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https://www.readbyqxmd.com/read/29457259/prosthetic-mitral-valve-thrombosis-malfunction-and-paroxysmal-mitral-regurgitation
#1
Nagaraja Moorthy, Rajiv Ananthakrishna, Dattatreya P V Rao, Satvic C Manjunath, Manjunath C Nanjappa
Intermittent dysfunction of mechanical mitral valve prosthesis is an uncommon condition. It carries serious clinical implications if unrecognized. Here, we present a case of a 28-year-old female with a history of rheumatic multivalvular disease, for which she had undergone double valve replacement and tricuspid annuloplasty. Six months later, she presented with heart failure. Clinical examination revealed intermittent loss of closing clicks followed by a pansystolic murmur at the apex, suggestive of mitral prosthetic valve dysfunction...
February 19, 2018: Echocardiography
https://www.readbyqxmd.com/read/29454121/complications-of-impulse-generator-exchange-surgery-for-deep-brain-stimulation-a-single-centre-retrospective-study
#2
Ann-Kristin Helmers, Isabel Lübbing, Falk Birkenfeld, Karsten Witt, Michael Synowitz, Hubertus Maximilian Mehdorn, Daniela Falk
OBJECTIVE: Non-rechargeable deep brain stimulation (DBS) impulse generators (IG) with a low or empty battery status require surgical IG exchange several years after initial implantation. Complication rates in patients undergoing DBS surgery range from 7.6% to 25.3%. The aim of this study was to investigate the complication rates after IG exchange surgery and to identify risk factors for complications. METHODS: We retrospectively analysed complications following IG exchange surgery from 2008 to 2015 in a single-centre university hospital setting...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29453918/high-dose-of-histone-deacetylase-inhibitors-affects-insulin-secretory-mechanism-of-pancreatic-beta-cell-line
#3
Eiji Yamato
OBJECTIVE: Histone deacytylase inhibitors (HDACis) inhibit the deacetylation of the lysine residue of proteins, including histones, and regulate the transcription of a variety of genes. Recently, HDACis have been used clinically as anti-cancer drugs and possible anti-diabetic drugs. Even though HDACis have been proven to protect the cytokine-induced damage of pancreatic beta cells, evidence also shows that high doses of HDACis are cytotoxic. In the present study, we, therefore, investigated the eff ect of HDACis on insulin secretion in a pancreatic beta cell line...
January 1, 2018: Endocrine Regulations
https://www.readbyqxmd.com/read/29453534/nanoparticles-caused-oxidative-imbalance
#4
Mariusz Zuberek, Agnieszka Grzelak
Application of nanomaterials in nearly every single branch of industry results in their accumulation in both abiotic environment and tissues of living organisms. Despite the common use of nanomaterials, we are not able to precisely define their toxicity towards humans and surrounding biota. Although we were able to determine final effects of chronic exposure to nanoparticles which consist of many pathologies such as respiratory diseases, allergies, diseases of cardiovascular system, disorders in embryonic life differentiation and growth disorders, toxic effects on the immune system and cancers...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29453480/limited-open-reduction-and-percutaneous-plate-osteosynthesis-alternative-option-to-minimally-invasive-plate-osteosynthesis-in-management-of-distal-tibia-fractures
#5
Shambhu Sah, Bikash Kc, Sailoj Jung Dangi, Rem Kumar Rai, Roshan Yadav
INTRODUCTION: The management of distal tibia fracture is challenging because of the limited soft tissue coverage and poor vascularity around the bone in that area. Minimally invasive percutaneous plate osteosynthesis is a novel technique in this regard but needs fluoroscopy. In unavailability of fluoroscopy or its technical malfunction, limited open reduction percutaneous plate osteosynthesis becomes useful. The aim of this study is to compare the outcomes of distal tibia fractures treated by LORPPO and MIPPO techniques in terms of duration of hospital stay, full weight bearing, union time and complications...
