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https://www.readbyqxmd.com/read/28719878/the-effects-of-fluoride-on-neuronal-function-occurs-via-cytoskeleton-damage-and-decreased-signal-transmission
#1
Lingli Chen, Hongmei Ning, Zhihong Yin, Xiaochao Song, Yongchao Feng, Hao Qin, Yi Li, Jundong Wang, Yaming Ge, Wenkui Wang
It has been reported that fluoride exposure may cause serious public health problems, particularly neurotoxicity. However, the underlying mechanisms remain unclear. This study used Neuro-2A cells to investigate the effects of fluoride on the cytoskeleton. The Neuro-2A cells were exposed to 0, 1, 2, 4 and 6 mM sodium fluoride (NaF) for 24 h. Cell viability and lactate dehydrogenase (LDH) release were examined. It was observed that exposure to NaF reduced cell viability, disrupted cellular membrane integrity, and high levels of LDH were released...
June 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28719739/graphene-electronic-tattoo-sensors
#2
Shideh Kabiri Ameri, Rebecca Ho, Hongwoo Jang, Li Tao, Youhua Wang, Liu Wang, David M Schnyer, Deji Akinwande, Nanshu Lu
Tattoo-like epidermal sensors are an emerging class of truly wearable electronics owing to their thinness and softness. While most of them are based on thin metal films, silicon membrane, or nanoparticle-based printable inks, we report a sub-micron thick, multimodal electronic tattoo sensors that are made of graphene. The graphene electronic tattoo (GET) is designed with filamentary serpentines and fabricated by a cost- and time-effective "wet transfer, dry patterning" method. It has a total thickness of 463 ± 30 nm, an optical transparency of ~85%, and a stretchability of more than 40%...
July 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28719729/synthesis-of-c-glucosylated-octaketide-anthraquinones-in-n-benthamiana-using-a-multispecies-based-biosynthetic-pathway
#3
Johan Andersen-Ranberg, Kenneth Thermann Kongstad, Majse Nafisi, Dan Staerk, Finn Okkels, Uffe Hasbro Mortensen, Birger Lindberg Møller, Rasmus John Normand Frandsen, Rubini Kannangara
Carminic acid is a C-glucosylated octaketide anthraquinone and the main constituent of the natural dye carmine (E120) possessing unique coloring, stability and solubility properties. Despite being used since ancient times, longstanding efforts to elucidate its route of biosynthesis have been unsuccessful. Herein is reported a novel combination of enzymes derived from a plant (Aloe arborescens, Aa), a bacterium (Streptomyces sp R1128, St), and an insect (Dactylopius coccus, Dc) that allows for the biosynthesis of the C-glucosylated anthraquinone, dcII, a precursor for carminic acid...
July 18, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28719718/cochlear-implant-electrode-array-exposure-a-delayed-complication
#4
Christina Mishu, David A Klodd, Miriam Redleaf
Exposure of the cochlear implant electrode array as a late complication has been reported rarely in the literature. A retrospective analysis revealed 4 patients presenting with exposure of their cochlear implant electrode arrays from 2 to 17 years after implantation. Data collected from these 4 patients were surgical implantation approach, type of implant, age at implant, interval between implant and complication, surgical correction of the problem, pathology at the time of correction, and length of follow-up after intervention...
July 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28719571/mir-27b-3p-suppressed-osteogenic-differentiation-of-maxillary-sinus-membrane-stem-cells-by-targeting-sp7
#5
Wei Peng, Shuangxi Zhu, Xiang Li, Junquan Weng, Songling Chen
OBJECTIVE: To explore the critical role and function of miRNAs in the regulation of development and physiology of maxillary sinus membrane stem cell (MSMSC) osteogenesis. METHODS: Microarray analysis was performed to screen the miRNAs expression profiles during the process of MSMSC osteogenic differentiation. Quantitative real-time polymerase chain reaction was applied to verify the miRNAs expression profiles. Gain- and loss-of-function experiments were used to demonstrate that miR-27b-3p inhibited MSMSC osteoblastic differentiation...
