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https://www.readbyqxmd.com/read/28551574/toxicity-of-silver-nanoparticles-towards-tumoral-human-cell-lines-u-937-and-hl-60
#1
Anna Barbasz, Magdalena Oćwieja, Maciej Roman
The toxicity of three types of silver nanoparticles towards histiocytic lymphoma (U-937) and human promyelocytic cells (HL-60) was studied. The nanoparticles were synthesized in a chemical reduction method using sodium borohydride. Trisodium citrate and cysteamine hydrochloride were used to generate a negative and positive nanoparticle surface charge. The evaluation of cell viability, membrane integrity, antioxidant activity and the induction of inflammation were used to evaluate the difference in cellular response to the nanoparticle treatment...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28551209/electromagnetic-induction-of-foam-based-nanoscale-zerovalent-iron-nzvi-particles-to-thermally-enhance-non-aqueous-phase-liquid-napl-volatilization-in-unsaturated-porous-media-proof-of-concept
#2
Supawan Srirattana, Kitsanateen Piaowan, Gregory V Lowry, Tanapon Phenrat
Nanoscale zerovalent iron (NZVI) is a promising remediation agent for volatile organic compound (VOC) contamination in saturated sub-surfaces, but is rarely applied to the vadose zone as there are not enough water molecules in the unsaturated zone to participate in reductive dechlorination. In this study, we evaluated the possibility of using foam as a carrying vehicle to emplace NZVI in unsaturated porous media followed by the application of low frequency-electromagnetic field (LF-EMF) to enhance VOC volatilization in laboratory batch reactors...
May 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28550060/surface-sensing-for-flagellar-gene-expression-on-solid-media-in-paenibacillus-sp-naist15-1
#3
Kazuo Kobayashi, Yu Kanesaki, Hirofumi Yoshikawa
A rhizosphere Gram-positive bacterial isolate, Paenibacillus sp. NAIST15-1, exhibits intriguing motility behavior on hard agar media. Paenibacillus sp. shows increased transcription of flagellar genes and hyperflagellation when transferred from liquid to solid media. Hyperflagellated cells form wandering colonies that are capable of moving around on the surface of media containing ≥1.5% agar. Transposon mutagenesis was used to identify genes critical for motility. In addition to flagellar genes, this mutagenesis identified five non-flagellar structural genes that were important for motility...
May 26, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28549943/do-heat-and-moisture-exchangers-in-the-anaesthesia-breathing-circuit-preserve-body-temperature-in-dogs-undergoing-anaesthesia-for-magnetic-resonance-imaging
#4
Latifa Khenissi, Gwen Covey-Crump, Toby G Knowles, Joanna Murrell
OBJECTIVE: To investigate whether the use of a heat and moisture exchanger (HME) preserves body temperature in dogs weighing <10 kg anaesthetised for magnetic resonance imaging (MRI). STUDY DESIGN: Prospective, randomised, clinical trial. ANIMALS: Thirty-one client-owned dogs. METHODS: Dogs were assigned randomly to a treatment group [HME (n = 16) or no HME (n = 15)]. Dogs were pseudorandomised according to the premedication they were administered, either dexmedetomidine or no dexmedetomidine...
March 6, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28548630/tenogenic-differentiation-of-human-embryonic-stem-cells
#5
Tina P Dale, Shazia Mazher, William R Webb, Jing Zhou, Nicola Maffulli, G-Q Chen, Alicia J El Haj, Nicholas R Forsyth
Tendon healing is complex to manage because of the limited regeneration capacity of tendon tissue; stem cell-based tissue engineering approaches may provide alternative healing strategies. We sought to determine whether human embryonic stem cells (hESC) could be induced to differentiate into tendon-like cells by the addition of exogenous bone morphogenetic protein (BMP)12 (growth differentiation factor(GDF)7) and BMP13 (GDF6). hESC (SHEF-1) were maintained with or without BMP12/13 supplementation, or supplemented with BMP12/13 and the SMAD signalling cascade blocking agent, dorsomorphin...
