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https://www.readbyqxmd.com/read/28922716/quaternary-ammonium-groups-modified-starch-microspheres-for-instant-hemorrhage-control
#1
Fangping Chen, Xiaoyan Cao, Junxia Yu, Huantong Su, Shuda Wei, Hua Hong, Changsheng Liu
Instant rapid hemostasis is crucial not only for decreasing mortality in these conditions, but also for optimal recovery. The hemostatic agents on the market suffer from inefficiency hemostasis, nondegradability, high cost and potential safety issues. It is necessary to develop a hemostatic agent with rapid hemostatic performance, potent biodegradation and improved biocompatibility. The aim of this work was to develop a novel type of cationic modified starch microspheres (CS) and investigate its hemostatic performance...
August 24, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28922713/peppermint-essential-oil-alleviates-hyperglycemia-caused-by-streptozotocin-nicotinamide-induced-type-2-diabetes-in-rats
#2
Suhair A Abdellatief, Rasha R Beheiry, Shefaa A M El-Mandrawy
The prevalence of diabetes mellitus is steadily growing throughout the world. Traditional medicine has an excellent potential in the treatment of diabetes mellitus. The present study was undertaken to evaluate the potential antidiabetic effect of peppermint essential oil (PEO) on streptozotocin (STZ) and nicotinamide induced diabetic rats. Diabetes was induced in rats fasting overnight by the intraperitoneal administration of nicotinamide followed by a single dose of STZ. After 72h, two groups of diabetic rats were treated with different doses of PEO (40 and 80mg/kg BW) respectively and one group was treated with the standard hypoglycemic agent glibenclamide...
September 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922631/surface-modification-of-platelet-concentrate-bags-to-reduce-biofilm-formation-and-transfusion-sepsis
#3
Joels S T Wilson-Nieuwenhuis, Nina Dempsey-Hibbert, Christopher M Liauw, Kathryn A Whitehead
Bacterial contamination of blood products poses a major risk in transfusion medicine, including transfusions involving platelet products. Although testing systems are in place for routine screening of platelet units, the formation of bacterial biofilms in such units may decrease the likelihood that bacteria will be detected. This work determined the surface properties of p-PVC platelet concentrate bags and investigated how these characteristics influenced biofilm formation. Serratia marcescens and Staphylococcus epidermidis, two species commonly implicated in platelet contamination, were used to study biofilm growth...
September 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28922541/effects-of-collagen-peptides-intake-on-skin-ageing-and-platelet-release-in-chronologically-aged-mice-revealed-by-cytokine-array-analysis
#4
Hongdong Song, Ling Zhang, Yongkang Luo, Siqi Zhang, Bo Li
Action mechanisms underlying various biological activities of collagen peptides (CPs) remained to be elucidated. Cytokines may play an important role in mediating these health benefits of CPs. This study aimed to systemically examine the cytokines in skin and blood regulated by CPs intake. Thirteen-month-old female Kunming mice were administered with CPs for 2 months (0 or 400 mg/kg bodyweight/day). The cytokines in skin and plasma were analysed using a 53-cytokine array and corresponding ELISA kits. In skin, CPs intake significantly down-regulated placenta growth factor (PIGF-2), insulin-like growth factor (IGF)-binding protein (IGFBP) -2 and IGFBP-3, and up-regulated platelet factor 4 (PF4), serpin E1 and transforming growth factor (TGF)-β1 ...
September 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28922440/real-life-use-of-3-direct-acting-antiviral-regimen-in-a-large-cohort-of-patients-with-genotype-1b-hcv-compensated-cirrhosis
#5
Liana Gheorghe, Speranta Iacob, Manuela Curescu, Ciprian Brisc, Cristina Cijevschi, Florin Caruntu, Carol Stanciu, Iulia Simionov, Ioan Sporea, Cristian Gheorghe, Razvan Iacob, Victoria Arama, Roxana Sirli, Anca Trifan
BACKGROUND AND AIMS: Ombitasvir/Paritaprevir/ritonavir/Dasabuvir (OBV/PTV/r+DSV) is one of the elective direct-acting antivirals (DAAs) recommended by international guidelines and the only one covered by the National Insurance System in Romania until November 2016. Our aim was to present the first prospective Romanian cohort evaluating the effectiveness and safety in clinical practice of this 3DAA combination in patients with HCV genotype-1b Child A liver cirrhosis. METHODS: 681 patients received OBV/PTV/r+DSV+RBV for 12 weeks and were assessed clinically and biologically at baseline, week 4, 8, 12 (end of treatment, EOT), and 12 weeks after therapy (sustained viral response, SVR)...
