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https://www.readbyqxmd.com/read/29779273/-effects-of-inhibitory-concentration-minocycline-on-the-proliferation-differentiation-and-mineralization-of-osteoblasts
#1
Hua-Ying Shao, Yi-Gong Zhang, Xue Yang, Qiong-Yue Zhang, Xiao-Hong Wu
OBJECTIVE: To study the effect of the inhibitory concentration minocycline on the proliferation, differentiation, and expression of Runt-related transcription factor 2 (Runx2), alkaline phosphatase (ALP) and osteopontin (OPN) mRNA of osteoblasts. METHODS: Primary osteoblasts were cultured in osteogenic induction medium containing 0, 0.1, 0.5, 1, 10 μg·mL⁻¹ minocycline. Cell counting kit-8 was used to observe cell proliferation. ALP activity assay, alizarin red S staining, and real-time quantitative polymerase chain reaction (PCR) were used to determine cell differentiation and mineralization...
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779268/variation-in-polyphenolic-profiles-antioxidant-and-antimicrobial-activity-of-different-achillea-species-as-natural-sources-of-antiglycative-compounds
#2
Mahvash Afshari, Mehdi Rahimmalek, Mehran Miroliaei
A comparative study was carried out on the methanolic extracts from six Achillea species and the examined polyphenols from these plants on the formation of advanced glycation end-products (AGE) in vitro. A. pachycephala which was richer in flavonoids (15 mg quercetin/g W) and phenolics (111.10 mg tannic acid/g DW) with substantial antioxidant activity (IC50 = 365.5 μg/ml) presented strong anti-AGE properties. Chlorogenic acid, luteolin, quercetin and caffeic acid were identified as the major polyphenols in the extracts by HPLC...
May 19, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29779262/-salivary-exrna-biomarkers-to-detect-gingivitis-and-monitor-disease-regression
#3
Karolina Elżbieta Kaczor-Urbanowicz, Harsh M Trivedi, Patricia O Lima, Paulo M Camargo, William V Giannobile, Tristan R Grogan, Frederico O Gleber-Netto, Yair Whiteman, Feng Li, Hyo Jung Lee, Karan Dharia, Katri Aro, Carmen Martin Carerras-Presas, Saarah Amuthan, Manjiri Vartak, David Akin, Hiba Al-Adbullah, Kanika Bembey, Perry R Klokkevold, David Elashoff, Virginia Monsul Barnes, Rose Richter, William DeVizio, James G Masters, David Wong
AIM: This study tests the hypothesis that salivary extracellular RNA (exRNA) biomarkers can be developed for gingivitis detection and monitoring disease regression. MATERIALS AND METHODS: Salivary exRNA biomarker candidates were developed from a total of 100 gingivitis and non-gingivitis individuals using Affymetrix's expression microarrays. The top ten differentially expressed exRNAs were tested in a clinical cohort to determine if the discovered salivary exRNA markers for gingivitis were associated with clinical gingivitis and disease regression...
May 19, 2018: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/29779239/indoor-trichoderma-strains-emitting-peptaibols-in-guttation-droplets
#4
E Castagnoli, T Marik, R Mikkola, L Kredics, M A Andersson, H Salonen, J Kurnitski
AIMS: The production of peptaibols, toxic secondary metabolites of Trichoderma, in the indoor environment is not well-documented. Here we investigated the toxicity of peptaibols in the guttation droplets and biomass of Trichoderma strains isolated from problematic buildings. METHODS AND RESULTS: Seven indoor-isolated strains of T. atroviride, T. trixiae, T. paraviridescens and T. citrinoviride were cultivated on malt extract agar, gypsum boards and paperboards. Their biomass extracts and guttation droplets were highly cytotoxic in resting and motile boar sperm cell assays and in inhibition of somatic cell proliferation assays...
May 19, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29779216/glutamate-metabolism-in-cerebral-mitochondria-after-ischemia-and-post-ischemic-recovery-during-aging-relationships-with-brain-energy-metabolism
#5
Federica Ferrari, Antonella Gorini, Siegfried Hoyer, Roberto Federico Villa
Glutamate is involved in cerebral ischemic injury, but its role has not been completely clarified and studies are required to understand how minimize its detrimental effects, contemporarily boosting the positive ones. In fact, glutamate is not only a neurotransmitter, but primarily a key metabolite for brain bioenergetics. Thus, we investigated the relationships between glutamate and brain energy metabolism in an in vivo model of complete cerebral ischemia of 15 min and during post-ischemic recovery after 1, 24, 48, 72 and 96 hrs in 1 year- adult and 2 year-old aged rats...
