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https://www.readbyqxmd.com/read/28325059/lysophospholipids-and-their-receptors-serve-as-conditional-damps-and-damp-receptors-in-tissue-oxidative-and-inflammatory-injury
#1
Ying Shao, Gayani Nanayakkara, Jiali Cheng, Ramon Cueto, William Y Yang, Joon-Young Park, Hong Wang, Xiaofeng Yang
SIGNIFICANCE: We proposed LPLs and LPL-GPCRs as conditional DAMPs and conditional DAMP receptors as a paradigm shift to the widely accepted classical DAMP and DAMP receptor model. Recent Advances: The aberrant levels of LPLs and GPCRs activate pro-inflammatory signal transduction pathways, trigger innate immune response and lead to tissue oxidative and inflammatory injury. CRITICAL ISSUES: Classical DAMPs model specify only the endogenous metabolites that are released from damaged/ dying cells as DAMPs but fails to identify elevated endogenous metabolites secreted from viable/ live cells during pathologies as DAMPs...
March 22, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28314215/a-metabolomic-approach-shows-sphingosine-1-phosphate-and-lysophospholipids-as-mediators-of-the-therapeutic-effect-of-liver-growth-factor-in-emphysema
#2
A Navarrete, F J Rupérez, T O Mendes, S Pérez-Rial, A Girón-Martínez, R Terrón-Expósito, J J Díaz-Gil, G Peces-Barba, C Barbas, A García
Tobacco smoke exposure is the principal cause of lung tissue destruction, which in turn results in emphysema that leads into shortness of breath. Liver growth factor (LGF, a cell and tissue regenerating factor with therapeutic activity in several organs) has antifibrotic and antioxidant properties that could be useful to promote lung tissue regenerating capacity in damaged lungs. The current study has examined differences in metabolite profiles (fingerprints) of plasma from mice (strain C57BL/6J, susceptible to develop emphysema) exposed to tobacco smoke during six months...
February 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28295356/red-blood-cell-metabolic-responses-to-refrigerated-storage-rejuvenation-and-frozen-storage
#3
Angelo D'Alessandro, Alan D Gray, Zbignew M Sczcepiorkowski, Kirk Hansen, Louise H Herschel, Larry J Dumont
BACKGROUND: Storage of red blood cells (RBCs) under blood bank conditions promotes metabolic modulation within the RBC. This "metabolic storage lesion" may affect the quality and safety of the transfused RBCs. The aim of this study is to determine the metabolic changes in stored RBCs over 42 days of routine storage followed by a US Food and Drug Administration-approved method of rejuvenation, freezing, and preparation for transfusion. STUDY DESIGN AND METHODS: We exploited a mass spectrometry-based metabolomics approach to monitor 42-day-stored citrate phosphate dextrose/AS-1 RBCs (n = 29) that were rejuvenated, glycerolized and frozen, then thawed and deglycerolized, and held for 24 hours at 1 to 6ºC in saline-glucose...
March 10, 2017: Transfusion
https://www.readbyqxmd.com/read/28292367/myofibroblast-mediated-contraction
#4
Wae M Al Kattan, Seham F Alarfaj, Bayan M Alnooh, Hadeel F Alsaif, Hayfa S Alabdul Karim, Noha M Al-Qattan, Mohammad M Al-Qattan, Amel A F El-Sayed
Myofibroblast-mediated contraction is viewed as a cycle of four steps. The first step is stimulation of myofibroblasts by lysophospholipids leading to the activation of G proteins and ending with contraction of the actin-myosin complex. The next step is the transmission of the intracellular contractile force at the focal adhesions of myofibroblasts; a step that involves talin, vinculin, paxillin, Hic-5, and the integrin receptors. In the third step, fibronectin will act as the extracellular link between the integrin receptors and the extracellular collagen...
January 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28279838/modulation-of-sphingosine-1-phosphate-in-inflammatory-bowel-disease
#5
REVIEW
Laurent Peyrin-Biroulet, Ronald Christopher, Dominic Behan, Cheryl Lassen
Inflammatory bowel diseases (IBD), including ulcerative colitis and Crohn's disease, involve an inappropriate immune reaction in the digestive tract, causing a variety of disabling symptoms. The advent of monoclonal antibodies (anti-tumor necrosis factor, anti-integrin, anti-interleukin -23) has revolutionized IBD management. Nevertheless, these agents, with potential for immunogenicity, are associated with high rates of response loss and disease relapse over time. They are also associated with high production costs...
March 6, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28204735/effect-of-diets-with-different-energy-and-lysophospholipids-levels-on-performance-nutrient-metabolism-and-body-composition-in-broilers
#6
P Y Zhao, I H Kim
No abstract text is available yet for this article.
