keyword
MENU ▼
Read by QxMD icon Read
search

Irreversible

keyword
https://www.readbyqxmd.com/read/28214988/an-alternative-splice-variant-of-human-%C3%AE-a-crystallin-modulates-the-oligomer-ensemble-and-the-chaperone-activity-of-%C3%AE-crystallins
#1
Waldemar Preis, Annika Bestehorn, Johannes Buchner, Martin Haslbeck
In humans, ten genes encode small heat shock proteins with lens αA-crystallin and αB-crystallin representing two of the most prominent members. The canonical isoforms of αA-crystallin and αB-crystallin collaborate in the eye lens to prevent irreversible protein aggregation and preserve visual acuity. α-Crystallins form large polydisperse homo-oligomers and hetero-oligomers and as part of the proteostasis system bind substrate proteins in non-native conformations, thereby stabilizing them. Here, we analyzed a previously uncharacterized, alternative splice variant (isoform 2) of human αA-crystallin with an exchanged N-terminal sequence...
February 18, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28214967/increased-atrial-%C3%AE-adrenergic-receptors-and-grk-2-gene-expression-can-play-a-fundamental-role-in-heart-failure-after-repair-of-congenital-heart-disease-with-cardiopulmonary-bypass
#2
Marcela Silva Oliveira, Fabio Carmona, Walter V A Vicente, Paulo H Manso, Karina M Mata, Mara Rúbia Celes, Erica C Campos, Simone G Ramos
Surgeries to correct congenital heart diseases are increasing in Brazil and worldwide. However, even with the advances in surgical techniques and perfusion, some cases, especially the more complex ones, can develop heart failure and death. A retrospective study of patients who underwent surgery for correction of congenital heart diseases with cardiopulmonary bypass (CPB) in a university tertiary-care hospital that died, showed infarction in different stages of evolution and scattered microcalcifications in the myocardium, even without coronary obstruction...
February 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28214370/the-effect-of-pre-operative-submucosal-administration-of-tramadol-on-the-success-rate-of-inferior-alveolar-nerve-blocks-on-mandibular-molars-with-acute-irreversible-pulpitis-a-randomized-double-blind-clinical-trial
#3
A De Pedro-Muñoz, J Mena-Álvarez
AIM: This randomized, double-blind, placebo controlled, clinical trial was designed to improve the success of inferior alveolar nerve blocks (IANB) in mandibular molars with symptomatic irreversible pulpitis (SIP) by means of pre-operative submucosal administration of 50mg tramadol. METHODOLOGY: Forty-two patients with a mandibular molar diagnosed with symptomatic irreversible pulpitis took part in the trial. Patients were assigned randomly to one of two groups: tramadol group (n=21), who received 50mg tramadol in 1mL by mandibular infiltration, and a placebo group (n=21), who received 1 mL of normal saline administered to the affected tooth by the same means...
February 18, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28213846/fixation-of-bovine-pericardium-based-tissue-biomaterial-with-irreversible-chemistry-improves-biochemical-and-biomechanical-properties
#4
H Tam, W Zhang, D Infante, N Parchment, M Sacks, N Vyavahare
Bioprosthetic heart valves (BHVs), derived from glutaraldehyde crosslinked (GLUT) porcine aortic valve leaflets or bovine pericardium (BP), are used to replace defective heart valves. However, valve failure can occur within 12-15 years due to calcification and/or progressive structural degeneration. We present a novel fabrication method that utilizes carbodiimide, neomycin trisulfate, and pentagalloyl glucose crosslinking chemistry (TRI) to better stabilize the extracellular matrix of BP. We demonstrate that TRI-treated BP is more compliant than GLUT-treated BP...
