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https://www.readbyqxmd.com/read/29334650/environmentally-relevant-concentrations-of-glibenclamide-induce-oxidative-stress-in-common-carp-cyprinus-carpio
#1
Ericka María Guadalupe Martínez-Viveros, Hariz Islas-Flores, Octavio Dublán-García, Marcela Galar-Martínez, Nely SanJuan-Reyes, Sandra García-Medina, María Dolores Hernández-Navarro, Leobardo Manuel Gómez-Oliván
The hypoglycemic pharmaceutical glibenclamide (GLB) is widely used around the world. This medication is released into the environment by municipal, hospital and industrial wastewater discharges. Although there are reports of its environmental occurrence in the scientific literature, toxicity studies on aquatic species of commercial interest such as the common carp Cyprinus carpio are scarce. The present study aimed to evaluate the oxidative stress induced on C. carpio by environmentally relevant concentrations of GLB...
January 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/29334041/autoantibodies-to-low-density-lipoprotein-receptor-related-protein-4-in-double-seronegative-myasthenia-gravis-a-systematic-review
#2
Stephen Bacchi, Philippe Kramer, Colin Chalk
BACKGROUND: Myasthenia gravis (MG) is an autoimmune disorder of the neuromuscular junction in which a clinical diagnosis may be confirmed with serological testing. The most common autoantibodies used to support a diagnosis of MG are anti-acetylcholine receptor antibodies and anti-muscle-specific tyrosine kinase antibodies. In cases in which both of these autoantibodies are negative (termed double-seronegative [dSNMG]), other autoantibodies such as low-density lipoprotein receptor-related protein 4 (LRP4) may be used to aid in diagnosis...
January 2018: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/29333545/dynamic-changes-in-copper-homeostasis-and-post-transcriptional-regulation-of-atp7a-during-myogenic-differentiation
#3
Katherine E Vest, Amanda L Paskavitz, Joseph B Lee, Teresita Padilla-Benavides
Copper (Cu) is an essential metal required for activity of a number of redox active enzymes that participate in critical cellular pathways such as metabolism and cell signaling. Because it is also a toxic metal, Cu must be tightly controlled by a series of transporters and chaperone proteins that regulate Cu homeostasis. The critical nature of Cu is highlighted by the fact that mutations in Cu homeostasis genes cause pathologic conditions such as Menkes and Wilson diseases. While Cu homeostasis in highly affected tissues like the liver and brain is well understood, no study has probed the role of Cu in development of skeletal muscle, another tissue that often shows pathology in these conditions...
January 15, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29332935/novel-treatment-strategies-for-chronic-kidney-disease-insights-from-the-animal-kingdom
#4
REVIEW
Peter Stenvinkel, Johanna Painer, Makoto Kuro-O, Miguel Lanaspa, Walter Arnold, Thomas Ruf, Paul G Shiels, Richard J Johnson
Many of the >2 million animal species that inhabit Earth have developed survival mechanisms that aid in the prevention of obesity, kidney disease, starvation, dehydration and vascular ageing; however, some animals remain susceptible to these complications. Domestic and captive wild felids, for example, show susceptibility to chronic kidney disease (CKD), potentially linked to the high protein intake of these animals. By contrast, naked mole rats are a model of longevity and are protected from extreme environmental conditions through mechanisms that provide resistance to oxidative stress...
January 15, 2018: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/29332916/mir-135a-promotes-inflammatory-responses-of-vascular-smooth-muscle-cells-from-db-db-mice-via-downregulation-of-foxo1
#5
Xiaochun Lu, Dawei Yin, Bo Zhou, Tieling Li
It has been shown that microRNAs (miRNAs) greatly affect the functions of vascular smooth muscle cells (VSMC), but the effects of mRNAs under diabetic conditions remain unclear.Using a model of diabetic db/db mice, we studied the functions of microRNA-135a (miR-135a) during VSMC dysfunction.Compared to control WT mice, miR-135a expression in VSMC was significantly increased while the level of forkhead box O1 (FOXO1) protein decreased significantly. After transfecting miR-135a mimics into VSMC, the expression of FOXO1 was decreased, while cyclooxygenase-2 (COX-2) and monocyte chemoattractant protein-1 (MCP-1) expression levels were increased, thus promoting the interaction between monocytes and WT VSMC...
