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https://www.readbyqxmd.com/read/28424240/the-histone-acetyltransferase-gcn5-positively-regulates-t-cell-activation
#1
Beixue Gao, Qingfei Kong, Yana Zhang, Chawon Yun, Sharon Y R Dent, Jianxun Song, Donna D Zhang, Yiming Wang, Xuemei Li, Deyu Fang
Histone acetyltransferases (HATs) regulate inducible transcription in multiple cellular processes and during inflammatory and immune response. However, the functions of general control nonrepressed-protein 5 (Gcn5), an evolutionarily conserved HAT from yeast to human, in immune regulation remain unappreciated. In this study, we conditionally deleted Gcn5 (encoded by the Kat2a gene) specifically in T lymphocytes by crossing floxed Gcn5 and Lck-Cre mice, and demonstrated that Gcn5 plays important roles in multiple stages of T cell functions including development, clonal expansion, and differentiation...
April 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28386229/clc-channels-and-transporters-structure-physiological-functions-and-implications-in-human-chloride-channelopathies
#2
REVIEW
Diogo R Poroca, Ryan M Pelis, Valérie M Chappe
The discovery of ClC proteins at the beginning of the 1990s was important for the development of the Cl(-) transport research field. ClCs form a large family of proteins that mediate voltage-dependent transport of Cl(-) ions across cell membranes. They are expressed in both plasma and intracellular membranes of cells from almost all living organisms. ClC proteins form transmembrane dimers, in which each monomer displays independent ion conductance. Eukaryotic members also possess a large cytoplasmic domain containing two CBS domains, which are involved in transport modulation...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28369398/oral-streptococcal-endocarditis-oral-hygiene-habits-and-recent-dental-procedures-a-case-control-study
#3
Xavier Duval, Sarah Millot, Catherine Chirouze, Christine Selton-Suty, Vanessa Moby, Pierre Tattevin, Christophe Strady, Edouard Euvrard, Nelly Agrinier, Daniel Thomas, Bruno Hoen, François Alla
Aims: To compare oral hygiene habits, oro-dental status, and dental procedures in patients with infective endocarditis (IE) according to whether the IE-causing microorganism originated in the oral cavity. Methods: We conducted an assessor-blinded case-control study in 6 French tertiary-care hospitals. Oral hygiene habits were recorded using a self-administered questionnaire. Oro-dental status was analysed by trained dental practitioners blinded to the microorganism, using standardized clinical examination and dental panoramic tomography...
March 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28357180/diagnosis-and-treatment-of-dent-disease-in-10-chinese-boys
#4
Guohua He, Hongwen Zhang, Fang Wang, Xiaoyu Liu, Huijie Xiao, Yong Yao
Dent disease is a rare X-linked recessive proximal tubular disorder that affects mostly male patients in childhood or early adult life. Dent disease is clinically characterized by the presence of low molecular weight proteinuria (LMWP), hypercalciuria, medullary nephrocalcinosis, nephrolithiasis, and progressive renal failure. The clinical features, diagnosis, and treatment of Dent disease were examined in 10 Chinese boys. All 10 childhood cases of Dent disease in China presented with tubular proteinuria in the nephrotic range and hypercalciuria...
February 2017: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/28350380/transcriptomic-profiling-of-39-commonly-used-neuroblastoma-cell-lines
#5
Jo Lynne Harenza, Maura A Diamond, Rebecca N Adams, Michael M Song, Heather L Davidson, Lori S Hart, Maiah H Dent, Paolo Fortina, C Patrick Reynolds, John M Maris
Neuroblastoma cell lines are an important and cost-effective model used to study oncogenic drivers of the disease. While many of these cell lines have been previously characterized with SNP, methylation, and/or mRNA expression microarrays, there has not been an effort to comprehensively sequence these cell lines. Here, we present raw whole transcriptome data generated by RNA sequencing of 39 commonly-used neuroblastoma cell lines. These data can be used to perform differential expression analysis based on a genetic aberration or phenotype in neuroblastoma (e...
