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https://www.readbyqxmd.com/read/27923196/environmental-preconditioning-rejuvenates-adult-stem-cells-proliferation-and-chondrogenic-potential
#1
REVIEW
Ming Pei
Adult stem cells are a promising cell source for cartilage regeneration. Unfortunately, due to donor age and ex vivo expansion, stem cell senescence becomes a huge hurdle for these cells to be used clinically. Increasing evidence indicates that environmental preconditioning is a powerful approach in promoting stem cells' ability to resist a harsh environment post-engraftment, such as hypoxia and inflammation. However, few reports organize and evaluate the literature regarding the rejuvenation effect of environmental preconditioning on stem cell proliferation and chondrogenic differentiation capacity, which are important variables for stem cell based tissue regeneration...
November 25, 2016: Biomaterials
https://www.readbyqxmd.com/read/27923169/primary-stability-of-unicompartmental-knee-arthroplasty-under-dynamic-flexion-movement-in-human-femora
#2
Thomas M Grupp, Melanie Holderied, Matthias F Pietschmann, Christian Schröder, Angélica P Islas Padilla, Christoph Schilling, Volkmar Jansson, Peter E Müller
BACKGROUND: The objective of our study was to evaluate the impact of a trabecular stem fixation versus a cortical teeth fixation technique on the primary stability of cemented unicompartmental femoral components under dynamic flexion movement loading conditions in human femora. METHODS: Ten fresh-frozen human knees of a mean donor age of 73.9years were used to perform medial unicompartmental knee arthroplasty under a less invasive parapatellar surgical approach...
November 26, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27922966/local-coverage-for-acute-severely-herniated-brain-using-scalp-and-forehead-flaps-in-a-pediatric-patient-with-head-trauma
#3
Matthew Brown, Navid Pourtaheri, Kristopher Katira, Sunil Manjila, Ali S Totonchi
A 4-year-old-boy required emergent craniectomy and drainage of a large right-sided acute subdural hematoma after head trauma, during which massive sinus hemorrhage with brain swelling occurred. Acute intraoperative management entailed dural cover using synthetic dural membrane substitute and scalp coverage over the herniated brain using acellular dermal matrix. After intensive monitoring and control of raised intracranial pressure over the next few days, the exposed brain was then covered by scalp and forehead flaps with cadaveric skin grafting to the donor site...
December 5, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27922726/bichromophoric-compounds-with-orthogonally-and-parallelly-arranged-chromophores-separated-by-rigid-spacers
#4
Dirk N H Meineke, Mariano L Bossi, Haisen Ta, Vladimir N Belov, Stefan W Hell
Electronic energy transfer (EET) between chromophores is of fundamental importance for many biological processes and optoelectronic devices. However, common models fall short in fully describing the process, especially in bichromophoric model systems with a donor and acceptor connected by a rigid linker providing perpendicular geometries. Herein, we report a novel strategy to prepare bichromophores containing adamantane or 2-(2-adamantylidene)-adamantane as rigid spacers, providing a fixed distance between chromophores, and their parallel or perpendicular arrangement without chromophore rotation...
December 6, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27922664/expression-of-bcl-2-and-micrornas-in-cardiac-tissues-of-patients-with-dilated-cardiomyopathy
#5
Yong Wang, Min Li, Li Xu, Ju Liu, Dong Wang, Quan Li, Lili Wang, Peijie Li, Shanliang Chen, Tianqi Liu
Dilated cardiomyopathy (DCM) is associated with sudden cardiac death and heart failure, resulting in a significant medical burden. The mechanisms underlying the pathogenesis of DCM remain elusive. In the present study, human cardiac tissues from patients with DCM and healthy donors were collected and their pathology was examined. The expression levels of apoptosis regulator Bcl-2 and fibrosis-associated microRNAs were also evaluated. Extensive myocardial fibrosis and apoptosis in DCM cardiac tissues was observed...
December 2, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27922202/current-practices-for-screening-consent-and-care-of-related-donors-in-france-haematopoietic-stem-cell-transplantation-coordinator-nurses-perceptions
#6
A Polomeni, C Bompoint, A Gomez, E Brissot, A Ruggeri, R Belhocine, M Mohty
Haematopoietic stem cell transplantation-coordinating nurses (HSCT-CNs) play an important role in informing related donors (RDs) and in organising human leucocyte antigen (HLA) tests, pre-donation workup and stem cells collection. Our pilot study aimed to explore French HSCT-CNs' perceptions of RD care issues. Twenty-nine French HSCT adult units were sent a questionnaire on the subject of donation procedures, HSCT-CNs' data and their professional experience of related donation issues. Twenty-two HSCT-CNs returned a completed questionnaire, and 90% of HSCT units were involved to some degree in both patient and donor care...
