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https://www.readbyqxmd.com/read/29451345/unsymmetrical-cyclic-diborenes-and-thermal-rearrangement-to-a-borylborylene
#1
Tom Stennett, James Mattock, Ivonne Vollert, Alfredo Vargas, Holger Braunschweig
Cyclic diboranes(4) based on a chelating monoanionic benzylphosphine linker were prepared by boron-silicon exchange between arylsilanes and B2Br4. Coordination of Lewis bases to the remaining sp2 boron atom yielded unsymmetrical sp3-sp3 diboranes, which were reduced with KC8 to their corresponding trans-diborenes. These compounds were studied by a combination of spectroscopic methods, X-ray diffraction and DFT calculations. PMe3-stabilized diborene 6 was found to undergo thermal rearrangement to gem-diborene 8...
February 16, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29451296/investigation-of-the-urinary-metabolic-variations-and-the-application-in-bladder-cancer-biomarker-discovery
#2
Xiaoyan Liu, Xiangming Cheng, Xiang Liu, Lu He, Wenli Zhang, Yajie Wang, Wei Sun, Zhigang Ji
Urine metabolomics have been used to identify biomarkers for clinical diseases. However, inter-individual variations and effect factors need to be further evaluated. In the present study, we explored the urine metabolome in a cohort of 203 health adults, 6 patients with benign bladder lesions, and 53 patients with bladder cancer (BCa) using liquid chromatography coupled with high resolution mass spectrometry. Inter-individual analysis of both healthy controls and bladder cancer patients showed that the urine metabolome was relatively stable...
February 16, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29450800/the-endogenous-subcellular-localisations-of-the-long-chain-fatty-acid-activating-enzymes-acsl3-and-acsl4-in-sarcoma-and-breast-cancer-cells
#3
Yassmeen Radif, Haarith Ndiaye, Vasiliki Kalantzi, Ruth Jacobs, Andrew Hall, Shane Minogue, Mark G Waugh
Fatty acid uptake and metabolism are often dysregulated in cancer cells. Fatty acid activation is a critical step that allows these biomolecules to enter cellular metabolic pathways such as mitochondrial β-oxidation for ATP generation or the lipogenic routes that generate bioactive lipids such as the inositol phospholipids. Fatty acid activation by the addition of coenzyme A is catalysed by a family of enzymes called the acyl CoA synthetase ligases (ACSL). Furthermore, enhanced expression of particular ACSL isoforms, such as ACSL4, is a feature of some more aggressive cancers and may contribute to the oncogenic phenotype...
February 15, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29450619/immediate-response-mechanisms-of-gram-negative-solvent-tolerant-bacteria-to-cope-with-environmental-stress-cis-trans-isomerization-of-unsaturated-fatty-acids-and-outer-membrane-vesicle-secretion
#4
REVIEW
Christian Eberlein, Thomas Baumgarten, Stephan Starke, Hermann J Heipieper
Bacteria have evolved an array of adaptive mechanisms enabling them to survive and grow in the presence of different environmental stresses. These mechanisms include either modifications of the membrane or changes in the overall energy status, cell morphology, and cell surface properties. Long-term adaptations are dependent on transcriptional regulation, the induction of anabolic pathways, and cell growth. However, to survive sudden environmental changes, bacterial short-term responses are essential to keep the cells alive after the occurrence of an environmental stress factor such as heat shock or the presence of toxic organic solvents...
February 15, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29450252/alcohol-and-tobacco-use-among-methadone-maintenance-patients-in-vietnamese-rural-mountainside-areas
#5
Bach Xuan Tran, Huong Lan Thi Nguyen, Quynh Ngoc Hoang Le, Hue Thi Mai, Chau Ngo, Canh Dinh Hoang, Hai Hong Nguyen, Hai Quan Le, Hung Van Nguyen, Huong Thi Le, Tho Dinh Tran, Nabil Zary, Carl A Latkin, Thuc Minh Thi Vu, Roger C M Ho, Melvyn W B Zhang
Introduction: The expansion of methadone maintenance treatment (MMT) program requires more data about the factors affecting the effectiveness of treatment, especially behavioral data such as smoking and alcohol use among patients. This study aimed to examine the prevalence of tobacco and alcohol consumption and identify related factors among MMT patients in the Vietnamese rural mountainside. Methods: We interviewed 241 MMT patients in two clinics in Tuyen Quang, a mountainous province in Vietnam...
