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https://www.readbyqxmd.com/read/29684903/repurposing-itraconazole-to-the-benefit-of-skin-cancer-treatment-a-combined-azole-ddab-nanoencapsulation-strategy
#1
C Carbone, C Martins-Gomes, V Pepe, A M Silva, T Musumeci, G Puglisi, P M Furneri, E B Souto
In this work, we aimed at developing an improved topical SLN formulation combining itraconazole delivery with a coating layer of didodecyldimethylammonium bromide, thus repurposing the drug effectiveness by synergistic skin anticancer effectiveness. In order to obtain a stable SLN formulation with small homogeneously dispersed particles, a deep formulative study was developed screening three different solid lipids (Suppocire NB, Cetyl Palmitate and Dynasan 114) for the SLN preparation by the phase inversion temperature...
April 17, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29684854/the-role-of-her2-nrf2-axis-in-induction-of-oxaliplatin-resistance-in-colon-cancer-cells
#2
Abbas Pirpour Tazehkand, Maryam Akbarzadeh, Kobra Velaie, Mohammad Reza Sadeghi, Nasser Samadi
Nuclear factor erythroid 2-related factor 2 (Nrf2) plays a pivotal role in promoting chemoresistance by regulation of antioxidants and detoxification enzymes. Her2 is a member of tyrosine kinase receptor family with a key function in resistance of cancer cells to chemotherapeutics. The aim of this study was to investigate the possible cross talk between Nrf2 and Her2 mediated signaling pathways in development of oxaliplatin resistance in colon cancer cells. We first generated oxaliplatin-resistant LS174T and SW480 colon cancer cells with different Her2 expression levels by employing IC50 concentrations followed by a resting period...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684847/the-association-between-p53-protein-phosphorylation-at-serine-15-serine-20-and-sensitivity-of-cells-isolated-from-patients-with-ovarian-cancer-and-cell-lines-to-chemotherapy-in-in-vitro-study
#3
Iwona Kamińska, Julia K Bar
BACKGROUND: The association between p53 protein phosphorylated at serine 15 (Ser15), serine 20 (Ser20) and ovarian tumor cell sensitivity after chemotherapy was analyzed in order to define the influence of p53 activation on tumor cell sensitivity to chemotherapy. METHODS: The study was performed on ovarian cancer cell line (OvBH-1), colon adenocarcinoma metastasis to ovary (SW626) and on cells isolated from ascitic fluids from patients with ovarian cancer: with (p53+) or without (p53-) p53 nuclear protein accumulation...
December 15, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29684816/gaba-regulates-the-proliferation-and-apoptosis-of-mac-t-cells-through-the-lps-induced-tlr4-signaling-pathway
#4
Yue-Ying Wang, Shi-Ping Sun, He-Shui Zhu, Xian-Qin Jiao, Kai Zhong, Yu-Jie Guo, Guang-Ming Zha, Li-Qiang Han, Guo-Yu Yang, He-Ping Li
Subacute ruminal acidosis (SARA) can cause rapid lipopolysaccharide (LPS) elevation and milk yield decline in lactating ruminants. LPS has been shown to promote apoptosis and reduce the proliferation of mammary epithelial cells. Previous studies have shown that γ- amino butyric acid (GABA) can enhance production performance, regulating β-cell apoptosis and proliferation. Whether GABA can regulate apoptosis and proliferation induced by LPS in mammary epithelial cells is unknown. In this paper, we detected the role of GABA on proliferation and apoptosis as well as inflammation induced by LPS in bovine mammary epithelial cells (MAC-T cell line)...
April 18, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29684689/is-the-chlorophyll-derivative-zn-ii-e-6-me-a-good-photosensitizer-to-be-used-in-root-canal-disinfection
#5
P Diogo, M Mota, C Fernandes, D Sequeira, P Palma, F Caramelo, M G P M S Neves, M A F Faustino, T Gonçalves, J M Santos
BACKGROUND: The aim of this study was to assess antimicrobial efficacy and cytotoxic outcomes of a chlorophyll based photosensitizer (PS) Zn(II)chlorin e6 methyl ester (Zn(II)e6 Me), when applied to human dentin discs and root blocks infected with 48 h biofilms. The results were compared with the ones obtained with FotoSan® (commercial Toluidine Blue O formulation) and 3% sodium hypochlorite (NaOCl). METHODOLOGY: Dentin and root blocks were infected with mixed biofilms of Enterococcus faecalis and Candida albicans; exposed for 15 min to 0...
