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Lipid transfer protein

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https://www.readbyqxmd.com/read/29143394/bactericera-cockerelli-vitellogenin-6-like-a-vitellogenin-without-a-direct-reproductive-function
#1
F Ibanez, X Tang, C Tamborindeguy
Vitellogenin-like proteins are members of the large lipid transfer proteins, a family of proteins involved in reproduction, lipid circulation and immune defences. In this study, we identified a new Bactericera cockerelli vitellogenin-like (Vg-like) transcript, and named it BcVg6-like based on its similarity to Acyrthosiphon pisum Vg6. In silico analyses predicted different conserved domains in BcVg6-like compared with the conventional Ba. cockerelli vitellogenin, BcVg1-like, previously described by our research group...
November 16, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/29141072/association-of-cetp-gene-variants-with-risk-for-vascular-and-nonvascular-diseases-among-chinese-adults
#2
Iona Y Millwood, Derrick A Bennett, Michael V Holmes, Ruth Boxall, Yu Guo, Zheng Bian, Ling Yang, Sam Sansome, Yiping Chen, Huaidong Du, Canqing Yu, Alex Hacker, Dermot F Reilly, Yunlong Tan, Michael R Hill, Junshi Chen, Richard Peto, Hongbing Shen, Rory Collins, Robert Clarke, Liming Li, Robin G Walters, Zhengming Chen
Importance: Increasing levels of high-density lipoprotein (HDL) cholesterol through pharmacologic inhibition of cholesteryl ester transfer protein (CETP) is a potentially important strategy for prevention and treatment of cardiovascular disease (CVD). Objective: To use genetic variants in the CETP gene to assess potential risks and benefits of lifelong lower CETP activity on CVD and other outcomes. Design, Setting, and Participants: This prospective biobank study included 151 217 individuals aged 30 to 79 years who were enrolled from 5 urban and 5 rural areas of China from June 25, 2004, through July 15, 2008...
November 15, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/29138808/the-biology-and-function-of-extracellular-vesicles-in-nasopharyngeal-carcinoma-review
#3
Bo You, Ying Shan, Lili Bao, Jing Chen, Liu Yang, Qicheng Zhang, Wei Zhang, Zhenxin Zhang, Jie Zhang, Si Shi, Yiwen You
Extracellular vesicles are a heterogeneous group of membrane-enclosed vesicles, which play an important role in intercellular communication. Increasing number of studies have shown that tumor-derived extracellular vesicles might be involved in the transfer of oncogenic cargo (proteins, lipids, messenger RNA, microRNA, non-coding RNAs and DNA) through which cancer cells could shape the tumor microenvironment and influence tumor progression. Nasopharyngeal carcinoma-derived extracellular vesicles have also reported to facilitate tumor proliferation, metastasis and immune escape...
November 10, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29125288/uptake-translocation-and-biotransformation-of-organophosphorus-esters-in-wheat-triticum-aestivum-l
#4
Weining Wan, Honglin Huang, Jitao Lv, Ruixia Han, Shuzhen Zhang
The uptake, translocation and biotransformation of organophosphate esters (OPEs) by wheat (Triticum aestivum L.) were investigated by a hydroponic experiment. The results demonstrated that OPEs with higher hydrophobicity were more easily taken up by roots, and OPEs with lower hydrophobicity were more liable to be translocated acropetally. A total of 43 metabolites including dealkylated, oxidatively dechlorinated, hydroxylated, methoxylated, and glutathione- and glucuronide- conjugated products were detected derived from eight OPEs, with di-esters formed by direct dealkylation from the parent tri-esters as the major products, followed with hydroxylated tri-esters...
November 10, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29123177/liprotides-kill-cancer-cells-by-disrupting-the-plasma-membrane
#5
Henriette S Frislev, Theresa Louise Boye, Jesper Nylandsted, Daniel Otzen
HAMLET (human α-lactalbumin made lethal to tumour cells) is a complex of α-lactalbumin (aLA) and oleic acid (OA) which kills transformed cells, while leaving fully differentiated cells largely unaffected. Other protein-lipid complexes show similar anti-cancer potential. We call such complexes liprotides. The cellular impact of liprotides, while intensely investigated, remains unresolved. To address this, we report on the cell-killing mechanisms of liprotides prepared by incubating aLA with OA for 1 h at 20 or 80 °C (lip20 and lip80, respectively)...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29123032/pregnane-x-receptor-promotes-ethanol-induced-hepatosteatosis-in-mice
#6
Sora Choi, Prince Neequaye, Samuel W French, Frank J Gonzalez, Maxwell A Gyamfi
The pregnane X receptor (PXR, NR1I2) is a xenobiotic-sensing nuclear receptor that modulates the metabolic response to drugs and toxic agents. Both PXR activation and deficiency promote hepatic triglyceride accumulation, a hallmark feature of alcoholic liver disease (ALD). However, the molecular mechanism of PXR-mediated activation of ethanol (EtOH)-induced steatosis is unclear. Here, using male wild type (WT) and Pxr-null mice we examined PXR-mediated regulation of chronic EtOH-induced hepatic lipid accumulation and hepatotoxicity...
