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phosphatidylserine

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https://www.readbyqxmd.com/read/28430795/igm-antibodies-to-oxidized-phosphatidylserine-as-protection-markers-in-cardiovascular-disease-among-60-year-olds
#1
Johan Frostegård, Jun Su, Sudhir Sing, Xiang Hua, Max Vikström, Karin Leander, Bruna Gigante, Ulf de Faire, Anna G Frostegård
OBJECTIVE: Phosphatidylserine is exposed on apoptotic cells and is prone to oxidation (OxPS). Here we analyze the association of IgM antibodies against OxPS (anti-OxPS) with the risk of cardiovascular disease (CVD). METHODS: Among sixty-year olds from Stockholm County in Sweden, previously screened for cardiovascular risk factors (2039 men, 2193 women), there were 210 incident CVD-cases identified during a 5-year follow-up. Using a nested case-control design, 622 age- and sex-matched controls were selected...
2017: PloS One
https://www.readbyqxmd.com/read/28427942/inhibitory-effects-of-ethyl-pyruvate-on-platelet-aggregation-and-phosphatidylserine-exposure
#2
Wenjin Li, Xinyu Yang, Minyuan Peng, Can Li, Guangfu Mu, Fangping Chen
Ethyl pyruvate (EP) is a stable lipophilic pyruvate derivative. Studies demonstrated that EP shows potent anti-oxidation, anti-inflammatory and anti-coagulant effects. Inflammation and coagulation are closely interacted with platelet activation. However, it is unclear whether EP has anti-platelet effects. Therefore, we investigated the anti-platelet effect of EP in this study in vitro. We found that EP inhibited agonists induced platelets aggregation, ATP release and adhesion to collagen. Flow cytometric analysis revealed that EP inhibited agonist induced platelets PAC-1 binding, as well as P-selectin and CD40L expression...
April 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28424507/heat-stress-in-dairy-cattle-alters-lipid-composition-of-milk
#3
Z Liu, V Ezernieks, J Wang, N Wanni Arachchillage, J B Garner, W J Wales, B G Cocks, S Rochfort
Heat stress, potentially affecting both the health of animals and the yield and composition of milk, occurs frequently in tropical, sub-tropical and temperate regions. A simulated acute heat stress experiment was conducted in controlled-climate chambers and milk samples collected before, during and after the heat challenge. Milk lipid composition, surveyed using LC-MS, showed significant changes in triacylglycerol (TAG) and polar lipid profiles. Heat stress (temperature-humidity index up to 84) was associated with a reduction in TAG groups containing short- and medium-chain fatty acids and a concomitant increase in those containing long-chain fatty acids...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422728/antimicrobial-peptides-with-selective-antitumor-mechanisms-prospect-for-anticancer-applications
#4
REVIEW
Berthony Deslouches, Y Peter Di
In the last several decades, there have been significant advances in anticancer therapy. However, the development of resistance to cancer drugs and the lack of specificity related to actively dividing cells leading to toxic side effects have undermined these achievements. As a result, there is considerable interest in alternative drugs with novel antitumor mechanisms. In addition to the recent approach using immunotherapy, an effective but much cheaper therapeutic option of pharmaceutical drugs would still provide the best choice for cancer patients as the first line treatment...
March 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417190/larkinella-harenae-sp-nov-isolated-from-korean-beach-soil
#5
Su-Jin Park, Jae-Jin Lee, Seung-Yeol Lee, Dae Sung Lee, Myung Kyum Kim, Leonid N Ten, Hee-Young Jung
A Gram-negative, short rod-shaped, gliding motile, and pale pink-pigmented bacterial strain, designated 15J9-9(T), was isolated from the soil of Iho Tewoo Beach, Jeju Island, Korea, and characterized taxonomically using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain 15J9-9(T) belonged to the family Cytophagaceae and was related to Larkinella bovis M2T2B15(T) (96.5% similarity), Larkinella arboricola Z0532(T) (95.3% similarity), and Larkinella insperata LMG 22510(T) (95...