April 20, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29684688/layer-by-layer-hollow-photosensitizer-microcapsule-design-via-a-manganese-carbonate-hard-template-for-photodynamic-therapy-in-cells
#6
Andreza Ribeiro Simioni, Priscila Costa Carvalho de Jesus, Antonio Claudio Tedesco
BACKGROUND: Microcapsules fabricated using layer-by-layer self-assembly have unique properties, making them attractive for drug delivery applications. The technique has been improved, allowing the deposition of multiple layers of oppositely charged polyelectrolytes on spherical, colloidal templates. These templates can be decomposed by coating multiple layers, resulting in hollow shells. In this paper, we describe a novel drug delivery system for loading photosensitizer drugs into hollow multilayered microcapsules for photoprocess applications...
April 20, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29684680/licochalcone-a-an-effective-and-low-toxicity-compound-against-toxoplasma-gondii-in-vitro-and-in-vivo
#7
Hongfei Si, Chunyan Xu, Jili Zhang, Xukun Zhang, Bing Li, Xuzheng Zhou, Jiyu Zhang
Toxoplasma gondii, an obligate intracellular protozoan, is the causative agent of toxoplasmosis, which can cause serious public health problems. The current drugs used to treat toxoplasmosis have many limitations. This study evaluated the anti-T. gondii activity and potential mechanism of Licochalcone A (Lico A) in vitro and in vivo. The safe concentration of Lico A in HFF cells was determined by MTT cell viability assays. The presence of T. gondii was assessed by qPCR and Giemsa staining. Azithromycin and sulfadiazine, commonly used effective treatments, served as drug controls...
March 1, 2018: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/29684677/human-stem-cell-based-corneal-tissue-mimicking-structures-using-laser-assisted-3d-bioprinting-and-functional-bioinks
#8
Anni Sorkio, Lothar Koch, Laura Koivusalo, Andrea Deiwick, Susanna Miettinen, Boris Chichkov, Heli Skottman
There is a high demand for developing methods to produce more native-like 3D corneal structures. In the present study, we produced 3D cornea-mimicking tissues using human stem cells and laser-assisted bioprinting (LaBP). Human embryonic stem cell derived limbal epithelial stem cells (hESC-LESC) were used as a cell source for printing epithelium-mimicking structures, whereas human adipose tissue derived stem cells (hASCs) were used for constructing layered stroma-mimicking structures. The development and optimization of functional bioinks was a crucial step towards successful bioprinting of 3D corneal structures...
April 16, 2018: Biomaterials
https://www.readbyqxmd.com/read/29684606/sterigmatomyces-halophilus-%C3%AE-glucan-improves-the-immune-response-and-bacterial-resistance-in-pacific-red-snapper-lutjanus-peru-peripheral-blood-leucocytes-in-vitro-study
#9
Martha Reyes-Becerril, Francisco A Guardiola, Veronica Sanchez, Minerva Maldonado, Carlos Angulo
β-Glucans are naturally occurring polysaccharides that are produced by bacteria, fungi and yeast. They are considered immunostimulants in fish acting on non-specific defense mechanism. Yeast-derived glucans from cell wall (Sterigmatomyces halophilus, β-Gluc/Sh) have been used for this purpose in this study. Therefore, an in vitro assay using peripheral blood leucocytes (PBLs) from Pacific red snapper was performed to evaluate the stimulant effects of β-Gluc/Sh and zymosan A (positive control) for 12 and 24 h and after bacterial challenge with Aeromonas hydrophila at 24 h...
April 20, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29684604/effect-of-antiaggregants-on-the-in-vitro-viability-cell-count-and-stability-of-abalone-haliotis-iris-haemocytes
#10
Roffi Grandiosa, Mai-Louise Bouwman, Tim Young, Fabrice Mérien, Andrea C Alfaro
The ability to successfully prepare and preserve haemocyte cells for microscopy and flow cytometry is critical for the investigation of animal immune systems. In this study, we observed the total cell count, in vitro viability and stability of New Zealand black-footed abalone (Haliotis iris) haemocytes with different antiaggregants and handling protocols. Haemocyte stability was evaluated by direct observation of haemocytes under the microscope and calculating the aggregation index. Haemocyte counts and viability were measured via flow cytometry and tested for the effect of different antiaggregants (Alsever's solution at three concentrations, and specialised blood collection tubes containing lithium heparin and K2 EDTA) at different temperatures and storage times...
