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https://www.readbyqxmd.com/read/28644915/mechanistic-insights-on-the-reduction-of-co2-to-silylformates-catalyzed-by-ir-nsin-species
#1
Luis A Oro, Alejandro Julián, Jefferson Guzmán, E A Jaseer, Francisco Fernández-Alvarez, Raquel Royo, Victor Polo, María Pilar García Orduña, Fernando Lahoz
The hydrosilylation of CO2 with different silanes such as HSiEt3, HSiMe2Ph, HSiMePh2, HSiMe(OSiMe3)2 and HSi(OSiMe3)3 in presence of catalytic ammounts of the iridium(III) complex [Ir(H)(CF3CO2)(NSiN*)(coe)] (1; NSiN* = fac-bis-(4-methylpyridine-2-yloxy); coe = cis-cyclooctene) has been comparatively studied. The activity of the hydrosilylation catalytic system based on 1 depends on the nature of the reducing agent, where HSiMe(OSiMe3)2 has proven to be the most active. The aforementioned reactions were found to be highly selective to the formation of the corresponding silylformate...
June 23, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28644776/eye-injuries-in-high-school-and-collegiate-athletes
#2
Barry P Boden, Lauren A Pierpoint, Rebecca G Boden, R Dawn Comstock, Zachary Y Kerr
BACKGROUND: Although eye injuries constitute a small percentage of high school and college sports injuries, they have the potential to be permanently debilitating. HYPOTHESIS: Eye injury rates will vary by sport, sex, and between the high school and college age groups. STUDY DESIGN: Descriptive epidemiology study. LEVEL OF EVIDENCE: Level 3. METHODS: Data from eye injury reports in high school and college athletes were obtained from the National High School Sports-Related Injury Surveillance System, High School Reporting Information Online (HS RIO) database over a 10-year span (2005-2006 through 2014-2015 school years) and the National Collegiate Athletic Association (NCAA) Injury Surveillance Program (ISP) over an 11-year span (2004-2005 through 2014-2015 school years)...
June 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28644529/reciprocal-cooperation-of-phytochemicals-and-micronutrients-against-typical-and-atypical-forms-of-borrelia-spp
#3
Anna Goc, Alexandra Niedzwiecki, Matthias Rath
AIMS: Borrelia spp., a causative pathogenic factor of Lyme disease, has become a major public health threat. Current treatments based on antibiotics often lead to relapse after their withdrawal. Naturally derived substances that could work synergistically to display higher efficacy compared to the individual components may serve as a resource for the development of novel approaches to combat both active and latent forms of Borrelia spp. METHODS AND RESULTS: Using checkerboard assay, we investigated the anti-borreliae reciprocal cooperation of phytochemicals and micronutrients against two species of Borrelia selected as prevalent causes of Lyme disease in the US and Europe...
June 23, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28644485/probing-the-early-stages-of-photoreception-in-photoactive-yellow-protein-with-ultrafast-time-domain-raman-spectroscopy
#4
Hikaru Kuramochi, Satoshi Takeuchi, Kento Yonezawa, Hironari Kamikubo, Mikio Kataoka, Tahei Tahara
Unveiling the nuclear motions of photoreceptor proteins in action is a crucial goal in protein science in order to understand their elaborate mechanisms and how they achieve optimal selectivity and efficiency. Previous studies have provided detailed information on the structures of intermediates that appear during the later stages (>ns) of such photoreception cycles, yet the initial events immediately after photoabsorption remain unclear because of experimental challenges in monitoring nuclear rearrangements on ultrafast timescales, including protein-specific low-frequency motions...
July 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28644250/cholesterol-levels-and-hemorrhagic-stroke-risk-in-east-asian-versus-non-east-asian-populations-a-systematic-review-and-meta-analysis
#5
Liang Xie, Wei Wu, Jin Chen, Jianglong Tu, Jun Zhou, Xueliang Qi, Xiaoping Yin
BACKGROUND: The aim of this work was to evaluate the relationships between cholesterol levels and risk of hemorrhagic stroke [including intracerebral hemorrhage (ICH) and subarachnoid hemorrhage (SAH)] in East Asian versus non-East Asian populations. MATERIALS AND METHODS: Relevant prospective studies were identified from systematic searches of PubMed and EMBASE. A random-effects model was used to calculate summary relative risks (RRs) and 95% confidence intervals (CIs) that were used to compare the relationships between cholesterol levels and risk of hemorrhagic stroke in East Asian versus non-East Asian populations...
