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https://www.readbyqxmd.com/read/27909010/apoer2-controls-not-only-neuronal-migration-in-the-intermediate-zone-but-also-termination-of-migration-in-the-developing-cerebral-cortex
#1
Yuki Hirota, Ken-Ichiro Kubo, Takahiro Fujino, Tokuo T Yamamoto, Kazunori Nakajima
Neuronal migration contributes to the establishment of mammalian brain. The extracellular protein Reelin sends signals to various downstream molecules by binding to its receptors, the apolipoprotein E receptor 2 (ApoER2) and very low-density lipoprotein receptor and exerts essential roles in the neuronal migration and formation of the layered neocortex. However, the cellular and molecular functions of Reelin signaling in the cortical development are not yet fully understood. Here, to gain insight into the role of Reelin signaling during cortical development, we examined the migratory behavior of Apoer2-deficient neurons in the developing brain...
November 30, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27907109/loss-of-h3k9me3-correlates-with-atm-activation-and-histone-h2ax-phosphorylation-deficiencies-in-hutchinson-gilford-progeria-syndrome
#2
Haoyue Zhang, Linlin Sun, Kun Wang, Di Wu, Mason Trappio, Celeste Witting, Kan Cao
Compelling evidence suggests that defective DNA damage response (DDR) plays a key role in the premature aging phenotypes in Hutchinson-Gilford progeria syndrome (HGPS). Studies document widespread alterations in histone modifications in HGPS cells, especially, the global loss of histone H3 trimethylated on lysine 9 (H3K9me3). In this study, we explore the potential connection(s) between H3K9me3 loss and the impaired DDR in HGPS. When cells are exposed to a DNA-damaging agent Doxorubicin (Dox), double strand breaks (DSBs) are generated that result in the phosphorylation of histone H2A variant H2AX (gammaH2AX) within an hour...
2016: PloS One
https://www.readbyqxmd.com/read/27906936/analgesic-effect-of-nalbuphine-when-added-to-intravenous-regional-anesthesia-a-randomized-control-trial
#3
Mohamed Hassan Bakri, Eman Ahmed Ismail, Sayed Kaoud Abd-Elshafy
BACKGROUND: Different adjuvant drugs are currently added to lidocaine for intravenous regional anesthesia (IVRA) to decrease tourniquet and postoperative pain. OBJECTIVE: The aim of the study was to examine the effect of nalbuphine when added toIVRA. STUDY DESIGN: Prospective, randomized, double-blind, controlled clinical trial. SETTING: Assiut University Hospitals. METHODS: One hundred-six adult patients scheduled for unilateral hand surgery under IVRA were randomized into 2 equal groups...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27906917/efficacy-and-safety-of-tc-325-hemospraytm-for-non-variceal-upper-gastrointestinal-bleeding-at-middlemore-hospital-the-early-new-zealand-experience
#4
Hannah Giles, Dinesh Lal, Stephen Gerred, Paul Casey, Alasdair Patrick, Derek Luo, Ravinder Ogra
AIMS: A case series to review early experiences with HemosprayTM for a variety of non-variceal upper gastrointestinal bleeding (UGIB) at Middlemore Hospital. METHODS: HemosprayTM was administered therapeutically as first line or rescue at the discretion of the endoscopist. All cases of UGIB requiring HemosprayTM at Middlemore Hospital were identified to the investigator who undertook analysis of electronic and hard copy notes. RESULTS: Between October 2013 and July 2016, 36 patients were treated endoscopically with HemosprayTM...
December 2, 2016: New Zealand Medical Journal
https://www.readbyqxmd.com/read/27906623/orotate-orotic-acid-an-essential-and-versatile-molecule
#5
M Löffler, E A Carrey, E Zameitat
Orotate (OA) is well-known as a precursor in biosynthesis of pyrimidines; in mammals it is released from the mitochondrial dihydroorotate dehydrogenase (DHODH) for conversion to UMP by the cytoplasmic UMP synthase enzyme. OA is also a normal part of the diet, being found in milk and dairy products, and it is converted to uridine for use in the pyrimidine salvage pathway predominantly in liver, kidney and erythrocytes. Early research into nutrition identified orotate as "vitamin B13," and its use as a complex with organic cations or metal ions was promulgated in body-building, and in assisting therapies of metabolic syndromes...