March 28, 2017: Scientific Data
https://www.readbyqxmd.com/read/28350011/characterisation-of-male-breast-cancer-a-descriptive-biomarker-study-from-a-large-patient-series
#6
Matthew P Humphries, Sreekumar Sundara Rajan, Hedieh Honarpisheh, Gabor Cserni, Jo Dent, Laura Fulford, Lee B Jordan, J Louise Jones, Rani Kanthan, Maria Litwiniuk, Anna Di Benedetto, Marcella Mottolese, Elena Provenzano, Sami Shousha, Mark Stephens, Janina Kulka, Ian O Ellis, Akinwale N Titloye, Andrew M Hanby, Abeer M Shaaban, Valerie Speirs
Male breast cancer (MBC) is rare. We assembled 446 MBCs on tissue microarrays and assessed clinicopathological information, together with data from 15 published studies, totalling 1984 cases. By immunohistochemistry we investigated 14 biomarkers (ERα, ERβ1, ERβ2, ERβ5, PR, AR, Bcl-2, HER2, p53, E-cadherin, Ki67, survivin, prolactin, FOXA1) for survival impact. The main histological subtype in our cohort and combined analyses was ductal (81%, 83%), grade 2; (40%, 44%), respectively. Cases were predominantly ERα (84%, 82%) and PR positive (74%, 71%), respectively, with HER2 expression being infrequent (2%, 10%), respectively...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28323933/research-resource-transcriptional-dynamics-of-cultured-human-villous-cytotrophoblasts
#7
Joshua F Robinson, Mirhan Kapidzic, Matthew Gormley, Katherine Ona, Terrence Dent, Helia Seifikar, Emily G Hamilton, Susan J Fisher
During human pregnancy, cytotrophoblasts (CTBs) play key roles in uterine invasion, vascular remodeling, and anchoring of the feto-placental unit. Due to the challenges associated with studying human placentation in utero, cultured primary villous CTBs are used as a model of the differentiation pathway that leads to invasion of the uterine wall. In vitro, CTBs emulate in vivo cell behaviors, such as migration, aggregation and substrate penetration. While some of the molecular features related to these cell behaviors have been described, the underlying mechanisms, at a global level, remain undefined at mid-gestation...
March 8, 2017: Endocrinology
https://www.readbyqxmd.com/read/28318045/diagnosis-of-gastro-oesophageal-reflux-disease-is-enhanced-by-adding-oesophageal-histology-and-excluding-epigastric-pain
#8
N Vakil, M Vieth, B Wernersson, J Wissmar, J Dent
BACKGROUND: The diagnosis of gastro-oesophageal reflux disease (GERD) in clinical practice is limited by the sensitivity and specificity of symptoms and diagnostic testing. AIM: To determine if adding histology as a criterion and excluding patients with epigastric pain enhances the diagnosis for GERD. METHODS: Patients with frequent upper gastrointestinal symptoms who had not taken a proton pump inhibitor in the previous 2 months and who had evaluable distal oesophageal biopsies were included (Diamond study: NCT00291746)...
May 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28314577/nanotubes-the-fast-track-to-treatment-of-dent-disease
#9
Thomas E Willnow
Studies in mice have suggested bone marrow transplantation as a strategy to correct the endocytic dysfunction of the proximal tubules in renal Fanconi syndrome, yet the mode of action has remained mysterious. Using a mouse model of Dent disease, Gabriel et al. now show that rescue of the resorptive capacity in the diseased kidney involves cell-to-cell contact between engrafted and host cells via nanotubes, cellular projections that enable transfer of wild-type activity into mutant cells of the proximal tubule...
April 2017: Kidney International
https://www.readbyqxmd.com/read/28302290/statin-intolerance-and-risk-of-coronary-heart-events-and-all-cause-mortality-following-myocardial-infarction
#10
Maria-Corina Serban, Lisandro D Colantonio, Angelika D Manthripragada, Keri L Monda, Vera A Bittner, Maciej Banach, Ligong Chen, Lei Huang, Ricardo Dent, Shia T Kent, Paul Muntner, Robert S Rosenson
BACKGROUND: Many patients report adverse reactions to, and may not tolerate, statin therapy. These patients may be at increased risk for coronary heart disease (CHD) events and mortality. OBJECTIVES: This study evaluated the risk for recurrent myocardial infarction (MI), CHD events, and all-cause mortality in Medicare beneficiaries with statin intolerance and in those with high adherence to statin therapy. METHODS: We studied 105,329 Medicare beneficiaries who began a moderate- or high-intensity statin dosage after hospitalization for MI between 2007 and 2013...
