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https://www.readbyqxmd.com/read/28340462/assessment-of-arsenic-and-fluorine-in-surface-soil-to-determine-environmental-and-health-risk-factors-in-the-comarca-lagunera-mexico
#1
Yareli A Sariñana-Ruiz, Jorge Vazquez-Arenas, Fabiola S Sosa-Rodríguez, Israel Labastida, Ma Aurora Armienta, Antonio Aragón-Piña, Miguel A Escobedo-Bretado, Laura S González-Valdez, Patricia Ponce-Peña, Hugo Ramírez-Aldaba, René H Lara
Total, bioaccessible and mobile concentrations of arsenic and fluorine are determined in polluted surface soil within the Comarca Lagunera region using standardized protocols to obtain a full description of the environmental behavior for these elements. The composition of mineral phases associated with them is evaluated with microscopic and spectroscopic techniques. Mineralogical characterizations indicate that ultra-fine particles (<1-5 μm) including mimetite-vanadite (Pb5(AsO4)3Cl, Pb5(AsO4, VO4)3Cl)-like, lead arseniate (Pb3(AsO4)2)-like and complex arsenic-bearing compounds are main arsenic-bearing phases, while fluorite (CaF2) is the only fluorine-bearing phase...
March 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28340412/discovery-of-2-substituted-1h-benzo-d-immidazole-4-carboxamide-derivatives-as-novel-poly-adp-ribose-polymerase-1-inhibitors-with-in%C3%A2-vivo-anti-tumor-activity
#2
Jie Zhou, Ming Ji, Zhixiang Zhu, Ran Cao, Xiaoguang Chen, Bailing Xu
Novel 1H-benzo[d]immidazole-4-carboxamide derivatives bearing five-membered or six-membered N-heterocyclic moieties at the 2-position were designed and synthesized as PARP-1 inhibitors. Structure-activity relationships were conducted and led to a number of potent PARP-1 inhibitors having IC50 values in the single or double digit nanomolar level. Some potent PARP-1 inhibitors also had similar inhibitory activities against PARP-2. Among all the synthesized compounds, compound 10a and 11e displayed strong potentiation effects on temozolomide (TMZ) in MX-1 cells (PF50 = 7...
March 18, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28340404/synthesis-in-vitro-antiproliferative-activity-and-kinase-profile-of-new-benzimidazole-and-benzotriazole-derivatives
#3
Konrad Chojnacki, Patrycja Wińska, Katarzyna Skierka, Monika Wielechowska, Maria Bretner
Protein kinase 2 (CK2), a member of the serine/threonine kinase family, has been established as a promising target in anticancer therapy. New derivatives of known CK2 inhibitors 4,5,6,7-tetrabromo-1H-benzimidazole (TBBi) and 4,5,6,7-tetrabromo-1H-benzotriazole (TBBt) bearing azide or substituted triazole groups were synthesized. Their influence on the activity of human recombinant CK2α and cytotoxicity against normal and cancer cell lines were evaluated. TBBi derivatives with triazole substituted with carboxyl substituent (7 and 10) exhibited the most potent inhibitory activity against CK2 with Ki value in the range of 1...
March 16, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28340294/a-well-defined-osmium-cupin-complex-hyperstable-artificial-osmium-peroxygenase
#4
Nobutaka Fujieda, Takumi Nakano, Yuki Taniguchi, Haruna Ichihashi, Hideki Sugimoto, Yuma Morimoto, Yosuke Nishikawa, Genji Kurisu, Shinobu Itoh
Thermally stable TM1459 cupin superfamily protein from Thermotoga maritima was repurposed as an osmium (Os) peroxygenase by metal-substitution strategy employing the metal-binding promiscuity. This novel artificial metalloenzyme bears a datively bound Os ion supported by the 4-histidine motif. The well-defined Os center is responsible for not only the catalytic activity but also the thermodynamic stability of the protein folding, leading to the robust biocatalyst (Tm ≈ 120 °C). The spectroscopic analysis and atomic resolution X-ray crystal structures of Os-bound TM1459 revealed two types of donor sets to Os center with octahedral coordination geometry...
March 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28339959/increased-evoked-potentials-and-behavioral-indices-in-response-to-pain-among-individuals-with-intellectual-disability
#5
Tali Benromano, Chaim G Pick, Yelena Granovsky, Ruth Defrin
Objective.:  Previous studies on the sensitivity and reactivity to pain of individuals with intellectual disability (ID) are inconsistent. The inconsistency may result from the reliance on self-reports and facial expressions of pain that are subject to internal and external biases. The aim was therefore to evaluate the reactivity to pain of individuals with ID by recording pain-evoked potentials (EPs), here for the first time, and testing their association with behavioral pain indices...
