keyword
MENU ▼
Read by QxMD icon Read
search

thrombopoiesis

keyword
https://www.readbyqxmd.com/read/28865245/the-sh2b3-and-kcnk5-loci-may-be-implicated-in-regulation-of-platelet-count-volume-and-maturity
#1
Morten K Christiansen, Sanne B Larsen, Mette Nyegaard, Søs Neergaard-Petersen, Morten Würtz, Erik L Grove, Anne-Mette Hvas, Henrik K Jensen, Steen D Kristensen
INTRODUCTION: In recent genome-wide association studies, coronary artery disease (CAD) and myocardial infarction (MI) have been linked to a number of genetic variants, but their role in thrombopoiesis is largely unknown. AIM: We investigated the association between CAD and MI-associated genetic variants and five thrombopoiesis-related indices: platelet count (PC), mean platelet volume (MPV), immature platelet count (IPC), immature platelet fraction (IPF), and serum thrombopoietin (TPO)...
August 18, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28821815/epac1-deficient-mice-have-bleeding-phenotype-and-thrombocytes-with-decreased-gpib%C3%AE-expression
#2
Gyrid Nygaard, Lars Herfindal, Kathrine S Asrud, Ronja Bjørnstad, Reidun K Kopperud, Eystein Oveland, Frode S Berven, Lene Myhren, Erling A Hoivik, Turid Helen Felli Lunde, Marit Bakke, Stein O Døskeland, Frode Selheim
Epac1 (Exchange protein directly activated by cAMP 1) limits fluid loss from the circulation by tightening the endothelial barrier. We show here that Epac1(-/-) mice, but not Epac2(-/-) mice, have prolonged bleeding time, suggesting that Epac1 may limit fluid loss also by restraining bleeding. The Epac1(-/-) mice had deficient in vitro secondary hemostasis. Quantitative comprehensive proteomics analysis revealed that Epac1(-/-) mouse platelets (thrombocytes) had unbalanced expression of key components of the glycoprotein Ib-IX-V (GPIb-IX-V) complex, with decrease of GP1bβ and no change of GP1bα...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28752663/platelet-production-from-induced-pluripotent-stem-cells
#3
N Sugimoto, K Eto
Ex vivo production of human platelets has been pursued as an alternative measure to resolve limitations in the supply and safety of current platelet transfusion products. To this end, induced pluripotent stem cells (iPSCs) are considered an ideal global source, as they are not only pluripotent and self-renewing, but are also available from basically any person, have relatively few ethical issues, and are easy to manipulate. From human iPSCs, megakaryocyte (MK) lines with robust proliferation capacity have been established by the introduction of specified sets of genes...
July 28, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28743899/thrombopoiesis-is-spatially-regulated-by-the-bone-marrow-vasculature
#4
David Stegner, Judith M M vanEeuwijk, Oğuzhan Angay, Maximilian G Gorelashvili, Daniela Semeniak, Jürgen Pinnecker, Patrick Schmithausen, Imke Meyer, Mike Friedrich, Sebastian Dütting, Christian Brede, Andreas Beilhack, Harald Schulze, Bernhard Nieswandt, Katrin G Heinze
In mammals, megakaryocytes (MKs) in the bone marrow (BM) produce blood platelets, required for hemostasis and thrombosis. MKs originate from hematopoietic stem cells and are thought to migrate from an endosteal niche towards the vascular sinusoids during their maturation. Through imaging of MKs in the intact BM, here we show that MKs can be found within the entire BM, without a bias towards bone-distant regions. By combining in vivo two-photon microscopy and in situ light-sheet fluorescence microscopy with computational simulations, we reveal surprisingly slow MK migration, limited intervascular space, and a vessel-biased MK pool...
July 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28730545/platelet-first-responders-in-wound-response-cancer-and-metastasis
#5
REVIEW
David G Menter, Scott Kopetz, Ernest Hawk, Anil K Sood, Jonathan M Loree, Paolo Gresele, Kenneth V Honn
Platelets serve as "first responders" during normal wounding and homeostasis. Arising from bone marrow stem cell lineage megakaryocytes, anucleate platelets can influence inflammation and immune regulation. Biophysically, platelets are optimized due to size and discoid morphology to distribute near vessel walls, monitor vascular integrity, and initiate quick responses to vascular lesions. Adhesion receptors linked to a highly reactive filopodia-generating cytoskeleton maximizes their vascular surface contact allowing rapid response capabilities...