December 6, 2016: European Journal of Cancer Care
https://www.readbyqxmd.com/read/27922067/immune-activation-influences-samhd1-expression-and-vpx-mediated-samhd1-degradation-during-chronic-hiv-1-infection
#7
Weihui Fu, Chao Qiu, Mingzhe Zhou, Lingyan Zhu, Yu Yang, Chenli Qiu, Linxia Zhang, Xuan Xu, Ying Wang, Jianqing Xu, Xiaoyan Zhang
SAMHD1 restricts human immunodeficiency virus type 1 (HIV-1) replication in myeloid cells and CD4(+) T cells, while Vpx can mediate SAMHD1 degradation to promote HIV-1 replication. Although the restriction mechanisms of SAMHD1 have been well-described, SAMHD1 expression and Vpx-mediated SAMHD1 degradation during chronic HIV-1 infection were poorly understood. Flow cytometric analysis was used to directly visualize ex vivo, and after in vitro SIV-Vpx treatment, SAMHD1 expression in CD4(+) T cells and monocytes...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922011/detecting-stoichiometry-of-macromolecular-complexes-in-live-cells-using-fret
#8
Manu Ben-Johny, Daniel N Yue, David T Yue
The stoichiometry of macromolecular interactions is fundamental to cellular signalling yet challenging to detect from living cells. Fluorescence resonance energy transfer (FRET) is a powerful phenomenon for characterizing close-range interactions whereby a donor fluorophore transfers energy to a closely juxtaposed acceptor. Recognizing that FRET measured from the acceptor's perspective reports a related but distinct quantity versus the donor, we utilize the ratiometric comparison of the two to obtain the stoichiometry of a complex...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27921397/nitric-oxide-induced-by-polyamines-involves-antioxidant-systems-against-chilling-stress-in-tomato-lycopersicon-esculentum-mill-seedling
#9
Qian-Nan Diao, Yong-Jun Song, Dong-Mei Shi, Hong-Yan Qi
Polyamines (PAs) and nitric oxide (NO) are vital signals in modulating plant response to abiotic stress. However, to our knowledge, studies on the relationship between NO and PAs in response to cold stress in tomato are limited. Accordingly, in this study, we investigated the effects of putrescine (Put) and spermidine (Spd) on NO generation and the function of Spd-induced NO in the tolerance of tomato seedling under chilling stress. Spd increased NO release via the nitric oxide synthase (NOS)-like and nitrate reductase (NR) enzymatic pathways in the seedlings, whereas Put had no such effect...
2016: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/27921366/masked-trichothecene-and-zearalenone-mycotoxins-withstand-digestion-and-absorption-in-the-upper-gi-tract-but-are-efficiently-hydrolyzed-by-human-gut-microbiota-in-vitro
#10
Silvia W Gratz, Reshma Dinesh, Tomoya Yoshinari, Grietje Holtrop, Anthony J Richardson, Gary Duncan, Susan MacDonald, Antony Lloyd, Jonathan Tarbin
SCOPE: Cereal grains are commonly contaminated with Fusarium mycotoxins and their plant-derived masked metabolites. The fate of masked mycotoxins in the human gut is poorly understood. Here we assess the metabolism and transport of glucoside metabolites of common trichothecenes (deoxynivalenol, nivalenol, T-2 toxin) and zearalenone compounds (zearalenone, α- and β-zearalenol) in the human gut in vitro. METHODS AND RESULTS: Masked mycotoxins were incubated with artificial digestive juices and absorption was assessed in differentiated Caco-2/TC7 cells...
December 6, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/27921117/mcp1-triggers-monocyte-dysfunctions-during-abnormal-osteogenic-differentiation-of-mesenchymal-stem-cells-in-ankylosing-spondylitis
#11
Zhongyu Xie, Peng Wang, Jinteng Li, Yuxi Li, Shan Wang, Xiaohua Wu, Suhe Sun, Shuizhong Cen, Hongjun Su, Wen Deng, Zhenhua Liu, Yi Ouyang, Yanfeng Wu, Huiyong Shen
: Ankylosing spondylitis (AS) is a chronic inflammatory disease characterized by pathological osteogenesis and inflammation. However, the pathogenesis of AS and the pathological relationship between osteogenesis and inflammation in this disease remain largely unknown. Mesenchymal stem cells (MSCs) are multipotent progenitor cells capable of osteogenic differentiation and immunoregulation. Recently, we demonstrated that MSCs from AS patients (ASMSCs) have a greater potential for osteogenic differentiation than MSCs from healthy donors (HDMSCs), which therefore seems to be a component of pathological osteogenesis in AS...
