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https://www.readbyqxmd.com/read/28524873/mesoporous-metallic-rhodium-nanoparticles
#1
Bo Jiang, Cuiling Li, Ömer Dag, Hideki Abe, Toshiaki Takei, Tsubasa Imai, Md Shahriar A Hossain, Md Tofazzal Islam, Kathleen Wood, Joel Henzie, Yusuke Yamauchi
Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relatively high surface energy of rhodium (Rh) metal. Here we describe a simple, scalable route to generate mesoporous Rh by chemical reduction on polymeric micelle templates [poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA)]...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28520498/palliative-care-and-parkinson-s-disease-caregiver-perspectives
#2
Isabel Boersma, Jacqueline Jones, Christina Coughlan, Julie Carter, David Bekelman, Janis Miyasaki, Jean Kutner, Benzi Kluger
BACKGROUND: Palliative care for Parkinson's disease (PD) is an emerging area of interest for clinicians, patients and families. Identifying the palliative care needs of caregivers is central to developing and implementing palliative services for families affected by PD. The objective of this paper was to elicit PD caregiver needs, salient concerns, and preferences for care using a palliative care framework. MATERIALS AND METHODS: 11 PD caregivers and one non-overlapping focus group (n = 4) recruited from an academic medical center and community support groups participated in qualitative semi-structured interviews...
May 18, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28504116/exercise-reverses-pain-related-weight-asymmetry-and-differentially-modulates-trabecular-bone-microarchitecture-in-a-rat-model-of-osteoarthritis
#3
Jim Cormier, Katherine Cone, Janell Lanpher, Abigail Kinens, Terry Henderson, Lucy Liaw, Edward J Bilsky, Tamara King, Clifford J Rosen, Glenn W Stevenson
There is great interest in developing and utilizing non-pharmacological/non-invasive forms of therapy for osteoarthritis (OA) pain including exercise and other physical fitness regimens. AIMS: The present experiments determined the effects of prior wheel running on OA-induced weight asymmetry and trabecular bone microarchitecture. MAIN METHODS: Wheel running included 7 or 21days of prior voluntary access to wheels followed by OA induction, followed by 21days post-OA access to wheels...
May 11, 2017: Life Sciences
https://www.readbyqxmd.com/read/28503693/exploiting-the-unusual-effects-of-fluorine-in-methodology
#4
Douglas L Orsi, Ryan A Altman
Fluorination of organic molecules significantly impacts the basic physicochemical properties of small and large biologically active molecules, agrichemicals, and materials. Thus, the development of synthetic reactions to access these substructures is important for many applied fields of chemistry. However, these fluorine-induced perturbations of chemical properties can inhibit standard chemical transformations, which provides unique challenges for synthetic organic chemists. In addition, the physicochemical properties imparted by fluorinated substituents can enable distinct reactivity patterns relative to non-fluorinated substrates, thus making synthetic organofluorine chemistry a fertile ground for developing new, exciting transformations...
May 15, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28497693/palladium-mediated-approach-to-coumarin-functionalized-amino-acids
#5
Lindon W K Moodie, Samy Chammaa, Tomas Kindahl, Christian Hedberg
Incorporation of the fluorogenic l-(7-hydroxycoumarin-4-yl)ethylglycine into proteins is a valuable biological tool. Coumarins are typically accessed via the Pechmann reaction, which requires acidic conditions and lacks substrate flexibility. A Pd-mediated coupling is described between o-methoxyboronic acids and a glutamic acid derived (Z)-vinyl triflate, forming latent coumarins. Global deprotection with BBr3 forms the coumarin scaffold in a single step. This mild and scalable route yielded five analogues, including a probe suitable for use at lower pH...
May 12, 2017: Organic Letters
https://www.readbyqxmd.com/read/28497680/guanidinium-based-polymerizable-surfactant-as-a-multifunctional-molecule-for-controlled-synthesis-of-nanostructured-materials-with-tunable-morphologies
#6
Jingwei Ji, Wei Zhu, Jian Li, Peng Wang, Yun Liang, Wanlin Zhang, Xianpeng Yin, Baozhen Wu, Guangtao Li
Rationally and efficiently controlling the morphology of nanomaterials plays a crucial role in significantly enhancing their functional properties and expending their applications. In this work, a strategy for controlled synthesis of diverse nanostructured materials with tunable morphologies was developed based on the use of guanidinium-based surfactant with polymerizable pyrrole unit as a multifunctional molecule that can serve not only as structure-directing agent for mesostucture formation, but also as monomer and carbon source...
