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https://www.readbyqxmd.com/read/28918378/enhanced-fluoride-removal-by-la-doped-li-al-layered-double-hydroxides
#1
Jianguo Cai, Xin Zhao, Yanyang Zhang, Quanxing Zhang, Bingcai Pan
In this study La intercalated Li/Al layered double hydroxide (LDH) was developed for efficient water defluoridation. The La-modified material, i.e., La doped Li/Al-LDH, exhibits more preferable fluoride adsorption than Li/Al-LDH in a broad pH range of 5-9, with the working capacity twice of the latter and seven times of magnitude higher than activated alumina. The fluoride removal kinetics is well fitted by pseudo-second order model, and the adsorption isotherm is well described by Freundlich model. Effect of pH and competing ions was examined during fluoride sequestration...
September 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28918245/biodiesel-production-from-lipid-of-carbon-dioxide-sequestrating-bacterium-and-lipase-of-psychrotolerant-pseudomonas-sp-istpl3-immobilized-on-biochar
#2
Khushboo Khosla, Rashmi Rathour, Raj Maurya, Neha Maheshwari, Edgard Gnansounou, Christian Larroche, Indu Shekhar Thakur
An extracellular lipase was purified and characterized from psychrotolerant bacterium Pseudomonas sp. ISTPL3 isolated from Pangong lake. Lipase was purified by sequential methods of ammonium sulphate precipitation, dialysis, DEAE-cellulose ion exchange chromatography and Sephadex G-100 gel filtration chromatography, resulting in a purification fold of 6.53 and yield of 5.45%. The molecular weight was approximately 31kDa. The purified lipase was used for transesterification of lipids produced by oleaginous chemolithotrophic bacterium Serratia sp...
September 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28916653/yap-suppresses-lung-squamous-cell-carcinoma-progression-via-deregulation-of-the-dnp63-gpx2-axis-and-ros-accumulation
#3
Hsinyi Huang, Wenjing Zhang, Yafang Pan, Yijun Gao, Lei Deng, Fuming Li, Fei Li, Xueyan Ma, Shenda Hou, Jing Xu, Peixue Li, Xiaoxun Li, Guohong Hu, Cheng Li, Haiquan Chen, Lei Zhang, Hongbin Ji
Lung squamous cell carcinoma (SCC), accounting for approximately 30% of non-small cell lung cancer, is often refractory to therapy. Screening a small molecule library, we identified digitoxin as a high potency compound for suppressing human lung SCC growth in vitro and in vivo. Mechanistic investigations revealed that digitoxin attenuated YAP phosphorylation and promoted YAP nuclear sequestration. YAP activation led to excessive accumulation of reactive oxygen species (ROS) by downregulating the antioxidant enzyme GPX2 in a manner related to p63 blockade...
September 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28915963/hepcidin-and-metallothioneins-as-molecular-base-for-sex-dependent-differences-in-clinical-course-of-experimental-autoimmune-encephalomyelitis-in-chronic-iron-overload
#4
Božena Ćurko-Cofek, Tanja Grubić Kezele, Vesna Barac-Latas
Multiple sclerosis is a chronic demyelinating disease of the central nervous system characterised by inflammatory and degenerative changes. It is considered that disease arises from the influence of environmental factors on genetically susceptible individuals. Recent researches, using magnetic resonance imaging, connected iron deposits in different brain regions with demyelinating process in multiple sclerosis patients. Although iron is an essential trace element important for many biological functions it could be harmful because iron excess can induce the production of reactive oxygen species, development of oxidative stress and lipid peroxidation which leads to demyelination...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28915320/adipose-tissue-as-a-site-of-toxin-accumulation
#5
Erin Jackson, Robin Shoemaker, Nika Larian, Lisa Cassis
We examine the role of adipose tissue, typically considered an energy storage site, as a potential site of toxicant accumulation. Although the production of most persistent organic pollutants (POPs) was banned years ago, these toxicants persist in the environment due to their resistance to biodegradation and widespread distribution in various environmental forms (e.g., vapor, sediment, and water). As a result, human exposure to these toxicants is inevitable. Largely due to their lipophilicity, POPs bioaccumulate in adipose tissue, resulting in greater body burdens of these environmental toxicants with obesity...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28914376/cubic-membrane-formation-supports-cell-survival-of-amoeba-chaos-under-starvation-induced-stress
#6
Ketpin Chong, Zakaria A Almsherqi, Han-Ming Shen, Yuru Deng
Cubic membranes (CM) are highly organized membrane structures found in biological systems. They are mathematically well defined and reveal a three-dimensional nano-periodic structure with cubic symmetry. These membrane arrangements are frequently induced in cells under stress, disease conditions, or upon viral infection. In this study, we investigated CM formation in the mitochondria of amoeba Chaos carolinense and observed a striking correlation between the organism's ability to generate CM and the cell survival under starvation...