June 2018: Addictive Behaviors Reports
https://www.readbyqxmd.com/read/29450235/vietnamese-validation-of-the-short-version-of-internet-addiction-test
#6
Bach Xuan Tran, Hue Thi Mai, Long Hoang Nguyen, Cuong Tat Nguyen, Carl A Latkin, Melvyn W B Zhang, Roger C M Ho
Background and aims: The main goal of the present study was to examine the psychometric properties of a Vietnamese version of the short-version of Internet Addiction Test (s-IAT) and to assess the relationship between s-IAT scores and demographics, health related qualify of life and perceived stress scores in young Vietnamese. Methods: The Vietnamese version of s-IAT was administered to a sample of 589 participants. Exploratory factor and reliability analyses were performed...
December 2017: Addictive Behaviors Reports
https://www.readbyqxmd.com/read/29449822/attachment-patterns-and-complex-trauma-in-a-sample-of-adults-diagnosed-with-gender-dysphoria
#7
Guido Giovanardi, Roberto Vitelli, Carola Maggiora Vergano, Alexandro Fortunato, Luca Chianura, Vittorio Lingiardi, Anna Maria Speranza
The current study investigated attachment representations and complex trauma in a sample of gender dysphoric adults. Although it has been proven that the psychological wellbeing of gender diverse persons is largely mediated by family acceptance and support, research on their relationships with parental figures is scarce. A total of 95 adults took part in the study. The attachment distribution was as follows: 27% secure, 27% insecure and 46% disorganized. Regarding early traumas, 56% experienced four or more traumatic forms...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29449751/betweenness-and-diversity-in-journal-citation-networks-as-measures-of-interdisciplinarity-a-tribute-to-eugene-garfield
#8
Loet Leydesdorff, Caroline S Wagner, Lutz Bornmann
Journals were central to Eugene Garfield's research interests. Among other things, journals are considered as units of analysis for bibliographic databases such as the Web of Science and Scopus. In addition to providing a basis for disciplinary classifications of journals, journal citation patterns span networks across boundaries to variable extents. Using betweenness centrality (BC) and diversity, we elaborate on the question of how to distinguish and rank journals in terms of interdisciplinarity. Interdisciplinarity, however, is difficult to operationalize in the absence of an operational definition of disciplines; the diversity of a unit of analysis is sample-dependent...
2018: Scientometrics
https://www.readbyqxmd.com/read/29449522/-endoscopic-trans-ventricular-approach-for-the-treatment-of-symptomatic-suprasellar-arachnoid-cyst-a-case-report
#9
Kunio Yokoyama, Masahiro Kawanishi, Yutaka Ito, Makoto Yamada, Hidekazu Tanaka, Masashi Yamashita, Akira Sugie, Yoji Tamura, Toshihiko Kuroiwa
No abstract text is available yet for this article.
February 2018: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/29449511/crispr-cas12a-target-binding-unleashes-indiscriminate-single-stranded-dnase-activity
#10
Janice S Chen, Enbo Ma, Lucas B Harrington, Maria Da Costa, Xinran Tian, Joel M Palefsky, Jennifer A Doudna
CRISPR-Cas12a (Cpf1) proteins are RNA-guided enzymes that bind and cut DNA as components of bacterial adaptive immune systems. Like CRISPR-Cas9, Cas12a has been harnessed for genome editing based on its ability to generate targeted, double-stranded DNA (dsDNA) breaks. Here we show that RNA-guided DNA binding unleashes indiscriminate single-stranded DNA (ssDNA) cleavage activity by Cas12a that completely degrades ssDNA molecules. We find that target-activated, non-specific ssDNase cleavage is also a property of other type V CRISPR-Cas12 enzymes...
February 15, 2018: Science
https://www.readbyqxmd.com/read/29449453/conserved-and-divergent-features-of-human-and-mouse-kidney-organogenesis
#11
Nils O Lindström, Jill A McMahon, Jinjin Guo, Tracy Tran, Qiuyu Guo, Elisabeth Rutledge, Riana K Parvez, Gohar Saribekyan, Robert E Schuler, Christopher Liao, Albert D Kim, Ahmed Abdelhalim, Seth W Ruffins, Matthew E Thornton, Laurence Basking, Brendan Grubbs, Carl Kesselman, Andrew P McMahon
Human kidney function is underpinned by approximately 1,000,000 nephrons, although the number varies substantially, and low nephron number is linked to disease. Human kidney development initiates around 4 weeks of gestation and ends around 34-37 weeks of gestation. Over this period, a reiterative inductive process establishes the nephron complement. Studies have provided insightful anatomic descriptions of human kidney development, but the limited histologic views are not readily accessible to a broad audience...
