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Platelets calcium

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https://www.readbyqxmd.com/read/27919911/in-vitro-activation-of-coagulation-by-human-neutrophil-dna-and-histone-proteins-but-not-neutrophil-extracellular-traps
#1
Denis F Noubouossie, Matthew F Whelihan, Yuan-Bin Yu, Erica Sparkenbaugh, Rafal Pawlinski, Dougald M Monroe, Nigel S Key
NETosis is a physiological process in which neutrophils release their nuclear material in the form of neutrophil extracellular traps (NETs). NETs have been reported to directly promote thrombosis in animal models. Although the effects of purified NET components including DNA, histone proteins and neutrophil enzymes on coagulation have been characterized, the mechanism by which intact NETs promote thrombosis is largely unknown. In this study, human neutrophils were stimulated to produce NETs in platelet-free plasma (PFP) or in buffer using PMA or calcium ionophore...
December 5, 2016: Blood
https://www.readbyqxmd.com/read/27911324/proteomics-analysis-of-blood-serums-from-alzheimer-s-disease-patients-using-itraq-labeling-technology
#2
Liming Shen, Liping Liao, Cheng Chen, Yi Guo, Dalin Song, Yong Wang, Youjiao Chen, Kaoyuan Zhang, Ming Ying, Shuiming Li, Qiong Liu, Jiazuan Ni
Alzheimer' disease (AD) is the most common form of dementia affecting up to 6% of the population over the age of 65. In order to discover differentially expressed proteins that might serve as potential biomarkers, the serums from AD patients and healthy controls were compared and analyzed using the proteomics approach of isobaric tagging for relative and absolute quantitation (iTRAQ). For the first time, AD biomarkers in serums are investigated in the Han Chinese population using iTRAQ labeled proteomics strategy...
December 1, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27910838/hydrogen-substituted-%C3%AE-tricalcium-phosphate-synthesized-in-organic-media
#3
Christoph Stähli, Jürg Thüring, Laëtitia Galea, Solène Tadier, Marc Bohner, Nicola Döbelin
β-Tricalcium phosphate (β-TCP) platelets synthesized in ethylene glycol offer interesting geometries for nano-structured composite bone substitutes but were never crystallographically analyzed. In this study, powder X-ray diffraction and Rietveld refinement revealed a discrepancy between the platelet structure and the known β-TCP crystal model. In contrast, a model featuring partial H for Ca substitution and the inversion of P1O4 tetrahedra, adopted from the whitlockite structure, allowed for a refinement with minimal misfits and was corroborated by HPO4(2-) absorptions in Fourier-transform IR spectra...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27903373/-therapeutic-effect-of-severe-thrombocytopenia-in-patients-underwent-transcatheter-patent-ductus-arteriosus-occlusion
#4
P Zhang, X Y Zhu, D Z Zhang, Q G Wang, X M Han, X T Sheng, C S Cui
Objective: To investigate the therapeutic effect of severe thrombocytopenia in patients underwent transcatheter patent ductus arteriosus occlusion. Methods: Clinical data of 80 pure patent ductus arteriosus patients who underwent interventional occlusion between February 2011 and November 2014 in General Hospital of Shenyang Military Region were retrospective analyzed.A bolus of heparin calcium (80 U/kg) was administered by intravenous injection during the procedure.Blood test was conducted in all patients before and after the procedure...
October 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/27879288/multi-omics-analysis-of-serum-samples-demonstrates-reprogramming-of-organ-functions-via-systemic-calcium-mobilization-and-platelet-activation-in-metastatic-melanoma
#5
Besnik Muqaku, Martin Eisninger, Samuel M Meier, Ammar Tahir, Tobias Prokop, Sebastian Haferkamp, Astrid Slany, Albrecht Reichle, Christopher Gerner
Pathophysiologies of cancer-associated syndroms such as cachexia are poorly understood and no routine biomarkers have been established, yet. Using shotgun proteomics, known marker molecules including PMEL, CRP, SAA and CSPG4 were found deregulated in patients with metastatic melanoma. Targeted analysis of 58 selected proteins with multiple reaction monitoring was applied for independent data verification. In three patients, two of which suffered from cachexia, a tissue damage signature was determined, consisting of nine proteins, PLTP, CD14, TIMP1, S10A8, S10A9, GP1BA, PTPRJ, CD44 and C4A, as well as increased levels of glycine and asparagine, and decreased levels of polyunsaturated phosphatidylcholine concentrations, as determined by targeted metabolomics...