March 21, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28256525/magnetic-nanoparticles-a-strategy-to-target-the-choroidal-layer-in-the-posterior-segment-of-the-eye
#11
Martina Giannaccini, Lucia Pedicini, Guglielma De Matienzo, Federica Chiellini, Luciana Dente, Vittoria Raffa
Despite the higher rate of blindness due to population aging, minimally invasive and selective drug delivery to the eye still remains an open challenge, especially in the posterior segment. The retina, the retinal pigment epithelium (RPE) and the choroid are posterior segment cell layers, which may be affected by several diseases. In particular, damages to the choroid are associated with poor prognosis in the most severe pathologies. A drug delivery approach, able to target the choroid, is still missing. Recently, we demonstrated that intravitreally injected magnetic nanoparticles (MNP) are able to rapidly and persistently localise within the RPE in an autonomous manner...
March 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28250051/systemic-autoimmunity-induced-by-the-tlr7-8-agonist-resiquimod-causes-myocarditis-and-dilated-cardiomyopathy-in-a-new-mouse-model-of-autoimmune-heart-disease
#12
Muneer G Hasham, Nicoleta Baxan, Daniel J Stuckey, Jane Branca, Bryant Perkins, Oliver Dent, Ted Duffy, Tolani S Hameed, Sarah E Stella, Mohammed Bellahcene, Michael D Schneider, Sian E Harding, Nadia Rosenthal, Susanne Sattler
Systemic autoimmune diseases such as systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) show significant heart involvement and cardiovascular morbidity, which can be due to systemically increased levels of inflammation or direct autoreactivity targeting cardiac tissue. Despite high clinical relevance, cardiac damage secondary to systemic autoimmunity lacks inducible rodent models. Here, we characterise immune-mediated cardiac tissue damage in a new model of SLE induced by topical application of the Toll-like receptor 7/8 (TLR7/8) agonist Resiquimod...
March 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28212688/incidence-and-survival-of-end-stage-kidney-disease-due-to-polycystic-kidney-disease-in-australia-and-new-zealand-1963-2014
#13
Mangalee R Fernando, Hannah Dent, Stephen P McDonald, Gopala K Rangan
BACKGROUND: The aim of this study was to determine whether the incidence and survival of patients with end-stage kidney disease (ESKD) due to polycystic kidney disease (PKD) has changed in Australia and New Zealand. METHODS: Data for all PKD patients who developed ESKD and commenced renal replacement therapy (RRT) was assessed using the Australia and New Zealand Dialysis and Transplant Registry from 1963 to 2014. RESULTS: A total 4678 patients with ESKD due to PKD received RRT during the study period...
February 17, 2017: Population Health Metrics
https://www.readbyqxmd.com/read/28203565/tubular-dysfunction-mimicking-dent-s-disease-in-2-infants-born-with-extremely-low-birth-weight
#14
Midori Awazu, Mie Arai, Shoko Ohashi, Hirotaka Takahashi, Takashi Sekine, Kazushige Ikeda
Two preterm infants, with extremely low birth weight born at gestational weeks 24 and 25, showed generalized proximal tubular dysfunction during their stay in the neonatal intensive care unit, including glucosuria, low molecular weight proteinuria, phosphaturia, uricosuria, enzymuria (elevated urine N-acetyl-β-D-glucosaminidase), panaminoaciduria, and hypercalciuria, associated with renal calcification. Renal tubular acidosis was not present in either patient. DNA mutation analysis for Dent's disease, performed in patient 1, was negative...
January 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28154153/diencephalic-size-is-restricted-by-a-novel-interplay-between-gcn5-acetyltransferase-activity-and-retinoic-acid-signaling
#15
Jonathan J Wilde, Julie A Siegenthaler, Sharon Y R Dent, Lee A Niswander
Diencephalic defects underlie an array of neurological diseases. Previous studies have suggested that retinoic acid (RA) signaling is involved in diencephalic development at late stages of embryonic development, but its roles and mechanisms of action during early neural development are still unclear. Here we demonstrate that mice lacking enzymatic activity of the acetyltransferase GCN5 ((Gcn5(hat/hat) )), which were previously characterized with respect to their exencephalic phenotype, exhibit significant diencephalic expansion, decreased diencephalic RA signaling, and increased diencephalic WNT and SHH signaling...
