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Effective osmolarity

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https://www.readbyqxmd.com/read/29458112/compatible-osmolytes-modulate-mitochondrial-function-in-a-marine-osmoconformer-crassostrea-gigas-thunberg-1793
#1
Eugene P Sokolov, Inna M Sokolova
Salinity is an important environmental factor affecting physiology of marine organisms. Osmoconformers such as marine mollusks maintain metabolic function despite changes of the osmolarity and composition of the cytosol during salinity shifts. Currently, metabolic responses to the salinity-induced changes of the intracellular milieu are not well understood. We studied the effects of osmolarity (450 vs. 900 mOsm) and compatible osmolytes (70-590 mM of taurine or betaine) on isolated gill mitochondria of a marine osmoconformer, the Pacific oyster Crassostrea gigas...
February 16, 2018: Mitochondrion
https://www.readbyqxmd.com/read/29457534/comparing-hydrogels-for-human-nucleus-pulposus-cell-regeneration-role-of-osmolarity-during-expansion
#2
Anita Krouwels, Ferry Melchels, Mattie H P Van Rijen, F Cumhur Oner, Wouter Dhert, M Tryfonidou, Laura Creemers
Hydrogels can facilitate nucleus pulposus regeneration, either for clinical application or research into mechanisms of regeneration. However, many different hydrogels and culture conditions for human degenerated nucleus pulposus (NP) have been employed, making literature data difficult to compare. Therefore, we compared six different hydrogels of natural polymers and investigated the role of serum in the medium and of osmolarity during expansion or redifferentation in an attempt to provide comparators for future studies...
February 17, 2018: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/29457271/does-the-temperature-of-an-artificial-tear-affect-its-comfort
#3
Etty Bitton, Vanessa Crncich, Noemie Brunet
BACKGROUND: Refrigerated eye-drops have been advocated in cases of ocular allergies to provide a soothing effect upon instillation. This notion continues to be promoted by practitioners for artificial tears (AT) in the management of dry eye (DE) with little support in the literature. To further substantiate claims of a soothing effect of cold eye-drops, the aim of this study was to determine if refrigeration of an AT enhanced the subjective comfort upon instillation. METHODS: Participants with mild to moderate DE participated in an open label contralateral study of two weeks duration...
February 18, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29456121/establishment-of-colonic-dialysis-model-in-uremic-rats-by-right-nephrectomy-and-left-partial-nephrectomy
#4
Abdol-Mohammad Kajbafzadeh, Nastaran Sabetkish, Shabnam Sabetkish
BACKGROUND: Conventional treatments for patients suffering with end-stage renal disease (ESRD) has several disadvantages, highlighting the importance of other reproducible modalities such as colonic dialysis (CD). OBJECTIVES: The aim was to establish a CD model in uremic rats and evaluate the effect of two different peritoneal dialysis (PD) solutions. METHODS: Thirty-two male Wistar rats were randomly divided into four groups. After right nephrectomy and left partial nephrectomy, a Malone antegrade continence enema (MACE) stoma was created...
February 7, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29452970/effect-of-tear-supplements-on-signs-symptoms-and-inflammatory-markers-in-dry-eye
#5
Eilidh Martin, Katherine M Oliver, E Ian Pearce, Alan Tomlinson, Peter Simmons, Suzanne Hagan
PURPOSE: Three tear supplements were compared for their effects on the signs, symptoms and inflammatory status of subjects with dry eye disease. Assessments were made before and after both 2 and 4 weeks of treatment. METHODS: In this masked, randomized, 3-way crossover trial, eighteen dry eye subjects were recruited. At each visit, symptoms, tear evaporation rate, stability and osmolarity were measured and tear samples were analyzed for 7 inflammatory markers, using multiplex immunoassays...
February 13, 2018: Cytokine
https://www.readbyqxmd.com/read/29452185/an-injectable-chitosan-chondroitin-sulfate-hydrogel-with-tunable-mechanical-properties-for-cell-therapy-tissue-engineering
#6
Yasaman Alinejad, Atma Adoungotchodo, Eve Hui, Fatemeh Zehtabi, Sophie Lerouge
Chitosan (CH) hydrogels with remarkable mechanical properties and rapid gelation rate were recently synthesized by combining sodium hydrogen carbonate (SHC) with another weak base, such as beta-glycerophosphate (BGP). To improve their biological responses, in the present study, chondroitin sulfate (CS) was added to these CH hydrogels. Hydrogel characteristics in terms of pH and osmolarity as well as rheological, mechanical, morphological and swelling properties were studied in the absence and presence of CS...
