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https://www.readbyqxmd.com/read/27929413/exosome-proteome-of-u-87mg-glioblastoma-cells
#1
Sohyun Chun, Seunghyun Ahn, Chang-Hwan Yeom, Seyeon Park
Exosomes are small membrane vesicles between 30 and 100 nm in diameter secreted by many cell types, and are associated with a wide range of physiological and/or pathological processes. Exosomes containing proteins, lipids, mRNA, and microRNA contribute to cell-to-cell communication and cell-to-environment regulation, however, their biological functions are not yet fully understood. In this report, exosomes in the glioblastoma cell line, U-87MG, were isolated and the proteome was investigated. In addition, exosome proteome changes in U-87MG cells exposed to a low temperature were investigated to elucidate whether the exosome proteome could respond to an external stimulus...
December 6, 2016: Biology
https://www.readbyqxmd.com/read/27928525/effects-of-alcohol-consumption-frequency-on-health-index-in-korean-women
#2
Hee-Ju Kwon, Ik-Rae Cho, Hyo-Joo Park, Tae-Young Kim
BACKGROUND: In this study, we examined the status of Korean women's alcohol consumption and identified the physical changes they undergo according to the level of consumption. The results of this study may thus be used as raw data to effectively control women' drinking habits. METHODS: This study consists of a secondary analysis using data from female participants in the 6(th) Korea National Health and Nutrition Examination Survey, which was conducted by the Korea Centers for Disease Control and Prevention(2013-2014, V-2)...
August 2016: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/27927752/vesicular-ptdins-3-4-5-p3-and-rab-7-are-key-effectors-of-zygote-nuclear-membrane-fusion
#3
Marta G Lete, Richard D Byrne, Alicia Alonso, Dominic Poccia, Banafshé Larijani
Regulation of nuclear envelope (NE) dynamics is an important example of the universal phenomena of membrane fusion. The signalling molecules involved in nuclear membrane fusion may also be conserved in the formation of both pronuclear and zygote NEs in the fertilised egg. Here, we determine that Class I PI3-kinases are needed for in vitro nuclear envelope formation. We show that, in vivo, PtdIns(3,4,5)P3 is transiently located in vesicles around the male pronucleus at the time of nuclear envelope formation and around male and female pronuclei prior to membrane fusion...
December 7, 2016: Journal of Cell Science
https://www.readbyqxmd.com/read/27924494/characterization-of-membrane-protein-lipid-interactions-by-mass-spectrometry-ion-mobility-mass-spectrometry
#4
Yang Liu, Xiao Cong, Wen Liu, Arthur Laganowsky
Lipids in the biological membrane can modulate the structure and function of integral and peripheral membrane proteins. Distinguishing individual lipids that bind selectively to membrane protein complexes from an ensemble of lipid-bound species remains a daunting task. Recently, ion mobility mass spectrometry (IM-MS) has proven to be invaluable for interrogating the interactions between protein and individual lipids, where the complex undergoes collision induced unfolding followed by quantification of the unfolding pathway to assess the effect of these interactions...
December 6, 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27923656/the-novel-antioxidant-ta293-reveals-the-role-of-cytoplasmic-hydroxyl-radicals-in-oxidative-stress-induced-senescence-and-inflammation
#5
Takahiro Sakai, Jun Imai, Tomohiro Ito, Hidetsugu Takagaki, Michio Ui, Shinichi Hatta
The hydroxyl radical (OH) possesses the strongest oxidation potential among reactive oxygen species (ROS). Hydroxyl radicals react nonpreferentially with proteins, lipids, and nucleic acids. Additionally, mitochondrial localization of OH causes dysfunction in the mitochondria. The cytoplasmic targets of OH-induced oxidation are unknown. No cytoplasm-specific OH scavenger is available; thus, elucidating the cytoplasmic targets of OH-induced oxidation has proven difficult. Accordingly, we developed a cytoplasm-specific OH-targeted scavenger, TA293, and a mitochondrion-specific scavenger, mitoTA293...
