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Immature platelet

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https://www.readbyqxmd.com/read/29323256/splicing-of-platelet-resident-pre-mrnas-upon-activation-by-physiological-stimuli-results-in-functionally-relevant-proteome-modifications
#1
Giovanni Nassa, Giorgio Giurato, Giovanni Cimmino, Francesca Rizzo, Maria Ravo, Annamaria Salvati, Tuula A Nyman, Yafeng Zhu, Mattias Vesterlund, Janne Lehtiö, Paolo Golino, Alessandro Weisz, Roberta Tarallo
Platelet activation triggers thrombus formation in physiological and pathological conditions, such as acute coronary syndromes. Current therapies still fail to prevent thrombotic events in numerous patients, indicating that the mechanisms modulating platelet response during activation need to be clarified. The evidence that platelets are capable of de novo protein synthesis in response to stimuli raised the issue of how megakaryocyte-derived mRNAs are regulated in these anucleate cell fragments. Proteogenomics was applied here to investigate this phenomeon in platelets activated in vitro with Collagen or Thrombin Receptor Activating Peptide...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29314633/leucocyte-and-platelet-rich-fibrin-a-carrier-of-autologous-multipotent-cells-for-regenerative-medicine
#2
Rosa Di Liddo, Thomas Bertalot, Alessio Borean, Ivan Pirola, Alberto Argentoni, Sandra Schrenk, Carola Cenzi, Stefano Capelli, Maria Teresa Conconi, Pier Paolo Parnigotto
The wound healing is a complex process wherein inflammation, proliferation and regeneration evolve according to a spatio-temporal pattern from the activation of coagulation cascade to the formation of a plug clot including fibrin matrix, blood-borne cells and cytokines/growth factors. Creating environments conducive to tissue repair, the haemoderivatives are commonly proposed for the treatment of hard-to-heal wounds. Here, we explored in vitro the intrinsic regenerative potentialities of a leucocyte- and platelet-rich fibrin product, known as CPL-MB, defining the stemness grade of cells sprouting from the haemoderivative...
January 5, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29304534/platelet-function-in-itp-independent-of-platelet-count-is-consistent-over-time-and-is-associated-with-both-current-and-subsequent-bleeding-severity
#3
A L Frelinger, R F Grace, A J Gerrits, S L Carmichael, E E Forde, A D Michelson
BACKGROUND:  Treatment decisions for patients with immune thrombocytopenia (ITP) are difficult because patients with similarly low platelet counts differ in their bleeding tendency. We recently reported that platelet function tests, independent of platelet count, are associated with concurrent bleeding severity, suggesting that these tests may be useful indicators of future bleeding in ITP. OBJECTIVES:  To test this hypothesis, we evaluated the consistency of these platelet function tests over time and their association with subsequent bleeding severity...
January 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29286575/myh9-macrothrombocytopenia-caused-by-a-novel-variant-e1421k-initially-presenting-as-apparent-neonatal-alloimmune-thrombocytopenia
#4
Benjamin J Samelson-Jones, Paula M Kramer, Michael Chicka, William T Gunning Iii, Michele P Lambert
MYH9-related disease is a rare cause of thrombocytopenia. We report an infant girl who presented with severe thrombocytopenia at birth and was initially diagnosed with and treated for neonatal alloimmune thrombocytopenia. However, persistent thrombocytopenia led to the suspicion of congenital thrombocytopenia and subsequent identification of a novel variant in MYH9 (E1421K). In silico analysis strongly predicts that this is a disruptive substitution. Immunofluorescent analysis of neutrophils demonstrates abnormal aggregates of MYH9 protein...
December 29, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29259043/platelet-derived-growth-factor-bb-stimulates-differentiation-of-rat-immature-leydig-cells
#5
Yiyan Wang, Xiaoheng Li, Fei Ge, Kaiming Yuan, Zhijian Su, Guimin Wang, Qingquan Lian, Ren-Shan Ge
Platelet-derived growth factor (PDGF) is one family of growth factors that regulate cell growth and differentiation. Rat Leydig cells express PDGF-β receptor (PDGFRB) during pubertal development. However, the mechanism of PDGF in the regulation of Leydig cell development is unclear. In the present study, rat immature Leydig cells were isolated from the testes of 35-day-old Sprague-Dawley rats and treated with 1 and 10 ng/mL of PDGF-BB. After 24 h of treatment, these cells were harvested for genomics profiling and the medium steroids were measured...