February 13, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29408241/major-adverse-renal-and-cardiac-events-following-coronary-angiography-and-cardiac-surgery
#7
Kristen M Tecson, David Brown, James W Choi, Georges Feghali, Gonzalo V Gonzalez-Stawinski, Baron L Hamman, Robert Hebeler, Stuart R Lander, Brian Lima, Srini Potluri, Jeffrey M Schussler, Robert C Stoler, Carlos Velasco, Peter A McCullough
BACKGROUND: Patients at high risk for developing post-procedural complications may receive iodixanol, an iso-osmolar contrast, during coronary angiography to minimize the risk of renal toxicity. For those who additionally require cardiac surgery, the wait-time between angiography and surgery may be a modifiable factor capable of mitigating poor surgical outcomes; however, there have been inconsistsent reports regarding the optimal wait-time. We sought to determine the effects of wait time between angiogram and cardiac surgery, as well as contrast induced acute injury (CI-AKI) on the development of major adverse renal and cardiac events (MARCE)...
February 2, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29388864/the-effect-of-low-dose-aspirin-on-dry-eye-parameters-and-ocular-surface-disease-index-questionnaire
#8
Alper Yazıcı, Esin Sarı, Erkan Ayhan, Gözde Şahin, Nesime Setge Tıskaoğlu, Taha Gürbüzer, Hüseyin Kurt, Sıtkı Samet Ermiş
PURPOSE: To evaluate the effects of acetylsalicylic acid (aspirin) on tear film parameters and dry eye disease. METHODS: Fifty-seven patients using low-dose aspirin regularly for antiaggregant purposes as well as 49 controls, who required antiaggregant treatment but who had not yet started, were included in the study. Tear osmolarity, tear break-up time (TBUT), Schirmer and Oxford grading of ocular surface staining were performed on all patients and dry eye symptomatology was assessed using the ocular surface disease index questionnaire (OSDI)...
February 1, 2018: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29349645/the-incidence-and-the-prognostic-impact-of-acute-kidney-injury-in-acute-myocardial-infarction-patients-current-preventive-strategies
#9
Evangelos Kaltsas, George Chalikias, Dimitrios Tziakas
Acute kidney injury (AKI) is one of the most common complications during hospitalization in various clinical settings. The goal of this review was to assess the incidence of AKI in acute myocardial infarction patients (AMI), how this incidence is affected by the diverse definitions, and if there is variability in the reported rates over recent years. Additionally, we sought to appraise the impact of AKI on short- and long-term prognosis of these patients. Finally, we report on the current preventive measures as they are suggested in the current guidelines of various societies, we comment on the evidence that support them, and we review the literature for other proposed therapeutic strategies, which either failed to prove their efficacy or they are not adequately confirmed yet...
January 19, 2018: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/29341965/osmotic-shifts-cerebral-edema-and-neurologic-deterioration-in-severe-hepatic-encephalopathy
#10
Eric Michael Liotta, Anna L Romanova, Bryan D Lizza, Laura J Rasmussen-Torvik, Minjee Kim, Brandon Francis, Rajbeer Singh Sangha, Timothy J Carroll, Daniel Ganger, Daniela P Ladner, Andrew M Naidech, James J Paparello, Shyam Prabhakaran, Farzaneh A Sorond, Matthew B Maas
OBJECTIVES: We sought to determine the effect of acute electrolyte and osmolar shifts on brain volume and neurologic function in patients with liver failure and severe hepatic encephalopathy. DESIGN: Retrospective analysis of brain CT scans and clinical data. SETTING: Tertiary care hospital ICUs. PATIENTS: Patients with acute or acute-on-chronic liver failure and severe hepatic encephalopathy. INTERVENTIONS: Clinically indicated CT scans and serum laboratory studies...