November 9, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29122817/apo-a-i-apolipoprotein-a-i-vascular-gene-therapy-provides-durable-protection-against-atherosclerosis-in-hyperlipidemic-rabbits
#7
Bradley K Wacker, Nagadhara Dronadula, Lianxiang Bi, Alexis Stamatikos, David A Dichek
OBJECTIVE: Gene therapy that expresses apo A-I (apolipoprotein A-I) from vascular wall cells has promise for preventing and reversing atherosclerosis. Previously, we reported that transduction of carotid artery endothelial cells with a helper-dependent adenoviral (HDAd) vector expressing apo A-I reduced early (4 weeks) fatty streak development in fat-fed rabbits. Here, we tested whether the same HDAd could provide long-term protection against development of more complex lesions. APPROACH AND RESULTS: Fat-fed rabbits (n=25) underwent bilateral carotid artery gene transfer, with their left and right common carotids randomized to receive either a control vector (HDAdNull) or an apo A-I-expressing vector (HDAdApoAI)...
November 9, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29122679/extracellular-vesicles-novel-mediator-for-cell-to-cell-communications-in-liver-pathogenesis
#8
REVIEW
Pradip B Devhare, Ratna B Ray
Extracellular vesicles (EVs) are membrane derived nanometer-sized vesicles. EVs are released by normal, diseased, and transformed cells in vitro and in vivo, and carry lipids, proteins, mRNAs, non-coding RNAs, and even DNA out of cells. Transferring biological information via EVs to neighboring cells and inter-cellular communication not only maintain physiological functions, but also involve in the pathogenesis of several diseases, including cancer. The aim of this review is to discuss the emerging role of EVs in viral hepatitis, non-alcoholic or alcoholic liver disease and liver cancers...
November 10, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29122396/-cannabis-and-crossed-allergy-with-food
#9
REVIEW
M Drouet, A Hoppe, A S Moreau, J C Bonneau, J M Leclere, J Le Sellin
Cannabis use has increased over the last decade. At the same time, we see cannabis allergies appearing, ranging from simple rhinoconjunctivitis to anaphylactic-type reactions, some of which are severe since fatal cases have been described, but we also see allergic-induced food allergies cross-linked in the family of lipid transfer proteins (LTP). Indeed, cannabis contains an LTP called Can s 3. The LT are very widespread in the vegetable kingdom and are present in many vegetables and fruits. LTPs have a similar chemical structure and therefore cross-allergy is common...
November 6, 2017: Revue de Pneumologie Clinique
https://www.readbyqxmd.com/read/29118738/monitoring-of-dual-crispr-cas9-mediated-steroidogenic-acute-regulatory-protein-gene-deletion-and-cholesterol-accumulation-using-high-resolution-fluorescence-in-situ-hybridization-in-a-single-cell
#10
Jinwoo Lee, Colin Jefcoate
Recent advances in fluorescence microscopy, coupled with CRISPR/Cas9 gene editing technology, provide opportunities for understanding gene regulation at the single-cell level. The application of direct imaging shown here provides an in situ side-by-side comparison of CRISPR/Cas9-edited cells and adjacent unedited cells. We apply this methodology to the steroidogenic acute regulatory protein (StAR) gene in Y-1 adrenal cells and MA-10 testis cells. StAR is a gatekeeper protein that controls the access of cholesterol from the cytoplasm to the inner mitochondria...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29105313/immunological-changes-induced-in-peach-allergy-patients-with-systemic-reactions-by-pru-p-3-sublingual-immunotherapy
#11
Francisca Palomares, Francisca Gomez, Gador Bogas, Campo Paloma, James Richard Perkins, A Diaz-Perales, Maria José Rodriguez, Ana Prieto, Domingo Barber, María José Torres, Cristobalina Mayorga
SCOPE: Sublingual immunotherapy using peach extract enriched in Pru p 3 (Pru p 3-enriched-SLIT) brings a new perspective to treating patients with allergy to lipid transfer proteins. We evaluated the immunological changes induced by Pru p 3-enriched-SLIT during one year. METHODS AND RESULTS: Three groups were included: peach allergic patients who received Pru p 3-enriched-SLIT, peach allergic untreated patients and controls. Peripheral blood mononuclear cells were obtained before treatment and different time-points...