December 2016: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/27906061/laminin-and-matrix-metalloproteinase-11-regulate-fibronectin-levels-in-the-zebrafish-myotendinous-junction
#6
Molly H Jenkins, Sarah S Alrowaished, Michelle F Goody, Bryan D Crawford, Clarissa A Henry
BACKGROUND: Remodeling of the extracellular matrix (ECM) regulates cell adhesion as well as signaling between cells and their microenvironment. Despite the importance of tightly regulated ECM remodeling for normal muscle development and function, mechanisms underlying ECM remodeling in vivo remain elusive. One excellent paradigm in which to study ECM remodeling in vivo is morphogenesis of the myotendinous junction (MTJ) during zebrafish skeletal muscle development. During MTJ development, there are dramatic shifts in the primary components comprising the MTJ matrix...
May 2, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27902776/inhibition-of-candida-albicans-biofilm-formation-by-the-synthetic-lactoferricin-derived-peptide-hlf1-11
#7
Paola Morici, Roberta Fais, Cosmeri Rizzato, Arianna Tavanti, Antonella Lupetti
The aim of this study was to evaluate the in vitro activity of the synthetic peptide hLF1-11 against biofilm produced by clinical isolates of Candida albicans with different fluconazole susceptibility. The antibiofilm activity of the peptide hLF1-11 was assessed in terms of reduction of biofilm cellular density, metabolic activity and sessile cell viability. The extent of morphogenesis in hLF1-11 treated and untreated biofilms was also investigated microscopically. Transcription levels of genes related to cell adhesion, hyphal development and extracellular matrix production were analysed by qRT-PCR in hLF1-11 treated and untreated biofilms...
2016: PloS One
https://www.readbyqxmd.com/read/27899062/scleraxis-is-essential-for-tendon-differentiation-by-equine-embryonic-stem-cells-and-in-equine-fetal-tenocytes
#8
Emma Bavin, Francesca Atkinson, Tom Barsby, Debbie Guest
The transcription factor scleraxis is required for tendon development and is upregulated during embryonic stem cell (ESC) differentiation into tenocytes. However, its role beyond early embryonic development is not defined. We utilised a short hairpin RNA to knockdown scleraxis expression in ESCs, adult and fetal tenocytes. No effect on growth or morphology was observed in 2D cultures. However, scleraxis knockdown in fetal tenocytes significantly reduced COL1A1, COMP and SOX9 gene expression. Scleraxis knockdown in adult tenocytes had no effect on the expression of these genes...
November 29, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27898438/rescue-therapies-for-acute-respiratory-distress-syndrome-what-to-try-first
#9
Onnen Moerer, Tommaso Tonetti, Michael Quintel
PURPOSE OF REVIEW: Severe respiratory failure due to the acute respiratory distress syndrome (ARDS) might require rescue therapy measures beyond even extended standard care to ensure adequate oxygenation and survival. This review provides a summary and assessment of treatment options that can be beneficial when the standard approach fails. RECENT FINDINGS: 'Life-threatening' conditions or refractory hypoxemia during mechanical ventilation are more a matter of personal rating than an objective diagnosis based on defined and/or unanimously agreed thresholds that would mandate the use of rescue therapies...
November 24, 2016: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/27895320/clinical-experience-with-pancreas-graft-rescue-from-severe-thrombus-after-simultaneous-pancreas-kidney-transplantation-by-early-detection-with-doppler-ultrasound-a-case-report
#10
Mitsunobu Takeda, Daisaku Yamada, Hidetoshi Eguchi, Tadafumi Asaoka, Takehiro Noda, Hiroshi Wada, Kunihito Goto, Koichi Kawamoto, Yutaka Takeda, Masahiro Tanemura, Toshinori Ito, Masaki Mori, Yuichiro Doki
BACKGROUND Graft thrombosis is the main cause of early graft loss after transplantation. In Japan, pancreases available for transplantation are frequently from marginal donors due to diverse backgrounds in the population. However, marginal tissues increase the risk of early thrombosis in the graft. CASE REPORT Here, we describe a 41-year-old woman with type 1 diabetes mellitus who underwent a simultaneous pancreas-kidney transplantation. The pancreas was retrieved from a 34-year-old man who had experienced severe hemodynamic instability...
November 29, 2016: American Journal of Case Reports
https://www.readbyqxmd.com/read/27892953/thalamic-mir-338-3p-mediates-auditory-thalamocortical-disruption-and-its-late-onset-in-models-of-22q11-2-microdeletion
#11
Sungkun Chun, Fei Du, Joby J Westmoreland, Seung Baek Han, Yong-Dong Wang, Donnie Eddins, Ildar T Bayazitov, Prakash Devaraju, Jing Yu, Marcia M Mellado Lagarde, Kara Anderson, Stanislav S Zakharenko
Although 22q11.2 deletion syndrome (22q11DS) is associated with early-life behavioral abnormalities, affected individuals are also at high risk for the development of schizophrenia symptoms, including psychosis, later in life. Auditory thalamocortical (TC) projections recently emerged as a neural circuit that is specifically disrupted in mouse models of 22q11DS (hereafter referred to as 22q11DS mice), in which haploinsufficiency of the microRNA (miRNA)-processing-factor-encoding gene Dgcr8 results in the elevation of the dopamine receptor Drd2 in the auditory thalamus, an abnormal sensitivity of thalamocortical projections to antipsychotics, and an abnormal acoustic-startle response...