February 16, 2017: Poultry Science
https://www.readbyqxmd.com/read/28202712/ribeye-b-domain-binds-to-lipid-components-of-synaptic-vesicles-in-an-nad-h-dependent-redox-sensitive-manner
#7
Karin Schwarz, Frank Schmitz
Synaptic ribbons are needed for fast and continuous exocytosis in ribbon synapses. RIBEYE is a main protein component of synaptic ribbons and is necessary to build the synaptic ribbon. RIBEYE consists of a unique A-domain and a carboxyterminal B-domain, which binds NAD(H). Within the presynaptic terminal, the synaptic ribbons are in physical contact with large numbers of synaptic vesicle (SV)s. How this physical contact between ribbons and synaptic vesicles is established at a molecular level is not well understood...
March 20, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28202545/the-basis-for-acyl-specificity-in-the-tafazzin-reaction
#8
Michael Schlame, Yang Xu, Mindong Ren
Tafazzin is a mitochondrial enzyme that transfers fatty acids from phospholipids to lysophospholipids. Mutations in tafazzin cause abnormal molecular species of cardiolipin and the clinical phenotype of Barth syndrome. However, the mechanism by which tafazzin creates acyl specificity has been controversial. We have shown that the lipid phase state can produce acyl specificity in the tafazzin reaction but others have reported that tafazzin itself carries enzymatic specificity. To resolve this issue, we replicated and expanded the controversial experiments, i...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28201632/effects-of-lysophospholipid-supplementation-to-lower-nutrient-diets-on-growth-performance-intestinal-morphology-and-blood-metabolites-in-broiler-chickens
#9
W Boontiam, B Jung, Y Y Kim
No abstract text is available yet for this article.
March 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28187380/biomimetic-nanoassemblies-of-1-o-octodecyl-2-conjugated-linoleoyl-sn-glycero-3-phosphatidyl-gemcitabine-with-phospholipase-a2-triggered-degradation-for-the-treatment-of-cancer
#10
Jing Zuo, Li Tong, Lina Du, Ming Yang, Yiguang Jin
Phospholipids are important biomolecules with strong self-assembling ability to form biomembranes or liposomes. However, biomimetic prodrugs of phospholipids are not well known, including their self-assembling behavior at the air/water interface or in aqueous media. Here we design and prepare a biomimetic phospholipid-like amphiphilic prodrug, 1-O-octodecyl-2-conjugated linoleoyl-sn-glycero-3-phosphatidyl gemcitabine (OLGPG). After spreading at the air/water interface, it formed Langmuir monolayers. Stable nanoassemblies were obtained based on molecular self-assembly after OLGPG was injected in water...
April 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28181299/phospholipid-localization-implies-microglial-morphology-and-function-via-cdc42-in-vitro
#11
Kyohei Tokizane, Hiroyuki Konishi, Kumiko Makide, Hiroki Kawana, Shinichi Nakamuta, Kozo Kaibuchi, Tomohiko Ohwada, Junken Aoki, Hiroshi Kiyama
Under a quiescent state, microglia exhibit a ramified shape, rather than the amoeboid-like morphology following injury or inflammation. The manipulation of microglial morphology in vitro has not been very successful, which has impeded the progress of microglial studies. We demonstrate that lysophosphatidylserine (LysoPS), a kind of lysophospholipids, rapidly and substantially alters the morphology of primary cultured microglia to an in vivo-like ramified shape in a receptor independent manner. This mechanism is mediated by Cdc42 activity...
February 9, 2017: Glia
https://www.readbyqxmd.com/read/28178978/enhanced-extracellular-production-of-recombinant-proteins-in-escherichia-coli-by-co-expression-with-bacillus-cereus-phospholipase-c
#12
Lingqia Su, Qi Jiang, Lingang Yu, Jing Wu
BACKGROUND: Our laboratory has reported a strategy for improving the extracellular production of recombinant proteins through co-expression with Thermobifida fusca cutinase, which increases membrane permeability via its phospholipid hydrolysis activity. However, the foam generated by the lysophospholipid product makes the fermentation process difficult to control in a fermentor. Phospholipase C (PLC) catalyzes the hydrolysis of phospholipids to produce sn1,2-diacylglycerides and organic phosphate, which do not induce foam formation...
February 8, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28168573/increasing-cocoa-butter-like-lipid-production-of-saccharomyces-cerevisiae-by-expression-of-selected-cocoa-genes
#13
Yongjun Wei, Michael Gossing, David Bergenholm, Verena Siewers, Jens Nielsen
Cocoa butter (CB) extracted from cocoa beans mainly consists of three different kinds of triacylglycerols (TAGs), 1,3-dipalmitoyl-2-oleoyl-glycerol (POP, C16:0-C18:1-C16:0), 1-palmitoyl-3-stearoyl-2-oleoyl-glycerol (POS, C16:0-C18:1-C18:0) and 1,3-distearoyl-2-oleoyl-glycerol (SOS, C18:0-C18:1-C18:0), but CB supply is limited. Therefore, CB-like lipids (CBL, which are composed of POP, POS and SOS) are in great demand. Saccharomyces cerevisiae produces TAGs as storage lipids, which are also mainly composed of C16 and C18 fatty acids...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28161751/miltefosine-a-novel-internal-standard-approach-to-lysophospholipid-quantitation-using-lc-ms-ms
#14
A Ruth Godfrey, Lewis Jones, Mairead Davies, Rachel Townsend
Understanding and determining levels of lysophospholipids (LPLs) is of increasing interest to the bioanalytical community as they may be targeted for preparative removal as a matrix interference or as a lead substance as a biomarker of disease. Studies monitoring levels of LPLs have used a range of approaches for quantitation whereby those using an internal standard have used either deuterated analogues of the target LPL or alternative LPLs containing an odd number of carbon atoms within its chain, which can be expensive and difficult to distinguish with other LPLs, respectively...