July 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28719467/pan-trk-immunohistochemistry-is-an-efficient-and-reliable-screen-for-the-detection-of-ntrk-fusions
#6
Jaclyn F Hechtman, Ryma Benayed, David M Hyman, Alexander Drilon, Ahmet Zehir, Denise Frosina, Maria E Arcila, Snjezana Dogan, David S Klimstra, Marc Ladanyi, Achim A Jungbluth
Activating neurotrophic tyrosine receptor kinase (NTRK) fusions, typically detected using nucleic-acid based assays, are highly targetable and define certain tumors. Here, we explore the utility of pan-TRK immunohistochemistry (IHC) to detect NTRK fusions. NTRK rearrangements were detected prospectively using MSK-IMPACT, a DNA-based next-generation sequencing assay. Transcription of novel NTRK rearrangements into potentially functional fusion transcripts was assessed via Archer Dx fusion assay. Pan-Trk IHC testing with mAb EPR17341 was performed on all NTRK rearranged cases and 20 cases negative for NTRK fusions on Archer...
July 17, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28719466/dedifferentiated-liposarcoma-with-epithelioid-epithelial-features
#7
Naohiro Makise, Akihiko Yoshida, Motokiyo Komiyama, Fumihiko Nakatani, Kan Yonemori, Akira Kawai, Masashi Fukayama, Nobuyoshi Hiraoka
Dedifferentiated liposarcoma (DDLPS) demonstrates a variety of growth patterns, and their histologic resemblance to other spindle cell mesenchymal tumors has been widely recognized. However, epithelioid morphology in DDLPS has only rarely been documented. Here, we report 6 cases of DDLPS with striking epithelioid/epithelial features. The patients were 5 men and 1 woman with a median age of 61 years. All tumors were located in the internal trunk. During follow-up of 1 to 41 months, local recurrence, distant metastases, and tumor-related death occurred in 4, 2, and 4 patients, respectively...
July 17, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28719451/pancreatic-ductal-adenocarcinoma-with-high-radiotracer-uptake-in-68ga-prostate-specific-membrane-antigen-pet-ct
#8
Samine Sahbai, Petra Rieping, Christina Pfannenberg, Christian la Fougère, Matthias Reimold
Prostate-specific membrane antigen imaging with PET/CT is increasingly used in prostate cancer and was shown to have a high diagnostic performance. We report a clinical case of a 67-year-old man with previous history of operated prostate cancer and increasing prostate-specific antigen blood level. Ga-HBED-CC prostate-specific membrane antigen PET/CT imaging was indicated for the assessment of local recurrence and lymph node metastases of prostate cancer. In addition, a soft tissue mass in the body of the pancreas with high radiotracer uptake was detected...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28719380/comparison-of-different-antibody-clones-for-immunohistochemistry-detection-of-programmed-cell-death-ligand-1-pd-l1-on-non-small-cell-lung-carcinoma
#9
Edwin R Parra, Pamela Villalobos, Barbara Mino, Jaime Rodriguez-Canales
Programmed cell death ligand 1 (PD-L1) is a major immune checkpoint protein that mediates antitumor immune suppression and response. Preliminary data suggest that its detection using immunohistochemistry (IHC) in formalin-fixed and paraffin-embedded tissues may predict clinical response to PD-1/PD-L1 therapy. In diagnostic pathology, it is essential to count with a validated IHC that can reliably detect PD-L1-positive cases. The present study was conducted to compare and validate different PD-L1 commercial clones and identify which ones can be reliably used by surgical pathologist to detect PD-L1 expression in human cancer tissues...