November 3, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29105202/the-clinical-relevance-of-lipid-transfer-protein
#12
Riccardo Asero, Marta Piantanida, Elena Pinter, Valerio Pravettoni
Despite a huge number of studies, many aspects of the lipid transfer protein (LTP)-syndrome, the most frequent primary food allergy in Mediterranean countries, remain unclear. Its peculiar geographical distribution, along with the extreme variability of its clinical expression make this type of food allergy something unique in the panorama of IgE-mediated food-induced allergic reactions. The present review article tried to summarize the current knowledge about the most important aspects of LTP sensitization and allergy, along with the importance of positive and negative co-factors in the clinical expression of the syndrome as well as the issues regarding the cross-reactivity between LTPs present in botanically related and unrelated foods...
November 3, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29103916/effect-of-atorvastatin-cholesterol-ester-transfer-protein-inhibition-and-diabetes-mellitus-on-circulating-proprotein-subtilisin-kexin-type-9-and-lipoprotein-a-levels-in-patients-at-high-cardiovascular-risk
#13
Benoit J Arsenault, Francine Petrides, Fatiha Tabet, Weihang Bao, G Kees Hovingh, S Matthijs Boekholdt, Stéphane Ramin-Mangata, Olivier Meilhac, David DeMicco, Kerry-Anne Rye, David D Waters, John J P Kastelein, Philip Barter, Gilles Lambert
BACKGROUND: Proprotein subtilisin kexin type 9 (PCSK9) and lipoprotein (a) [Lp(a)] levels are causative risk factors for coronary heart disease. OBJECTIVES: The objective of the study was to determine the impact of lipid-lowering treatments on circulating PCSK9 and Lp(a). METHODS: We measured PCSK9 and Lp(a) levels in plasma samples from Investigation of Lipid Level Management to Understand its Impact in Atherosclerotic Events trial patients with coronary heart disease and/or type II diabetes (T2D) mellitus...
October 12, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29093267/loss-of-mir-141-200c-ameliorates-hepatic-steatosis-and-inflammation-by-reprogramming-multiple-signaling-pathways-in-nash
#14
Melanie Tran, Sang-Min Lee, Dong-Ju Shin, Li Wang
Accumulation of lipid droplets and inflammatory cell infiltration is the hallmark of nonalcoholic steatohepatitis (NASH). The roles of noncoding RNAs in NASH are less known. We aim to elucidate the function of miR-141/200c in diet-induced NASH. WT and miR-141/200c-/- mice were fed a methionine and choline deficient (MCD) diet for 2 weeks to assess markers of steatosis, liver injury, and inflammation. Hepatic miR-141 and miR-200c RNA levels were highly induced in human patients with NASH fatty liver and in WT MCD mice...
November 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/29091046/overexpression-of-cypin-alters-dendrite-morphology-single-neuron-activity-and-network-properties-via-distinct-mechanisms
#15
Ana Rodriguez, Kate O'Neill, Przemyslaw Swiatkowski, Mihir V Patel, Bonnie Lynne Firestein
OBJECTIVE: This study investigates the effect that overexpression of cytosolic PSD-95 interactor (cypin), a regulator of synaptic PSD-95 protein localization and a core regulator of dendrite branching, exerts on the electrical activity of rat hippocampal neurons and networks. APPROACH: We cultured rat hippocampal neurons and used lipid-mediated transfection and lentiviral gene transfer to achieve high levels of cypin or cypin mutant (cypinΔPDZ; PSD-95 non-binding) expression cellularly and network-wide, respectively...
