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https://www.readbyqxmd.com/read/28190443/neurologic-manifestations-of-major-electrolyte-abnormalities
#1
M Diringer
The brain operates in an extraordinarily intricate environment which demands precise regulation of electrolytes. Tight control over their concentrations and gradients across cellular compartments is essential and when these relationships are disturbed neurologic manifestations may develop. Perturbations of sodium are the electrolyte disturbances that most often lead to neurologic manifestations. Alterations in extracellular fluid sodium concentrations produce water shifts that lead to brain swelling or shrinkage...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28177094/-analysis-of-the-parameters-traditional-or-not-for-the-evaluation-of-the-metabolic-acidosis
#2
Caterina Urso, Salvatore Brucculeri, Caterina Carollo, Gregorio Caimi
Despite huge progress in acidbase knowledge, several confusing, irrational and controversial issues still remain. Acid-base disturbances have been usually evaluated with the traditional Henderson-Hasselbach method and with BE evaluation that seem inadequate since they define the magnitude of metabolic acidosis rather than its cause. Some studies have shown that the traditional approach is often not able to highlight the complicated acid-base disorders in critically ill patients; in these subjects, the possibility to identify tissue acids could offer a greater prognostic value than the evaluation of traditional parameters...
January 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28152273/effects-of-tissue-digestion-solutions-on-surface-properties-of-nitinol-stents
#3
Stacey J L Sullivan, Philip Stafford, Elon Malkin, Maureen L Dreher, Srinidhi Nagaraja
Analysis of explanted medical implants can provide a wealth of knowledge about device safety and performance. However, the quality of information may be compromised if the methods used to clean tissue from the device disturb the retrieved condition. Common solutions used to digest tissue may adversely affect the surface of the device and its severity can be material and processing dependent. In this study, two groups of stents made from the same material (Nitinol) were shape set in a salt pot (SP) or further processed by mechanical polishing (MP) and then immersed in one of three tissue digestion solutions (TDS): nitric acid (HNO3 ), sodium hydroxide (NaOH), or papain enzyme (papain)...
February 2, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28149031/thoughts-on-the-current-management-of-acute-aluminum-phosphide-toxicity-and-proposals-for-therapy-an-evidence-based-review
#4
REVIEW
Maryam Vasheghani Farahani, Davood Soroosh, Sayed Mahdi Marashi
The majority of aluminum phosphide (ALP) toxicity cases are suicidal attempts. Despite advances in critical care medicine, the mortality rate of ALP remains very high. Unfortunately, knowledge on the toxicokinetics of ALP is very low. An obsolete idea was proposed that inhibition of complex IV of cytochrome C oxidase is responsible for multiorgan dysfunction. However, based on human studies, this effect might be insignificant. Thus, a novel idea proposes that the main mechanism might be vascular wall integrity disruption...
December 2016: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28107909/trapping-magnetic-nanoparticles-for-in-line-capillary-electrophoresis-in-a-liquid-based-capillary-coolant-system
#5
Pranov Ramana, Erwin Adams, Patrick Augustijns, Ann Van Schepdael
A method to trap magnetic nanoparticles inside the electrophoretic capillary has been developed without disabling and disturbing the coolant liquid recirculation. The complete optimization from setting up of the external magnetic field to injecting the magnetic nanoparticles in order to facilitate efficient trapping is described. In addition to this, the setup has been tested with 150mM sodium phosphate buffer as the background electrolyte at different pH values (2, 4, 6 and 8). All these pH values have been investigated at 25°C and 37°C to mimic room temperature and physiological temperature, respectively...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28105926/the-gene-expression-profile-of-renal-medulla-in-isiah-rats-with-inherited-stress-induced-arterial-hypertension
#6
Marina A Ryazanova, Larisa A Fedoseeva, Nikita I Ershov, Vadim M Efimov, Arcady L Markel, Olga E Redina
BACKGROUND: The changes in the renal function leading to a reduction of medullary blood flow can have a great impact on sodium and water homeostasis and on the long-term control of arterial blood pressure. The RNA-Seq approach was used for transcriptome profiling of the renal medulla from hypertensive ISIAH and normotensive WAG rats to uncover the genetic basis of the changes underlying the renal medulla function in the ISIAH rats being a model of the stress-sensitive arterial hypertension and to reveal the genes which possibly may contribute to the alterations in medullary blood flow...