May 26, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28547897/mannich-curcuminoids-as-potent-anticancer-agents
#6
Márió Gyuris, László Hackler, Lajos I Nagy, Róbert Alföldi, Eszter Rédei, Annamária Marton, Tibor Vellai, Nóra Faragó, Béla Ózsvári, Anasztázia Hetényi, Gábor K Tóth, Péter Sipos, Iván Kanizsai, László G Puskás
A series of novel curcuminoids were synthesised for the first time via a Mannich-3CR/organocatalysed Claisen-Schmidt condensation sequence. Structure-activity relationship (SAR) studies were performed by applying viability assays and holographic microscopic imaging to these curcumin analogues for anti-proliferative activity against A549 and H1975 lung adenocarcinoma cells. The TNFα-induced NF-κB inhibition and autophagy induction effects correlated strongly with the cytotoxic potential of the analogues. Significant inhibition of tumour growth was observed when the most potent analogue 44 was added in liposomes at one-sixth of the maximally tolerated dose in the A549 xenograft model...
May 26, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28546430/crosstalk-between-the-h3k36me3-and-h4k16ac-histone-epigenetic-marks-in-dna-double-strand-break-repair
#7
Lin Li, Yinsheng Wang
Post-translational modifications of histone proteins regulate numerous cellular processes. Among these modifications, trimethylation of lysine 36 in histone H3 (H3K36me3) and acetylation of lysine 16 in histone H4 (H4K16ac) have important roles in transcriptional regulation and DNA damage response signaling. However, whether these two epigenetic histone marks are mechanistically linked remains unclear. Here, we discovered a new pathway through which H3K36me3 stimulates H4K16ac upon DNA double-strand break (DSB) induction in human cells...
May 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28545761/ultrastructural-analysis-of-human-leukemia-u-937-cells-after-apoptosis-induction-localization-of-proteasomes-and-perichromatin-fibers
#8
Ekaterina S Snigirevskaya, Yan Yu Komissarchik
We studied the ultrastructure of human histiocytic lymphoma U-937cells after apoptosis induction with two external agents, hypertonic shock and etoposide. Appearance of aggregates of particles of nuclear origin within the nuclei and cytoplasm of the induced cells was the first and the most prominent morphological sign of apoptosis. These aggregates were not coated by a membrane, had variable shape, density and size. Two types of particles dominated in the aggregates: perichromatin fibers (PFs) and proteasomes (PRs)...
May 22, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28545464/c10orf10-depp-mediated-ros-accumulation-is-a-critical-modulator-of-foxo3-induced-autophagy
#9
S Salcher, M Hermann, U Kiechl-Kohlendorfer, M J Ausserlechner, P Obexer
BACKGROUND: Neuroblastoma is the most common solid tumor in childhood and develops from undifferentiated progenitor cells of the sympathetic nervous system. In neuronal tumor cells DNA-damaging chemotherapeutic agents activate the transcription factor FOXO3 which regulates the formation of reactive oxygen species (ROS) and cell death as well as a longevity program associated with therapy resistance. We demonstrated before that C10ORF10/DEPP, a transcriptional target of FOXO3, localizes to peroxisomes and mitochondria and impairs cellular ROS detoxification...
May 25, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28544572/inositol-treatment-of-anovulation-in-women-with-polycystic-ovary-syndrome-a-meta-analysis-of-randomised-trials
#10
Jyotsna Pundir, Dimitrios Psaroudakis, Prakash Savnur, Priya Bhide, Luca Sabatini, Helena Teede, Arri Coomarasamy, Shakila Thangaratinam
BACKGROUND: Polycystic ovary syndrome is a common cause of anovulation and infertility, and a risk factor for development of metabolic syndrome and endometrial cancer. OBJECTIVES: Systematic review and meta-analysis of randomised controlled trials that evaluated the effects of inositol as an ovulation-induction agent. SEARCH STRATEGY: We searched MEDLINE, EMBASE, Cochrane and ISI conference proceedings, Register and Meta-register for RCTs and WHO trials' search portal...
May 24, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28543858/survival-improvement-in-human-retinal-pigment-epithelial-cells-via-fas-receptor-targeting-by-mir-374a
#11
Nooshin Tasharrofi, Fatemeh Kouhkan, Masoud Soleimani, Zahra-Sheila Soheili, Mahboubeh Kabiri, Mohaddeseh Mahmoudi Saber, Farid Abedin Dorkoosh
Oxidative conditions of the eye could contribute to retinal cells loss through activating the Fas-L/Fas pathway. This phenomenon is one of the leading causes of some ocular diseases like age-related macular degeneration (AMD). By targeting proteins at their mRNA level, microRNAs (miRNAs) can regulate gene expression and cell function. The aim of the present study is to investigate Fas targeting by miR-374a and find whether it can inhibit Fas-mediated apoptosis in primary human retinal pigment epithelial (RPE) cells under oxidative stress...
