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Platelet integrin

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https://www.readbyqxmd.com/read/29034237/proteomics-of-eosinophil-activation
#1
REVIEW
Deane F Mosher, Emily M Wilkerson, Keren B Turton, Alexander S Hebert, Joshua J Coon
We recently identified and quantified >7,000 proteins in non-activated human peripheral blood eosinophils using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) and described phosphoproteomic changes that accompany acute activation of eosinophils by interleukin-5 (IL5) (1). These data comprise a treasure trove of information about eosinophils. We illustrate the power of label-free LC-MS/MS quantification by considering four examples: complexity of eosinophil STATs, contribution of immunoproteasome subunits to eosinophil proteasomes, complement of integrin subunits, and contribution of platelet proteins originating from platelet-eosinophil complexes to the overall proteome...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29032524/patterns-and-levels-of-platelet-glycosylation-in-patients-with-coronary-heart-disease-and-type-2-diabetes-mellitus
#2
Liping Li, Chenxue Qu, Xuelian Wu, Juhua Dai, Yao Lu, Yan Gong, Ran You, Yaqi Liu
Coronary heart disease (CHD) and diabetes mellitus (DM) have high reactivity of platelets and an increased risk of thrombosis. Platelet glycosylation is closely related to platelet function and survival. However, the alteration of platelet glycosylation in CHD and T2DM still remains unknown. Platelet samples were obtained from 55 healthy controls and 102 patients, including 33 CHD, 30 T2DM and 39 CHD complicated with T2DM (CHD + T2DM). Platelet glycosylation was detected using eight-lectin based assay by flow cytometry...
October 14, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29029772/inhibition-of-mammalian-target-of-rapamycin-signaling-with-rapamycin-prevents-trauma-induced-heterotopic-ossification
#3
Ammar T Qureshi, Devaveena Dey, Erin M Sanders, Jonathan G Seavey, Allison M Tomasino, Kaitlyn Moss, Benjamin Wheatley, David Cholok, Shawn Loder, John Li, Benjamin Levi, Thomas A Davis
A pressing clinical need exists for 63% to 65% of combat-wounded service members and 11% to 20% of civilians who develop heterotopic ossification (HO) after blast-related extremity injury and traumatic injuries, respectively. The mammalian target of rapamycin pathway is a central cellular sensor of injury. We evaluated the prophylactic effects of rapamycin, a selective inhibitor of mammalian target of rapamycin signaling, on HO formation in a rat model of blast-related, polytraumatic extremity injury. Rapamycin was administered intraperitoneally daily for 14 days at 0...
October 5, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29021578/strong-binding-of-platelet-integrin-%C3%AE-iib%C3%AE-3-to-fibrin-clots-potential-target-to-destabilize-thrombi
#4
Peter Höök, Rustem I Litvinov, Oleg V Kim, Shixin Xu, Zhiliang Xu, Joel S Bennett, Mark S Alber, John W Weisel
The formation of platelet thrombi is determined by the integrin αIIbβ3-mediated interactions of platelets with fibrinogen and fibrin. Blood clotting in vivo is catalyzed by thrombin, which simultaneously induces fibrinogen binding to αIIbβ3 and converts fibrinogen to fibrin. Thus, after a short time, thrombus formation is governed by αIIbβ3 binding to fibrin fibers. Surprisingly, there is little understanding of αIIbβ3 interaction with fibrin polymers. Here we used an optical trap-based system to measure the binding of single αIIbβ3 molecules to polymeric fibrin and compare it to αIIbβ3 binding to monomeric fibrin and fibrinogen...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29021221/cancer-associated-fibroblasts-promote-directional-cancer-cell-migration-by-aligning-fibronectin
#5
Begum Erdogan, Mingfang Ao, Lauren M White, Anna L Means, Bryson M Brewer, Lijie Yang, M Kay Washington, Chanjuan Shi, Omar E Franco, Alissa M Weaver, Simon W Hayward, Deyu Li, Donna J Webb
Cancer-associated fibroblasts (CAFs) are major components of the carcinoma microenvironment that promote tumor progression. However, the mechanisms by which CAFs regulate cancer cell migration are poorly understood. In this study, we show that fibronectin (Fn) assembled by CAFs mediates CAF-cancer cell association and directional migration. Compared with normal fibroblasts, CAFs produce an Fn-rich extracellular matrix with anisotropic fiber orientation, which guides the cancer cells to migrate directionally...