November 1, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29089042/membrane-dynamics-and-organelle-biogenesis-lipid-pipelines-and-vesicular-carriers
#16
EDITORIAL
Christopher J Stefan, William S Trimble, Sergio Grinstein, Guillaume Drin, Karin Reinisch, Pietro De Camilli, Sarah Cohen, Alex M Valm, Jennifer Lippincott-Schwartz, Tim P Levine, David B Iaea, Frederick R Maxfield, Clare E Futter, Emily R Eden, Delphine Judith, Alexander R van Vliet, Patrizia Agostinis, Sharon A Tooze, Ayumu Sugiura, Heidi M McBride
Discoveries spanning several decades have pointed to vital membrane lipid trafficking pathways involving both vesicular and non-vesicular carriers. But the relative contributions for distinct membrane delivery pathways in cell growth and organelle biogenesis continue to be a puzzle. This is because lipids flow from many sources and across many paths via transport vesicles, non-vesicular transfer proteins, and dynamic interactions between organelles at membrane contact sites. This forum presents our latest understanding, appreciation, and queries regarding the lipid transport mechanisms necessary to drive membrane expansion during organelle biogenesis and cell growth...
October 31, 2017: BMC Biology
https://www.readbyqxmd.com/read/29081510/isolation-and-characterization-of-urinary-extracellular-vesicles-implications-for-biomarker-discovery
#17
REVIEW
Michael L Merchant, Ilse M Rood, Jeroen K J Deegens, Jon B Klein
Urine is a valuable diagnostic medium and, with the discovery of urinary extracellular vesicles, is viewed as a dynamic bioactive fluid. Extracellular vesicles are lipid-enclosed structures that can be classified into three categories: exosomes, microvesicles (or ectosomes) and apoptotic bodies. This classification is based on the mechanisms by which membrane vesicles are formed: fusion of multivesicular bodies with the plasma membranes (exosomes), budding of vesicles directly from the plasma membrane (microvesicles) or those shed from dying cells (apoptotic bodies)...
December 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/29079699/substrate-analog-interaction-with-mcr-1-offers-insight-into-the-rising-threat-of-the-plasmid-mediated-transferable-colistin-resistance
#18
Pengcheng Wei, Guangji Song, Mengyang Shi, Yafei Zhou, Yang Liu, Jun Lei, Peng Chen, Lei Yin
Colistin is considered a last-resort antibiotic against most gram-negative bacteria. Recent discoveries of a plasmid-mediated, transferable colistin-resistance gene (mcr-1) on all continents have heralded the imminent emergence of pan-drug-resistant superbacteria. The inner-membrane protein MCR-1 can catalyze the transfer of phosphoethanolamine (PEA) to lipid A, resulting in colistin resistance. However, little is known about the mechanism, and few drugs exist to address this issue. We present crystal structures revealing the MCR-1 catalytic domain (cMCR-1) as a monozinc metalloprotein with ethanolamine (ETA) and d-glucose, respectively, thus highlighting 2 possible substrate-binding pockets in the MCR-1-catalyzed PEA transfer reaction...
October 27, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29078338/incv-a-ffat-motif-containing-chlamydia-protein-tethers-the-endoplasmic-reticulum-to-the-pathogen-containing-vacuole
#19
Rebecca Stanhope, Elizabeth Flora, Charlie Bayne, Isabelle Derré
Membrane contact sites (MCS) are zones of contact between the membranes of two organelles. At MCS, specific proteins tether the organelles in close proximity and mediate the nonvesicular trafficking of lipids and ions between the two organelles. The endoplasmic reticulum (ER) integral membrane protein VAP is a common component of MCS involved in both tethering and lipid transfer by binding directly to proteins containing a FFAT [two phenylalanines (FF) in an acidic tract (AT)] motif. In addition to maintaining cell homeostasis, MCS formation recently emerged as a mechanism by which intracellular pathogens hijack cellular resources and establish their replication niche...
November 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29076741/correlating-in-vitro-solubilization-and-supersaturation-profiles-with-in-vivo-exposure-for-lipid-based-formulations-of-the-cetp-inhibitor-cp-532-623
#20
Claire L McEvoy, Natalie L Trevaskis, Orlagh M Feeney, Glenn A Edwards, Michael E Perlman, Catherine M Ambler, Christopher J H Porter
Lipid based formulations (LBFs) are a promising formulation strategy for many poorly water-soluble drugs and have been shown previously to enhance the oral exposure of CP-532,623, an oral cholesteryl ester transfer protein inhibitor. In the current study, an in vitro lipid digestion model was used to probe the relationship between drug solubilization and supersaturation on in vitro dispersion and digestion of LBF containing long chain (LC) lipids and drug absorption in vivo. After in vitro digestion of LBF based on LC lipids, the proportion of CP-532,623 maintained in the solubilized state in the aqueous phase of the digest was highest in formulations containing Kolliphor RH 40, and in most cases outperformed equivalent formulations based on MC lipids...
November 9, 2017: Molecular Pharmaceutics
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