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https://www.readbyqxmd.com/read/27919949/1%C3%AE-dihydroxyvitamin-d3-and-retinoic-acid-increase-nuclear-vitamin-d-receptor-expression-in-monocytic-thp-1-cells
#1
Hikaru Uchida, Yuichiro Hasegawa, Hiromichi Takahashi, Makoto Makishima
BACKGROUND: 1α,25-Dihydroxyvitamin D3 [1,25(OH)2D3] and retinoic acid, such as all-trans retinoic acid (ATRA) and 9-cis retinoic acid (9cRA), are known to induce differentiation of myeloid leukemia cells. Combined treatment effectively enhances the differentiation effect, particularly in monocytic leukemia cells. The underlying mechanism of this combined effect remains unknown. MATERIALS AND METHODS: THP-1 monocytic leukemia cells were treated with 1,25(OH)2D3 in combination with 9cRA, ATRA or selective synthetic ligand for retinoic acid receptor (RAR) or retinoid X receptor (RXR), and the nuclear expression and function of vitamin D receptor (VDR) were examined...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27911779/retinoic-acid-signaling-determines-the-fate-of-uterine-stroma-in-the-mouse-m%C3%A3-llerian-duct
#2
Tadaaki Nakajima, Taisen Iguchi, Tomomi Sato
The Müllerian duct develops into the oviduct, uterus, and vagina, all of which are quite distinct in their morphology and function. The epithelial fate of these female reproductive organs in developing mice is determined by factors secreted from the stroma; however, how stromal differentiation occurs in the female reproductive organs derived from the Müllerian duct is still unclear. In the present study, roles of retinoic acid (RA) signaling in developing female reproductive tracts were investigated. Retinol dehydrogenase 10 (RDH10) and aldehyde dehydrogenase family 1 subfamily A2 (ALDH1A2) mRNAs and proteins and transactivation activity of endogenous RA were found in the stroma of proximal Müllerian ducts and gradually decreased from the proximal to caudal regions in fetal mice...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911385/application-of-impermeable-barriers-combined-with-candidate-factor-soaked-beads-to-study-inductive-signals-in-the-chick
#3
Susan Wilde, Malcolm P Logan
The chick embryo provides a superb vertebrate model that can be used to dissect developmental questions in a direct way. Its accessibility and robustness following surgical intervention are key experimental strengths. Mica plates were the first barriers used to prevent chick limb bud initiation(1). Protocols that use aluminum foil as an impermeable barrier to wing bud or leg bud induction and or initiation are described. We combine this technique with bead placement lateral to the barrier to exogenously supply candidate endogenous factors that have been blocked by the barrier...
November 17, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27910495/cross-calibration-of-fuji-tr-image-plate-and-rar-2492-x-ray-film-to-determine-the-response-of-a-ditabis-super-micron-image-plate-scanner
#4
G Dunham, E C Harding, G P Loisel, P W Lake, L B Nielsen-Weber
Fuji TR image plate is frequently used as a replacement detector medium for x-ray imaging and spectroscopy diagnostics at NIF, Omega, and Z facilities. However, the familiar Fuji BAS line of image plate scanners is no longer supported by the industry, and so a replacement scanning system is needed. While the General Electric Typhoon line of scanners could replace the Fuji systems, the shift away from photo stimulated luminescence units to 16-bit grayscale Tag Image File Format (TIFF) leaves a discontinuity when comparing data collected from both systems...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27895574/robot-assisted-rehabilitation-of-ankle-plantar-flexors-spasticity-a-3-month-study-with-proprioceptive-neuromuscular-facilitation
#5
Zhihao Zhou, Yao Sun, Ninghua Wang, Fan Gao, Kunlin Wei, Qining Wang
In this paper, we aim to investigate the effect of proprioceptive neuromuscular facilitation (PNF)-based rehabilitation for ankle plantar flexors spasticity by using a Robotic Ankle-foot Rehabilitation System (RARS). A modified robot-assisted system was proposed, and seven poststroke patients with hemiplegic spastic ankles participated in a 3-month robotic PNF training. Their impaired sides were used as the experimental group, while their unimpaired sides as the control group. A robotic intervention for the experimental group started from a 2-min passive stretching to warming-up or relaxing the soleus and gastrocnemius muscles and also ended with the same one...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27874324/interaction-between-radioadaptive-response-and-radiation-induced-bystander-effect-in-caenorhabditis-elegans-a-unique-role-of-the-dna-damage-checkpoint
#6
Huangqi Tang, Liangwen Chen, Lianyun Chen, Bin Chen, Ting Wang, Aifeng Yang, Furu Zhan, Lijun Wu, Po Bian
Although radioadaptive responses (RAR) and radiation-induced bystander effects (RIBE) are two important biological effects of low-dose radiation, there are currently only limited data that directly address their interaction, particularly in the context of whole organisms. In previous studies, we separately demonstrated RAR and RIBE using an in vivo system of C. elegans . In the current study, we further investigated their interaction in C. elegans , with the ratio of protruding vulva as the biological end point for RAR...