January 15, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29332268/methylmercury-intoxication-promotes-metallothionein-response-and-cell-damage-in-salivary-glands-of-rats
#6
Leidiane Alencar de Oliveira Lima, Leonardo Oliveira Bittencourt, Bruna Puty, Rafael Monteiro Fernandes, Priscila Cunha Nascimento, Marcia Cristina Freitas Silva, Sérgio Melo Alves-Junior, João de Jesus Viana Pinheiro, Rafael Rodrigues Lima
Environmental and occupational mercury exposure is considered a major public health issue. Despite being well known that MeHg exposure causes adverse effects in several physiologic functions, MeHg effects on salivary glands still not completely elucidated. Here, we investigated the cellular MeHg-induced damage in the three major salivary glands (parotid, submandibular, and sublingual) of adult rats after chronic, systemic and low doses of MeHg exposure. Rats were exposed by 0.04 mg/kg/day over 60 days. After that, animals were euthanized and all three glands were collected...
January 14, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29332246/an-historical-perspective-of-the-discovery-of-titin-filaments-part-2
#7
REVIEW
Cristobal G Dos Remedios
In 2017, a Special Issue of Biophysical Reviews was devoted to "Titin and Its Binding Partners. The issue contained a review: "An historical perspective of the discovery of titin filaments" by dos Remedios and Gilmour that was intended to be a history of the discovery of the giant protein titin, previously named connectin. The review took readers back to the earliest discovery of the so-called third filament component of skeletal and cardiac muscle sarcomeres and ended in 1969. Recently, my colleague Shin'ichi Ishiwata gently reminded me of two papers published in 1990 and 1993 that were unwittingly omitted from the original historical perspective...
January 13, 2018: Biophysical Reviews
https://www.readbyqxmd.com/read/29332162/roles-of-irisin-in-the-linkage-from-muscle-to-bone-during-mechanical-unloading-in-mice
#8
Naoyuki Kawao, Akihiro Moritake, Kohei Tatsumi, Hiroshi Kaji
Mechanical unloading induces disuse muscle atrophy and bone loss, but the details in mechanism involved in those pathophysiological conditions are not fully understood. Interaction between muscle and bone has been recently noted. Here, we investigated the roles of humoral factors linking muscle to bone during mechanical unloading using mice with hindlimb unloading (HU) and sciatic neurectomy (SNX). HU and SNX reduced muscle volume surrounding the tibia, tissue weights of soleus and gastrocnemius muscle, and trabecular bone mineral density (BMD) in the tibia of mice...
January 13, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29331806/unifying-in%C3%A2-vitro-and-in%C3%A2-vivo-ivt-mrna-expression-discrepancies-in-skeletal-muscle-via-mechanotransduction
#9
Sushma M Bhosle, Kristin H Loomis, Jonathan L Kirschman, Emmeline L Blanchard, Daryll A Vanover, Chiara Zurla, Damien Habrant, Darin Edwards, Patrick Baumhof, Bruno Pitard, Philip J Santangelo
The translational efficiency of an in vitro transcribed (IVT) mRNA was measured upon delivery to primary skeletal muscle cells and to a mouse model system, towards the development of a predictive in vitro assay for the screening and validation of intramuscular mRNA-based vaccines. When IVT mRNA was delivered either naked or complexed with novel aminoglycoside-based delivery vehicles, significant differences in protein expression in vitro and in vivo were observed. We hypothesized that this previously anticipated discrepancy was due to differences in the mechanism of IVT mRNA endosomal entry and release following delivery...
January 6, 2018: Biomaterials
https://www.readbyqxmd.com/read/29331586/positive-effects-of-total-recovery-period-on-anti-and-pro-inflammatory-cytokines-are-not-linked-to-performance-re-establishment-in-overtrained-mice
#10
Alisson L da Rocha, Ana P Pinto, Bruno C Pereira, Eike B Kohama, Gustavo P Morais, Larissa G de Vicente, José R Pauli, Dennys E Cintra, Eduardo R Ropelle, Leandro P de Moura, Hugo T Filho, Adelino S R da Silva
The association between excessive training sessions (i.e., overtraining/OT) and periods of inadequate recovery is linked to the nonfunctional overreaching (NFOR) state, which is defined as an unexplained decrement or stagnation of performance. The cytokine hypothesis of OT considers that pro-inflammatory cytokines are responsible by the NFOR state-induced performance decrement. Investigations using rodent models of OT verified increased levels of pro-inflammatory cytokines in hypothalamus, liver, serum and skeletal muscle samples...