May 20, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29779181/tailoring-acyclovir-prodrugs-with-enhanced-antiviral-activity-rational-design-synthesis-human-plasma-stability-and-in-vitro-evaluation
#6
Radoslav L Chayrov, Evgenios K Stylos, Maria V Chatziathanasiadou, Kiril N Chuchkov, Aleksandra I Tencheva, Androniki D Kostagianni, Tsenka S Milkova, Assia L Angelova, Angel S Galabov, Stoyan A Shishkov, Daniel G Todorov, Andreas G Tzakos, Ivanka G Stankova
Bile acid prodrugs have served as a viable strategy for refining the pharmaceutical profile of parent drugs through utilizing bile acid transporters. A series of three ester prodrugs of the antiherpetic drug acyclovir (ACV) with the bile acids cholic, chenodeoxycholic and deoxycholic were synthesized and evaluated along with valacyclovir for their in vitro antiviral activity against herpes simplex viruses type 1 and type 2 (HSV-1, HSV-2). The in vitro antiviral activity of the three bile acid prodrugs was also evaluated against Epstein-Barr virus (EBV)...
May 19, 2018: Amino Acids
https://www.readbyqxmd.com/read/29779177/computational-identification-of-structural-factors-affecting-the-mutagenic-potential-of-aromatic-amines-study-design-and-experimental-validation
#7
Svetoslav H Slavov, Iva Stoyanova-Slavova, William Mattes, Richard D Beger, Beat J Brüschweiler
A grid-based, alignment-independent 3D-SDAR (three-dimensional spectral data-activity relationship) approach based on simulated 13 C and 15 N NMR chemical shifts augmented with through-space interatomic distances was used to model the mutagenicity of 554 primary and 419 secondary aromatic amines. A robust modeling strategy supported by extensive validation including randomized training/hold-out test set pairs, validation sets, "blind" external test sets as well as experimental validation was applied to avoid over-parameterization and build Organization for Economic Cooperation and Development (OECD 2004) compliant models...
May 19, 2018: Archives of Toxicology
https://www.readbyqxmd.com/read/29779148/in-vitro-virulence-characteristics-of-rare-serovars-of-salmonella-enterica-isolated-from-sand-lizards-lacerta-agilis-l
#8
Joanna Mokracka, Sylwia Krzymińska, Danił Ałtunin, Dariusz Wasyl, Ryszard Koczura, Krzysztof Dudek, Monika Dudek, Zofia Anna Chyleńska, Anna Ekner-Grzyb
The aim of this study was to estimate virulence potential of Salmonella enterica strains colonizing the gut of free-living sand lizards (Lacerta agilis L.). The strains belonged to three Salmonella serovars: Abony, Schleissheim, and Telhashomer. Adhesion and invasion abilities of the strains were determined in quantitative assays using the gentamicin protection method. Induction of apoptosis was assessed using HeLa cell monolayers. PCR assays were used for detection of 26 virulence genes localised within mobile elements: pathogenicity islands, virulence plasmids, and prophage sequences...
May 19, 2018: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29779145/comprehensive-genetic-testing-for-female-and-male-infertility-using-next-generation-sequencing
#9
Bonny Patel, Sasha Parets, Matthew Akana, Gregory Kellogg, Michael Jansen, Chihyu Chang, Ying Cai, Rebecca Fox, Mohammad Niknazar, Roman Shraga, Colby Hunter, Andrew Pollock, Robert Wisotzkey, Malgorzata Jaremko, Alex Bisignano, Oscar Puig
PURPOSE: To develop a comprehensive genetic test for female and male infertility in support of medical decisions during assisted reproductive technology (ART) protocols. METHODS: We developed a next-generation sequencing (NGS) gene panel consisting of 87 genes including promoters, 5' and 3' untranslated regions, exons, and selected introns. In addition, sex chromosome aneuploidies and Y chromosome microdeletions were analyzed concomitantly using the same panel. RESULTS: The NGS panel was analytically validated by retrospective analysis of 118 genomic DNA samples with known variants in loci representative of female and male infertility...
May 19, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29779068/new-insights-into-the-inflamed-tumor-immune-microenvironment-of-gastric-cancer-with-lymphoid-stroma-from-morphology-and-digital-analysis-to-gene-expression
#10
Irene Gullo, Patrícia Oliveira, Maria Athelogou, Gilza Gonçalves, Marta L Pinto, Joana Carvalho, Ana Valente, Hugo Pinheiro, Sara Andrade, Gabriela M Almeida, Ralf Huss, Kakoli Das, Patrick Tan, José C Machado, Carla Oliveira, Fátima Carneiro
BACKGROUND: Gastric cancer with lymphoid stroma (GCLS) is characterized by prominent stromal infiltration of T-lymphocytes. The aim of this study was to investigate GCLS biology through analysis of clinicopathological features, EBV infection, microsatellite instability (MSI), immune gene-expression profiling and PD-L1 status in neoplastic cells and tumor immune microenvironment. METHODS: Twenty-four GCLSs were analyzed by RNA in situ hybridization for EBV (EBER), PCR/fragment analysis for MSI, immunohistochemistry (PD-L1, cytokeratin, CD3, CD8), co-immunofluorescence (CK/PD-L1, CD68/PD-L1), NanoString gene-expression assay for immune-related genes and PD-L1 copy number alterations...