May 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28543133/defense-syndromes-in-lodgepole-whitebark-pine-ecosystems-relate-to-degree-of-historical-exposure-to-mountain-pine-beetles
#12
Kenneth F Raffa, Charles J Mason, Pieruluigi Bonello, Stephen Cook, Nadir Erbilgin, Ken Keefover-Ring, Jennifer G Klutsch, Caterina Villari, Philip A Townsend
Warming climate is allowing tree-killing bark beetles to expand their ranges and access naïve and semi-naïve conifers. Conifers respond to attack using complex mixtures of chemical defenses that can impede beetle success, but beetles exploit some compounds for host location and communication. Outcomes of changing relationships will depend on concentrations and compositions of multiple host compounds, which are largely unknown. We analyzed constitutive and induced chemistries of Dendroctonus ponderosae's primary historical host, Pinus contorta, and P...
May 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28542556/an-inactivated-hand-foot-and-mouth-disease-vaccine-using-the-enterovirus-71-c4a-strain-isolated-from-a-korean-patient-induces-a-strong-immunogenic-response-in-mice
#13
Hyun Ju In, Heeji Lim, Jung-Ah Lee, Hye Jin Kim, Jin-Won Kim, Ji-Yeon Hyeon, Sang-Gu Yeo, June-Woo Lee, Jung Sik Yoo, Young Ki Choi, Sang-Won Lee
Enterovirus 71 (EV71) is a major causative agent of hand-foot-and-mouth disease (HFMD) frequently occurring in children. HFMD induced by EV71 can cause serious health problems and has been reported worldwide, particularly in the Asia-Pacific region. In this study, we assessed the immunogenicity of a formalin-inactivated HFMD vaccine using an EV71 strain (FI-EV71 C4a) isolated from a Korean patient. The vaccine candidate was evaluated in mice to determine the vaccination doses and vaccine schedules. BALB/c mice were intramuscularly administered 5, 10, or 20 μg FI-EV71 vaccine, followed by a booster 2 weeks later...
2017: PloS One
https://www.readbyqxmd.com/read/28542453/extracellular-calcium-promotes-bone-formation-from-bone-marrow-mesenchymal-stem-cells-by-amplifying-the-effects-of-bmp-2-on-smad-signalling
#14
Rubén Aquino-Martínez, Natalia Artigas, Beatriz Gámez, José Luis Rosa, Francesc Ventura
Understanding the molecular events that regulate osteoblast differentiation is essential for the development of effective approaches to bone regeneration. In this study, we analysed the osteoinductive properties of extracellular calcium in bone marrow-derived mesenchymal stem cell (BM-MSC) differentiation. We cultured BM-MSCs in 3D gelatin scaffolds with Ca2+ and BMP-2 as osteoinductive agents. Early and late osteogenic gene expression and bone regeneration in a calvarial critical-size defect model demonstrate that extracellular Ca2+ enhances the effects of BMP-2 on Osteocalcin, Runx2 and Osterix expression and promotes bone regeneration in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28542269/the-small-molecule-kinase-inhibitor-d11-counteracts-17-aag-mediated-up-regulation-of-hsp70-in-brain-cancer-cells
#15
Susanne Schaefer, Tina H Svenstrup, Barbara Guerra
Many types of cancer express high levels of heat shock proteins (HSPs) that are molecular chaperones regulating protein folding and stability ensuring protection of cells from potentially lethal stress. HSPs in cancer cells promote survival, growth and spreading even in situations of growth factors deprivation by associating with oncogenic proteins responsible for cell transformation. Hence, it is not surprising that the identification of potent inhibitors of HSPs, notably HSP90, has been the primary research focus, in recent years...
2017: PloS One
https://www.readbyqxmd.com/read/28540557/dissolution-of-steel-slags-in-aqueous-media
#16
Shashikant Yadav, Anurag Mehra
Steel slag is a major industrial waste in steel industries, and its dissolution behavior in water needs to be characterized in the larger context of its potential use as an agent for sequestering CO2. For this purpose, a small closed system batch reactor was used to conduct the dissolution of steel slags in an aqueous medium under various dissolution conditions. In this study, two different types of steel slags were procured from steel plants in India, having diverse structural features, mineralogical compositions, and particle sizes...
