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https://www.readbyqxmd.com/read/27933000/in-depth-study-of-the-interaction-sensitivity-and-gating-modulation-by-pufas-on-k-channels-interaction-and-new-targets
#1
REVIEW
Cristina Moreno, Alicia de la Cruz, Carmen Valenzuela
Voltage gated potassium channels (KV) are membrane proteins that allow selective flow of K(+) ions in a voltage-dependent manner. These channels play an important role in several excitable cells as neurons, cardiomyocytes, and vascular smooth muscle. Over the last 20 years, it has been shown that omega-3 polyunsaturated fatty acids (PUFAs) enhance or decrease the activity of several cardiac KV channels. PUFAs-dependent modulation of potassium ion channels has been reported to be cardioprotective. However, the precise cellular mechanism underlying the cardiovascular benefits remained unclear in part because new PUFAs targets and signaling pathways continue being discovered...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27932351/telomerase-reverse-transcriptase-deficiency-prevents-neointima-formation-through-chromatin-silencing-of-e2f1-target-genes
#2
Elizabeth B Endorf, Hua Qing, Jun Aono, Naoto Terami, Geneviève Doyon, Eric Hyzny, Karrie L Jones, Hannes M Findeisen, Dennis Bruemmer
OBJECTIVE: Aberrant proliferation of smooth muscle cells (SMC) in response to injury induces pathological vascular remodeling during atherosclerosis and neointima formation. Telomerase is rate limiting for tissue renewal and cell replication; however, the physiological role of telomerase in vascular diseases remains to be determined. The goal of the present study was to determine whether telomerase reverse transcriptase (TERT) affects proliferative vascular remodeling and to define the molecular mechanism by which TERT supports SMC proliferation...
December 8, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27930741/correction-safety-of-seasonal-malaria-chemoprevention-smc-with-sulfadoxine-pyrimethamine-plus-amodiaquine-when-delivered-to-children-under-10-years-of-age-by-district-health-services-in-senegal-results-from-a-stepped-wedge-cluster-randomized-trial
#3
J L NDiaye, B Cissé, E H Ba, J F Gomis, C T Ndour, J F Molez, F B Fall, C Sokhna, B Faye, E Kouevijdin, F K Niane, M Cairns, J F Trape, C Rogier, O Gaye, B M Greenwood, P J M Milligan
[This corrects the article DOI: 10.1371/journal.pone.0162563.].
2016: PloS One
https://www.readbyqxmd.com/read/27928377/macular-thickness-in-subjective-memory-complaints-and-mild-cognitive-impairment-a-non-invasive-biomarker
#4
Domingo Giménez Castejón, Miriama Dudekova, Maria Gómez Gallego, Jerónimo Lajara Blesa
Alzheimer's disease (AD) is the main cause of dementia worldwide, which implies an important socioeconomic problem in developed countries. Efforts to find biomarkers to diagnose AD have been intensified, especially, to detect cognitive impairment in its early stages, also known as mild cognitive impairment (MCI). Besides, there are individuals referring memory loss that is unnoticeable in the family environment and presenting normal neuropsychological tests. The former patients are included in a clinical picture that has been recently called subjective memory complaints (SMC)...
February 2016: Neuro-ophthalmology
https://www.readbyqxmd.com/read/27924152/molecular-characterization-of-a-rare-analphoid-supernumerary-marker-chromosome-derived-from-7q35%C3%A2-%C3%A2-%C3%A2-qter-a-case-report
#5
Bárbara Marques, Cristina Ferreira, Filomena Brito, Sónia Pedro, Cristina Alves, Teresa Lourenço, Marta Amorim, Hildeberto Correia
BACKGROUND: Analphoid supernumerary marker chromosomes (aSMC) constitute one of the smallest groups of SMC, and are characterized by a centromeric constriction but no detectable alpha-satellite DNA. These marker chromosomes cannot be properly identified by conventional banding techniques alone, and molecular cytogenetic methods are necessary for a detailed characterization. Analphoid SMC derived from chromosome 7 are extremely rare, with only five cases reported so far. CASE PRESENTATION: In this work we report an aSMC involving the terminal long arm of chromosome 7 in a 10-year-old boy with multiple dysmorphic features and severe development delay...
