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Acid base disturbance

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https://www.readbyqxmd.com/read/28433166/chitosan-graphene-oxide-films-and-co2-dried-porous-aerogel-microspheres-interfacial-interplay-and-stability
#1
Sana Frindy, Ana Primo, Hamid Ennajih, Abou El Kacem Qaiss, Rachid Bouhfid, Mohamed Lahcini, El Mokhtar Essassi, Hermenegildo Garcia, Abdelkrim El Kadib
The intimate interplay of chitosan (CS) and graphene oxide (GO) in aqueous acidic solution has been explored to design upon casting, nanostructured "brick-and-mortar" films (CS-GO-f) and by acidic-to-basic pH inversion, porous CO2-dried aerogel microspheres (CS-GO-m). Owing to the presence of oxygenated functional groups in GO, good-quality crack-free hybrid films were obtained. Mechanical properties were improved independently of the GO content and it was found that a 20wt% loading affords hybrid film characterized with a Young modulus three times superior to that reached with the same loading of layered clay...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28432604/phosphate-imbalance-in-patients-with-heart-failure
#2
REVIEW
E C Christopoulou, T D Filippatos, E Megapanou, M S Elisaf, G Liamis
Patients with heart failure often exhibit electrolyte abnormalities, such as hyponatremia or hypokalemia/hyperkalemia. Although not as common as the other electrolyte disturbances observed in patients with heart failure, phosphate imbalance is also of high importance in this population. The aim of this review is to present the mechanisms of low or high phosphate serum levels in patients with heart failure and its role in the pathogenesis and progression of heart dysfunction. Hypophosphatemia in patients with heart failure may be the result of co-existing electrolyte and acid-base abnormalities, pharmacological treatments, decreased intestinal absorption or secondary to sympathetic nervous system activation and co-morbidities, such as diabetes mellitus or heavy alcohol consumption...
April 22, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28428773/mutation-at-g103-of-mtbftsz-altered-their-sensitivity-to-coumarins
#3
Duggirala Sridevi, Karpagam U Sudhakar, Ragamanvitha Ananthathatmula, Rakesh P Nankar, Mukesh Doble
Coumarins are natural polyphenol lactones comprising of fused rings of benzene and α-pyrone. The current study demonstrates the inhibitory effect of coumarins with various substitutions on Mycobacterium smegmatis mc(2) 155. We also demonstrate the effect of pomegranate (Punica granatum) extract containing ellagic acid, on M. smegmatis as well as their affect on MtbFtsZ (FtsZ from Mycobacterium tuberculosis). The ellagic acid extracts from pomegranate peels inhibit mycobacteria with a MIC of 25 μM and 0.3 to 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28420061/metabolic-profiling-reveals-new-serum-biomarkers-of-lupus-nephritis
#4
J Li, X-W Xie, H Zhou, B Wang, M-J Zhang, F-Y Tang
Metabolomics has been applied to explore altered metabolite profiles in disease and identify unique metabolic signatures specific to certain pathologies. The aim of the current study is to characterize the metabolic profile of patients diagnosed with lupus nephritis (LN) and explore new insights into underlying disease processes. A metabolomic approach using ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry (UPLC-HRMS) was developed in serum samples from 32 LN patients, 30 idiopathic nephrotic syndrome (INS) patients and 28 healthy controls (HCs)...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28416602/antigen-receptor-galaxy-a-user-friendly-web-based-tool-for-analysis-and-visualization-of-t-and-b-cell-receptor-repertoire-data
#5
Hanna IJspeert, Pauline A van Schouwenburg, David van Zessen, Ingrid Pico-Knijnenburg, Andrew P Stubbs, Mirjam van der Burg
Antigen Receptor Galaxy (ARGalaxy) is a Web-based tool for analyses and visualization of TCR and BCR sequencing data of 13 species. ARGalaxy consists of four parts: the demultiplex tool, the international ImMunoGeneTics information system (IMGT) concatenate tool, the immune repertoire pipeline, and the somatic hypermutation (SHM) and class switch recombination (CSR) pipeline. Together they allow the analysis of all different aspects of the immune repertoire. All pipelines can be run independently or combined, depending on the available data and the question of interest...