July 20, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28693791/etv6-and-etv7-siblings-in-hematopoiesis-and-its-disruption-in-disease
#6
REVIEW
Parisa Rasighaemi, Alister C Ward
ETV6 (TEL1) and ETV7 (TEL2) are closely-related members of the ETS family of transcriptional regulators. Both ETV6 and ETV7 have been demonstrated to play key roles in hematopoiesis, particularly with regard to maintenance of hematopoietic stem cells and control of lineage-specific differentiation, with evidence of functional interactions between both proteins. ETV6 has been strongly implicated in the molecular etiology of a number of hematopoietic diseases, including as a tumor suppressor, an oncogenic fusion partner, and an important regulator of thrombopoiesis, but recent evidence has also identified ETV7 as a potential oncogene in certain malignancies...
August 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28641133/abc-transporters-in-megakaryopoiesis-and-platelet-activity
#7
REVIEW
Wei Wang, Lorena Buitrago, Ying Wang
ATP-binding cassette (ABC) is a family of transporters that facilitates the translocation of substrates across cell membrane using its ATPase subunit. These transporters have key roles in multidrug resistance, lipid homeostasis, antigen processing, immunity, cell proliferation and hematopoiesis. Some ABC transporters are selectively expressed on megakaryocyte progenitor, megakaryocyte and its cellular fragment platelet. However, the role of ABC transporters in hemostasis and thrombosis were not well explored until recently...
June 14, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28570944/oral-feeding-with-polyunsaturated-fatty-acids-fosters-hematopoiesis-and-thrombopoiesis-in-healthy-and-bone-marrow-transplanted-mice
#8
Kedar Limbkar, Ankita Dhenge, Dipesh D Jadhav, Hirekodathakallu V Thulasiram, Vaijayanti Kale, Lalita Limaye
Hematopoietic stem cells play the vital role of maintaining appropriate levels of cells in blood. Therefore, regulation of their fate is essential for their effective therapeutic use. Here we report the role of polyunsaturated fatty acids (PUFAs) in regulating hematopoiesis which has not been explored well so far. Mice were fed daily for 10 days with n-6/n-3 PUFAs, viz. linoleic acid (LA), arachidonic acid (AA), alpha-linolenic acid and docosahexanoic acid (DHA) in four separate test groups with phosphate-buffered saline fed mice as control set...
May 17, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28490570/mouse-runx1c-regulates-premegakaryocytic-erythroid-output-and-maintains-survival-of-megakaryocyte-progenitors
#9
Julia E Draper, Patrycja Sroczynska, Hui Sun Leong, Muhammad Z H Fadlullah, Crispin Miller, Valerie Kouskoff, Georges Lacaud
RUNX1 is crucial for the regulation of megakaryocyte specification, maturation, and thrombopoiesis. Runx1 possesses 2 promoters: the distal P1 and proximal P2 promoters. The major protein isoforms generated by P1 and P2 are RUNX1C and RUNX1B, respectively, which differ solely in their N-terminal amino acid sequences. RUNX1C is the most abundantly expressed isoform in adult hematopoiesis, present in all RUNX1-expressing populations, including the cKit(+) hematopoietic stem and progenitor cells. RUNX1B expression is more restricted, being highly expressed in the megakaryocyte lineage but downregulated during erythropoiesis...
July 20, 2017: Blood
https://www.readbyqxmd.com/read/28473904/from-chronic-immune-thrombocytopenia-to-severe-aplastic-anemia-recent-insights-into-the-evolution-of-eltrombopag
#10
REVIEW
Harinder Gill, Raymond S M Wong, Yok-Lam Kwong
Thrombopoietin (TPO) is the most potent cytokine stimulating thrombopoiesis. Therapy with exogenous TPO is limited by the formation of antibodies cross-reacting with endogenous TPO. Mimetics of TPO are compounds with no antigenic similarity to TPO. Eltrombopag is an orally-active nonpeptide small molecule that binds to the transmembrane portion of the TPO receptor MPL. Initial trials of eltrombopag have centered on immune thrombocytopenia (ITP), which is due to both increased destruction and decreased production of platelets...
