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Cell-free hemoglobin

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https://www.readbyqxmd.com/read/28183818/normalization-of-hemoglobin-based-oxygen-carrier-201-induced-vasoconstriction-roles-of-nitric-oxide-scavenging-and-endothelin
#1
Yannick J Taverne, Daphne P M de Wijs-Meijler, Maaike Te Lintel Hekkert, Paula F Moon-Massat, Greg P Dubé, Dirk Jan Duncker, Daphne Merkus
BACKGROUND: Hemoglobin-based oxygen carrier (HBOC)-201 is a cell-free modified hemoglobin solution potentially facilitating oxygen uptake and delivery in cardiovascular disorders and hemorrhagic shock. Clinical use has been hampered by vasoconstriction in the systemic and pulmonary beds. Therefore we aimed to 1) determine the possibility of counteracting HBOC-201-induced pressor effects with adenosine (ADO), 2) assess the potential roles of nitric oxide (NO) scavenging, reactive oxygen species (ROS) and endothelin (ET) in mediating the observed vasoconstriction and 3) compare these effects in resting and exercising swine...
February 9, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28154994/neutrophil-to-lymphocyte-ratio-predicts-outcome-in-limited-disease-small-cell-lung-cancer
#2
Lukas Käsmann, Louisa Bolm, Steven E Schild, Stefan Janssen, Dirk Rades
INTRODUCTION: Patients with limited disease small-cell lung cancer (SCLC) receive radiochemotherapy followed by prophylactic cranial irradiation. The prognosis of these patients remains poor with a median survival of 16-24 months. Systemic inflammation was suggested as an important prognostic factor for outcomes. This study investigated the impact of systemic inflammation measured with neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) at first diagnosis in patients with limited disease SCLC for outcomes...
February 2, 2017: Lung
https://www.readbyqxmd.com/read/28153420/the-independent-oncological-role-for-cytoreductive-nephrectomy-in-metastatic-renal-cell-carcinoma-prognostic-features-in-the-era-of-targeted-therapies
#3
Tom Claeys, Nicolaas Lumen, Candy Kumps, Marleen Praet, Gert De Meerleer, Sylvie Rottey, Piet Ost, Pieter Devisschere, Geert Villeirs, Valerie Fonteyne, Karel Decaestecker
OBJECTIVES: To describe the effects of cytoreductive nephrectomy (CN) on the natural course of metastatic renal cell carcinoma (mRCC). CN appears to stabilize metastatic lesions in mRCC in a subgroup of patients and we hypothesize that systemic treatment might be deferred in these patients with stable disease after CN. SUBJECTS AND METHODS: Overall, 45 patients with mRCC who underwent CN and subsequent oncologic follow-up were included in this retrospective, single-center analysis...
January 30, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28152051/hemoglobin-induced-cell-trauma-indirectly-influences-endothelial-tlr9-activity-resulting-in-pulmonary-vascular-smooth-muscle-cell-activation
#4
Zoe Loomis, Paul Eigenberger, Katherine Redinius, Christina Lisk, Vijaya Karoor, Eva Nozik-Grayck, Scott K Ferguson, Kathryn Hassell, Rachelle Nuss, Kurt Stenmark, Paul Buehler, David C Irwin
It is now well established that both inherited and acquired forms of hemolytic disease can promote pulmonary vascular disease consequent of free hemoglobin (Hb) induced NO scavenging, elevations in reactive oxygen species and lipid peroxidation. It has recently been reported that oxidative stress can activate NFkB through a toll-like receptor 9 (TLR9) mediated pathway; further, TLR9 can be activated by either nuclear or mitochondrial DNA liberated by stress induced cellular trauma. We hypothesis that Hb induced lipid peroxidation and subsequent endothelial cell trauma is linked to TLR9 activation, resulting in IL-6 mediated pulmonary smooth muscle cell proliferation...