October 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/29453396/bone-marrow-lympho-myeloid-malfunction-in-obesity-requires-precursor-cell-autonomous-tlr4
#6
Ailing Liu, Minhui Chen, Rashmi Kumar, Maja Stefanovic-Racic, Robert M O'Doherty, Ying Ding, Willi Jahnen-Dechent, Lisa Borghesi
Obesity, a prevalent condition in adults and children, impairs bone marrow (BM) function. However, the underlying mechanisms are unclear. Here, we show that obese mice exhibit poor emergency immune responses in a toll-like receptor 4 (TLR4)-dependent manner. Canonical myeloid genes (Csf1r, Spi1, Runx1) are enhanced, and lymphoid genes (Flt3, Tcf3, Ebf1) are reduced. Using adoptive transfer and mixed BM chimera approaches we demonstrate that myeloid>lymphoid bias arises after 6 weeks of high-fat diet and depends on precursor cell-autonomous TLR4...
February 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29452360/the-role-of-transvenous-lead-extraction-in-the-management-of-redundant-or-malfunctioning-pacemaker-and-defibrillator-leads-post-electra
#7
Baldeep S Sidhu, Justin Gould, Benjamin Sieniewicz, Bradley Porter, Christopher A Rinaldi
Cardiac implantable electronic devices implantation rates have increased over the past decade due to broader indications and an ageing population. Similarly, device and lead complications have also risen. The management of pacemaker/defibrillator leads that are no longer required (redundant) or malfunctioning, can be contentious. There is a need to balance the risk of transvenous lead extraction (TLE) against those of lead abandonment. The recently published European Lead Extraction ConTRolled Registry (ELECTRa) study provides contemporary outcomes for TLE across Europe with important implications for the management of redundant and/or malfunctioning leads...
February 14, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29450727/metabolic-implications-of-hypoxia-and-pseudohypoxia-in-pheochromocytoma-and-paraganglioma
#8
REVIEW
Katarina Kluckova, Daniel A Tennant
Hypoxia is a critical driver of cancer pathogenesis, directly inducing malignant phenotypes such as epithelial-mesenchymal transition, stem cell-like characteristics and metabolic transformation. However, hypoxia-associated phenotypes are often observed in cancer in the absence of hypoxia, a phenotype known as pseudohypoxia, which is very well documented in specific tumour types, including in paraganglioma/pheochromocytoma (PPGL). Approximately 40% of the PPGL tumours carry a germ line mutation in one of a number of susceptibility genes of which those that are found in succinate dehydrogenase (SDH) or in von Hippel-Lindau (VHL) genes manifest a strong pseudohypoxic phenotype...
February 15, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29450726/c9orf72-associated-neurodegeneration-in-als-ftd-breaking-new-ground-in-ribosomal-rna-and-nucleolar-dysfunction
#9
REVIEW
Dustin Herrmann, Rosanna Parlato
Amyotrophic lateral sclerosis (ALS) and frontotemporal degeneration (FTD) are neurodegenerative diseases with distinct clinical appearance. However, both share as major genetic risk factor a C9orf72 locus intronic hexanucleotide expansion. The pathogenic pathways associated with the expansion-dependent neuronal toxicity are still poorly understood. Recent efforts to identify common threads of neuronal dysfunction have pointed towards deficits of ribosomal RNA (rRNA) biogenesis and loss of nucleolar integrity, a condition known as nucleolar stress that is an emerging shared feature among neurodegenerative diseases...
February 15, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29445774/an-evaluation-of-immunization-services-using-the-reaching-every-district-criteria-in-two-districts-of-gujarat-india
#10
J P Montgomery, P Ganguly, B F Carlson, N Shrivastwa, M L Boulton
Background: Immunizations are considered the most successful and cost-effective public health interventions employed today. While immunization coverage in India has improved dramatically in the last decade, areas of very low coverage persist. The University of Michigan School of Public Health and the Indian Institute of Public Health Gandhinagar collaborated to document strengths and weaknesses of immunization service delivery in two districts in India. Methods: This report describes a qualitative assessment of clinic level immunization service delivery in ten primary health centers (PHCs) located in two districts of Gujarat, India...