May 2017: Therapeutic Advances in Hematology
https://www.readbyqxmd.com/read/28449596/changes-in-platelet-count-and-size-indices-in-adolescent-patients-with-anorexia-nervosa
#11
Joanna Oświęcimska, Żaneta Malczyk, Agnieszka Szymlak, Agata Mikołajczak, Katarzyna Ziora, Jacek Zamlynski, Edyta Machura, Piotr Zajac, Bogdan Koczy, Alicja Kasperska-Zajac
The significance of platelet size indices has not been widely analyzed in anorexia nervosa (AN). It seems important to get more knowledge on the easily available indices of platelet function obtained by routine complete blood count analysis in patients with AN. We analyzed platelet count (PLT), platelet distribution width (PDW), and mean platelet volume using an automated blood cell counter in 25 females with AN and healthy age- and gender-matched nonatopic controls. Mean PLT was significantly lower in patients with AN than in the control group...
September 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28432223/fli1-level-during-megakaryopoiesis-affects-thrombopoiesis-and-platelet-biology
#12
Karen K Vo, Danuta J Jarocha, Randolph B Lyde, Vincent Hayes, Christopher S Thom, Spencer K Sullivan, Deborah L French, Mortimer Poncz
Friend leukemia virus integration 1 (FLI1), a critical transcription factor (TF) during megakaryocyte differentiation, is among genes hemizygously deleted in Jacobsen syndrome, resulting in a macrothrombocytopenia termed Paris-Trousseau syndrome (PTSx). Recently, heterozygote human FLI1 mutations have been ascribed to cause thrombocytopenia. We studied induced-pluripotent stem cell (iPSC)-derived megakaryocytes (iMegs) to better understand these clinical disorders, beginning with iPSCs generated from a patient with PTSx and iPSCs from a control line with a targeted heterozygous FLI1 knockout (FLI1(+/-))...
June 29, 2017: Blood
https://www.readbyqxmd.com/read/28408900/the-thrombopoietin-receptor-structural-basis-of-traffic-and-activation-by-ligand-mutations-agonists-and-mutated-calreticulin
#13
REVIEW
Leila N Varghese, Jean-Philippe Defour, Christian Pecquet, Stefan N Constantinescu
A well-functioning hematopoietic system requires a certain robustness and flexibility to maintain appropriate quantities of functional mature blood cells, such as red blood cells and platelets. This review focuses on the cytokine receptor that plays a significant role in thrombopoiesis: the receptor for thrombopoietin (TPO-R; also known as MPL). Here, we survey the work to date to understand how this receptor functions at a molecular level throughout its lifecycle, from traffic to the cell surface, dimerization and binding cognate cytokine via its extracellular domain, through to its subsequent activation of associated Janus kinases and initiation of downstream signaling pathways, as well as the regulation of these processes...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28391511/normal-and-pathological-dynamics-of-platelets-in-humans
#14
Gabriel P Langlois, Morgan Craig, Antony R Humphries, Michael C Mackey, Joseph M Mahaffy, Jacques Bélair, Thibault Moulin, Sean R Sinclair, Liangliang Wang
We develop a mathematical model of platelet, megakaryocyte, and thrombopoietin dynamics in humans. We show that there is a single stationary solution that can undergo a Hopf bifurcation, and use this information to investigate both normal and pathological platelet production, specifically cyclic thrombocytopenia. Carefully estimating model parameters from laboratory and clinical data, we then argue that a subset of parameters are involved in the genesis of cyclic thrombocytopenia based on clinical information...
April 8, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28388313/arachidonic-acid-and-docosahexanoic-acid-enhance-platelet-formation-from-human-apheresis-derived-cd34-cells
#15
Ankita Dhenge, Kedar Limbkar, Sameer Melinkeri, Vaijayanti Prakash Kale, Lalita Limaye
An Aberration in megakaryopoiesis and thrombopoiesis, 2 important processes that maintain hemostasis, leads to thrombocytopenia. Though platelet transfusions are used to treat this condition, blood banks frequently face a shortage of platelets. Therefore, methods to generate platelets on a large scale are strongly desirable. However, to generate megakaryocytes (MKs) and platelets (PLTs) in numbers sufficient for clinical application, it is essential to understand the mechanism of platelet production and explore efficient strategies accordingly...
