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https://www.readbyqxmd.com/read/29775569/modification-of-chickpea-cystatin-by-reactive-dicarbonyl-species-glycation-oxidation-and-aggregation
#1
Sheraz Ahmad Bhat, Waseem Feeroze Bhat, Mohammad Afsar, Mohd Shahnawaz Khan, Bilqees Bano
Reactive dicarbonyl species such as methylglyoxal (MGO) and glyoxal (GO) have recently received extensive attention due to their high reactivity and ability to modify biological substances such as proteins, phospholipids, and DNA. In case of proteins these reactive species mainly react with lysine and arginine residues to form AGEs, oxidative products, and aggregates. Chickpea cystatin (CPC) was incubated with varying concentrations of glyoxal and methylglyoxal which caused, along with altered secondary and tertiary structures, glycation, functional inactivation, altered redox state, cross-linking and high-molecular-mass aggregation...
May 15, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29775480/titan-cells-formation-in-cryptococcus-neoformans-is-finely-tuned-by-environmental-conditions-and-modulated-by-positive-and-negative-genetic-regulators
#2
Benjamin Hommel, Liliane Mukaremera, Radames J B Cordero, Carolina Coelho, Christopher A Desjardins, Aude Sturny-Leclère, Guilhem Janbon, John R Perfect, James A Fraser, Arturo Casadevall, Christina A Cuomo, Françoise Dromer, Kirsten Nielsen, Alexandre Alanio
The pathogenic fungus Cryptococcus neoformans exhibits morphological changes in cell size during lung infection, producing both typical size 5 to 7 μm cells and large titan cells (> 10 μm and up to 100 μm). We found and optimized in vitro conditions that produce titan cells in order to identify the ancestry of titan cells, the environmental determinants, and the key gene regulators of titan cell formation. Titan cells generated in vitro harbor the main characteristics of titan cells produced in vivo including their large cell size (>10 μm), polyploidy with a single nucleus, large vacuole, dense capsule, and thick cell wall...
May 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29775177/novosphingobium-arvoryzae-sp-nov-isolated-from-a-flooded-rice-field
#3
Shih-Yi Sheu, Cheng-Wen Huang, Jhen-Ci Chen, Zih-Han Chen, Wen-Ming Chen
A bacterial strain, designated Jyi-02T , was isolated from a flooded rice field in Taiwan and characterized using the polyphasic taxonomy approach. Cells of strain Jyi-02T were aerobic, Gram-stain-negative, rod-shaped, non-motile and formed yellowish orange coloured colonies. Growth occurred at 10-40 °C (optimum, 20 °C) and pH 5.0-9.0 (optimum, pH 7.0) and in the presence of 0-1.0 % NaCl (optimum, 0 %, w/v). The major fatty acids (>10 %) of strain Jyi-02T were C18 : 1ω7c, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and C14 : 0 2-OH...
May 18, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29774653/matrix-glycoprotein-interactions-required-for-budding-of-a-plant-nucleorhabdovirus-and-induction-of-inner-nuclear-membrane-invagination
#4
Kai Sun, Xin Zhou, Wenye Lin, Xueping Zhou, Andrew O Jackson, Zhenghe Li
Nucleorhabdoviruses such as Sonchus yellow net virus (SYNV) replicate in the nuclei and undergo morphogenesis at the inner nuclear membrane (IM) in plant cells. Mature particles are presumed to form by budding of the Matrix (M) protein-nucleocapsid complexes through host IMs to acquire host phospholipids and the surface glycoproteins (G). To address mechanisms underlying nucleorhabdovirus budding, we generated recombinant SYNV G mutants containing a truncated amino-terminal (NT) or carboxyl-terminal (CT) domain...
May 18, 2018: Molecular Plant Pathology
https://www.readbyqxmd.com/read/29774334/a-comparative-study-of-epa-enriched-ethanolamine-plasmalogen-and-epa-enriched-phosphatidylethanolamine-on-a%C3%AE-42-induced-cognitive-deficiency-in-a-rat-model-of-alzheimer-s-disease
#5
Hongxia Che, Qian Li, Tiantian Zhang, Lin Ding, Lingyu Zhang, Haohao Shi, Teruyoshi Yanagita, Changhu Xue, Yaoguang Chang, Yuming Wang
Ethanolamine plasmalogen (pPE), a major phospholipid in neuronal membranes, is specifically reduced in postmortem brains from patients with Alzheimer's disease (AD). The purpose of the present study was to compare the effects of EPA-enriched ethanolamine plasmalogen (EPA-pPE) and EPA-enriched phosphatidylethanolamine (EPA-PE) on cognitive deficiency and illustrate the possible underlying mechanisms. SD rats were divided into four groups including the sham group injected with 0.9% saline and three amyloid-β (Aβ) infusion groups, Aβ42 group, EPA-pPE group and EPA-PE group...