January 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29187020/a-rare-case-of-pediatric-chronic-myelogenous-leukemia-presenting-with-severe-thrombocytosis-without-leukocytosis
#6
Albert N Huho, Niveen Issaq, Ionela Iacobas, Tarek M Elghetany, Dolores López-Terrada, Kevin E Fisher, Jyotinder N Punia
Pediatric chronic myelogenous leukemia is uncommon. We report a pediatric patient with chronic myelogenous leukemia presenting with a normal white blood cell count and no circulating immature myeloid cells. The patient presented with extreme thrombocytosis (platelet count range: 2175-3064 × 109/L) noted incidentally. No splenomegaly was found. Examination of the bone marrow aspirate revealed normal cellularity and normal myeloid: erythroid ratio with marked megakaryocytic hyperplasia. Molecular studies on the bone marrow aspirate detected both the major BCR/ABL1 p210 fusion transcript (9280 copies; p210/ ABL1 ratio: 38...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/29175435/antiplatelet-effect-of-aspirin-during-24h-in-patients-with-type-2-diabetes-without-cardiovascular-disease
#7
Liv Vernstrøm, Kristian Løkke Funck, Erik Lerkevang Grove, Esben Laugesen, Jonathan Mathias Baier, Anne-Mette Hvas, Per Løgstrup Poulsen
INTRODUCTION: The antiplatelet effect of low-dose aspirin in patients with type 2 diabetes (T2DM) without cardiovascular disease (CVD) has not been thoroughly explored. We investigated if platelet aggregation increased during the standard 24-hour aspirin dosing interval in patients with T2DM compared to non-diabetic controls. Furthermore, we evaluated baseline platelet aggregation, the acute effects of aspirin on platelet aggregation and platelet turnover. MATERIALS AND METHODS: We included 21 patients with T2DM and 21 age and sex-matched controls...
November 20, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29153694/evaluation-of-bone-marrow-function-with-immature-platelet-fraction-in-normal-pregnancy
#8
Ulrike Ratsch, Thorsten Kaiser, Holger Stepan, Alexander Jank
BACKGROUND: Bone marrow function in pregnancy is influencing blood cell concentration of platelets. The steady state of consumption, recovery and production of platelets is essential for coagulation and bleeding prevention. Reticulated platelets are an intermediate form of thrombocytes during thrombopoiesis representing platelet production. The immature platelet fraction (IPF) represents these platelets as percentage of all thrombocytes. Until now, there is little knowledge on IPF during pregnancy...
October 2017: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29141318/-ras-associated-autoimmune-leukoproliferative-disorder-a-report-of-2-cases-and-literature-review
#9
T Y He, C R Li, Y Xia, F F Liang, Y Luo, J Yang
Objective: To investigate the clinical features and genetic characteristics of cases with Ras-associated autoimmune leukoproliferative disorder(RALD). Method: Characteristics of clinical data and gene mutation of the first two cases in China with RALD were retrospectively analyzed. The related literature was searched by using search terms "NRAS" , "KRAS" or "RALD" . Result: Case1, a seven-year-seven-month old girl, was admitted due to "thrombocytopenia and splenomegaly for three years" . Palpation showed enlargement of submandibular lymph nodes and hepatosplenomegaly...
November 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29129292/targeting-myeloid-cells-in-the-tumor-sustaining-microenvironment
#10
REVIEW
Jonathan Schupp, Franziska K Krebs, Niklas Zimmer, Emily Trzeciak, Detlef Schuppan, Andrea Tuettenberg
Myeloid cells are the most abundant cells in the tumor microenvironment (TME). The tumor recruits and modulates endogenous myeloid cells to tumor-associated macrophages (TAM), dendritic cells (DC), myeloid-derived suppressor cells (MDSC) and neutrophils (TAN), to sustain an immunosuppressive environment. Pathologically overexpressed mediators produced by cancer cells like granulocyte-macrophage colony-stimulating- and vascular endothelial growth factor induce myelopoiesis in the bone marrow. Excess of myeloid cells in the blood, periphery and tumor has been associated with tumor burden...