2018: Global Health Research and Policy
https://www.readbyqxmd.com/read/29445138/non-toxic-engineered-carbon-nanodiamond-concentrations-induce-oxidative-nitrosative-stress-imbalance-of-energy-metabolism-and-mitochondrial-dysfunction-in-microglial-and-alveolar-basal-epithelial-cells
#11
Claudia G Fresta, Aishik Chakraborty, Manjula B Wijesinghe, Angela M Amorini, Giacomo Lazzarino, Giuseppe Lazzarino, Barbara Tavazzi, Susan M Lunte, Filippo Caraci, Prajnaparamita Dhar, Giuseppe Caruso
Engineered nanoparticles are finding a wide spectrum of biomedical applications, including drug delivery and capacity to trigger cytotoxic phenomena, potentially useful against tumor cells. The full understanding of their biosafety and interactions with cell processes is mandatory. Using microglial (BV-2) and alveolar basal epithelial (A549) cells, in this study we determined the effects of engineered carbon nanodiamonds (ECNs) on cell viability, nitric oxide (NO) and reactive oxygen species (ROS) production, as well as on energy metabolism...
February 14, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29444453/efferocytosis-in-atherosclerotic-lesions-malfunctioning-regulatory-pathways-and-control-mechanisms
#12
REVIEW
Amir Tajbakhsh, Mehdi Rezaee, Petri T Kovanen, Amirhossein Sahebkar
Atherosclerosis is a dynamic and progressive inflammatory process in the intimal layer of large and medium-sized arteries, and it is the major contributor to the atherosclerotic cardiovascular disease (ACVD), the leading cause of death worldwide. In an atherosclerotic plaque, phagocytosis of apoptotic cells occurs through an intricate process designated efferocytosis. Defective efferocytosis has emerged as a causal factor in the etiopathogenesis of atherosclerosis and its progression into overt ACVD. Both specialized phagocytes (macrophages and dendritic cells) and non-specialized cells with phagocytic capabilities (smooth muscle and endothelial cells) are involved in the efferocytotic process...
February 11, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29444177/kidney-differentiated-cells-derived-from-lowe-syndrome-patient-s-ipscs-show-ciliogenesis-defects-and-six2-retention-at-the-golgi-complex
#13
Wen-Chieh Hsieh, Swetha Ramadesikan, Donna Fekete, Ruben Claudio Aguilar
Lowe syndrome is an X-linked condition characterized by congenital cataracts, neurological abnormalities and kidney malfunction. This lethal disease is caused by mutations in the OCRL1 gene, which encodes for the phosphatidylinositol 5-phosphatase Ocrl1. While in the past decade we witnessed substantial progress in the identification and characterization of LS patient cellular phenotypes, many of these studies have been performed in knocked-down cell lines or patient's cells from accessible cell types such as skin fibroblasts, and not from the organs affected...
2018: PloS One
https://www.readbyqxmd.com/read/29443856/complications-in-tube-thoracostomy-systematic-review-and-meta-analysis
#14
Matthew C Hernandez, Moustafah El Khatib, Larry Prokop, Martin D Zielinski, Johnathon M Aho
BACKGROUND: Tube thoracostomy (TT) complications and their reported rates are highly variable (1-40%) and inconsistently classified. Consistent TT complication classification must be applied to compare reported literature to standardize TT placement. We aim to determine the overall TT related complication rates in patients receiving TT for traumatic indications utilizing uniform definitions. METHOD: Systematic review and meta-analysis was performed assessing TT related complications...
February 14, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29443098/a-novel-in-vitro-live-imaging-assay-of-astrocyte-mediated-phagocytosis-using-ph-indicator-conjugated-synaptosomes
#15
Youkyeong Gloria Byun, Won-Suk Chung
Astrocytes are the major cell type in the brain and directly contact synapses and blood vessels. Although microglial cells have been considered the major immune cells and only phagocytes in the brain, recent studies have shown that astrocytes also participate in various phagocytic processes, such as developmental synapse elimination and clearance of amyloid beta plaques in Alzheimer's disease (AD). Despite these findings, the efficiency of astrocyte engulfment and degradation of their targets is unclear compared with that of microglia...