January 10, 2018: Cytokine
https://www.readbyqxmd.com/read/29331521/increased-transcript-levels-and-kinetic-function-of-pyruvate-kinase-during-severe-dehydration-in-aestivating-african-clawed-frogs-xenopus-laevis
#11
Neal J Dawson, Yulia Biggar, Amal I Malik, Kenneth B Storey
The African clawed frog, Xenopus laevis, can withstand extremely arid conditions through aestivation, resulting in dehydration and urea accumulation. Aestivating X. laevis reduce their metabolic rate, and rely on anaerobic glycolysis to meet reduced ATP demands. The present study investigated how severe dehydration affected the transcript levels, kinetic profile, and phosphorylation state of the key glycolytic enzyme pyruvate kinase (PK) in the liver and skeletal muscle of X. laevis. Compared to control frogs, severely dehydrated frogs showed an increase in the transcript abundance of both liver and muscle isoforms of PK...
January 10, 2018: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29331378/loss-of-zebrafish-smyd1a-interferes-with-myofibrillar-integrity-without-triggering-the-misfolded-myosin-response
#12
Christoph Paone, Steven Rudeck, Christelle Etard, Uwe Strähle, Wolfgang Rottbauer, Steffen Just
Sarcomeric protein turnover needs to be tightly balanced to assure proper assembly and renewal of sarcomeric units within muscle tissues. The mechanisms regulating these fundamental processes are only poorly understood, but of great clinical importance since many cardiac and skeletal muscle diseases are associated with defective sarcomeric organization. The SET- and MYND domain containing protein 1b (Smyd1b) is known to play a crucial role in myofibrillogenesis by functionally interacting with the myosin chaperones Unc45b and Hsp90α1...
January 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29331367/molecular-characterization-and-differential-expression-analysis-of-interleukin-1%C3%AE-from-ovis-aries
#13
Yi-Ming Shui, Shi-Ying Lu, Xing Guo, Xi-Lin Liu, Bao-Quan Fu, Pan Hu, Lin-Lin Qu, Nan-Nan Liu, Yan-Song Li, Lu-Lu Wang, Fei-Fei Zhai, Dan-Di Ju, Zeng-Shan Liu, Yu Zhou, Hong-Lin Ren
The interleukin-1 family is an important component of the innate immune system and plays an important role in regulating immune responses on the invasion of intracellular parasites in the acquired immune system. Interleukin 1β (IL-1β) is one of the members of the IL-1 family that predominantly activates downstream signaling pathways to play immunological functions of stimulating T and B lymphocyte activation and promoting the various syntheses of inflammatory substances in conjunction with other cytokines...
January 10, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29331337/elastin-in-lung-development-and-disease-pathogenesis
#14
REVIEW
Robert P Mecham
Elastin is expressed in most tissues that require elastic recoil. The protein first appeared coincident with the closed circulatory system, and was critical for the evolutionary success of the vertebrate lineage. Elastin is expressed by multiple cell types in the lung, including mesothelial cells in the pleura, smooth muscle cells in airways and blood vessels, endothelial cells, and interstitial fibroblasts. This highly crosslinked protein associates with fibrillin-containing microfibrils to form the elastic fiber, which is the physiological structure that functions in the extracellular matrix...
January 10, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29331264/altered-levels-of-the-splicing-factor-muscleblind-modifies-cerebral-cortical-function-in-mouse-models-of-myotonic-dystrophy
#15
Gang Chen, Russell E Carter, John D Cleary, Tammy S Reid, Laura P Ranum, Maurice S Swanson, Timothy J Ebner
Myotonic dystrophy (DM) is a progressive, multisystem disorder affecting skeletal muscle, heart, and central nervous system. In both DM1 and DM2, microsatellite expansions of CUG and CCUG RNA repeats, respectively, accumulate and disrupt functions of alternative splicing factors, including muscleblind (MBNL) proteins. Grey matter loss and white matter changes, including the corpus callosum, likely underlie cognitive and executive function deficits in DM patients. However, little is known how cerebral cortical circuitry changes in DM...
