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https://www.readbyqxmd.com/read/29245122/reduction-of-cancer-cell-viability-by-synergistic-combination-of-photodynamic-treatment-with-the-inhibition-of-the-id-protein-family
#1
Cornelia Roschger, Thomas Verwanger, Barbara Krammer, Chiara Cabrele
The inhibitor of DNA binding and cell differentiation (Id) proteins are dominant negative regulators of the helix-loop-helix transcription factor family and play a key role during development as well as in vascular disorders and cancer. In fact, impairing the Id-protein activity in cancer cells reduces cell growth and even chemoresistance. Recently, we have shown that a synthetic Id-protein ligand (1Y) consisting of a cyclic nonapeptide can reduce the viability of the two breast cancer cell lines MCF-7 and T47D and of the bladder cancer cells T24 to about 50% at concentrations ≥100μM...
December 5, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29245085/excretion-of-metabolites-of-the-synthetic-cannabinoid-jwh-018-in-urine-after-controlled-inhalation
#2
Stefan W Toennes, Anna Geraths, Werner Pogoda, Alexander Paulke, Cora Wunder, Eef L Theunissen, Johannes G Ramaekers
Each year, synthetic cannabinoids are occurring in high numbers on the illicit drug market but data obtained after controlled application are rare. The present study on pharmacokinetics in urine is part of a pilot study on adverse effects of JWH-018, which is one of the oldest and best known synthetic cannabinoids. Six subjects inhaled smoke from 2 and 3mg JWH-018. The drug and ten potential metabolites were analyzed in urine samples collected during 12h after inhalation by liquid chromatography-mass spectrometry (LC-MS/MS) without and with conjugate cleavage...
December 9, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29245074/fabrication-characterization-and-photoelectrochemical-activity-of-tungsten-copper-co-sensitized-tio2-nanotube-composite-photoanodes
#3
Mohamad Mohsen Momeni, Yousef Ghayeb, Farzaneh Ezati
Tungsten-copper co-sensitized TiO2 nanotube films on titanium substrate, used as photoanodes in photoelectrochemical (PEC) water splitting to produce hydrogen, have been synthesized via anodization and chemical bath deposition (CBD) methods. Field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) were used to study the morphology and elemental composition of the synthetic samples. UV-Vis diffuse reflection spectroscopy (UV-Vis DRS) was sued to investigate the optical features of the samples...
December 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29245057/a-new-randomized-kaczmarz-based-kernel-canonical-correlation-analysis-algorithm-with-applications-to-information-retrieval
#4
Jia Cai, Yi Tang
Canonical correlation analysis (CCA) is a powerful statistical tool for detecting the linear relationship between two sets of multivariate variables. Kernel generalization of it, namely, kernel CCA is proposed to describe nonlinear relationship between two variables. Although kernel CCA can achieve dimensionality reduction results for high-dimensional data feature selection problem, it also yields the so called over-fitting phenomenon. In this paper, we consider a new kernel CCA algorithm via randomized Kaczmarz method...
December 2, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29245051/magnesium-phosphate-ceramics-incorporating-a-novel-indene-compound-promote-osteoblast-differentiation-in%C3%A2-vitro-and-bone-regeneration-in%C3%A2-vivo
#5
Ju Ang Kim, Hui-Suk Yun, Young-Ae Choi, Jung-Eun Kim, So-Young Choi, Tae-Geon Kwon, Young Kyung Kim, Tae-Yub Kwon, Myung Ae Bae, Nak Jeong Kim, Yong Chul Bae, Hong-In Shin, Eui Kyun Park
Incorporating bioactive molecules into synthetic ceramic scaffolds is challenging. In this study, to enhance bone regeneration, a magnesium phosphate (MgP) ceramic scaffold was incorporated with a novel indene compound, KR-34893. KR-34893 induced the deposition of minerals and expression of osteoblast marker genes in primary human bone marrow mesenchymal stem cells (BMSCs) and a mouse osteoblastic MC3T3-E1 cell line. Analysis of the mode of action showed that KR-34893 induced the phosphorylation of MAPK/extracellular signal-regulated kinase and extracellular signal-regulated kinase, and subsequently the expression of bone morphogenetic protein 7, accompanied by SMAD1/5/8 phosphorylation...