November 22, 2016: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/27865927/structural-perturbations-induced-by-asn131-and-asn171-glycosylation-converge-within-the-efsam-core-and-enhance-stromal-interaction-molecule-1-mediated-store-operated-calcium-entry
#6
Yoo Jung Choi, Yue Zhao, Moshmi Bhattacharya, Peter B Stathopulos
A major intracellular calcium (Ca(2+)) uptake pathway in both excitable and non-excitable eukaryotic cells is store-operated Ca(2+) entry (SOCE). SOCE is the process by which endoplasmic reticulum (ER)-stored Ca(2+) depletion leads to activation of plasma membrane Ca(2+) channels to provide a sustained increase in cytosolic Ca(2+) levels that mediate a plethora of physiological processes ranging from the immune response to platelet aggregation. Stromal interaction molecule-1 (STIM1) is the principal regulator of SOCE and responds to changes in ER stored Ca(2+) through luminal sensing machinery composed of EF-hand and SAM domains (EFSAM)...
November 17, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27859382/value-of-calcium-and-phosphate-in-a-bicarbonate-containing-platelet-additive-solution-with-low-plasma-levels-in-maintaining-key-in-vitro-platelet-storage-parameters
#7
Andrey Skripchenko, Annette Turgeon, Dedeene Thompson-Montgomery, Helen Awatefe, Stephen J Wagner
BACKGROUND: Use of recently developed platelet (PLT) additive solutions (PAS) with 5% plasma levels may reduce the frequency and/or severity of transfusion reactions attributed to plasma. PLTs suspended in bicarbonate-containing PAS-5 with 5% plasma levels can maintain key PLT parameters during 7-day storage. This study evaluates the role of calcium and phosphate, as constituents of PAS-5, in maintaining PLT parameters. STUDY DESIGN AND METHODS: An Amicus apheresis PLT unit (n = 13) was equally divided into four 60-mL aliquots in CF-250 polyolefin bags...
November 17, 2016: Transfusion
https://www.readbyqxmd.com/read/27849108/influence-of-calcium-salts-and-bovine-thrombin-on-growth-factor-release-from-equine-platelet-rich-gel-supernatants
#8
Carlos E Giraldo, María E Álvarez, Jorge U Carmona
OBJECTIVE: To compare five activation methods in equine platelet-rich plasma (PRP) by determination of platelet-derived growth factor BB (PDGF-BB) and transforming growth factor beta 1 (TGF-β1) concentrations in platelet-rich gel (PRG) supernatants. METHODS: Platelet-rich plasma from 20 horses was activated by calcium chloride (CC), calcium gluconate (CG), bovine thrombin (BT), and their combinations, BTCC and BTCG. Both growth factor concentrations in PRG supernatants were measured by ELISA and compared with plasma and platelet lysates (PL) over time...
November 16, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27848265/the-nuts-and-bolts-of-the-platelet-release-reaction
#9
Smita Joshi, Sidney W Whiteheart
Secretion is essential to many of the roles that platelets play in the vasculature, e.g., thrombosis, angiogenesis, and inflammation, enabling platelets to modulate the microenvironment at sites of vascular lesions with a myriad of bioactive molecules stored in their granules. Past studies demonstrate that granule cargo release is mediated by Soluble NSF Attachment Protein Receptor (SNARE) proteins, which are required for granule-plasma membrane fusion. Several SNARE regulators, which control when, where, and how the SNAREs interact, have been identified in platelets...
November 16, 2016: Platelets
https://www.readbyqxmd.com/read/27830834/suilysin-induced-platelet-neutrophil-complexes-formation-is-triggered-by-pore-formation-dependent-calcium-influx
#10
Shengwei Zhang, Yuling Zheng, Shaolong Chen, Shujing Huang, Keke Liu, Qingyu Lv, Yongqiang Jiang, Yuan Yuan
Platelet activation and platelet-neutrophil interactions have been found to be involved in inflammation, organ failure and soft-tissue necrosis in bacterial infections. Streptococcus suis, an emerging human pathogen, can cause streptococcal toxic-shock syndrome (STSS) similarly to Streptococcus pyogenes. Currently, S. suis-platelet interactions are poorly understood. Here, we found that suilysin (SLY), the S. suis cholesterol-dependent cytolysin (CDC), was the sole stimulus of S. suis that induced platelet-neutrophil complexes (PNC) formation...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27821623/optimization-of-a-luminescence-based-high-throughput-screening-assay-for-detecting-apyrase-activity
#11
John R Veloria, Ashwini K Devkota, Eun Jeong Cho, Kevin N Dalby
Apyrase is a calcium-activated enzyme that catalyzes the conversion of adenosine triphosphate (ATP) to adenosine diphosphate (ADP), adenosine monophosphate (AMP), and Pi It is currently used in studies involving cancer and platelet aggregation in humans, as well as herbicide resistance in plants. Inhibitors of apyrase are being investigated for their use to suppress tumors and combat herbicide resistance. Only a few inhibitors of apyrase have been reported, many of which were identified through automated screening using a 96-well plate format and colorimetric phosphate detection...