January 10, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29331171/the-genotypic-and-phenotypic-spectrum-of-mto1-deficiency
#16
James J O'Byrne, Maja Tarailo-Graovac, Aisha Ghani, Michael Champion, Charu Deshpande, Ali Dursun, Riza K Ozgul, Peter Freisinger, Ian Garber, Tobias B Haack, Rita Horvath, Ivo Barić, Ralf A Husain, Leo A J Kluijtmans, Urania Kotzaeridou, Andrew A Morris, Colin J Ross, Saikat Santra, Jan Smeitink, Mark Tarnopolsky, Saskia B Wortmann, Johannes A Mayr, Michaela Brunner-Krainz, Holger Prokisch, Wyeth W Wasserman, Ron A Wevers, Udo F Engelke, Richard J Rodenburg, Teck Wah Ting, Robert McFarland, Robert W Taylor, Ramona Salvarinova, Clara D M van Karnebeek
BACKGROUND: Mitochondrial diseases, a group of multi-systemic disorders often characterized by tissue-specific phenotypes, are usually progressive and fatal disorders resulting from defects in oxidative phosphorylation. MTO1 (Mitochondrial tRNA Translation Optimization 1), an evolutionarily conserved protein expressed in high-energy demand tissues has been linked to human early-onset combined oxidative phosphorylation deficiency associated with hypertrophic cardiomyopathy, often referred to as combined oxidative phosphorylation deficiency-10 (COXPD10)...
January 2018: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29331079/lmod3-associated-nemaline-myopathy-prenatal-ultrasonographic-pathologic-and-molecular-findings
#17
Michal Berkenstadt, Ben Pode-Shakked, Ortal Barel, Hila Barash, Reuven Achiron, Yinon Gilboa, Dvora Kidron, Annick Raas-Rothschild
To describe the prenatal presentation, including ultrasonographic, histologic, and molecular findings, in 2 fetuses affected with LMOD3-related nemaline myopathy. Prenatal ultrasonographic examinations and histopathologic studies were performed on 2 fetuses with evidence of nemaline myopathy. To establish a molecular diagnosis, whole-exome sequencing was pursued for the affected fetuses. Nemaline myopathy is a common form of congenital myopathy manifesting with nonprogressive generalized muscle weakness, hypotonia, and electron-dense protein inclusions in skeletal myofibers...
January 13, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29331050/exercise-counteracts-lipotoxicity-by-improving-lipid-turnover-and-lipid-droplet-quality
#18
Evelyn Zacharewicz, Matthijs K C Hesselink, Patrick Schrauwen
The incidence of obesity and metabolic disease, such as type 2 diabetes mellitus (T2D), are rising globally. Dietary lipid over-supply leads to lipid accumulation at ectopic sites, such as skeletal muscle. Ectopic lipid storage is highly correlated with insulin resistance and T2D, likely due to a loss of metabolic flexibility - the capacity to switch between fat and glucose oxidation upon insulin stimulation - and cellular dysfunction because of lipotoxicity. However, muscle lipid levels are also elevated in endurance trained athletes, presenting a paradoxical phenotype of increased intramuscular lipids along with high insulin sensitivity - the "athletes' paradox"...
January 13, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29330928/specific-labelling-of-myonuclei-by-an-antibody-against-pericentriolar-material-1-pcm1-on-skeletal-muscle-tissue-sections
#19
I M Winje, M Bengtsen, E Eftestøl, I Juvkam, J C Bruusgaard, K Gundersen
AIM: Skeletal muscle is a heterogeneous tissue containing several different cell types and only about 40 - 50% of the cell nuclei within the tissue belong to myofibres. Existing technology, attempting to distinguish myonuclei from other nuclei at the light microscopy level, has led to controversies in our understanding of the basic cell biology of muscle plasticity. The present study aims at demonstrating that an antibody against the protein Pericentriolar material 1 (PCM1) can be used to reliably identify myonuclei on histological cross sections from humans, mice and rats...
January 13, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29330836/pathogenesis-of-non-alcoholic-fatty-liver-disease-mediated-by-yap
#20
Ping Chen, Qihui Luo, Chao Huang, Qi Gao, Like Li, Jingfei Chen, Bing Chen, Wentao Liu, Wen Zeng, Zhengli Chen
OBJECTIVE: This study aimed to investigate the mechanism of the interaction between Yes-associated protein (YAP) and transforming growth factor-β (TGF-β)/Smad signaling pathways in the development of non-alcoholic fatty liver disease (NAFLD). METHODS: Serum samples of monkeys with biopsy-proven NAFLD and healthy normal monkeys were used to measure fasting plasma glucose (FPG), low-density lipoprotein (LDL), high-density lipoprotein (HDL), triglyceride (TG) and albumin (ALB) with the BECKMAN CX5 PRO...
January 12, 2018: Hepatology International
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