December 3, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27921399/antioxidant-and-antidiabetic-properties-of-tartary-buckwheat-rice-flavonoids-after-in-vitro-digestion
#6
Tao Bao, Ye Wang, Yu-Ting Li, Vemana Gowd, Xin-He Niu, Hai-Ying Yang, Li-Shui Chen, Wei Chen, Chong-de Sun
Oxidative stress and diabetes have a tendency to alter protein, lipid, and DNA moieties. One of the strategic methods used to reduce diabetes-associated oxidative stress is to inhibit the carbohydrate-digesting enzymes, thereby decreasing gastrointestinal glucose production. Plant-derived natural antioxidant molecules are considered a therapeutic tool in the treatment of oxidative stress and diabetes. The objective of this study was to identify tartary buckwheat rice flavonoids and evaluate the effect of in vitro digestion on their antioxidant and antidiabetic properties...
2016: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/27919820/tnf-%C3%AE-and-cancer-cachexia-molecular-insights-and-clinical-implications
#7
REVIEW
Hetal J Patel, Bhoomika M Patel
Cancer cachexia characterized by a chronic wasting syndrome, involves skeletal muscle loss and adipose tissue loss and resistance to conventional nutritional support. Cachexia is responsible for the reduction in quality and length of life of cancer patients. It also decreases the muscle strength of the patients. The pro-inflammatory and pro-cachectic factors produced by the tumor cells have important role in genesis of cachexia. A number of pro-inflammatory cytokines, like interleukin-1 (IL-1), IL-6, tumor necrosis factor- alpha (TNF-α) may have important role in the pathological mechanisms of cachexia in cancer...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27919701/evaluation-of-the-neurotoxic-effects-of-chronic-embryonic-exposure-with-inorganic-mercury-on-motor-and-anxiety-like-responses-in-zebrafish-danio-rerio-larvae
#8
Noraini Abu Bakar, Nurul Syafida Asma' Mohd Sata, Nurul Farhana Ramlan, Wan Norhamidah Wan Ibrahim, Syaizwan Zahmir Zulkifli, Che Azurahanim Che Abdullah, Mohammad Noor Amal Azmai
Chronic exposure to mercury (Hg) can lead to cumulative impairments in motor and cognitive functions including alteration in anxiety responses. Although several risk factors have been identified in recent year, little is known about the environmental factors that either due exposure toward low level of inorganic mercury that may led to the developmental disorders. The present study investigated the effects of embryonic exposure of mercury chloride on motor function and anxiety-like behavior. The embryo exposed to 6 different concentrations of HgCl2 (7...
December 2, 2016: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/27913887/transcriptomics-analysis-of-hulless-barley-during-grain-development-with-a-focus-on-starch-biosynthesis
#9
Yawei Tang, Xingquan Zeng, Yulin Wang, Lijun Bai, Qijun Xu, Zexiu Wei, Hongjun Yuan, Tashi Nyima
Hulless barley, with its unique nutritional value and potential health benefits, has increasingly attracted attentions in recent years. However, the transcription dynamics during hulless barley grain development is not well understood. In the present study, we investigated the transcriptome changes during barley grain development using Illumina paired-end RNA-sequencing. Two datasets of the developing grain transcriptomes from two barley landraces with the differential seed starch synthesis traits were generated, and comparative transcriptome approach in both genotypes was performed...
December 2, 2016: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/27908272/exosome-encapsulated-micrornas-as-potential-circulating-biomarkers-in-colon-cancer
#10
Mina Hosseini, Sara Khatamianfar, Seyed Mahdi Hassanian, Reza Nedaeinia, Mojtaba Shafiee, Mina Maftouh, Majid Ghayour-Mobarhan, Soudabeh Shahid Sales, Amir Avan
Exosome-encapsulated microRNAs are being suggested as a new class novel biomarker and diagnostic and predictive markers in colorectal cancer. These particles are released from many cell types into the extracellular space upon fusion of multivesicular bodies (MVB) with the plasma membrane. They contain a wide variety of information, including proteins, lipids, RNAs, non-transcribed RNAs, microRNAs, which can be circulated in various body fluids (e.g., blood, salvia, ascites, urine). Exosomes can be taken up by neighboring or distant cells and thereby modulate the functional of recipient cells and play a key role in disease progression or facilitate metastasis in cancers...