November 22, 2016: Radiation Research
https://www.readbyqxmd.com/read/27871331/association-of-dars-gene-polymorphisms-with-the-risk-of-isolated-ventricular-septal-defects-in-the-chinese-han-population
#7
Yu Feng, Runsen Chen, Xuming Mo
BACKGROUND: Ventricular septal defects (VSD) are the most common subtype of congenital heart defects (CHD) and are estimated to account for 20 to 30% of all cases of CHD. The etiology of isolated VSD remains poorly understood. Eight core aminoacyl-tRNA synthetases (ARSs) (EPRS, MARS, QARS, RARS, IARS, LARS, KARS, and DARS) combine with three nonenzymatic components to form a complex known as the multisynthetase complex (MSC). Four single nucleotide polymorphisms (SNPs) in EPRS have been reported to be associated with risks of CHD in Chinese populations...
November 21, 2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27870945/erythropoietin-administration-is-associated-with-improved-t-cell-properties-in-patients-with-myelodysplastic-syndromes
#8
Naamit Deshet-Unger, Howard S Oster, Sara Prutchi-Sagiv, Nir Maaravi, Nataliya Golishevski, Drorit Neumann, Moshe Mittelman
The immune system is impaired in myelodysplastic syndromes (MDS) and plays a role in the pathogenesis of the disease. Here we show effects of recombinant human erythropoietin (rHuEPO) on T cell (CD4(+), CD8(+) and CD4(+)CD25(+)) number and function in MDS patients. Healthy (20 subjects), MDS patients without rHuEPO treatment ('MDS', 13), and MDS patients treated with rHuEPO ('MDS+EPO', 17) were examined. CD4(+) and CD8(+) T cell numbers were reduced and increased respectively in MDS compared to healthy subjects...
November 2, 2016: Leukemia Research
https://www.readbyqxmd.com/read/27856176/identification-of-i-ricinus-i-persulcatus-and-i-trianguliceps-species-by-multiplex-pcr
#9
Kairi Värv, Anna Ivanova, Julia Geller, Jaanus Remm, Kertu Jaik, Nina Tikunova, Vera Rar, Åke Lundkvist, Irina Golovljova
Correct identification of tick species is an essential requirement for any scientific study engaged in tick-associated research. However, morphological identification can lead to misinterpretations, especially when dealing with vector-host research and sub-adult, engorged or damaged specimens. To overcome this limitation, we developed a novel assay to discriminate between Ixodes ricinus, I. persulcatus and I. trianguliceps species collected from rodents or vegetation, using the second internal transcribed spacer (ITS2) as a genetic marker...
November 10, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27843110/-recipients-adverse-reactions-in-the-ibn-sina-hospital-of-rabat-state-1999-2013
#10
S Ouadghiri, C Brick, N Benseffaj, O Atouf, M Essakalli
PURPOSE OF STUDY: The declaration of the recipients adverse reactions (RAR) is one of the field haemovigilance activities. It provides an evaluation of transfusion side effects and thus prevents their appearance. The aim of this study is to analyze, over 14 years, the RAR supports reported in Rabat Ibn Sina hospital. PATIENTS AND METHODS: All of the RAR supports sending to the blood transfusion service were analyzed. The data collected from these supports are: clinical characteristics of the patient, type of incident observed and type of labile blood products (LBP) transfused...
