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https://www.readbyqxmd.com/read/28445928/regulation-of-angiogenic-behaviors-by-oxytocin-receptor-through-gli1-indcued-transcription-of-hif-1%C3%AE-in-human-umbilical-vein-endothelial-cells
#1
Ji Zhu, Huiyan Wang, Xiaoyan Zhang, Yin Xie
Angiogenesis is a dynamic hypoxia-stimulated process playing a key role in tissue growth and repair under various pathophysiological circumstances. Abnormal angiogenesis contributes to the pathogenesis of many human diseases. Oxytocin receptor is a classical G-protein-coupled receptor expressed on endothelial cells. The present study was aimed to investigate how oxytocin receptor regulated the angiogenic behaviors of human umbilical vein endothelial cells (HUVECs). We found that oxytocin at 0.1μM significantly increased cell proliferation, upregulated the mRNA and protein expression of CD31 and vWF (two important endothelial markers), and enhanced the tuber formation capacity in HUVECs...
April 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28445757/action-of-antimicrobial-peptides-on-bacterial-and-lipid-membranes-a-direct-comparison
#2
Joseph E Faust, Pei-Yin Yang, Huey W Huang
The bacterial membrane represents an attractive target for the design of new antibiotics to combat widespread bacterial resistance. Understanding how antimicrobial peptides (AMPs) and other membrane-active agents attack membranes could facilitate the design of new, effective antimicrobials. Despite intense study of AMPs on model membranes, we do not know how well the mechanism of attack translates to real biological membranes. To that end, we have characterized the attack of AMPs on Escherichia coli cytoplasmic membranes and directly compared this action to model membranes...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445734/opposing-actions-of-fgf8a-on-notch-signaling-distinguish-two-muller-glial-cell-populations-that-contribute-to-retina-growth-and-regeneration
#3
Jin Wan, Daniel Goldman
The teleost retina grows throughout life and exhibits a robust regenerative response following injury. Critical to both these events are Muller glia (or, Muller glial cells; MGs), which produce progenitors for retinal growth and repair. We report that Fgf8a may be an MG niche factor that acts through Notch signaling to regulate spontaneous and injury-dependent MG proliferation. Remarkably, forced Fgf8a expression inhibits Notch signaling and stimulates MG proliferation in young tissue but increases Notch signaling and suppresses MG proliferation in older tissue...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28445285/association-between-vitamin-d-receptor-bsmi-polymorphism-and-bone-mineral-density-in-pediatric-patients-a-meta-analysis-and-systematic-review-of-observational-studies
#4
Li Bao, Mingzhi Chen, Yong Lei, Zemin Zhou, Huiping Shen, Feng Le
BACKGROUND: Vitamin D and the vitamin D receptor (VDR) are important in the metabolic processes that affect bone mineral density (BMD). However, the effect of VDR BsmI polymorphism on BMD in pediatric patients is still unclear. METHODS: Eligible studies were identified from the following electronic databases: PubMed, Embase, the Cochrane Library, and the Chinese CNKI and Wanfang databases before October 1, 2016. Data were extracted from the eligible studies, and associations between VDR BsmI polymorphism and BMD in pediatric patients were estimated with weighted mean differences (WMDs) and 95% confidence intervals (CIs)...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28445267/different-clinical-presentations-of-choledochal-cyst-among-infants-and-older-children-a-10-year-retrospective-study
#5
Davoud Badebarin, Saeid Aslanabadi, Amir Teimouri-Dereshki, Masoud Jamshidi, Tuba Tarverdizadeh, Kaveh Shad, Kamyar Ghabili, Ghazal Khajir
Choledochal cyst is a rare and often benign congenital cystic dilation throughout the biliary tree. Due to the benign nature of choledochal cyst among early-diagnosed patients, the clinical assumption and diagnosis seem to be of utmost significance. Therefore, we sought to assess different clinical manifestations of choledochal cyst and relevant laboratory findings in infants and older children.Retrospectively, medical records of all patients with the diagnosis of choledochal cyst between 2005 and 2015 were reviewed...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28445249/study-on-the-mechanisms-of-seizure-like-events-suppression-effect-by-electrical-stimulation-using-a-microelectrode-array
#6
Sora Ahn, Sumin Jo, Sang Beom Jun, Hyang Woon Lee, Seungjun Lee
In this paper, we studied the mechanisms underlying the suppression of seizure-like events (SLEs) by electrical stimulation. We conducted an in-vitro experiment using entorhinal cortex combined hippocampal slices and two convulsant drugs, bicuculline and 4-aminopyridine, to induce spontaneous SLEs. We used a microelectrode array to observe network dynamics over the entire hippocampal area simultaneously, including regions far from the stimulation site. We stimulated the entorhinal cortex region, which has been determined to be a focus of SLEs by Granger causality analysis of multichannel time series data, by an external electrode...
