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https://www.readbyqxmd.com/read/29304404/stable-gadolinium-based-nanoscale-lyophilized-injection-for-enhanced-mr-angiography-with-efficient-renal-clearance
#1
Kun Liu, Liang Dong, Yunjun Xu, Xu Yan, Fei Li, Yang Lu, Wei Tao, Huangyong Peng, Yadong Wu, Yang Su, Daishun Ling, Tao He, Haisheng Qian, Shu-Hong Yu
There is a great demand to develop high-relaxivity nanoscale contrast agents for magnetic resonance (MR) angiography with high resolution. However, there should be more focus on stability, ion leakage and excretion pathway of the intravenously injected nanoparticles, which are closely related to their clinic potentials. Herein, uniform ultrasmall-sized NaGdF4 nanocrystal (sub-10 nm) was synthesized using a facile high temperature organic solution method, and the nanocrystals were modified by a ligand-exchange approach using PEG-PAA di-block copolymer...
December 28, 2017: Biomaterials
https://www.readbyqxmd.com/read/29303610/how-to-interpret-elevated-plasmatic-level-of-high-sensitive-troponin-t-in-newborns-and-infants
#2
P Jehlicka, M Huml, D Rajdl, A Mockova, M Matas, J Dort, A Masopustova
Research and clinical implications on novel cardiac biomarkers has intensified significantly in the past few years. The high-sensitive troponin T (hscTnT) assay plays a dominant role in diagnostic algorithm regarding myocardial injury in adults. Despite generally accepted use of hscTnT there are no data about physiological concentrations and cut-off limits in neonates and infants to date. The aim of this study is to assess hscTnT levels in healthy newborns and infants. Consecutively 454 healthy full termed newborns and 40 healthy infants were enrolled in the study...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29301818/massive-intravascular-haemolysis-due-to-clostridium-perfringens
#3
Shunichi Shibazaki, Tomohisa Yasumoto, Taisuke Nakaizumi
No abstract text is available yet for this article.
January 4, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29275011/red-blood-cells-the-primary-reservoir-of-macrophage-migration-inhibitory-factor-in-whole-blood
#4
Elisabeth Karsten, Cameron J Hill, Benjamin R Herbert
Red blood cells are widely accepted to be inert carriers of oxygen and haemoglobin, but there is growing evidence that they play a much more critical role in immune function. Macrophage migration inhibitory factor (MIF) is a key cytokine in disease with additional oxido-reductase activity, which aids in managing oxidative stress. Although two studies have reported the presence of MIF in red blood cells, no study has quantified the levels of this protein. In this study, freshly isolated plasma, platelets, leukocytes, and red blood cells from healthy individuals were collected and the concentration of MIF was determined using an enzyme linked immunosorbent assay...
December 21, 2017: Cytokine
https://www.readbyqxmd.com/read/29258275/synthesis-and-biocompatibility-studies-of-new-iminodiacetic-acid-derivatives
#5
Magdalena Markowicz-Piasecka, Piotr Dębski, Elżbieta Mikiciuk-Olasik, Joanna Sikora
BACKGROUND: Iminodiacetic acid (IDA) derivatives can be used as ligands to form complexes with technetium, with potential application as hepatobiliary diagnostic agents. The aim of this study was to synthesize five novel IDA derivatives and to compare their effects on plasma haemostasis with clinically approved ligands for technetium complexation. METHODS: The influence of synthesized IDA derivatives on plasma haemostasis was evaluated spectrophotometrically by clot formation and lysis test (CL-test), coagulation assay, Prothrombin Time and Activated Partial Tromboplastin Time...
December 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29246924/the-prothrombotic-state-in-paroxysmal-nocturnal-haemoglobinuria-a-multifaceted-source
#6
Barnaby Peacock-Young, Fraser L Macrae, Darren J Newton, Anita Hill, Robert A S Ariëns
Paroxysmal nocturnal haemoglobinuria is a rare acquired haematological disorder, the most serious complication of which is thrombosis. The increased incidence of thrombosis in paroxysmal nocturnal haemoglobinuria is still poorly understood, but unlike many other thrombotic disorders, predominantly involves complement mediated mechanisms. This review article discusses the different factors that contribute to the increased risk of thrombosis in paroxysmal nocturnal haemoglobinuria. Paroxysmal nocturnal haemoglobinuria leads to a complex and multifaceted prothrombotic state due to the pathological effects of platelet activation, intravascular haemolysis and neutrophil/monocyte activation...
