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https://www.readbyqxmd.com/read/28214553/mimicking-oxygen-delivery-and-waste-removal-functions-of-blood
#1
Huaifa Zhang, Jake E Barralet
In addition to immunological and wound healing cell and platelet delivery, ion stasis and nutrient supply, blood delivers oxygen to cells and tissues and removes metabolic wastes. For decades researchers have been trying to develop approaches that mimic these two immediately vital functions of blood. Oxygen is crucial for the long-term survival of tissues and cells in vertebrates. Hypoxia (oxygen deficiency) and even at times anoxia (absence of oxygen) can occur during organ preservation, organ and cell transplantation, wound healing, in tumors and engineering of tissues...
February 15, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28213861/peri-operative-allogeneic-blood-transfusion-and-outcomes-after-radical-cystectomy-a-population-based-study
#2
D Robert Siemens, Melanie T Jaeger, Xuejiao Wei, Francisco Vera-Badillo, Christopher M Booth
INTRODUCTION: To describe factors associated with peri-operative blood transfusion (PBT) at radical cystectomy (RC) for patients with bladder cancer and evaluate its association on both early and late outcomes. METHODS: Electronic records of treatment and surgical pathology reports were linked to the population-based Ontario Cancer Registry to identify all patients who underwent RC between 2000 and 2008. Modified Poisson regression model was used to determine the factors associated with PBT...
February 17, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28213850/gamma-hydroxybutyrate-ghb-content-in-hair-samples-correlates-negatively-with-age-in-succinic-semialdehyde-dehydrogenase-deficiency
#3
S S Johansen, X Wang, D Sejer Pedersen, P L Pearl, J-B Roullet, G R Ainslie, K R Vogel, K M Gibson
Gamma-hydroxybutyrate (GHB) is a drug of abuse, an approved therapeutic for narcolepsy, an agent employed for facilitation of sexual assault, as well as a biomarker of succinic semialdehyde dehydrogenase deficiency (SSADHD). Our laboratory seeks to identify surrogate biomarkers in SSADHD that can shed light on the developmental course of this neurometabolic disease. Since GHB may be quantified in hair as a potential surrogate to identify victims of drug-related assault, we have opted to examine its level in SSADHD...
February 18, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28213648/-state-of-the-art-in-fluid-and-volume-therapy-a%C3%A2-user-friendly-staged-concept
#4
M Rehm, N Hulde, T Kammerer, A S Meidert, K Hofmann-Kiefer
Adequate fluid therapy is highly important for the perioperative outcome of our patients. Both, hypovolemia and hypervolemia can lead to an increase in perioperative complications and can impair the outcome. Therefore, perioperative infusion therapy should be target-oriented. The main target is to maintain the patient's preoperative normovolemia by using a sophisticated, rational infusion strategy.Perioperative fluid losses should be discriminated from volume losses (surgical blood loss or interstitial volume losses containing protein)...
February 17, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28213526/structural-and-mechanistic-insights-into-hemoglobin-catalyzed-hydrogen-sulfide-oxidation-and-the-fate-of-polysulfide-products
#5
Victor Vitvitsky, Pramod K Yadav, Sojin An, Javier Seravalli, Uhn-Soo Cho, Ruma Banerjee
Hydrogen sulfide is a cardioprotective signaling molecule but is toxic at elevated concentrations. Red blood cells can synthesize H2S but lacking organelles, cannot dispose off H2S via the mitochondrial sulfide oxidation pathway. We have recently shown that at high sulfide concentrations, ferric hemoglobin oxidizes H2S to a mixture of thiosulfate and iron-bound polysulfides in which the latter species predominates. Here, we report the crystal structure of human hemoglobin containing low-spin ferric sulfide, the first intermediate in heme-catalyzed sulfide oxidation...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28213436/host-cell-tropism-and-adaptation-of-blood-stage-malaria-parasites-challenges-for-malaria-elimination
#6
Caeul Lim, Selasi Dankwa, Aditya S Paul, Manoj T Duraisingh
Plasmodium falciparum and Plasmodium vivax account for most of the mortality and morbidity associated with malaria in humans. Research and control efforts have focused on infections caused by P. falciparum and P. vivax, but have neglected other malaria parasite species that infect humans. Additionally, many related malaria parasite species infect nonhuman primates (NHPs), and have the potential for transmission to humans. For malaria elimination, the varied and specific challenges of all of these Plasmodium species will need to be considered...