February 17, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28213515/hendra-virus-fusion-protein-transmembrane-domain-contributes-to-pre-fusion-protein-stability
#5
Stacy Webb, Tamas Nagy, Hunter Moseley, Michael Fried, Rebecca Ellis Dutch
Enveloped viruses utilize fusion (F) proteins studding the surface of the virus to facilitate membrane fusion with a target cell membrane. Fusion of the viral envelope with a cellular membrane is required for release of viral genomic material so the virus can ultimately reproduce and spread. To drive fusion, the F protein undergoes an irreversible conformational change, transitioning from a meta-stable pre-fusion conformation to a more thermodynamically stable post-fusion structure. Understanding the elements which control stability of the pre-fusion state and triggering to the post-fusion conformation is important for understanding F protein function...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28213322/study-of-processes-influencing-bioavailability-of-pesticides-in-wood-soil-systems-effect-of-different-factors
#6
J M Marín-Benito, E Herrero-Hernández, M S Rodríguez-Cruz, M Arienzo, M J Sánchez-Martín
Lignocellulosic wastes and by-products containing lignin are now available in large amounts from forestry and industrial activities, and could be promising organic materials for the biosorption of pesticides by soils in order to reduce point-source pollution. Adding these materials to soil requires understanding the process of pesticide sorption-desorption by wood-soils, as sorption capacity could increase, with changes in pesticide bioavailability and final fate. The objective of this work was to study the effect that pine and oak wood added to soils had on the sorption/desorption of the pesticides linuron, alachlor, and metalaxyl...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28213141/thermostability-of-photosystem-i-trimers-and-monomers-from-the-cyanobacterium-thermosynechococcus-elongatus
#7
Vladimir V Shubin, Irina V Terekhova, Yulia V Bolychevtseva, Eithar El-Mohsnawy, Matthias Rögner, Werner Mäntele, Marta J Kopczak, Enela Džafić
The performance of solar energy conversion into alternative energy sources in artificial systems highly depends on the thermostability of photosystem I (PSI) complexes Terasaki et al. (2007), Iwuchukwu et al. (2010), Kothe et al. (2013) . To assess the thermostability of PSI complexes from the thermophilic cyanobacterium Thermosynechococcus elongatus heating induced perturbations on the level of secondary structure of the proteins were studied. Changes were monitored by Fourier transform infrared (FT-IR) spectra in the mid-IR region upon slow heating (1°C per minute) of samples in D2O phosphate buffer (pD 7...
February 6, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28212821/cloning-and-molecular-characterization-of-the-betaine-aldehyde-dehydrogenase-involved-in-the-biosynthesis-of-glycine-betaine-in-white-shrimp-litopenaeus-vannamei
#8
María F Delgado-Gaytán, Jesús A Rosas-Rodríguez, Gloria Yepiz-Plascencia, Ciria G Figueroa-Soto, Elisa M Valenzuela-Soto
The enzyme betaine aldehyde dehydrogenase (BADH) catalyzes the irreversible oxidation of betaine aldehyde to glycine betaine (GB), a very efficient osmolyte accumulated during osmotic stress. In this study, we determined the nucleotide sequence of the cDNA for the BADH from the white shrimp Litopenaeus vannamei (LvBADH). The cDNA was 1882 bp long, with a complete open reading frame of 1524 bp, encoding 507 amino acids with a predicted molecular mass of 54.15 kDa and a pI of 5.4. The predicted LvBADH amino acid sequence shares a high degree of identity with marine invertebrate BADHs...
February 14, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28212635/impact-of-semi-solid-formulations-on-skin-penetration-of-iron-oxide-nanoparticles
#9
Umberto M Musazzi, Benedetta Santini, Francesca Selmin, Valentina Marini, Fabio Corsi, Raffaele Allevi, Anna M Ferretti, Davide Prosperi, Francesco Cilurzo, Miriam Colombo, Paola Minghetti
BACKGROUND: This work aimed to provide useful information on the incidence of the choice of formulation in semi-solid preparations of iron-oxide nanoparticles (IONs). The appropriate analytical methods to assess the IONs physical stability and the effect of the semi-solid preparations on IONs human skin penetration were discussed. The physical stability of IONs (Dh = 31 ± 4 nm; ζ = -65 ± 5 mV) loaded in five semi-solid preparations (0.3% w/v), namely Carbopol gel (CP), hydroxyethyl cellulose gel (HEC), carboxymethylcellulose gel (CMC), cetomacrogol cream (Cet) and cold cream was assessed by combining DLS and low-field pulsed NMR data...