November 2, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29117724/reference-intervals-for-absolute-and-percentage-immature-platelet-fraction-using-the-sysmex-xn-10-automated-haematology-analyser-in-a-uk-population
#11
Usman Ali, Gavin Knight, Roz Gibbs, Dimitris A Tsitsikas
BACKGROUND: Immature platelet fraction (IPF) estimation is a non-invasive and sensitive test that is available on recently introduced Sysmex XN-series of automated haematology analysers. It is a direct cellular indicator of thrombopoiesis. The aim of this study was to establish reference intervals for IPF, for both absolute (A-IPF) and percentage (%-IPF) measurements. MATERIAL AND METHODS: A total of 2366 samples that met the inclusion criteria were assayed for full blood count on the Sysmex XN-10 and a non-parametric percentile method was used for calculating the reference intervals...
November 9, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29116547/the-bpd-trio-interaction-of-dysregulated-pdgf-vegf-and-tgf-signaling-in-neonatal-chronic-lung-disease
#12
REVIEW
Prajakta Oak, Anne Hilgendorff
The development of neonatal chronic lung disease (nCLD), i.e., bronchopulmonary dysplasia (BPD) in preterm infants, significantly determines long-term outcome in this patient population. Risk factors include mechanical ventilation and oxygen toxicity impacting on the immature lung resulting in impaired alveolarization and vascularization. Disease development is characterized by inflammation, extracellular matrix remodeling, and apoptosis, closely intertwined with the dysregulation of growth factor signaling...
November 7, 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/29109319/histological-evaluation-of-the-effect-of-platelet-rich-plasma-on-pulp-regeneration-in-nonvital-open-apex-teeth-an-animal-study
#13
Jamileh Ghoddusi, Amir Maghsudlu, Hamid Jafarzadeh, Amirhossein Jafarian, Maryam Forghani
AIM: Platelet-rich plasma (PRP), which is a concentration of growth factors found in platelets, may be a suitable material for pulp regeneration. The aim of this animal study was a histological evaluation of PRP on pulp regeneration in nonvital teeth with immature apices. MATERIALS AND METHODS: A total of 40 premolar dogs' teeth were chosen for this study. After general anesthesia, the teeth were exposed, and subsequently, pulps were removed and the cavities were opened to the oral cavity...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29097774/altered-b-lymphopoiesis-in-mice-with-deregulated-thrombopoietin-signaling
#14
Amanda E Au, Marion Lebois, Starling A Sim, Ping Cannon, Jason Corbin, Pradnya Gangatirkar, Craig D Hyland, Diane Moujalled, Angelika Rutgersson, Fatme Yassinson, Benjamin T Kile, Kylie D Mason, Ashley P Ng, Warren S Alexander, Emma C Josefsson
Thrombopoietin (TPO) is the master cytokine regulator of megakaryopoiesis. In addition to regulation of megakaryocyte and platelet number, TPO is important for maintaining proper hematopoietic stem cell (HSC) function. It was previously shown that a number of lymphoid genes were upregulated in HSCs from Tpo (-/-) mice. We investigated if absent or enhanced TPO signaling would influence normal B-lymphopoiesis. Absent TPO signaling in Mpl (-/-) mice led to enrichment of a common lymphoid progenitor (CLP) signature in multipotential lineage-negative Sca-1(+)c-Kit(+) (LSK) cells and an increase in CLP formation...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29082748/impact-of-long-term-dual-antiplatelet-therapy-on-immature-platelet-count-and-platelet-reactivity
#15
Monica Verdoia, Patrizia Pergolini, Roberta Rolla, Lucia Barbieri, Alon Schaffer, Paolo Marino, Giorgio Bellomo, Harry Suryapranata, Giuseppe De Luca
