keyword
MENU ▼
Read by QxMD icon Read
search

Phosphatidic acid

keyword
https://www.readbyqxmd.com/read/27913097/effect-of-24-epibrassinolide-on-brassica-napus-alternative-respiratory-pathway-guard-cells-movements-and-phospholipid-signaling-under-salt-stress
#1
Michael Derevyanchuk, Sergii Kretynin, Oksana Iakovenko, Raisa Litvinovskaya, Vladimir Zhabinskii, Jan Martinec, Yaroslav Blume, Vladimir Khripach, Volodymyr Kravets
Using Brassica napus roots we observed statistically significant increase in alternative respiratory pathway in response to exogenous 24-epibrassinolide (EBL) under optimal conditions and salinity. Also we observed activation of phospholipid signaling under the same conditions in response to EBL by measuring levels of lipid second messengers - diacylglycerol (DAG) and phosphatidic acid (PA). We found that brassinosteroids cause closure of stomata in isolated leaf disks while inhibitors of alternative oxidase cancelled these effects...
November 29, 2016: Steroids
https://www.readbyqxmd.com/read/27909410/mechanosensitive-molecular-networks-involved-in-transducing-resistance-exercise-signals-into-muscle-protein-accretion
#2
REVIEW
Emil Rindom, Kristian Vissing
Loss of skeletal muscle myofibrillar protein with disease and/or inactivity can severely deteriorate muscle strength and function. Strategies to counteract wasting of muscle myofibrillar protein are therefore desirable and invite for considerations on the potential superiority of specific modes of resistance exercise and/or the adequacy of low load resistance exercise regimens as well as underlying mechanisms. In this regard, delineation of the potentially mechanosensitive molecular mechanisms underlying muscle protein synthesis (MPS), may contribute to an understanding on how differentiated resistance exercise can transduce a mechanical signal into stimulation of muscle accretion...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27906127/malaria-parasite-celtos-targets-the-inner-leaflet-of-cell-membranes-for-pore-dependent-disruption
#3
John R Jimah, Nichole D Salinas, Monica Sala-Rabanal, Nathaniel G Jones, L David Sibley, Colin G Nichols, Paul H Schlesinger, Niraj H Tolia
Apicomplexan parasites contain a conserved protein CelTOS that, in malaria parasites, is essential for traversal of cells within the mammalian host and arthropod vector. However, the molecular role of CelTOS is unknown because it lacks sequence similarity to proteins of known function. Here, we determined the crystal structure of CelTOS and discovered CelTOS resembles proteins that bind to and disrupt membranes. In contrast to known membrane disruptors, CelTOS has a distinct architecture, specifically binds phosphatidic acid commonly present within the inner leaflet of plasma membranes, and potently disrupts liposomes composed of phosphatidic acid by forming pores...
December 1, 2016: ELife
https://www.readbyqxmd.com/read/27895803/time-course-microarray-analysis-for-identifying-candidate-genes-involved-in-obesity-associated-pathological-changes-in-the-mouse-colon
#4
Yun Jung Bae, Sung-Eun Kim, Seong Yeon Hong, Taesun Park, Sang Gyu Lee, Myung-Sook Choi, Mi-Kyung Sung
BACKGROUND: Obesity is known to increase the risk of colorectal cancer. However, mechanisms underlying the pathogenesis of obesity-induced colorectal cancer are not completely understood. The purposes of this study were to identify differentially expressed genes in the colon of mice with diet-induced obesity and to select candidate genes as early markers of obesity-associated abnormal cell growth in the colon. METHODS: C57BL/6N mice were fed normal diet (11% fat energy) or high-fat diet (40% fat energy) and were euthanized at different time points...
2016: Genes & Nutrition
https://www.readbyqxmd.com/read/27891502/diacylglycerol-kinases-in-t-cell-tolerance-and-effector-function
#5
REVIEW
Shelley S Chen, Zhiming Hu, Xiao-Ping Zhong
Diacylglycerol kinases (DGKs) are a family of enzymes that regulate the relative levels of diacylglycerol (DAG) and phosphatidic acid (PA) in cells by phosphorylating DAG to produce PA. Both DAG and PA are important second messengers cascading T cell receptor (TCR) signal by recruiting multiple effector molecules, such as RasGRP1, PKCθ, and mTOR. Studies have revealed important physiological functions of DGKs in the regulation of receptor signaling and the development and activation of immune cells. In this review, we will focus on recent progresses in our understanding of two DGK isoforms, α and ζ, in CD8 T effector and memory cell differentiation, regulatory T cell development and function, and invariant NKT cell development and effector lineage differentiation...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27888240/topological-organisation-of-the-phosphatidylinositol-4-5-bisphosphate-phospholipase-c-resynthesis-cycle-pitps-bridge-the-er-pm-gap
#6
REVIEW
Shamshad Cockcroft, Padinjat Raghu
Phospholipase C (PLC) is a receptor-regulated enzyme that hydrolyses phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) at the plasma membrane (PM) triggering three biochemical consequences, the generation of soluble inositol 1,4,5-trisphosphate (IP3), membrane-associated diacylglycerol (DG) and the consumption of PM PI(4,5)P2 Each of these three signals triggers multiple molecular processes impacting key cellular properties. The activation of PLC also triggers a sequence of biochemical reactions, collectively referred to as the PI(4,5)P2 cycle that culminates in the resynthesis of this lipid...