April 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28400405/nutritional-approaches-for-managing-obesity-associated-metabolic-diseases
#6
Rachel Botchlett, Shih-Lung Woo, Mengyang Liu, Ya Pei, Xin Guo, Honggui Li, Chaodong Wu
Obesity is an ongoing pandemic and serves as a causal factor of a wide spectrum of metabolic diseases including diabetes, fatty liver disease, and cardiovascular disease. Much evidence has demonstrated that nutrient overload initiates or exacerbates inflammatory responses in tissues/organs involved in the regulation of systemic metabolic homeostasis. This obesity-associated inflammation is usually at a low-grade and viewed as metabolic inflammation. When it exists continuously, inflammation inappropriately alters metabolic pathways and impairs insulin signaling cascades in peripheral tissues/organs such as adipose tissue, the liver and skeletal muscle, resulting in local fat deposition and insulin resistance and systemic metabolic dysregulation...
April 11, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28394931/a-flavone-polysaccharide-based-prescription-attenuates-the-mitochondrial-dysfunction-induced-by-duck-hepatitis-a-virus-type-1
#7
Hongxu Du, Jingjing Yang, Jingying Bai, Ke Ming, Jintong Shi, Fangke Yao, Wei Zhang, Yang Yu, Yun Chen, Wen Xiong, Yi Wu, Deyun Wang, Yuanliang Hu, Jiaguo Liu
The principal target organ of duck hepatitis A virus type 1 (DHAV-1) is duckling liver, which is an energy-intensive organ and plays important roles in body's energy metabolism and conversion. As the "power house" of the hepatocytes, mitochondria provide more than 90% of the energy. However, mitochondria are much vulnerable to the oxidative stress for their rich in polyunsaturated fatty acids. Although previous researches have demonstrated that DHAV-1 could induce the oxidative stress in the serum of the infected ducklings, no related study on the mitochondria during the pathological process of DVH has been reported by far...
2017: PloS One
https://www.readbyqxmd.com/read/28388481/membrane-lipid-profiles-of-coral-responded-to-zinc-oxide-nanoparticle-induced-perturbations-on-the-cellular-membrane
#8
Chuan-Ho Tang, Ching-Yu Lin, Shu-Hui Lee, Wei-Hsien Wang
Zinc oxide nanoparticles (nZnOs) released from popular sunscreens used during marine recreation apparently endanger corals; however, the known biological effects are very limited. Membrane lipids constitute the basic structural element to create cell a dynamic structure according to the circumstance. Nano-specific effects have been shown to mechanically perturb the physical state of the lipid membrane, and the cells accommodating the actions of nZnOs can be involved in the alteration of the membrane lipid composition...
March 31, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28387515/hydrogen-bond-donor-acceptor-cosolvent-modified-choline-chloride-based-deep-eutectic-solvents
#9
Ashish Pandey, Bhawna, Divya Dhingra, Siddharth Pandey
Deep eutectic solvents (DESs) have emerged as nontoxic and inexpensive alternatives not only to the common organic solvents but to the ionic liquids as well. Some of the common and popular, and perhaps the most investigated, DESs are the ones comprising an ammonium salt and an appropriate hydrogen bond (HB) donor in a predetermined mole ratio. The formation of the DES is attributed to the H-bonding interaction(s) present between the salt and the HB donor. Consequently, addition of a predominantly HB donor or a predominantly HB acceptor cosolvent to such DESs may result in intriguing features and properties...
April 7, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28380556/assessing-the-performance-of-floating-biofilters-for-oxidation-of-methane-from-dairy-effluent-ponds
#10
Rashad Syed, Surinder Saggar, Kevin Tate, Bernd H A Rehm, Peter Berben
Mitigating methane (CH) emissions from New Zealand dairy effluent ponds using volcanic pumice soil biofilters has been found to be a promising technology. Because the soil column biofilter prototype previously used was cumbersome, here we assess the effectiveness of volcanic pumice soil-perlite biofilter media in a floating system to remove high concentrations of CH emitted from a dairy effluent pond and simultaneously in a laboratory setting. We measured the CH removal over a period of 11 mo and determined methanotroph population dynamics using molecular techniques to understand the role of methanotroph population abundance and diversity in CH removal...
March 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28378831/carbon-dioxide-induced-plasticity-of-branchial-acid-base-pathways-in-an-estuarine-teleost
#11
Elizabeth B Allmon, Andrew J Esbaugh
Anthropogenic CO2 is expected to drive ocean pCO2 above 1,000 μatm by 2100 - inducing respiratory acidosis in fish that must be corrected through branchial ion transport. This study examined the time course and plasticity of branchial metabolic compensation in response to varying levels of CO2 in an estuarine fish, the red drum, which regularly encounters elevated CO2 and may therefore have intrinsic resilience. Under control conditions fish exhibited net base excretion; however, CO2 exposure resulted in a dose dependent increase in acid excretion during the initial 2 h...