September 15, 2017: Protoplasma
https://www.readbyqxmd.com/read/28912354/well-below-2-%C3%A2-c-mitigation-strategies-for-avoiding-dangerous-to-catastrophic-climate-changes
#7
Yangyang Xu, Veerabhadran Ramanathan
The historic Paris Agreement calls for limiting global temperature rise to "well below 2 °C." Because of uncertainties in emission scenarios, climate, and carbon cycle feedback, we interpret the Paris Agreement in terms of three climate risk categories and bring in considerations of low-probability (5%) high-impact (LPHI) warming in addition to the central (∼50% probability) value. The current risk category of dangerous warming is extended to more categories, which are defined by us here as follows: >1...
September 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28911043/multidrug-resistant-candida-epidemiology-molecular-mechanisms-and-treatment
#8
Maiken Cavling Arendrup, Thomas F Patterson
Invasive Candida infections remain an important cause of morbidity and mortality, especially in hospitalized and immunocompromised or critically ill patients. A limited number of antifungal agents from only a few drug classes are available to treat patients with these serious infections. Resistance can be either intrinsic or acquired. Resistance mechanisms are not exchanged between Candida; thus, acquired resistance either emerges in response to an antifungal selection pressure in the individual patient or, more rarely, occur due to horizontal transmission of resistant strains between patients...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28910618/ran-translation-regulated-by-muscleblind-proteins-in-myotonic-dystrophy-type-2
#9
Tao Zu, John D Cleary, Yuanjing Liu, Monica Bañez-Coronel, Jodi L Bubenik, Fatma Ayhan, Tetsuo Ashizawa, Guangbin Xia, H Brent Clark, Anthony T Yachnis, Maurice S Swanson, Laura P W Ranum
Several microsatellite-expansion diseases are characterized by the accumulation of RNA foci and RAN proteins, raising the possibility of a mechanistic connection. We explored this question using myotonic dystrophy type 2, a multisystemic disease thought to be primarily caused by RNA gain-of-function effects. We demonstrate that the DM2 CCTG⋅CAGG expansion expresses sense and antisense tetrapeptide poly-(LPAC) and poly-(QAGR) RAN proteins, respectively. In DM2 autopsy brains, LPAC is found in neurons, astrocytes, and glia in gray matter, and antisense QAGR proteins accumulate within white matter...
September 13, 2017: Neuron
https://www.readbyqxmd.com/read/28905284/effect-of-cadmium-bioavailability-in-food-on-its-compartmentalisation-in-carabids
#10
Agnieszka J Bednarska, Zuzanna M Świątek, Karolina Paciorek, Natalia Kubińska
Metals assimilated by organisms are sequestered in various compartments and some forms are more stable than others. Sequestration mechanisms used by invertebrates to detoxify metals and prevent interaction with important biomolecules include metal binding to proteins and other ligands, and storage in inorganic granules. The rate and extent at which metal concentrations in different compartments respond to metal concentrations in food and food characteristics has not received much attention, despite being of great relevance...
September 13, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28902888/dendrimer-based-selective-autophagy-induction-rescues-%C3%AE-f508-cftr-and-inhibits-pseudomonas-aeruginosa-infection-in-cystic-fibrosis
#11
Scott Mackenzie Brockman, Manish Bodas, David Silverberg, Ajit Sharma, Neeraj Vij
BACKGROUND: Cystic Fibrosis (CF) is a genetic disorder caused by mutation(s) in the CF-transmembrane conductance regulator (Cftr) gene. The most common mutation, ΔF508, leads to accumulation of defective-CFTR protein in aggresome-bodies. Additionally, Pseudomonas aeruginosa (Pa), a common CF pathogen, exacerbates obstructive CF lung pathology. In the present study, we aimed to develop and test a novel strategy to improve the bioavailability and potentially achieve targeted drug delivery of cysteamine, a potent autophagy-inducing drug with anti-bacterial properties, by developing a dendrimer (PAMAM-DEN)-based cysteamine analogue...