December 1, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27883027/disturbed-phospholipid-homeostasis-in-endoplasmic-reticulum-initiates-tri-o-cresyl-phosphate-induced-delayed-neurotoxicity
#7
Li Zhu, Pan Wang, Ying-Jian Sun, Ming-Yuan Xu, Yi-Jun Wu
Tri-o-cresyl phosphate (TOCP) is a widely used organophosphorus compound, which can cause a neurodegenerative disorder, i.e., organophosphate-induced delayed neurotoxicity (OPIDN). The biochemical events in the initiation of OPIDN were not fully understood except for the essential inhibition of neuropathy target esterase (NTE). NTE, located in endoplasmic reticulum (ER), catalyzes the deacylation of phosphatidylcholine (PC) and lysophosphatidylcholine (LPC) to glycerophosphocholine (GPC). The present study aims to study the changes of ER phospholipids profile as well as levels of important intermediates of phospholipid synthesis such as diacylglycerol (DAG) and phosphatidic acid (PA) at the initiation stage of OPIDN...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27872488/pld1-regulates-adipogenic-differentiation-through-mtor-irs-1-phosphorylation-at-serine-636-639
#8
Hae-In Song, Mee-Sup Yoon
Phospholipase D1 (PLD1) plays a known role in several differentiation processes, but its role in adipogenic differentiation remains unknown. In the present study, we identified PLD1 as a negative regulator of adipogenic differentiation. We showed that PLD activity was downregulated by both 3-Isobutyl-1-methylxanthine (IBMX) and insulin upon induction of differentiation in 3T3-L1 adipogenic cells. In line with this observation, PLD activity decreased in both high fat diet (HFD)-fed mice and ob/ob mice. We also found that differentiation of 3T3-L1 preadipocytes was enhanced by the depletion of PLD1 levels or inhibition of PLD1 activity by VU0155069, a PLD1-specific inhibitor...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27864640/arabidopsis-phospholipase-d-alpha-1-derived-phosphatidic-acid-regulates-microtubule-organization-and-cell-development-under-microtubule-interacting-drugs-treatment
#9
Qun Zhang, Yana Qu, Qing Wang, Ping Song, Peipei Wang, Qianru Jia, Jinhe Guo
Phospholipase D (PLD) and its product phosphatidic acid (PA) are emerging as essential regulators of cytoskeleton organization in plants. However, the underlying molecular mechanisms of PA-mediated microtubule reorganization in plants remain largely unknown. In this study, we used pharmacological and genetic approaches to analyze the function of Arabidopsis thaliana PLDα1 in the regulation of microtubule organization and cell development in response to microtubule-affecting drugs. Treatment with the microtubule-stabilizing drug paclitaxel resulted in less growth inhibition and decreased rightward slant of roots, longitudinal alignment of microtubules, and enhanced length of hypocotyl epidermal cells in the pldα1 mutant, the phenotype of which was rescued by exogenous application of PA...
November 18, 2016: Journal of Plant Research
https://www.readbyqxmd.com/read/27864277/molecular-characterization-of-ghpld%C3%AE-1-and-its-relationship-with-secondary-cell-wall-thickening-in-cotton-fibers
#10
Kai Tang, Jin-Yuan Liu
Phospholipase D (PLD) hydrolyzes phospholipids to generate a free polar head group (e.g., choline) and a second messenger phosphatidic acid and plays diverse roles in plant growth and development, including seed germination, leaf senescence, root hair growth, and hypocotyl elongation. However, the function of PLD in cotton remains largely unexplored. Here, the comprehensive molecular characterization of GhPLDα1 was explored with its role in upland cotton (Gossypium hirsutum) fiber development. The GhPLDα1 gene was cloned successfully, and a sequence alignment showed that GhPLDα1 contains one C2 domain and two HKD (HxKxxxxD) domains...