December 7, 2017: Biomaterials
https://www.readbyqxmd.com/read/29245005/cd19-car-t-cells
#6
Michel Sadelain
CARs are synthetic receptors that reprogram immune cells for therapeutic purposes. They comprise three canonical domains for antigen recognition, T cell activation, and costimulation. The CAR cDNA is genetically integrated in the T cell genome. Autologous CAR T cells are generated from the patient's peripheral blood T cells and expand in the recipient to eliminate the targeted tumor. To view this Bench to Bedside, open or download the PDF.
December 14, 2017: Cell
https://www.readbyqxmd.com/read/29244946/in-situ-synthetic-functionalization-of-a-transmembrane-protein-nanopore
#7
Stefan Borsley, Scott L Cockroft
Monitoring current flow through a single nanopore has proved to be a powerful technique for the in situ detection of molecular structure, binding and reactivity. Transmembrane proteins, such as α-hemolysin, provide particularly attractive platforms for nanopore sensing applications due to their atomically precise structures. However, many nanopore applications require the introduction of functional groups to tune selectivity. To date, such modifications have required genetic modification of the protein prior to functionalization...
December 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29244899/spatial-response-of-synthetic-microdiamond-and-diode-detectors-measured-with-kilovoltage-synchrotron-radiation
#8
Duncan J Butler, Toby Beveridge, Joerg Lehmann, Christopher P Oliver, Andrew W Stevenson, Jayde Livingstone
PURPOSE: To map the spatial response of four solid-state radiation detectors of types commonly used for radiotherapy dosimetry. METHODS: PTW model 60016 Diode P, 60017 Diode E, 60018 Diode SRS and 60019 microDiamond detectors were radiographed using a high resolution conventional X-ray system. Their spatial response was then investigated using a 0.1 mm diameter beam of 95 keV average energy photons generated by a synchrotron. The detectors were scanned through the beam while their signal was recorded as a function of position, to map the response...
December 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/29244752/proteomic-analysis-reveals-coordinated-regulation-of-anthocyanin-biosynthesis-through-signal-transduction-and-sugar-metabolism-in-black-rice-leaf
#9
Linghua Chen, Yining Huang, Ming Xu, Zuxin Cheng, Jingui Zheng
Black rice (Oryza sativa L.) is considered to be a healthy food due to its high content of anthocyanins in the pericarp. The synthetic pathway of anthocyanins in black rice grains has been identified, however, the proteomic profile of leaves during grain development is still unclear. Here, isobaric Tags Relative and Absolute Quantification (iTRAQ) MS/MS was carried out to identify statistically significant changes of leaf proteome in the black rice during grain development. Throughout three sequential developmental stages, a total of 3562 proteins were detected and 24 functional proteins were differentially expressed 3-10 days after flowering (DAF)...
December 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29244719/synthesis-and-biological-activity-of-2-3-iso-aryl-abscisic-acid-analogs
#10
Chuan Wan, Mingan Wang, Dongyan Yang, Xiaoqiang Han, Chuanliang Che, Shanshan Ding, Yumei Xiao, Zhaohai Qin
2',3'-iso-Benzoabscisic acid (iso-PhABA), an excellent selective abscisic acid (ABA) analog, was developed in our previous work. In order to find its more structure-activity information, some structural modifications were completed in this paper, including the substitution of phenyl ring and replacing the ring with heterocycles. Thus, 16 novel analogs of iso-PhABA were synthesized and screened with three bioassays, Arabidopsis and lettuce seed germination and rice seedling elongation. Some of them, i.e., 2',3'-iso-pyridoabscisic acid (iso-PyABA) and 2',3'-iso-franoabscisic acid (iso-FrABA), displayed good bioactivities that closed to iso-PhABA and natural (+)-ABA...