May 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28494580/access-to-chiral-silicon-centers-for-application-to-circularly-polarized-luminescence-materials
#7
Shinya Koga, Shuhei Ueki, Masaki Shimada, Ryoma Ishii, Yu Kurihara, Yoshinori Yamanoi, Junpei Yuasa, Tsuyoshi Kawai, Taka-Aki Uchida, Munetaka Iwamura, Koichi Nozaki, Hiroshi Nishihara
Asymmetric arylation of secondary silanes catalyzed by a Pd-chiral phosphoramidite complex was developed for application to low-molecular-weight circularly polarized luminescence (CPL) materials. The asymmetric arylation provided a convenient, efficient synthetic method for a variety of chiral tertiary silanes (2-21), which were key intermediates for preparing the quaternary silicon center. A stepwise, one-pot procedure was used to transform the appropriate aryl iodide to the quaternary silane (22) with good yield and enantioselectivity...
May 12, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28492518/environmental-barriers-to-participation-of-preschool-children-with-and-without-physical-disabilities
#8
Lin-Ju Kang, Ming-Chieh Hsieh, Hua-Fang Liao, Ai-Wen Hwang
Environment plays a vital role in affecting participation of young children in home, school, and community. Knowledge of environmental barriers helps to develop solutions or strategies that enable participation. The study compared the environmental barriers perceived by parents of preschool children with physical disabilities (PD, n = 142) and with typical development (TD, n = 192) in Taiwan. Parents identified environmental barriers by structured interview using the Chinese version of the Child and Adolescent Scale of Environment (CASE-C)...
May 11, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28491942/a-dataset-of-multi-contrast-population-averaged-brain-mri-atlases-of-a-parkinson-s-disease-cohort
#9
Yiming Xiao, Vladimir Fonov, M Mallar Chakravarty, Silvain Beriault, Fahd Al Subaie, Abbas Sadikot, G Bruce Pike, Gilles Bertrand, D Louis Collins
Parkinson׳s disease (PD) is a neurodegenerative disease that primarily affects the motor functions of the patients. Research and surgical treatment of PD (e.g., deep brain stimulation) often require human brain atlases for structural identification or as references for anatomical normalization. However, two pitfalls exist for many current atlases used for PD. First, most atlases do not represent the disease-specific anatomy as they are based on healthy young subjects. Second, subcortical structures, such as the subthalamic nucleus (STN) used in deep brain stimulation procedures, are often not well visualized...
June 2017: Data in Brief
https://www.readbyqxmd.com/read/28488141/elevated-t-cell-activation-score-is-associated-with-improved-survival-of-breast-cancer
#10
Lingeng Lu, Yalai Bai, Zuoheng Wang
PURPOSE: Immune checkpoints cytotoxic T lymphocyte antigen 4 (CTLA4) and programmed cell death 1 receptor (PD-1) negatively regulate CD8(+) T cell functions, impeding the capacity of effector T cells to kill tumors. Here, we study the prognostic significance of CTLA4, PD-1 and T cell activation status in breast cancer. METHODS: Using a publicly accessed RNA-seq dataset including 1087 breast cancer patients, we performed Kaplan-Meier survival curves and multivariate Cox regression models to evaluate the associations of CTLA4, PD-1, and weighted T cell activation score with patients' overall survival...
May 9, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28474489/asymmetric-total-syntheses-of-%C3%AE-lycorane-zephyranthine-and-formal-synthesis-of-clivonine
#11
Xing-Wen Sun, Yong-Jian Chen, Sen-Lin Cai, Chuan-Chuan Wang, Jin-Duo Cheng, Søren Kramer
We report the successful achievement of an asymmetric route to (-)-α-lycorane and (-)-zephyranthine as well as a formal total synthesis of (+)-clivonine. A pivotal intermediate, which serves as a potent precursor for the divergent syntheses of these natural products, was accessed by a diastereoselective Pd-catalyzed cinnamylation of an N-tert-butanesulfinyl imine.
May 4, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28472927/renal-replacement-therapy-in-acute-kidney-injury-from-a-chinese-cross-sectional-study-patient-clinical-socioeconomic-and-health-service-predictors-of-treatment
#12
Fang Wang, Daqing Hong, Yafang Wang, Yunlin Feng, Li Wang, Li Yang
BACKGROUND: Renal replacement therapy (RRT) is important to support critically ill patients with acute kidney injury (AKI). This study, a part of a nation-wide survey for AKI conducted by the ISN AKF 0 by 25 China Consortium, aims to study the current RRT practical situation and problems in China. METHODS: The current study is a part of a nation-wide survey for AKI conducted by ISN AKF 0 by 25 China Consortium. The survey included 44 sites all over the country, including 22 academic hospitals in big cities and 22 local hospitals in smaller cities or rural areas...