July 2017: Neurologist
https://www.readbyqxmd.com/read/28644139/gstp1-polymorphism-predicts-treatment-outcome-and-toxicities-for-breast-cancer
#6
Jie Ma, Shao-Liang Zhu, Yang Liu, Xiang-Yang Huang, Dan-Ke Su
This study aimed to investigate the association of the GSTP1 gene polymorphism with the outcomes and toxicities of treatments in breast cancer. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated for the association of GSTP1 polymorphism with tumour response and toxicities, and the hazard ratios (HRs) and 95% CIs were calculated for the association between GSTP1 polymorphism and overall survival (OS). The statistical analysis showed that the GSTP1 polymorphism was not associated with tumour response or OS...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28643895/light-switchable-azobenzene-containing-macromolecules-from-uv-to-near-infrared
#7
REVIEW
Philipp Weis, Si Wu
Azobenzene-containing macromolecules (azo-macromolecules) such as azobenzene-containing polymers (azopolymers) and azobenzene-functionalized biomacromolecules are photoswitchable macromolecules. Trans-to-cis photoisomerization in conventional azo-macromolecules is induced by ultraviolet (UV) light. However, UV light cannot penetrate deeply into issue and has a very small fraction in sunlight. Therefore, conventional azo-macromolecules are problematic for biomedical and solar-energy-related applications. In this Feature Article, the strategies for constructing visible and near-infrared (NIR) light-responsive azo-macromolecules are reviewed, and the potential applications of visible- and NIR-light-responsive azo-macromolecules in biomedicine and solar energy conversion are highlighted...
June 23, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28643829/efficient-scavenging-of-criegee-intermediates-on-water-by-surface-active-cis-pinonic-acid
#8
Shinichi Enami, A J Colussi
cis-Pinonic acid (CPA), the main product of the atmospheric oxidation of biogenic α-pinene emissions and a major component of secondary organic aerosol (SOA), is a potentially key species en route to extremely low volatility compounds. Here, we report that CPA is an exceptionally efficient scavenger of Criegee intermediates (CIs) on aqueous surfaces. Against expectations, millimolar CPA (a surface-active C10 keto-carboxylic acid possessing a rigid skeleton) is able to compete with 23 M bulk water for the CIs produced in the ozonolysis of sesquiterpene solutes by O3(g) on the surface of a water:acetonitrile solvent...
June 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28643733/a-prospective-randomized-controlled-study-of-cisplatin-versus-carboplatin-based-regimen-in-advanced-squamous-nonsmall-cell-lung-cancer
#9
Amr Shafik Saad, Ramy R Ghali, May Ahmed Shawki
BACKGROUND: The use of cisplatin (Cis) versus carboplatin (Carb) in the treatment of advanced nonsmall cell lung cancer (NSCLC) is controversial. The aim of the study was to compare the safety and efficacy of Cis versus Carb in squamous NSCLC. PATIENTS AND METHODS: A prospective, randomized, controlled, open-label study was conducted on advanced squamous NSCLC patients who were randomly assigned to receive Cis (40 mg/m 2 [day 1 and day 8]) or Carb (area under the curve = 5 [day 1]) combined with gemcitabine [Gem] (1000 mg/m 2 [day 1 and day 8]) of a 3-week schedule for six cycles...
April 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28643580/cyclophilins-less-studied-proteins-with-critical-roles-in-pathogenesis
#10
Khushwant Singh, Mark Winter, Miloslav Zouhar, Pavel Rysanek
Cyclophilins (EC 5.2.1.8) (CYPs) belong to a subgroup of proteins known as immunophilins, which also include FK-506 binding proteins (FKBPs) and parvulins. Members of the immunophilins have two main characteristic properties: I) peptidyl-prolyl cis-trans isomerase activity (PPIases) and II) the ability to bind immunosuppressant molecules of fungal origin. Cyclophilins are some of the most conserved proteins present in eukaryotes and prokaryotes, and they have been implicated in diverse cellular processes and responses to multiple biotic and abiotic stresses...
