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https://www.readbyqxmd.com/read/28749622/understanding-and-challenges-in-taking-tyrosine-kinase-inhibitors-among-malaysian-chronic-myeloid-leukemia-patients-a-qualitative-study
#1
Yik Ming Lim, Wei Lerk Eng, Huan Keat Chan
Background: In Malaysia, the treatment for chronic myeloid leukemia (CML) has long been delivered under the Malaysian Patient Assistance Program (MYPAP), but research on identifying factors contributing to non-adherence to tyrosine kinase inhibitors (TKIs) is still limited. The current study explored understanding and challenges of Malaysian CML patients in taking imatinib and nilotinib. Methods: Semi-structured, face-to-face interviews were conducted with 13 CML patients receiving treatment at a public tertiary care center, and were analyzed using the content analysis approach...
July 27, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28749609/ricochet-pollination-in-senna-fabaceae-petals-deflect-pollen-jets-and-promote-division-of-labour-among-flower-organs
#2
Thiago Amorim, Brigitte Marazzi, Arlete A Soares, Eliana R Forni-Martins, Celli R Muniz, Christian Westerkamp
Naturalists Fritz and Hermann Müller hypothesised that heteranthery often leads to a division of labour into 'feeding' and 'pollinating' stamens; the latter often being as long as the pistil so as to promote successful pollination on the bees' back. In many buzz-pollinated species of Senna, however, the so-called pollinating stamens are short and do not level with the stigma, raising the question of how pollen is shed on the bees' back. Here we explore a mechanism called "ricochet pollination". We test whether division of labour is achieved through the interaction between short lower stamens and strongly concave "deflector petals"...
July 27, 2017: Plant Biology
https://www.readbyqxmd.com/read/28749606/perceived-stress-is-associated-with-increased-rostral-middle-frontal-gyrus-cortical-thickness-a-family-based-and-discordant-sibling-investigation
#3
L J Michalski, C H Demers, D A A Baranger, D M Barch, M P Harms, G C Burgess, R Bogdan
BACKGROUND: Elevated stress perception and depression commonly co-occur, suggesting that they share a common neurobiology. Cortical thickness of the rostral middle frontal gyrus (RMFG), a region critical for executive function, has been associated with depression- and stress-related phenotypes. Here, we examined whether RMFG cortical thickness is associated with these phenotypes in a large family-based community sample. METHODS: RMFG cortical thickness was estimated using FreeSurfer among participants (n=879) who completed the ongoing Human Connectome Project...
July 27, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/28749599/heat-induced-inflammation-and-its-role-in-esophageal-cancer
#4
REVIEW
Mohaddese Maghsudlu, Ehsan Farashahi Yazd
Esophageal cancer as the sixth common cause of cancer death in the world consists of different histological types with various incidence patterns. Among them, esophageal adenocarcinoma and esophageal squamous cell carcinoma are the most prevalent types which also have different causality, cell of origin and risk factors. Since epidemiological studies have announced consumption of hot substances as one of the major risk factors for squamous cell carcinoma, evaluating the effect of this external stress on esophagus cells seems desirable...
July 27, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28749597/a-structural-model-of-nitro-porphyrin-dyes-based-on-spectroscopy-and-density-functional-theory
#5
Christopher Farley, Amit Aggarwal, Sunaina Singh, Aaron Dolor, Philip To, Alexander Falber, Maxwell Crossley, Charles Michael Drain
Nitro-porphyrins are an important class of commercial dyes with a range of potential applications. The nitro group is known to dramatically affect the photophysics of the porphyrin, but there are few systematic investigations of the contributing factors. To address this deficiency, we present spectroscopic studies of a series of nitro-porphyrins, accompanied by density functional theory calculations to elucidate their structures. In particular, we explore how the positions of the substituents affect the energy levels and nuclear geometry...