December 5, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27920920/crystal-structure-of-bis-trans-di-chlorido-bis-propane-1-3-di-amine-%C3%AE%C2%BA-2-n-n-chromium-iii-dichromate-from-synchrotron-data
#12
Dohyun Moon, Keon Sang Ryoo, Jong-Ha Choi
The structure of the title compound, [CrCl2(tn)2]2[Cr2O7] (tn = propane-1,3-di-amine; C3H10N2), has been determined from synchrotron data. The asymmetric unit contains one Cr(III) complex cation and half a [Cr2O7](2-) anion. In the complex cation, the Cr(III) ion is coordinated by the four N atoms of two propane-1,3-di-amine (tn) ligands in the equatorial plane and by two Cl atoms in a trans configuration, displaying a distorted octa-hedral coordination sphere. The two six-membered rings in the complex cation have an anti chair-chair conformation with respect to each other...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27920905/an-unprecedented-binuclear-cadmium-di-thio-carbamate-adduct-bis-%C3%AE-2-n-2-hydroxy-eth-yl-n-iso-propyl-carbamodi-thio-ato-%C3%AE%C2%BA-3-s-s-s-bis-n-2-hydroxy-eth-yl-n-iso-propyl-carbamodi-thio-ato-%C3%AE%C2%BA-2-s-s-3-1e-e-2-pyridin-3-yl-methyl-idene-hydrazin-1-yl-idene-meth-yl
#13
Hadi D Arman, Pavel Poplaukhin, Edward R T Tiekink
The asymmetric unit in the title binuclear compound, [Cd(C6H12NOS2)2(C12H10N4)]2·2H2O, comprises a Cd(II) atom, two di-thio-carbamate (dtc) anions, a monodentate 3-pyridine-aldazine ligand and a lattice water mol-ecule. The binuclear mol-ecule is constructed by the application of inversion symmetry. One dtc ligand simultaneously chelates one cadmium atom and bridges the centrosymmetric mate, while the other dtc ligand is chelating only. This leads to a centrosymmetric [Cd(dtc)2]2 core to which are appended two 3-pyridine-aldazine ligands...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27920796/neutrophil-gelatinase-associated-lipocalin-fibroblast-growth-factor-23-and-soluble-klotho-in-long-term-kidney-donors
#14
Inga Strand Thorsen, Inger Hjørdis Bleskestad, Grete Jonsson, Øyvind Skadberg, Lasse Gunnar Gøransson
BACKGROUND: The best treatment for end-stage renal disease (ESRD) is kidney transplantation. Twenty-seven percent of transplantations in Norway are from living donors. Recent studies have shown an increased risk of ESRD and increased mortality in donors. The aim of this study was to determine if the levels of the new biomarkers neutrophil gelatinase-associated lipocalin (NGAL), soluble Klotho (sKlotho), and fibroblast growth factor 23 (FGF23) are changed in kidney donors with normal kidney function defined as an estimated glomerular filtration rate (eGFR) >60 ml/min/1...
September 2016: Nephron Extra
https://www.readbyqxmd.com/read/27920546/chronotherapy-with-low-dose-modified-release-prednisone-for-the-management-of-rheumatoid-arthritis-a-review
#15
REVIEW
Stefano Paolo Beltrametti, Aurora Ianniello, Clara Ricci
To date, rheumatoid arthritis (RA) remains a debilitating, life-threatening disease. One major concern is morning symptoms (MS), as they considerably impair the patients' quality of life and ability to work. MS change in a circadian fashion, resembling the fluctuations of inflammatory cytokines such as interleukin-6, whose levels are higher in RA patients compared to healthy donors. Conversely, serum levels of the potent anti-inflammatory glucocorticoid cortisol are similar to that of healthy subjects, suggesting an imbalance that sustains a pro-inflammatory state...