October 11, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29016749/differential-enos-signalling-by-platelet-subpopulations-regulates-adhesion-and-aggregation
#6
Aneta Radziwon-Balicka, Gabriela Lesyk, Valentina Back, Teresa Fong, Erica L Loredo-Calderon, Bin Dong, Haitham El-Sikhry, Ahmed A El-Sherbani, Ayman El-Kadi, Stephen Ogg, Arno Siraki, John M Seubert, Maria Jose Santos-Martinez, Marek W Radomski, Carlos A Velazquez-Martinez, Ian R Winship, Paul Jurasz
Aims: In addition to maintaining hemostasis, circulating blood platelets are the cellular culprits that form occlusive thrombi in arteries and veins. Compared to blood leukocytes, which exist as functionally distinct subtypes, platelets are considered to be relatively simple cell fragments that form vascular system plugs without a differentially regulated cellular response. Hence, investigation into platelet subpopulations with distinct functional roles in hemostasis/thrombosis has been limited...
September 4, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28961039/clathrin-mediated-integrin-%C3%AE-iib%C3%AE-3-trafficking-controls-platelet-spreading
#7
Wen Gao, Panlai Shi, Xue Chen, Lin Zhang, Junling Liu, Xuemei Fan, Xinping Luo
Dynamic endocytic and exocytic trafficking of integrins is an important mechanism for cell migration, invasion, and cytokinesis. Endocytosis of integrin can be classified as clathrin dependent and clathrin independent manners. And rapid delivery of endocytic integrins back to the plasma membrane is key intracellular signals and is indispensable for cell movement. Integrin αIIbβ3 plays a critical role in thrombosis and hemostasis. Although previous studies have demonstrated that internalization of fibrinogen-bound αIIbβ3 may regulate platelet activation, the roles of endocytic and exocytic trafficking of integrin αIIbβ3 in platelet activation are unclear...
September 29, 2017: Platelets
https://www.readbyqxmd.com/read/28956830/platelet-integrins-in-tumor-metastasis-do-they-represent-a-therapeutic-target
#8
REVIEW
Marion Lavergne, Emily Janus-Bell, Mathieu Schaff, Christian Gachet, Pierre H Mangin
Platelets are small anucleated cell fragments that ensure the arrest of bleeding after a vessel wall injury. They are also involved in non-hemostatic function such as development, immunity, inflammation, and in the hematogeneous phase of metastasis. While the role of platelets in tumor metastasis has been recognized for 60 years, the molecular mechanism underlying this process remains largely unclear. Platelets physically and functionally interact with various tumor cells through surface receptors including integrins...
September 28, 2017: Cancers
https://www.readbyqxmd.com/read/28954860/receptor-mediated-cell-mechanosensing
#9
Yunfeng Chen, Lining Ju, Muaz Rushdi, Chenghao Ge, Cheng Zhu
Mechanosensing describes the ability of a cell to sense mechanical cues of its micro-environment, including not only all components of force, stress and strain but also substrate rigidity, topology and adhesiveness. This ability is crucial for the cell to respond to the surrounding mechanical cues and adapt to the changing environment. Examples of responses and adaptation include (de)activation, proliferation/apoptosis, and (de)differentiation. Receptor-mediated cell mechanosensing is a multi-step process that is initiated by binding of cell surface receptors to their ligands on the extracellular matrix or the surface of adjacent cells...
September 27, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28954813/kindlin-supports-platelet-integrin-%C3%AE-iib%C3%AE-3-activation-by-interacting-with-paxillin
#10
Juan Gao, Ming Huang, Jingjing Lai, Kaijun Mao, Peisen Sun, Zhongyuan Cao, Youpei Hu, Yingying Zhang, Marie L Schulte, Chaozhi Jin, Jian Wang, Gilbert C White, Zhen Xu, Yan-Qing Ma
Kindlins play an important role in supporting integrin activation by cooperating with talin; however, the mechanistic details remain unclear. Here, we disclosed that kindlins directly interacted with paxillin and this interaction could support integrin αIIbβ3 activation. An exposed loop in the N-terminal F0 subdomain of kindlins was involved in mediating the interaction. Disruption of kindlin binding to paxillin by structure-based mutations significantly impaired the function of kindlins in supporting integrin αIIbβ3 activation...