May 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28540436/premedication-with-melatonin-vs-midazolam-efficacy-on-anxiety-and-compliance-in-paediatric-surgical-patients
#17
Pietro Impellizzeri, Enrica Vinci, Maria Cristina Gugliandolo, Francesca Cuzzocrea, Rosalba Larcan, Tiziana Russo, Maria Rosaria Gravina, Salvatore Arena, Gabriella D'Angelo, Eloisa Gitto, Angela Simona Montalto, Angela Alibrandi, Lucia Marseglia, Carmelo Romeo
Preoperative anxiety is a major problem in paediatric surgical patients. Melatonin has been used as a premedicant agent and data regarding effectiveness are controversial. The primary outcome of this randomized clinical trial was to evaluate the effectiveness of oral melatonin premedication, in comparison to midazolam, in reducing preoperative anxiety in children undergoing elective surgery. As secondary outcome, compliance to intravenous induction anaesthesia was assessed. There were 80 children undergoing surgery randomly assigned, 40 per group, to receive oral midazolam (0...
May 24, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28539822/induction-of-mitotic-delay-in-pharyngeal-and-nasopharyngeal-carcinoma-cells-using-an-aqueous-extract-of-ajuga-bracteosa
#18
Yu-Tsai Lin, Chih-Che Lin, Hung-Chen Wang, Yi-Chiang Hsu
Nasopharyngeal carcinoma (NPC) is a common cancer in Southeast Asia, for which radiotherapy and/or chemotherapy are the primary treatment methods. Many herbs are known to have potential uses in chemotherapy; however, the mechanisms underlying the observed antitumor activity of Ajuga bracteosa (AB) against NPC remain unclear. We explored the antitumor effects of AB, which was shown specifically to induce mitotic delay in pharyngeal (Detroit 562) and nasopharyngeal (Hone-1) cancer cells. Proliferation of cancer cells after exposure to aqueous extract of A...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28539744/biological-effects-of-hesperetin-on-interleukin-6-phosphorylated-signal-transducer-and-activator-of-transcription-3-pathway-signaling-in-prostate-cancer-pc3-cells
#19
Moein Shirzad, Esfandiar Heidarian, Pezhman Beshkar, Mostafa Gholami-Arjenaki
BACKGROUND: Interleukin-6 (IL-6) is a multifunctional glycoprotein that regulates the growth of some tumors, including prostate carcinomas due to signal transducer and activator of transcription 3 (STAT3), extracellular signal-regulated kinases 1/2 (ERK1/2), and AKT signaling pathways. Hesperetin, as a flavanone, has several biological properties such as antitumor and anti-inflammatory. OBJECTIVE: This study was carried out to evaluate the biological effects of hesperetin on the IL-6 gene expression and phosphorylated STAT3, AKT, and ERK1/2 signaling pathways in PC3 prostate cancer (PC) cells...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28539444/improved-prefusion-stability-optimized-codon-usage-and-augmented-virion-packaging-enhance-the-immunogenicity-of-respiratory-syncytial-virus-rsv-fusion-protein-in-a-vectored-vaccine-candidate
#20
Bo Liang, Joan O Ngwuta, Sonja Surman, Barbora Kabatova, Xiang Liu, Matthias Lingemann, Xueqiao Liu, Lijuan Yang, Richard Herbert, Joanna Swerczek, Man Chen, Syed M Moin, Azad Kumar, Jason S McLellan, Peter D Kwong, Barney S Graham, Peter L Collins, Shirin Munir
Respiratory syncytial virus (RSV) is the most important viral agent of severe pediatric respiratory tract disease worldwide, but lacks a licensed vaccine or suitable antiviral drug. A live-attenuated chimeric bovine/human parainfluenza virus type-3 (rB/HPIV3) was developed previously as a vector expressing RSV fusion (F) protein to confer bivalent protection against RSV and HPIV3. In a previous clinical trial in virus-naïve children, rB/HPIV3 was well-tolerated but the immunogenicity of wildtype RSV F was unsatisfactory...
May 24, 2017: Journal of Virology
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