February 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28213059/multidisciplinary-team-learning-in-the-management-of-the-morbidly-adherent-placenta-outcome-improvements-over-time
#7
Alireza A Shamshirsaz, Karin A Fox, Hadi Erfani, Steven L Clark, Bahram Salmanian, B Wycke Baker, Michael Coburn, Amir A Shamshirsaz, Zhoobin H Bateni, Jimmy Espinoza, Ahmed A Nassr, Edwina J Popek, Shiu-Ki Hui, Jun Teruya, Celestine Shauching Tung, Jeffery A Jones, Martha Rac, Gary A Dildy, Michael A Belfort
BACKGROUND: Morbidly adherent placenta (MAP) is a serious obstetric complication causing mortality and morbidity. OBJECTIVE: To evaluate whether outcomes of patients with morbidly adherent placenta improve with increasing experience within a well-established multidisciplinary team at a single referral center. STUDY DESIGN: All singleton pregnancies with pathology-confirmed MAP (including placenta accreta, increta or percreta) managed by a multidisciplinary team between January 2011 and August 2016 were included in this retrospective study...
February 14, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28212709/erythrocyte-deformability-and-aggregation-responses-to-intermittent-and-continuous-artificial-gravity-exposure
#8
Grau Marijke, Abeln Vera, Vogt Tobias, Bloch Wilhelm, Schneider Stefan
Artificial gravity protocols are used to improve g-tolerance of aviators and discussed as countermeasure during prolonged space flight. Little is known about the impact of artificial gravity on the red blood cells (RBC). The purpose of the study was to test how artificial gravity affects RBC deformability and aggregation, which are important determinants of microcirculation. Nine male subjects were exposed to two hypergravity protocols using a short arm human centrifuge: a continuous (CONT) protocol with constant +2Gz for 30min and an intermittent (INTER) protocol with repeated intervals of +2Gz and rest...
February 2017: Life Sciences in Space Research
https://www.readbyqxmd.com/read/28212631/anti-malarial-effect-of-novel-chloroquine-derivatives-as-agents-for-the-treatment-of-malaria
#9
Seon-Ju Yeo, Dong-Xu Liu, Hak Sung Kim, Hyun Park
BACKGROUND: The widespread emergence of anti-malarial drug resistance has necessitated the discovery of novel anti-malarial drug candidates. In this study, chloroquine derivatives were evaluated for the improved anti-malarial activity. RESULTS: Novel two derivatives (SKM13 and SKM14) were synthesized based on the chloroquine (CQ) template containing modified side chains such as α,β-unsaturated amides and phenylmethyl group. The selective index indicated that SKM13 was 1...
February 17, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28212390/lack-of-effects-of-fish-oil-supplementation-for-12-weeks-on-resting-metabolic-rate-and-substrate-oxidation-in-healthy-young-men-a-randomized-controlled-trial
#10
Sebastian Jannas-Vela, Kaitlin Roke, Stephanie Boville, David M Mutch, Lawrence L Spriet
: Fish oil (FO) has been shown to have beneficial effects in the body via incorporation into the membranes of many tissues. It has been proposed that omega-3 fatty acids in FO may increase whole body resting metabolic rate (RMR) and fatty acid (FA) oxidation in human subjects, but the results to date are equivocal. The purpose of this study was to investigate the effects of a 12 week FO supplementation period on RMR and substrate oxidation, in comparison to an olive oil (OO) control group, in young healthy males (n = 26; 22...
