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https://www.readbyqxmd.com/read/28718063/new-insights-on-platelets-and-platelet-derived-microparticles-in-systemic-lupus-erythematosus
#1
REVIEW
Marc Scherlinger, Vanja Sisirak, Christophe Richez, Estibaliz Lazaro, Pierre Duffau, Patrick Blanco
PURPOSE OF REVIEW: Current knowledge on the role of platelets and platelet-derived microparticles (PMPs) on the immune system has been fast-growing. Systemic lupus erythematosus (SLE) is a systemic auto-immune disorder characterized by a loss of tolerance toward nuclear auto-antigens. Although recent studies allowed a better understanding of SLE pathogenesis, there is an urgent need for the development of new treatments and the identification of new biomarkers to assess the disease activity...
August 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28717419/platelet-extracellular-vesicles-induce-a-pro-inflammatory-smooth-muscle-cell-phenotype
#2
Tanja Vajen, Birke J Benedikter, Alexandra C A Heinzmann, Elena M Vasina, Yvonne Henskens, Martin Parsons, Patricia B Maguire, Frank R Stassen, Johan W M Heemskerk, Leon J Schurgers, Rory R Koenen
Extracellular vesicles (EVs) are mediators of cell communication during health and disease, and abundantly released by platelets upon activation or during ageing. Platelet EVs exert modulatory effects on immune and vascular cells. Platelet EVs may modulate the function of vascular smooth muscle cells (SMC). Platelet EVs were isolated from platelet-rich plasma and incubated with SMC in order to assess binding, proliferation, migration and pro-inflammatory phenotype of the cells. Platelet EVs firmly bound to resting SMC through the platelet integrin αIIbβ3, while binding also occurred in a CX3CL1-CX3CR1-dependent manner after cytokine stimulation...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/28715576/association-of-ozone-exposure-with-cardiorespiratory-pathophysiologic-mechanisms-in-healthy-adults
#3
Drew B Day, Jianbang Xiang, Jinhan Mo, Feng Li, Mingkei Chung, Jicheng Gong, Charles J Weschler, Pamela A Ohman-Strickland, Jan Sundell, Wenguo Weng, Yinping Zhang, Junfeng Jim Zhang
Importance: Exposure to ozone has been associated with cardiovascular mortality, but the underlying biological mechanisms are not yet understood. Objective: To examine the association between ozone exposure and cardiopulmonary pathophysiologic mechanisms. Design, Setting, and Participants: A longitudinal study involving 89 healthy adult participants living on a work campus in Changsha City, China, was conducted from December 1, 2014, to January 31, 2015...
July 17, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28710615/aldosterone-antagonist-therapy-and-its-relationship-with-inflammation-fibrosis-thrombosis-mineral-bone-disorder-and-cardiovascular-complications-in-peritoneal-dialysis-pd-patients
#4
Rafał Donderski, Paweł Stróżecki, Beata Sulikowska, Magdalena Grajewska, Ilona Miśkowiec, Anna Stefańska, Joanna Siódmiak, Grażyna Odrowąż-Sypniewska, Jacek Manitius
BACKGROUND: High aldosterone level may contribute to pathogenesis of hypertension, vessels damage and cardiovascular system deterioration in chronic kidney disease patients. Besides its classical action via mineralocorticoid receptor, aldosterone is also involved in cell growth, inflammation, oxidative stress, endothelial dysfunction and exerts fibroproliferative effects. The aim of the study was to assess whether aldosterone antagonist treatment may influence serum level of inflammatory, fibrosis, thrombosis and mineral-bone metabolism markers in peritoneal dialysis (PD) patients and blood pressure, aortic stiffness, echocardiographic indices after 12 months of treatment...
July 14, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28707058/is-there-any-relationship-between-adipocytokines-and-angiogenesis-factors-to-address-endothelial-dysfunction-and-platelet-aggregation-in-untreated-patients-with-preeclampsia
#5
Zeynep B Güngör, Hakan Ekmekçi, Abdullah Tüten, Sait Toprak, Gülsel Ayaz, Oktay Çalışkan, Hüseyin Sönmez, Rıza Madazlı, Orkide Donma, Mine Kucur, Turgut Ulutin, Özlem Balcı Ekmekçi
PURPOSE: Preeclampsia is a multisystem disorder and its etiology remains still unclear. Recent hypotheses rely on imbalance between angiogenic and antiangiogenic factors and disruption of endothelial function of spiral arteries. In addition; increased VTE (venous thromboembolism) risk is still unclear in preeclampsia. Our aim was to investigate the relationship between endothelial dysfunction, adipocytokines, platelet function, and vasculogenesis in preeclampsia. METHODS: Plasma angiogenic (PlGF, VEGF), antiangiogenic factors (sflt-1, endoglin) with adipocytokines (leptin, adiponectin, ghrelin), endothelial dysfunction markers (vWF, NO), and platelet function markers (ADP and collagen induced platelet aggregation, P-selectin) were examined in 30 early-onset, 22 late-onset preeclampsia, and 27 healthy pregnants...