May 19, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28279968/newly-formed-reticulated-platelets-undermine-pharmacokinetically-short-lived-antiplatelet-therapies
#16
COMPARATIVE STUDY
Paul C Armstrong, Thomas Hoefer, Rebecca B Knowles, Arthur T Tucker, Melissa A Hayman, Plinio M Ferreira, Melissa V Chan, Timothy D Warner
OBJECTIVE: Aspirin together with thienopyridine P2Y12 inhibitors, commonly clopidogrel, is a cornerstone of antiplatelet therapy. However, many patients receiving this therapy display high on-treatment platelet reactivity, which is a major therapeutic hurdle to the prevention of recurrent thrombotic events. The emergence of uninhibited platelets after thrombopoiesis has been proposed as a contributing factor to high on-treatment platelet reactivity. Here, we investigate the influences of platelet turnover on platelet aggregation in the face of different dual-antiplatelet therapy strategies...
May 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28253829/emerging-drugs-for-immune-thrombocytopenia-itp
#17
REVIEW
Abdulgabar Salama
Immune thrombocytopenia (ITP) is an autoimmune disorder characterized by autoantibody production against platelets, increased platelet destruction, and, in some cases, impaired thrombopoiesis. The majority of affected patients have significant bleeding risks due to low platelet counts and require treatment. The etiology of ITP is an immunological labyrinth. Currently available treatment options are usually not only nonspecific, but are also associated with some risks. Areas covered: Several useful drugs for the treatment of ITP are currently available...
March 2017: Expert Opinion on Emerging Drugs
https://www.readbyqxmd.com/read/28149021/prevalence-of-factor-v-leiden-g1691a-and-mthfr-c677t-thrombosis-gene-modifier-in-iron-deficiency-anemia-a-pathophysiological-effect-in-indian-isolates
#18
S K Pandey, S Pandey, R M Mishra, M Indurkar
Normal iron levels are required to prevent thrombocytosis by inhibiting thrombopoiesis. Thrombocytosis is usually associated with a mild iron deficiency and is the result of a lack of inhibition of thrombopoiesis. Study participants were 430 iron deficiency anemia (IDA) patients. Ten (10) mL of venous blood were collected for the subjects. Ferritin analysis was done by ELISA method while Hemogram analysis was done by auto-analyzer. Factor V Leiden, PRTG20210A, and MTHFR C677T genotype analysis was performed by PCR-RFLP method...
March 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28112988/platelet-bioreactor-accelerated-evolution-of-design-and-manufacture
#19
Jonathan N Thon, Brad J Dykstra, Lea M Beaulieu
Platelets, responsible for clot formation and blood vessel repair, are produced by megakaryocytes in the bone marrow. Platelets are critical for hemostasis and wound healing, and are often provided following surgery, chemotherapy, and major trauma. Despite their importance, platelets today are derived exclusively from human volunteer donors. They have a shelf life of just five days, making platelet shortages common during long weekends, civic holidays, bad weather, and during major emergencies when platelets are needed most...
July 2017: Platelets
https://www.readbyqxmd.com/read/28057742/dual-role-of-il-21-in-megakaryopoiesis-and-platelet-homeostasis
#20
Salima Benbarche, Catherine Strassel, Catherine Angénieux, Léa Mallo, Monique Freund, Christian Gachet, François Lanza, Henri de la Salle
Gene profiling studies have indicated that in vitro differentiated human megakaryocytes express the receptor for IL-21 (IL-21R), an immunostimulatory cytokine associated with inflammatory disorders and currently under evaluation in cancer therapy. The aim of this study was to investigate whether IL-21 modulates megakaryopoiesis. We first checked the expression of IL-21 receptor on human bone marrow and in vitro differentiated megakaryocytes. We then investigated the effect of IL-21 on the in vitro differentiation of human blood CD34(+) progenitors into megakaryocytes...
April 2017: Haematologica
keyword
keyword
113826
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"