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Neonatal Platelets

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https://www.readbyqxmd.com/read/28794456/activated-nk-cells-cause-placental-dysfunction-and-miscarriages-in-fetal-alloimmune-thrombocytopenia
#1
Issaka Yougbaré, Wei-She Tai, Darko Zdravic, Brigitta Elaine Oswald, Sean Lang, Guangheng Zhu, Howard Leong-Poi, Dawei Qu, Lisa Yu, Caroline Dunk, Jianhong Zhang, John G Sled, Stephen J Lye, Jelena Brkić, Chun Peng, Petter Höglund, B Anne Croy, S Lee Adamson, Xiao-Yan Wen, Duncan J Stewart, John Freedman, Heyu Ni
Miscarriage and intrauterine growth restriction (IUGR) are devastating complications in fetal/neonatal alloimmune thrombocytopenia (FNAIT). We previously reported the mechanisms for bleeding diatheses, but it is unknown whether placental, decidual immune cells or other abnormalities at the maternal-fetal interface contribute to FNAIT. Here we show that maternal immune responses to fetal platelet antigens cause miscarriage and IUGR that are associated with vascular and immune pathologies in murine FNAIT models...
August 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28780584/platelet-derived-growth-factor-alpha-pdgfr%C3%AE-induces-the-activation-of-cardiac-fibroblasts-by-activating-c-kit
#2
Lexun Wang, Yuan Yue, Xiao Yang, Tian Fan, Bo Mei, Jian Hou, Mengya Liang, Guangxian Chen, Zhongkai Wu
BACKGROUND Enhanced platelet-derived growth factor receptor a (PDGFRα) signaling pathway activity leads to cardiac fibrosis. However, because of the pleiotropic effects of PDGFR signaling, its role in mediating the cardiac fibrotic response remains poorly understood. This study aimed to investigate the regulatory effect of c-Kit in cardiac fibroblasts activated by PDGFRa signaling. MATERIAL AND METHODS A cardiac fibrosis mice model was induced using isoproterenol, and the heart tissues of mice were tested through western blotting and real-time quantitative PCR (RT-qPCR)...
August 6, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28769143/zonulin-a-potential-marker-of-intestine-injury-in-newborns
#3
Anna Tarko, Anna Suchojad, Marta Michalec, Małgorzata Majcherczyk, Aniceta Brzozowska, Iwona Maruniak-Chudek
INTRODUCTION: Zonulin (ZO), a new diagnostic biomarker of intestinal permeability, was tested in newborns presenting symptoms of infection and/or inflammation of the gut or being at risk of intestinal pathology. MATERIAL AND METHODS: Serum ZO was assessed in 81 newborns diagnosed with sepsis, necrotizing enterocolitis (NEC), rotavirus infection, and gastroschisis, also in extremely low gestational age babies, and in controls (healthy newborns). ZO concentration was compared to C-reactive protein (CRP) and procalcitonin (PCT) values, leucocyte and platelet count, basic demographic data, and the value of the Neonatal Therapeutic Intervention Scoring System (NTISS)...
2017: Disease Markers
https://www.readbyqxmd.com/read/28761638/mean-platelet-volume-and-serum-uric-acid-in-neonatal-sepsis-a-case-control-study
#4
Mohsen M Shalaby, Ahmad A Sobeih, Waleed E Abdulghany, Eman G Behiry, Yasser M Ismail, Mahmoud A Abd-El-Aziz
BACKGROUND: Mean platelet volume (MPV) is a measure of platelet volume. It reveals the presence of inflammatory burden and disease activity in many diseases. Serum uric acid (SUA) is one of the most important antioxidants in human biological fluids and is responsible for neutralizing > 50% of the free radicals in the human blood. For this reason, it was thought that the antioxidant effects of SUA could increase the life expectancy and/or reduce the incidence of malignancy. OBJECTIVES: To determine the role of mean platelet volume (MPV) and serum uric acid (SUA) level in the diagnosis of neonatal sepsis (NS)...