July 13, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28705855/soluble-p-selectin-is-the-smoke-not-the-fire
#6
Peter L Gross
No abstract text is available yet for this article.
July 13, 2017: Blood
https://www.readbyqxmd.com/read/28704925/licochalcone-a-prevents-platelet-activation-and-thrombus-formation-through-the-inhibition-of-plc%C3%AE-2-pkc-akt-and-mapk-pathways
#7
Li-Ming Lien, Kuan-Hung Lin, Li-Ting Huang, Mei-Fang Tseng, Hou-Chang Chiu, Ray-Jade Chen, Wan-Jung Lu
Platelet activation is involved in cardiovascular diseases, such as atherosclerosis and ischemic stroke. Licochalcone A (LA), an active ingredient of licorice, exhibits multiple biological activities such as anti-oxidation and anti-inflammation. However, its role in platelet activation remains unclear. Therefore, the study investigated the antiplatelet mechanism of LA. Our data revealed that LA (2-10 μM) concentration dependently inhibited platelet aggregation induced by collagen, but not thrombin and U46619...
July 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28699088/sepsis-prediction-in-critically-ill-patients-by-platelet-activation-markers-on-icu-admission-a-prospective-pilot-study
#8
Nathalie Layios, Céline Delierneux, Alexandre Hego, Justine Huart, Christian Gosset, Christelle Lecut, Nathalie Maes, Pierre Geurts, Arnaud Joly, Patrizio Lancellotti, Adelin Albert, Pierre Damas, André Gothot, Cécile Oury
BACKGROUND: Platelets have been involved in both immune surveillance and host defense against severe infection. To date, whether platelet phenotype or other hemostasis components could be associated with predisposition to sepsis in critical illness remains unknown. The aim of this work was to identify platelet markers that could predict sepsis occurrence in critically ill injured patients. METHODS: This single-center, prospective, observational, 7-month study was based on a cohort of 99 non-infected adult patients admitted to ICUs for elective cardiac surgery, trauma, acute brain injury, and post-operative prolonged ventilation and followed up during ICU stay...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28698503/cd15s-cd62e-interaction-mediates-the-adhesion-of-non-small-cell-lung-cancer-cells-on-brain-endothelial-cells-implications-for-cerebral-metastasis
#9
Samah A Jassam, Zaynah Maherally, James R Smith, Keyoumars Ashkan, Federico Roncaroli, Helen L Fillmore, Geoffrey J Pilkington
Expression of the cell adhesion molecule (CAM), Sialyl Lewis X (CD15s) correlates with cancer metastasis, while expression of E-selectin (CD62E) is stimulated by TNF-α. CD15s/CD62E interaction plays a key role in the homing process of circulating leukocytes. We investigated the heterophilic interaction of CD15s and CD62E in brain metastasis-related cancer cell adhesion. CD15s and CD62E were characterised in human brain endothelium (hCMEC/D3), primary non-small cell lung cancer (NSCLC) (COR-L105 and A549) and metastatic NSCLC (SEBTA-001 and NCI-H1299) using immunocytochemistry, Western blotting, flow cytometry and immunohistochemistry in human brain tissue sections...