2017: PloS One
https://www.readbyqxmd.com/read/28902736/incidental-131i-activity-in-the-deltoid-region-on-posttherapy-radioiodine-scan
#12
Mark D Strober, Brandon R Callahan
A 71-year-old woman underwent a posttherapy radioiodine scan after I administration for papillary thyroid carcinoma. On day 1 of the posttreatment hospital isolation, the patient received a Pneumovax injection in the left deltoid muscle. A localized hypersensitivity reaction ensued with development of soft tissue edema and erythema at the Pneumovax injection site. This localized reaction persisted up to the subsequent posttherapy radioiodine scan 5 days after injection. Increased activity at the left deltoid region suggests a false-positive finding related to radiotracer sequestration due to inflammation from a localized postvaccination hypersensitivity reaction...
September 11, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28900844/a-pilot-study-on-the-use-of-cerebrospinal-fluid-cell-free-dna-in-intramedullary-spinal-ependymoma
#13
Ian David Connolly, Yingmei Li, Wenying Pan, Eli Johnson, Linya You, Hannes Vogel, John Ratliff, Melanie Hayden Gephart
Cerebrospinal fluid (CSF) represents a promising source of cell-free DNA (cfDNA) for tumors of the central nervous system. A CSF-based liquid biopsy may obviate the need for riskier tissue biopsies and serve as a means for monitoring tumor recurrence or response to therapy. Spinal ependymomas most commonly occur in adults, and aggressive resection must be delicately balanced with the risk of injury to adjacent normal tissue. In patients with subtotal resection, recurrence commonly occurs. A CSF-based liquid biopsy matched to the patient's spinal ependymoma mutation profile has potential to be more sensitive then surveillance MRI, but the utility has not been well characterized for tumors of the spinal cord...
September 12, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28900634/synergistic-enhancement-in-the-drug-sequestration-power-and-reduction-in-the-cytotoxicity-of-surfactants
#14
Rahul Kalel, Aruna K Mora, Birija S Patro, Dipak K Palit, Sukhendu Nath
Surfactants have often been employed for the sequestration of drugs from DNA. However, for an effective sequestration, the concentration of the surfactant needs to be higher than its critical micellar concentration (CMC). Use of such high concentrations of the surfactant may limit its practical usage as a sequestering agent due to its cytotoxicity. In the present study we have shown that sodium dodecyl sulfate (SDS) itself at a concentration less than its CMC failed to sequester a drug from DNA. However, the sequestration power of SDS at sub-CMC concentration could be enhanced to a significant extent when incorporated into Pluronic polymer micelles in the form of supramolecular assemblies...
September 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28898888/outcome-of-bronchopulmonary-sequestration-with-massive-pleural-effusion-after-intrafetal-vascular-laser-ablation
#15
Ingo Gottschalk, Brigitte Strizek, Michael R Mallmann, Andreas Müller, Annegret Geipel, Ulrich Gembruch, Philipp Klaritsch, Bence Csapo, Christoph Berg
OBJECTIVE: To assess the outcome of 12 fetuses with bronchopulmonary sequestration (BPS) and massive pleural effusion after intrafetal vascular laser ablation (VLA). METHODS: All fetuses with BPS and massive pleural effusion that were treated with intrafetal VLA during a 5-year period (2012-2016) were reviewed for safety, intrauterine course, and postnatal outcome. RESULTS: In the study period, 12 fetuses with BPS were treated with VLA. In 7 (58...