February 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29341028/ameliorative-effects-of-zataria-multiflora-hydro-alcoholic-extract-on-gentamicin-induced-nephrotoxicity-in-rats
#11
Saeed Hajihashemi, Tahereh Jafarian, Mahboubeh Ahmadi, Ali Rahbari, Fatemeh Ghanbari
BACKGROUND: Nephrotoxicity is the major side effects of aminoglycoside antibiotics such as gentamicin. The aim of this study was to investigate the therapeutic effects of Z.multiflora (ZM) hydroalcoholic extract on gentamicin-induced nephrotoxicity. METHODS: Twenty-eight male Wistar rats categorized into four groups: 1) the control group without injection, 2) the gentamicin treated group (100 mg/kg, i.p) 3) the gentamicin and Z. Multiflora treated group; Z. Multiflora extract(0...
January 16, 2018: Drug Research
https://www.readbyqxmd.com/read/29322584/effects-of-fixation-on-electrophysiology-and-structure-of-human-jejunal-villi
#12
Anna Casselbrant, Herbert F Helander
The villi of human jejunum vary in size and shape during different functional conditions. In the base the lamina propria is isotonic with blood, in the tip hyperosmotic. Here we study electrophysiological and morphological effects of incubation in hypotonic, isotonic, or hypertonic solutions, and to test various isotonic fixatives for microscopy. Samples of jejunal mucosae, obtained during surgery in obese patients, were studied in Ussing chambers where electrical parameters were registered during incubation in Krebs solution at various osmolarities, and during fixation in formaldehyde, glutaraldehyde, or osmium tetroxide (OsO4 )...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29316923/comparative-assessment-of-probiotics-and-monensin-in-the-prophylaxis-of-acute-ruminal-lactic-acidosis-in-sheep
#13
Leonardo Frasson Reis, Rejane Santos Sousa, Francisco Leonardo Costa Oliveira, Frederico Augusto Mazzocca Lopes Rodrigues, Carolina Akiko Sato Cabral Araújo, Enoch Brandão Souza Meira-Júnior, Raimundo Alves Barrêto-Júnior, Clara Satsuki Mori, Antonio Humberto Hamad Minervino, Enrico Lippi Ortolani
BACKGROUND: Acute ruminal lactic acidosis (ARLA) is a major nutritional and metabolic disorder usually characterized by excessive or non-adapted intake of diets rich in nonstructural carbohydrates. Feed additives that regulate the ruminal environment have been used to prevent ARLA, such as ionophores and, more recently, yeast culture. Thus, we aimed to compare the efficacy of a yeast-based culture (Saccharomyces cerevisiae) with that of monensin sodium in the prevention of ARLA in sheep...
January 9, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29277067/biochemical-composition-of-fetal-fluids-in-at-term-normal-developed-healthy-viable-dogs-and-preliminary-data-from-pathologic-littermates
#14
M C Veronesi, B Bolis, M Faustini, A Rota, A Mollo
A proper canine neonatal assistance, required to reduce the high perinatal loss rate, imply a full knowledge about the fetal-to-neonatal physiology. Because fetal fluids play an important role throughout mammals pregnancy, influencing fetal growth and development, fetal well being, and contributing to guarantee the most suitable environment for the fetus, the knowledge about fetal fluids biochemical composition is of major importance. At first, the biochemical composition of fetal fluids collected by normal developed, healthy and viable newborns, is necessary to depict the normal features, and represent the first step for the further detection of abnormalities associated to fetal/neonatal distress and useful for the early identification of newborns needing special attention, immediately after birth...
December 14, 2017: Theriogenology
https://www.readbyqxmd.com/read/29246497/improved-in-vitro-corneal-delivery-of-a-thrombospondin-1-derived-peptide-using-a-liposomal-formulation
#15
Laura Soriano-Romaní, Jesús Álvarez-Trabado, Antonio López-García, Irene Molina-Martínez, Rocío Herrero-Vanrell, Yolanda Diebold
Peptide delivery to and through ocular sites is a growing field of research interest. However, several barriers restrict the permeation and bioavailability of these molecules to target tissues. The main pharmacological barriers of topical administration are the tear film, rapid drainage of the tear film, and poor corneal permeation. If the administered molecule is a peptide, instability and enzymatic degradation can be significant. Novel approaches such as the design and development of nanocarriers to overcome these drawbacks have been investigated with promising results...