March 6, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28339788/intravenous-dendritic-cell-administration-enhances-suppression-of-lung-metastasis-induced-by-carbon-ion-irradiation
#6
Ken Ando, Hidetoshi Fujita, Akihiro Hosoi, Liqiu Ma, Masaru Wakatsuki, Ken-Ichiro Seino, Kazuhiro Kakimi, Takashi Imai, Takashi Shimokawa, Takashi Nakano
Carbon-ion radiotherapy (CIRT) is an advanced radiotherapy and has achieved good local control, even in tumors that are resistant to conventional photon beam radiotherapy (PBRT). However, distant metastasis control is an important issue. Recently, the combination of radiotherapy and immunotherapy has attracted the attention. In immunotherapy, dendritic cells (DCs) play a pivotal role in the anti-tumor immune system. However, the mechanisms underlying the combination therapy of DCs and radiotherapy have been unclear...
February 27, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28339312/biomacromolecule-lipid-hybrid-nanoparticles-for-controlled-delivery-of-sorafenib-in-targeting-hepatocellular-carcinoma-therapy
#7
Jing Zhang, Tianqi Wang, Shengjun Mu, Livesey D Olerile, Xiaoyue Yu, Na Zhang
AIM: Hybrids composed of various materials are highly versatile for drug delivery in tumor therapy including hepatocellular carcinoma. Herein, a sorafenib (SF)-loaded biomacromolecule hyaluronic acid (HA)/lipid hybrid nanoparticles (HA/SF-cLNS) were developed for targeting drug delivery. MATERIALS & METHODS: In vitro assays determined HA/SF-cLNS release behavior, enzymatic degradation, uptake and cytotoxicity. H22-bearing liver cancer xenograft murine models were used to evaluate the biodistribution and therapeutic efficacy in vivo...
March 24, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28339201/high-throughput-in-silico-structure-validation-and-revision-of-halogenated-natural-products-is-enabled-by-parametric-corrections-to-dft-computed-13-c-nmr-chemical-shifts-and-spin-spin-coupling-constants
#8
Andrei G Kutateladze, D Sai Reddy
Halogenated natural products constitute diverse and promising feedstock for molecular pharmaceuticals. However, their solution-structure elucidation by NMR presents several challenges, including the lack of fast methods to compute (13)C chemical shifts for carbons bearing heavy atoms. We show that parametric corrections to DFT-computed chemical shifts in conjunction with rff-computed spin-spin coupling constants allow for fast and reliable screening of a large number of reported halogenated natural products, resulting in expedient structure validation or revision...
March 24, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28339186/quantum-chemical-strain-analysis-for-mechanochemical-processes
#9
Tim Stauch, Andreas Dreuw
The use of mechanical force to initiate a chemical reaction is an efficient alternative to the conventional sources of activation energy, i.e., heat, light, and electricity. Applications of mechanochemistry in academic and industrial laboratories are diverse, ranging from chemical syntheses in ball mills and ultrasound baths to direct activation of covalent bonds using an atomic force microscope. The vectorial nature of force is advantageous because specific covalent bonds can be preconditioned for rupture by selective stretching...
March 24, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28339070/125i%C3%A2-seed-irradiation-induces-apoptosis-and-inhibits-angiogenesis-by-decreasing-hif-1%C3%AE-and-vegf-expression-in-lung-carcinoma-xenografts
#10
Gui-Ling Xiang, Xin-Hong Zhu, Cun-Zhi Lin, Li-Jun Wang, Yong Sun, Yi-Wei Cao, Fang-Fang Wang
The purpose of this study was to examine the effects of irradiation by 125I seeds in human lung cancer xenograft model and to determine the underlying mechanisms involved, with a focus on angiogenesis. A group of 40 mice bearing A549 lung adenocarcinoma xenografts was randomly separated into 4 groups: control group (n=10), sham seed (0 mCi) implant group (n=10), 125I seed (0.6 mCi) implant group (n=10) and 125I seed (0.8 mCi) implant group (n=10), respectively. The body weight and tumor volume, were recorded every four days until the end of the study...