2017: PloS One
https://www.readbyqxmd.com/read/28211801/effect-of-shear-induced-platelet-activation-on-red-blood-cell-aggregation
#11
Hoyoon Lee, Kisung Lee, Byoung-Kwon Lee, Alexander V Priezzhev, Sehyun Shin
Mechanical shear stress is one of the important factors for platelet activation. Although shear stress has been frequently utilized in many applications of diagnostic bio-equipment, there has been little consideration as to whether shear stress induces platelet activation and consequently alters hemorheological characteristics. Therefore, we investigated the effect of shear-induced platelet activation on red blood cell (RBC) aggregation. The hypothesis of the present research is as follows: Platelets activated by high shear stress secrete substances, which can affect hemorheological characteristics to promote RBC aggregation...
February 17, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28211787/clinical-factors-influencing-the-decision-to-order-red-blood-cell-transfusions-for-a-sample-of-us-dialysis-patients%C3%A2
#12
J Mark Stephens, John P Caloyeras, John Holmen, Victoria A Kumar, Spiros Tzivelekis, Allan Pollock
AIM: To characterize the clinical context for the decision to order red blood cell (RBC) transfusions in dialysis patients. MATERIALS AND METHODS: Retrospective review of medical records from three integrated health systems serving chronic dialysis patients. Subjects were randomly selected from all patients who received at least one transfusion between January 2009 and December 2013. Data abstracted included transfusion setting, prescribing clinician type, patient demographics and hemoglobin (Hb) concentration prior to transfusion, and cataloguing and prioritizing of clinical factors for their contribution to the decision to transfuse...
February 17, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28210651/analysis-of-platelet-rich-plasma-extraction-variations-in-platelet-and-blood-components-between-4-common-commercial-kits
#13
Jane Fitzpatrick, Max K Bulsara, Paul Robert McCrory, Martin D Richardson, Ming Hao Zheng
BACKGROUND: Platelet-rich plasma (PRP) has been extensively used as a treatment in tissue healing in tendinopathy, muscle injury, and osteoarthritis. However, there is variation in methods of extraction, and this produces different types of PRP. PURPOSE: To determine the composition of PRP obtained from 4 commercial separation kits, which would allow assessment of current classification systems used in cross-study comparisons. STUDY DESIGN: Controlled laboratory study...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28210641/atypical-plasmacytic-proliferation-in-a-case-of-c3-glomerulopathy-pathophysiology-demystified
#14
Osama Elfituri, Nathan Aardsma, Suman Setty, Frederick Behm, Kimberly Czech
An 11-year-old Hispanic female underwent evaluation of asymptomatic proteinuria and hematuria. The patient denied fever, edema, and gross hematuria. Urinalysis showed mild proteinuria, and a urine microscopic examination revealed red blood cells. Screening tests for glomerulonephritis revealed a low C3 and negative ANA, ASO, DNAse-B, and ANCA. Histological examination of a renal biopsy specimen showed glomeruli with endocapillary proliferation, a predominant C3 deposition in the capillary loops by immunofluorescence, and electron dense deposits in the mesangium, paramesangium, and capillary walls by electron microscopy consistent with a diagnosis of C3 glomerulopathy...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28210632/increased-interleukin-17f-is-associated-with-elevated-autoantibody-levels-and-more-clinically-relevant-than-interleukin-17a-in-primary-sj%C3%A3-gren-s-syndrome
#15
Yuzhou Gan, Xiaozhen Zhao, Jing He, Xu Liu, Yun Li, Xiaolin Sun, Zhanguo Li
Th17 related immune response is pathogenic in primary Sjögren's syndrome (pSS). However, the role of IL-17F, one potent inflammatory member of IL-17 family cytokines in pSS, has not been specifically defined. We recruited one hundred and nine pSS patients and forty-two healthy controls and their serum levels of IL-17A and IL-17F were determined by multiplex cytokine assays. White blood cell, red blood cell, neutrophil, lymphocyte, IgM, IgG, C3, C4, RF, ANA, anti-SSA antibody, and anti-SSB antibody were measured by standard laboratory techniques...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28210260/from-the-cradle-to-the-grave-the-role-of-macrophages-in-erythropoiesis-and-erythrophagocytosis