December 1, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27906712/inflammation-remodeling-and-other-factors-affecting-hdl-cholesterol-efflux
#11
Graziella E Ronsein, Tomáš Vaisar
PURPOSE OF REVIEW: HDL to promote cholesterol efflux from macrophages is a predictor of cardiovascular risk independent of HDL cholesterol levels. However, the molecular determinants of HDL cholesterol efflux capacity (CEC) are largely unknown. RECENT FINDINGS: The term HDL defines a heterogeneous population of particles with distinct size, shape, protein, and lipid composition. Cholesterol efflux is mediated by multiple pathways that may be differentially modulated by HDL composition...
November 30, 2016: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/27902958/fructosylation-induced-structural-changes-in-mammalian-dna-examined-by-biophysical-techniques
#12
Asif Zaman, Zarina Arif, Khursheed Alam
Glycosylation of DNA, proteins, lipids, etc. by reducing sugars, can lead to the formation of advanced glycation end products (AGEs). These products may accumulate and involve in the pathogenesis of a number of diseases, contributing to tissue injury via several mechanisms. In this study, fructosylation of calf thymus dsDNA was carried out with varying concentrations of fructose. The neo-structure of fructosylated-DNA was studied by various biophysical techniques and morphological characterization. Fructosylated-DNA showed hyperchromicity, increase in fluorescence intensity and decrease in melting temperature...
November 20, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27899180/syncytiotrophoblast-extracellular-vesicles-circulating-biopsies-reflecting-placental-health
#13
Dionne Tannetta, Gavin Collett, Manu Vatish, Chris Redman, Ian Sargent
The ability to directly monitor the status of the placenta throughout pregnancy would be a major advance in both general and personalized obstetric care, allowing treatments to be tailored to the dynamic changes that can occur in gestation. Syncytiotrophoblast extracellular vesicles (STBEV) are membrane bound vesicles, released from the surface of the placenta directly into the maternal circulation, in the form of exosomes, microvesicles and apoptotic bodies. They carry many syncytiotrophoblast derived factors such as proteins, lipids, glycans and nucleic acids, which together could dynamically signal to the mother the status of the placenta...
November 16, 2016: Placenta
https://www.readbyqxmd.com/read/27885677/chemical-composition-of-microalgae-heterochlorella-luteoviridis-and-dunaliella-tertiolecta-with-emphasis-on-carotenoids
#14
Andressa Bacalau Diprat, Tania Menegol, Juliana Ferreira Boelter, Ariane Zmozinski, Maria Goreti Rodrigues Vale, Eliseu Rodrigues, Rosane Rech
BACKGROUND: Microalgae have been used as food supplements due their high protein, polyunsaturated fatty acids and carotenoid contents. As different carotenoids have distinct properties, and carotenoid composition from microalgae were poorly explored in the literature, this study determined the complete carotenoid composition from two microalgae species, Heterochlorella luteoviridis and Dunaliella tertiolecta, using high-performance liquid chromatography coupled to diode array detector and a mass spectrometry (HPLC-DAD-MS(2) )...
November 24, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27885443/roles-of-the-haustorium-and-endosperm-during-the-development-of-seedlings-of-acrocomia-aculeata-arecaceae-dynamics-of-reserve-mobilization-and-accumulation
#15
Hellen Cássia Mazzottini-Dos-Santos, Leonardo Monteiro Ribeiro, Denise Maria Trombert Oliveira
The mobilization of palm seed reserves is a complex process because of the abundance and diversity of stored compounds and results from the development of a highly specialized haustorium. This work focused on the important Neotropical oleaginous palm Acrocomia aculeata, with the aim of defining phases of seedling development associated with mobilization of reserves and elucidating the role of haustorium and endosperm in this process. Standard methods were performed, including biometric, anatomical, and histochemical analyses, as well as the evaluation of the activities of the enzymes endo-β-mannanase and lipase, throughout the reserve mobilization in seeds during germination and in seedlings...