2017: PloS One
https://www.readbyqxmd.com/read/28149561/prognostic-significance-of-red-cell-distribution-width-in-elderly-patients-undergoing-resection-for-non-small-cell-lung-cancer
#5
Junji Ichinose, Tomohiro Murakawa, Mitsuaki Kawashima, Kazuhiro Nagayama, Jun-Ichi Nitadori, Masaki Anraku, Jun Nakajima
BACKGROUND: The impact of red cell distribution width (RDW) on outcomes in elderly patients after surgery for non-small cell lung cancer (NSCLC) is not fully understood. METHODS: We retrospectively analyzed 992 NSCLC patients who underwent curative resection between 1998 and 2012. The following variables were included in the analyses to evaluate the role of RDW: age, gender, smoking index, leukocyte count, neutrophil to lymphocyte ratio (NLR), hemoglobin, platelet count, albumin, C-reactive protein, carcinoembryonic antigen, respiratory function, histology, T factor, N factor, surgical approach, surgical procedures, complications and prognosis...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28127835/residual-beta-cell-function-in-diabetes-children-followed-and-diagnosed-in-the-teddy-study-compared-to-community-controls
#6
Andrea K Steck, Helena Elding Larsson, Xiang Liu, Riitta Veijola, Jorma Toppari, William A Hagopian, Michael J Haller, Simi Ahmed, Beena Akolkar, Åke Lernmark, Marian J Rewers, Jeffrey P Krischer
OBJECTIVE: To explore whether children diagnosed with type 1 diabetes during islet autoantibody surveillance through The Environmental Determinants of Diabetes in the Young (TEDDY) study retain greater islet function than children diagnosed through the community. METHODS: TEDDY children identified at birth with high-risk human leukocyte antigen and followed every 3 months until diabetes diagnosis were compared to age-matched children diagnosed with diabetes in the community...
January 27, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28120261/atorvastatin-decreased-circulating-rantes-levels-in-impaired-glucose-tolerance-patients-with-hypercholesterolemia-an-interventional-study
#7
Xiaomeng Feng, Xia Gao, Yumei Jia, Heng Zhang, Yuan Xu
INTRODUCTION: Impaired glucose tolerance (IGT) is the major cause of the development of both type 2 diabetes and atherosclerosis. Regulated upon activation, normal T cells expressed and secreted (RANTES), a proinflammatory chemokine, is associated with atherosclerosis. We investigated the effect of atorvastatin on circulating RANTES in IGT patients with hypercholesterolemia. METHODS: This study evaluated cross-sectional and interventional studies of 32 IGT patients with hypercholesterolemia (group A) and 32 controls (group B)...
January 24, 2017: Diabetes Therapy: Research, Treatment and Education of Diabetes and related Disorders
https://www.readbyqxmd.com/read/28109974/incidences-and-outcomes-of-therapy-related-chronic-myeloid-leukemia-in-the-era-of-tyrosine-kinase-inhibitors-surveillance-of-the-cml-cooperative-study-group
#8
Noriyoshi Iriyama, Michihide Tokuhira, Tomoiku Takaku, Eriko Sato, Maho Ishikawa, Tomonori Nakazato, Kei-Ji Sugimoto, Hiroyuki Fujita, Isao Fujioka, Yoshihiro Hatta, Masahiro Kizaki, Norio Komatsu, Norio Asou, Tatsuya Kawaguchi
This study was performed to investigate the features and outcome of patients with therapy-related chronic myeloid leukemia (TR-CML) who were treated with tyrosine kinase inhibitors (TKIs). The analysis included 308 patients with CML in the chronic phase who were extracted from the CML Cooperative Study Group database. Of these patients, 11 (3.6%) were identified as having TR-CML. No differences in age, sex, white blood cell count, hemoglobin level, platelet count, or European Treatment and Outcome Study risk were observed between patients with TR-CML vs...
January 5, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28090285/pulmonary-vascular-and-ventricular-dysfunction-in-the-susceptible-patient-2015-grover-conference-series
#9
REVIEW
Bradley A Maron, Roberto F Machado, Larissa Shimoda
Pulmonary blood vessel structure and tone are maintained by a complex interplay between endogenous vasoactive factors and oxygen-sensing intermediaries. Under physiological conditions, these signaling networks function as an adaptive interface between the pulmonary circulation and environmental or acquired perturbations to preserve oxygenation and maintain systemic delivery of oxygen-rich hemoglobin. Chronic exposure to hypoxia, however, triggers a range of pathogenetic mechanisms that include hypoxia-inducible factor 1α (HIF-1α)-dependent upregulation of the vasoconstrictor peptide endothelin 1 in pulmonary endothelial cells...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28089863/prevention-of-thrombosis-in-hypercoagulable-patients-undergoing-microsurgery-a-novel-anticoagulation-protocol
#10
Jonas A Nelson, Cyndi U Chung, Andrew R Bauder, Liza C Wu
BACKGROUND: Hypercoagulable conditions are often considered relative contraindications to free flap reconstruction. This paper presents and critically examines a novel anticoagulation regimen developed to address this disease state. METHODS: Hypercoagulable patients who underwent free tissue transfer between 2007 and 2015 were identified. From 2011, all such patients were subjected to a novel anticoagulation protocol involving an intravenous bolus of 2000 U of unfractionated heparin prior to microvascular pedicle anastomosis, followed by a heparin infusion at 500 U/h, which was postoperatively increased to therapeutic levels...