The immature platelet count (IPC) is a potential marker of platelet reactivity. We assessed the relationship between IPC during chronic dual antiplatelet therapy (DAPT) and the response to antiplatelet drugs (acetylsalycilic acid + clopidogrel/ticagrelor). We included 286 patients: 167 (58.4%) patients received ticagrelor and 119 (41.6%) received clopidogrel. At a median follow-up of 46.5 days, the variation in IPC displayed an absolute median (interquartile range [IQR]) of -11.9 × 10(3)/µL (-182.7 to 160...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/29070128/-clinical-observation-of-therapeutic-regimen-consisted-of-decitabine-combined-with-low-dose-ia-regimen-for-myelodysplastic-syndrome-eb
#16
Di Wu, Jin-Xia Hao, Jing Li, Mei Zhang
OBJECTIVE: To investigate the clinical efficacy of decitabine combined with low-dose IA for treating patients with myelodysplastic syndrome-EB. METHODS: Thirty-seven cases of myelodysplastic syndrome-EB patients diagnosed in the First Affiliated Hospital of Xi'an Jiaotong University from June 2015 to January 2017 were analyzed retrospectively. These patients accepted DAC+IA(19 cases) and DAC(18 cases) treatment separately, and the differences of clinical efficacy between them were compared...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29069007/successful-eltrombopag-treatment-of-severe-refractory-thrombocytopenia-in-chronic-myelomonocytic-leukemia-two-cases-reports-a-care-compliant-article
#17
Yayue Gao, Ming Gong, Chunxia Zhang, Xudong Kong, Yigai Ma
RATIONALE: Thrombocytopenia in chronic myelomonocytic leukemia (CMML) is usually attributed to impaired marrow production resulting from cytotoxic drug use or CMML itself ("CMML-induced thrombocytopenia"). In very rare cases, immune thrombocytopenia (ITP) can be a complication of CMML ("CMML-associated ITP"). However, treatment of severe thrombocytopenia in patients with CMML is still a challenge. PATIENT CONCERNS: Case 1 was a 61-year-old female patient admitted to our hospital because of skin petechiae and purpura for 6 days...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29027117/immature-platelet-fraction-ipf-as-a-predictive-value-for-thrombopoietic-recovery-after-allogeneic-stem-cell-transplantation
#18
Mikiko Sakuragi, Satoru Hayashi, Miho Maruyama, Tomoko Kiyokawa, Keisuke Nagamine, Jiro Fujita, Tetsuo Maeda, Hisashi Kato, Hirokazu Kashiwagi, Yuzuru Kanakura, Yoshiaki Tomiyama
We consecutively examined the utility of measurements of percentage of immature platelet fraction (IPF%) and absolute IPF number (A-IPF) in predicting thrombopoietic recovery in 15 adult patients who underwent allogeneic hematopoietic stem cell transplantation (allo-SCT). Four patients were excluded from the evaluation due to insufficient data. Platelet count and IPF were measured by Sysmex XN-1000 (XN), a newer generation analyzer. First, we confirmed that platelet count measured by XN was more accurate than by XE-2100 (XE)...
October 12, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/29019594/allogeneic-mesenchymal-stem-cells-and-xenogenic-platelet-rich-plasma-associated-or-not-in-the-repair-of-bone-failures-in-rabbits-with-secondary-osteoporosis
#19
Mariá Andrade de Carvalho Rocha, Laís Meireles Costa Silva, Wellson Andrade de Oliveira, Dayseanny de Oliveira Bezerra, Gustavo Cardoso da Silva, Lucilene Dos Santos Silva, Brenda Lurian do Nascimento Medeiros, Sílvia de Araújo França Baêta, Maria Acelina Martins de Carvalho, Napoleão Martins Argôlo
PURPOSE: To assess the efficacy of allogeneic mesenchymal stem cells and xenogenic platelet rich plasma in the treatment of bone failure of osteoporotic rabbits secondary to estrogenic deprivation and iatrogenic hypercortisolism. METHODS: Eight female rabbits underwent ovarian resection and corticoid therapy to induce clinical status of osteoporosis. Four failures were produced in the tibiae, with each failure being treated with hemostatic sponge, allogenic mesenchymal stem cells, xenogenic platelet-rich plasma and the association between both...
September 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28988440/immature-platelet-fraction-in-immune-thrombocytopenia-useful-in-diagnosis-but-does-it-predict-bleeding
#20
Alan D Michelson
No abstract text is available yet for this article.
October 8, 2017: Pediatric Blood & Cancer
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