2016: Molecular Cytogenetics
https://www.readbyqxmd.com/read/27923978/smooth-muscle-cell-specific-tgfbr1-deficiency-attenuates-neointimal-hyperplasia-but-promotes-an-undesired-vascular-phenotype-for-injured-arteries
#6
Mingmei Liao, Pu Yang, Fen Wang, Scott A Berceli, Yasmin H Ali, Kelvin L Chan, Zhihua Jiang
Neointimal hyperplasia (NIH) and inward wall remodeling cause arterial restenosis and failure of bypass vein grafts. Previous studies from our group suggest that transforming growth factor (TGF) β promotes these pathologies via regulating cell kinetics at the early stage and matrix metabolism at the late stage. Although these temporal TGFβ effects may result from its signaling in different cell groups, the responsible cell type has not been identified. In the current study, we evaluated the effect of smooth muscle cell (SMC)-specific TGFβ signaling through its type I receptor TGFBR1 on NIH and wall remodeling of the injured femoral arteries (FAs)...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/27923320/3d-co-culture-model-to-analyze-the-crosstalk-between-endothelial-and-smooth-muscle-cells
#7
Minu Karthika Ganesan, Richard Finsterwalder, Heide Leb, Ulrike Resch, Karin Neumüller, Rainer de Martin, Peter Petzelbauer
The response of blood vessels to physiological and pathological stimuli partly depends on the crosstalk between endothelial cells (EC) lining the luminal side and smooth muscle cells (SMC) building the inner part of the vascular wall. Thus, the in vitro analysis of the pathophysiology of blood vessels requires co-culture systems of EC and SMC. We have developed and validated a modified 3D sandwich co-culture (3D SW-CC) of EC and SMC employing open µ-Slides with a thin glass bottom allowing direct imaging. The culture dish comprises of an intermediate plate to minimize the meniscus resulting in homogenous cell distribution...
December 6, 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27922693/a-novel-pdgf-receptor-inhibitor-eluting-stent-attenuates-in-stent-neointima-formation-in-a-rabbit-carotid-model
#8
Chen Huang, Haijun Mei, Min Zhou, Xiaobing Zheng
A novel drug-eluting stent (DES) is required to target vascular smooth muscle cells (SMCs) without harming endothelial cells (ECs). Platelet-derived growth factor (PDGF) is critical for the proliferation and migration of SMCs. Sunitinib [a PDGF receptor (PDGFR) tyrosine kinase inhibitor]‑eluting stents may therefore inhibit neointimal formation. The aim of the present study was to examine the stent‑based delivery of sunitinib in a rabbit carotid model; in addition, the effects of sunitinib were evaluated in vitro...
December 5, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27919930/mir-17-20-controls-prolyl-hydroxylase-2-phd2-hypoxia-inducible-factor-1-hif1-to-regulate-pulmonary-artery-smooth-muscle-cell-proliferation
#9
Tianji Chen, Qiyuan Zhou, Haiyang Tang, Melike Bozkanat, Jason X-J Yuan, J Usha Raj, Guofei Zhou
BACKGROUND: Previously we found that smooth muscle cell (SMC)-specific knockout of miR-17~92 attenuates hypoxia-induced pulmonary hypertension. However, the mechanism underlying miR-17~92-mediated pulmonary artery SMC (PASMC) proliferation remains unclear. We sought to investigate whether miR-17~92 regulates hypoxia-inducible factor (HIF) activity and PASMC proliferation via prolyl hydroxylases (PHDs). METHODS AND RESULTS: We show that hypoxic sm-17~92(-/-) mice have decreased hematocrit, red blood cell counts, and hemoglobin contents...
December 5, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27916002/long-term-effect-of-stents-eluting-6-mercaptopurine-in-porcine-coronary-arteries
#10
Matthijs S Ruiter, Albert Doornbos, Vivian de Waard, Robbert J de Winter, Nico J M Attevelt, Rob Steendam, Carlie J M de Vries
BACKGROUND: Drug-eluting stents (DES) have dramatically reduced restenosis rates compared to bare metal stents and are widely used in coronary artery angioplasty. The anti-proliferative nature of the drugs reduces smooth muscle cell (SMC) proliferation effectively, but unfortunately also negatively affects endothelialization of stent struts, necessitating prolonged dual anti-platelet therapy. Cell-type specific therapy may prevent this complication, giving rise to safer stents that do not require additional medication...