November 11, 2016: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/27830505/non-classical-transcriptional-activity-of-retinoic-acid
#11
Noa Noy
It has long been established that the transcriptional activity of retinoic acid (RA) is mediated by members of the nuclear receptor family of ligand-activated transcription factors termed RA receptors (RARs). More recent observations have established that RA also activates an additional nuclear receptor, PPARβ/δ. Partitioning RA between RARs and PPARβ/δ is governed by different intracellular lipid-binding proteins: cellular RA binding protein 2 (CRABP2) delivers RA to nuclear RARs and a fatty acid binding protein (FABP5) delivers the hormone from the cytosol to nuclear PPARβ/δ...
2016: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/27807503/clinical-management-of-myelodysplastic-syndrome-myeloproliferative-neoplasm-overlap-syndromes
#12
Joseph A Clara, David A Sallman, Eric Padron
The myelodysplastic/myeloproliferative neoplasms (MDS/MPNs) are a unique group of hematologic malignancies characterized by concomitant myelodysplastic and myeloproliferative features. According to the 2008 WHO classification, the category includes atypical chronic myeloid leukemia (aCML), chronic myelomonocytic leukemia (CMML), juvenile myelomonocytic leukemia (JMML), MDS/MPN-unclassifiable (MDS/MPN-U), and the provisional entity refractory anemia with ring sideroblasts and thrombocytosis (RARS-T). Although diagnosis currently remains based on clinicopathologic features, the incorporation of next-generation platforms has allowed for the recent molecular characterization of these diseases which has revealed unique and complex mutational profiles that support their distinct biology and is anticipated to soon play an integral role in diagnosis, prognostication, and treatment...
September 2016: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/27801326/-study-of-abnormal-iron-metabolism-parameters-and-iron-overload-in-patients-with-myelodysplastic-syndromes
#13
L L Song, Q Q Zheng, C Xiao, J Guo, D Wu, J Y Su, L Y Zhou, C K Chang
Objective: To investigate the abnormalities of iron metabolism parameters, the prevalence and risk factors of iron overload and clinical characteristics of patients with myelodysplastic syndromes(MDS). Methods: Retrospective investigation was used to observe abnormal iron metabolism parameters and clinical characteristics of newly diagnosed 94 MDS patients in our center from June 2015 to March 2016. Results: Of 94 patients, 71(75.53%)had a hemoglobin level of less than 100 g/L at diagnosis. Iron overload was observed in 52(55...
October 14, 2016: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/27798106/dna-methylation-independent-removable-insulator-controls-chromatin-remodeling-at-the-hoxa-locus-via-retinoic-acid-signaling
#14
Ko Ishihara, Masafumi Nakamoto, Mitsuyoshi Nakao
Chromatin insulators partition the genome into functional units to control gene expression, particularly in complex chromosomal regions. The CCCTC-binding factor (CTCF) is an insulator-binding protein that functions in transcriptional regulation and higher-order chromatin formation. Variable CTCF-binding sites have been identified to be cell type-specific partly due to differential DNA methylation. Here, we show that DNA methylation-independent removable CTCF insulator is responsible for retinoic acid (RA)-mediated higher-order chromatin remodeling in the human HOXA gene locus...
October 24, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27791279/rar-related-orphan-receptor-gamma-ror-%C3%AE-mediates-epithelial-mesenchymal-transition-of-hepatocytes-during-hepatic-fibrosis
#15
Sung Min Kim, Jung Eun Choi, Wonhee Hur, Jung-Hee Kim, Sung Woo Hong, Eun Byul Lee, Joon Ho Lee, Tian Zhu Li, Pil Soo Sung, Seung Kew Yoon
The epithelial-mesenchymal transition (EMT) is involved in many different types of cellular behavior, including liver fibrosis. In this report, we studied a novel function of RAR-related orphan receptor gamma (ROR-γ) in hepatocyte EMT during liver fibrosis. To induce EMT in vitro, primary hepatocytes and FL83B cells were treated with TGF-β1. Expression of ROR-γ was analyzed by western blot in the fibrotic mouse livers and human livers with cirrhosis. To verify the role of ROR-γ in hepatocyte EMT, we silenced ROR-γ in FL83B cells using a lentiviral short hairpin RNA (shRNA) vector...