December 22, 2016: BMC Genetics
https://www.readbyqxmd.com/read/28073790/clemizole-and-modulators-of-serotonin-signalling-suppress-seizures-in-dravet-syndrome
#7
Aliesha Griffin, Kyla R Hamling, Kelly Knupp, SoonGweon Hong, Luke P Lee, Scott C Baraban
Dravet syndrome is a catastrophic childhood epilepsy with early-onset seizures, delayed language and motor development, sleep disturbances, anxiety-like behaviour, severe cognitive deficit and an increased risk of fatality. It is primarily caused by de novo mutations of the SCN1A gene encoding a neuronal voltage-activated sodium channel. Zebrafish with a mutation in the SCN1A homologue recapitulate spontaneous seizure activity and mimic the convulsive behavioural movements observed in Dravet syndrome. Here, we show that phenotypic screening of drug libraries in zebrafish scn1 mutants rapidly and successfully identifies new therapeutics...
January 10, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28065573/rapid-evolution-of-tolerance-to-road-salt-in-zooplankton
#8
Kayla D Coldsnow, Brian M Mattes, William D Hintz, Rick A Relyea
Organisms around the globe are experiencing novel environments created by human activities. One such disturbance of growing concern is the salinization of freshwater habitats from the application of road deicing salts, which creates salinity levels not experienced within the recent evolutionary history of most freshwater organisms. Moreover, salinization can induce trophic cascades and alter the structure of freshwater communities, but knowledge is still scarce about the ability of freshwater organisms to adapt to elevated salinity...
March 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28064417/the-mmp-9-timp-1-system-is-involved-in-fluoride-induced-reproductive-dysfunctions-in-female-mice
#9
Hong-Wei Wang, Wen-Peng Zhao, Pan-Pan Tan, Jing Liu, Jing Zhao, Bian-Hua Zhou
A total of 84 healthy female mice were kept with various concentrations of sodium fluoride (F) (0, 50, 100, 150 mg F(-)/L in drinking water for 90 days) and were then mated with healthy male mice for 1 week to study the effect of excessive fluoride on female reproductive function, particularly in embryo implantation. The rate of pregnancy, litter size, and the birth weight of female mice were evaluated. Ultrastructural changes of uteri tissues were observed by transmission electron microscopy (TEM). The mRNA expression levels of MMP-9 and TIMP-1 were determined by quantitative real-time PCR...
January 7, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28060134/severe-hyponatremia-in-a-single-center-series-of-84-homogenously-treated-children-with-acute-lymphoblastic-leukemia
#10
Szymon Janczar, Beata Zalewska-Szewczyk, Wojciech Mlynarski
Electrolyte abnormalities are hallmark metabolic disturbances during the treatment of acute lymphoblastic leukemia (ALL). Hyponatremia is an ominous laboratory sign in the setting of neoplasia. We analyzed the incidence, risk factors, associations, specific interventions and outcomes of severe hyponatremia in a single-center series of children with ALL. The incidence of severe hyponatremia, defined as serum sodium levels below 130 mmol/L on at least 2 of 3 consecutive days, was 11.9%. History of hyponatremia episode is associated with neurologic complications (P=0...
March 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28057513/enterolobium-contortisiliquum-is-a-cause-of-acute-ruminal-acidosis-in-sheep
#11
Rayane C Pupin, Paula V Leal, Stephanie C Lima, Gleice Kelli A Melo, Arnildo Pott, Marcelo A Araújo, Claudio S L Barros, Ricardo A A Lemos
The ingestion of pods of Enterolobium contortisiliquum is associated with digestive disturbances, photosensitivity and abortion in domestic ruminants. This experiment was designed to test the hypothesis that digestive disturbances in this toxicosis are really caused by acute ruminal acidosis. Three sheep fed large doses (10-15 g/kg/body weight [bw]) of E. contortisiliquum pods developed ruminal acidosis and were treated with sodium bicarbonate to try to control this metabolic disturbance, thus providing additional evidence of the involvement of ruminal acidosis in the pathogenesis of toxicosis...