December 5, 2016: Journal of Negative Results in Biomedicine
https://www.readbyqxmd.com/read/27913801/the-pressure-reduction-coefficient-a-new-parameter-to-assess-aneurysmal-blood-stasis-induced-by-flow-diverters-disruptors
#11
Gregory Gascou, Riccardo Ferrara, Dominique Ambard, Mathieu Sanchez, Kyriakos Lobotesis, Franck Jourdan, Vincent Costalat
BACKGROUND AND PURPOSE: Pore density (PD), surface metal coverage (SMC) and the number of wires are all different parameters which can influence the efficacy of a flow disruptor/diverter. Nevertheless, the relative importance of a parameter to induce intra-aneurysmal blood stasis is still poorly evaluated. Therefore, comparison between devices based on a unique value is not reliable. The aim of this study was to propose a new bench top parameter (the pressure reduction coefficient (PRC; ξ)) in order to assess the global haemodynamic effect of each flow diverter/disruptor to slow flow...
December 2, 2016: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27911586/mirna-181a-b-regulates-phenotypes-of-vessel-smooth-muscle-cells-through-serum-response-factor
#12
Xiaoxing Wei, Xue Hou, Jianhua Li, Yongnian Liu
The phenotypic modulation of vessel smooth muscle cells (VSMCs) plays a crucial role in the physiological and pathological conditions of vasculature in response to local environmental changes. The phenotypic transition of VSMCs is largely modulated by the serum response factor (SRF). MiR-181a and miR-181b are members of the well-studied miR-181 family and both have complementary sequence in the 3' untranslated region (UTR) of SRF gene. In this article, evidence insinuates that miR-181a/b was involved in VSMCs differentiation through upregulating synthetic marker genes and downregulating contractile ones, respectively...
December 2, 2016: DNA and Cell Biology
https://www.readbyqxmd.com/read/27909798/the-loading-of-condensin-in-the-context-of-chromatin
#13
REVIEW
Xavier Robellet, Vincent Vanoosthuyse, Pascal Bernard
The packaging of DNA into chromosomes is a ubiquitous process that enables living organisms to structure and transmit their genome accurately through cell divisions. In the three kingdoms of life, the architecture and dynamics of chromosomes rely upon ring-shaped SMC (Structural Maintenance of Chromosomes) condensin complexes. To understand how condensin rings organize chromosomes, it is essential to decipher how they associate with chromatin filaments. Here, we use recent evidence to discuss the role played by nucleosomes and transcription factors in the loading of condensin at transcribed genes...
December 1, 2016: Current Genetics
https://www.readbyqxmd.com/read/27898699/facilitators-and-barriers-to-uptake-of-an-extended-seasonal-malaria-chemoprevention-programme-in-ghana-a-qualitative-study-of-caregivers-and-community-health-workers
#14
Gifty D Antwi, Laura A Bates, Rebecca King, Princess R Mahama, Harry Tagbor, Matt Cairns, James N Newell
BACKGROUND: Seasonal Malaria Chemoprevention (SMC) is currently recommended for children under five in areas where malaria transmission is highly seasonal. We explored children's caregivers' and community health workers' (CHWs) responses to an extended 5-month SMC programme. METHODS: Thirteen in-depth interviews and eight focus group discussions explored optimal and suboptimal 'uptake' of SMC to examine facilitators and barriers to caregivers' uptake. RESULTS: There did not appear to be major differences between caregivers of children with optimal and sub-optimal SMC uptake in terms of their knowledge of malaria, their perceptions of the effect of SMC on a child's health, nor their understanding of chemoprevention...
2016: PloS One
https://www.readbyqxmd.com/read/27893734/an-ipsc-derived-vascular-model-of-marfan-syndrome-identifies-key-mediators-of-smooth-muscle-cell-death
#15
Alessandra Granata, Felipe Serrano, William George Bernard, Madeline McNamara, Lucinda Low, Priya Sastry, Sanjay Sinha
Marfan syndrome (MFS) is a heritable connective tissue disorder caused by mutations in FBN1, which encodes the extracellular matrix protein fibrillin-1. To investigate the pathogenesis of aortic aneurysms in MFS, we generated a vascular model derived from human induced pluripotent stem cells (MFS-hiPSCs). Our MFS-hiPSC-derived smooth muscle cells (SMCs) recapitulated the pathology seen in Marfan aortas, including defects in fibrillin-1 accumulation, extracellular matrix degradation, transforming growth factor-β (TGF-β) signaling, contraction and apoptosis; abnormalities were corrected by CRISPR-based editing of the FBN1 mutation...