March 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28143656/bone-marrow-transplantation-improves-proximal-tubule-dysfunction-in-a-mouse-model-of-dent-disease
#16
Sarah S Gabriel, Hendrica Belge, Alkaly Gassama, Huguette Debaix, Alessandro Luciani, Thomas Fehr, Olivier Devuyst
Dent disease is a rare X-linked tubulopathy caused by mutations in the endosomal chloride-proton exchanger (ClC-5) resulting in defective receptor-mediated endocytosis and severe proximal tubule dysfunction. Bone marrow transplantation has recently been shown to preserve kidney function in cystinosis, a lysosomal storage disease causing proximal tubule dysfunction. Here we test the effects of bone marrow transplantation in Clcn5(Y/-) mice, a faithful model for Dent disease. Transplantation of wild-type bone marrow in Clcn5(Y/-) mice significantly improved proximal tubule dysfunction, with decreased low-molecular-weight proteinuria, glycosuria, calciuria, and polyuria four months after transplantation, compared to Clcn5(Y/-) mice transplanted with ClC-5 knockout bone marrow...
January 28, 2017: Kidney International
https://www.readbyqxmd.com/read/28127173/crouzon-s-syndrome-a-rare-genetic-disorder
#17
Anupriya Kaushik, Hindpal Bhatia, Naresh Sharma
Crouzon's syndrome, also known as brachial arch syndrome, is an autosomal dominant disorder with complete penetrance and variable expressivity. Described by a French neurosurgeon in 1912, it is a rare genetic disorder. Crouzon's syndrome is caused by mutation in the fibroblast growth factor receptor 2 (FGFR2) gene. Normally, the sutures in the human skull fuse after the complete growth of the brain, but if any of these sutures close early, then it may interfere with the growth of the brain. The disease is characterized by craniosynostosis, with associated dentofacial anomalies...
October 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28127170/dental-caries-status-of-institutionalized-orphan-children-from-jammu-and-kashmir-india
#18
Aasim F Shah, Pradeep Tangade, T L Ravishankar, Amit Tirth, Sumit Pal, Manu Batra
INTRODUCTION: It has been well documented that the absence of family support influences the general and oral health of the children. Factors that lead to the development of disease at a given point in time are likely to have their roots in a complex chain of environmental events that may have begun years before. A number of studies have examined the relationship between dental caries and material deprivation and found a positive association between them. Though orphans contribute to 2% of world's population, literature regarding their oral health status is very scarce...
October 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28124099/evidence-based-goals-in-ldl-c-reduction
#19
REVIEW
Handrean Soran, Ricardo Dent, Paul Durrington
The evidence from trials of statin therapy suggests that benefits in cardiovascular disease (CVD) event reduction are proportional to the magnitude of low-density lipoprotein cholesterol (LDL-C) lowering. The lack of a threshold at which LDL-C lowering is not beneficial, in terms of CVD prevention observed in these trials, is supported by epidemiological and genetic studies reporting the cardio-protective effects of lifelong low exposure to atherogenic cholesterol in a graded fashion. Providing that intensive LDL-C lowering is safe, these observations suggest that many individuals even at current LDL-C treatment targets could benefit...
April 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28101447/functional-coupling-of-v-atpase-and-clc-5
#20
REVIEW
Nobuhiko Satoh, Masashi Suzuki, Motonobu Nakamura, Atsushi Suzuki, Shoko Horita, George Seki, Kyoji Moriya
Dent's disease is an X-linked renal tubulopathy characterized by low molecular weight proteinuria, hypercalciuria and progressive renal failure. Disease aetiology is associated with mutations in the CLCN5 gene coding for the electrogenic 2Cl(-)/H(+) antiporter chloride channel 5 (CLC-5), which is expressed in the apical endosomes of renal proximal tubules with the vacuolar type H(+)-ATPase (V-ATPase). Initially identified as a member of the CLC family of Cl(-) channels, CLC-5 was presumed to provide Cl(-) shunt into the endosomal lumen to dissipate H(+) accumulation by V-ATPase, thereby facilitating efficient endosomal acidification...
January 6, 2017: World Journal of Nephrology
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