September 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28922391/impedance-biosensor-for-real-time-monitoring-and-prediction-of-thrombotic-individual-profile-in-flowing-blood
#6
Denise De Zanet, Monica Battiston, Elisabetta Lombardi, Ruben Specogna, Francesco Trevisan, Luigi De Marco, Antonio Affanni, Mario Mazzucato
A new biosensor for the real-time analysis of thrombus formation is reported. The fast and accurate monitoring of the individual thrombotic risk represents a challenge in cardiovascular diagnostics and in treatment of hemostatic diseases. Thrombus volume, as representative index of the related thrombotic status, is usually estimated with confocal microscope at the end of each in vitro experiment, without providing a useful behavioral information of the biological sample such as platelets adhesion and aggregation in flowing blood...
2017: PloS One
https://www.readbyqxmd.com/read/28922385/metabolomics-analyses-identify-platelet-activating-factors-and-heme-breakdown-products-as-lassa-fever-biomarkers
#7
Trevor V Gale, Timothy M Horton, Donald S Grant, Robert F Garry
Lassa fever afflicts tens of thousands of people in West Africa annually. The rapid progression of patients from febrile illness to fulminant syndrome and death provides incentive for development of clinical prognostic markers that can guide case management. The small molecule profile of serum from febrile patients triaged to the Viral Hemorrhagic Fever Ward at Kenema Government Hospital in Sierra Leone was assessed using untargeted Ultra High Performance Liquid Chromatography Mass Spectrometry. Physiological dysregulation resulting from Lassa virus (LASV) infection occurs at the small molecule level...
September 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28922227/incidence-and-risk-factors-of-coagulation-profile-derangement-after-liver-surgery-implications-for-the-use-of-epidural-analgesia-a-retrospective-cohort-study
#8
Pierre Jacquenod, Grégoire Wallon, Mathieu Gazon, Benjamin Darnis, Pierre Pradat, Victor Virlogeux, Olivier Farges, Frédéric Aubrun
BACKGROUND: Hepatic surgery is a major abdominal surgery. Epidural analgesia may decrease the incidence of postoperative morbidities. Hemostatic disorders frequently occur after hepatic resection. Insertion or withdrawal (whether accidental or not) of an epidural catheter during coagulopathic state may cause an epidural hematoma. The aim of the study is to determine the incidence of coagulopathy after hepatectomy, interfering with epidural catheter removal, and to identify the risk factors related to coagulopathy...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28922205/impact-of-advanced-age-on-survival-in-patients-undergoing-resection-of-hepatocellular-carcinoma-report-of-a-japanese-nationwide-survey
#9
Masaki Kaibori, Kengo Yoshii, Isao Yokota, Kiyoshi Hasegawa, Fumio Nagashima, Shoji Kubo, Masanori Kon, Namiki Izumi, Masumi Kadoya, Masatoshi Kudo, Takashi Kumada, Michiie Sakamoto, Osamu Nakashima, Yutaka Matsuyama, Tadatoshi Takayama, Norihiro Kokudo
OBJECTIVE: The impact of age on survival after hepatic resection for hepatocellular carcinoma (HCC) has not been thoroughly examined. We reviewed the data of a nationwide follow-up survey to determine the outcomes of hepatectomy for HCC in elderly patients. BACKGROUND: Management of malignant diseases in elderly patients has become a global clinical issue because of the increased life expectancy worldwide. Advancements in surgical techniques and perioperative management have reduced age-related contraindications for liver surgery...
September 15, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28922143/leukocyte-reduced-platelet-rich-plasma-stimulates-the-in-vitro-proliferation-of-adipose-tissue-derived-mesenchymal-stem-cells-depending-on-pdgf-signaling
#10
Siegmund Lang, Marietta Herrmann, Christian Pfeifer, Gero Brockhoff, Johannes Zellner, Michael Nerlich, Peter Angele, Lukas Prantl, Sebastian Gehmert, Markus Loibl
BACKGROUND: Platelet-rich Plasma (PRP) is suggested as xenoprotein-free cell-culture medium replacement for animal-derived supplements. OBJECTIVE: The aim of this study was to investigate PRP-triggered signaling in adipose derived mesenchymal stem cells (ASCs). METHODS: PRP was obtained from 4 male patients. We incubated ASCs in α-MEM with different Platelet derived growth factor (PDGF) subtypes or 10% or 20% pooled PRP or 20% fetal calf serum (FCS) prior to determination of the S-phase fraction (SPF)...