April 25, 2017: Neuroreport
https://www.readbyqxmd.com/read/28445205/inhibition-of-microrna-429-in-the-renal-medulla-increased-salt-sensitivity-of-blood-pressure-in-sprague-dawley-rats
#7
Qing Zhu, Junping Hu, Lei Wang, Weili Wang, Zhengchao Wang, Pin-Lan Li, Krishna M Boini, Ningjun Li
BACKGROUND: We have previously shown that high salt intake suppresses the expression of prolyl hydroxylase domain-containing protein 2 (PHD2), an enzyme promoting the degradation of hypoxia-inducible factor (HIF)-1α, and increases HIF-1α along with its target genes in the renal medulla, which promotes sodium excretion and regulate salt sensitivity of blood pressure. However, it remains unknown how high salt inhibits the expression of PHD2. METHOD AND RESULTS: The current study first revealed that high-salt-induced PHD2 inhibition was due to the enhanced decay of mRNA...
April 25, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28445133/baicalein-decreases-uric-acid-and-prevents-hyperuricemic-nephropathy-in-mice
#8
Xiaolu Meng, Zhuo Mao, Xin Li, Dandan Zhong, Min Li, Yingli Jia, Jing Wei, Baoxue Yang, Hong Zhou
Baicalein, a natural flavonoid, is structurally advantageous for binding to xanthine oxidoreductase. In our study, molecular docking analysis and Surface Plasmon Resonance revealed a direct interaction between baicalein and xanthine oxidoreductase. Moreover, 50 mg/kg/d baicalein treatment significantly suppressed the viability of xanthine oxidoreductase in hyperuricemia mouse model. The data showed that baicalein remarkably prevented renal dysfunction, ameliorated kidney fibrosis, alleviated epithelial-mesenchymal transition and oxidative stress in hyperuricemia mice...
April 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445044/highly-oxygenated-multifunctional-compounds-in-%C3%AE-pinene-secondary-organic-aerosol
#9
Xuan Zhang, Andrew T Lambe, Mary Alice Upshur, William A Brooks, Ariana Gray Be, Regan J Thomson, Franz M Geiger, Jason Douglas Surratt, Zhenfa Zhang, Avram Gold, Stephan Graf, Michael J Cubison, Michael Groessl, John T Jayne, Douglas R Worsnop, Manjula R Canagaratna
Highly oxygenated multifunctional organic compounds (HOMs) originating from biogenic emissions constitute a widespread source of organic aerosols in the pristine atmosphere. Yet, the molecular forms in which HOMs are present in the condensed phase upon gas-particle partitioning remain unclear. In this study, we show that highly oxygenated molecules that contain multiple peroxide functionalities are readily cationized by the attachment of Na(+) during electrospray ionization operated in the positive ion mode...
April 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28444966/correlation-between-genetic-polymorphisms-within-the-mapk1-hif-1-ho-1-signaling-pathway-and-risk-or-prognosis-of-perimenopausal-coronary-artery-disease
#10
Nan Guo, Nan Zhang, Liqiu Yan, Xufen Cao, Jiawang Wang, Yunfei Wang
BACKGROUND: Mitogen-activated protein kinase-1 (MAPK1), as well as its downstream factors of hypoxia-inducible factor-1 (HIF-1) and heme oxygenase-1 (HO-1), have been documented to be involved in modulating development of coronary artery disease (CAD). HYPOTHESIS: Genetic mutations within the MAPK1/HIF-1/HO-1 signaling pathway could alter the risk of perimenopausal CAD in Chinese patients. METHODS: Peripheral blood samples were gathered from 589 CAD patients and 860 healthy controls, and 12 potential single-nucleotide polymorphisms (SNPs) were obtained from HapMap database and previously published studies...