August 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28759157/mtor-notch3-signaling-mediates-pulmonary-hypertension-in-hypoxia-exposed-neonatal-rats-independent-of-changes-in-autophagy
#5
Julijana Ivanovska, Sparsh Shah, Mathew J Wong, Crystal Kantores, Amish Jain, Martin Post, Behzad Yeganeh, Robert P Jankov
BACKGROUND/AIM: Mammalian target of rapamycin (mTOR) is a pivotal regulator of cell proliferation, survival, and autophagy. Autophagy is increased in adult experimental chronic pulmonary hypertension (PHT), but its contributory role to pulmonary vascular disease remains uncertain and has yet to be explored in the neonatal animal. Notch is a major pro-proliferative pathway activated by mTOR. A direct relationship between autophagy and Notch signaling has not been previously explored. Our aim was to examine changes in mTOR-, Notch-, and autophagy-related pathways and the therapeutic effects of autophagy modulators in experimental chronic neonatal PHT secondary to chronic hypoxia...
July 31, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28737473/association-between-the-high-soluble-fms-like-tyrosine-kinase-1-to-placental-growth-factor-ratio-and-adverse-outcomes-in-asymptomatic-women-with-early-onset-fetal-growth-restriction
#6
Satoshi Shinohara, Yuzo Uchida, Mayuko Kasai, Rei Sunami
OBJECTIVE: To assess whether the high soluble fms-like tyrosine kinase-1 (sFlt-1) to placental growth factor (PlGF) ratio is associated with adverse outcomes (e.g., HELLP syndrome [hemolysis, elevated liver enzymes, and low platelets], severe hypertension uncontrolled by medication, non-reassuring fetal status, placental abruption, pulmonary edema, growth arrest, maternal death, or fetal death) and a shorter duration to delivery in early-onset fetal growth restriction (FGR). METHODS: Thirty-four women with FGR diagnosed at <34...
July 24, 2017: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/28734690/salivary-c-reactive-protein-mean-platelet-volume-and-neutrophil-lymphocyte-ratio-as-diagnostic-markers-for-neonatal-sepsis
#7
Ahmed Omran, Abdallah Maaroof, Mai H Saleh, Amina Abdelwahab
OBJECTIVE: To assess the applicability of salivary C-reactive protein (CRP), mean platelet volume (MPV), neutrophil-lymphocyte ratio (NLR), and platelet lymphocyte ratio (PLR) in the diagnosis of neonatal sepsis. METHODS: Prospective case-control study of 70 full-term neonates, 35 with sepsis (20 with proven sepsis and 15 with clinical sepsis) and 35 healthy controls. Serum and salivary CRP concentrations were measured by ELISA while MPV, NLR, and PLR were measured by automated blood cell counter...
July 20, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28727130/the-utility-of-maternal-mean-platelet-volume-levels-for-early-onset-neonatal-sepsis-prediction-of-term-infants
#8
Yasemin Cekmez, Merve Dizdar Güleçoğlu, Cemile Özcan, Leyla Karadeniz, Gürkan Kıran
OBJECTIVES: This study is aimed to evaluate the role of maternal mean platelet volume (MPV) levels for antenatal prediction marker of early onset neonatal sepsis in term infants born to mothers who have low infection risk. MATERIAL AND METHODS: A total of 62 pregnant women who gave birth in our hospital and whose neonates were admitted to a third level Neonatal Intensive Care Unit due to confirmed neonatal sepsis between January 2010 and May 2016 were selected as a study group...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28723784/thrombocytopenia-in-pregnancy-with-different-diagnoses-differential-clinical-features-treatments-and-outcomes
#9
MULTICENTER STUDY
Xiaoyue Wang, Yan Xu, Wenxiang Luo, Hui Feng, Yizhou Luo, Yanli Wang, Hui Liao
To investigate the clinical features and perinatal treatment of thrombocytopenia induced by different causes during pregnancy.Clinical data from 195 pregnant women with thrombocytopenia attending 2 tertiary hospitals from January 2014 to October 2016 were retrospectively studied. The obtained data were analyzed with SPSS 19.0 software.There were 117 (60.0%), 55 (28.2%), and 23 cases (11.8%) of pregnancy-associated thrombocytopenia (PAT), idiopathic thrombocytopenia (ITP), and hypertensive disorder in pregnancy (PIH), respectively...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28718264/malignant-infantile-osteopetrosis
#10
Saima Gillani, Zaheer Abbas
Two main forms of osteopetrosis are recognized, a severe autosomal recessive form (MIM 259700) with an incidence of approximately 1 in 250,000 births and a mild autosomal dominant form (MIM166600) with an incidence of 1 in 20,000 births. Intrinsic disturbances of osteoclastic function due to mutations in genes encoding osteoclast-specific subunits of the vacuolar proton pump (TCIRG1, CLCN7) are found in most patients with recessive form. Mutations of CLCN7 are observed in dominant form of osteopetrosis .The recessive form of ostreopetrosis, i...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28714327/elevated-levels-of-circulating-cell-free-dna-and-neutrophil-proteins-are-associated-with-neonatal-sepsis-and-necrotizing-enterocolitis-in-immature-mice-pigs-and-infants