February 17, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28212538/sevoflurane-preconditioning-induced-endogenous-neurogenesis-against-ischemic-brain-injury-by-promoting-microglial-activation
#10
Li Li, Hexige Saiyin, Jingmo Xie, Lixiang Ma, Lei Xue, Wei Wang, Weimin Liang, Qiong Yu
Brain ischemia causes irreversible damage to functional neurons in cases of infarct. Promoting endogenous neurogenesis to replace necrotic neurons is a promising therapeutic strategy for ischemia patients. The neuroprotective role of sevoflurane preconditioning implies that it might also enhance endogenous neurogenesis and functional restoration in the infarct region. By using a transient middle cerebral artery occlusion (tMCAO) model, we discovered that endogenous neurogenesis was enhanced by sevoflurane preconditioning...
February 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28211326/evaluation-of-in%C3%A2-vivo-and-in%C3%A2-vitro-toxicological-and-genotoxic-potential-of-aluminum-chloride
#11
Letícia Nazareth Fernandes Paz, Laís Mesquita Moura, Danielle Cristinne A Feio, Mirella de Souza Gonçalves Cardoso, Wagner Luiz O Ximenes, Raquel C Montenegro, Ana Paula N Alves, Rommel R Burbano, Patrícia Danielle L Lima
Aluminum and its compounds are common contaminants of water and food, as well as medications and cosmetics. The wide distribution of the element facilitates the demand for detailed studies of its biological and toxicological effects. This work aimed to evaluate the possible genotoxic and toxic activity resulting from in vivo and in vitro exposure to Al. For in vivo analysis, 40 Swiss mice were used, various concentrations of hydrated aluminum chloride were administered orally. They were analyzed for possible genic activity and metal cytotoxicity using a micronucleus test (MN), and for toxicity through histopathological evaluation of the extracted organs...
February 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28210622/epigenetics-and-signaling-pathways-in-glaucoma
#12
REVIEW
Angela C Gauthier, Ji Liu
Glaucoma is the most common cause of irreversible blindness worldwide. This neurodegenerative disease becomes more prevalent with aging, but predisposing genetic and environmental factors also contribute to increased risk. Emerging evidence now suggests that epigenetics may also be involved, which provides potential new therapeutic targets. These three factors work through several pathways, including TGF-β, MAP kinase, Rho kinase, BDNF, JNK, PI-3/Akt, PTEN, Bcl-2, Caspase, and Calcium-Calpain signaling. Together, these pathways result in the upregulation of proapoptotic gene expression, the downregulation of neuroprotective and prosurvival factors, and the generation of fibrosis at the trabecular meshwork, which may block aqueous humor drainage...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28210181/causes-of-irreversible-unilateral-or-bilateral-blindness-in-the-al-baha-region-of-the-kingdom-of-saudi-arabia
#13
Huda Farhan Alghamdi
PURPOSE: To determine the causes of irreversible unilateral and bilateral blindness that cannot be rehabilitated medically, optically nor surgically in Al Baha province, Kingdom of Saudi Arabia. METHODS: There were a retrospective chart review and examination of patients presenting to King Fahad Hospital Al Baha, Saudi Arabia, with unilateral or bilateral blindness from June 2011 to September 2011. Blindness was defined as best corrected visual acuity (BCVA) of less than 0...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28209764/kcnj11-ablation-is-associated-with-increased-nitro-oxidative-stress-during-ischemia-reperfusion-injury-implications-for-human-ischemic-cardiomyopathy
#14
Bo Zhang, Tatiana Novitskaya, Debra G Wheeler, Zhaobin Xu, Elena Chepurko, Ryan Huttinger, Heng He, Saradhadevi Varadharaj, Jay L Zweier, Yanna Song, Meng Xu, Frank E Harrell, Yan Ru Su, Tarek Absi, Mark J Kohr, Mark T Ziolo, Dan M Roden, Christian M Shaffer, Cristi L Galindo, Quinn S Wells, Richard J Gumina
BACKGROUND: Despite increased secondary cardiovascular events in patients with ischemic cardiomyopathy (ICM), the expression of innate cardiac protective molecules in the hearts of patients with ICM is incompletely characterized. Therefore, we used a nonbiased RNAseq approach to determine whether differences in cardiac protective molecules occur with ICM. METHODS AND RESULTS: RNAseq analysis of human control and ICM left ventricular samples demonstrated a significant decrease in KCNJ11 expression with ICM...
