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https://www.readbyqxmd.com/read/28088078/genetically-tailored-magnetosomes-used-as-mri-probe-for-molecular-imaging-of-brain-tumor
#1
M Boucher, F Geffroy, S Prévéral, L Bellanger, E Selingue, G Adryanczyk-Perrier, M Péan, C T Lefèvre, D Pignol, N Ginet, S Mériaux
We investigate here the potential of single step production of genetically engineered magnetosomes, bacterial biogenic iron-oxide nanoparticles embedded in a lipid vesicle, as a new tailorable magnetic resonance molecular imaging probe. We demonstrate in vitro the specific binding and the significant internalization into U87 cells of magnetosomes decorated with RGD peptide. After injection at the tail vein of glioblastoma-bearing mice, we evidence in the first 2 h the rapid accumulation of both unlabeled and functionalized magnetosomes inside the tumor by Enhanced Permeability and Retention effects...
December 19, 2016: Biomaterials
https://www.readbyqxmd.com/read/28087953/tenofovir-induced-nephrotoxicity-a-retrospective-cohort-study
#2
H M Koh, K Suresh
BACKGROUND: Tenofovir (TDF) has been associated with renal function deterioration, but local data regarding the incidence and risk factors for this adverse event were lacking. OBJECTIVES: To determine the incidence of nephrotoxicity in HIV-infected patients on tenofovir-based regimens and to evaluate risk factors involved in tenofovir-associated renal function decline. METHODS: This is a single-centre retrospective cohort study of 440 HIV-infected adults who were started on tenofovirbased antiretroviral regimens...
December 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28087841/single-cell-transcriptome-analysis-of-fish-immune-cells-provides-insight-into-the-evolution-of-vertebrate-immune-cell-types
#3
Santiago J Carmona, Sarah A Teichmann, Lauren Ferreira, Iain C Macaulay, Michael J T Stubbington, Ana Cvejic, David Gfeller
The immune system of vertebrate species consists of many different cell types that have distinct functional roles and are subject to different evolutionary pressures. Here, we first analysed conservation of genes specific for all major immune cell types in human and mouse. Our results revealed higher gene turnover and faster evolution of trans-membrane proteins in NK cells compared to other immune cell types, and especially T cells, but similar conservation of nuclear and cytoplasmic protein coding genes. To validate these findings in a distant vertebrate species, we used single-cell RNA-Sequencing of lck:GFP cells in zebrafish and obtained the first transcriptome of specific immune cell types in a non-mammalian species...
January 13, 2017: Genome Research
https://www.readbyqxmd.com/read/28087757/alternative-transcription-of-sodium-bicarbonate-transporter-slc4a7-gene-enhanced-by-single-nucleotide-polymorphisms
#4
Hae Jeong Park, Soojung Lee, Eunji Ju, Jayre A Jones, Inyeong Choi
Genome-wide association studies have identified the single nucleotide polymorphism (SNP) rs3278 in the human SLC4A7 gene as one of the marker loci for addiction vulnerability. This marker is located in an intron of the gene, and its genomic role has been unknown. In this study, we examined rs3278 and three adjacent SNPs prevalent in alcoholics for their effects on an alternative promoter that would lead to the production of the N-terminally truncated protein NBCn1ΔN450, missing the first 450 amino acids. Analysis of the transcription start site database and a promoter prediction algorithm identified a cluster of three promoters in intron 7 and two short CpG-rich sites in intron 6...
January 13, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28087700/two-small-molecules-restore-stability-to-a-sub-population-of-the-cystic-fibrosis-transmembrane-conductance-regulator-with-the-predominant-disease-causing-mutation
#5
Xin Meng, Yiting Wang, Xiaomeng Wang, Joe A Wrennall, Tracy L Rimington, Hongyu Li, Zhiwei Cai, Robert C Ford, David N Sheppard
Cystic fibrosis (CF) is caused by mutations that disrupt the plasma membrane expression, stability, and function of the cystic fibrosis transmembrane conductance regulator (CFTR) Cl- channel. Two small molecules, the CFTR corrector lumacaftor and the potentiator ivacaftor, are now used clinically to treat CF, although some studies suggest that they have counteracting effects on CFTR stability. Here, we investigated the impact of these compounds on the instability of F508del-CFTR, the most common CF mutation...