March 23, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28339056/nobiletin-inhibits-invasion-via-inhibiting-akt-gsk3%C3%AE-%C3%AE-catenin-signaling-pathway-in-slug-expressing-glioma-cells
#11
Xiang Zhang, Kebin Zheng, Chunhui Li, Yonghui Zhao, Heyang Li, Xuguang Liu, Yinbo Long, Junchao Yao
Epithelial-mesenchymal transition (EMT) is a pivotal event in tumor progression during which cancer cells undergo dramatic changes acquiring highly invasive properties. In this study, we found that nobiletin, a polymethoxylated flavone, suppressed migration and invasion in both U87 and U251 glioma cells. Expression of epithelial markers (E-cadherin and occludin) was upregulated; mesenchymal markers (N-cadherin, fibronectin) and the transcriptional factor Slug were downregulated after nobiletin treatment. Transforming growth factor β (TGF-β) was applied to stimulate EMT and the results showed that nobiletin not only influenced basal level cell migration but also prevented TGF-β-triggered migration and EMT, with the AKT/GSK3β/β-catenin signaling pathway greatly involved...
March 23, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28338993/dihydrocelastrol-inhibits-multiple-myeloma-cell-proliferation-and-promotes-apoptosis-through-erk1-2-and-il-6-stat3-pathways-in-vitro-and-in-vivo
#12
Liangning Hu, Huiqun Wu, Bo Li, Dongliang Song, Guang Yang, Gege Chen, Bingqian Xie, Zhijian Xu, Yong Zhang, Dandan Yu, Jun Hou, Wenqin Xiao, Xi Sun, Gaomei Chang, Yiwen Zhang, Lu Gao, Bojie Dai, Yi Tao, Jumei Shi, Weiliang Zhu
Multiple myeloma (MM) is the second most frequent malignant hematological disease. Dihydrocelastrol (DHCE) is synthesized by hydrogenated celastrol, a treterpene isolated from Chinese medicinal plant Tripterygium regelii. In this study, we first reported the anti-tumor activity of DHCE on MM cells. We found that DHCE could inhibit cell proliferation and promote apoptosis through caspase-dependent way in vitro. In addition, DHCE could inactivate the expression of interleukin (IL)-6 and downregulate the phosphorylation of extracellular regulated protein kinases (ERK1/2) and the signal transducer and activator of transcription 3 (STAT3) in MM...
March 17, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28338330/stereoselective-synthesis-of-annuionone-a-and-annuionone-b
#13
Lizhen Jiang, Xiaojing Liu, Po Yuan, Yanli Zhang, Xiaochuan Chen
A stereoselective synthetic approach was utilized to synthesize enantiopure annuionones A (1b) and B (2b), two ionone-type norsesquiterpenoids that both bear a 6-oxabicyclo[3.2.1]octane framework and possess allelopathic activity. A stereoselective Diels-Alder reaction based on chiral trisubstituted dienophile 20 was employed to obtain the optically active polysubstituted cyclohexane core of both natural products. Using this approach, (+)-annuionone A (1b) and (-)-annuionone B (2b) were synthesized from lactol (+)-15 in 10% overall yield...
March 24, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28338225/the-impact-of-family-unification-housing-vouchers-on-child-welfare-outcomes
#14
Michael Pergamit, Mary Cunningham, Devlin Hanson
This study addresses whether providing housing vouchers through the Family Unification Program (FUP) to families involved in the child welfare system reduces child maltreatment and the need for child welfare services. The study uses child welfare administrative data on 326 children in Portland, Oregon, and 502 children in San Diego, California from the point at which their families were referred to the program through 18 months post-referral. Using a quasi-experimental waitlist comparison design, probit regressions show little impact of FUP on preventing child removal from home, but some positive impact on reunification among children already placed out of home...
March 24, 2017: American Journal of Community Psychology
https://www.readbyqxmd.com/read/28338206/impact-and-clinical-significance-of-embosphere-microsphere-artery-embolization-therapy-in-serum-vegf-expression-level-of-women-patients-with-uterine-fibroids
#15
H-X Ge, W Xu, D-Q Du, A-J Wang
OBJECTIVE: We aimed to investigate the effect of Embosphere microsphere artery embolization on the serum level of vascular endothelial growth factor (VEGF) in patients with uterine fibroid. PATIENTS AND METHODS: From March 2014 to December 2015, 128 women in child-bearing age with uterine intramural fibroids were enrolled in the patient group. At the same time, 128 healthy cases in child-bearing age were randomly selected and enrolled in the control group. Enzyme-linked immunosorbent assay was used to measure the serum level of VEGF, and immunohistochemical staining method was used to study the expression of VEGF in the uterine fibroids...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28338141/structurally-related-hydrazone-based-metal-complexes-with-different-antitumor-activities-variably-induce-apoptotic-cell-death
#16
Dominik A Megger, Kristin Rosowski, Christian Radunsky, Jutta Kösters, Barbara Sitek, Jens Müller
Three new complexes bearing the tridentate hydrazone-based ligand 2-(2-(1-(pyridin-2-yl)ethylidene)hydrazinyl)pyridine (L) were synthesized and structurally characterized. Biological tests indicate that the Zn(ii) complex [ZnCl2(L)] is of low cytotoxicity against the hepatocellular carcinoma cell line HepG2. In contrast, the Cu(ii) and Mn(ii) complexes [CuCl2(L)] and [MnCl2(L)] are highly cytotoxic with EC50 values of 1.25 ± 0.01 μM and 20 ± 1 μM, respectively. A quantitative proteome analysis reveals that treatment of the cells with the Cu(ii) complex leads to a significantly altered abundance of 102 apoptosis-related proteins, whereas 38 proteins were up- or down-regulated by the Mn(ii) complex...