April 17, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28414573/phosphatidylserine-translocation-after-radiosurgery-in-an-animal-model-of-arteriovenous-malformation
#6
Newsha Raoufi Rad, Lucinda S McRobb, Zhenjun Zhao, Vivienne S Lee, Nirav J Patel, Anas Sarwar Qureshi, Michael Grace, Joshua J McHattan, Jude V Amal Raj, Hong Duong, Saleh R Kashba, Marcus A Stoodley
Phosphatidylserine (PS) is asymmetrically distributed across the plasma membrane, located predominantly on the inner leaflet in healthy cells. Translocation of PS to the outer leaflet makes it available as a target for biological therapies. We examined PS translocation after radiosurgery in an animal model of brain arteriovenous malformation (AVM). An arteriovenous fistula was created by end-to-side anastomosis of the left external jugular vein to the common carotid artery in 6-week-old, male Sprague Dawley rats...
April 17, 2017: Radiation Research
https://www.readbyqxmd.com/read/28409836/platelet-derived-microparticles-regulates-thrombin-generation-via-phophatidylserine-in-abdominal-sepsis
#7
Yongzhi Wang, Su Zhang, Lingtao Luo, Eva Norström, Oscar Ö Braun, Matthias Mörgelin, Henrik Thorlacius
Sepsis is associated with dysfunctional coagulation. Recent data suggest that platelets play a role in sepsis by promoting neutrophil accumulation. Herein, we show that cecal ligation and puncture (CLP) triggered systemic inflammation, which is characterized by formation of IL-6 and CXC chemokines as well as neutrophil accumulation in the lung. Platelet depletion decreased neutrophil accumulation, IL-6 and CXC chemokines formation in septic lungs. Depletion of platelets increased peak thrombin formation and total thrombin generation (TG) in plasma from septic animals...
April 14, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28408641/gastroparesis-and-lipid-metabolism-associated-dysbiosis-in-wistar-kyoto-rats
#8
Julie E Dalziel, Karl Fraser, Wayne Young, Catherine M Lloyd-West, Shalome A Bassett, Nicole C Roy
Altered gastric accommodation and intestinal morphology suggests impaired gastrointestinal (GI) transit may occur in the Wistar Kyoto (WKY) rat strain, as common in stress-associated functional GI disorders. Because changes in GI transit can alter microbiota composition, we investigated whether these are altered in WKY rats compared with the resilient Sprague Dawley (SD) rats under basal conditions, and characterized plasma lipid and metabolite differences. Bead transit was tracked by X-ray imaging to monitor: gastric emptying (GE; 4 h), small intestine (SI) transit (9 h) and large intestine transit (12 h)...
April 13, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28406995/cell-based-evaluation-of-changes-in-coagulation-activity-induced-by-antineoplastic-drugs-for-the-treatment-of-acute-myeloid-leukemia
#9
Misae Tsunaka, Haruka Shinki, Takatoshi Koyama
Idarubicin (IDR), cytarabine (AraC), and tamibarotene (Am80) are effective for treatment of acute myeloid leukemia (AML). In acute leukemia, the incidence of venous thromboembolism or disseminated intravascular coagulation is associated with induction chemotherapy. Procoagulant effects of IDR, AraC, and Am80 were investigated in a vascular endothelial cell line EAhy926 and AML cell lines HL60 (AML M2), NB4 (AML M3, APL), and U937 (AML M5), focusing on tissue factor (TF), phosphatidylserine (PS), and thrombomodulin (TM)...
2017: PloS One
https://www.readbyqxmd.com/read/28406717/young-steady-state-rabbit-platelets-do-not-have-an-enhanced-capacity-to-expose-procoagulant-phosphatidylserine
#10
Emily C Reddy, Hong Wang, K W Annie Bang, Marian A Packham, Margaret L Rand
Platelets are recognized to be physiologically and functionally heterogeneous. An example of the diversity in reactivity is the formation of a distinct subpopulation of procoagulant phosphatidylserine (PS)-exposing platelets upon activation. Platelet age has been proposed as a determinant of platelet function, and it has been reported that young platelets are more reactive in exposing PS; using the same methodology of thiazole orange (TO) staining to distinguish young and old platelets, the percentages of procoagulant platelets produced by thrombin plus collagen activation of platelets from healthy controls were examined by flow cytometry...