July 27, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28749585/mir3954-is-a-trigger-of-phasirnas-that-affects-flowering-time-in-citrus
#6
Yuanlong Liu, Lili Ke, Guizhi Wu, Yuantao Xu, Xiaomeng Wu, Rui Xia, Xiuxin Deng, Qiang Xu
In plant, a few 22 nt miRNAs direct cleavages of their targets and trigger the biogenesis of phased small interfering RNAs (phasiRNAs) in plant. In this study, we characterized a miRNA triggering phasiRNAs generation, miR3954, and explored its downstream target genes and potential function. Our results demonstrated that miR3954 showed specific expression in the flowers of citrus species and it targeted a NAC transcription factor (Cs7g22460) and two non-coding RNA transcripts (lncRNAs, Cs1g09600 and Cs1g09635)...
July 27, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28749583/chiral-sulfur-functional-groups-as-definers-of-the-chirality-at-the-metal-in-ir-and-rh-half-sandwich-complexes-a-combined-cd-x-ray-study
#7
Miguel A Sierra, Maria C de la Torre, Roberto Fernandez de la Pradilla, Alma Viso, Maria Frutos, Marta G Avello, Marina Velado, Heinz Gornitzka, Catherine Hemmert
Mesoionic carbenes (MIC) derived from triazolium salts containing chiral sulfoxide or sulfoximine functional groups lead to enantiopure chiral-at-metal Ir(III) and Rh(III) half-sandwich complexes, through the sequence MIC complexation-C-H aromatic activation. The process is efficient and totally diastereoselective in the formation of enantiopure five membered metallacycles. The use of the enantiomers of the sulfur chiral groups allows to prepare complexes having opposite configurations at the metal. Complete retention of the configuration at the metal center is observed during the formation of cationic Ir(III) complexes and upon insertion of alkynes into the Ir(III)-C bond, as demonstrated by a combined Circular Dichroism (CD)-X-ray study...
July 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28749579/a-new-type-of-neurons-for-machine-learning
#8
Fenglei Fan, Wenxiang Cong, Ge Wang
In machine learning, the use of an artificial neural network is the mainstream approach. Such a network consists of layers of neurons. These neurons are of the same type characterized by the two features: (1) an inner product of an input vector and a matching weighting vector of trainable parameters and (2) a nonlinear excitation function. Here we investigate the possibility of replacing the inner product with a quadratic function of the input vector, thereby upgrading the 1(st) order neuron to the 2(nd) order neuron, empowering individual neurons, and facilitating the optimization of neural networks...
July 27, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28749573/il-6-stat3-signaling-as-a-promising-target-to-improve-the-efficacy-of-cancer-immunotherapy
#9
REVIEW
Hidemitsu Kitamura, Yosuke Ohno, Yujiro Toyoshima, Junya Ohtake, Shigenori Homma, Hideki Kawamura, Norihiko Takahashi, Akinobu Taketomi
Overcoming the immunosuppressive state in tumor microenvironments is a critical issue to improve the efficacy of cancer immunotherapy. Interleukin (IL)-6, a pleiotropic cytokine, is highly produced in the tumor-bearing host. Previous studies have indicated that IL-6 suppresses the antigen presentation ability of dendritic cells (DCs) through activation of signal transducer and activator of transcription 3 (STAT3). Thus, we focused on the precise effect of the IL-6/STAT3 signaling cascade on human DCs and the subsequent induction of antitumor T cell immune responses...
July 27, 2017: Cancer Science
https://www.readbyqxmd.com/read/28749571/l-ornithine-l-aspartate-in-bouts-of-overt-hepatic-encephalopathy
#10
Sandeep Singh Sidhu, Barjesh Chander Sharma, Omesh Goyal, Harsh Kishore, Navpreet Kaur
High quality data on efficacy of L-Ornithine L-Aspartate (LOLA) in cirrhotics with bouts of overt hepatic encephalopathy (OHE) is missing. We aimed to evaluate the efficacy of intravenous LOLA in reversal of bouts of OHE in cirrhotics. In this prospective double-blind randomized placebo controlled trial conducted at two tertiary care institutes in India, 370 cirrhotics with bouts of OHE were screened. After exclusion, 193 (52.16%) patients were randomized to receive either intravenous infusions of LOLA (n=98), 30 grams daily or Placebo (n=95) for 5 days...