January 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28087651/frontline-science-multiple-cathepsins-promote-inflammasome-independent-particle-induced-cell-death-during-nlrp3-dependent-il-1%C3%AE-activation
#6
Gregory M Orlowski, Shruti Sharma, Jeff D Colbert, Matthew Bogyo, Stephanie A Robertson, Hiroshi Kataoka, Francis K Chan, Kenneth L Rock
Sterile particles cause several chronic, inflammatory diseases, characterized by repeating cycles of particle phagocytosis and inflammatory cell death. Recent studies have proposed that these processes are driven by the NLRP3 inflammasome, a platform activated by phagocytosed particles, which controls both caspase-1-dependent cell death (pyroptosis) and mature IL-1β secretion. After phagocytosis, particles can disrupt lysosomes, and inhibitor studies have suggested that the resulting release of a lysosomal protease-cathepsin B-into the cytosol somehow activates NLRP3...
January 13, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28087486/enhanced-articular-cartilage-by-human-mesenchymal-stem-cells-in-enzymatically-mediated-transiently-rgds-functionalized-collagen-mimetic-hydrogels
#7
Paresh A Parmar, Jean-Philippe St-Pierre, Lesley W Chow, Christopher D Spicer, Violet Stoichevska, Yong Y Peng, Jerome A Werkmeister, John A M Ramshaw, Molly M Stevens
: Recapitulation of the articular cartilage microenvironment for regenerative medicine applications faces significant challenges due to the complex and dynamic biochemical and biomechanical nature of native tissue. Towards the goal of biomaterial designs that enable the temporal presentation of bioactive sequences, recombinant bacterial collagens such as Streptococcal collagen-like 2 (Scl2) proteins can be employed to incorporate multiple specific bioactive and biodegradable peptide motifs into a single construct...
January 10, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28087457/t-cell-replete-peripheral-blood-haploidentical-hematopoietic-cell-transplantation-with-post-transplant-cyclophosphamide-results-in-outcomes-similar-to-traditionally-matched-donors-in-active-disease-acute-myeloid-leukemia
#8
Joan How, Michael Slade, Khoan Vu, John F DiPersio, Peter Westervelt, Geoffrey L Uy, Camille N Abboud, Ravi Vij, Mark A Schroeder, Todd A Fehniger, Rizwan Romee
Outcomes for acute myeloid leukemia (AML) patients who fail to achieve complete remission remain poor. Hematopoietic cell transplantation (HCT) has been shown to induce long-term survival in AML patients with active disease. HCT is largely performed with HLA-matched unrelated or HLA-matched related donors. Recently, HCT with HLA-haploidentical related donors has been identified as a feasible option when HLA-matched donors are not immediately available. However, there is little data comparing outcomes of AML patients with active disease who receive haploidentical versus traditionally matched HCT...
January 10, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28087430/ryanodine-receptor-1-polymorphism-is-not-associated-with-aneurysmal-subarachnoid-hemorrhage-or-its-clinical-sequelae
#9
Philipp Hendrix, Paul M Foreman, Mark R Harrigan, Winfield S Fisher, Nilesh A Vyas, Robert H Lipsky, Minkuan Lin, Beverly C Walters, R Shane Tubbs, Mohammadali M Shoja, Jean-Francois Pittet, Mali Mathru, Christoph J Griessenauer
OBJECTIVE: The pathophysiological mechanisms underlying cerebral vasospasm following aneurysmal subarachnoid hemorrhage (aSAH) remain poorly understand. Ryanodine receptors (RYR) are intracellular calcium channels involved in the regulation of vascular smooth muscle cells and cerebrovascular tone and diameter. Previous work reported an association between a RYR polymorphism and cerebral vasospasm. Here, we sought to assess the impact of that RYR polymorphism on aSAH and its clinical sequelae...
January 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28087421/physiology-anaerobes-and-the-origin-of-mitosing-cells-50-years-on
#10
William F Martin
Endosymbiotic theory posits that some organelles or structures of eukaryotic cells stem from free-living prokaryotes that became endosymbionts within a host cell. Endosymbiosis has a long and turbulent history of controversy and debate going back over 100 years. The 1967 paper by Lynn Sagan (later Lynn Margulis) forced a reluctant field to take endosymbiotic theory seriously and to incorporate it into the fabric of evolutionary thinking. Margulis envisaged three cellular partners associating in series at eukaryotic origin: the host (an engulfing bacterium), the mitochondrion (a respiring bacterium), and the flagellum (a spirochaete), with lineages descended from that flagellated eukaryote subsequently acquiring plastids from cyanobacteria, but on multiple different occasions in her 1967 account...