September 11, 2017: Clinical Hemorheology and Microcirculation
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
#11
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...
September 17, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28921624/pharmacodynamics-and-pharmacokinetics-of-ticagrelor-versus-clopidogrel-in-patients-with-acute-coronary-syndromes-and-chronic-kidney-disease
#12
Heyang Wang, Jing Qi, Yi Li, Yunbiao Tang, Chao Li, Jing Li, Yaling Han
BACKGROUND: Pivotal clinical trials found ticagrelor reduced ischemic complications to a greater extent than clopidogrel and what is more, the benefit gradually increased with the reduction on creatinine clearance. However, the underlying mechanisms remains poorly explored. METHODS: This is a single-center, prospective, randomized clinical trial involving 60 hospitalized P2Y12 inhibitor naïve patients with CKD (eGFR<60ml/min/1.73m(2) ) and NSTE-ACS. Eligible patients were randomly assigned in a 1:1 ratio to receive ticagrelor(180 mg loading dose, then 90 mg twice daily followed) or clopidogrel(600 mg loading dose, then 75 mg qd followed)...
September 15, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28921552/immunomodulatory-effect-of-cryopreserved-platelets-altered-bdca3-dendritic-cell-maturation-and-activation-in-vitro
#13
Katrina K Ki, Lacey Johnson, Helen M Faddy, Robert L Flower, Denese C Marks, Melinda M Dean
BACKGROUND: Cryopreservation of platelets (PLTs) is useful in remote areas to overcome logistic problems associated with supply and can extend the shelf life to 2 years. During cryopreservation, properties of PLTs are modified. Whether changes in the cryopreserved PLT (CPP) product are associated with modulation of recipients' immune function is unknown. We aimed to characterize the immune profile of myeloid dendritic cells (mDCs) and the specialized blood DC antigen (BDCA)3(+) subset after exposure to CPPs...
September 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28921542/pathogen-inactivation-of-dengue-virus-in-red-blood-cells-using-amustaline-and-glutathione
#14
Maite Aubry, Andrew Laughhunn, Felicia Santa Maria, Marion C Lanteri, Adonis Stassinopoulos, Didier Musso
BACKGROUND: Dengue virus (DENV) is an arbovirus primarily transmitted through mosquito bite; however, DENV transfusion-transmitted infections (TTIs) have been reported and asymptomatic DENV RNA-positive blood donors have been identified in endemic countries. DENV is considered a high-risk pathogen for blood safety. One of the mitigation strategies to prevent arbovirus TTIs is pathogen inactivation. In this study we demonstrate that the amustaline and glutathione (S-303/GSH) treatment previously found effective against Zika virus in red blood cells (RBCs) is also effective in inactivating DENV...
September 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28921447/structure-pharmacology-and-roles-in-physiology-of-the-p2y12-receptor
#15
Ivar von Kügelgen
P2Y receptors are G-protein-coupled receptors (GPCRs) for extracellular nucleotides. The platelet ADP-receptor which has been denominated P2Y12 receptor is an important target in pharmacotherapy. The receptor couples to Gαi2 mediating an inhibition of cyclic AMP accumulation and additional downstream events including the activation of phosphatidylinositol-3-kinase and Rap1b proteins. The nucleoside analogue ticagrelor and active metabolites of the thienopyridine compounds ticlopidine, clopidogrel and prasugrel block P2Y12 receptors and, thereby, inhibit ADP-induced platelet aggregation...
September 12, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28920964/directed-emission-of-cdse-nanoplatelets-originating-from-strongly-anisotropic-2d-electronic-structure
#16
Riccardo Scott, Jan Heckmann, Anatol V Prudnikau, Artsiom Antanovich, Aleksandr Mikhailov, Nina Owschimikow, Mikhail Artemyev, Juan I Climente, Ulrike Woggon, Nicolai B Grosse, Alexander W Achtstein
Intrinsically directional light emitters are potentially important for applications in photonics including lasing and energy-efficient display technology. Here, we propose a new route to overcome intrinsic efficiency limitations in light-emitting devices by studying a CdSe nanoplatelets monolayer that exhibits strongly anisotropic, directed photoluminescence. Analysis of the two-dimensional k-space distribution reveals the underlying internal transition dipole distribution. The observed directed emission is related to the anisotropy of the electronic Bloch states governing the exciton transition dipole moment and forming a bright plane...