June 23, 2017: Phytopathology
https://www.readbyqxmd.com/read/28643412/rhodium-i-catalyzed-bridged-5-2-cycloaddition-of-cis-allene-vinylcyclopropanes-to-synthesize-the-bicyclo-4-3-1-decane-skeleton
#11
Cheng-Hang Liu, Zhi-Xiang Yu
Previously reported was that cis-ene-vinylcyclopropanes (cis-ene-VCPs) underwent Rh-catalyzed [5+2] reaction to give 5,7-fused bicyclic products, where vinylcyclopropane (VCP) acts as five-carbon synthon. Unfortunately, this reaction had very limited scope. Replacing the 2π component of cis-ene-VCPs to allene moiety, the corresponding cis-allene-VCPs did not undergo the expected normal [5+2] cycloaddition to give 5,7-fused bicyclic products. Instead, the challenging bicyclo[4.3.1]decane skeleton was obtained via an unprecedented bridged [5+2] cycloaddition...
June 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28643299/the-association-between-circulating-fetuin-a-levels-and-type-2-diabetes-mellitus-risk-systematic-review-and-meta-analysis-of-observational-studies
#12
REVIEW
F Roshanzamir, M Miraghajani, M H Rouhani, M Mansourian, R Ghiasvand, S M Safavi
BACKGROUND AND OBJECTIVE: Fetuin-A is a liver-derived circulating protein that is associated with insulin resistance and diabetes. The objective of this systematic review and meta-analysis of published observational studies was to investigate mean levels of fetuin-A in T2D patients and the relationship between blood fetuin-A levels and T2D risk. MATERIALS AND METHODS: PubMed, Embase, Google Scholar, Web of Science, and The Cochrane Library were systematically searched for potential relevant studies up to 1 December 2016...
June 22, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28643135/preoperative-tumor-restaging-and-resectability-assessment-of-gastric-cancers-after-chemotherapy-diagnostic-accuracy-of-mdct-using-new-staging-criteria
#13
Ijin Joo, Se Hyung Kim, Su Joa Ahn, Eun Sun Lee, Cheong-Il Shin, Hyuk-Joon Lee, Han Kwang Yang
PURPOSE: To evaluate the diagnostic performance of preoperative MDCT for tumor restaging and determination of resectability in gastric cancers after chemotherapy using new staging criteria. METHODS: This retrospective study was approved by our institutional review board and the requirement for informed consent was waived. Thirty-seven patients with initially unresectable gastric cancers who had received chemotherapy followed by surgery were included. Two independent radiologists reviewed preoperative MDCT images to determine the TNM staging and rate the overall likelihood of resectability using a 5-point scale (5: definitely unresectable, 1: definitely resectable)...
June 22, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28642974/abdominal-aortic-calcification-and-the-risk-of-bone-fractures-a-meta-analysis-of-prospective-cohort-studies
#14
Dailin Wei, Guanlin Zheng, Yun Gao, Jinying Guo, Tie Zhang
The relationship between abdominal aortic calcification (AAC) and bone fracture has been examined by some observational studies, but the results remain discordant. Therefore, we aimed to assess the link between them by conducting a meta-analysis of prospective studies. Relevant studies were identified by searching PubMed and EMBASE databases until the end of December 2016. Summary relative risks (RRs) and 95% confidence intervals (CIs) for associations between AAC and fracture risk were estimated with fixed- or random- effects models...