November 7, 2016: Journal of Biomolecular Screening
https://www.readbyqxmd.com/read/27815469/effect-of-bmp2-platelet-rich-plasma-biphasic-calcium-phosphate-scaffold-on-accelerated-osteogenesis-in-mastoid-obliteration
#12
Chul Ho Jang, Cheol Hee Choi, Yong Beom Cho
The aim of this study was to evaluate the synergistic effect of platelet-rich plasma (PRP) and recombinant human bone morphogenic protein (BMP)-2 on accelerated osteogenesis of hydroxyapatite/β-tricalcium phosphate mixture and biphasic calcium phosphate (BCP) in mastoid obliteration. To the best of our knowledge, there have been no studies reporting the enhancing effects of BCP, combined with BMP2 and PRP, on osteogenesis in mastoid obliteration. Mastoid obliteration was performed in a control group (BCP only, n=7), a group treated with BMP2 and BCP (experimental group I, n=7), and a group treated with BMP2, PRP and BCP (experimental group II, n=7)...
November 2016: In Vivo
https://www.readbyqxmd.com/read/27812172/adult-hematology-and-clinical-chemistry-laboratory-reference-ranges-in-a-zimbabwean-population
#13
Wadzanai P Samaneka, Gibson Mandozana, Willard Tinago, Nehemiah Nhando, Nyaradzo M Mgodi, Mutsawashe F Bwakura-Dangarembizi, Marshall W Munjoma, Zvenyika A R Gomo, Zvavahera M Chirenje, James G Hakim
BACKGROUND: Laboratory reference ranges used for clinical care and clinical trials in various laboratories in Zimbabwe were derived from textbooks and research studies conducted more than ten years ago. Periodic verification of these ranges is essential to track changes over time. The purpose of this study was to establish hematology and chemistry laboratory reference ranges using more rigorous methods. METHODS: A community-based cross-sectional study was carried out in Harare, Chitungwiza, and Mutoko...
2016: PloS One
https://www.readbyqxmd.com/read/27811985/elevated-homocysteine-levels-in-type-2-diabetes-induce-constitutive-neutrophil-extracellular-traps
#14
Manjunath B Joshi, Guruprasad Baipadithaya, Aswath Balakrishnan, Mangala Hegde, Manik Vohra, Rayees Ahamed, Shivashankara K Nagri, Lingadakai Ramachandra, Kapaettu Satyamoorthy
Constitutively active neutrophil extracellular traps (NETs) and elevated plasma homocysteine are independent risk factors for Type 2 Diabetes (T2D) associated vascular diseases. Here, we show robust NETosis due to elevated plasma homocysteine levels in T2D subjects and increased components of NETs such as neutrophil elastase and cell free DNA. Cooperative NETs formation was observed in neutrophils exposed to homocysteine, IL-6 and high glucose suggesting acute temporal changes tightly regulate constitutive NETosis...
November 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27804000/novel-sila-amide-derivatives-of-n-acetylcysteine-protects-platelets-from-oxidative-stress-induced-apoptosis
#15
Manoj Paul, Ram M Thushara, Swamy Jagadish, Uzma I Zakai, Robert West, Kempaiah Kemparaju, Kesturu S Girish
Oxidative stress-induced platelet apoptosis is one among the many causes for the development and progression of many disorders like cardiovascular diseases, arthritis, Alzheimer's disease and many chronic inflammatory responses. Many studies have demonstrated the less optimal effect of N-acetyl cysteine (NAC) in oxidative stress-induced cellular damage. This could be due to its less lipophilicity which makes it difficult to enter the cellular membrane. Therefore in the present study, lipophilic sila-amide derivatives (6a and 6b) synthesized through the reaction of NAC with 3-Aminopropyltrimethylsilane and aminomethyltrimethylsilane were used to determine their protective property against oxidative stress-induced platelet apoptosis...