July 27, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28749565/melatonin-suppresses-platelet-activation-and-function-against-cardiac-ischemia-reperfusion-injury-via-ppar%C3%AE-fundc1-mitophagy-pathways
#11
Hao Zhou, Dandan Li, Pingjun Zhu, Shunying Hu, Nan Hu, Sai Ma, Ying Zhang, Tianwen Han, Jun Ren, Feng Cao, Yundai Chen
Platelet activation is a major (patho-) physiological mechanism that underlies ischemia/reperfusion (I/R) injury. In this study, we explored the molecular signals for platelet hyperactivity and investigated the beneficial effects of melatonin on platelet reactivity in response to I/R injury. After reperfusion, peroxisome proliferator-activated receptor γ (PPARγ) was progressively downregulated in patients with acute myocardial infarction undergoing coronary artery bypass grafting (CABG) surgery and in mice with I/R injury model...
July 27, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28749554/high-energy-resolution-x-ray-absorption-spectroscopy-for-identification-of-reactive-surface-species-on-supported-single-site-iridium-catalysts
#12
Adam S Hoffman, Dimosthenis Sokaras, Shengjie Zhang, Louise M Debefve, Chia-Yu Fang, Alessandro Gallo, Thomas Kroll, David A Dixon, Simon R Bare, Bruce C Gates
We report high-energy-resolution X-ray absorption spectroscopy detection of ethylene and CO ligands adsorbed on catalytically active iridium centers isolated on zeolite HY and on MgO supports. The data are supported by density functional theory and FEFF X-ray absorption near-edge modelling, together with infrared (IR) spectra. The results demonstrate that high-energy-resolution X-ray absorption spectra near the iridium LIII (2p3/2 ) edge provide clearly ascribable, distinctive signatures of the ethylene and CO ligands and illustrate effects of supports and other ligands...
June 9, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28749552/the-eigenvalue-problem-in-phase-space
#13
Leon Cohen
We formulate the standard quantum mechanical eigenvalue problem in quantum phase space. The equation obtained involves the c-function that corresponds to the quantum operator. We use the Wigner distribution for the phase space function. We argue that the phase space eigenvalue equation obtained has, in addition to the proper solutions, improper solutions. That is, solutions for which no wave function exists which could generate the distribution. We discuss the conditions for ascertaining whether a position momentum function is a proper phase space distribution...
July 27, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28749550/combined-resistance-and-endurance-training-at-a-moderate-high-intensity-improves-physical-condition-and-quality-of-life-in-liver-transplant-patients
#14
Diego Moya-Nájera, Ángel Moya-Herraiz, Luis Compte-Torrero, David Hervás, Sebastien Borreani, Joaquin Calatayud, Marina Berenguer, Juan C Colado
BACKGROUND: Although currently, moderate and high intensity concurrent physical exercise is prescribed in populations with special needs due to its greater effect on physical condition and health-related quality of life (HRQOL), there are no data in the liver transplantation (LT) setting. AIM: To evaluate changes in maximal strength, aerobic capacity, body composition, liver function, and HRQOL in LT patients after a moderate to high intensity combined resistance-endurance training...
July 27, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28749544/combined-eeg-fmri-and-esi-improves-localisation-of-paediatric-focal-epilepsy
#15
Maria Centeno, Tim M Tierney, Suejen Perani, Elhum A Shamshiri, Kelly StPier, Charlotte Wilkinson, Daniel Konn, Serge Vulliemoz, Frédéric Grouiller, Louis Lemieux, Ronit M Pressler, Christopher A Clark, J Helen Cross, David W Carmichael
Objective Surgical treatment in epilepsy is effective if the epileptogenic zone (EZ) can be correctly localized and characterized. Here we use simultaneous Electroencephalography-functional MRI (EEG-fMRI) data to derive EEG-fMRI and Electrical Source Imaging (ESI) maps. Their yield and their individual and combined ability to 1) localize the epileptogenic zone and 2) predict seizure outcome was then evaluated. Methods Fifty-three children with drug-resistant epilepsy underwent EEG-fMRI. Interictal discharges were mapped using both EEG-fMRI haemodynamic responses and Electrical Source Imaging (ESI)...