December 15, 2017: Haematologica
https://www.readbyqxmd.com/read/29237656/foot-strike-haemolysis-in-an-ultramarathon-runner
#7
Abid A Fazal, Mary S Whittemore, Katharine C DeGeorge
This case report describes mild anaemia and intravascular haemolysis in an otherwise healthy 41-year-old ultramarathon runner. In long-distance endurance athletes, trace gastrointestinal bleeding and plasma volume expansion are recognised sources of mild anaemia, often found incidentally. However, repetitive forceful foot striking can lead to blood cell lysis in the feet, resulting in a mild macrocytic anaemia and intravascular haemolysis, as was demonstrated in the patient described herein. Mild anaemia in runners, often called 'runner's pseudoanaemia', is typically clinically insignificant and does not require intervention...
December 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29231762/haemolytic-anaemia-and-hepatocitolysis-associated-with-hypermagnesaemia-by-repeated-exposures-to-copper-calcium-fungicides
#8
Constantin Bălăeţ, Bogdan Ioan Coculescu, Maria Bălăeţ, Gheorghe Manole, Gabi Valeriu Dincă
For the medical practice, our manuscript acts as a signal, despite only presenting three cases which feature the association between hepatocytolysis, haemolysis and hypermagnesaemia. This clinical-biologic triad was highlighted with the workers who through the nature of their profession were exposing themselves periodically to vapours which contained copper sulphate neutralised with calcium hydroxide, a fungicide used for fruit trees. We are exclusively assessing the haematological perturbation. In this aetiological context, the generating mechanism for haemolysis is very probable biochemical, where hypercupraemia interferes with cellular antioxidant defence mechanisms...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29217384/biocompatible-sulfenamide-and-sulfonamide-derivatives-of-metformin-can-exert-beneficial-effects-on-plasma-haemostasis
#9
Magdalena Markowicz-Piasecka, Kristiina M Huttunen, Elżbieta Mikiciuk-Olasik, Joanna Sikora
As the pharmacokinetic properties of metformin are unfavourable, several analogues and prodrugs have been synthesised to improve its bioavailability. The aim of this study was to assess the plasma stability of sulfenamide and sulfonamide derivatives of metformin and establish their effects on plasma haemostasis and integrity of red blood cells (RBCs). The overall haemostasis potential was evaluated spectrophotometrically by clot formation and lysis test (CL-test). PT (Prothrombin Time) and APTT (Activated Partial Tromboplastin Time) were used to evaluate the effects if the compounds on the extrinsic and intrinsic coagulation pathway...
December 4, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29188836/dissociation-of-haemolytic-and-oligomer-preventing-activities-of-gramicidin-s-derivatives-targeting-the-amyloid-%C3%AE-n-terminus
#10
Daoyuan Chen, Wenjing Qin, Gesi Wen, Bihua Shi, Ziyi Liu, Youqiao Wang, Qiang Zhou, Junmin Quan, Binhua Zhou, Xianzhang Bu
The intrinsic haemolysis of an amyloid-β (Aβ) N-terminal targeting gramicidin S derivative was successfully dissociated from its Aβ oligomer-preventing activities via Ala-scanning-based regulation of molecular amphiphilicity. The representative analogue DGR-7 shows low toxicity but significant efficiency in preventing Aβ oligomers and reducing amyloid plaques in APP/PS1 transgenic AD mice.