July 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28698333/research-protocol-for-platelets-in-out-of-hospital-cardiac-arrest-an-observational-case-controlled-feasibility-study-to-assess-coagulation-and-platelet-function-abnormalities-with-rotem-following-out-of-hospital-cardiac-arrest-pohcar
#10
Agnieszka Skorko, Matthew Thomas, Andrew Mumford, Thomas Johnson, Elinor Griffiths, Rosemary Greenwood, Jonathan Benger
INTRODUCTION: Out-of-hospital cardiac arrest (OHCA) has an annual incidence of approximately 60 000 in the UK. Less than 10% of those who receive resuscitation survive to hospital discharge. For OHCA of a presumed cardiac cause, the optimal antiplatelet therapy is currently unknown. Previous studies indicate that a procoagulopathic state exists postcardiac arrest which may contribute to the formation of thrombi and contribute to poor outcomes. However, the administration of antiplatelet therapies needs to be balanced against the increased risk of bleeding that these individuals face...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28693848/does-penile-tourniquet-application-alter-bacterial-adhesion-to-rat-urethral-cells-an-in-vitro-study
#11
Ozlem Boybeyi-Turer, Birgul Kacmaz, Esra Arat, Pınar Atasoy, Ucler Kisa, Yasemin Dere Gunal, Mustafa Kemal Aslan, Tutku Soyer
PURPOSE: To investigate the effects of penile tourniquet (PT) application on bacterial adhesion to urothelium. METHODS: Fifty-six rats were allocated into control group (CG), sham group (SG), PT group (PTG). No intervention was applied in CG. A 5mm-length urethral repair was performed in SG and PTG. In PTG, a 10-min duration of PT was applied during the procedure and the tissue oxygenation monitor was used to adjust the same degree of ischemia in all subjects. Samples were examined for wound healing parameters and tissue levels of inflammatory markers, eNOS, e-selectin, and ICAM-1antibodies...
June 28, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28693022/temsirolimus-sensitive-stimulation-of-platelet-activity-apoptosis-and-aggregation-by-collagen-related-peptide
#12
Hang Cao, Rosi Bissinger, Anja T Umbach, Meinrad Gawaz, Florian Lang
BACKGROUND/AIMS: The mammalian target of rapamycin (mTOR) inhibitor temsirolimus stimulates apoptosis of tumor cells and is thus therapeutically used for the treatment of diverse malignancies. On the other hand, temsirolimus has been shown to protect against apoptosis of hippocampal neurons. Similar to nucleated cells, blood platelets may enter suicidal death characterized by cell shrinkage and cell membrane scrambling. Platelet apoptosis is frequently preceded by Ca2+ entry, degranulation, integrin activation and stimulation of caspases...
July 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28692478/diagnosis-of-vitality-in-skin-wounds-in-the-ligature-marks-resulting-from-suicide-hanging
#13
Isabel Legaz Pérez, Maria Falcón, M Gimenez, F Martínez Diaz, M D Pérez-Cárceles, E Osuna, D Nuno-Vieira, A Luna
Ascertaining the vital origin of skin wounds is one of the most challenging problems in forensic pathology. The forensic literature describes biomarkers and methods for differentiating vital and postmortem wounds, although no clear conclusions have been reached. The aim of this study was to characterize human vital wounds by analyzing the concentrations of metallic ions and the expression of P-selectin and cathepsin D in skin wounds in the ligature marks in a cohort of suicidal hangings for which vitality was previously demonstrated...
July 7, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/28688660/impact-of-tranexamic-acid-on-coagulation-and-inflammation-in-murine-models-of-traumatic-brain-injury-and-hemorrhage
#14
Ryan M Boudreau, Mark Johnson, Rosalie Veile, Lou Ann Friend, Holly Goetzman, Timothy A Pritts, Charles C Caldwell, Amy T Makley, Michael D Goodman
BACKGROUND: Posttraumatic coagulopathy and inflammation can exacerbate secondary cerebral damage after traumatic brain injury (TBI). Tranexamic acid (TXA) has been shown clinically to reduce mortality in hemorrhaging and head-injured trauma patients and has the potential to mitigate secondary brain injury with its reported antifibrinolytic and antiinflammatory properties. We hypothesized that TXA would improve posttraumatic coagulation and inflammation in a murine model of TBI alone and in a combined injury model of TBI and hemorrhage (TBI/H)...