September 27, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28953486/association-of-oxidative-stress-and-platelet-receptor-glycoprotein-gpib%C3%AE-and-gpvi-shedding-during-nonsurgical-bleeding-in-heart-failure-patients-with-continuous-flow-left-ventricular-assist-device-support
#11
Nandan K Mondal, Zengsheng Chen, Jaimin R Trivedi, Erik N Sorensen, Si M Pham, Mark S Slaughter, Bartley P Griffith, Zhongjun J Wu
Nonsurgical bleeding (NSB) in heart failure (HF) patients with continuous-flow left ventricular assist device (CF-LVAD) support is the most common clinical complication. The aim of this study was to investigate the association between oxidative stress and platelet glycoproteins GPIbα and GPVI shedding on the incidence of NSB in CF-LVAD patients. Fifty-one HF patients undergoing CF-LVAD implantation and 11 healthy volunteers were recruited. Fourteen patients developed NSB (bleeder group) during 1 month follow-up duration, while others were considered nonbleeder group (n = 37)...
September 26, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28952491/biophysical-tools-to-study-cellular-mechanotransduction
#12
REVIEW
Ismaeel Muhamed, Farhan Chowdhury, Venkat Maruthamuthu
The cell membrane is the interface that volumetrically isolates cellular components from the cell's environment. Proteins embedded within and on the membrane have varied biological functions: reception of external biochemical signals, as membrane channels, amplification and regulation of chemical signals through secondary messenger molecules, controlled exocytosis, endocytosis, phagocytosis, organized recruitment and sequestration of cytosolic complex proteins, cell division processes, organization of the cytoskeleton and more...
February 7, 2017: Bioengineering
https://www.readbyqxmd.com/read/28948953/evaluation-of-platelet-surface-glycoproteins-in-patients-with-glanzmann-thrombasthenia-association-with-bleeding-symptoms
#13
Deepti Mutreja, Rahul Kumar Sharma, Abhishek Purohit, Mukul Aggarwal, Renu Saxena
BACKGROUND & OBJECTIVES: Glanzmann thrombasthenia (GT) is a rare, inherited autosomal recessive disorder characterized by qualitative or quantitative deficiency of integrin αIIbβ3 [glycoprotein IIb (GPIIb)/IIIa, CD41/CD61] diagnosed by absent or reduced platelet aggregation to physiological agonists, namely, collagen, adenosine-di-phosphate, epinephrine and arachidonic acid. The objective of this study was to quantitate platelet surface GPs, classify GT patients and relate the results with the severity of bleeding and platelet aggregation studies...
May 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28943410/loss-of-reelin-protects-mice-against-arterial-thrombosis-by-impairing-integrin-activation-and-thrombus-formation-under-high-shear-conditions
#14
Nina Sarah Gowert, Irena Krüger, Meike Klier, Lili Donner, Friederike Kipkeew, Michael Gliem, Nicholas J Bradshaw, David Lutz, Sabrina Köber, Harald Langer, Sebastian Jander, Kerstin Jurk, Michael Frotscher, Carsten Korth, Hans H Bock, Margitta Elvers
Reelin is a secreted glycoprotein and essential for brain development and plasticity. Recent studies provide evidence that Reelin modifies platelet actin cytoskeletal dynamics. In this study we sought to dissect the contribution of Reelin in arterial thrombus formation. Here we analyzed the impact of Reelin in arterial thrombosis ex vivo and in vivo using Reelin deficient (reeler) and wildtype mice. We found that Reelin is secreted upon platelet activation and mediates signaling via glycoprotein (GP)Ib, the amyloid precursor protein (APP) and apolipoprotein E receptor 2 (ApoER2) to induce activation of Akt, extracellular signal-regulated kinase (Erk), SYK and Phospholipase Cγ2...
September 21, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28942157/control-of-cell-adhesion-and-proliferation-utilizing-polysaccharide-composite-film-scaffolds
#15
Kazutoshi Iijima, Yuna Tsuji, Izumi Kuriki, Atsushi Kakimoto, Yuichi Nikaido, Rie Ninomiya, Takuya Iyoda, Fumio Fukai, Mineo Hashizume
We have developed polysaccharide composite films made of anionic polysaccharides and chitosan (CHI) by utilizing hot press techniques. In order to demonstrate the versatility of these films as cell scaffolds, the present study investigated the adhesion and proliferation of fibroblasts on composite films prepared by using various kinds of anionic polysaccharides and that were modified with proteins. Cells were spread on heparin/CHI and alginic acid/CHI films and grew well, whereas those on chondroitin sulfate C (CS)/CHI and hyaluronic acid/CHI films were round in shape...
