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Immature platelet fraction

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https://www.readbyqxmd.com/read/29519292/-evaluation-of-platelet-function-in-critically-ill-patients-and-its-clinical-significance
#1
Hepeng Fu, Yuxiang Zhang
Platelets play a pivotal role in the thromboembolic, inflammatory, and immunomodulatory process. The alteration of platelet quality often affects the treatment and prognosis of critically ill patients, and has a significant correlation with mortality. With the further research on the function of the platelet, it is found that the abnormal platelet quality can present during the early stage of the illness of the critically ill patients. In order to evaluate the alterations of the platelet quality more accurately, the further studies of platelet parameters, including platelet counts (PLT), platelet hematocrit (PCT), platelet large cell ratio (PLCR), mean platelet volume (MPV), platelet distribution width (PDW), immature platelet fraction (IPF) and so on, are still be the focus of current researches in the field of critical illness...
March 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29472803/reference-interval-for-immature-platelet-fraction-on-sysmex-xn-haematology-analyser-in-adult-population
#2
Claudia E Imperiali, Ariadna Arbiol-Roca, Lourdes Sanchez-Navarro, Macarena Dastis-Arias, Juan C Lopez-Delgado, Anna Cortes-Bosch, Ana Sancho-Cerro, Dolors Dot-Bach
Introduction: The Sysmex XN-series haematology analyser has newly adopted a fluorescent channel to measure immature platelet fraction (IPF). To promote the clinical utility of this promising parameter, establishing a reliable reference interval is mandatory. According to previous studies, IPF values may be affected by the employed analyser and the ethnic background of the individual, but no differences seem to be found between individuals' genders. Therefore, this study aimed to define the reference interval for IPF in a Spanish population following Clinical and Laboratory Standard Institute (CLSI) guidelines...
February 15, 2018: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29438423/immature-platelet-fraction-and-thrombopoietin-in-patients-with-liver-cirrhosis-a-cohort-study
#3
Philip Rauber, Frank Lammert, Katharina Grotemeyer, Beate Appenrodt
BACKGROUND AND AIMS: Thrombocytopenia occurs frequently in patients with cirrhosis. The immature platelet fraction (IPF%) is measured to differentiate the causes of thrombocytopenia. To date the relevance of thrombopoietin (TPO) in the context of cirrhosis is unknown. The aim of our study was to investigate the cause of thrombocytopenia in patients with liver cirrhosis by measuring IPF%, TPO and spleen size. In addition we examined the use of IPF% to evaluate the severity of cirrhosis and its complications...
2018: PloS One
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
#4
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
#5
Benjamin J Samelson-Jones, Paula M Kramer, Michael Chicka, William T Gunning, 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...
April 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29153694/evaluation-of-bone-marrow-function-with-immature-platelet-fraction-in-normal-pregnancy
#6
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/29117724/reference-intervals-for-absolute-and-percentage-immature-platelet-fraction-using-the-sysmex-xn-10-automated-haematology-analyser-in-a-uk-population
#7
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/29097774/altered-b-lymphopoiesis-in-mice-with-deregulated-thrombopoietin-signaling
#8
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/29027117/immature-platelet-fraction-ipf-as-a-predictive-value-for-thrombopoietic-recovery-after-allogeneic-stem-cell-transplantation
#9
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/28988440/immature-platelet-fraction-in-immune-thrombocytopenia-useful-in-diagnosis-but-does-it-predict-bleeding
#10
Alan D Michelson
No abstract text is available yet for this article.
February 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28932736/mean-platelet-volume-and-immature-platelet-fraction-in-autoimmune-disorders
#11
REVIEW
Deonilson Schmoeller, Maria Mercedes Picarelli, Terezinha Paz Munhoz, Carlos Eduardo Poli de Figueiredo, Henrique Luiz Staub
Mean platelet volume (MPV), measured using automated blood analysers, has been appraised as a potential biomarker in cardiovascular disease, diabetes mellitus, and cancer. The test, a useful tool in differentiation of thrombocytopenic states, has now been carried out for autoimmune disorders, but data are yet scarce. Controversial results have been obtained in systemic and organ-specific autoimmune disorders. Another test, the immature platelet fraction (IPF) reflects the amount of young, reticulated platelets...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28921855/utility-of-the-immature-platelet-fraction-in-pediatric-immune-thrombocytopenia-differentiating-from-bone-marrow-failure-and-predicting-bleeding-risk
#12
Alicia McDonnell, Karen L Bride, Derick Lim, Michele Paessler, Char M Witmer, Michele P Lambert
BACKGROUND: Differentiating childhood immune thrombocytopenia (ITP) from other cause of thrombocytopenia remains a diagnosis of exclusion. Additionally factors that predict bleeding risk for those patients with ITP are currently not well understood. Previous small studies have suggested that immature platelet fraction (IPF) may differentiate ITP from other causes of thrombocytopenia and in combination with other factors may predict bleeding risk. METHODS: We performed a retrospective chart review of thrombocytopenic patients with an IPF measured between November 1, 2013 and July 1, 2015...
February 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28880458/determinants-of-platelet-count-in-pediatric-patients-with-congenital-cyanotic-heart-disease-role-of-immature-platelet-fraction
#13
Randa M Matter, Iman A Ragab, Alaa M Roushdy, Ahmed G Ahmed, Hanan H Aly, Eman A Ismail
OBJECTIVES: Congenital heart defects are common noninfectious causes of mortality in children. Bleeding and thrombosis are both limiting factors in the management of such patients. We assessed the frequency of thrombocytopenia in pediatric patients with congenital cyanotic heart disease (CCHD) and evaluated determinants of platelet count including immature platelet fraction (IPF) and their role in the pathogenesis of thrombocytopenia. METHODS: Forty-six children and adolescents with CCHD during pre-catheter visits were studied; median age was 20...