April 26, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28444847/complement-dependence-of-murine-costimulatory-blockade-resistant-cellular-cardiac-allograft-rejection
#11
Nicholas Chun, Robert L Fairchild, Yansui Li, Jinhua Liu, Ming Zhang, William M Baldwin, Peter S Heeger
Building upon studies showing that ischemia/reperfusion-(IR)-injury is complement-dependent, we tested links among complement activation, transplant associated ischemia-reperfusion injury, and murine cardiac allograft rejection. We transplanted BALB/c hearts subjected to 8h cold ischemic storage (CIS) into CTLA4Ig-treated WT or c3(-/-) B6 recipients. Whereas allografts subjected to 8h CIS rejected in WT recipients with a median survival time (MST) of 37d, identically treated hearts survived >60d in c3(-/-) mice (p<0...
April 26, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28444832/real-time-activation-of-central-cholinergic-circuits-during-recognition-memory
#12
Sonia Bonnì, Viviana Ponzo, Francesco Di Lorenzo, Carlo Caltagirone, Giacomo Koch
Short Latency Afferent Inhibition (SAI) is a paired-pulse Transcranial Magnetic Stimulation (TMS) protocol that consists in the inhibition of the Motor Evoked Potentials (MEPs) by afferent sensory impulses. SAI is thought to be mediated by cholinergic projections over M1 and can be considered a putative marker of central cholinergic activity. It's known that memory processes are regulated by acetylcholine. Nonetheless the influence of memory tasks on SAI has not been investigated. Here we tested changes in SAI circuits in healthy subjects performing a computerized non-verbal recognition memory task (RMT) requiring to recognize previously encoded faces...
April 26, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28444636/modulatory-effects-of-perineuronal-oligodendrocytes-on-neuronal-activity-in-the-rat-hippocampus
#13
Yoshihiko Yamazaki, Yasukazu Hozumi, Kenya Kaneko, Satoshi Fujii
Action potentials are fundamental to relaying information from region to region in the nervous system. Changes in action potential firing patterns in neural circuits influence how the brain processes information. In our previous study, we focused on interneuron/perineuronal astrocyte pairs in the hippocampal CA1 region and reported that direct depolarization of perineuronal astrocytes modulated the firing pattern of interneurons. In the current study, we investigated the morphological and electrophysiological properties of perineuronal oligodendrocytes, and examined their modulatory effects on interneuronal firing in the CA1 region...
April 25, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28444472/the-effect-of-sodium-glucose-co-transporter-2-sglt-2-inhibitors-on-cardiometabolic-profile-beyond-the-hypoglycaemic-action
#14
Eirini Lioudaki, Emmanouil S Androulakis, Martin Whyte, Konstantinos G Stylianou, Eugenios K Daphnis, Emmanouil S Ganotakis
Type 2 diabetes mellitus (T2DM) has growing prevalence worldwide and major clinical implications, chiefly cardiovascular (CV) and renal disease burden. Sodium-glucose co-transporter (SGLT)-2 inhibitors are a new drug class in the management of T2DM with a mechanism of action independent of insulin. In addition to their hypoglycaemic effect, SGLT-2 inhibitors appear to have haemodynamic and nephroprotective effects. Studies have consistently showed a modest but significant blood pressure (BP) reduction. Metabolic benefits are also attributed to SGLT-2 inhibitors with a modest but consistent body weight decrease recorded along with improvements in lipid profile and uric acid levels...
April 25, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28444290/low-density-lipoproteins-cause-atherosclerotic-cardiovascular-disease-1-evidence-from-genetic-epidemiologic-and-clinical-studies-a-consensus-statement-from-the-european-atherosclerosis-society-consensus-panel
#15
Brian A Ference, Henry N Ginsberg, Ian Graham, Kausik K Ray, Chris J Packard, Eric Bruckert, Robert A Hegele, Ronald M Krauss, Frederick J Raal, Heribert Schunkert, Gerald F Watts, Jan Borén, Sergio Fazio, Jay D Horton, Luis Masana, Stephen J Nicholls, Børge G Nordestgaard, Bart van de Sluis, Marja-Riitta Taskinen, Lale Tokgözoglu, Ulf Landmesser, Ulrich Laufs, Olov Wiklund, Jane K Stock, M John Chapman, Alberico L Catapano
Aims: To appraise the clinical and genetic evidence that low-density lipoproteins (LDLs) cause atherosclerotic cardiovascular disease (ASCVD). Methods and results: We assessed whether the association between LDL and ASCVD fulfils the criteria for causality by evaluating the totality of evidence from genetic studies, prospective epidemiologic cohort studies, Mendelian randomization studies, and randomized trials of LDL-lowering therapies. In clinical studies, plasma LDL burden is usually estimated by determination of plasma LDL cholesterol level (LDL-C)...