January 10, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28087384/epidermal-growth-factor-egf-fragment-guided-anticancer-theranostic-particles-for-ph-responsive-release-of-doxorubicin
#11
Myun Koo Kang, Wei Mao, Jun Bae Lee, Hyuk Sang Yoo
An EGF fragment and doxorubicin were chemically co-decorated on single magnetic nanoparticles for concomitant cancer targeting and treatment. Magnetic nanoparticles (MNPs) were prepared by the precipitation of ferric chloride hydrates in an ammonia solution and subsequent surface-functionalization with amines. The terminal thiol group of the EGF fragment (EGFfr) was first conjugated to surface amines of the MNPs using a heterofunctional crosslinker, and doxorubicin was sequentially conjugated to the MNPs via a hydrazone linker, where the degree of substation of the surface amines to EGF was varied from 1% to 40%...
January 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28087363/membrane-restructuring-following-in-situ-sialidase-digestion-of-gangliosides-complex-model-bilayers-by-synchrotron-radiation-reflectivity
#12
Valeria Rondelli, Paola Brocca, Giovanna Fragneto, Jean Daillant, Cristina Tringali, Laura Cantu', Elena Del Favero
Synchrotron radiation reflectometry was used to access the transverse structure of model membranes under the action of the human sialidase NEU2, down to the Ångström length scale. Model membranes were designed to mimic the lipid composition of so-called Glycosphingolipids Enriched Microdomains (GEMs), which are membrane platforms specifically enriched in cholesterol and sphingolipids, where also typical signalling molecules are hosted. Gangliosides, glycosphingolipids containing one or more sialic acid residues, are asymmetrically embedded in GEMs, in the outer membrane leaflet...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28087284/pharmacological-and-surgical-therapy-for-the-central-giant-cell-granuloma-a-long-term-retrospective-cohort-study
#13
Willem Hans Schreuder, Henk van den Berg, Anne Marie Westermann, Zachary Scott Peacock, Jan de Lange
PURPOSE: This is a retrospective cohort study of patients with a central giant cell granuloma (CGCG) treated at a single center to assess and compare the different surgical and non-surgical approaches. MATERIAL AND METHODS: A cohort with a single histologically proven non-syndrome-related CGCG was selected and reviewed. Patients were allocated to group I (surgery), group II (pharmacotherapy), and group III (pharmacotherapy and surgery). The primary outcome was long-term radiologic response using computed tomography...
December 9, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28087163/clinical-studies-of-ex-vivo-expansion-to-accelerate-engraftment-after-umbilical-cord-blood-transplantation-a-systematic-review
#14
REVIEW
Jeffrey Kiernan, Pauline Damien, Madeline Monaghan, Risa Shorr, Lauralyn McIntyre, Dean Fergusson, Alan Tinmouth, David Allan
Cell dose limits greater use of umbilical cord blood (UCB) in hematopoietic cell transplantation. The clinical benefits of ex vivo expansion need clarity to understand its potential impact. A systematic search of studies addressing UCB ex vivo expansion was conducted. Fifteen clinical studies (349 transplanted patients) and 13 registered trials were identified. The co-infusion of an expanded unit and a second unmanipulated unit (8 studies), the fractional expansion of 12% to 60% of a single unit (5 studies), and the infusion of a single expanded unit (2 studies) were reported...
December 23, 2016: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28087131/incidence-and-effect-of-variant-histology-on-oncological-outcomes-in-patients-with-bladder-cancer-treated-with-radical-cystectomy
#15
Marco Moschini, Paolo Dell'Oglio, Roberta Luciano', Giorgio Gandaglia, Francesco Soria, Agostino Mattei, Tobias Klatte, Rocco Damiano, Shahrokh F Shariat, Andrea Salonia, Francesco Montorsi, Alberto Briganti, Renzo Colombo, Andrea Gallina
INTRODUCTION: We sought to describe incidence of histological variants after radical cystectomy (RC) due to bladder cancer (BCa). Moreover, we investigated survival outcomes accounting for this parameter. METHODS: We retrospectively evaluated data from 1,067 patients with BCa treated with RC between 1990 and 2013 at a single tertiary care referral center. All specimen were evaluated by dedicated uropathologists. Univariable and multivariable Cox regression analyses tested the effect of different histopathological variant on recurrence, cancer-specific mortality (CSM), and overall mortality (OM) after accounting for all available confounders...