September 7, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28879549/decreased-platelet-count-in-children-with-epilepsy-treated-with-valproate-and-its-relationship-to-the-immature-platelet-fraction
#14
Hirokazu Kurahashi, Akiyoshi Takami, Kenta Murotani, Shingo Numoto, Akihisa Okumura
This study examined relationships between valproate (VPA) and platelet count and immature platelet fraction (IPF). We compared the platelet count and IPF among three groups of children: those treated with VPA, those treated with other antiepileptic drugs (AEDs), and a reference group. IPF was measured using flow cytometry, and absolute immature platelet count (A-IPC) was calculated. The platelet count was significantly lower in the VPA group than in other AED and reference groups. In all groups, IPF was negatively correlated with platelet count...
January 2018: International Journal of Hematology
https://www.readbyqxmd.com/read/28865245/the-sh2b3-and-kcnk5-loci-may-be-implicated-in-regulation-of-platelet-count-volume-and-maturity
#15
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)...
October 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28611471/evaluation-of-the-immature-platelet-fraction-contribute-to-the-differential-diagnosis-of-hereditary-immune-and-other-acquired-thrombocytopenias
#16
F L B Ferreira, M P Colella, S S Medina, C Costa-Lima, M M L Fiusa, L N G Costa, F A Orsi, J M Annichino-Bizzacchi, K Y Fertrin, M F P Gilberti, M C Ozelo, E V De Paula
The differential diagnosis of immune (ITP) and hereditary macrothrombocytopenia (HM) is key to patient management. The immature platelet fraction (IPF) represents the subset of circulating platelets with higher RNA content, and has been shown to distinguish hypo- from hyperproliferative thrombocytopenias. Here we evaluated the diagnostic accuracy of IPF in the differential diagnosis between HM and other thrombocytopenias in a population of patients with post-chemotherapy thrombocytopenia (n = 56), bone marrow failure (n = 22), ITP (n = 105) and HM (n = 27)...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28562514/actn1-related-macrothrombocytopenia-a-novel-entity-in-the-progressing-field-of-pediatric-thrombocytopenia
#17
Helene Boutroux, Bianca David, Paul Guéguen, Pierre Frange, Anne Vincenot, Guy Leverger, Rémi Favier
The most common cause of thrombocytopenia in children is immune thrombocytopenia. Nevertheless, some atypical cases should evoke the hypothesis of genetic thrombocytopenia. Indeed, in the past years, 30 new genes had been described in the field of inherited thrombocytopenia. We report a series of 11 cases of a newly diagnosed entity: ACTN1-related macrothrombocytopenia. Mutations in the gene ACTN1 cause mild macrothrombocytopenia characterized by elevated mean platelet volume and elevated immature platelet fraction, and low bleeding tendency...
November 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28548028/developmental-differences-between-newborn-and-adult-mice-in-response-to-romiplostim
#18
Katherine A Sparger, Haley Ramsey, Viola Lorenz, Zhi-Jian Liu, Henry A Feldman, Nan Li, Tahirih Laforest, Martha C Sola-Visner
Thrombocytopenia is frequent among sick neonates. While most cases are transient, some neonates experience prolonged and severe thrombocytopenia. These infants often pose diagnostic and therapeutic challenges, and may receive large numbers of platelet transfusions. Romiplostim (ROM) is a thrombopoietin (TPO)-receptor-agonist approved for treatment of adults with chronic immune thrombocytopenia (ITP). The immature platelet fraction (IPF) is a novel measure of newly produced platelets, which could aid with the diagnostic evaluation of thrombocytopenic neonates...
May 26, 2017: Platelets
https://www.readbyqxmd.com/read/28479317/biological-variation-of-platelet-parameters-determined-by-the-sysmex-xn-hematology-analyzer
#19
Sabrina Buoro, Michela Seghezzi, Barbara Manenti, Aurelio Pacioni, Anna Carobene, Ferruccio Ceriotti, Cosimo Ottomano, Giuseppe Lippi
BACKGROUND: This study was aimed to define the short- and medium-term biological variation (BV) estimates, the index of individuality and the reference change value (RCV) of platelet count, platelet distribution width, mean platelet volume, platelet larger cell ratio, plateletcrit and immature platelet fraction. METHODS: The study population consisted of 43 health subjects, who participated to the assessment of medium-term (21 subjects; blood sampling once a week for 5 consecutive weeks) and short-term (22 subjects; blood sampling once a day for 5 consecutive days) BV study, using Sysmex XN-module...
July 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28394090/analysis-of-platelet-derived-extracellular-vesicles-in-plateletpheresis-concentrates-a-multicenter-study
#20
MULTICENTER STUDY
Anne Black, Evelyn Orsó, Reinhard Kelsch, Melanie Pereira, Julian Kamhieh-Milz, Abdulgabar Salama, Michael B Fischer, Eduardo Meyer, Beat M Frey, Gerd Schmitz
BACKGROUND: Routine quantification of platelet-derived extracellular vesicles (PL-EVs) may be useful in the quality control (QC) of platelet concentrates (PCs). The aim of this multicenter study was to establish and validate a consensus protocol for the standardized PL-EV quantification using conventional flow cytometers. STUDY DESIGN AMD METHODS: Eighty-six PCs were investigated in five blood transfusion centers (A-E) on Days 0 and 5. The centers used different apheresis instruments: Trima Accel (n = 56) and/or Amicus (n = 30)...
June 2017: Transfusion
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