February 15, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29449451/conserved-and-divergent-molecular-and-anatomic-features-of-human-and-mouse-nephron-patterning
#12
Nils O Lindström, Tracy Tran, Jinjin Guo, Elisabeth Rutledge, Riana K Parvez, Matthew E Thornton, Brendan Grubbs, Jill A McMahon, Andrew P McMahon
The nephron is the functional unit of the kidney, but the mechanism of nephron formation during human development is unclear. We conducted a detailed analysis of nephron development in humans and mice by immunolabeling, and we compared human and mouse nephron patterning to describe conserved and divergent features. We created protein localization maps that highlight the emerging patterns along the proximal-distal axis of the developing nephron and benchmark expectations for localization of functionally important transcription factors, which revealed unanticipated cellular diversity...
February 15, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29449449/conserved-and-divergent-features-of-mesenchymal-progenitor-cell-types-within-the-cortical-nephrogenic-niche-of-the-human-and-mouse-kidney
#13
Nils O Lindström, Jinjin Guo, Albert D Kim, Tracy Tran, Qiuyu Guo, Guilherme De Sena Brandine, Andrew Ransick, Riana K Parvez, Matthew E Thornton, Laurence Basking, Brendan Grubbs, Jill A McMahon, Andrew D Smith, Andrew P McMahon
Cellular interactions among nephron, interstitial, and collecting duct progenitors drive mammalian kidney development. In mice, Six2 + nephron progenitor cells (NPCs) and Foxd1 + interstitial progenitor cells (IPCs) form largely distinct lineage compartments at the onset of metanephric kidney development. Here, we used the method for analyzing RNA following intracellular sorting (MARIS) approach, single-cell transcriptional profiling, in situ hybridization, and immunolabeling to characterize the presumptive NPC and IPC compartments of the developing human kidney...
February 15, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29449125/enhancing-the-anti-biofilm-activity-of-5-aryl-2-aminoimidazoles-through-nature-inspired-dimerisation
#14
Tran Thi Thu Trang, Lise Dieltjens, Geert Hooyberghs, Kai Waldrant, Denis S Ermolat'ev, Erik V Van der Eycken, Hans P L Steenackers
The increased tolerance of biofilms against disinfectants and antibiotics has stimulated research into new methods of biofilm prevention and eradication. In our previous work, we have identified the 5-aryl-2-aminoimidazole core as a scaffold that demonstrates preventive activity against biofilm formation of a broad range of bacterial and fungal species. Inspired by the dimeric nature of natural 2-aminoimidazoles of the oroidin family, we investigated the potential of dimers of our decorated 5-aryl-2-aminoimidazoles as biofilm inhibitors...
January 31, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29448799/vibrational-treatment-of-the-formic-acid-double-minimum-case-in-valence-coordinates
#15
Falk Richter, P Carbonnière
One single full dimensional valence coordinate HCOOH ground state potential energy surface accurate for both cis and trans conformers for all levels up to 6000 cm -1 relative to trans zero point energy has been generated at CCSD(T)-F12a/aug-cc-pVTZ level. The fundamentals and a set of eigenfunctions complete up to about 3120 and 2660 cm -1 for trans- and cis-HCOOH, respectively, have been calculated and assigned using the improved relaxation method of the Heidelberg multi-configuration time-dependent Hartree package and an exact expression for the kinetic energy in valence coordinates generated by the TANA program...