January 10, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28087079/the-stim-orai-coupling-interface-and-gating-of-the-orai1-channel
#16
REVIEW
Yandong Zhou, Xiangyu Cai, Robert M Nwokonko, Natalia A Loktionova, Youjun Wang, Donald L Gill
In virtually all cells, store-operated Ca(2+) entry signals are vital in controlling a spectrum of functions. The signals are mediated by STIM proteins in the ER and Orai channels in the PM which undergo a dynamic coupling process within discrete ER-PM junctional regions. This coupling is initiated by depletion of ER stored Ca(2+) triggering STIM proteins to undergo an intricate activation process. Thereafter, STIM proteins become trapped in the ER-PM junctions where they tether and gate PM Orai Ca(2+) channels...
January 8, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28086908/hiv-integration-sites-in-latently-infected-cell-lines-evidence-of-ongoing-replication
#17
Jori Symons, Abha Chopra, Eva Malantinkova, Ward De Spiegelaere, Shay Leary, Don Cooper, Chike O Abana, Ajantha Rhodes, Simin D Rezaei, Linos Vandekerckhove, Simon Mallal, Sharon R Lewin, Paul U Cameron
BACKGROUND: Assessing the location and frequency of HIV integration sites in latently infected cells can potentially inform our understanding of how HIV persists during combination antiretroviral therapy. We developed a novel high throughput sequencing method to evaluate HIV integration sites in latently infected cell lines to determine whether there was virus replication or clonal expansion in these cell lines observed as multiple integration events at the same position. RESULTS: We modified a previously reported method using random DNA shearing and PCR to allow for high throughput robotic processing to identify the site and frequency of HIV integration in latently infected cell lines...
January 13, 2017: Retrovirology
https://www.readbyqxmd.com/read/28086804/comparative-analysis-of-the-root-transcriptomes-of-cultivated-sweetpotato-ipomoea-batatas-l-lam-and-its-wild-ancestor-ipomoea-trifida-kunth-g-don
#18
Sathish K Ponniah, Jyothi Thimmapuram, Ketaki Bhide, Venu Kal Kalavacharla, Muthusamy Manoharan
BACKGROUND: The complex process of formation of storage roots (SRs) from adventitious roots affects sweetpotato yield. Identifying the genes that are uniquely expressed in the SR forming cultivated species, Ipomoea batatas (Ib), and its immediate ancestral species, Ipomoea trifida (It), which does not form SRs, may provide insights into the molecular mechanisms underlying SR formation in sweetpotato. RESULTS: Illumina paired-end sequencing generated ~208 and ~200 million reads for Ib and It, respectively...
January 13, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28086790/rna-sequencing-for-global-gene-expression-associated-with-muscle-growth-in-a-single-male-modern-broiler-line-compared-to-a-foundational-barred-plymouth-rock-chicken-line
#19
Byung-Whi Kong, Nicholas Hudson, Dongwon Seo, Seok Lee, Bhuwan Khatri, Kentu Lassiter, Devin Cook, Alissa Piekarski, Sami Dridi, Nicholas Anthony, Walter Bottje
BACKGROUND: Modern broiler chickens exhibit very rapid growth and high feed efficiency compared to unselected chicken breeds. The improved production efficiency in modern broiler chickens was achieved by the intensive genetic selection for meat production. This study was designed to investigate the genetic alterations accumulated in modern broiler breeder lines during selective breeding conducted over several decades. METHODS: To identify genes important in determining muscle growth and feed efficiency in broilers, RNA sequencing (RNAseq) was conducted with breast muscle in modern pedigree male (PeM) broilers (n = 6 per group), and with an unselected foundation broiler line (Barred Plymouth Rock; BPR)...
January 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28081260/comparative-genome-sequencing-reveals-within-host-genetic-changes-in-neisseria-meningitidis-during-invasive-disease
#20
Johanna Klughammer, Marcus Dittrich, Jochen Blom, Vera Mitesser, Ulrich Vogel, Matthias Frosch, Alexander Goesmann, Tobias Müller, Christoph Schoen
Some members of the physiological human microbiome occasionally cause life-threatening disease even in immunocompetent individuals. A prime example of such a commensal pathogen is Neisseria meningitidis, which normally resides in the human nasopharynx but is also a leading cause of sepsis and epidemic meningitis. Using N. meningitidis as model organism, we tested the hypothesis that virulence of commensal pathogens is a consequence of within host evolution and selection of invasive variants due to mutations at contingency genes, a mechanism called phase variation...
2017: PloS One
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