April 20, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29684590/a-synthetic-snake-venom-based-tripeptide-glu-val-trp-protects-pc12-cells-from-mpp-toxicity-by-activating-the-ngf-signaling-pathway
#11
Carolina P Bernardes, Neife A G Santos, Flavia M Sisti, Rafaela Scalco Ferreira, Norival A Santos-Filho, Adélia C O Cintra, Eduardo M Cilli, Suely V Sampaio, Antonio C Santos
Venom small peptides that target neurotrophin receptors might be beneficial in neurodegeneration, including Parkinsońs disease (PD). Their small size, ease of synthesis, structural stability and target selectivity make them important tools to overcome the limitations of endogenous neurotrophins as therapeutic agents. Additionally, they might be optimized to improve resistance to enzymatic degradation, bioavailability, potency and, mainly, lipophilicity, important to cross the blood brain barrier (BBB). Here, we evaluated the neuroprotective effects and mechanisms of the synthetic snake-venom-based peptide p-BTX-I (Glu-Val-Trp) in PC12 cells treated with MPP+ (1-methyl-4-phenylpyridinium), a dopaminergic neurotoxin that induces Parkinsonism in vivo...
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29684585/nogo-b-reticulon-4b-functions-as-a-negative-regulator-of-the-apoptotic-pathway-through-the-interaction-with-c-flip-in-colorectal-cancer-cells
#12
Nao Kawaguchi, Keitaro Tashiro, Kohei Taniguchi, Masaru Kawai, Keitaro Tanaka, Junji Okuda, Michihiro Hayashi, Kazuhisa Uchiyama
Nogo-B is a member of the Nogo/Reticulon-4 family and has been reported to be an inducer of apoptosis in certain types of cancer cells. However, the role of Nogo-B in human cancer remains less understood. Here, we demonstrated the functions of Nogo-B in colorectal cancer cells. In clinical colorectal cancer specimens, Nogo-B was obviously overexpressed, as determined by immunohistochemistry; and Western blot analysis showed its expression level to be significantly up-regulated. Furthermore, knockdown of Nogo-B in two colorectal cancer cell lines, SW480 and DLD-1, by transfection with si-RNA (siR) resulted in significantly reduced cell viability and a dramatic increase in apoptosis with insistent overexpression of cleaved caspase-8 and cleaved PARP...
April 20, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29684554/short-term-oral-gavage-administration-of-adenine-induces-a-model-of-fibrotic-kidney-disease-in-rats
#13
Chang Z Zhu, Kelly J Doyle, Arthur L Nikkel, Lauren Olsen, Marian T Namovic, Katherine Salte, Deborah Widomski, Zhi Su, Diana L Donnelly-Roberts, Murali M Gopalakrishnan, Steve McGaraughty
INTRODUCTION: The adenine model of kidney disease typically involves dietary delivery of adenine over several weeks. This model can be variable in its disease progression and can result in significant mortality. In the current study, the amount of adenine delivered to rats was controlled by utilizing oral gavage administration over a short period in an attempt to induce robust renal pathology while addressing variability and viability of the animals. METHODS: Adenine (150 or 200 mg/kg) was administered via oral gavage for 10 consecutive days, and assessed over a total of 20 days...
April 20, 2018: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/29684169/characterization-and-performance-tests-of-a-new-osl-tl-personal-dosemeter-for-individual-monitoring
#14
A L M C Malthez, E M Yoshimura, V L S N Button, M B Freitas
We propose a personal dosemeter based on the combination of thermoluminescence (TL) and optically stimulated luminescence (OSL) detectors employing the advantages of both techniques. The new OSL/TL dosemeter using a badge manufactured in a 3D printer was tested for assessment of photon doses in simulated and actual situations of exposure. Additionally, Brazilian national performance tests adapted to the new dosemeter were run as well as the performance tests of international standards on the passive dosimetry systems...
April 19, 2018: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29683794/the-mount-sinai-international-enhancement-of-social-work-leadership-program-the-past-and-the-future
#15
Elisa Gordon, Karen Green, Louisa Whitwam, Irwin Epstein, Susan Bernstein
Developed in 1988, the Mount Sinai International Enhancement of Social Work Leadership Program brings 4-6 social workers from several countries each year to the Mount Sinai Hospital in New York City, where they meet with leaders from the hospital, community based organizations and graduate schools of social work, to enhance their leadership ability, strengthen management and research skills, and build upon global social work relationships. This article reviews the results of a survey conducted in 2016 to assess whether the visiting scholars met established learning objectives of the Program...