#16
REVIEW
Thomas R L Klei, Sanne M Meinderts, Timo K van den Berg, Robin van Bruggen
Erythropoiesis is a highly regulated process where sequential events ensure the proper differentiation of hematopoietic stem cells into, ultimately, red blood cells (RBCs). Macrophages in the bone marrow play an important role in hematopoiesis by providing signals that induce differentiation and proliferation of the earliest committed erythroid progenitors. Subsequent differentiation toward the erythroblast stage is accompanied by the formation of so-called erythroblastic islands where a central macrophage provides further cues to induce erythroblast differentiation, expansion, and hemoglobinization...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28208930/precautionary-measures-for-successful-open-heart-surgery-in-g6pd-deficient-patient-a-case-report
#17
Rupesh Kumar
Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency is among the most common enzymatic disorders of red blood cells. Cardiac surgeries on this group of individuals are associated with an additional risk in terms of impaired oxygenation, prolonged ventilation and increased risk of haemolysis. These patients have a very low threshold for haemolysis due to oxidative stress. Many commonly used drugs also predispose the individual for haemolysis when they are subjected to surgery. Here we present a known case of G6PD deficient patient with symptoms of breathlessness for the last nine years who was taken for surgery with pre-planned precautionary measures to avoid unnecessary haemolysis...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208817/validity-of-the-food-frequency-questionnaire-assessing-the-folate-intake-in-women-of-reproductive-age-living-in-a-country-without-food-fortification-application-of-the-method-of-triads
#18
Milica Zekovic, Marija Djekic-Ivankovic, Marina Nikolic, Mirjana Gurinovic, Dusanka Krajnovic, Marija Glibetic
The study aimed to examine the external validity of the Folate Food Frequency Questionnaire (F-FFQ) designed for assessing the folate intake in Serbian women of reproductive age. The F-FFQ was tested against repeated 24 h dietary recalls and correspondent nutritional biomarkers (red blood cells (RBC) and serum folate concentrations) using the method of triads. In a cross sectional study, 503 women aged 18-49 years completed dietary questionnaires and representative validation subsample (n = 50) provided fasting blood samples for biomarker analyses...
February 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28208017/tailoring-cellular-uptake-and-fluorescence-of-poly-2-oxazoline-based-nanogels
#19
Ulrich S Schubert, Matthias Hartlieb, Tanja Bus, Joachim Kübel, David Pretzel, Stephanie Hoeppener, Meike N Leiske, Kristian Kempe, Benjamin Dietzek
Controlling the size and charge of nanometer sized objects is of upmost importance for their interactions with cells. We herein present the synthesis of poly(2-oxazoline) based nanogels comprising a hydrophilic shell and an amine containing core compartment. Amine groups were cross-linked using glutaraldehyde resulting in imine based nanogels. As a drug model, amino fluorescein was covalently immobilized within the core, quenching excessive aldehyde functions. By varying the amount of cross-linker, the zeta potential and, hence, the cellular uptake could be adjusted...
February 16, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28207540/different-dosages-of-mifepristone-versus-enantone-to-treat-uterine-fibroids-a-multicenter-randomized-controlled-trial
#20
Chongdong Liu, Qi Lu, Hong Qu, Li Geng, Meilu Bian, Minli Huang, Huilan Wang, Youzhong Zhang, Zeqing Wen, Shurong Zheng, Zhenyu Zhang
BACKGROUND: To evaluate the efficacy and safety of 10 mg and 25 mg mifepristone per day compared with 3.75 mg enantone in treating uterine fibroids. METHODS: This is a Multicenter randomized controlled trial. A total of 501 subjects with symptomatic uterine fibroids were enrolled and randomized into the group of 10mg, 25mg mifepristone and 3.75 enantone (with 307, 102 and 92 subjects respectively), with 458 subjects completed the treatment. Three months of daily therapy with oral mifepristone (at a dose of either 10 mg or 25 mg) or once-monthly subcutaneous injections of enantone (at a dose of 3...
February 2017: Medicine (Baltimore)
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