April 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28376083/bovine-and-murine-models-highlight-novel-roles-for-slc25a46-in-mitochondrial-dynamics-and-metabolism-with-implications-for-human-and-animal-health
#12
Amandine Duchesne, Anne Vaiman, Johan Castille, Christian Beauvallet, Pauline Gaignard, Sandrine Floriot, Sabrina Rodriguez, Marthe Vilotte, Laurent Boulanger, Bruno Passet, Olivier Albaric, François Guillaume, Abdelhak Boukadiri, Laurence Richard, Maud Bertaud, Edouard Timsit, Raphaël Guatteo, Florence Jaffrézic, Pierre Calvel, Louise Helary, Rachid Mahla, Diane Esquerré, Christine Péchoux, Sophie Liuu, Jean-Michel Vallat, Didier Boichard, Abdelhamid Slama, Jean-Luc Vilotte
Neuropathies are neurodegenerative diseases affecting humans and other mammals. Many genetic causes have been identified so far, including mutations of genes encoding proteins involved in mitochondrial dynamics. Recently, the "Turning calves syndrome", a novel sensorimotor polyneuropathy was described in the French Rouge-des-Prés cattle breed. In the present study, we determined that this hereditary disease resulted from a single nucleotide substitution in SLC25A46, a gene encoding a protein of the mitochondrial carrier family...
April 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28351018/profiles-of-amino-acids-and-biogenic-amines-in-the-plasma-of-cri-du-chat-patients
#13
Danielle Zildeana Sousa Furtado, Fernando Brunale Vilela de Moura Leite, Cleber Nunes Barreto, Bernadete Faria, Leticia Dias Lima Jedlicka, Elisângela de Jesus Silva, Heron Dominguez Torres da Silva, Etelvino Jose Henriques Bechara, Nilson Antonio Assunção
Cri-du-chat syndrome (CDCS) is a rare innate disease attributed to chromosome 5p deletion characterized by a cat-like cry, craniofacial malformation, and altered behavior of affected children. Metabolomic analysis and a chemometric approach allow description of the metabolic profile of CDCS as compared to normal subjects. In the present work, UHPLC/MS was employed to analyze blood samples withdrawn from CDCS carriers (n=18) and normal parental subjects (n=18), all aged 0-34 years, aiming to set up a representative CDCS profile constructed from 33 targeted amino acids and biogenic amines...
March 21, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28342863/disturbed-tryptophan-metabolism-correlating-to-progression-and-metastasis-of-esophageal-squamous-cell-carcinoma
#14
Jing Cheng, Hai Jin, Xiaobei Hou, Jie Lv, Xianfu Gao, Guangyong Zheng
Esophageal squamous cell carcinoma (ESCC) is one of the most frequent malignancies worldwide. Lymph node metastasis is the leading cause of death in ESCC patients. To identify early diagnostic and prognostic biomarkers of ESCC and elucidate underlying pathogenesis of the disease, a targeted metabolomics strategy based on liquid chromatography combined with tandem mass spectrometry was applied to explore tryptophan metabolism between ESCC patients, metastatic ESCC patients (mESCC), and healthy controls. Statistical analysis on metabolite expression abundance and compound concentration ratio was conducted to discriminate patients from healthy controls...
March 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28323073/dietary-electrolyte-balance-affects-growth-performance-amylase-activity-and-metabolic-response-in-the-meagre-argyrosomus-regius
#15
Leonardo J Magnoni, Emilio Salas-Leiton, Maria-João Peixoto, Luis Pereira, Francisca Silva-Brito, Filipa Fontinha, José F M Gonçalves, Jonathan M Wilson, Johan W Schrama, Rodrigo O A Ozório
Dietary ion content is known to alter the acid-base balance in freshwater fish. The current study investigated the metabolic impact of acid-base disturbances produced by differences in dietary electrolyte balance (DEB) in the meagre (Argyrosomus regius), an euryhaline species. Changes in fish performance, gastric chyme characteristics, pH and ion concentrations in the bloodstream, digestive enzyme activities and metabolic rates were analyzed in meagre fed ad libitum two experimental diets (DEB 200 or DEB 700mEq/kg) differing in the Na2CO3 content for 69days...
