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Lipid membrane disease

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https://www.readbyqxmd.com/read/28717005/lipid-oxidation-inactivates-the-anticoagulant-function-of-protein-z-dependent-protease-inhibitor-zpi
#1
Xin Huang, Baoxin Liu, Yidong Wei, Ryan Beyea, Han Yan, Steven T Olson
Lipid oxidation due to oxidative stress plays an important role in the pathogenesis of inflammatory and thrombotic cardiovascular diseases. Several findings suggest that lipid peroxidation can alter the function of coagulation proteins and contribute to a hypercoagulable state, but the molecular mechanisms are unclear. Here, we report that oxidized phospholipids suppress the anticoagulant function of the serpin, protein Z-dependent protease inhibitor (ZPI), a specific inhibitor of membrane-associated factor Xa (FXa) that requires protein Z (PZ), phospholipid and calcium as cofactors...
July 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28713160/pathogenic-roles-of-microvesicles-in-diabetic-retinopathy
#2
REVIEW
Wei Zhang, Song Chen, Ming-Lin Liu
Diabetic retinopathy (DR) is a common complication of diabetes and has been recognized as the leading cause of blindness in adults. Several interrelated molecular pathways are involved in the development of DR. Microvesicles (MVs) are cell membrane vesicles, which carry many biologic molecules, such as mRNAs, microRNAs, transcription factors, membrane lipids, membrane receptors, and other proteins. They may be involved in intercellular communication that can promote inflammation, angiogenesis, and coagulation...
July 17, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28708392/thiol-triggered-release-of-intraliposomal-content-from-liposomes-made-of-extremophile-inspired-tetraether-lipids
#3
Takaoki Koyanagi, Jessica L Cifelli, Geoffray Leriche, David Onofrei, Gregory P Holland, Jerry Yang
Liposomal drug delivery systems have been used for delivery of drugs to targeted tissues while reducing unwanted side effects. DOXIL®, for instance, is a liposomal formulation of the anti-cancer agent doxorubicin (DOX) that has been used to address problems associated with non-specific toxicity of free DOX. However, while this liposomal formulation allows for a more stable circulation of doxorubicin in the body compared with free drug, efficacy for cancer therapy is reduced when compared with systemic injections of free drug...
July 14, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28698628/%C3%AE-synuclein-control-of-mitochondrial-homeostasis-in-human-derived-neurons-is-disrupted-by-mutations-associated-with-parkinson-s-disease
#4
Victorio Martin Pozo Devoto, Nicolas Dimopoulos, Matías Alloatti, María Belén Pardi, Trinidad M Saez, María Gabriela Otero, Lucas Eneas Cromberg, Antonia Marín-Burgin, Maria Elida Scassa, Gorazd B Stokin, Alejandro F Schinder, Gustavo Sevlever, Tomás Luis Falzone
The etiology of Parkinson's disease (PD) converges on a common pathogenic pathway of mitochondrial defects in which α-Synuclein (αSyn) is thought to play a role. However, the mechanisms by which αSyn and its disease-associated allelic variants cause mitochondrial dysfunction remain unknown. Here, we analyzed mitochondrial axonal transport and morphology in human-derived neurons overexpressing wild-type (WT) αSyn or the mutated variants A30P or A53T, which are known to have differential lipid affinities...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698529/naturally-occurring-compounds-new-potential-weapons-against-oxidative-stress-in-chronic-kidney-disease
#5
REVIEW
Lorenzo Signorini, Simona Granata, Antonio Lupo, Gianluigi Zaza
Oxidative stress is a well-described imbalance between the production of reactive oxygen species (ROS) and the antioxidant defense system of cells and tissues. The overproduction of free radicals damages all components of the cell (proteins, lipids, nucleic acids) and modifies their physiological functions. As widely described, this condition is a biochemical hallmark of chronic kidney disease (CKD) and may dramatically influence the progression of renal impairment and the onset/development of major systemic comorbidities including cardiovascular diseases...