November 28, 2016: Nature Medicine
https://www.readbyqxmd.com/read/27891552/enteric-glial-cells-are-susceptible-to-clostridium-difficile-toxin-b
#12
Katia Fettucciari, Pamela Ponsini, Davide Gioè, Lara Macchioni, Camilla Palumbo, Elisabetta Antonelli, Stefano Coaccioli, Vincenzo Villanacci, Lanfranco Corazzi, Pierfrancesco Marconi, Gabrio Bassotti
Clostridium difficile causes nosocomial/antibiotic-associated diarrhoea and pseudomembranous colitis. The major virulence factors are toxin A and toxin B (TcdB), which inactivate GTPases by monoglucosylation, leading to cytopathic (cytoskeleton alteration, cell rounding) and cytotoxic effects (cell-cycle arrest, apoptosis). C. difficile toxins breaching the intestinal epithelial barrier can act on underlying cells, enterocytes, colonocytes, and enteric neurons, as described in vitro and in vivo, but until now no data have been available on enteric glial cell (EGC) susceptibility...
November 28, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27890673/functional-validation-of-abhd12-mutations-in-the-neurodegenerative-disease-pharc
#13
Angèle Tingaud-Sequeira, Demetrio Raldúa, Julie Lavie, Guilaine Mathieu, Magali Bordier, Anja Knoll-Gellida, Pierre Rambeau, Isabelle Coupry, Michèle André, Eva Malm, Claes Möller, Sten Andreasson, Nanna D Rendtorff, Lisbeth Tranebjærg, Michel Koenig, Didier Lacombe, Cyril Goizet, Patrick J Babin
ABHD12 mutations have been linked to neurodegenerative PHARC (polyneuropathy, hearing loss, ataxia, retinitis pigmentosa, and early-onset cataract), a rare, progressive, autosomal, recessive disease. Although ABHD12 is suspected to play a role in the lysophosphatidylserine and/or endocannabinoid pathways, its precise functional role(s) leading to PHARC disease had not previously been characterized. Cell and zebrafish models were designed to demonstrate the causal link between an identified new missense mutation p...
November 23, 2016: Neurobiology of Disease
https://www.readbyqxmd.com/read/27888624/rhoa-regulates-resistance-to-irinotecan-by-regulating-membrane-transporter-and-apoptosis-signaling-in-colorectal-cancer
#14
Huang Ruihua, Zhang Mengyi, Zhao Chong, Qiu Meng, Ma Xin, Tang Qiulin, Bi Feng, Liu Ming
Colorectal cancer (CRC) is a major cause of mortality and morbidity worldwide. While surgery remains the mainstay of treatment in early stage CRC, chemotherapy is usually given to prolong the overall survival and improve the quality of life for metastatic colorectal cancer (mCRC). But drug resistance is one of the major hurdles of mCRC treatment, and the underlying mechanisms are still largely unknown. In this study, we show that, compared with parental cells, RhoA is up-regulated in irinotecan (CPT-11)-resistant CRC cells...
November 24, 2016: Oncotarget
https://www.readbyqxmd.com/read/27885446/post-cardiotomy-rescue-extracorporeal-cardiopulmonary-resuscitation-in-neonates-with-single-ventricle-after-intractable-cardiac-arrest-attrition-after-hospital-discharge-and-predictors-of-outcome
#15
Anastasios C Polimenakos, Vincent Rizzo, Chawki F El-Zein, Michel N Ilbawi
Extracorporeal cardiopulmonary resuscitation (ECPR) in children with cardiac arrest refractory to conventional cardiopulmonary resuscitation (CPR) has been reported with encouraging results. We reviewed outcomes of neonates with functional single ventricle (FSV) surviving post-cardiotomy ECPR after hospital discharge. Fifty-eight patients who required post-cardiotomy extracorporeal membrane oxygenation (ECMO) since the introduction of our ECPR protocol (January 2007-December 2011) were identified. Forty-one were neonates...