February 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29448598/effect-of-porous-structure-and-acidity-of-zsm-5-sba-15-catalyst-on-1-3-5-triisopropylbenzene-cracking-catalytic-activity
#16
Tran Quang Vinh, Le Thi Hoai Nam, Nguyen Thi Nhiem, Pham Minh Duc, Nguyen Thi Thu Trang, Do Trung Hieu
ZSM-5/SBA-15 composite materials with different acidities and mesoporous system formations were successfully synthesized by three-step method. The catalysts were characterized by XRD, HR-TEM, BET, EDX and TPD-NH3 methods. It showed that the Si/Al molar ratio had effect on the formation and property of materials. Among synthesized catalysts with the different Si/Al molar ratios of 30 (HZSC-30), 50 (HZSC-50), 70 (HZSC-70), HZSC-50 catalyst had better mesoporous system formation and acidity. These properties helped this catalyst to have higher catalytic activity in 1,3,5-triisopropylbenzene cracking reaction than other studied catalysts in term of higher benzene product yield...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448500/morphological-feature-of-pluronic-f127-and-its-application-in-burn-treatment
#17
Tran Huu Dung, Le Thu Huong, Hoon Yoo
The morphological features of pluronic F127 at various concentrations were investigated and 20% aqueous pluronic F127 solution was chosen for the preparation of biomembrane. The pluronic solution was mixed with appropriate concentration of excipients such as PVA, Povidon S630, PG, Nipagin, Neomycin and Panthenol. The prepared pluronic F127 was thermosensitive, a liquid phase at low temperatures (≤10 °C) but converting into gel at temperatures above 20 °C, and formed stable biomembrane at 37 °C. The neomycin impregnated pluronic membrane suppressed the bacterial growth on agar plate by the sustained release of neomycin...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29447503/the-effects-of-all-trans-retinoic-acid-on-estrogen-receptor-signaling-in-the-estrogen-sensitive-mcf-bus-subline
#18
Ignacio Miro Estruch, Laura H J de Haan, Diana Melchers, René Houtman, Jochem Louisse, John P Groten, Ivonne M C M Rietjens
Estrogen receptor alpha (ERα) and retinoic acid receptors (RARs) play important and opposite roles in breast cancer growth. While exposure to ERα agonists such as 17β-estradiol (E 2 ) is related to proliferation, RAR agonists such as all-trans retinoic acid (AtRA) induce anti-proliferative effects. Although crosstalk between these pathways has been proposed, the molecular mechanisms underlying this interplay are still not completely unraveled. The aim of this study was to evaluate the effects of AtRA on ERα-mediated signaling in the ERα positive cell lines MCF7/BUS and U2OS-ERα-Luc to investigate some of the possible underlying modes of action...
February 15, 2018: Journal of Receptor and Signal Transduction Research
https://www.readbyqxmd.com/read/29447344/the-balance-between-short-term-and-long-term-outcomes-of-bilateral-internal-thoracic-artery-skeletonization-in-coronary-artery-bypass-surgery-a-propensity-matched-cohort-study
#19
Janet M C Ngu, Ming Hao Guo, David Glineur, Diem Tran, Fraser D Rubens
OBJECTIVES: There is growing interest in the use of bilateral internal thoracic arteries (BITAs) for myocardial revascularization. This study sought to compare the balance between early benefits and long-term outcomes of skeletonized or non-skeletonized conduits and to determine whether differences in outcomes are affected by other patient risk factors. METHODS: BITAs were used in 1504 cases with either SK or NSK conduits. Propensity matching was completed using 22 covariates identifying 441 pairs of patients...
February 13, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29447230/propofol-induces-a-metabolic-switch-to-glycolysis-and-cell-death-in-a-mitochondrial-electron-transport-chain-dependent-manner
#20
Chisato Sumi, Akihisa Okamoto, Hiromasa Tanaka, Kenichiro Nishi, Munenori Kusunoki, Tomohiro Shoji, Takeo Uba, Yoshiyuki Matsuo, Takehiko Adachi, Jun-Ichi Hayashi, Keizo Takenaga, Kiichi Hirota
The intravenous anesthetic propofol (2,6-diisopropylphenol) has been used for the induction and maintenance of anesthesia and sedation in critical patient care. However, the rare but severe complication propofol infusion syndrome (PRIS) can occur, especially in patients receiving high doses of propofol for prolonged periods. In vivo and in vitro evidence suggests that the propofol toxicity is related to the impaired mitochondrial function. However, underlying molecular mechanisms remain unknown. Therefore, we investigated effects of propofol on cell metabolism and death using a series of established cell lines of various origins, including neurons, myocytes, and trans-mitochondrial cybrids, with defined mitochondrial DNA deficits...
2018: PloS One
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