March 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28338043/redshifted-cherenkov-radiation-for-in-vivo-imaging-coupling-cherenkov-radiation-energy-transfer-to-multiple-f%C3%A3-rster-resonance-energy-transfers
#17
Yann Bernhard, Bertrand Collin, Richard A Decréau
Cherenkov Radiation (CR), this blue glow seen in nuclear reactors, is an optical light originating from energetic β-emitter radionuclides. CR emitter (90)Y triggers a cascade of energy transfers in the presence of a mixed population of fluorophores (which each other match their respective absorption and emission maxima): Cherenkov Radiation Energy Transfer (CRET) first, followed by multiple Förster Resonance Energy transfers (FRET): CRET ratios were calculated to give a rough estimate of the transfer efficiency...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337575/a-novel-modeling-approach-for-estimating-patterns-of-migration-into-and-out-of-san-francisco-by-hiv-status-and-race-among-men-who-have-sex-with-men
#18
Alison J Hughes, Yea-Hung Chen, Susan Scheer, H Fisher Raymond
In the early 1980s, men who have sex with men (MSM) in San Francisco were one of the first populations to be affected by the human immunodeficiency virus (HIV) epidemic, and they continue to bear a heavy HIV burden. Once a rapidly fatal disease, survival with HIV improved drastically following the introduction of combination antiretroviral therapy in 1996. As a result, the ability of HIV-positive persons to move into and out of San Francisco has increased due to lengthened survival. Although there is a high level of migration among the general US population and among HIV-positive persons in San Francisco, in- and out-migration patterns of MSM in San Francisco have, to our knowledge, never been described...
March 23, 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28337321/prototypic-18-f-labeled-argininamide-type-neuropeptide-y-y1r-antagonists-as-tracers-for-pet-imaging-of-mammary-carcinoma
#19
Max Keller, Simone Maschauer, Albert Brennauer, Philipp Tripal, Norman Koglin, Ralf Dittrich, Günther Bernhardt, Torsten Kuwert, Hans-Jürgen Wester, Armin Buschauer, Olaf Prante
The neuropeptide Y (NPY) Y1 receptor (Y1R) selective radioligand (R)-N(α)-(2,2-diphenylacetyl)-N(ω)-[4-(2-[(18)F]fluoropropanoylamino)butyl]aminocarbonyl-N-(4-hydroxybenzyl)argininamide ([(18)F]23), derived from the high-affinity Y1R antagonist BIBP3226, was developed for imaging studies of Y1R-positive tumors. Starting from the argininamide core bearing amine-functionalized spacer moieties, a series of fluoropropanoylated and fluorobenzoylated derivatives was synthesized and studied for Y1R affinity. The fluoropropanoylated derivative 23 displayed high affinity (Ki = 1...
March 9, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28337291/cholecystokinin-attenuates-radiation-induced-lung-cancer-cell-apoptosis-by-modulating-p53-gene-transcription
#20
Yi Han, Chongyu Su, Daping Yu, Shijie Zhou, Xiaoyun Song, Shuku Liu, Ming Qin, Yunsong Li, Ning Xiao, Xiaoqing Cao, Kang Shi, Xu Cheng, Zhidong Liu
The deregulation of p53 in cancer cells is one of the important factors by which cancer cells escape from the immune surveillance. Cholecystokinin (CCK) has strong bioactivity in the regulation of a number of cell activities. This study tests a hypothesis that CCK interferes with p53 expression to affect the apoptotic process in lung cancer (tumor) cells. In this study, tumor-bearing mice and A549 cells (a tumor cell line) were irradiated. The expression of CCK and p53 in tumor cells was assessed with RT-qPCR and Western blotting...
2017: American Journal of Translational Research
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