May 19, 2018: Gastric Cancer
https://www.readbyqxmd.com/read/29778960/rapid-colorimetric-detection-of-p53-protein-function-using-dna-gold-nanoconjugates-with-applications-for-drug-discovery-and-cancer-diagnostics
#11
Enock Assah, Walter Goh, Xin Ting Zheng, Ting Xiang Lim, Jun Li, David Lane, Farid Ghadessy, Yen Nee Tan
The tumor suppressor protein p53 plays a central role in preventing cancer through interaction with DNA response elements (REs) to regulate target gene expression in cells. Due to its significance in cancer biology, relentless efforts have been directed toward understanding p53-DNA interactions for the development of cancer therapeutics and diagnostics. In this paper, we report a rapid, label-free and versatile colorimetric assay to detect wildtype p53 DNA-binding function in complex solutions. The assay design is based on a concept that alters interparticle-distances between RE-AuNPs from a crosslinking effect induced through tetramerization of wildtype p53 protein (p53-WT) upon binding to canonical DNA motifs modified on gold nanoparticles (RE-AuNPs)...
May 5, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29778938/effects-of-short-and-long-term-exposure-of-silver-nanoparticles-and-silver-ions-to-nitrosomonas-europaea-biofilms-and-planktonic-cells
#12
L K Barker, J R Giska, T S Radniecki, L Semprini
The increasing use of silver nanoparticles (AgNPs) in consumer products, and their resulting influx into wastewater, may pose a threat to biological nutrient removal in wastewater treatment plants. Planktonic ammonia-oxidizing bacteria (AOB), which convert ammonia to nitrite in the first step of nitrification, are highly sensitive to AgNPs and their released silver ions (Ag+ ), but the sensitivity of AOB biofilms to AgNPs and Ag+ is less clear. This study demonstrated that biofilms of Nitrosomonas europaea, a model AOB, were more resistant to both short-term and long-term exposure to AgNP and Ag+ than planktonic cells...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778907/association-of-the-fto-fat-mass-and-obesity-associated-gene-rs9939609-polymorphism-with-rewarding-value-of-food-and-eating-behavior-in-chilean-children
#13
Ana Maria Obregón Rivas, Jose L Santos, Macarena A Valladares, Jameson Cameron, Gary Goldfield
OBJECTIVES: The aim of this study was to assess the association between the single-nucleotide polymorphism rs9939609 in the FTO gene and homeostatic/non-homeostatic eating behavior patterns in Chilean children. METHODS: A cross-sectional study was conducted in 258 children (44% female; 8-14 y of age). Anthropometric measurements (weight, height, Z-score of height, body mass index, and waist circumference) were performed. Eating behavior was assessed using the Eating in Absence of Hunger Questionnaire; the Child Eating Behavior Questionnaire; the Three Factor Eating Questionnaire, and the Food Reinforcement Value Questionnaire...
March 27, 2018: Nutrition
https://www.readbyqxmd.com/read/29778888/rapid-phenotyping-of-cancer-stem-cells-using-multichannel-nanosensor-arrays
#14
Yingying Geng, Hira L Goel, Ngoc B Le, Tatsuyuki Yoshii, Rubul Mout, Gulen Y Tonga, John J Amante, Arthur M Mercurio, Vincent M Rotello
Cancer stem cells (CSCs) contribute to multidrug resistance, tumor recurrence and metastasis, making them prime therapeutic targets. Their ability to differentiate and lose stem cell properties makes them challenging to study. Currently, there is no simple assay that can capture and trace the dynamic phenotypic changes on the CSC surface. Here, we report rapid discrimination of breast CSCs from non-CSCs using a nanoparticle-fluorescent-protein based sensor. This nanosensor was employed to discriminate CSCs from non-CSCs, as well CSCs that had differentiated in vitro in two breast cancer models...