July 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28697812/imaging-and-lipidomics-methods-for-lipid-analysis-in-metabolic-and-cardiovascular-disease
#6
K G Stevens, C A Bader, A Sorvina, D A Brooks, S E Plush, J L Morrison
Cardiometabolic diseases exhibit changes in lipid biology, which is important as lipids have critical roles in membrane architecture, signalling, hormone synthesis, homoeostasis and metabolism. However, Developmental Origins of Health and Disease studies of cardiometabolic disease rarely include analysis of lipids. This short review highlights some examples of lipid pathology and then explores the technology available for analysing lipids, focussing on the need to develop imaging modalities for intracellular lipids...
July 12, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28697670/germination-of-spores-of-the-orders-bacillales-and-clostridiales
#7
Peter Setlow, Shiwei Wang, Yong-Qing Li
Dormant Bacillales and Clostridiales spores begin to grow when small molecules (germinants) trigger germination, potentially leading to food spoilage or disease. Germination-specific proteins sense germinants, transport small molecules, and hydrolyze specific bonds in cortex peptidoglycan and specific proteins. Major events in germination include (a) germinant sensing; (b) commitment to germinate; (c) release of spores' depot of dipicolinic acid (DPA); (d) hydrolysis of spores' peptidoglycan cortex; and (e) spore core swelling and water uptake, cell wall peptidoglycan remodeling, and restoration of core protein and inner spore membrane lipid mobility...
July 11, 2017: Annual Review of Microbiology
https://www.readbyqxmd.com/read/28695207/peripheral-myelin-protein-22-alters-membrane-architecture
#8
Kathleen F Mittendorf, Justin T Marinko, Cheri M Hampton, Zunlong Ke, Arina Hadziselimovic, Jonathan P Schlebach, Cheryl L Law, Jun Li, Elizabeth R Wright, Charles R Sanders, Melanie D Ohi
Peripheral myelin protein 22 (PMP22) is highly expressed in myelinating Schwann cells of the peripheral nervous system. PMP22 genetic alterations cause the most common forms of Charcot-Marie-Tooth disease (CMTD), which is characterized by severe dysmyelination in the peripheral nerves. However, the functions of PMP22 in Schwann cell membranes remain unclear. We demonstrate that reconstitution of purified PMP22 into lipid vesicles results in the formation of compressed and cylindrically wrapped protein-lipid vesicles that share common organizational traits with compact myelin of peripheral nerves in vivo...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28694532/membrane-association-landscape-of-myelin-basic-protein-portrays-formation-of-the-myelin-major-dense-line
#9
Arne Raasakka, Salla Ruskamo, Julia Kowal, Robert Barker, Anne Baumann, Anne Martel, Jussi Tuusa, Matti Myllykoski, Jochen Bürck, Anne S Ulrich, Henning Stahlberg, Petri Kursula
Compact myelin comprises most of the dry weight of myelin, and its insulative nature is the basis for saltatory conduction of nerve impulses. The major dense line (MDL) is a 3-nm compartment between two cytoplasmic leaflets of stacked myelin membranes, mostly occupied by a myelin basic protein (MBP) phase. MBP is an abundant myelin protein involved in demyelinating diseases, such as multiple sclerosis. The association of MBP with lipid membranes has been studied for decades, but the MBP-driven formation of the MDL remains elusive at the biomolecular level...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694219/hepatic-abca1-deficiency-is-associated-with-delayed-apolipoprotein-b-secretory-trafficking-and-augmented-vldl-triglyceride-secretion
#10
Mingxia Liu, Soonkyu Chung, Gregory S Shelness, John S Parks
ATP binding cassette transporter A1 (ABCA1) is a membrane transporter that facilitates nascent HDL formation. Tangier disease subjects with complete ABCA1 deficiency have <5% of normal levels of plasma HDL, elevated triglycerides (TGs), and defective vesicular trafficking in fibroblasts and macrophages. Hepatocyte-specific ABCA1 knockout mice (HSKO) have a similar lipid phenotype with 20% of normal plasma HDL levels and a two-fold elevation of plasma TGs due to hepatic overproduction of large, triglyceride-enriched VLDL...