April 13, 2017: Platelets
https://www.readbyqxmd.com/read/28402934/anti-cancer-activity-of-annexin-v-in-murine-melanoma-model-by-suppressing-tumor-angiogenesis
#11
Xuerui Zhang, Lina Huo, Haibo Jin, Yuheng Han, Jie Wang, Yanjun Zhang, Xinghuan Lai, Ziwei Le, Jing Zhang, Zichun Hua
Annexin V, a protein with high affinity to phosphatidylserine (PS) in a calcium dependent manner, has been widely used to probe apoptosis. Annexin V in inhibiting engulfment of apoptotic cells by macrophages had been reported to increase the immunogenicity of tumor cells undergoing apoptosis. However, far less is known about its multiple properties, especially in cancer therapies. Here we found that Annexin V had a good anti-tumor activity in murine melanomaxenograft model. Treatment with Annexin V showed significant reduction in tumor size and remarkable tumor necrosis areas...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28401586/phospholipidomic-studies-in-human-cornea-from-climatic-droplet-keratopathy
#12
M Fernanda Suarez, M Carmen Piqueras, Leandro Correa, Evangelina Esposito, M Fernanda Barros, Sanjoy K Bhattacharya, Julio A Urrets-Zavalia, Horacio M Serra
Climatic droplet keratopathy (CDK) is an acquired degenerative disease predominantly affecting males over 40 years old. It results in progressive corneal opacities usually affecting both eyes. CDK is multifactorial and its etiology remains unknown. Our recent findings are consistent with CDK pathology being driven by environmental factors with oxidative stress playing an important role (for example, contributing to lipid peroxidation) rather than climate factors. The changes in corneal lipid composition affected by environmental factors remain understudied...
April 12, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28400736/nicotine-effects-and-receptor-expression-on-human-spermatozoa-possible-neuroendocrine-mechanism
#13
Rosita A Condorelli, Sandro La Vignera, Filippo Giacone, Linda Iacoviello, Laura M Mongioì, Giovanni Li Volti, Ignazio Barbagallo, Roberto Avola, Aldo E Calogero
The aim of this experimental study was to investigate the mechanism by which nicotine (NIC) alters spermatozoa and to evaluate the expression of nicotinic receptors (nAChR) subunits in human spermatozoa. We analyzed 30 healthy normozoospermic men. Spermatozoa were incubated with NIC 100 ng/ml and the nAChR antagonist, hexamethonium (HEX) (0, 100, 1,000, 10,000 ng/ml) for 3 and 24 h. The following sperm parameters evaluated: (a) progressive motility; (b) mitochondrial membrane potential (MMP); (c) chromatin compactness; (d) externalization of phosphatidylserine (PS); (e) late apoptosis; (f) viability; (g) DNA fragmentation; (h) degree of lipid peroxidation (LP) by flow cytometry; (i) nAChR subunits expression by quantitative Real Time PCR and (j) protein expression evaluation by Western blot analysis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28399627/relative-quantification-of-phospholipids-based-on-isotope-labeled-methylation-by-nanoflow-ultrahigh-performance-liquid-chromatography-tandem-mass-spectrometry-enhancement-in-cardiolipin-profiling
#14
Jong Cheol Lee, Seul Kee Byeon, Myeong Hee Moon
In this study, lipid analysis based on isotope-labeled methlylation (ILM) was performed by nanoflow liquid chromatog-raphy-eletrospray ionization-tandem mass spectrometry (nLC-ESI-MS/MS) for enhanced detection and quantification of targeted phospholipids. ILM depends on methylation of phosphate groups by (trimethylsilyl)diazomethane and the ILM based quantitation with reversed phase nLC-ESI-MS/MS provides advantages in PL profiling such as enhanced detectabil-ity of methylated PLs owing to increased hydrophobicity and substantial increase in resolution due to the increase of reten-tion...
April 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28398652/brucella-abortus-activated-microglia-induce-neuronal-death-through-primary-phagocytosis
#15
Ana M Rodríguez, M Victoria Delpino, M Cruz Miraglia, Miriam M Costa Franco, Paula Barrionuevo, Vida A Dennis, Sergio C Oliveira, Guillermo H Giambartolomei
Inflammation has long been implicated as a contributor to pathogenesis in neurobrucellosis. Many of the associated neurocognitive symptoms of neurobrucellosis may be the result of neuronal dysfunction resulting from the inflammatory response induced by Brucella abortus infection in the central nervous system. In this manuscript, we describe an immune mechanism for inflammatory activation of microglia that leads to neuronal death upon B. abortus infection. B. abortus was unable to infect or harm primary cultures of mouse neurons...