#11
Duc Ninh Nguyen, Allan Stensballe, Jacqueline Cy Lai, Pingping Jiang, Anders Brunse, Yanqi Li, Jing Sun, Carina Mallard, Tom Skeath, Nicholas D Embleton, Janet E Berrington, Per T Sangild
Preterm infants are highly susceptible to late-onset sepsis (LOS) and necrotizing enterocolitis (NEC), but disease pathogenesis and specific diagnostic markers are lacking. Circulating cell-free DNA (cfDNA) and immune cell-derived proteins are involved in multiple immune diseases in adults but have not been investigated in preterm neonates. We explored the relation of circulating neutrophil-associated proteins and cfDNA to LOS and/or NEC. Using a clinically relevant preterm pig model of spontaneous LOS and NEC development, we investigated neutrophil-associated proteins and cfDNA in plasma, together with cytokines in gut tissues...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/28694568/the-role-of-routine-measurement-of-intra-abdominal-pressure-in-preventing-abdominal-compartment-syndrome
#12
G Raghavendra Prasad, J V Subba Rao, Amtul Aziz, T M Rashmi
INTRODUCTION: Abdomen, a closed compartment, is prone to raised intra-abdominal pressure (IAP) in the postoperative period. After a critical value of ≥ 15 cm of water, IAP produces abdominal compartment syndrome (ACS). ACS leads to reduced venous return, reduced cardiac output, and domino effect of organ dysfunction, leading to death. Hence, it is the need of hour to monitor IAP to pick up intra-abdominal hypertension (IAH) and ACS. This routine facilitates early institution of treatment measures...
July 2017: Journal of Indian Association of Pediatric Surgeons
https://www.readbyqxmd.com/read/28689228/impact-of-a-rapid-molecular-test-for-positive-blood-cultures-from-neonatal-intensive-care-patients-on-clinical-management-a-retrospective-audit
#13
L L Koh, S O'Rourke, M Brennan, L Clooney, M Cafferkey, N McCallion, R J Drew
BACKGROUND: Both Staphylococcus aureus and coagulase negative Staphylococci are common causes of late-onset neonatal sepsis in the neonatal intensive care unit (NICU), usually relating to intravascular access device infections. AIMS: This project aimed to review the impact on antimicrobial treatment and clinical outcome in the NICU setting, of the introduction of the Xpert MRSA/SA BC test (Cepheid, USA) for the identification of staphylococci in blood cultures. METHODS: A retrospective audit was carried out of the pre- and post-intervention periods; the intervention was the introduction of the Xpert MRSA/SA BC test...
July 8, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28686909/unraveling-the-role-of-maternal-anti-hla-class-i-antibodies-in-fetal-and-neonatal-thrombocytopenia-antibody-specificity-analysis-using-epitope-data
#14
Jesper Dahl, Erle Refsum, Maria Therese Ahlen, Torstein Egeland, Tore Jensen, Marte K Viken, Tor Brynjar Stuge, Ganesh Acharya, Anne Husebekk, Bjørn Skogen, Heidi Tiller
Anti-HLA class I antibodies have been suggested as a possible cause of fetal and neonatal alloimmune thrombocytopenia (FNAIT). The aim of this study was to characterize maternal anti-HLA class I alloantibodies in suspected cases of FNAIT. The study population consisted of all nationwide referrals of neonates with suspected FNAIT to the National Unit for Platelet Immunology in Tromsø, Norway, during 1998-2009 (cases), and 250 unselected pregnancies originally included in a prospective study (controls). Inclusion criterion was a positive screening for maternal anti-HLA class I antibodies...
June 27, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28684918/genotype-and-phenotype-correlation-in-intracranial-hemorrhage-in-neonatal-factor-vii-deficiency-among-thai-children
#15
Chanchai Traivaree, Chalinee Monsereenusorn, Arunotai Meekaewkunchorn, Premsak Laoyookhong, Saranya Suwansingh, Boonchai Boonyawat
Congenital factor VII (FVII) deficiency is a rare inherited coagulopathy. The clinical manifestations and clinical findings vary widely, ranging from asymptomatic to life-threatening bleeding, including intracranial hemorrhage (ICH), with prolonged prothrombin time, normal partial thromboplastin time and normal platelet counts, which are confirmed by the low level of FVII assay. Treatment consists of fresh frozen plasma (FFP), prothrombin complex concentrates (PCCs), and recombinant activated FVII to treat bleeding and prophylactic therapy...