September 13, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28898784/variable-silver-nanoparticle-toxicity-to-daphnia-in-boreal-lakes
#16
Andrea L Conine, Daniel C Rearick, Marguerite A Xenopoulos, Paul C Frost
Variable sensitivity of organisms to silver nanoparticles (AgNPs) caused by changes in physico-chemical variables in aquatic ecosystems is receiving increasing attention. Variables such as dissolved organic carbon, pH, light, the presence of algae and bacteria, dissolved oxygen and different ions have all been studied individually, but it is still unclear how these variables in combination alter AgNP toxicity in natural ecosystems. Here we examined AgNP toxicity on survival of wild-caught Daphnia using AgNP suspensions placed in water from several different lakes at the IISD-Experimental Lakes Area, which span a gradient of water quality parameters...
September 6, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28894167/carbon-sequestration-potential-and-physicochemical-properties-differ-between-wildfire-charcoals-and-slow-pyrolysis-biochars
#17
Cristina Santín, Stefan H Doerr, Agustin Merino, Thomas D Bucheli, Rob Bryant, Philippa Ascough, Xiaodong Gao, Caroline A Masiello
Pyrogenic carbon (PyC), produced naturally (wildfire charcoal) and anthropogenically (biochar), is extensively studied due to its importance in several disciplines, including global climate dynamics, agronomy and paleosciences. Charcoal and biochar are commonly used as analogues for each other to infer respective carbon sequestration potentials, production conditions, and environmental roles and fates. The direct comparability of corresponding natural and anthropogenic PyC, however, has never been tested. Here we compared key physicochemical properties (elemental composition, δ(13)C and PAHs signatures, chemical recalcitrance, density and porosity) and carbon sequestration potentials of PyC materials formed from two identical feedstocks (pine forest floor and wood) under wildfire charring- and slow-pyrolysis conditions...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28894153/molecular-insights-into-photosynthesis-and-carbohydrate-metabolism-in-jatropha-curcas-grown-under-elevated-co2-using-transcriptome-sequencing-and-assembly
#18
Sumit Kumar, Rachapudi Venkata Sreeharsha, Shalini Mudalkar, Prasad M Sarashetti, Attipalli Ramachandra Reddy
Jatropha curcas L. (Family - Euphorbiaceae) is a perennial tree of special interest due to its potential as a biofuel plant with high carbon sequestration. In this study, physiological investigations coupled with transcriptomics in relation to photosynthesis were evaluated in Jatropha grown under ambient (395 ppm) and elevated (550 ppm) CO2 atmosphere. Morphophysiological analysis revealed that Jatropha sustained enhanced photosynthesis during its growth under elevated CO2 for one year which might be linked to improved CO2 assimilation physiology and enhanced sink activity...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893804/immune-thrombocytopenic-purpura-associated-with-fingolimod
#19
Hiu Lam Agnes Yuen, Susan Brown, Noel Chan, George Grigoriadis
Fingolimod is an oral sphingosine-1-phosphate receptor modulator which causes lymphocyte sequestration in lymph nodes and is approved for relapsing multiple sclerosis. The Therapeutic Goods Administration of Australia is aware of only one case where fingolimod preceded immune thrombocytopenic purpura (ITP) by 5 weeks. Here we report three such cases.None were on any medications known to cause ITP and routine investigations were unremarkable. All cases were treated with immunosuppression. Case 1 successfully weaned prednisolone after fingolimod cessation whereas case 2 weaned slowly while continuing fingolimod therapy...
September 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28893687/genetic-analysis-of-id1-dbl2x-predicts-its-validity-as-a-vaccine-candidate-in-colombia-and-supports-at-least-two-independently-introduced-plasmodium-falciparum-populations-in-the-region
#20
J Rajwani, C M Klinger, E Arango, M I Arroyo, A Sabbagh, A Maestre, J B Dacks, S Gnidehou, S K Yanow
Pregnancy-associated malaria (PAM) poses a threat to both the mother and fetus, increasing the risk of severe maternal anemia, fetal growth restriction and low birth weight infants. Two vaccines are currently in development to protect women from Plasmodium falciparum in pregnancy. Both vaccine constructs target the ID1-DBL2Xb domain of VAR2CSA, a protein expressed on the surface of infected erythrocytes (IEs) that mediates parasite sequestration in the placenta. Although development of an effective vaccine may be hampered by ID1-DBL2Xb polymorphisms expressed by field isolates, a recent study showed that genetic variation of this domain in South American parasite populations is much lower than in other geographical locations...
September 8, 2017: Infection, Genetics and Evolution
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