November 30, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29181841/epidural-therapy-for-the-treatment-of-severe-pre-eclampsia-in-non-labouring-women
#11
REVIEW
Amita Ray, Sujoy Ray
BACKGROUND: Pre-eclampsia is a pregnancy-specific multi-organ disorder, which is characterised by hypertension and multisystem organ involvement and which has significant maternal and fetal morbidity and mortality. Failure of the placental vascular remodelling and reduced uteroplacental flow form the etiopathological basis of pre-eclampsia. There are several established therapies for pre-eclampsia including antihypertensives and anticonvulsants. Most of these therapies aim at controlling the blood pressure or preventing complications of elevated blood pressure, or both...
November 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29181452/prevalences-of-inherited-red-blood-cell-disorders-in-pregnant-women-of-different-ethnicities-living-along-the-thailand-myanmar-border
#12
Germana Bancone, Mary Ellen Gilder, Nongnud Chowwiwat, Gornpan Gornsawun, Elsi Win, Win Win Cho, Eh Moo, Aung Myat Min, Prakaykaew Charunwatthana, Verena I Carrara, Nicholas J White, Francois Nosten, Rose McGready
Background: Inherited red blood cell disorders are prevalent in populations living in malaria endemic areas; G6PD deficiency is associated with oxidant-induced haemolysis and abnormal haemoglobin variants may cause chronic anaemia. In pregnant women, microcytic anaemia caused by haemoglobinopathies mimics iron deficiency, complicating diagnosis and treatment. Anaemia during pregnancy is associated with morbidity and mortality. The aim of this study was to characterise the prevalence of G6PD deficiency and haemoglobinopathies  among the pregnant population living along the Thailand-Myanmar border...
2017: Wellcome Open Research
https://www.readbyqxmd.com/read/29166903/evaluation-of-microrna-expression-in-plasma-and-skeletal-muscle-of-thoroughbred-racehorses-in-training
#13
B A McGivney, M E Griffin, K F Gough, C L McGivney, J A Browne, E W Hill, L M Katz
BACKGROUND: Circulating miRNAs (ci-miRNAs) are endogenous, non-coding RNAs emerging as potential diagnostic biomarkers. Equine miRNAs have been previously identified including subsets of tissue-specific miRNAs. In order to investigate ci-miRNAs as diagnostic tools, normal patterns of expression for different scenarios including responses to exercise need to be identified. Human studies have demonstrated that many ci-miRNAs are up-regulated following exercise with changes in expression patterns in skeletal muscle...
November 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29140694/tyrocidine-a-analogues-bearing-the-planar-d-phe-2-abz-turn-motif-how-conformation-impacts-bioactivity
#14
Alan J Cameron, Patrick J B Edwards, Elena Harjes, Vijayalekshmi Sarojini
The D-Phe-Pro β-turn of the cyclic β-hairpin antimicrobial decapeptide Tyrocidine A, (Tyrc A) was substituted with the D-Phe-2-aminobenzoic acid (2-Abz) motif in a synthetic analogue (1). NMR structure of 1 demonstrated that compound 1 retained the β-hairpin structure of Tyrc A with additional planarity, resulting in approx. 30-fold reduced haemolysis than Tyrc A. Although antibacterial activity was partially compromised, a single Gln to Lys substitution (2) restored activity equivalent to Tyrc A against S...
November 15, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29123569/diagnostic-dilemma-severe-thrombotic-microangiopathy-in-pregnancy
#15
Sarah Birkhoelzer, Alexandra Belcher, Helen Peet
A diagnostic dilemma occurred when thrombotic microangiopathy developed during pregnancy. The diagnostic criteria of thrombotic microangiopathy include thrombocytopenia (platelets <100) and microangiopathic haemolytic anaemia (including thrombotic thrombocytopenic purpura and haemolytic-uraemic syndrome). An urgent interdisciplinary approach is required to treat thrombotic microangiopathy in pregnancy to differentiate between thrombotic microangiopathy and HELLP syndrome (haemolysis, elevated liver enzymes, low platelets)...