December 18, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28088643/molecular-mechanisms-of-bio-catalysis-of-heme-extraction-from-hemoglobin
#11
Serzhan Sakipov, Olga Rafikova, Maria G Kurnikova, Ruslan Rafikov
Red blood cell hemolysis in sickle cell disease (SCD) releases free hemoglobin. Extracellular hemoglobin and its degradation products, free heme and iron, are highly toxic due to oxidative stress induction and decrease in nitric oxide availability. We propose an approach that helps to eliminate extracellular hemoglobin toxicity in SCD by employing a bacterial protein system that evolved to extract heme from extracellular hemoglobin. NEAr heme Transporter (NEAT) domains from iron-regulated surface determinant proteins from Staphylococcus aureus specifically bind free heme as well as facilitate its extraction from hemoglobin...
January 7, 2017: Redox Biology
https://www.readbyqxmd.com/read/28070238/hematological-disorders-and-pulmonary-hypertension
#12
REVIEW
Rajamma Mathew, Jing Huang, Joseph M Wu, John T Fallon, Michael H Gewitz
Pulmonary hypertension (PH), a serious disorder with a high morbidity and mortality rate, is known to occur in a number of unrelated systemic diseases. Several hematological disorders such as sickle cell disease, thalassemia and myeloproliferative diseases develop PH which worsens the prognosis. Associated oxidant injury and vascular inflammation cause endothelial damage and dysfunction. Pulmonary vascular endothelial damage/dysfunction is an early event in PH resulting in the loss of vascular reactivity, activation of proliferative and antiapoptotic pathways leading to vascular remodeling, elevated pulmonary artery pressure, right ventricular hypertrophy and premature death...
December 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/28065838/current-results-and-future-research-priorities-in-late-effects-after-hematopoietic-stem-cell-transplantation-for-children-with-sickle-cell-disease-and-thalassemia-a-consensus-statement-from-the-second-pediatric-blood-and-marrow-transplant-consortium-international
#13
Shalini Shenoy, Emanuele Angelucci, Staci D Arnold, K Scott Baker, Monica Bhatia, Dorine Bresters, Andrew C Dietz, Josu De La Fuente, Christine Duncan, Javid Gaziev, Allison A King, Michael A Pulsipher, Angela Smith, Mark C Walters
Sustained donor engraftment after allogeneic hematopoietic cell transplantation (HCT) converts to healthy donor hemoglobin synthesis and halts disease symptoms in patients with sickle cell disease and thalassemia major. A disease-free survival probability that exceeds 90% has been reported when HCT using an HLA-matched sibling donor is performed in young patients with low-risk disease or treatment-related risk factors. Alternate donor HCT and HCT in adults is performed infrequently because of a higher risk profile...
January 5, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28054978/hemoglobin-based-blood-substitutes-and-the-treatment-of-sickle-cell-disease-more-harm-than-help
#14
REVIEW
Abdu I Alayash
Intense efforts have been made by both industry and academia over the last three decades to produce viable hemoglobin (Hb)-based oxygen carriers (HBOCs), also known as "blood substitutes". Human trials conducted so far by several manufactures in a variety of clinical indications, including trauma, and elective surgeries have failed and no product has gained the Food and Drug Administration approval for human use. Safety concerns due to frequent incidences of hemodynamic, cardiac events, and even death led to the termination of some of these trials...