July 27, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28749543/new-multi-responsive-chromic-soft-materials-dynamic-interconversion-of-short-2-7-dicyanomethylenecarbazole-based-biradicaloid-and-corresponding-cyclophane-tetramer
#16
Maria Carmen Ruiz Delgado, Deliang Wang, Cristina Capel Ferrón, Jie Li, Sergio Gámez-Valenzuela, Rocio Ponce Ortiz, Juan T López Navarrete, Víctor Hernández Jolin, Xiaodi Yang, Miriam Peña Álvarez, Valentín García Baonza, František Hartl, Hongxiang Li
Herein, we report a quinodimethane-type molecule, 2,7-dicyanomethylene-9-(2-ethylhexyl)carbazole (1), one of the shortest π-conjugated biradicaloids reported to be stable in solution at ambient. This carbazole-based quinoidal precursor is able to form a macrocyclic -bonded tetramer (2). The resolved single crystal X-ray structure of tetramer 2 shows that four molecules of 1 are linked together through four long (CN)2C-C(CN)2 bonds (1.631 Å) resulting from coupling of the unpaired electrons in biradicaloid 1...
July 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28749541/dynamic-covalent-bond-from-first-principles-diarylbibenzofuranone-structural-electronic-and-oxidation-studies
#17
Gabriel R Schleder, Adalberto Fazzio, Jeverson T Arantes
A structure that can self-heal under standard conditions is a challenge faced nowadays and is one of the most promising areas in smart materials science. This can be achieved by dynamic bonds, of which diarylbibenzofuranone (DABBF) dynamic covalent bond is an appealing solution. In this report, we studied the DABBF bond formation against arylbenzofuranone (ABF) and O2 reaction (autoxidation). Our results show that the barrierless DABBF bond formation is preferred over autoxidation due to the charge transfer process that results in the weakly bonded superoxide...
July 27, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28749537/sodium-channels-and-pain-from-toxins-to-therapies
#18
REVIEW
Fernanda C Cardoso, Richard J Lewis
Voltage-gated sodium channels (NaV ) are essential to initiation and propagation of action potentials that critically influence our ability to respond to a diverse range of stimuli. Physiological and pharmacological studies have linked abnormal function of Nav channels to many human disorders, including chronic neuropathic pain. These findings, along with the description of the functional properties and expression pattern of NaV channels subtypes, are helping to uncover subtype specific roles in acute and chronic pain, and revealing potential opportunities to target these with selective inhibitors...
July 27, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28749533/charmm-force-field-and-molecular-dynamics-simulations-of-protonated-polyethylenimine
#19
Titus Adrian Beu, Alexandra Farcaş
As a gene delivery vector, polyethylenimine (PEI) shows one of the highest transfection efficiencies, while effectively protecting DNA from enzyme degradation. The distinctive charge pattern of protonated PEI is widely considered responsible for fundamental process such as DNA condensation into PEI/DNA polyplexes (which are able to enter cells via endocytosis), proton sponge effect (which triggers the release of polyplexes from endosome), and release of DNA from polyplexes (to be further processed inside the nucleus)...
July 27, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28749532/contracted-schr%C3%A3-dinger-equation-in-quantum-phase-space
#20
Carol Frishberg, Leon Cohen
The phase space formulation of quantum mechanics is equivalent to standard quantum mechanics where averages are calculated by way of phase space integration as in the case of classical statistical mechanics. We derive the quantum hierarchy equations, often called the contracted Schrödinger equation, in the phase space representation of quantum mechanics which involves quasi-distributions of position and momentum. We use the Wigner distribution for the phase space function and the Moyal phase space eigenvalue formulation to derive the hierarchy...
July 27, 2017: Journal of Computational Chemistry
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