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https://www.readbyqxmd.com/read/28109147/-co-culture-with-umbilical-cord-mesenchymal-stem-cells-promotes-the-synthesis-and-mechnism-of-milk-protein-in-bovine-mammary-epithelial-cells
#1
Yankun Zhao, Wei Shao, Chenglong Luo, Kaile Wu, Xiong Yu
Objective To explore the possible mechanism of umbilical cord mesenchymal stem cells (UCMSCs) regulating milk protein synthesis in bovine mammary gland epithelial cells (BMECs). Methods UCMSCs and BMECs were co-cultured by double-chamber Transwell(TM), and other BMECs were cultured alone as a control group. Insulin like growth factor 1 receptor (IGF-1R) inhibitor AG1024 was used to treat cells. IGF-1, β casein (CSN2) and κ casein (CSN3) content in the supernatants were determined by ELISA; the relative expression abundance of Janus kinase and signal transducer and activator of transcription factor (JAK/STAT) signaling pathway-related genes were detected by quantitative real-time PCR (qRT-PCR); and after the cells were treated with JAK2 signal blocker AG490, qRT-PCR was performed to test the relative expression abundance of CSN2 and CSN3 mRNAs...
February 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28109144/-interferon-regulatory-factor-5-irf5-regulates-the-differentiation-of-bone-marrow-derived-macrophages-in-mice
#2
Kang Sun, Jianguo Qu, Jixiang Chen, Shengchun Dang, Songbing He, Jin Zhang, Rong Xie, Yun Wang, Jianxin Zhang
Objective To investigate the expression differences of interferon regulatory factor 5 (IRF5) between M1 and M2 macrophages derived from mouse bone marrow and the effects of small interfering RNA targeting IRF5 gene (IRF5 siRNA) on macrophage differentiation. Methods With the treatment of IFN-γ and lipopolysaccharide (LPS), mouse bone marrow-derived macrophages were differentiated into M1 macrophages; while with the treatment of IL-4, mouse bone marrow-derived macrophages were differentiated into M2 macrophages...
February 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28109041/endemic-cyanophages-and-the-puzzle-of-phage-bacteria-coevolution
#3
Otto X Cordero
A recent genomic analysis of Synechococcus cyanophages sampled for over 15 years reveals a remarkable pattern of stable phage population structure, highly reminiscent of the ecotype structure observed in bacteria and archaeal ecotypes. In this highlight I discuss the importance of this finding and the questions and opportunities it opens to learn more about the nature of phage-bacterial coevolution in the environment. This article is protected by copyright. All rights reserved.
January 20, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28108956/post-implantation-fate-of-adipogenic-induced-mesenchymal-stem-cells-on-type-i-collagen-scaffold-in-a-rat-model
#4
Balu Venugopal, Francis B Fernandez, V S Harikrishnan, Annie John
Regenerative medicine via its application in soft tissue reconstruction through novel methods in adipose tissue engineering (ATE) has gained remarkable attention and investment despite simultaneous reports on clinical incidence of graft resorption and impaired vascularization. The underlying malaise here once identified may play a critical role in optimizing implant function. Our work attempts to determine the fate of donor cells and the implant in recipient micro environment using adipose-derived mesenchymal stem cells (ASCs) on a type I collagen sponge, an established scaffold for ATE...
February 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28108874/surviving-in-isolation-genetic-variation-bottlenecks-and-reproductive-strategies-in-the-canarian-endemic-limonium-macrophyllum-plumbaginaceae
#5
Ares Jiménez, Barbara Weigelt, Arnoldo Santos-Guerra, Juli Caujapé-Castells, José María Fernández-Palacios, Elena Conti
Oceanic archipelagos are typically rich in endemic taxa, because they offer ideal conditions for diversification and speciation in isolation. One of the most remarkable evolutionary radiations on the Canary Islands comprises the 16 species included in Limonium subsection Nobiles, all of which are subject to diverse threats, and legally protected. Since many of them are single-island endemics limited to one or a few populations, there exists a risk that a loss of genetic variation might limit their long-term survival...