May 17, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29778874/simultaneous-determination-of-dihydrotestosterone-and-its-metabolites-in-mouse-sera-by-lc-ms-ms-with-chemical-derivatization
#15
Shashank Gorityala, Shuming Yang, Monica M Montano, Yan Xu
Androgens play a vital role in prostate cancer development, and their elimination and blockade are essential in the disease management. DHT is the key ligand for androgen receptor (AR) in the prostate. It is locally synthesized from testosterone. In the prostate, DHT is predominantly metabolized to α-diol and β-diol. Recent studies indicate that impaired DHT catabolism is associated with prostate cancer, signifying the necessity of a sensitive quantitative method for the determination of DHT and its metabolites...
May 16, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29778873/bioanalysis-of-ibrutinib-and-its-dihydrodiol-and-glutathione-cycle-metabolites-by-liquid-chromatography-tandem-mass-spectrometry
#16
J J M Rood, P J A Dormans, M J van Haren, J H M Schellens, J H Beijnen, R W Sparidans
Ibrutinib is a targeted covalent inhibitor frequently used for the treatment of various lymphomas. In addition to oxidative metabolism, it is metabolized through glutathione coupling. The quantitative insight into this kind of metabolism is scarce, and tools for quantitation are lacking. The non-oxidative metabolism could prove a more prominent role when oxidative metabolism is impaired. Also, in-vitro studies could over-estimate the effect of CYP450-inhibition. To gain quantitative insight into this relatively unknown biotransformation pathway of the drug we have developed a validated simple, fast and sensitive bio-analytical assay for ibrutinib, dihydrodiol-ibrutinib, and the glutathione, cysteinylglycine and cysteine conjugates of ibrutinib in human plasma...
May 11, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29778842/curcumin-attenuates-sepsis-induced-acute-organ-dysfunction-by-preventing-inflammation-and-enhancing-the-suppressive-function-of-tregs
#17
Longwang Chen, Yang Lu, Linjun Zhao, Lili Hu, Qiaomeng Qiu, Zhuoling Zhang, Mengfang Li, Guangliang Hong, Bing Wu, Guangju Zhao, Zhongqiu Lu
Sepsis is characterized by the extensive release of cytokines and other mediators. It results in a dysregulated immune response and can lead to organ damage and death. Curcumin has anti-inflammatory properties and immunoregulation functions in various disorders such as sepsis, cancer, rheumatoid arthritis, cardiovascular diseases, lung fibrosis, gallstone formation, and diabetes. This paper investigates the effects of curcumin on immune status and inflammatory response in mice subjected to cecal ligation and puncture (CLP)...
May 17, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29778790/applicability-of-integrated-cell-culture-reverse-transcriptase-quantitative-pcr-icc-rtqpcr-for-the-simultaneous-detection-of-the-four-human-enteric-enterovirus-species-in-disinfection-studies
#18
Hodon Ryu, Karen A Schrantz, Nichole E Brinkman, Laura A Boczek
A newly developed integrated cell culture reverse transcriptase quantitative PCR (ICC-RTqPCR) method and its applicability in UV disinfection studies is described. This method utilizes a cell culture system coupled with four RTqPCR assays to detect four species of human enterovirus (e.g., Enterovirus A, Enterovirus B, Enterovirus C and Enterovirus D). Evaluation of the RTqPCR assays was conducted with coxsackievirus A10, echovirus 30, poliovirus 1 and enterovirus 70 and resulted in 100% specificity for the tested assays...
May 17, 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29778785/oral-ibuprofen-differentially-affects-plasma-and-sweat-lipid-mediator-profiles-in-healthy-adult-males
#19
Karan Agrawal, Rémy Bosviel, Brian D Piccolo, John W Newman
Sweat contains a variety of lipid mediators, but whether they originate from the plasma filtrate or from the cutaneous sweat glandular tissues themselves is unknown. To explore this knowledge gap, we collected plasma and sweat from healthy men (n = 9) immediately before and 0.5, 2 and 4 h after oral administration of 400 mg ibuprofen. Of the over 100 lipid mediators assayed by liquid chromatography-tandem mass spectrometry, ~45 were detected in both plasma and sweat, and 36 were common to both matrices...
May 17, 2018: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29778747/novel-peptide-inhibits-inflammation-by-suppressing-of-protease-activated-receptor-2
#20
Bora Kim, Hyun-Soo Kim
We synthesized and investigated the effects of a novel peptide B, RRFSLLRY as a novel PAR-2 antagonist. Peptide B decreased calcium levels in HaCat cells stimulated with trypsin and PAR-2 activator (SLIGKV) and cytokeratin 14 and PCNA was decreased by peptide B. Peptides B also reduced the expression of inflammatory cytokines such as TNF-α and interleukin-6. Significant increase of oxazolone-induced transepidermal water loss (TEWL) was decreased by the addition of peptide B in hairless mice. These findings suggest that the anti-inflammatory effect of peptide B is due to inhibition of PAR-2 signaling...
May 17, 2018: European Journal of Pharmacology
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