November 1, 2016: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/27782270/enhanced-bone-morphogenic-property-of-parylene-c
#16
Ya-Ting Tsai, Chao-Wei Huang, Hui-Yu Liu, Mei-Ching Huang, Ting-Pi Sun, Wen-Chien Chen, Chih-Yu Wu, Shih-Torng Ding, Hsien-Yeh Chen
The ability to induce osteointegration was introduced to a parylene-C surface via the simple and intuitive process of protein adsorption mediated by hydrophobic interactions. In this way, bone morphogenetic protein (BMP)-2, fibronectin, and platelet-rich plasma (PRP) could be immobilized on parylene-C surfaces. This approach alleviates concerns related to the use of potentially harmful substances in parylene-C modification processes. The adsorbed protein molecules were quantitatively characterized with respect to adsorption efficacy and binding affinity, and the important biological activities of the proteins were also examined using both early and late markers of osteogenetic activity, including alkaline phosphatase expression, calcium mineralization and marker gene expression...
October 26, 2016: Biomaterials Science
https://www.readbyqxmd.com/read/27778530/gpvi-modulation-during-platelet-activation-and-storage-its-expression-levels-and-ectodomain-shedding-compared-to-markers-of-platelet-storage-lesion
#17
Ehteramolsadat Hosseini, Mehran Ghasemzadeh, Fatemeh Nassaji, Zeynab Pirmohammad Jamaat
Platelet storage is associated with deleterious changes leading to the loss of platelet reactivity and response. During storage, platelets experience increased expression and shedding of P-selectin and CD40L as specific markers of platelet activation, whereas GPIbα decreases due to ectodomain shedding. As an important adhesive receptor, GPVI contributes significantly to thrombus formation while its expression and shedding levels during storage of platelet products have not been well characterized yet. This study investigated the modulation of GPVI during platelet storage...
October 25, 2016: Platelets
https://www.readbyqxmd.com/read/27773843/using-tiletamine-zolazepam-xylazine-anesthesia-compared-to-co2-inhalation-for-terminal-clinical-chemistry-hematology-and-coagulation-analysis-in-mice
#18
Oksana N Khokhlova, Elena A Tukhovskaya, Irina N Kravchenko, Elena S Sadovnikova, Irina A Pakhomova, Elena A Kalabina, Alexander V Lobanov, Elvira R Shaykhutdinova, Alina M Ismailova, Arkady N Murashev
INTRODUCTION: It is important that the method of anesthesia of mice does not considerably alter the animal's physiological and metabolic status before terminal blood sampling taken in order to analyze clinical pathology parameters. METHODS: Hematology, hemostasis, and clinical chemistry parameters were compared in male and female BALB/c mice exposed to either tiletamine-zolazepam-xylazine (TZX) anesthesia or euthanasia in carbon dioxide (CO2) chamber to reveal an alternative method of anesthesia vs...
October 20, 2016: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/27758768/farnesoid-x-receptor-and-its-ligands-inhibit-the-function-of-platelets
#19
Leonardo A Moraes, Amanda J Unsworth, Sakthivel Vaiyapuri, Marfoua S Ali, Parvathy Sasikumar, Tanya Sage, Gagan D Flora, Alex P Bye, Neline Kriek, Emilie Dorchies, Olivier Molendi-Coste, David Dombrowicz, Bart Staels, David Bishop-Bailey, Jonathan M Gibbins
OBJECTIVE: Although initially seemingly paradoxical because of the lack of nucleus, platelets possess many transcription factors that regulate their function through DNA-independent mechanisms. These include the farnesoid X receptor (FXR), a member of the superfamily of ligand-activated transcription factors, that has been identified as a bile acid receptor. In this study, we show that FXR is present in human platelets and FXR ligands, GW4064 and 6α-ethyl-chenodeoxycholic acid, modulate platelet activation nongenomically...
October 6, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27729283/locally-and-traditionally-used-ligusticum-species-a-review-of-their-phytochemistry-pharmacology-and-pharmacokinetics
#20
Paul Owusu Donkor, Ying Chen, Liqin Ding, Feng Qiu
ETHNOPHARMACOLOGICAL RELEVANCE: Ligusticum species (Umbelliferae) have been widely used in traditional Chinese medicine, Korean folk medicine and Native American medicine for their medicinal and nutritional value. Decoctions of the rhizomes are used in treatment and prophylaxis of migraine, anaemia and cardiovascular conditions including stroke. AIM OF STUDY: This review is intended to fully compile the constituents of locally and traditionally used Ligusticum species, present their bioactivities and highlight potential leads for future drug design, and thus, provide a reference for further research and application of these species...
October 8, 2016: Journal of Ethnopharmacology
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