding affinity for each DRPs HLA was calculated by NetMHCpan 2...
2017: PloS One
https://www.readbyqxmd.com/read/28800407/human-brown-adipose-tissue-function-and-therapeutic-potential-in-metabolic-disease
#19
REVIEW
Padmanabh Shrikant Bhatt, Waljit S Dhillo, Victoria Salem
There has been a resurgence of interest in brown adipose tissue (BAT) over the last decade. Key to this has been our ability to accurately image it, which has improved significantly. The role of BAT in regulating energy expenditure is important, and its pharmacological manipulation may hold therapeutic potential in metabolic disease. There is ample evidence of BAT activation by cold exposure, and pharmacological utilisation of similar pathways, using B3 receptor agonists holds promise since the development of selective agonists with limited cross-reactivity has rekindled interest...
August 8, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28799434/metabolic-biomarkers-and-gallstone-disease-a-population-based-study
#20
Daniel Mønsted Shabanzadeh, Tea Skaaby, Lars Tue Sørensen, Jesper Eugen-Olsen, Torben Jørgensen
OBJECTIVES: The objectives for this study were to examine the associations between metabolic biomarkers of obesity including insulin resistance, vascular dysfunction, systemic inflammation, genetic susceptibility and ultrasound proven gallstone disease or cholecystectomy in a population-based cross-sectional study. MATERIAL AND METHODS: A total of 2650 participants were included, of whom 422 had gallstone disease. Associations between selected metabolic biomarkers and gallstone disease were estimated by multivariable logistic regression models and expressed as odds ratio (OR) and 95% confidence interval (CI)...
August 11, 2017: Scandinavian Journal of Gastroenterology
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