January 20, 2017: Genetica
https://www.readbyqxmd.com/read/28108840/differences-in-monoterpene-biosynthesis-and-accumulation-in-pistacia-palaestina-leaves-and-aphid-induced-galls
#6
Karin Rand, Einat Bar, Matan Ben Ari, Rachel Davidovich-Rikanati, Natalia Dudareva, Moshe Inbar, Efraim Lewinsohn
Certain insect species can induce gall formation on numerous plants species. Although the mechanism of gall development is largely unknown, it is clear that insects manipulate their hosts' anatomy, physiology, and chemistry for their own benefit. It is well known that insect-induced galls often contain vast amounts of plant defensive compounds as compared to non-colonized tissues, but it is not clear if defensive compounds can be produced in situ in the galled tissues. To answer this question, we analyzed terpene accumulation patterns and possible independent biosynthetic potential of galls induced by the aphid Baizongia pistaciae L...
January 20, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28108764/letr-is-a-tetr-family-transcription-factor-from-lysobacter-controlling-antifungal-antibiotic-biosynthesis
#7
Ping Wang, Hongfu Chen, Guoliang Qian, Fengquan Liu
Heat-stable antifungal factor (HSAF) is a newly identified and broad-spectrum antifungal antibiotic from Lysobacter enzymogenes, a ubiquitous environmental proteobacterium. Yet, the regulatory mechanism for HSAF biosynthesis in L. enzymogenes remains poorly understood. Here, we report the identification of a TetR-family protein Le1552 (LetR) from L. enzymogenes strain OH11 that is involved in transcriptional repression of HSAF production. Bacterial one-hybrid and gel mobility shift assays show that LetR directly binds to PHSAF (the promoter region of the HSAF biosynthesis operon)...
January 20, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28108750/-titanium-or-steel-as-osteosynthesis-material-systematic-literature-search-for-clinical-evidence
#8
Alexander Joeris, Sabine Goldhahn, Elke Rometsch, Dankward Höntzsch
BACKGROUND: The selection of the appropriate implant material, stainless steel or titanium, is still the decision of the surgeon and/or the affiliated institution. Additionally, remarkable international differences can be found between the different markets, which cannot really be explained. OBJECTIVE: A systematic literature search was performed to verify whether there is clinical evidence for the preference of one material over the other. MATERIAL AND METHODS: The systematic literature search was performed utilizing the internet databases PubMed, Cochrane and Web of Science...
January 20, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28108674/effects-of-microrna-338-on-morphine-tolerance-by-targeting-cxcr4-in-a-rat-model-of-bone-cancer-pain
#9
Hong-Xia Mei, Min-Hong Zhou, Xing-Wang Zhang, Xi-Xi Huang, Yong-Le Wang, Pei-Fang Wang, Gong-Hao Zhan
This study aimed to investigate the effects of microRNA-338 (miR-338) on morphine tolerance through the targeting of CXCR4 in a rat model of bone cancer pain (BCP). Sprague Dawley rats were obtained and divided into model saline (n = 10), model morphine (n = 50), normal saline (n = 10) and normal morphine (healthy rats, n = 10) groups. After BCP rat model establishment, the remaining SD rats (n = 40) in the model saline group were assigned into pLV-THM-miR-338, pLV-THM-anti-miR-338, CXCR4 shRNA, blank and phosphate buffer saline (PBS) groups...
January 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28108531/plasmodium-sporozoite-biology
#10
Friedrich Frischknecht, Kai Matuschewski
Plasmodium sporozoite transmission is a critical population bottleneck in parasite life-cycle progression and, hence, a target for prophylactic drugs and vaccines. The recent progress of a candidate antisporozoite subunit vaccine formulation to licensure highlights the importance of sporozoite transmission intervention in the malaria control portfolio. Sporozoites colonize mosquito salivary glands, migrate through the skin, penetrate blood vessels, breach the liver sinusoid, and invade hepatocytes. Understanding the molecular and cellular mechanisms that mediate the remarkable sporozoite journey in the invertebrate vector and the vertebrate host can inform evidence-based next-generation drug development programs and immune intervention strategies...