March 16, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28322687/correction-altered-mental-status-and-an-acid-base-disturbance
#16
Shylaja Mani, Gregory W Rutecki
In the article "A patient with altered mental status and an acid-base disturbance" (Mani S, Rutecki GW, Cleve Clin J Med 2017; 84:27-34), 2 errors occurred in Table 2. The corrected table appears with corrections shown in red. In addition, two sentences in the text regarding the osmol gap should be revised as follows: On page 31, the last 3 lines should read as follows: "When the anion gap metabolic acidosis is multifactorial, as it was suspected to be in a case reported by Tan et al,(23) the osmol gap may be elevated as a consequence of additional toxic ingestions, as it was in the reported patient...
March 2017: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/28318362/carbonic-anhydrase-inhibitors-modify-intracellular-ph-transients-and-contractions-of-rat-middle-cerebral-arteries-during-co2-hco3-fluctuations
#17
Jacob K Rasmussen, Ebbe Boedtkjer
The CO2/HCO3(-) buffer minimizes pH changes in response to acid-base loads, HCO3(-) provides substrate for Na(+),HCO3(-)-cotransporters and Cl(-)/HCO3(-)-exchangers, and H(+) and HCO3(-) modify vasomotor responses during acid-base disturbances. We show here that rat middle cerebral arteries express cytosolic, mitochondrial, extracellular, and secreted carbonic anhydrase isoforms that catalyze equilibration of the CO2/HCO3(-) buffer. Switching from CO2/HCO3(-)-free to CO2/HCO3(-)-containing extracellular solution results in initial intracellular acidification due to hydration of CO2 followed by gradual alkalinization due to cellular HCO3(-) uptake...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28293905/hyperphenylalaninemia-correlated-with-global-decrease-of-antioxidant-genes-expression-in-white-blood-cells-of-adult-patients-with-phenylketonuria
#18
Charlotte Veyrat-Durebex, Christelle Debeissat, Hélène Blasco, Franck Patin, Hélène Henique, Patrick Emond, Catherine Antar, Valérie Gissot, Olivier Herault, François Maillot
BACKGROUND: Several studies have highlighted disturbance of redox homeostasis in patients with phenylketonuria (PKU) which may be associated with neurological disorders observed in patients, especially during adulthood when phenylalanine restrictive diets are not maintained. The aim of this study was to assess the antioxidant profile in a cohort of PKU patients in comparison to the controls and to evaluate its relation to biochemical parameters especially phenylalaninemia. METHODS: We measured RNA expression of 22 antioxidant genes and reactive oxygen species (ROS) levels in white blood cells of 10 PKU patients and 10 age- and gender-matched controls...
March 15, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28289910/acid-base-disturbances-in-nephrotic-syndrome-analysis-using-the-co2-hco3-method-traditional-boston-model-and-the-physicochemical-method-stewart-model
#19
Tomomichi Kasagi, Hirokazu Imai, Naoto Miura, Keisuke Suzuki, Masabumi Yoshino, Hironobu Nobata, Takuhito Nagai, Shogo Banno
BACKGROUND: The Stewart model for analyzing acid-base disturbances emphasizes serum albumin levels, which are ignored in the traditional Boston model. We compared data derived using the Stewart model to those using the Boston model in patients with nephrotic syndrome. METHODS: Twenty-nine patients with nephrotic syndrome and six patients without urinary protein or acid-base disturbances provided blood and urine samples for analysis that included routine biochemical and arterial blood gas tests, plasma renin activity, and aldosterone...
March 13, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28286957/combined-clinical-phenotype-and-lipidomic-analysis-reveals-the-impact-of-chronic-kidney-disease-on-lipid-metabolism
#20
Hua Chen, Lin Chen, Dan Liu, Dan-Qian Chen, Nosratola D Vaziri, Xiao-Yong Yu, Li Zhang, Wei Su, Xu Bai, Ying-Yong Zhao
Chronic kidney disease (CKD) results in significant dyslipidemia and profound changes in lipid and lipoprotein metabolism. The associated dyslipidemia, in turn, contributes to progression of CKD and its cardiovascular complications. To gain an in-depth insight into the disorders of lipid metabolism in advanced CKD, we applied UPLC-HDMS-based lipidomics to measure serum lipid metabolites in 180 patients with advanced CKD and 120 age-matched healthy controls. We found significant increases in the levels of total free fatty acids, glycerolipids, and glycerophospholipids in patients with CKD...
March 27, 2017: Journal of Proteome Research
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