February 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28209559/irreversible-electroporation-for-the-ablation-of-renal-cell-carcinoma-a-prospective-human-in-vivo-study-protocol-ideal-phase-2b
#15
Mara Buijs, Krijn P van Lienden, Peter Gk Wagstaff, Matthijs Jv Scheltema, Daniel M de Bruin, Patricia J Zondervan, Otto M van Delden, Ton G van Leeuwen, Jean Jmch de la Rosette, M Pilar Laguna
BACKGROUND: Irreversible electroporation (IRE) is an emerging technique delivering electrical pulses to ablate tissue, with the theoretical advantage to overcome the main shortcomings of conventional thermal ablation. Recent short-term research showed that IRE for the ablation of renal masses is a safe and feasible treatment option. In an ablate and resect design, histopathological analysis 4 weeks after radical nephrectomy demonstrated that IRE-targeted renal tumors were completely covered by ablation zone...
February 16, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28208905/n-acetylcysteine-combined-with-home-based-physical-activity-effect-on-health-related-quality-of-life-in-stable-copd-patients-a-randomised-controlled-trial
#16
Vijay Tukaram Salve, Jitesh S Atram
INTRODUCTION: Quality of life is adversely affected in Chronic Obstructive Pulmonary Disease (COPD), due to irreversible, progressive nature of the disease and limitations of current treatment options available. One of the important aim of treatment of COPD is to improve Quality of Life (QoL). Cigarette smoke contains numerous free radicals and other oxidants. Oxidative stress has been implicated in pathogenesis, progression of disease and exacerbation in COPD. Pulmonary tuberculosis, outdoor and indoor air pollution and many others are aetiologies of COPD in non-smokers...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208469/entropy-production-and-irreversibility-of-dissipative-trajectories-in-electric-circuits
#17
K-H Chiang, C-L Lee, P-Y Lai, Y-F Chen
We experimentally examine the equivalence between the entropy production evaluated from irreversibility of trajectories and the physical dissipation in dissipative processes via electric resistor-capacitor (RC) circuits. The examinations are performed for two nonequilibrium steady states that are driven by an injected current and temperature difference, respectively. Such an equivalence demonstrates a parameter-free method to evaluate the entropy production of a system. The effects of configurational and temporal resolutions are also studied...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208468/colloidal-polycrystalline-monolayers-under-oscillatory-shear
#18
Ivo Buttinoni, Mathias Steinacher, Hendrik Th Spanke, Juho Pokki, Severin Bahmann, Bradley Nelson, Giuseppe Foffi, Lucio Isa
In this paper we probe the structural response to oscillatory shear deformations of polycrystalline monolayers of soft repulsive colloids with varying area fraction over a broad range of frequencies and amplitudes. The particles are confined at a fluid interface, sheared using a magnetic microdisk, and imaged through optical microscopy. The structural and mechanical response of soft materials is highly dependent on their microstructure. If crystals are well understood and deform through the creation and mobilization of specific defects, the situation is much more complex for disordered jammed materials, where identifying structural motifs defining plastically rearranging regions remains an elusive task...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208403/exactly-solvable-model-for-cluster-size-distribution-in-a-closed-system
#19
V G Dubrovskii
We obtain an exact solution for the cluster-size distributions in a closed system described by nonlinear rate equations for irreversible homogeneous growth with size-linear agglomeration rates of the form K_{s}=D(a+s-1) for all s≥1, where D is the diffusion coefficient, s is the size, and a is a positive constant. The size spectrum is given by the Pólya distribution times a factor that normalizes the first moment of the distribution to unity and zeroes out the monomer concentration at t→∞. We show that the a value sets a maximum mean size that equals e for large a and tends to infinity only when a→0...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28207919/tardive-dyskinesia-21st-century-may-bring-new-treatments-to-a-forgotten-disorder
#20
Gopalkumar Rakesh, Andrew Muzyk, Steven T Szabo, Sanjay Gupta, Chi-Un Pae, Prakash Masand
BACKGROUND: Tardive dyskinesia (TD) is a condition that was first described nearly 60 years ago. Despite the tremendous amount of research on pathophysiology and numerous follow-up studies to understand the course and prognosis of TD, effective treatment of the condition continued to elude us until recently. METHODS: We review and summarize clinical literature on TD, as well as provide an update on new treatments available. RESULTS: The emergence of tetrabenazine as a treatment modality decreased suffering and improved quality of life for patients...
February 1, 2017: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
keyword
keyword
81297
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"