July 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28688796/fatty-acid-based-lipidomics-and-membrane-remodeling-induced-by-apoe3-and-apoe4-in-human-neuroblastoma-cells
#11
Paraskevi Prasinou, Ioannis Dafnis, Giorgia Giacometti, Carla Ferreri, Angeliki Chroni, Chryssostomos Chatgilialoglu
Apolipoprotein E (apoE) is a major lipid carrier of the lipoprotein transport system that plays critical roles in various pathologies. Human apoE has three common isoforms, the apoE4 being associated with Alzheimer's disease. This is the first study in the literature investigating the effects of apoE (apoE3 and apoE4 isoforms) on membrane fatty acid profile in neuroblastoma SK-N-SH cells. Fatty acid analyses were carried out by gas chromatography of the corresponding methyl esters (FAME). We observed the occurrence of membrane fatty acid remodeling in the presence of each of the two apoE isoforms...
July 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28687359/identification-and-characterization-of-the-lamprey-flotillin-1-gene-with-a-role-in-cell-adhesion
#12
Rong Xu, Xiaoping Song, Peng Su, Yue Pang, Qingwei Li
Flotillin-1 is a kind of localize into specific cholesterol rich microdomains in cellular membranes and highly conserved lipid rafts marker protein widely distributed in animals and plants. It provides a platform for the reaction of many proteins in signal transduction, as scaffolding plays an important role in transmembrane signaling and cell adhesion. Here, Flotillin-1 protein from lamprey was identified and characterized (designated as L-Flotillin-1). After a partial cDNA sequence of L-Flotillin-1 was identified in a lamprey supraneural body cDNA library, the full-length cDNA was obtained using 3'- and 5'-rapid amplification of cDNA ends (RACE)...
July 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28686542/polyunsaturated-fatty-acids-and-endocannabinoids-in-health-and-disease
#13
Hércules Rezende Freitas, Alinny Rosendo Isaac, Renato Malcher-Lopes, Bruno Lourenço Diaz, Isis Hara Trevenzoli, Ricardo Augusto De Melo Reis
Polyunsaturated fatty acids (PUFAs) are lipid derivatives of omega-3 (docosahexaenoic acid, DHA, and eicosapentaenoic acid, EPA) or of omega-6 (arachidonic acid, ARA) synthesized from membrane phospholipids and used as a precursor for endocannabinoids (ECs). They mediate significant effects in the fine-tune adjustment of body homeostasis. Phyto- and synthetic cannabinoids also rule the daily life of billions worldwide, as they are involved in obesity, depression and drug addiction. Consequently, there is growing interest to reveal novel active compounds in this field...
July 7, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28679281/lipid-mediated-modulation-of-intracellular-ion-channels-and-redox-state-physio-pathological-implications
#14
Marisa Brini, Luigi Leanza, Ildiko Szabo
<i>Significance</i>: Ion channels play an important role in the regulation of organelle function within the cell, as proven by increasing evidence pointing to a link between altered function of intracellular ion channels and different pathologies ranging from cancer to neurodegenerative diseases, ischemic damage and lysosomal storage diseases. <i>Recent Advances</i>: A link between these pathologies and redox state as well as lipid homeostasis and ion channel function is in the focus of current research...
July 5, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28677502/pten-insulin-resistance-and-cancer
#15
Aiqing Li, Minzi Qiu, Hongbo Zhou, Tao Wang, Wen Guo
BACKGROUND: The tumor suppressor PTEN serves as a negative regulator of PI3K/PTEN/Akt signaling pathway that regulates cellular functions such as cell growth, differentiation, proliferation and migration. The PI3K/PTEN/Akt signaling cascades might also have effect on glucose uptake via translocation of GLUT-4. Insulin controls energy storage and the whole body glucose homeostasis. Its binding to insulin receptor on the surface of diverse cells allows glucose entry into cells, and activates a variety of cellular actions...