2016: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/27920090/islet-derived-cd4-t-cells-targeting-proinsulin-in-human-autoimmune-diabetes
#16
Aaron W Michels, Laurie G Landry, Kristen A McDaniel, Liping Yu, Martha Campbell-Thompson, William W Kwok, Kenneth L Jones, Peter A Gottlieb, John W Kappler, Qizhi Tang, Bart O Roep, Mark A Atkinson, Clayton E Mathews, Maki Nakayama
Type 1 diabetes results from chronic autoimmune destruction of insulin-producing beta cells within pancreatic islets. While insulin is a critical self-antigen in animal models of autoimmune diabetes, due to extremely limited access to pancreas samples, little is known about human antigenic targets for islet-infiltrating T-cells. Here we show that proinsulin peptides are targeted by islet-infiltrating T-cells from type 1 diabetes patients. We identified hundreds of T-cells from inflamed pancreatic islets of three young type 1 diabetes organ donors with a short disease duration with high risk HLA genes using a direct T-cell receptor (TCR) sequencing approach without long-term cell culture...
December 5, 2016: Diabetes
https://www.readbyqxmd.com/read/27919903/high-throughput-screening-and-prediction-models-building-for-novel-hemozoin-inhibitors-using-physicochemical-properties
#17
Nguyen Tien Huy, Pham Lan Chi, Jun Nagai, Tran Ngoc Dang, Evaristus Chibunna Mbanefo, Ali Mahmoud Ahmed, Nguyen Phuoc Long, Le Thi Bich Thoa, Le Phi Hung, Titouna Afaf, Kaeko Kamei, Hiroshi Ueda, Kenji Hirayama
It is essential to continue the search for novel antimalarial drugs due to current spread of resistance against artemisinin by Plasmodium falciparum parasites. In this study, we developed in silico models to predict hemozoin inhibitors as a potential first-step screening for novel antimalarials. The in vitro colorimetric high throughput screening assay of hemozoin formation was used to identify hemozoin inhibitors from 9600 structurally diverse compounds. Physicochemical properties of positive hits and randomly selected compounds were extracted from ChemSpider database; they were used for developing prediction models to predict hemozoin inhibitors using two different approaches, i...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27919896/cephalosporin-3-diazeniumdiolate-no-donor-prodrug-pyrro-c3d-enhances-azithromycin-susceptibility-of-non-typeable-haemophilus-influenzae-biofilms
#18
Samuel A Collins, Michael J Kelso, Ardeshir Rineh, Nageshwar R Yepuri, Janice Coles, Claire L Jackson, Georgia D Halladay, Woolf T Walker, Jeremy S Webb, Luanne Hall-Stoodley, Gary J Connett, Martin Feelisch, Saul N Faust, Jane S A Lucas, Raymond N Allan
OBJECTIVES: PYRRO-C3D is a cephalosporin-3-diazeniumdiolate nitric oxide (NO)-donor prodrug designed to selectively deliver NO to bacterial infection sites. The objective of this study was to assess the activity of PYRRO-C3D against non-typeable Haemophilus influenzae (NTHi) biofilms and examine the role of NO in reducing biofilm-associated antibiotic tolerance. METHODS: The activity of PYRRO-C3D on in vitro NTHi biofilms was assessed through CFU enumeration and confocal microscopy...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27919847/using-on-site-liver-3-d-reconstruction-and-volumetric-calculations-in-split-liver-transplantation
#19
Trevor W Reichman, Brittany Fiorello, Ian Carmody, Humberto Bohorquez, Ari Cohen, John Seal, David Bruce, George E Loss
BACKGROUND: Split liver transplantation increases the number of grafts available for transplantation. Pre-recovery assessment of liver graft volume is essential for selecting suitable recipients. The purpose of this study was to determine the ability and feasibility of constructing a 3-D model to aid in surgical planning and to predict graft weight prior to an in situ division of the donor liver. METHODS: Over 11 months, 3-D volumetric reconstruction of 4 deceased donors was performed using Pathfinder Scout© liver volumetric software...
December 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/27919819/patterns-of-constitutively-phosphorylated-kinases-in-b-cells-are-associated-with-disease-severity-in-common-variable-immunodeficiency
#20
Eli Taraldsrud, Pål Aukrust, Silje Jørgensen, Ole Christian Lingjærde, Johanna Olweus, June H Myklebust, Børre Fevang
Patients with common variable immunodeficiency (CVID) constitute a clinically and immunologically heterogeneous group characterized by B-cell dysfunction with hypogammaglobulinemia and defective immunoglobulin class switch of unknown etiology. Current classification systems are insufficient to achieve precise disease management. Characterization of signaling pathways essential for B-cell differentiation and class switch could provide new means to stratify patients. We evaluated constitutive and induced signaling by phospho-specific flow cytometry in 26 CVID patients and 18 healthy blood donors...
December 2, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
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