July 2018: Social Work in Health Care
https://www.readbyqxmd.com/read/29683697/inhibition-and-mediated-activation-between-conditioned-stimuli-parallels-between-perceptual-learning-and-associative-conditioning
#16
Cody W Polack, Ralph R Miller
This series examines the associative basis of inhibitory perceptual learning. Four experiments demonstrate that inhibitory perceptual learning, like Pavlovian conditioned inhibition, is affected by manipulating the number of training trials. Specifically, many interspersed XB/AB training trials (in which letters represent initially neutral stimuli such as tones, clicks, and flashing lights) followed by A-US pairings caused X to act like a conditioned inhibitor (Experiment 1), which is presumed to suggest that an inhibitory association between conditioned stimuli X and A had been formed (i...
April 2018: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/29683658/enhanced-biosynthesis-performance-of-heterologous-proteins-in-cho-k1-cells-using-crispr-cas9
#17
Wenpeng Wang, Wenyun Zheng, Fengzhi Hu, Xiujuan He, Dong Wu, Wenliang Zhang, Haipeng Liu, Xingyuan Ma
Chinese hamster ovary (CHO) cells are the famous expression system for industrial production of recombinant proteins, such as therapeutic antibodies. However, there retained still bottlenecks in protein quality and weakness in expression efficiency because of the intrinsic genetic properties of the cell. Here we have enhanced biosynthesis performance of heterologous proteins in CHO-K1 cell using CRISPR-Cas9 by editing the genome precisely with two genes for improving ER microenvironment and reinforcing anti-apoptotic ability...
April 23, 2018: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29683641/efficient-capture-and-high-activity-release-of-circulating-tumor-cells-by-using-tio2-nanorod-arrays-coated-with-soluble-mno2-nanoparticles
#18
Rui Li, Fangfang Chen, Huiqin Liu, Zixiang Wang, Zitong Zhang, Yuan Wang, Heng Cui, Wei Liu, Xingzhong Zhao, Zhi-Jun Sun, Shi-Shang Guo
Effective capture and release of circulating tumor cells(CTCs) with high viability is still a challenge in medical research. We design a novel approach with efficient yield, high cell activity to capture and release of CTCs. Our platform is based on TiO2 nanorod arrays coated with transparent MnO2 nanoparticles. We use hydrothermal synthesis to prepare TiO2 nanorod arrays, the MnO2 nanoparticles are fabricated through in situ self-assembly on the substrate to form a monolayer and etched by oxalic acid with low concentration at room temperature...
April 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29683272/ultrahigh-energy-density-lithium-ion-cable-battery-based-on-the-carbon-nanotube-woven-macrofilms
#19
Ziping Wu, Kaixi Liu, Chao Lv, Shengwen Zhong, Qinghui Wang, Ting Liu, Xianbin Liu, Yanhong Yin, Yingyan Hu, Di Wei, Zhongfan Liu
Moore's law predicts the performance of integrated circuit doubles every two years, lasting for more than five decades. However, the improvements of the performance of energy density in batteries lag far behind that. In addition, the poor flexibility, insufficient-energy density, and complexity of incorporation into wearable electronics remain considerable challenges for current battery technology. Herein, a lithium-ion cable battery is invented, which is insensitive to deformation due to its use of carbon nanotube (CNT) woven macrofilms as the charge collectors...
April 23, 2018: Small
https://www.readbyqxmd.com/read/29682866/metapopulation-dynamics-in-a-changing-climate-increasing-spatial-synchrony-in-weather-conditions-drives-metapopulation-synchrony-of-a-butterfly-inhabiting-a-fragmented-landscape
#20
Aapo Kahilainen, Saskya van Nouhuys, Torsti Schulz, Marjo Saastamoinen
Habitat fragmentation and climate change are both prominent manifestations of global change, but there is little knowledge on the specific mechanisms of how climate change may modify the effects of habitat fragmentation, e.g. by altering dynamics of spatially structured populations. The long-term viability of metapopulations is dependent on independent dynamics of local populations, because it mitigates fluctuations in the size of the metapopulation as a whole. Metapopulation viability will be compromised if climate change increases spatial synchrony in weather conditions associated with population growth rates...
April 23, 2018: Global Change Biology
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