November 2017: Journal of the Intensive Care Society
https://www.readbyqxmd.com/read/29118838/a-complex-obstetric-case
#16
Michael Hoy, Kate Flavin, Venkat Prasad
A 33-year-old primigravida presented with severe sepsis, severe pre-eclampsia, peripartum cardiomyopathy and the haemolysis, elevated liver enzymes and low platelets syndrome manifesting over the course of 24 h causing a diagnostic conundrum and a difficult sequence of physiological problems to overcome. We describe a previously unreported sequence of events involving a pre-eclamptic, septic parturient to improve anaesthetic and intensive care physician awareness of confounding factors that complicate assessment and management of these patients...
August 2017: Journal of the Intensive Care Society
https://www.readbyqxmd.com/read/29114967/effect-of-intravenous-immunoglobulin-administration-on-erythrocyte-and-leukocyte-parameters
#17
A Cicha, M B Fischer, A Wesinger, S Haas, W M Bauer, H M Wolf, K M T Sauerwein, B Reininger, P Petzelbauer, H Pehamberger, A Handisurya
BACKGROUND: Intravenous immunoglobulins (IVIG) are an attractive therapeutic tool for therapy of toxic epidermal necrolysis and severe forms of certain autoimmune diseases, including dermatomyositis, autoimmune blistering diseases, systemic vasculitis, and lupus erythematodes. OBJECTIVE: Prompted by a case of IVIG-associated haemolytic anaemia, the effects of IVIG administrations on haematological parameters in patients with dermatological conditions were investigated...
November 8, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29112170/psn-pc-a-novel-antimicrobial-and-anti-biofilm-peptide-from-the-skin-secretion-of-phyllomedusa-camba-with-cytotoxicity-on-human-lung-cancer-cell
#18
Xianhui Wu, Jinhuo Pan, Yue Wu, Xinping Xi, Chengbang Ma, Lei Wang, Mei Zhou, Tianbao Chen
Peptides derived from amphibian skin secretion are promising drug prototypes for combating widespread infection. In this study, a novel peptide belonging to the phylloseptin family of antimicrobial peptides was isolated from the skin secretion of the Phyllomedusa camba, namely phylloseptin-PC (PSN-PC). The biosynthetic precursor was obtained by molecular cloning and the mature peptide sequence was confirmed through tandem mass spectrometry (MS/MS) fragmentation sequencing in the skin secretion. The synthetic replicate exhibited a broad spectrum antimicrobial activity against Staphylococcus aureus, methicillin-resistant Staphylococcus aureus,Escherichia coli, Pseudomonas aeruginosa, Candida albicans at concentrations of 2, 2, 8, 32 and 2 µM, respectively...
November 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29107137/a-novel-iron-supplements-preparation-from-grifola-frondosa-polysaccharide-and-assessment-of-antioxidant-lymphocyte-proliferation-and-complement-fixing-activities
#19
Lei Xu, Yongbin Meng, Ying Liu, Qinghuan Meng, Zidong Zhang, Jian Li, Qi Lu
Grifola frondosa polysaccharide-iron (III) complex (GFP-iron) was synthesized and characterized. Based on single factor and orthogonal optimization experiments of GFP-iron (III) complex synthesis, the optimum conditions were the reaction temperature 80°C, pH 8, reaction time 90min and ratio of catalyst to GFP 1:1.0 gg(-1). The iron content of GFP-iron (III) complex reached 24.15% under the optimums and characterized by fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-Ray Diffraction (XRD), thermogravimetry (TG) and iron release in vitro assay...
October 26, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29101578/biosurfactant-production-by-yeasts-isolated-from-hydrocarbon-polluted-environments
#20
Kamalpreet Kaur, Seema Sangwan, Harpreet Kaur
Thirty-two yeast isolates were retrieved from four soil samples collected from hydrocarbon-polluted locations of Hisar, Haryana, using enrichment culture technique with 1% (v/v) diesel as carbon source. Total nine isolates showing blood agar haemolysis were screened further for biosurfactant production. Yeast isolate, YK32, gave highest 8.4-cm oil displacement which was found to be significantly higher as compared to positive control, 0.2% (w/v) SDS (6.6 cm), followed by 6.2 and 6.0 cm by isolates YK20 and YK21, respectively...
November 3, 2017: Environmental Monitoring and Assessment
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