July 17, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28719344/protective-effect-of-edaravone-against-a%C3%AE-25-35-induced-mitochondrial-oxidative-damage-in-sh-sy5y-cells
#10
G-L Zhang, L Zhang, Y-Y Guo, Z-L Ma, H-Y Wang, T Li, J Liu, Y Du, L Yao, T-T Li, J-M Du
Amyloid-β (Aβ)-induced oxidative stress plays an important role in the pathogenesis of Alzheimer's disease (AD). Recent studies show that Aβ accumulation may lead to mitochondrial oxidative damage. In the present study, we investigated the protective effect of edaravone on mitochondrial damage in SH-SY5Y cells treated with Aβ25-35. SH-SY5Y cells were pre-treated with 20, 40 or 80 μM edaravone before treatment with 25 μM Aβ25-35. After 24h cell culture, cellular apoptosis, intracellular reactive oxygen species (ROS), mitochondrial membrane potential (ΔΨm), ATP levels and mitochondrial morphology were evaluated...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28719341/label-free-quantitative-proteomics-analysis-on-the-cisplatin-resistance-in-ovarian-cancer-cells
#11
F Wang, Y Zhu, S Fang, S Li, S Liu
Quantitative proteomics has been made great progress in recent years. Label free quantitative proteomics analysis based on the mass spectrometry is widely used. Using this technique, we determined the differentially expressed proteins in the cisplatin-sensitive ovarian cancer cells COC1 and cisplatin-resistant cells COC1/DDP before and after the application of cisplatin. Using the GO analysis, we classified those proteins into different subgroups bases on their cellular component, biological process, and molecular function...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28719308/a-recombinant-47-kda-outer-membrane-protein-induces-an-immune-response-against-orientia-tsutsugamushi-strain-boryong
#12
Sangho Choi, Hang Jin Jeong, Kyu-Jam Hwang, Byoungchul Gill, Young Ran Ju, Yeong Seon Lee, Jeongmin Lee
We investigated the 47-kDa outer membrane protein (OMP), which is a periplasmic serine protease and an antigenic major surface protein of Orientia tsutsugamushi, as a vaccine candidate. We developed a conventional subunit vaccine expressing recombinant 47-kDa OMP (rec47) and a DNA vaccine (p47). In mouse immunization experiments, intranasal immunization with rec47 alone or with rec47 plus heat-labile enterotoxin B subunit from Escherichia coli or plus cholera toxin (CT) as adjuvants induced a higher amount of rec47-specific antibodies than intramuscular immunization with p47 alone or with p47 plus pBOOST2-samIRF7/3 (pB) as adjuvant...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719184/nanoparticle-mediated-mechanical-destruction-of-cell-membranes-a-coarse-grained-molecular-dynamics-study
#13
Liuyang Zhang, Yiping Zhao, Xianqiao Wang
The effects of binding mode, shape, binding strength, and rotational speed of actively rotating nanoparticles on the integrity of cell membranes have been systematically studied using dissipative particle dynamics simulations. With theoretical analyses of lipid density, surface tension, stress distribution, and water permeation, we demonstrate that the rotation of nanoparticles can provide a strong driving force for membrane rupture. The results show that nanoparticles embedded inside a cell membrane via endocytosis are more capable of producing large membrane deformations under active rotation than nanoparticles attached on the cell membrane surface...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28719106/altered-pulmonary-gas-transfer-capacity-and-capillary-blood-volume-in-pediatric-crohn-s-disease
#14
Marie Verstraete, Marie-Luce Choukroun, Valerie Siao-Him Fa, Michael Fayon, Laurent Rebouissoux, Raphael Enaud, Thierry Lamireau
OBJECTIVES: To describe diffusing capacity for carbon monoxide (DLCO) and its components, that is, membrane diffusing capacity (DmCO) and pulmonary capillary blood volume (Vc) in children with Crohn's disease (CD), and to investigate the correlation between these parameters and disease activity. WORKING HYPOTHESIS: The most common lung function abnormalities are a reduced pulmonary DLCO and small airways disorders which are in many instances, clinically silent. No valid explanations have been proposed regarding the modifications in gas transfer capacity in active CD...
August 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28719071/mesoporous-silica-thin-membranes-with-large-vertical-mesochannels-for-nanosize-based-separation
#15
Yupu Liu, Dengke Shen, Gang Chen, Ahmed A Elzatahry, Manas Pal, Hongwei Zhu, Longlong Wu, Jianjian Lin, Daifallah Al-Dahyan, Wei Li, Dongyuan Zhao
Membrane separation technologies are of great interest in industrial processes such as water purification, gas separation, and materials synthesis. However, commercial filtration membranes have broad pore size distributions, leading to poor size cutoff properties. In this work, mesoporous silica thin membranes with uniform and large vertical mesochannels are synthesized via a simple biphase stratification growth method, which possess an intact structure over centimeter size, ultrathin thickness (≤50 nm), high surface areas (up to 1420 m(2) g(-1) ), and tunable pore sizes from ≈2...