November 24, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27881781/blocking-the-interaction-between-ephb2-and-addls-by-a-small-peptide-rescues-impaired-synaptic-plasticity-and-memory-deficits-in-a-mouse-model-of-alzheimer-s-disease
#16
Xiao-Dong Shi, Kai Sun, Rui Hu, Xiao-Ya Liu, Qiu-Mei Hu, Xiao-Yu Sun, Bin Yao, Nan Sun, Jing-Ru Hao, Pan Wei, Yuan Han, Can Gao
: Soluble amyloid-β (Aβ) oligomers, also known as Aβ-derived diffusible ligands (ADDLs), are thought to be the key pathogenic factor in Alzheimer's disease (AD), but there is still no effective treatment for preventing or reversing the progression of the disease. Targeting NMDA receptor trafficking and regulation is a new strategy for early treatment of AD. Aβ oligomers have been found to bind to the fibronectin (FN) type III repeat domain of EphB2 to trigger EphB2 degradation, thereby impairing the normal functioning of NMDA receptors and resulting in cognitive deficits...
November 23, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27880903/mirnas-are-essential-for-the-regulation-of-the-pi3k-akt-foxo-pathway-and-receptor-editing-during-b%C3%A2-cell-maturation
#17
Maryaline Coffre, David Benhamou, David Rieß, Lili Blumenberg, Valentina Snetkova, Marcus J Hines, Tirtha Chakraborty, Sofia Bajwa, Kari Jensen, Mark M W Chong, Lelise Getu, Gregg J Silverman, Robert Blelloch, Dan R Littman, Dinis Calado, Doron Melamed, Jane A Skok, Klaus Rajewsky, Sergei B Koralov
B cell development is a tightly regulated process dependent on sequential rearrangements of immunoglobulin loci that encode the antigen receptor. To elucidate the role of microRNAs (miRNAs) in the orchestration of B cell development, we ablated all miRNAs at the earliest stage of B cell development by conditionally targeting the enzymes critical for RNAi in early B cell precursors. Absence of any one of these enzymes led to a block at the pro- to pre-B cell transition due to increased apoptosis and a failure of pre-B cells to proliferate...
November 22, 2016: Cell Reports
https://www.readbyqxmd.com/read/27879561/late-therapeutic-intervention-with-antibiotics-and-fluid-resuscitation-allows-for-a-prolonged-disease-course-with-high-survival-in-a-severe-murine-model-of-sepsis
#18
Allison M Steele, Marlene E Starr, Hiroshi Saito
Current animal models of sepsis often incorporate antibiotics to be consistent with clinical standards for treatment of patients in the ICU. However, such experimental intervention is commonly initiated very early after infectious insult, which likely blunts the progression of systemic inflammation and downstream pathology. The objective of this study was to establish an animal model of sepsis with delayed therapeutic intervention, allowing a longer disease course and downstream pathology, but still resulting in a high survival rate...
November 22, 2016: Shock
https://www.readbyqxmd.com/read/27879339/mct8-deficiency-in-purkinje-cells-disrupts-embryonic-chicken-cerebellar-development
#19
Joke Delbaere, Pieter Vancamp, Stijn L J Van Herck, Nele M A Bourgeois, Mary J Green, Richard J T Wingate, Veerle M Darras
Inactivating mutations in the human SLC16A2 gene encoding the thyroid hormone transporter monocarboxylate transporter 8 (MCT8) result in the Allan-Herndon-Dudley syndrome accompanied by severe locomotor deficits. The underlying mechanisms of the associated cerebellar maldevelopment were studied using the chicken as a model. Electroporation of an MCT8-RNAi vector into the cerebellar anlage of a 3-day-old embryo allowed knockdown of MCT8 in Purkinje cell precursors. This resulted in downregulation of the thyroid hormone responsive gene RORα and the Purkinje cell specific differentiation marker LHX1/5 at day 6...
November 22, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27877065/poor-adhesion-of-fentanyl-transdermal-patches-may-mimic-end-of-dosage-failure-after-48-hours-and-prompt-early-patch-replacement-in-hospitalized-cancer-pain-patients
#20
Isabelle Arnet, Sabrina Schacher, Eva Balmer, Dieter Koeberle, Kurt E Hersberger
CONTEXT: Renewal of fentanyl transdermal patch (transdermal therapeutic system [TTS]) should occur every 3 days (72 hours) according to manufacturer's guidelines. Some studies mentioned patients reporting end-of-dose failure, and thus, some authors recommend shortening the interval of application to 2 days (48 hours). However, reasons for early replacement are mostly unknown. OBJECTIVES: The objectives of this study were to assess the prevalence of early replacement of fentanyl TTS in a cancer center in Basel, Switzerland, and to assess the reasons for early replacement in stationary patients...
2016: Journal of Pain Research
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