January 3, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28056649/taste-quality-confusions-influences-of-age-smoking-ptc-taster-status-and-other-subject-characteristics
#12
Richard L Doty, Jonathan H Chen, Jane Overend
Many persons misidentify the quality of taste stimuli, a phenomenon termed "taste confusion." In this study of 1000 persons, we examined the influences of age, sex, causes of chemosensory disturbances, and genetically determined phenylthiocarbamide (PTC) taster status on taste quality confusions for four tastants (sucrose, citric acid, sodium chloride, caffeine). Overall, sour-bitter confusions were most common (19.3%), followed by bitter-sour (11.4%), salty-bitter (7.3%), salty-sour (7.0%), bitter-salty (3...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28054989/effects-of-long-term-in-vivo-exposure-to-di-2-ethylhexylphthalate-on-thyroid-hormones-and-the-tsh-tshr-signaling-pathways-in-wistar-rats
#13
Xinwen Dong, Jin Dong, Yue Zhao, Jipeng Guo, Zhanju Wang, Mingqi Liu, Yunbo Zhang, Xiaolin Na
Di-(2-ethylhexyl)phthalate (DEHP) was a widely used chemical with human toxicity. Recent in vivo and in vitro studies suggested that DEHP-exposure may be associated with altered serum thyroid hormones (THs) levels, but the underlying molecular mechanisms were largely unknown. To explore the possible molecular mechanisms, 128 Wistar rats were dosed with DEHP by gavage at 0, 150, 300, and 600 mg/kg/day for 3 months (M) and 6 M, respectively. After exposure, expression of genes and proteins in the thyroid, pituitary, and hypothalamus tissues of rats were analyzed by Q-PCR and western blot, while the sera and urine samples were assayed by radioimmunoassay and ELISA...
January 4, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28035957/in-vivo-assessment-of-clobetasol-propionate-loaded-lecithin-chitosan-nanoparticles-for-skin-delivery
#14
Taner Şenyiğit, Fabio Sonvico, Alessandra Rossi, Işıl Tekmen, Patrizia Santi, Paolo Colombo, Sara Nicoli, Özgen Özer
The aim of this work was to assess in vivo the anti-inflammatory efficacy and tolerability of clobetasol propionate (CP) loaded lecithin/chitosan nanoparticles incorporated into chitosan gel for topical application (CP 0.005%). As a comparison, a commercial cream (CP 0.05% w/w), and a sodium deoxycholate gel (CP 0.05% w/w) were also evaluated. Lecithin/chitosan nanoparticles were prepared by self-assembling of the components obtained by direct injection of soybean lecithin alcoholic solution containing CP into chitosan aqueous solution...
December 26, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28009309/-modern-approaches-to-correction-of-hypernatremia-in-neurosurgical-patients
#15
D Vassilyev
The article presents the analysis of the intensive therapy through the correction of persistent hypernatremia in neurosurgical patients after removal of brain tumors. The aim of this work was to evaluate the effectiveness of Sterofundin in the framework of complex therapy of hypernatremia in neurosurgical patients after removal of brain tumors. We analyzed the dynamics of the concentrations of sodium, potassium, chorus of the plasma, anion gap and buffer bases in the postoperative period of these patients. For obtaining reliable results, the patients were divided into groups according to the nature of the treatment: Sterofundin and symptomatic correction of hypotonic solution of sodium chloride, saluretic and Verospiron respectively...