July 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28719035/melatonin-inhibits-nucleus-pulposus-np-cell-proliferation-and-extracellular-matrix-ecm-remodeling-via-the-melatonin-membrane-receptors-mediated-pi3k-akt-pathway
#16
Zheng Li, Xingye Li, Chong Chen, Matthew T V Chan, William Ka Kei Wu, Jianxiong Shen
Pinealectomy in vertebrates accelerated intervertebral disc degeneration (IDD). However, the potential mechanisms, particularly, melatonin's role is still to be clarified. In this study, for first time, melatonin membrane receptors of MT1 and MT2 were found to be present in the human intervertebral disc tissues and nucleus pulposus (NP) cells, respectively. Melatonin treatment significantly inhibited NP cell proliferation in dose- dependent manner. Accordingly, melatonin down-regulated gene expression of cyclin D1, PCNA, matrix metallopeptidases-3 and -9 and upregulated gene expression of collagen type II alpha 1 chain and aggrecan in NP cells...
July 18, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28719032/the-effect-of-experimental-diabetes-and-glycaemic-control-on-guided-bone-regeneration-histology-and-gene-expression-analyses
#17
M Retzepi, E Calciolari, I Wall, M P Lewis, N Donos
OBJECTIVES: To investigate the effect of experimental diabetes and metabolic control on intramembranous bone healing following guided bone regeneration (GBR). MATERIAL AND METHODS: Ninety-three Wistar rats were allocated to three experimental groups, healthy (H), uncontrolled diabetes (D) and controlled diabetes (CD). Twenty one days following diabetes induction, a standardised 5-mm defect was created at the mid-portion of each parietal bone. In 75 animals (25H, 25D, 25CD), one defect was treated with an intracranial and extracranial membrane according to the GBR principle, and one defect was left empty (control); five animals per group were then randomly sacrificed at 3, 7, 15, 30 and 60 days and processed for decalcified histology...
July 18, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28719015/bisphenol-a-induced-oxidative-stress-and-apoptosis-in-mice-testes-modulation-by-selenium
#18
S Kaur, M Saluja, M P Bansal
Spermatogenesis, a highly coordinated process, is prone to environmental insults which may lead to impaired spermatogenesis or, at worst, infertility. Bisphenol A (BPA) is a well-known global environmental toxicant and a ubiquitous oestrogenic chemical. This study evaluated the role of selenium (0.5 ppm sodium selenite/kg diet) on spermatogenesis after BPA treatment in different groups of male BALB/c mice: control, selenium, BPA and selenium+BPA. Markers of oxidative stress and apoptosis were evaluated in testis after BPA treatment...
July 18, 2017: Andrologia
https://www.readbyqxmd.com/read/28718982/design-and-solution-phase-synthesis-of-membrane-targeting-lipopeptides-with-selective-antibacterial-activity
#19
Mohini Mohan Konai, Utsarga Adhikary, Jayanta Haldar
Designing selective antibacterial molecules remains an unmet goal in the field of membrane targeting agents. To this aim, herein we report the rational design and synthesis of a new class of lipopeptides which possess highly selective bacterial killing over mammalian cells. The selective interaction with bacterial over mammalian membranes was established through various spectroscopic as well as microscopic experiments including biophysical studies with the model membranes. A detailed antibacterial structure-activity relationship was delineated after preparing a series of molecules consisting of the peptide moieties with varied sequence of amino acids such as D-phenylalanine, D-leucine and D-lysine...
July 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28718932/checking-transfer-efficiency-and-equal-loading-via-qualitative-optical-way-in-western-blotting
#20
Jun-Hua Gong, Jian-Ping Gong, Kai-Wen Zheng
The ability to determine that successful transfer and equal loading occur prior to using primary antibodies is important. And total protein staining is commonly used to check transfer efficiency and normalization, which play a crucial role in western blotting. Ponceau S and coomassie blue are commonly used, but, there are disadvantages reported in recent years. Therefore, we are interested in finding another method, which is cheap, easy and fast. As we know, protein binding region of PVDF membrane is still hydrophilic when carbinol volatilizes, however, the non-protein binding region of PVDF membrane became hydrophobic again...
July 18, 2017: Electrophoresis
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