June 22, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28642860/ataxia-telangiectasia-mutated-atm-polymorphisms-and-risk-of-lung-cancer-in-a-chinese-population
#15
Ajay A Myneni, Shen-Chih Chang, Rungui Niu, Li Liu, Baoxing Zhao, Jianping Shi, Xiaoyou Han, Jiawei Li, Jia Su, Shunzhang Yu, Zuo-Feng Zhang, Lina Mu
BACKGROUND: The ataxia telangiectasia-mutated (ATM) gene has a key role in DNA repair including activation and stabilization of p53, which implicates the importance of ATM polymorphisms in the development of cancer. This study aims to investigate the association of two ATM single-nucleotide polymorphisms (SNPs) with lung cancer, as well as their potential interaction with p53 gene and other known risk factors of lung cancer. METHODS: A population-based case-control study was conducted in Taiyuan city, China with 399 cases and 466 controls matched on the distribution of age and sex of cases...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28642803/transcriptomic-profiles-of-aging-in-na%C3%A3-ve-and-memory-cd4-cells-from-mice
#16
Jackson Taylor, Lindsay Reynolds, Li Hou, Kurt Lohman, Wei Cui, Stephen Kritchevsky, Charles McCall, Yongmei Liu
BACKGROUND: CD4+ T cells can be broadly divided into naïve and memory subsets, each of which are differentially impaired by the aging process. It is unclear if and how these differences are reflected at the transcriptomic level. We performed microarray profiling on RNA derived from naïve (CD44(low)) and memory (CD44(high)) CD4+ T cells derived from young (2-3 month) and old (28 month) mice, in order to better understand the mechanisms of age-related functional alterations in both subsets...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28642760/interleukin-6-in-allogeneic-stem-cell-transplantation-its-possible-importance-for-immunoregulation-and-as-a-therapeutic-target
#17
REVIEW
Tor Henrik Anderson Tvedt, Elisabeth Ersvaer, Anders Aune Tveita, Øystein Bruserud
Allogeneic stem cell transplantation is associated with a high risk of treatment-related mortality mainly caused by infections and graft-versus-host disease (GVHD). GVHD is characterized by severe immune dysregulation and impaired regeneration of different tissues, i.e., epithelial barriers and the liver. The balance between pro- and anti-inflammatory cytokine influences the risk of GVHD. Interleukin-6 (IL-6) is a cytokine that previously has been associated with pro-inflammatory effects. However, more recent evidence from various autoimmune diseases (e...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28642705/polycystic-ovary-syndrome-insights-into-the-therapeutic-approach-with-inositols
#18
REVIEW
Maria A Sortino, Salvatore Salomone, Michele O Carruba, Filippo Drago
Polycystic ovary syndrome (PCOS) is characterized by hormonal abnormalities that cause menstrual irregularity and reduce ovulation rate and fertility, associated to insulin resistance. Myo-inositol (cis-1,2,3,5-trans-4,6-cyclohexanehexol, MI) and D-chiro-inositol (cis-1,2,4-trans-3,5,6-cyclohexanehexol, DCI) represent promising treatments for PCOS, having shown some therapeutic benefits without substantial side effects. Because the use of inositols for treating PCOS is widespread, a deep understanding of this treatment option is needed, both in terms of potential mechanisms and efficacy...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642459/meta-analysis-of-soy-consumption-and-gastrointestinal-cancer-risk
#19
Demin Lu, Chi Pan, Chenyang Ye, Huijie Duan, Fei Xu, Li Yin, Wei Tian, Suzhan Zhang
Soy consumption has received considerable attention for its potential role in reducing cancer incidence and mortality. However, its effects on gastrointestinal (GI) cancer are controversial. Therefore, we performed a meta-analysis to evaluate the association between soy consumption and gastrointestinal cancer risk by searching for prospective studies in PubMed, Web of Science, EMBASE and the reference lists of the included articles. The study-specific odds ratio (OR), relative risk (RR) or hazard ratio (HR) estimates and 95% confidence intervals (CIs) were pooled using either a fixed-effect or random-effect model...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642223/performing-high-level-sport-is-strongly-associated-with-urinary-incontinence-in-elite-athletes-a-comparative-study-of-372-elite-female-athletes-and-372-controls
#20
Alice Carvalhais, Jorge Renato Natal, Kari Bø
OBJECTIVE: To evaluate the prevalence of urinary incontinence (UI) in female elite athletes compared with controls and to investigate potential risk factors for UI among elite athletes. METHODS: This cross-sectional study included 372 elite athletes (athletes group, AG) and 372 age-matched controls (control group, CG). The median age was low (19 years) and the vast majority were nulliparous. Potential risk factors, including clinical, demographic and sports practice characteristics, were collected by using a questionnaire...
June 22, 2017: British Journal of Sports Medicine
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