December 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29244520/enantioselective-total-synthesis-of-cannogenol-3-o-%C3%AE-l-rhamnoside-via-sequential-cu-ii-catalyzed-michael-addition-intramolecular-aldol-cyclization-reactions
#11
Bijay Bhattarai, Pavel Nagorny
A concise and scalable enantioselective total synthesis of the natural cardenolides cannogenol and cannogenol-3-O-α-l-rhamnoside has been achieved in 18 linear steps. The synthesis features a Cu(II)-catalyzed enantioselective and diastereoselective Michael reaction/tandem aldol cyclization and a one-pot reduction/transposition, which resulted in a rapid (6 linear steps) assembly of a functionalized intermediate containing C19 oxygenation that could be elaborated to cardenolide cannogenol. In addition, a strategy for achieving regio- and stereoselective glycosylation at the C3 position of synthetic cannogenol was developed and applied to the preparation of cannogenol-3-O-α-l-rhamnoside...
December 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/29244519/synthetic-marine-sponge-collagen-by-late-stage-dihydroxylation
#12
Christoph Priem, Armin Geyer
Based on the observation that an increased substrate size is paralleled by an enhanced diastereoselectivity, a late-stage dihydroxylation protocol toward the 21mer CMP (collagen model peptide) Ac-(Pro-Hyp-Gly)3-Pro-Dyp-Gly-(Pro-Hyp-Gly)3-NH2 is presented. C3 and C4 hydroxylation have a converse effect on the triple-helical stability of collagen. Their combined influence on the melting temperature was studied by NMR spectroscopy.
December 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/29244483/biomembrane-permeabilization-statistics-of-individual-leakage-events-harmonize-the-interpretation-of-vesicle-leakage
#13
Stefan Braun, Šárka Pokorná, Radek Šachl, Martin Hof, Heiko Heerklotz, Maria Hoernke
The mode of action of membrane-active molecules such as antimicrobial, anticancer, cell penetrating, and fusion peptides and their synthetic mimics, transfection agents and drug permeation enhancers, biological signaling molecules (e.g., quorum sensing), involves either the general or local destabilization of the target membrane or the formation of defined, rather stable pores. Some effects aim at killing the cell, others need to be limited in space and time to avoid serious damage. Biological tests reveal translocation of compounds and cell death but do not provide a detailed, mechanistic, and quantitative understanding of the modes of action and their molecular basis...
December 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29244152/regulation-of-t-cell-proliferation-with-drug-responsive-microrna-switches
#14
Remus S Wong, Yvonne Y Chen, Christina D Smolke
As molecular and cellular therapies advance in the clinic, the role of genetic regulation is becoming increasingly important for controlling therapeutic potency and safety. The emerging field of mammalian synthetic biology provides promising tools for the construction of regulatory platforms that can intervene with endogenous pathways and control cell behavior. Recent work has highlighted the development of synthetic biological systems that integrate sensing of molecular signals to regulated therapeutic function in various disease settings...
December 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29244149/subcutaneous-tocilizumab-in-rheumatoid-arthritis-findings-from-the-common-framework-phase-4-study-programme-tozura-conducted-in-22-countries
#15
Ernest Choy, Roberto Caporali, Ricardo Xavier, Bruno Fautrel, Raimón Sanmarti, Min Bao, Corrado Bernasconi, Attila Pethö-Schramm
Objectives: The aim of this pooled analysis of the TOZURA study programme was to evaluate the efficacy and safety of subcutaneous tocilizumab (TCZ-SC) as monotherapy or in combination with conventional synthetic DMARDs (csDMARDs) in patients with moderate to severe RA who had an inadequate response to csDMARD or anti-TNF agent therapy or who were MTX naïve. Methods: TOZURA is a multinational, open-label, single-arm, common-framework, phase 4 study programme (11 protocols, 22 countries)...