February 5, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29442324/rodent-zic-genes-in-neural-network-wiring
#16
Eloísa Herrera
The formation of the nervous system is a multistep process that yields a mature brain. Failure in any of the steps of this process may cause brain malfunction. In the early stages of embryonic development, neural progenitors quickly proliferate and then, at a specific moment, differentiate into neurons or glia. Once they become postmitotic neurons, they migrate to their final destinations and begin to extend their axons to connect with other neurons, sometimes located in quite distant regions, to establish different neural circuits...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29437243/melatonin-attenuates-smoking-induced-hyperglycemia-via-preserving-insulin-secretion-and-hepatic-glycogen-synthesis-in-rats
#17
Tianjia Li, Leng Ni, Zhewei Zhao, Xinnong Liu, Zhichao Lai, Xiao Di, Zhibo Xie, Xitao Song, Xuebin Wang, Rui Zhang, Changwei Liu
Epidemiology survey indicated that cigarette smoking is a risk factor of diabetes. However, the precise mechanisms remain to be clarified. In the current study, we found that smoking caused metabolic malfunctions on pancreas and liver in experimental animal model. These were indicated by hyperglycemia, increased serum hemoglobin A1c level and decreased insulin secretion, inhibition of liver glycogen synthase (LGS) and hepatic glycogen synthesis. Mechanistic studies revealed that all these alterations were caused by the inflammatory reaction and reactive oxygen species (ROS) induced by the smoking...
February 13, 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29435936/gene-manipulation-with-micro-rnas-at-single-human-cancer-cell
#18
Andres Stucky, Xuelian Chen, Jiang F Zhong
Micro RNAs (miRNAs) are small RNAs processed from longer precursor RNA transcripts that can fold back on themselves to form Watson-Crick paired hairpin structures. Once processed from the longer molecule, the small RNA is much too short to code for proteins but can play other very important roles, like gene regulation. The phenomenon of RNA interference was initially observed by Napoli and Jorgensen in transgenic petunia flowers, where gene suppression was observed after introducing a transgene of chalcone synthase (CHS) belonging to the flavonoid biosynthesis pathway...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29435927/gene-silencing-in-vitro-and-in-vivo-using-intronic-micrornas
#19
Shi-Lung Lin, Shao-Yao Ying
MicroRNAs (miRNAs), small single-stranded regulatory RNAs capable of interfering with intracellular messenger RNAs (mRNAs) that contain either complete or partial complementarity, are useful for the design of new therapies against cancer polymorphism and viral mutation. Numerous miRNAs have been reported to induce RNA interference (RNAi), a post-transcriptional gene-silencing mechanism. Recent evidence also indicates that they are involved in the transcriptional regulation of genome activities. They were first discovered in Caenorhabditis elegans as native RNA fragments that modulate a wide range of genetic regulatory pathways during embryonic development, and are now recognized as small gene silencers transcribed from the noncoding regions of a genome...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29433462/early-onset-neonatal-hyperkalemia-associated-with-maternal-hypermagnesemia-a-case-report
#20
Kenichi Tanaka, Hiroko Mori, Rieko Sakamoto, Shirou Matsumoto, Hiroshi Mitsubuchi, Kimitoshi Nakamura, Masanori Iwai
BACKGROUND: Neonatal nonoliguric hyperkalemia (NOHK) is a metabolic abnormality that occurs in extremely premature neonates at approximately 24 h after birth and is mainly due to the immature functioning of the sodium (Na + )/potassium (K + ) pump. Magnesium sulfate is frequently used in obstetrical practice to prevent preterm labor and to treat preeclampsia; this medication can also cause hypermagnesemia and hyperkalemia by a mechanism that is different from that of NOHK. Herein, we report the first case of very early-onset neonatal hyperkalemia induced by maternal hypermagnesemia...
February 13, 2018: BMC Pediatrics
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