September 18, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28920906/clotchip-a-microfluidic-dielectric-sensor-for-point-of-care-assessment-of-hemostasis
#17
Debnath Maji, Michael A Suster, Erdem Kucukal, Ujjal D S Sekhon, Anirban Sen Gupta, Umut A Gurkan, Evi X Stavrou, Pedram Mohseni
This paper describes the design, fabrication, and testing of a microfluidic sensor for dielectric spectroscopy of human whole blood during coagulation. The sensor, termed ClotChip, employs a three-dimensional, parallel-plate, capacitive sensing structure with a floating electrode integrated into a microfluidic channel. Interfaced with an impedance analyzer, the ClotChip measures the complex relative dielectric permittivity, ϵ Tr, of human whole blood in the frequency range of 40 Hz to 100 MHz. The temporal variation in the real part of the blood dielectric permittivity at 1 MHz features a time to reach a permittivity peak, Tpeak, as well as a maximum change in permittivity after the peak, ∆εr,max, as two distinct parameters of ClotChip readout...
September 12, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28920416/effects-of-aflatoxin-b1-combined-with-ochratoxin-a-and-or-zearalenone-on-metabolism-immune-function-and-antioxidant-status-in-lactating-dairy-goats
#18
Shuai Huang, Nan Zheng, CaiYun Fan, Ming Cheng, Shang Wang, Adil Jabar, JiaQi Wang, JianBo Cheng
Objective: This experiment was conducted to investigate the effects of aflatoxin B1 (AFB1) alone or mixed with ochratoxin A (OTA) and/or zearalenone (ZEA) on the metabolism, immune function, and antioxidant status of dairy goats. Methods: Fifty lactating Laoshan dairy goats were randomly assigned to one of five treatment groups (n = 10) for 14 days. Goats were fed no additive (control) or administered with 50 μg AFB1/kg DM (AFB1), 50 μg AFB1/kg DM + 100 μg OTA/kg DM (AFB1+OTA), 50 μg AFB1/kg DM + 500 μg ZEA/kg DM (AFB1+ZEA), or 50 μg AFB1/kg DM + 100 μg OTA/kg DM + 500 μg ZEA/kg DM (AFB1+OTA+ZEA)...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28920085/baseline-prescription-and-one-year-persistence-of-secondary-prevention-drugs-after-an-index-stroke-in-central-ghana
#19
Fred Stephen Sarfo, Bruce Ovbiagele, John Akassi, Gloria Kyem
BACKGROUND AND PURPOSE: There is a paucity of data on persistence of secondary prevention medications among stroke survivors in resource-limited settings where stroke is on a rapid upward trajectory and its management severely challenged. To avert new cardiovascular events after stroke, preventive medications should be promptly instituted and used continuously. We report 1-year rates and determinants of persistent utilization of secondary prevention therapies after stroke in Ghana. METHODS: A retrospective observational study involving 418 stroke survivors enrolled into a Neurology clinic in a tertiary institution in central Ghana between January 2011 and December 2013...
March 2017: ENeurologicalSci
https://www.readbyqxmd.com/read/28919829/age-and-sex-related-changes-in-hematological-parameters-in-healthy-malawians
#20
Wilson L Mandala, Esther N Gondwe, Jenny M MacLennan, Malcolm E Molyneux, Calman A MacLennan
AIM: The aim of the study was to determine how values for white blood cell (WBC) counts, hemoglobin (Hb), hematocrit (Hct), mean corpuscular volume (mcv), and platelet counts vary with age and sex in healthy Malawians. METHODS: We recruited 660 (316 male and 344 female) participants in 12 different age groups. An ethylenediaminetetraacetic acid-anticoagulated blood sample collected from each participant was analyzed using a hematological analyzer. RESULTS: WBC counts decreased with age with the lowest counts observed in the 20 to <60 years old group...
2017: Journal of Blood Medicine
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