May 4, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28471048/directing-reaction-pathways-through-controlled-reactant-binding-at-pd-tio2-interfaces
#13
Jing Zhang, Bingwen Wang, Eranda Nikolla, J Will Medlin
Recent efforts to design selective catalysts for multi-step reactions, such as hydrodeoxygenation (HDO), have emphasized the preparation of active sites at the interface between two materials having different properties. However, achieving precise control over interfacial properties, and thus reaction selectivity, has remained a challenge. Here, we encapsulated Pd nanoparticles (NPs) with TiO2 films of regulated porosity to gain a new level of control over catalyst performance, resulting in essentially 100 % HDO selectivity for two biomass-derived alcohols...
May 4, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28464374/palladium-catalyzed-regioselective-synthesis-of-3-arylindoles-from-n-ts-anilines-and-styrenes
#14
So Won Youn, Tae Yun Ko, Young Ho Jang
A Pd-catalyzed intermolecular oxidative annulation between N-Ts-anilines and styrenes was developed. This method offers a straightforward and robust approach to a wide range of 3-arylindoles using readily available starting materials with good functional-group tolerance and high regioselectivity and efficiency. Further elaboration of the products obtained from this process provided access to highly functionalized and structurally diverse indoles, for example, 3-(indol-3-yl)carbazoles, 1,9-dihydropyrrolo-[2,3-b]carbazoles, and 3'-aryl-3,5'-biindoles...
May 2, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28463396/t-cell-infiltration-and-clonality-correlate-with-programmed-cell-death-protein-1-and-programmed-death-ligand-1-expression-in-patients-with-soft-tissue-sarcomas
#15
Seth M Pollack, Qianchuan He, Jennifer H Yearley, Ryan Emerson, Marissa Vignali, Yuzheng Zhang, Mary W Redman, Kelsey K Baker, Sara Cooper, Bailey Donahue, Elizabeth T Loggers, Lee D Cranmer, Matthew B Spraker, Y David Seo, Venu G Pillarisetty, Robert W Ricciotti, Benjamin L Hoch, Terrill K McClanahan, Erin Murphy, Wendy M Blumenschein, Steven M Townson, Sharon Benzeno, Stanley R Riddell, Robin L Jones
BACKGROUND: Patients with metastatic sarcomas have poor outcomes and although the disease may be amenable to immunotherapies, information regarding the immunologic profiles of soft tissue sarcoma (STS) subtypes is limited. METHODS: The authors identified patients with the common STS subtypes: leiomyosarcoma, undifferentiated pleomorphic sarcoma (UPS), synovial sarcoma (SS), well-differentiated/dedifferentiated liposarcoma, and myxoid/round cell liposarcoma. Gene expression, immunohistochemistry for programmed cell death protein (PD-1) and programmed death-ligand 1 (PD-L1), and T-cell receptor Vβ gene sequencing were performed on formalin-fixed, paraffin-embedded tumors from 81 patients...
May 2, 2017: Cancer
https://www.readbyqxmd.com/read/28435677/control-of-immune-cell-entry-through-the-tumour-vasculature-a-missing-link-in-optimising-melanoma-immunotherapy
#16
REVIEW
Lih Yin Tan, Carmela Martini, Zvi G Fridlender, Claudine S Bonder, Michael P Brown, Lisa M Ebert
Metastatic melanoma remains a fatal disease to many worldwide, even after the breakthrough introduction of targeted therapies such as BRAF inhibitors and immune checkpoint blockade therapies such as CTLA-4 and PD-1 inhibitors. With advances in our understanding of this disease, as well as the increasing data gathered from patient studies, the significance of the host immune response to cancer progression and response to treatment is becoming clear. More specifically, the presence of intratumoral CD8(+) cytotoxic T-cells correlates with better prognosis whereas the accumulation of monocytes/macrophages and neutrophils in the tumour is often associated with worse prognosis...