November 17, 2016: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/27848911/phospholipase-d-activity-couples-plasma-membrane-endocytosis-with-retromer-dependent-recycling
#11
Rajan Thakur, Aniruddha Panda, Elise Coessens, Nikita Raj, Shweta Yadav, Sruthi Balakrishnan, Qifeng Zhang, Plamen Georgiev, Bishal Basak, Renu Pasricha, Michael Jo Wakelam, Nicholas T Ktistakis, Padinjat Raghu
During illumination, the light-sensitive plasma membrane (rhabdomere) of Drosophila photoreceptors undergoes turnover with consequent changes in size and composition. However, the mechanism by which illumination is coupled to rhabdomere turnover remains unclear. We find that photoreceptors contain a light-dependent phospholipase D (PLD) activity. During illumination, loss of PLD resulted in an enhanced reduction in rhabdomere size, accumulation of Rab7 positive, rhodopsin1-containing vesicles (RLVs) in the cell body and reduced rhodopsin protein...
November 16, 2016: ELife
https://www.readbyqxmd.com/read/27843094/metabolomics-predicts-neuroimaging-characteristics-of-transient-ischemic-attack-patients
#12
Francisco Purroy, Serafi Cambray, Gerard Mauri-Capdevila, Mariona Jové, Jordi Sanahuja, Joan Farré, Ikram Benabdelhak, Jessica Molina-Seguin, Laura Colàs-Campàs, Robert Begue, M Isabel Gil, Reinald Pamplona, Manuel Portero-Otín
BACKGROUND: Neuroimaging is essential for the diagnosis and prognosis of transient ischemic attack (TIA). The discovery of a plasmatic biomarker related to neuroimaging findings is of enormous interest because, despite its relevance, magnetic resonance diffusion weighted imaging (DWI) is not always available in all hospitals that attend to TIA patients. METHODS: Metabolomic analyses were performed by liquid chromatography coupled to mass spectrometry in order to establish the metabolomic patterns of positive DWI, DWI patterns and acute ischemic lesion volumes...
November 9, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27834677/phosphorylation-of-dgk1-diacylglycerol-kinase-by-casein-kinase-ii-regulates-phosphatidic-acid-production-in-saccharomyces-cerevisiae
#13
Yixuan Qiu, Azam Hassaninasab, Gil-Soo Han, George M Carman
In the yeast Saccharomyces cerevisiae, Dgk1 diacylglycerol (DAG) kinase catalyzes the CTP-dependent phosphorylation of DAG to form phosphatidic acid (PA). The enzyme in conjunction with Pah1 PA phosphatase controls the levels of PA and DAG for the synthesis of triacylglycerol and membrane phospholipids, the growth of the nuclear/endoplasmic reticulum membrane, and the formation of lipid droplets. Little is known about how DAG kinase activity is regulated by posttranslational modification. In this work, we examined the phosphorylation of Dgk1 DAG kinase by casein kinase II (CKII)...
November 10, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27829218/cellular-effects-of-fluorodeoxyglucose-global-changes-in-the-lipidome-and-alteration-in-intracellular-transport
#14
Simona Kavaliauskiene, Maria Lyngaas Torgersen, Anne Berit Dyve Lingelem, Tove Irene Klokk, Tuulia Lintonen, Helena Simolin, Kim Ekroos, Tore Skotland, Kirsten Sandvig
2-fluoro-2-deoxy-D-glucose (FDG), labeled with 18F radioisotope, is the most common imaging agent used for positron emission tomography (PET) in oncology. However, little is known about the cellular effects of FDG. Another glucose analogue, 2-deoxy-D-glucose (2DG), has been shown to affect many cellular functions, including intracellular transport and lipid metabolism, and has been found to improve the efficacy of cancer chemotherapeutic agents in vivo. Thus, in the present study, we have investigated cellular effects of FDG with the focus on changes in cellular lipids and intracellular transport...
November 4, 2016: Oncotarget
https://www.readbyqxmd.com/read/27825105/mir-184-exhibits-angiostatic-properties-via-regulation-of-akt-and-vegf-signaling-pathways
#15
Jong Kook Park, Han Peng, Wending Yang, Julia Katsnelson, Olga Volpert, Robert M Lavker
Corneal avascularity is critical for achieving transparency necessary for proper transmission of light to the lens and visual acuity. Although much is known about angiogenesis and angiostasis, the precise regulation of these processes in the cornea is unclear. MicroRNA (miR)-184, the most abundant corneal epithelial miRNA, has been suggested to function in corneal angiostasis by altering VEGF signaling; however, the mechanism(s) underlying this regulation have not been addressed. Using a combination of in vitro and in vivo assays to evaluate angiogenesis, we demonstrated that human limbal epithelial keratinocytes (HLEKs) engineered to overexpress miR-184 secreted lower amounts of angiogenic mitogens...