December 12, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29226736/the-effect-of-major-adverse-renal-cardiovascular-event-marce-incidence-procedure-volume-and-unit-cost-on-the-hospital-savings-resulting-from-contrast-media-use-in-inpatient-angioplasty
#16
Eric Keuffel, Peter A McCullough, Thomas M Todoran, Emmanouil S Brilakis, Swetha R Palli, Michael P Ryan, Candace Gunnarsson
OBJECTIVE: Determine the net economic impact of switching from low-osmolar contrast media (LOCM) to iso-osmolar contrast media (IOCM; iodixanol) in patients undergoing inpatient coronary or peripheral angioplasty in the United States (US). METHODS: A budget impact model (BIM) was developed from a hospital perspective. Nationally representative procedural and contrast media prevalence rates, along with MARCE (major adverse renal cardiovascular event) incidence and episode-related cost data were derived from Premier Hospital Data (October 2014 to September 2015)...
December 11, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/29223651/effects-of-the-rigid-gas-permeable-contact-lense-use-on-tear-and-ocular-surface-among-keratoconus-patients
#17
Cansu Yuksel Elgin, Guzin Iskeleli, Ovgu Aydin
PURPOSE: To investigate changes in tear and ocular surface of patients with keratoconus using rigid gas permeable contact lenses (RGPCL) and compare them against keratoconus patients who were not using lenses as well as a control group of healthy subjects. METHODS: 24 keratoconus patients using RGPCL (Group 1) 22 patients who were not using lenses (Group 3) and 21 healthy subjects (Group 3) were included in the study. Subjective complaints about the subjects' eyes have been investigated using the ocular-surface disease index (OSDI)...
December 6, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29215563/response-of-ustilago-maydis-against-the-stress-caused-by-three-polycationic-chitin-derivatives
#18
Dario Rafael Olicón-Hernández, Cristina Uribe-Alvarez, Salvador Uribe-Carvajal, Juan Pablo Pardo, Guadalupe Guerra-Sánchez
Chitosan is a stressing molecule that affects the cells walls and plasma membrane of fungi. For chitosan derivatives, the action mode is not clear. In this work, we used the yeast Ustilago maydis to study the effects of these molecules on the plasma membrane, focusing on physiologic and stress responses to chitosan (CH), oligochitosan (OCH), and glycol-chitosan (GCH). Yeasts were cultured with each of these molecules at 1 mg·mL-1 in minimal medium. To compare plasma membrane damage, cells were cultivated in isosmolar medium...
December 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29215176/protective-role-of-the-hog-pathway-against-the-growth-defect-caused-by-impaired-biosynthesis-of-complex-sphingolipids-in-yeast-saccharomyces-cerevisiae
#19
Yutaro Yamaguchi, Yuka Katsuki, Seiya Tanaka, Ryotaro Kawaguchi, Hiroto Denda, Takuma Ikeda, Kouichi Funato, Motohiro Tani
Complex sphingolipids play critical roles in various cellular events in the yeast Saccharomyces cerevisiae. To identify genes that are related to the growth defect caused by disruption of complex sphingolipid biosynthesis, we screened for suppressor mutations and multicopy suppressor genes that confer resistance against repression of AUR1 encoding inositol phosphorylceramide synthase. From the results of this screening, we found that the activation of high-osmolarity glycerol (HOG) pathway is involved in suppression of growth defect caused by impaired biosynthesis of complex sphingolipids...
December 7, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/29211350/the-angiotensin-ii-receptors-type-1-blockage-affects-the-urinary-bladder-activity-in-hyperosmolar-induced-detrusor-overactivity-in-rats-preliminary-results
#20
Kajetan Juszczak, Piotr Maciukiewicz
BACKGROUND: Angiotensin II receptors play a role in the pathogenesis of urinary bladder dysfunction, especially in the case of bladder outlet obstruction. The function of these receptors in the detrusor overactivity (DO) still remains unclear. OBJECTIVES: The study aims to investigate some of the mechanisms through which hyperosmolarity induces urinary bladder overactivity. The effect of angiotensin II receptor type 1 - AT1 (telmisartan) on urinary bladder function in physiological state and in hyperosmolar-induced DO in rat model was explored...
October 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
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