April 11, 2017: Glia
https://www.readbyqxmd.com/read/28397464/effects-of-ulinastatin-on-in-vitro-storage-lesions-of-human-red-blood-cells
#16
Ding-Hua Liu, Yun-Tai Yao, Li-Huan Li, Chun-Mei Huang
BACKGROUND: The study aimed to investigate the influence of in vitro storage on erythrocyte complement receptor one (E-CR1), cell shrinkage and eryptosis of human red blood cells (RBCs), and to assess the possible effects of ulinastatin (UTI) on them. METHODS: After collection, RBCs were treated with saline (control group) and different concentrations of UTI (5,000 U/mL, 10,000 U/mL, and 50,000 U/mL in Group C1, Group C2, and Group C3, respectively). E-CR1, cell size, and phosphatidylserine (PS) exposure and intracellular Ca2+ concentration were analyzed by flow cytometer every 7 days up to Day 35...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28388412/escrt-iii-acts-downstream-of-mlkl-to-regulate-necroptotic-cell-death-and-its-consequences
#17
Yi-Nan Gong, Cliff Guy, Hannes Olauson, Jan Ulrich Becker, Mao Yang, Patrick Fitzgerald, Andreas Linkermann, Douglas R Green
The activation of mixed lineage kinase-like (MLKL) by receptor-interacting protein kinase-3 (RIPK3) results in plasma membrane (PM) disruption and a form of regulated necrosis, called necroptosis. Here, we show that, during necroptosis, MLKL-dependent calcium (Ca(2+)) influx and phosphatidylserine (PS) exposure on the outer leaflet of the plasma membrane preceded loss of PM integrity. Activation of MLKL results in the generation of broken, PM "bubbles" with exposed PS that are released from the surface of the otherwise intact cell...
April 6, 2017: Cell
https://www.readbyqxmd.com/read/28387637/independent-validation-of-the-adjusted-gapss-role-of-thrombotic-risk-assessment-in-the-real-life-setting
#18
N Fernandez Mosteirin, L Saez Comet, C Salvador Osuna, J M Calvo Villas, J Velilla Marco
Objective The objective of this report is to independently validate the adjusted Global Antiphospholipid Syndrome Score (aGAPSS) to predict thrombosis in a cohort of patients with APS and/or autoimmune disease. Methods This retrospective cohort study included 319 consecutive patients with APS and/or autoimmune disease. Data on clinical manifestations, conventional cardiovascular risk factors and aPL profile were collected. The aGAPSS was calculated for each patient by adding together the points corresponding to the risk factors...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28379343/jnk-and-p38-mapk-pathways-link-capacitation-with-apoptosis-and-seminal-plasma-proteins-protect-sperm-by-interfering-with-both-routes
#19
Carolina Luna, Noelia Mendoza, Adriana Casao, Rosaura Pérez-Pé, José A Cebrián-Pérez, Teresa Muiño-Blanco
The Mitogen-activated protein kinase (MAPK) JNK and p38 signaling cascades are involved in triggering apoptosis in somatic cells. Given that spermatozoa are able to undergo apoptosis, we tested the hypothesis that these pathways might be functional in ram spermatozoa as two signal transduction mechanisms that contribute to the modulation of capacitation and apoptosis. Indirect immunofluorescence and western-blot analysis evidenced the presence of JNK and p38 in ram spermatozoa. To verify the involvement of these enzymes in sperm physiology, we determined the effect of specific inhibitors of JNK or p38 on in vitro capacitation induced with either cAMP-elevating agents or Epidermal Growth Factor (EGF)...
March 31, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28378415/early-%C3%AE-irradiation-and-subsequent-storage-of-red-cells-in-sag-m-additive-solution-potentiate-energy-imbalance-microvesiculation-and-susceptibility-to-stress-induced-apoptotic-cell-death
#20
S M Qadri, D Chen, P Schubert, D V Devine, W P Sheffield
γ-Irradiation of red blood cell (RBC) concentrates prevents transfusion-associated graft-versus-host disease but may diminish RBC quality. Herein, we show that early γ-irradiation (25 Gy) of RBC units and their subsequent storage in SAG-M additive solution altered membrane microvesiculation, supernatant haemoglobin and cytosolic ATP. γ-Irradiation did not influence phosphatidylserine externalization, a marker of erythrocyte apoptotic cell death (eryptosis), in RBC stored for 42 days. However, shorter periods (4-21 days) of storage accentuated eryptosis in γ-irradiated RBC versus untreated RBCs following energy depletion, suggesting that γ-irradiated RBC is primed for stress-induced eryptosis during storage...
April 5, 2017: Vox Sanguinis
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