April 24, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28444180/left-bundle-branch-block-from-cardiac-mechanics-to-clinical-and-diagnostic-challenges
#16
Elena Surkova, Luigi P Badano, Roberto Bellu, Patrizia Aruta, Federica Sambugaro, Gabriella Romeo, Federico Migliore, Denisa Muraru
Left bundle branch block (LBBB) results in an altered pattern of left ventricular (LV) activation and subsequent contraction, causing remarkable changes in LV mechanics, perfusion and workload and ultimately leading to pathologic cardiac remodelling. Clinical and diagnostic notions about the LBBB phenomenon had evolved from just an electrocardiographic pattern to a critically important finding affecting diagnostic and clinical management of many patients and adversely influencing their outcomes. Recent advances in imaging techniques significantly improved the assessment of patients with LBBB and provided additional insights into pathophysiological mechanisms of LV remodelling...
April 20, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28443459/astragaloside-iv-sensitizes-non-small-cell-lung-cancer-cells-to-gefitinib-potentially-via-regulation-of-sirt6
#17
Peng-Chen Dai, De-Ling Liu, Lei Zhang, Jia Ye, Qing Wang, Hong-Wen Zhang, Xiu-Hua Lin, Guo-Xiang Lai
Astragaloside IV, the active component of Astragalus membranaceus, exhibits diverse biological roles including the anti-tumor activity. In this study, we evaluated the chemosensitive role of astragaloside IV in non-small cell lung cancer cells. Cell Counting Kit-8 analysis was performed to determine cell viability. Real-time polymerase chain reaction and western blot were used to measure the messenger RNA and protein expression. Results showed that astragaloside IV treatment could suppress the proliferation of non-small cell lung cancer cells...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28443336/mop-mo2c-c-a-new-combination-of-electrocatalysts-for-highly-efficient-hydrogen-evolution-over-all-ph-range
#18
Lu-Nan Zhang, Siheng Li, Hua-Qiao Tan, Shifa Ullah Khan, Yuan-Yuan Ma, Hong-Ying Zang, Yonghui Wang, Yang-Guang Li
During the exploration of highly efficient noble-metal-free electrocatalysts for hydrogen evolution reaction (HER), a promising and challenging strategy is to fabricate composite nanocatalysts by finely tuning metal and/or non-metal element components. Herein, we report a new HER electrocatalyst, which is composed of molybdenum phosphide and molybdenum carbide composite nanoparticles (NPs) coated by few-layer N-doped graphitic carbon shells (denoted as MoP/Mo2C@C). Such a new combination mode of electrocatalysts is realized by a one-step annealing route with the mixture of a Mo/P-based polyoxometalate (POM) and dicyandiamide...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28443288/rubisco-activases-aaa-chaperones-adapted-to-enzyme-repair
#19
REVIEW
Javaid Y Bhat, Gabriel Thieulin-Pardo, F Ulrich Hartl, Manajit Hayer-Hartl
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), the key enzyme of the Calvin-Benson-Bassham cycle of photosynthesis, requires conformational repair by Rubisco activase for efficient function. Rubisco mediates the fixation of atmospheric CO2 by catalyzing the carboxylation of the five-carbon sugar ribulose-1,5-bisphosphate (RuBP). It is a remarkably inefficient enzyme, and efforts to increase crop yields by bioengineering Rubisco remain unsuccessful. This is due in part to the complex cellular machinery required for Rubisco biogenesis and metabolic maintenance...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28443208/roles-of-rap1-signaling-in-tumor-cell-migration-and-invasion
#20
Yi-Lei Zhang, Ruo-Chen Wang, Ken Cheng, Brian Z Ring, Li Su
Ras-associated protein-1 (Rap1), a small GTPase in the Ras-related protein family, is an important regulator of basic cellular functions (e.g., formation and control of cell adhesions and junctions), cellular migration, and polarization. Through its interaction with other proteins, Rap1 plays many roles during cell invasion and metastasis in different cancers. The basic function of Rap1 is straightforward; it acts as a switch during cellular signaling transduction and regulated by its binding to either guanosine triphosphate (GTP) or guanosine diphosphate (GDP)...
February 2017: Cancer Biology & Medicine
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