November 28, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27893405/second-order-consensus-in-multiagent-systems-via-distributed-sliding-mode-control
#16
Wenwu Yu, He Wang, Fei Cheng, Xinghuo Yu, Guanghui Wen
In this paper, the new decoupled distributed sliding-mode control (DSMC) is first proposed for second-order consensus in multiagent systems, which finally solves the fundamental unknown problem for sliding-mode control (SMC) design of coupled networked systems. A distributed full-order sliding-mode surface is designed based on the homogeneity with dilation for reaching second-order consensus in multiagent systems, under which the sliding-mode states are decoupled. Then, the SMC is applied to the decoupled sliding-mode states to reach their origin in finite time, which is the sliding-mode surface...
November 22, 2016: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/27889619/selective-motor-control-correlates-with-gait-abnormality-in-children-with-cerebral-palsy
#17
Emily Chruscikowski, Nicola R D Fry, Jonathan J Noble, Martin Gough, Adam P Shortland
Children with bilateral cerebral palsy (CP) commonly have limited selective motor control (SMC). This affects their ability to complete functional tasks. The impact of impaired SMC on walking has yet to be fully understood. Measures of SMC have been shown to correlate with specific characteristics of gait, however the impact of SMC on overall gait pattern has not been reported. This study explored SMC data collected as part of routine gait analysis in children with bilateral CP. As part of their clinical assessment, SMC was measured with the Selective Control Assessment of the Lower Extremities (SCALE) in 194 patients with bilateral cerebral palsy attending for clinical gait analysis at a single centre...
November 19, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27889450/rpa-mediates-recruitment-of-mrx-to-forks-and-double-strand-breaks-to-hold-sister-chromatids-together
#18
Andrew Seeber, Anna Maria Hegnauer, Nicole Hustedt, Ishan Deshpande, Jérôme Poli, Jan Eglinger, Philippe Pasero, Heinz Gut, Miki Shinohara, Karl-Peter Hopfner, Kenji Shimada, Susan M Gasser
The Mre11-Rad50-Xrs2 (MRX) complex is related to SMC complexes that form rings capable of holding two distinct DNA strands together. MRX functions at stalled replication forks and double-strand breaks (DSBs). A mutation in the N-terminal OB fold of the 70 kDa subunit of yeast replication protein A, rfa1-t11, abrogates MRX recruitment to both types of DNA damage. The rfa1 mutation is functionally epistatic with loss of any of the MRX subunits for survival of replication fork stress or DSB recovery, although it does not compromise end-resection...
December 1, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27889204/tauroursodeoxycholic-acid-attenuates-angiotensin-ii-induced-abdominal-aortic-aneurysm-formation-in-apolipoprotein-e-deficient-mice-by-inhibiting-endoplasmic-reticulum-stress
#19
Y Qin, Y Wang, O Liu, L Jia, W Fang, J Du, Y Wei
OBJECTIVE/BACKGROUND: Abdominal aortic aneurysm (AAA) is characterised by the infiltration of smooth muscle cell (SMC) apoptosis, inflammatory cells, neovascularisation, and degradation of the extracellular matrix. Previous work has shown that endoplasmic reticulum (ER) stress and SMC apoptosis were increased both in a mouse model and human thoracic aortic aneurysm. However, whether the ER stress is activated in AAA formation and whether suppressing ER stress attenuates AAA is unknown...
November 24, 2016: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/27888004/unliganded-estrogen-receptor-alpha-regulates-vascular-cell-function-and-gene-expression
#20
Qing Lu, Gavin R Schnitzler, Caroline S Vallaster, Kazutaka Ueda, Stephanie Erdkamp, Christine E Briggs, Lakshmanan K Iyer, Iris Z Jaffe, Richard H Karas
The unliganded form of the estrogen receptor is generally thought to be inactive. Our prior studies, however, suggested that unliganded estrogen receptor alpha (ERα) exacerbates adverse vascular injury responses in mice. Here, we show that the presence of unliganded ERα decreases vascular endothelial cell (EC) migration and proliferation, increases smooth muscle cell (SMC) proliferation, and increases inflammatory responses in cultured ECs and SMCs. Unliganded ERα also regulates many genes in vascular ECs and mouse aorta...
November 22, 2016: Molecular and Cellular Endocrinology
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