May 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29774141/exosome-mediated-peritoneal-dissemination-in-gastric-cancer-and-its-clinical-applications
#6
REVIEW
Kai-Bo Chen, Jian Chen, Xiao-Li Jin, Yi Huang, Qiu-Ming Su, Li Chen
The prognosis of patients with peritoneal dissemination from gastric cancer is poor, and the underlying molecular mechanism remains unclear. Exosomes, as macromolecular phospholipid bilayer vesicles comprising of proteins, nucleic acids and lipids, serve as mediators of cell-cell communication. Gastric cancer tumor-derived exosomes may be involved in the pathological process of peritoneal dissemination by mediating crosstalk between cancer cells and mesothelial cells, to result in the induction of enhanced tumor growth, migratory, adhesive and invasive abilities, peritoneal fibrosis and apoptosis, mesothelial-to-mesenchymal transition, angiogenesis and chemoresistance...
June 2018: Biomedical Reports
https://www.readbyqxmd.com/read/29773873/therapeutic-nanoparticles-penetrate-leaves-and-deliver-nutrients-to-agricultural-crops
#7
Avishai Karny, Assaf Zinger, Ashima Kajal, Janna Shainsky-Roitman, Avi Schroeder
As the world population grows, there is a need for efficient agricultural technologies to provide global food requirements and reduce environmental toll. In medicine, nanoscale drug delivery systems grant improved therapeutic precision by overcoming biological barriers and enhancing drug targeting to diseased tissues. Here, we loaded nanoscale drug-delivery systems with agricultural nutrients, and applied them to the leaves of tomato plants. We show that the nanoparticles - liposomes composed of plant-derived lipids, penetrate the leaf and translocate in a bidirectional manner, distributing to other leaves and to the roots...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773840/rna-seq-and-uhplc-q-tof-ms-based-lipidomics-study-in-lysiphlebia-japonica
#8
Xueke Gao, Junyu Luo, Limin Lü, LiJuan Zhang, Shuai Zhang, Jinjie Cui
Lipids play an important role in energy storage, membrane structure stabilization and signaling. Parasitoids are excellent models to study lipidomics because a majority of them do not accumulate during their free-living life-stage. Studies on parasitoids have mostly focused on the changes in the lipids and gene transcripts in hosts and little attention has been devoted to lipidomics and transcriptomics changes in parasitoids. In this study, a relative quantitative analysis of lipids and their gene transcripts in 3-days-old Lysiphlebia japonica larva (3 days after spawning) and pupae were performed using liquid chromatography, mass spectrometry and RNA-seq...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773800/x-ray-structure-of-a-carpet-like-antimicrobial-defensin-phospholipid-membrane-disruption-complex
#9
Michael Järvå, Fung T Lay, Thanh Kha Phan, Cassandra Humble, Ivan K H Poon, Mark R Bleackley, Marilyn A Anderson, Mark D Hulett, Marc Kvansakul
Defensins are cationic antimicrobial peptides expressed throughout the plant and animal kingdoms as a first line of defense against pathogens. Membrane targeting and disruption is a crucial function of many defensins, however the precise mechanism remains unclear. Certain plant defensins form dimers that specifically bind the membrane phospholipids phosphatidic acid (PA) and phosphatidylinositol 4,5-bisphosphate, thereby triggering the assembly of defensin-lipid oligomers that permeabilize cell membranes. To understand this permeabilization mechanism, here we determine the crystal structure of the plant defensin NaD1 bound to PA...
May 17, 2018: Nature Communications
https://www.readbyqxmd.com/read/29773670/high-%C3%AE-tocopherol-dosing-increases-lipid-metabolism-by-changing-redox-state-in-damaged-rat-gastric-mucosa-and-liver-after-ethanol-treatment
#10
Marisela Olguín-Martínez, Diego R Hernández-Espinosa, Rolando Hernández-Muñoz
Regeneration of ethanol-injured rat gastric mucosa must undergo changes in major metabolic pathways to achieve DNA replication and cell proliferation. These events are highly dependent on glucose utilization and inhibited by vitamin E (α-tocopherol) administration. Therefore, this study was aimed at assessing lipid metabolism in the gastric mucosa and ethanol-induced gastric damage and the effect of α-tocopherol administration. For this, rates of fatty acid β-oxidation and lipogenesis were tested in gastric mucosa samples...