October 7, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27815179/characterization-of-molecular-properties-and-regulatory-pathways-of%C3%A2-crustinpm1-and-crustinpm7-from-the-black-tiger-shrimp-penaeus-monodon
#16
Sopacha Arayamethakorn, Premruethai Supungul, Anchalee Tassanakajon, Kuakarun Krusong
CrustinPm1 and crustinPm7 are the two most abundant isoforms of crustins identified from the hemocytes of the black tiger shrimp, Penaeus monodon. CrustinPm1 inhibits only Gram-positive bacteria, while crustinPm7 acts against both Gram-positive and Gram-negative bacteria. This work aims to characterize the molecular properties of recombinant crustinPm1 and crustinPm7, and the regulatory pathways of these two crustins. Circular dichroism spectroscopy revealed that crustinPm1 contained 40.81% alpha-helix and 22...
February 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/27812010/membrane-glycerolipidome-of-soybean-root-hairs-and-its-response-to-nitrogen-and-phosphate-availability
#17
Fang Wei, Brian Fanella, Liang Guo, Xuemin Wang
Root hairs are tubular extensions of specific root epidermal cells important in plant nutrition and water absorption. To determine membrane glycerolipids in root hairs and roots may differ, as well as their respective response to nutrient availability, this study analyzed the membrane glycerolipid species in soybean root hairs and in roots stripped of root hairs, and their response to nitrogen (N) and phosphate (Pi) supplementation. The ratio of phospholipids to galactolipids was 1.5 fold higher in root hairs than in stripped roots...
November 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27807900/lipid-composition-of-the-canine-sperm-plasma-membrane-as-markers-of-sperm-motility
#18
C F Lucio, M M Brito, Dsr Angrimani, Kra Belaz, D Morais, D Zampieri, Jda Losano, Meoa Assumpção, M Nichi, M N Eberlin, C I Vannucchi
The fatty acid composition of the sperm membrane is an important factor involved in the overall sperm quality, including motility. However, in the canine species, the exact composition of the plasma membrane is still unknown. Therefore, the purpose of this study was to evaluate the plasma membrane lipid composition of motile sperm cells and to compare it with asthenospermic samples, as an attempt to determine possible involvements of membrane lipids in dog sperm cell motility. The sperm-rich fraction of ten mature dogs was collected, and samples were subjected to density gradient centrifugation by Percoll(®) , in order to separate motile and asthenospermic samples...
November 3, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27803897/diacylglycerol-kinase-%C3%AE%C2%B5-properties-and-biological-roles
#19
REVIEW
Richard M Epand, Vincent So, William Jennings, Bijendra Khadka, Radhey S Gupta, Mathieu Lemaire
In mammals there are at least 10 isoforms of diacylglycerol kinases (DGK). All catalyze the phosphorylation of diacylglycerol (DAG) to phosphatidic acid (PA). Among DGK isoforms, DGKε has several unique features. It is the only DGK isoform with specificity for a particular species of DAG, i.e., 1-stearoyl-2-arachidonoyl glycerol. The smallest of all known DGK isoforms, DGKε, is also the only DGK devoid of a regulatory domain. DGKε is the only DGK isoform that has a hydrophobic segment that is predicted to form a transmembrane helix...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27803633/eight-weeks-of-phosphatidic-acid-supplementation-in-conjunction-with-resistance-training-does-not-differentially-affect-body-composition-and-muscle-strength-in-resistance-trained-men
#20
Thomas L Andre, Joshua J Gann, Sarah K McKinley-Barnard, Joon J Song, Darryn S Willoughby
This study attempted to determine the effects of eight weeks of resistance training (RT) combined with phosphatidic acid (PA) supplementation at a dose of either 250 mg or 375 mg on body composition and muscle size and strength. Twenty-eight resistance-trained men were randomly assigned to ingest 375 mg [PA375 (n = 9)] or 250 mg [PA250 (n = 9)] of PA or 375 mg of placebo [PLC (n = 10)] daily for eight weeks with RT. Supplements were ingested 60 minutes prior to RT and in the morning on non-RT days. Participants' body composition, muscle size, and lower-body muscle strength were determined before and after training/supplementation...
September 2016: Journal of Sports Science & Medicine
keyword
keyword
11169
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"