January 20, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28108511/biomarker-based-pet-imaging-of-diffuse-intrinsic-pontine-glioma-in-mouse-models
#11
Susanne Kossatz, Brandon Carney, Melanie E Schweitzer, Giuseppe Carlucci, Vesselin Miloushev, Uday B Maachani, Prajwal Rajappa, Kayvan Keshari, David J Pisapia, Wolfgang A Weber, Mark M Souweidane, Thomas Reiner
Diffuse intrinsic pontine glioma (DIPG) is a childhood brainstem tumor with a universally poor prognosis. Here, we characterize on a positron emission tomography (PET) probe for imaging DIPG in vivo. In human histological tissues, the probes target, poly(ADP)ribose polymerase 1 (PARP1), was highly expressed in DIPG compared to normal brain. PET imaging allowed for the sensitive detection of DIPG in a genetically engineered mouse model (GEMM), and probe uptake correlated to histologically determined tumor infiltration...
January 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28108159/influence-of-silver-nanoparticles-on-benthic-oxygen-consumption-of-microbial-communities-in-freshwater-sediments-determined-by-microelectrodes
#12
Lingzhan Miao, Chao Wang, Jun Hou, Peifang Wang, Yanhui Ao, Yi Li, Yu Yao, Bowen Lv, Yangyang Yang, Guoxiang You, Yi Xu
Increasing use of silver nanoparticles (NPs) will inevitably result in release of these particles into aquatic environments, with sediments as a substantial sink. Nevertheless it remained largely unknown whether Ag NPs present potential impacts in sediment functioning. In this study, thus, a microcosm approach was constructed and the potential impacts of Ag NPs and PVP-coated Ag NPs on the oxygen consumption in freshwater sediments (collected from Taihu Lake) were determined using oxygen microelectrodes. To our knowledge, this is the first time that microelectrodes have been used to estimate the impacts of Ag NPs in sediments...
January 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28107979/electrochemical-sensing-platform-based-on-molecularly-imprinted-polymer-decorated-n-s-co-doped-activated-graphene-for-ultrasensitive-and-selective-determination-of-cyclophosphamide
#13
Bintong Huang, Lili Xiao, Haifeng Dong, Xueji Zhang, Wei Gan, Shahid Mahboob, Khalid Abdullah Al-Ghanim, Qunhui Yuan, Yingchun Li
A novel electrochemical sensor has been facilely fabricated by applying composite elements consisting of nitrogen and sulfur co-doped activated graphene (N,S-AGR) and molecularly imprinted polymer (MIP). N,S-AGR was synthesized by one-pot pyrogenation of a mixture of thiourea, KOH and graphene oxide, which was introduced to improve electron transfer capability and surface area of the electrode, while the electro-polymerized MIP layer afforded simultaneous recognition and quantification of cyclophosphamide (CPA) by utilizing Fe(CN)6(3-/4-) as probe to indicate electrical signals...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107968/towards-perylenequinonoid-effective-application-to-reversible-fluorescent-probe-for-monitoring-hydrogen-persulfide-in-solvents-and-living-cells
#14
Tiancheng Qiu, Haipeng Wei, Dan Cheng, Liyan Zhang, Chuanglin Jiang, Shenglian Luo, Lin Yuan, Zebing Zeng
Hydrogen persulfide (H2S2), as a direct redox form of H2S, may have its own physiological processes in maintaining intracellular redox homeostasis. The research on hydrogen persulfide was rapidly growing. As it is the actual signalling molecules derived from hydrogen sulfide, reversible detection of hydrogen persulfide changes in cells is of great significance. To address this critical need, we present a reversible fluorescent switch-on H2S2 probe, the tautomeric of 6, 7-dihydroxyperylene-1, 12-quinone (DHPQ), capable of tracking H2S2 in solvents and living cells...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107918/bismuth-nanoparticles-carbon-nanotubes-modified-sensor-for-sulfasalazine-analysis
#15
Biljana Nigović, Sandra Jurić, Iva Mitrović
Nanocomposite of bismuth nanoparticles and carbon nanotubes in Nafion matrix was used as modifier for glassy carbon electrode in analysis of anti-inflamatory drug sulfasalazine. The nanocomposite surface exhibited exceptional synergy and remarkable enhancement effect to the voltammetric response of drug. The surface morphology and structure characterization of the modified electrodes was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and cyclic voltammetry. The sensor exhibited excellent electroanalytical performance for drug determination in comparison with bismuth film electrode...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107867/an-update-on-the-2014-ebola-outbreak-in-western-africa
#16
REVIEW
Haaris A Shiwani, Rebabonye B Pharithi, Barkat Khan, Christian Binoun-A Egom, Peter Kruzliak, Vincent Maher, Emmanuel Eroume-A Egom
The recent Ebola outbreak in Western Africa was the most devastating outbreak witnessed in recent times. There have been remarkable local and international efforts to control the crisis. Ebola Virus Disease is the focus of immense research activity. The progression of events in the region has been evolving swiftly and it is of paramount importance to the medical community to be acquainted with the situation. Over 28000 people were inflicted with the condition, over 11000 have died. Novel data has emerged regarding modes of transmission, providing rationale for recent flare-ups...