July 4, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28676332/circulating-exosomes-in-obstructive-sleep-apnea-as-phenotypic-biomarkers-and-mechanistic-messengers-of-end-organ-morbidity
#16
REVIEW
Abdelnaby Khalyfa, Leila Kheirandish-Gozal, David Gozal
Obstructive sleep apnea (OSA), the most severe form of sleep disordered breathing, is characterized by intermittent hypoxia during sleep (IH), sleep fragmentation, and episodic hypercapnia. OSA is associated with increased risk for morbidity and mortality affecting cardiovascular, metabolic, and neurocognitive systems, and more recently with non-alcoholic fatty liver disease (NAFLD) and cancer-related deaths. Substantial variability in OSA outcomes suggests that genetically-determined and environmental and lifestyle factors affect the phenotypic susceptibility to OSA...
July 1, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28672983/neuroprotective-effect-of-carnosine-against-salsolinol-induced-parkinson-s-disease
#17
Jun Zhao, Lei Shi, Li-Rong Zhang
Carnosine is a dipeptide of β-alanine and histidine amino acids. It is widely present in muscle and brain tissues. Carnosine has been demonstrated to be an antioxidant agent that is beneficial in animals. Reactive oxygen species (ROS) and aldehydes are are generated from membrane fatty acid oxidation. The antioxidant potential and toxicity of salsolinol had been extensively studied in vivo and in vitro. The present study analyzed the protective effect of carnosine against Parkinson's disease in the salsolinol-induced rat brain and rat brain endothelial cells...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28671142/the-role-of-lipids-interacting-with-%C3%AE-synuclein-in-the-pathogenesis-of-parkinson-s-disease
#18
Céline Galvagnion
α-synuclein is a small protein abundantly expressed in the brain and located in synaptic terminals. The conversion of α-synuclein into oligomers and fibrils is the hallmark of a range of neurodegenerative disorders including Parkinson's disease and dementia with Lewy bodies. α-synuclein is disordered in solution but can adopt an α-helical conformation when bound to lipid membranes. This lipid-protein interaction plays an important role in its proposed biological function, i.e., synaptic plasticity, but can also entail the aggregation of the protein...
June 30, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28668323/cestode-parasites-release-extracellular-vesicles-with-micrornas-and-immunodiagnostic-protein-cargo
#19
María Eugenia Ancarola, Antonio Marcilla, Michaela Herz, Natalia Macchiaroli, Matías Pérez, Sebastián Asurmendi, Klaus Brehm, Carolina Poncini, Mara Rosenzvit, Marcela Cucher
Intercellular communication is crucial in multiple aspects of cell biology. This interaction can be mediated by several mechanisms including extracellular vesicle (EV) transfer. EV secretion by parasites has been reported in protozoans, trematodes and nematodes. Here we report that this mechanism is present in three different species of cestodes, Taenia crassiceps, Mesocestoides corti and Echinococcus multilocularis. To confirm this we determined, in vitro, the presence of EVs in culture supernatants by transmission electron microscopy...
June 29, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28666962/decreased-calcium-flux-in-niemann-pick-type-c1-patient-specific-ipsc-derived-neurons-due-to-higher-amount-of-calcium-impermeable-ampa-receptors
#20
Michael Rabenstein, Franziska Peter, Sarah Joost, Michaela Trilck, Arndt Rolfs, Moritz J Frech
Niemann-Pick disease type C1 (NPC1) is a rare progressive neurodegenerative disorder caused by mutations in the NPC1 gene, resulting mainly in the accumulation of cholesterol and the ganglioside GM2. Recently, we described accumulations of these lipids in neuronal differentiated cells derived from NPC1 patient-specific induced pluripotent stem cells (iPSCs). As these lipids are essential for proper cell membrane composition, we were interested in the expression and function of voltage-gated ion channels and excitatory AMPA receptors (AMPARs) in neurons derived from three patient-specific iPSC lines...
June 27, 2017: Molecular and Cellular Neurosciences
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