July 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28687005/p-but-not-e-or-l-selectin-mediated-rolling-adhesion-persistence-in-hemodynamic-flow-diverges-between-metastatic-and-leukocytic-cells
#15
Erin Elizabeth Edwards, Jaeho Oh, Ananyaveena Anilkumar, Katherine Gayle Birmingham, Susan Napier Thomas
The ability of leukocytic cells to engage selectins via rolling adhesion is critical to inflammation, but selectins are also implicated in mediating metastatic dissemination. Using a microfluidic- and flow-based cell adhesion chromatography experimental and analytical technique, we interrogated the cell-subtype differences in engagement and sustainment of rolling adhesion on P-, E-, and L-selectin-functionalized surfaces in physiological flow. Our results indicate that, particularly at low concentrations of P-selectin, metastatic but not leukocytic cells exhibit reduced rolling adhesion persistence, whereas both cell subtypes exhibited reduced persistence on L-selectin and high persistence on E-selectin, differences not revealed by flow cytometry analysis or reflected in the extent or velocity of rolling adhesion...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28686648/increased-levels-of-soluble-forms-of-e-selectin-and-icam-1-adhesion-molecules-during-human-leptospirosis
#16
Loic Raffray, Claude Giry, Yoga Thirapathi, Anne-Hélène Reboux, Marie-Christine Jaffar-Bandjee, Philippe Gasque
Leptospirosis is a multisystemic zoonotic disease with infiltration of visceral organs by Leptospira. The capacity of the vascular endothelium to grant immune cell recruitment and activation in target organs during the disease course remains poorly characterized. We ascertained the levels of expression of several soluble cell adhesion molecules (CAM) notably expressed by endothelial cells in human leptospirosis. We prospectively enrolled 20 hospitalized patients and compared them to 10 healthy controls. Disease severity was defined by one or more organ failures, or death...
2017: PloS One
https://www.readbyqxmd.com/read/28685720/effect-of-platelet-derived-p-selectin-on-neutrophil-recruitment-in-a-mouse-model-of-sepsis-induced-acute-kidney-injury
#17
Xiu-Hua Li, Yong-Bing Qian, Xiao-Xiao Meng, Rui-Lan Wang
BACKGROUND: Acute kidney injury (AKI) is a severe disease in critically ill patients. Neutrophil infiltration into kidney was associated with the development of AKI, and P-selectin may be involved in the process of neutrophil recruitment in kidney. This study aimed to explore the potential effect of platelet-derived P-selectin on neutrophil recruitment in a mouse model of sepsis-induced AKI. METHODS: A total of 30 C57BL/6 male mice were divided into five groups (n = 6 in each): sham group, sepsis group, anti-Ly6G group, anti-P-selectin group, and platelet depletion group...
July 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28680883/the-interaction-of-selectins-and-psgl-1-as-a-key-component-in-thrombus-formation-and-cancer-progression
#18
REVIEW
János Kappelmayer, Béla Nagy
Cellular interaction is inevitable in the pathomechanism of human disease. Formation of heterotypic cellular aggregates, between distinct cells of hematopoietic and nonhematopoietic origin, may be involved in events leading to inflammation and the complex process of cancer progression. Among adhesion receptors, the family of selectins with their ligands have been considered as one of the major contributors to cell-cell interactions. Consequently, the inhibition of the interplay between selectins and their ligands may have potential therapeutic benefits...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28673898/platelet-derived-factor-v-is-a-critical-mediator-of-arterial-thrombosis
#19
Meiping Ren, Rong Li, Ni Chen, Ningbo Pang, Yongjie Li, Xin Deng, Liqun Wang, Mao Luo, Yan Liu, Haiyan Hao, Yong Liu, Hongmin Sun, Jianbo Wu
BACKGROUND: Coagulation factor V (FV) plays a key role in hemostasis, is present in plasma and platelets, and has both pro- and anticoagulant properties; however, the contribution of platelet-derived FV to arterial thrombosis remains undetermined. METHODS AND RESULTS: Using transgenic mice with various levels of FV gene expression that was restricted to the plasma or platelets, the roles of platelet FV were evaluated in the regulation of arterial thrombosis and platelet activation...
July 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28673336/cerebrospinal-fluid-biomarkers-for-alzheimer-s-and-vascular-disease-vary-by-age-gender-and-apoe-genotype-in-cognitively-normal-adults
#20
Ge Li, Jane B Shofer, Eric C Petrie, Chang-En Yu, Charles W Wilkinson, Dianne P Figlewicz, Andrew Shutes-David, Jing Zhang, Thomas J Montine, Murray A Raskind, Joseph F Quinn, Douglas R Galasko, Elaine R Peskind
BACKGROUND: This study sought to evaluate gender and APOE genotype-related differences in the concentrations of cerebrospinal fluid (CSF) biomarkers for Alzheimer's disease (AD) and cerebrovascular injury across the life span of cognitively normal adults. METHODS: CSF amyloid beta1-42 (Aβ42), phospho-tau-181 (p-tau181), and total tau were measured in 331 participants who were between the ages of 21 and 100. CSF E-selectin and vascular cell adhesion protein 1 (VCAM1) were measured in 249 participants who were between the ages of 50 and 100...
July 3, 2017: Alzheimer's Research & Therapy
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