February 4, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28143894/analysis-of-glycero-lysophospholipids-in-gastric-cancerous-ascites
#15
Shigenobu Emoto, Makoto Kurano, Kuniyuki Kano, Keisuke Matsusaki, Hiroharu Yamashita, Masako Nishikawa, Koji Igarashi, Hitoshi Ikeda, Junken Aoki, Joji Kitayama, Yutaka Yatomi
Lysophosphatidic acid (LysoPA) has been proposed to be involved in the pathogenesis of various cancers. Moreover, glycero-lysophospholipids other than LysoPA are now emerging as novel lipid mediators. Therefore, we aimed to elucidate the possible involvement of glycero-lysophospholipids in the pathogenesis of gastric cancer by measuring glycero-LPLs, autotaxin, and phosphatidylserine-specific phospholipase A1 (PS-PLA1) in ascites obtained from patients with gastric cancer and those with cirrhosis (as a control)...
January 31, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28123411/targeting-lysophospholipid-signaling-as-a-therapeutic-approach-towards-improved-peripheral-nerve-regeneration
#16
Fabian Szepanowski, Bernd C Kieseier
No abstract text is available yet for this article.
November 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/28105254/disease-monitoring-of-hepatocellular-carcinoma-through-metabolomics
#17
REVIEW
Asem I Fitian, Roniel Cabrera
We elucidate major pathways of hepatocarcinogenesis and accurate diagnostic metabolomic biomarkers of hepatocellular carcinoma (HCC) identified by contemporary HCC metabolomics studies, and delineate a model HCC metabolomics study design. A literature search was carried out on Pubmed for HCC metabolomics articles published in English. All relevant articles were accessed in full text. Major search terms included "HCC", "metabolomics", "metabolomics", "metabonomic" and "biomarkers". We extracted clinical and demographic data on all patients and consolidated the lead candidate biomarkers, pathways, and diagnostic performance of metabolomic expression patterns reported by all studies in tables...
January 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28104445/the-sh3-domain-of-caskin1-binds-to-lysophosphatidic-acid-suggesting-a-direct-role-for-the-lipid-in-intracellular-signaling
#18
Kitti Koprivanacz, Orsolya Tőke, Balázs Besztercei, Tünde Juhász, László Radnai, Balázs Merő, Judith Mihály, Mária Péter, Gábor Balogh, László Vígh, László Buday, Károly Liliom
Src homology 3 or SH3 domains constitute one of the most common protein domains in signal transduction, generally characterized by their binding to proline-rich sequences on interacting signaling proteins. Caskin1, a scaffold protein regulating cortical actin filaments, enriched in neural synapses in mammals, has an atypical SH3 domain. Key aromatic residues necessary for ligand binding that are present in canonical SH3 domains are missing from Caskin1 SH3. In concordance, proline-rich interacting partner could not be identified yet...
January 16, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28100887/production-of-a-health-beneficial-food-emulsifier-by-enzymatic-partial-hydrolysis-of-phospholipids-obtained-from-the-head-of-autumn-chum-salmon
#19
A K M Azad Shah, Toshihiro Nagao, Hideyuki Kurihara, Koretaro Takahashi
Phospholipids and their partial hydrolysates, namely lysophospholipids (LPLs), have been widely used in food, pharmaceutical, and cosmetic products as highly efficient emulsifiers. This study was conducted to produce docosahexaenoic acid (DHA)-esterified LPLs by enzymatic modification of phospholipids obtained from the head of autumn chum salmon (Oncorhynchus keta). The emulsifying properties of the obtained LPLs were also evaluated. Two different types of substrates of salmon head phospholipids were prepared via silica gel and cold acetone precipitation...
February 1, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28100844/phospholipids-and-products-of-their-hydrolysis-as-dietary-preventive-factors-for-civilization-diseases
#20
Karol Parchem, Agnieszka Bartoszek
The results of numerous epidemiological studies indicate that phospholipids play an important role in the prevention of chronic diseases faced by contemporary society. Firstly, these compounds are responsible for the proper functioning of cell membranes, by ensuring liquidity and permeability, which is pivotal for normal activity of membrane proteins, including receptors. These mechanisms are at the core of prevention of cancer, autoimmune or neurological disorders. Secondly, structure and properties of phospholipids cause that they are highly available source of biologically active fatty acids...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
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