January 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28107725/photo-release-of-nitrous-oxide-from-the-hyponitrite-ion-studied-by-infrared-spectroscopy-evidence-for-the-generation-of-a-cobalt-n2o-complex-experimental-and-dft-calculations
#17
M Elizabeth Chacón Villalba, Carlos A Franca, Jorge A Güida
The solid state photolysis of sodium, silver and thallium hyponitrite (M2N2O2, M=Na, Ag, Tl) salts and a binuclear complex of cobalt bridged by hyponitrite ([Co(NH3)5-N(O)-NO-Co(NH3)5](4+)) were studied by irradiation with visible and UV light in the electronic absorption region. The UV-visible spectra for free hyponitrite ion and binuclear complex of cobalt were interpreted in terms of Density Functional Theory calculations in order to explain photolysis behavior. The photolysis of each compound depends selectively on the irradiation wavelength...
January 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28107699/analysis-of-n-nitrosonornicotine-enantiomers-in-human-urine-by-chiral-stationary-phase-liquid-chromatography-nanoelectrospray-ionization-high-resolution-tandem-mass-spectrometry
#18
Jing Yang, Steven G Carmella, Stephen S Hecht
We have developed a chiral stationary phase liquid chromatography-nanoelectrospray ionization-high resolution tandem mass spectrometry (LC-NSI-HRMS/MS) method to investigate the enantiomeric composition of low parts per trillion amounts of the carcinogen N'-nitrosonornicotine (NNN) in the urine of cigarette smokers and smokeless tobacco users. (S)-NNN is the major enantiomer in tobacco and is more carcinogenic than (R)-NNN in rats, but no data are available on the enantiomeric composition of NNN in humans. The method used [(13)C6]NNN as an internal standard and [pyridine-D4]nornicotine to monitor possible artifactual formation of NNN, which was found to be less than 2% of the quantified NNN...
January 9, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28107365/parenclitic-network-analysis-of-methylation-data-for-cancer-identification
#19
Alexander Karsakov, Thomas Bartlett, Artem Ryblov, Iosif Meyerov, Mikhail Ivanchenko, Alexey Zaikin
We make use of ideas from the theory of complex networks to implement a machine learning classification of human DNA methylation data, that carry signatures of cancer development. The data were obtained from patients with various kinds of cancers and represented as parenclictic networks, wherein nodes correspond to genes, and edges are weighted according to pairwise variation from control group subjects. We demonstrate that for the 10 types of cancer under study, it is possible to obtain a high performance of binary classification between cancer-positive and negative samples based on network measures...
2017: PloS One
https://www.readbyqxmd.com/read/28107308/acute-right-heart-failure-after-hemorrhagic-shock-and-trauma-pneumonectomy-a-management-approach-a-blinded-randomized-controlled-animal-trial-using-inhaled-nitric-oxide
#20
Andrea L Lubitz, Lars O Sjoholm, Amy Goldberg, Abhijit Pathak, Thomas Santora, Thomas E Sharp, Markus Wallner, Remus M Berretta, Lauren A Poole, Jichuan Wu, Marla R Wolfson
BACKGROUND: Hemorrhagic shock and pneumonectomy causes an acute increase in pulmonary vascular resistance (PVR). The increase in PVR and right ventricular (RV) afterload leads to acute RV failure, thus reducing left ventricular (LV) preload and output. Inhaled nitric oxide (iNO) lowers PVR by relaxing pulmonary arterial smooth muscle without remarkable systemic vascular effects. We hypothesized that with hemorrhagic shock and pneumonectomy, iNO can be used to decrease PVR and mitigate right heart failure...
February 2017: Journal of Trauma and Acute Care Surgery
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