2017: Application of Clinical Genetics
https://www.readbyqxmd.com/read/28679510/neonatal-alloimmune-thrombocytopaenia-associated-with-maternal-hla-antibodies
#16
Kristina Wendel, Çiğdem Akalin Akkök, Stefan Kutzsche
Neonatal alloimmune thrombocytopaenia (NAIT) generally results from platelet opsonisation by maternal antibodies against fetal platelet antigens inherited from the infant's father. Newborn monochorionic twins presented with petechial haemorrhages at 10 hours of life, along with severe thrombocytopaenia. Despite the initial treatment with platelet transfusions and intravenous immunoglobulin, they both had persistent thrombocytopaenia during their first 45 days of life. Class I human leucocyte antigen (HLA) antibodies with broad specificity against several HLA-B antigens were detected in the maternal serum...
July 5, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28678046/coagulation-profile-is-not-a-predictor-of-acute-cerebrovascular-events-in-pediatric-extracorporeal-membrane-oxygenation-patients
#17
Pilar Anton-Martin, Janna Journeycake, Vinai Modem, Sailaja Golla, Lakshmi Raman, Jefferson Tweed, Cindy Darnell-Bowens
We performed a retrospective matched case-control study evaluating whether the traditional coagulation profile predicts cerebrovascular events in children on extracorporeal membrane oxygenation (ECMO) in a 71 bed intensive care unit at a tertiary children's hospital. Between 2009 and 2014, 241 neonates and children were initiated on ECMO. The cumulative 5 year incidence of intracranial hemorrhage and infarct was 9.2% and 7.9%, respectively. Thirty-six cases were individually matched 1:1 with control subjects based on age, primary diagnosis, ECMO type, cannulation site, and the presence of pre-ECMO coagulopathy...
July 3, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28673503/-thirty-years-of-platelet-immunology-in-fetal-and-neonatal-alloimmune-thrombocytopenia-management-current-situation
#18
R Petermann
Fetal and neonatal allo-immune thrombocytopenia (FNAIT) is considered as a rare disease due to the incidence (1/1000-1/2000 births). The major complication of severe thrombocytopenia is bleeding and particularly intra-cranial hemorrhage and neurologic sequelae following. Serology and molecular biology developments have reconfigured the platelet immunology diagnosis. Anti-HPA-1a allo-immunisation is responsible for more than 80% FNAIT cases with a high recurrence rate of severe bleeding complications. Therapeutic management has changed over the coming years from an invasive concept associating fetal blood sampling and in utero platelet transfusion to a non invasive treatment by intravenous immunoglobulins injection (IVIg)...
June 30, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28672769/reference-intervals-and-longitudinal-changes-in-copeptin-and-mr-proadm-concentrations-during-pregnancy
#19
Annemiek M C P Joosen, Ivon J M van der Linden, Lianne Schrauwen, Alisia Theeuwes, Monique J M de Groot, Antonius A M Ermens
BACKGROUND: Vasopressin and adrenomedullin and their stable by-products copeptin and midregional part of proadrenomedullin (MR-proADM) are promising biomarkers for the development of preeclampsia. However, clinical use is hampered by the lack of trimester-specific reference intervals. We therefore estimated reference intervals for copeptin and MR-proADM in disease-free Dutch women throughout pregnancy. METHODS: Apparently healthy low risk pregnant women were recruited...
June 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28658797/effect-of-single-dose-betamethasone-administration-in-pregnancy-on-maternal-and-newborn-parameters
#20
Komal Gaur, Barna Ganguly
INTRODUCTION: Antenatal corticosteroids play an important role in preventing Respiratory Distress Syndrome (RDS) but benefits related to time between corticosteroid administration and delivery need to be explored. AIM: To observe the effect of betamethasone administration in pregnant women at risk of preterm delivery and on foetal parameters, in terms of development of RDS. MATERIALS AND METHODS: It was a prospective observational study on pregnant women at risk of preterm delivery who were administered a single dose 24 mg injection betamethasone...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
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