October 28, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27789799/the-epigenetic-landscape-of-t-cell-exhaustion
#16
Debattama R Sen, James Kaminski, R Anthony Barnitz, Makoto Kurachi, Ulrike Gerdemann, Kathleen B Yates, Hsiao-Wei Tsao, Jernej Godec, Martin W LaFleur, Flavian D Brown, Pierre Tonnerre, Raymond T Chung, Damien C Tully, Todd M Allen, Nicole Frahm, Georg M Lauer, E John Wherry, Nir Yosef, W Nicholas Haining
Exhausted T cells in cancer and chronic viral infection express distinctive patterns of genes, including sustained expression of programmed cell death protein 1 (PD-1). However, the regulation of gene expression in exhausted T cells is poorly understood. Here, we define the accessible chromatin landscape in exhausted CD8(+) T cells and show that it is distinct from functional memory CD8(+) T cells. Exhausted CD8(+) T cells in humans and a mouse model of chronic viral infection acquire a state-specific epigenetic landscape organized into functional modules of enhancers...
October 27, 2016: Science
https://www.readbyqxmd.com/read/27787652/transcriptional-control-of-apoptotic-cell-clearance-by-macrophage-nuclear-receptors
#17
Tamás Röszer
Apoptotic cell clearance by macrophages is key for normal tissue development and homeostasis. Nuclear receptors, such as peroxisome proliferator activated receptors (PPARs), liver X receptor (LXR), retinoic acid receptor (RAR), retinoid X receptor (RXR) and glucocorticoid receptor (GR) orchestrate this vital process. The underlying mechanism involves the transcriptional control of key genes of apoptotic cell recognition and internalization, such as Cd36, Mertk, Axl, C1qa, Tgm2, Abca1. In addition, apoptotic cell uptake leads to M2 activation of macrophages, and this process is also controlled at the gene transcription level by nuclear receptors...
October 27, 2016: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/27771989/negative-impact-on-clinical-outcome-of-the-mutational-co-occurrence-of-sf3b1-and-dnmt3a-in-refractory-anemia-with-ring-sideroblasts-rars
#18
Iván Martín, Esperanza Such, Blanca Navarro, Ana Vicente, María López-Pavía, Mariam Ibáñez, Mar Tormo, Eva Villamón, Inés Gómez-Seguí, Irene Luna, Silvestre Oltra, Laia Pedrola, Miguel Angel Sanz, Jose Cervera, Guillermo Sanz
The incidence of SF3B1 mutations in patients with RARS is high. Recently, it has been shown that SF3B1 and DNMT3A mutations overlap more often than expected, although it is not clear how this could affect the disease. We studied SF3B1 and DNMT3A in 123 RARS patients: 101 out of 123 samples (82%) had somatic mutations in SF3B1, and 13 of them (13%) showed a co-mutation (SF3B1(mut)DNMT3A(mut)). All co-mutated patients had a normal karyotype, and 12 of them (92%) were lower-risk patients (IPSS and IPSS-R). Despite their favorable profile, SF3B1(mut)DNMT3A(mut) patients showed a higher RBC transfusion dependency (92% versus 48%, p = ...
October 24, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27759632/preoperative-evaluation-of-renal-artery-in-patients-with-renal-tumor-using-noncontrast-enhanced-magnetic-resonance-angiography
#19
Liangsong Zhu, Guangyu Wu, Jianfeng Wang, Jiwei Huang, Wen Kong, Yonghui Chen, Wei Xue, Yiran Huang, Jin Zhang
To investigate the feasibility of the noncontrast-enhanced magnetic resonance angiography (NCE-MRA) to evaluate renal arteries before partial nephrectomy (PN).Retrospective analyzed 479 patients who underwent renal surgery between January 2013 and December 2015 with NCE-MRA or computed tomographic angiography (CTA) renal artery image reconstruction preoperative in our department. The renal artery reconstruction score (RARS) was based on the level of artery visualization in a 4-class criterion, and the R.E.N...
October 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27754752/rhoa-controls-retinoid-signaling-by-rock-dependent-regulation-of-retinol-metabolism
#20
Alberto García-Mariscal, Karine Peyrollier, Astrid Basse, Esben Pedersen, Ralph Rühl, Jolanda van Hengel, Cord Brakebusch
The ubiquitously expressed small GTPase RhoA is essential for embryonic development and mutated in different cancers. Functionally, it is well described as a regulator of the actin cytoskeleton, but its role in gene regulation is less understood. Using primary mouse keratinocytes with a deletion of the RhoA gene, we have now been exploring how the loss of RhoA affects gene expression. Performing transcription factor reporter assays, we found a significantly decreased activity of a RAR luciferase reporter in RhoA-null keratinocytes...
October 18, 2016: Small GTPases
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