December 13, 2017: Rheumatology
https://www.readbyqxmd.com/read/29244002/higher-recall-in-metagenomic-sequence-classification-exploiting-overlapping-reads
#16
Samuele Girotto, Matteo Comin, Cinzia Pizzi
BACKGROUND: In recent years several different fields, such as ecology, medicine and microbiology, have experienced an unprecedented development due to the possibility of direct sequencing of microbioimic samples. Among problems that researchers in the field have to deal with, taxonomic classification of metagenomic reads is one of the most challenging. State of the art methods classify single reads with almost 100% precision. However, very often, the performance in terms of recall falls at about 50%...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29243926/antibacterial-activity-of-nitric-oxide-releasing-hyperbranched-polyamidoamines
#17
Lei Yang, Xingzhi Wang, Dakota J Suchyta, Mark H Schoenfisch
Hyperbranched polyamidoamines (h-PAMAM) were prepared using a one-pot reaction to have similar molecular weight to third generation PAMAM (G3-PAMAM) dendrimers, and then functionalized with N-diazeniumdiolate nitric oxide (NO) donors. A wide range of NO storage capacities (∼1-2.50 μmol mg-1) and NO-release kinetics (t1/2 ∼30-80 min) were achieved by changing the extent of propylene oxide (PO) modification. The therapeutic potential of these materials was evaluated by studying their antibacterial activities and toxicity against common dental pathogens and human gingival fibroblast cells, respectively...
December 15, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29243843/signaling-cascades-in-thyroid-cancer-increasing-the-armory-of-archers-to-hit-bullseye
#18
Faiza Abdul Rashid, Qaisar Mansoor, Hafsa Aziz, Sobia Tabassum, Waleed O Arfat, George E Naoum, Muhammad Ismail, Ammad Ahmad Farooqi
Thyroid cancer is a multifaceted and therapeutically challenging disease and rapidly accumulating experimentally verified findings have considerably improve our understanding of the molecular mechanisms which underlie its development. Substantial fraction of information has been added into existing landscape of molecular oncology and we have started to develop a sharper understanding of the underlying mechanisms of thyroid cancer. Wealth of information demystified different intracellular signaling cascades which are frequently deregulated in thyroid cancer...
December 15, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29243580/coumarins-as-promising-scaffold-for-the-treatment-of-age-related-diseases-an-overview-of-the-last-five-years
#19
Giovanna Lucia Delogu, Maria Joao Matos
Degenerative diseases are becoming increasingly prevalent with the aging of the human population. The twentieth century witnessed a significant demographic change in the industrialized world that is currently followed by a similar shift of life expectancy to upper age ranges in Asia, Africa, and Middle and South America. A rising tide of chronic age-dependent diseases will soon present serious challenges for these countries. Age-related diseases are commonly seen in older patients. More than 40% of adults 60 and older have a combination of risk factors known as metabolic syndrome, which increases the risk for developing degenerative disorders, and certain cancers...
December 14, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/29243482/glycosyl-bunte-salts-a-class-of-intermediates-for-sugar-chemistry
#20
Yasuhiro Meguro, Masato Noguchi, Gefei Li, Shin-Ichiro Shoda
S-Glycosyl thiosulfates have been discovered as a new class of synthetic intermediates in sugar chemistry, named "glycosyl Bunte salts" after 19th-century German chemist, Hans Bunte. The synthesis was achieved by direct condensation of unprotected sugars and sodium thiosulfate using a formamidine-type dehydrating agent in water-acetonitrile mixed solvent. The application of glycosyl Bunte salts is demonstrated with transformation reactions into other glycosyl compounds such as a 1-thio sugar, a glycosyl disulfide, a 1,6-anhydro sugar, and an O-glycoside...
December 15, 2017: Organic Letters
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