November 2016: Georgian Medical News
https://www.readbyqxmd.com/read/27990831/-clinical-evaluation-of-acid-base-status-henderson-hasselbalch-or-stewart-fencl-approach
#16
Karel Matoušovic, Jan Havlín, Otto Schück
Two approaches have been used in clinical evaluation the acid-base status: traditional (bicarbonate-centered) is based on the Henderson-Hasselbalch equation complemented by calculation of the anion gap, and more recent quantitative approach proposed by Stewart and Fencl. The latter method defines the three independent variables, which regulate pH. These include: the difference between the sum of charges carried by strong plasma cations and anions termed the strong ion difference - SID (decrease causes acidosis, and vice versa); the total concentration of the weak non-volatile acids [Atot] (inorganic phosphate and albumin, decrease causes alkalosis and vice versa), and pCO2...
2016: Casopís Lékar̆ů C̆eských
https://www.readbyqxmd.com/read/27989950/plastic-changes-along-auditory-pathway-during-salicylate-induced-ototoxicity-hyperactivity-and-cf-shifts
#17
Chen Jiang, Bin Luo, Senthilvelan Manohar, Guang-Di Chen, Richard Salvi
High dose of salicylate, the active ingredient in aspirin, has long been known to induce transient hearing loss, tinnitus and hyperacusis making it a powerful experimental tool. These salicylate-induced perceptual disturbances are associated with a massive reduction in the neural output of the cochlea. Paradoxically, the diminished neural output of the cochlea is accompanied by a dramatic increase in sound-evoked activity in the auditory cortex (AC) and several other parts of the central nervous system. Exactly where the increase in neural activity begins and builds up along the central auditory pathway are not fully understood...
October 27, 2016: Hearing Research
https://www.readbyqxmd.com/read/27989333/inherited-pain-syndromes-and-ion-channels
#18
REVIEW
Francis J DiMario
Individuals rely on the perception of pain to avoid injury, to signal disease, and to warn about tissue inflammation and damage. However, the inheritance of inappropriate, extreme, or inadequate pain production is a source of significant human suffering. Substantial progress has been made in our understanding of the genetics and pathophysiology of pain through the study of individuals and families with several specific inherited pain syndromes. These studies have led to the discovery of a number of gene mutations associated with specific ion channel disturbances that produce familial inherited pain sensitivity and insensitivity syndromes...
August 2016: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/27981578/bicarbonate-sensing-in-mouse-cortical-astrocytes-during-extracellular-acid-base-disturbances
#19
Shefeeq M Theparambil, Zinnia Naoshin, Sabrina Defren, Jana Schmaelzle, Tobias Weber, Hans-Peter Schneider, Joachim W Deitmer
KEY POINTS: The present study suggests that the electrogenic sodium-bicarbonate cotransporter, NBCe1, supported by carbonic anhydrase II, CAII, provides an efficient mechanism of bicarbonate sensing in cortical astrocytes. This mechanism is proposed to play a major role in setting the pHi responses to extracellular acid/base challenges in astrocytes. A decrease in extracellular [HCO3(-) ] during isocapnic acidosis and isohydric hypocapnia, or an increase in intracellular [HCO3(-) ] during hypercapnic acidosis, was effectively sensed by NBCe1, which carried bicarbonate out of the cells under these conditions, and caused an acidification and sodium fall in WT astrocytes, but not in NBCe1-knockout astrocytes...
December 16, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27980288/a-case-of-central-pontine-and-extrapontine-myelinolysis-after-surgery-for-a-pituitary-tumor
#20
Takanobu Ishiguro, Tomohiko Ishihara, Yuya Hatano, Takahiro Abe, Takayoshi Shimohata, Masatoyo Nishizawa
A 21-year-old woman underwent surgery for a pituitary tumor. On the 11th postoperative day, blood examination revealed severe hyponatremia, with a serum sodium level of 111 mEq/l, and two days later this increased rapidly to 137 mEq/l. On the 20th postoperative day, the patient developed dysarthria and gait disturbance. Head MRI on the 30th postoperative day demonstrated intense high-signal lesions in the pons and bilateral corpus striatum on FLAIR and DWI, and central pontine and extrapontine myelinolysis was diagnosed...
December 16, 2016: Rinshō Shinkeigaku, Clinical Neurology
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