May 17, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29770896/mitochondrial-morphology-and-function-impaired-by-dimethyl-sulfoxide-and-dimethyl-formamide
#11
Long Ma, Jia-Xin Dong, Wen-Rong Fu, Xue-Yi Li, Jing Chen, Yi Liu
In this work, the effects of two non-ionic, non-hydroxyl organic solvents, dimethyl sulfoxide (DMSO) and dimethyl formamide (DMF) on the morphology and function of isolated rat hepatic mitochondria were investigated and compared. Mitochondrial ultrastructures impaired by DMSO and DMF were clearly observed by transmission electron microscopy. Spectroscopic and polarographic results demonstrated that organic solvents induced mitochondrial swelling, enhanced the permeation to H+ /K+ , collapsed the potential inner mitochondrial membrane (IMM), and increased the IMM fluidity...
May 17, 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29770409/acemetacin-phosphatidylcholine-interactions-are-determined-by-the-drug-ionization-state
#12
Catarina Pereira-Leite, Cláudia Nunes, Débora Grahl, José C Bozelli, Shirley Schreier, Christina S Kamma-Lorger, Iolanda M Cuccovia, Salette Reis
Gastrointestinal (GI) toxicity is a major drawback of the chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs). The NSAIDs topical actions on the protective phospholipid layers of the GI mucosa seem to be a central toxicity mechanism of these pharmaceuticals. This work describes the interactions of acemetacin, a commercialized NSAID, with 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) bilayers at pH 3.0, 5.0, and 7.4. This pH range was chosen to mimic the pH gradient found in the gastric mucosa, and to ultimately gain insights into the mechanisms underlying the acemetacin-induced gastric toxicity...
May 17, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29769200/long-chain-n-3-fatty-acids-attenuate-oncogenic-kras-driven-proliferation-by-altering-plasma-membrane-nanoscale-proteolipid-composition
#13
Natividad R Fuentes, Mohamed Mlih, Rola Barhoumi, Yang-Yi Fan, Paul Hardin, Trevor J Steele, Spencer Behmer, Ian A Prior, Jason Karpac, Robert S Chapkin
Ras signaling originates from transient nanoscale compartmentalized regions of the plasma membrane composed of specific proteins and lipids. The highly specific lipid composition of these nanodomains, termed nanoclusters, facilitates effector recruitment and therefore influences signal transduction. This suggests that Ras nanocluster proteolipid composition could represent a novel target for future chemoprevention interventions. There is evidence that consumption of fish oil containing long-chain n-3 polyunsaturated fatty acids (n-3 PUFA) such as eicosapentaenoic acid (EPA, 20:5Δ5,8,11,14,17) and docosahexaenoic acid (DHA, 22:6Δ4,7,10,13,16,19) may reduce colon cancer risk in humans, yet the mechanism underlying this effect is unknown...
May 16, 2018: Cancer Research
https://www.readbyqxmd.com/read/29768974/brain-phospholipid-precursors-administered-post-injury-reduce-tissue-damage-and-improve-neurological-outcome-in-experimental-traumatic-brain-injury
#14
Orli Thau-Zuchman, Rita Noutel Gomes, Simon Christopher Dyall, Meirion Davis, John V Priestley, Martine Groenendijk, Martijn DE Wilde, Jordi Lopez-Tremoleda, Adina T Michael-Titus
Traumatic brain injury (TBI) leads to cellular loss, destabilisation of membranes, disruption of synapses and altered brain connectivity, and increased risk of neurodegenerative disease. A significant and long-lasting decrease in phospholipids (PL), essential membrane constituents, has recently been reported in plasma and brain tissue, in human and experimental TBI. We hypothesised that supporting PL synthesis post-injury could improve outcome after TBI. We tested this hypothesis using a multi-nutrient combination designed to support the biosynthesis of phospholipids and available for clinical use...