March 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28423535/overall-survival-with-crizotinib-and-next-generation-alk-inhibitors-in-alk-positive-non-small-cell-lung-cancer-ifct-1302-clinalk-a-french-nationwide-cohort-retrospective-study
#17
Michaël Duruisseaux, Benjamin Besse, Jacques Cadranel, Maurice Pérol, Bertrand Mennecier, Laurence Bigay-Game, Renaud Descourt, Eric Dansin, Clarisse Audigier-Valette, Lionel Moreau, José Hureaux, Remi Veillon, Josiane Otto, Anne Madroszyk-Flandin, Alexis Cortot, François Guichard, Pascaline Boudou-Rouquette, Alexandra Langlais, Pascale Missy, Franck Morin, Denis Moro-Sibilot
Overall survival (OS) with the anaplastic lymphoma kinase (ALK) inhibitor (ALKi) crizotinib in a large population of unselected patients with ALK-positive non-small-cell lung cancer (NSCLC) is not documented. We sought to assess OS with crizotinib in unselected ALK-positive NSCLC patients and whether post-progression systemic treatments affect survival outcomes.ALK-positive NSCLC patients receiving crizotinib in French expanded access programs or as approved drug were enrolled. We collected clinical and survival data, RECIST-defined progressive disease (PD) and post-PD systemic treatment efficacy...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28410288/the-utility-of-the-combination-of-a-spect-study-with-123i-fp-cit-of-dopamine-transporters-and-123i-mibg-myocardial-scintigraphy-in-differentiating-parkinson-disease-from-other-degenerative-parkinsonian-syndromes
#18
Naoto Uyama, Hideki Otsuka, Takayoshi Shinya, Yoichi Otomi, Masafumi Harada, Wataru Sako, Yuishin Izumi, Ryuji Kaji, Yuya Watanabe, Satoru Takashi, Yamato Kunikane
OBJECTIVE: Molecular imaging of nigrostriatal dopamine transporters (DAT) and sympathetic cardiac innervation with single-photon emission computed tomography (SPECT) are useful tools for differentiating idiopathic Parkinson disease (PD) from other degenerative parkinsonian syndromes (non-PD). Nevertheless, these modalities are often insufficient for achieving a definite diagnosis. The aims of this study were to evaluate the diagnostic accuracy of the combination of these tools. MATERIALS AND METHODS: The SPECT radiotracers [I]-N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)-nortropane (FP-CIT) and meta-[I]-iodobenzylguanidine (MIBG) were used to research presynaptic dopaminergic projections (DAT SPECT) and myocardial adrenergic innervation (MIBG scintigraphy), respectively...
June 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28397821/t-cell-invigoration-to-tumour-burden-ratio-associated-with-anti-pd-1-response
#19
Alexander C Huang, Michael A Postow, Robert J Orlowski, Rosemarie Mick, Bertram Bengsch, Sasikanth Manne, Wei Xu, Shannon Harmon, Josephine R Giles, Brandon Wenz, Matthew Adamow, Deborah Kuk, Katherine S Panageas, Cristina Carrera, Phillip Wong, Felix Quagliarello, Bradley Wubbenhorst, Kurt D'Andrea, Kristen E Pauken, Ramin S Herati, Ryan P Staupe, Jason M Schenkel, Suzanne McGettigan, Shawn Kothari, Sangeeth M George, Robert H Vonderheide, Ravi K Amaravadi, Giorgos C Karakousis, Lynn M Schuchter, Xiaowei Xu, Katherine L Nathanson, Jedd D Wolchok, Tara C Gangadhar, E John Wherry
Despite the success of monotherapies based on blockade of programmed cell death 1 (PD-1) in human melanoma, most patients do not experience durable clinical benefit. Pre-existing T-cell infiltration and/or the presence of PD-L1 in tumours may be used as indicators of clinical response; however, blood-based profiling to understand the mechanisms of PD-1 blockade has not been widely explored. Here we use immune profiling of peripheral blood from patients with stage IV melanoma before and after treatment with the PD-1-targeting antibody pembrolizumab and identify pharmacodynamic changes in circulating exhausted-phenotype CD8 T cells (Tex cells)...
May 4, 2017: Nature
https://www.readbyqxmd.com/read/28396287/ability-of-palatable-food-consumption-to-buffer-against-the-short-and-long-term-behavioral-consequences-of-social-defeat-exposure-during-juvenility-in-rats
#20
J C MacKay, P Kent, J S James, C Cayer, Z Merali
In adult rats, access to a palatable diet can buffer against the effects of stressors. Approximately 10% of all adolescents are repeatedly victimized by their peers raising the possibility that palatable food consumption may be relevant to this developmental window. This study assessed the long-term impact of juvenile social defeat exposure on anxiety and depressive-like behavior and whether daily limited access to a palatable diet moderated these behavioral consequences. We also investigated the impact of the palatable diet on behavior during the defeat sessions...
April 7, 2017: Physiology & Behavior
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