November 24, 2016: Protoplasma
https://www.readbyqxmd.com/read/27884807/helix-helix-interactions-in-membrane-domains-of-bitopic-proteins-specificity-and-role-of-lipid-environment
#16
REVIEW
Eduard V Bocharov, Konstantin S Mineev, Konstantin V Pavlov, Sergey A Akimov, Andrey S Kuznetsov, Roman G Efremov, Alexander S Arseniev
Interaction between transmembrane helices often determines biological activity of membrane proteins. Bitopic proteins, a broad subclass of membrane proteins, form dimers containing two membrane-spanning helices. Some aspects of their structure-function relationship cannot be fully understood without considering the protein-lipid interaction, which can determine the protein conformational ensemble. Experimental and computer modeling data concerning transmembrane parts of bitopic proteins are reviewed in the present paper...
November 22, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27882483/effect-of-co2-concentration-on-growth-and-biochemical-composition-of-newly-isolated-indigenous-microalga-scenedesmus-bajacalifornicus-bbklp-07
#17
Lakkanagouda Patil, Basappa Kaliwal
Photosynthetic mitigation of CO2 through microalgae is gaining great importance due to its higher photosynthetic ability compared to plants, and the biomass can be commercially exploited for various applications. CO2 fixation capability of the newly isolated freshwater microalgae Scenedesmus bajacalifornicus BBKLP-07 was investigated using a 1-l photobioreactor. The cultivation was carried at varying concentration of CO2 ranging from 5 to 25%, and the temperature and light intensities were kept constant. A maximum CO2 fixation rate was observed at 15% CO2 concentration...
November 23, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27881864/mass-spectrometry-imaging-a-novel-technology-in-rheumatology
#18
REVIEW
Beatriz Rocha, Cristina Ruiz-Romero, Francisco J Blanco
Mass spectrometry imaging (MSI) is used to determine the relative abundance and spatial distribution of biomolecules such as peptides, proteins, lipids and other organic compounds in tissue sections by their molecular masses. This technique provides a sensitive and label-free approach for high-resolution imaging, and is currently used in an increasing number of biomedical applications such as biomarker discovery, tissue classification and drug monitoring. Owing to technological advances in the past 5 years in diverse MSI strategies, this technology is expected to become a standard tool in clinical practice and provides information complementary to that obtained using existing methods...
November 24, 2016: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/27881406/enrichment-of-selective-mirnas-in-exosomes-and-delivery-of-exosomal-mirnas-in-vitro-and-in-vivo
#19
Duo Zhang, Heedoo Lee, Ziwen Zhu, Jasleen K Minhas, Yang Jin
Exosomes are nano vesicles secreted by cells, and contain various molecules including protein, lipid and DNA/RNA. They are crucial mediators of the intercellular communication and serve as promising vehicles for drug delivery and gene therapy. Recently, accumulating evidence suggest that microRNAs (miRNAs) may serve as new and potentially powerful targets for therapeutic interventions against various human diseases. However, steadily and effectively delivering miRNA mimics or inhibitors to target cells remains a major obstacle...
November 23, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27879020/membrane-protein-insertase-yidc-in-bacteria-and-archaea
#20
REVIEW
Andreas Kuhn, Dorothee Kiefer
The insertion of proteins into the prokaryotic plasma membrane is catalyzed by translocases and insertases. On one hand, the Sec translocase operates as a transmembrane channel that can open laterally to first bind and then release the hydrophobic segments of a protein into the lipid bilayer. On the other hand, YidC insertases interact with their substrates in a groove-like structure at an amphiphilic protein-lipid interface thus allowing the transmembrane segments of the substrate to slide into the lipid bilayer...
November 23, 2016: Molecular Microbiology
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