May 17, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29768884/coating-chitosan-thin-shells-a-facile-technique-to-improve-dispersion-stability-of-magnetoliposomes
#15
Thi Tuong Vy Phan, Madhappan Santha Moorthy, Hyun Wook Kang, Seung Yun Nam, Yong Wook Lee, Junghwan Oh
Magnetoliposomes (ML) have been emerging as a novel multifunctional nanoparticle with a wide range of biomedical and therapeutic applications over the past decade. Although the ML system has shown excellent performances, the stability and lipid peroxidation of liposomal components are still remaining as key issues and need to be solved for intensive applications. Changing zeta potential of nanoparticles' surface can be seen as a potential way to achieve the stable dispersion. In this work, we have employed the positive charged, abundant and cheap chitosan to coat ML in order to change the zeta potential of the ML system and examined the stability of chitosan@magnetoliposomes (CML) in long-term storage...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768016/cisplatin-encapsulation-generates-morphologically-different-multi-compartments-in-the-internal-nanostructures-of-non-lamellar-liquid-crystalline-self-assemblies
#16
Intan Diana Mat Azmi, Jesper Ostergaard, Stefan Sturup, Bente Gammelgaard, Arto Urtti, Seyed Moein Moghimi, Anan Yaghmur
Cisplatin (cis-diamminedichloroplatinum (II)) is among the most potent cytotoxic agents used in cancer chemotherapy. The encapsulation of cisplatin in lipid-based drug carriers has been challenging owing to its low solubility in both aqueous and lipid phases. Here, we investigated cisplatin encapsulation in non-lamellar liquid crystalline (LC) nanodispersions formed from a ternary mixture of phytantriol (PHYT), vitamin E (Vit E) and an anionic phospholipid [either phosphatidylglycerol (DSPG) or phosphatidylserine (DPPS)]...
May 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29767617/mangrovicoccus-ximenensis-gen-nov-sp-nov-isolated-from-mangrove-forest-sediment
#17
Zhiliang Yu, Yang Cao, Guoqiang Zhou, Jianhua Yin, Juanping Qiu
A Gram-strain-negative, coccoid bacterium, lacking bacteriochlorophyll, designated strain T1lg56T , was isolated from a sediment sample collected from Ximen island mangrove forest, Zhejiang province, China. Cells were halotolerant, and catalase- and oxidase-positive. Growth was observed at 18-42 °C (optimum, 35 °C), at pH 6.0-9.5 (optimum, pH 6.5) and in the presence of 0-15 % (w/v) NaCl (optimum, 2-5 %). The major cellular fatty acids were C18 : 1ω7c and C16 : 0. The polar lipid profile of strain T1lg56T consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylmonomethylethanolamine, two unidentified phospholipids and five unidentified lipids...
May 16, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29767519/molecular-structure-and-permeability-at-the-interface-between-phase-separated-membrane-domains
#18
Rodrigo Maghdissian Cordeiro
Phase-separated membrane domains, also known as lipid rafts, are believed to play an important role in cell function. Although most rafts are sterol-enriched membrane regions, evidence suggests that living cells may also contain gel-like rafts. Interactions between gel and fluid domains have a large impact on membrane properties, as is the case with permeability. The membrane permeability may reach a peak at the main phase transition temperature, by far exceeding the values recorded at the fluid phase. It has been proposed that gel-fluid interfaces are leaky, but the effect has not yet been demonstrated at the molecular level...
May 16, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29765163/polyunsaturated-fatty-acid-status-at-birth-childhood-growth-and-cardiometabolic-risk-a-pooled-analysis-of-the-mefab-and-rhea-cohorts
#19
Nikos Stratakis, Marij Gielen, Katerina Margetaki, Renate H M de Groot, Maria Apostolaki, Georgia Chalkiadaki, Marina Vafeiadi, Vasiliki Leventakou, Marianna Karachaliou, Roger W Godschalk, Manolis Kogevinas, Euripides G Stephanou, Maurice P Zeegers, Leda Chatzi
BACKGROUND/OBJECTIVES: Polyunsaturated fatty acid (PUFA) status during pregnancy has been suggested to influence offspring obesity and cardiometabolic health. We assessed whether prenatal PUFA exposure is associated with rapid infant growth, childhood BMI, and cardiometabolic profile. SUBJECTS/METHODS: In the Dutch MEFAB (n = 266) and Greek RHEA (n = 263) cohorts, we measured n-3 and n-6 PUFA concentrations in cord blood phospholipids, which reflect fetal exposure in late pregnancy...
May 16, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29764231/important-considerations-in-pregnant-patients-with-lupus-nephritis
#20
Gabriella Moroni, Claudio Ponticelli
In the last few decades, identification of predictors of pregnancy outcome and appropriate pregnancy planning have significantly reduced the maternal and fetal risks in pregnant women with lupus nephritis. Areas covered: Successful pregnancies have been reported even in women with chronic renal disease and renal insufficiency. However, refractory hypertension and severe renal or cardiac chronic dysfunction are still considered contraindications to pregnancy. Pre-term delivery and fetal growth restriction may still occur in SLE patients more frequently than in healthy women, even in pregnancies regularly planned and monitored by a team of nephrologists and gynaecologists...
May 15, 2018: Expert Review of Clinical Immunology
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