September 14, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28939911/cib1-protects-against-mptp-induced-neurotoxicity-through-inhibiting-ask1
#16
Kyoung Wan Yoon, Hyun-Suk Yang, Young Mok Kim, Yeonsil Kim, Seongman Kang, Woong Sun, Ulhas P Naik, Leslie V Parise, Eui-Ju Choi
Calcium and integrin binding protein 1 (CIB1) is a calcium-binding protein that was initially identified as a binding partner of platelet integrin αIIb. Although CIB1 has been shown to interact with multiple proteins, its biological function in the brain remains unclear. Here, we show that CIB1 negatively regulates degeneration of dopaminergic neurons in a mouse model of Parkinson's disease using 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Genetic deficiency of the CIB1 gene enhances MPTP-induced neurotoxicity in dopaminergic neurons in CIB1(-/-) mice...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28934202/platelet-dysfunction-contributes-to-bleeding-complications-in-patients-with-probable-leptospirosis
#17
Rahajeng N Tunjungputri, Muhammad Hussein Gasem, Willemijn van der Does, Pandu H Sasongko, Bambang Isbandrio, Rolf T Urbanus, Philip G de Groot, Andre van der Ven, Quirijn de Mast
BACKGROUND: Severe leptospirosis is frequently complicated by a hemorrhagic diathesis, of which the pathogenesis is still largely unknown. Thrombocytopenia is common, but often not to the degree that spontaneous bleeding is expected. We hypothesized that the hemorrhagic complications are not only related to thrombocytopenia, but also to platelet dysfunction, and that increased binding of von Willebrand factor (VWF) to platelets is involved in both platelet dysfunction and increased platelet clearance...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28931526/cellubrevin-vesicle-associated-membrane-protein-3-vamp-3-mediated-endocytosis-and-trafficking-regulate-platelet-functions
#18
Meenakshi Banerjee, Smita Joshi, Jinchao Zhang, Carole L Moncman, Shilpi Yadav, Beth A Bouchard, Brian Storrie, Sidney W Whiteheart
Endocytosis is key to fibrinogen (Fg) uptake, trafficking of integrins (αIIbβ3, αvβ3) and purinergic receptors (P2Y1, P2Y12), and thus for normal platelet function. However, the molecular machinery required and possible trafficking routes are still ill-defined. To further identify elements of the platelet endocytic machinery, we examined the role of a vesicle-residing, Soluble N-ethylmaleimide Factor Attachment Protein Receptor (v-SNARE) called Cellubrevin/Vesicle-Associated Membrane Protein-3 (VAMP-3) in platelet function...
September 20, 2017: Blood
https://www.readbyqxmd.com/read/28928125/ck2%C3%AE-critically-regulates-thrombopoiesis-and-ca-2-triggered-platelet-activation-in-arterial-thrombosis-in-vivo
#19
Patrick Münzer, Britta Walker-Allgaier, Sascha Geue, Friederike Langhauser, Eva Geuss, David Stegner, Katja Aurbach, Daniela Semeniak, Madhumita Chatterjee, Irene Gonzalez Menendez, Melanie Märklin, Leticia Quintanilla-Martinez, Helmut R Salih, David W Litchfield, Thierry Buchou, Christoph Kleinschnitz, Florian Lang, Bernhard Nieswandt, Irina Pleines, Harald Schulze, Meinrad Gawaz, Oliver Borst
Platelets, anucleated megakaryocyte-derived cells, play a major role in hemostasis and arterial thrombosis. While protein kinase Casein Kinase 2 (CK2) is readily detected in megakaryocytes and platelets, the impact of CK2-dependent signaling on megakaryocyte/platelet (patho-) physiology has remained elusive. The present study explored the impact of the CK2 regulatory β-subunit on platelet biogenesis and activation. Megakaryocyte/platelet-specific genetic deletion of CK2β (ck2β(-/-) ) in mice resulted in a significant macrothrombocytopenia and an increased extramedullar megakaryopoiesis with enhanced proportion of premature platelets...
September 19, 2017: Blood
https://www.readbyqxmd.com/read/28928091/p2y12-antibody-inhibits-platelet-activity-and-protects-against-thrombogenesis
#20
Nicole R Hensch, Zubair A Karim, Joshua Pineda, Nicole Mercado, Fatima Z Alshbool, Fadi T Khasawneh
Given that platelet hyperactivity is known to give rise to thrombotic disorders, new and/or novel antiplatelet therapies are constantly being developed to add to, or to complement the current arsenal of agents. To this end, adenosine diphosphate (ADP) is an important platelet activator that acts by binding to the G-protein coupled P2Y1 and P2Y12 receptors. Although the contribution of the P2Y12 receptor to the genesis of thrombosis is well established, the parenteral arsenal of drugs targeting this receptor in clinical use is limited to cangrelor...
November 18, 2017: Biochemical and Biophysical Research Communications
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