January 4, 2017: Biomolecules
https://www.readbyqxmd.com/read/28044953/a-rare-case-of-upper-digestive-hemorrhage-due-to-bleeding-duodenal-tumor
#15
Claudiu Turculeţ, Dragoş Ene, Teodor Florin Georgescu, E Ciucă, A Vlădăşcău, Florin Iordache, Mircea Beuran
We present the case of a 48-year-old patient with no medical history, who presents himself to the emergency room with melena, asthenia and dizziness. The blood tests revealed a severe anemia (Hb = 4,8 g/dL). He is admitted in the Gastroenterology ward, where a first superior digestive endoscopy is performed which shows a duodenal bleeding tumor (second duodenum) of 7 cm in length. After the administration of red blood cell mass, plasma and haemostatic agents the level of the hemoglobin increases. The abdominal CT scan reveals a 3/5 tumor localized in the second and third duodenum...
November 2016: Chirurgia
https://www.readbyqxmd.com/read/28044355/a-cellular-model-of-shear-induced-hemolysis
#16
Salman Sohrabi, Yaling Liu
A novel model is presented to study red blood cell (RBC) hemolysis at cellular level. Under high shear rates, pores form on RBC membranes through which hemoglobin (Hb) leaks out and increases free Hb content of plasma leading to hemolysis. By coupling lattice Boltzmann and spring connected network models through immersed boundary method, we estimate hemolysis of a single RBC under various shear rates. First, we use adaptive meshing to find local strain distribution and critical sites on RBC membranes, and then we apply underlying molecular dynamics simulations to evaluate damage...
January 3, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28040423/prognostic-significance-of-increases-in-hemoglobin-in-renal-cell-carcinoma-patients-during-treatment-with-vegf-directed-therapy
#17
Abhishek Tripathi, Susanna Jacobus, Hope Feldman, Toni K Choueiri, Lauren C Harshman
BACKGROUND: Increases in hemoglobin have been reported in renal cell carcinoma (RCC) patients treated with vascular endothelial growth factor (VEGF) pathway-targeted therapies and have been associated with increased progression-free survival (PFS). We retrospectively evaluated its significance as a predictive biomarker of clinical response in RCC. PATIENTS AND METHODS: Patients with advanced RCC treated with VEGF receptor tyrosine kinase inhibitors (TKIs) or bevacizumab as a first-line therapy were identified...
December 13, 2016: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28039017/development-of-pro-inflammatory-phenotype-in-monocytes-after-engulfing-hb-activated-platelets-in-hemolytic-disorders
#18
Rashi Singhal, Sheetal Chawla, Deepak K Rathore, Angika Bhasym, Gowtham K Annarapu, Vandana Sharma, Tulika Seth, Prasenjit Guchhait
Monocytes and macrophage combat infections and maintain homeostatic balance by engulfing microbes and apoptotic cells, and releasing inflammatory cytokines. Studies have described that these cells develop anti-inflammatory properties upon recycling the free-hemoglobin (Hb) in hemolytic conditions. While investigating the phenotype of monocytes in two hemolytic disorders-paroxysmal nocturnal hemoglobinuria (PNH) and sickle cell disease (SCD), we observed a high number of pro-inflammatory (CD14(+)CD16(hi)) monocytes in these patients...
December 28, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28034989/serum-b-cell-maturation-antigen-a-novel-biomarker-to-predict-outcomes-for-multiple-myeloma-patients
#19
Michael Ghermezi, Mingjie Li, Suzie Vardanyan, Nika Manik Harutyunyan, Jillian Gottlieb, Ariana Berenson, Tanya M Spektor, Claudia Andreu-Vieyra, Sophia Petraki, Eric Sanchez, Kyle Udd, Cathy S Wang, Regina A Swift, Haiming Chen, James R Berenson
B-cell maturation antigen is expressed on plasma cells. In this study, we have identified serum B-call maturation antigen as a novel biomarker that can monitor and predict outcomes for multiple myeloma patients. Compared to healthy donors, patients with multiple myeloma showed elevated serum B-cell maturation antigen levels (P < 0.0001). Serum B-cell maturation antigen levels correlated with the proportion of plasma cells in bone marrow biopsies (Spearman rho = 0.710; P < 0.001), clinical status (P values: 0...
December 29, 2016: Haematologica
https://www.readbyqxmd.com/read/28009428/high-dose-chemotherapy-and-peripheral-hematopoietic-stem-cell-transplantation-in-relapsed-refractory-hodgkin-s-lymphoma
#20
Mouhammed Kelta, Jamal Zekri, Ehab Abdelghany, Jalil Ur Rehman, Zahid Amin Khan, Rawan Al-Saadi, Reyad Dada
PURPOSE: High-dose chemotherapy (HDCT) and autologous stem cell transplantation (ASCT) is used to treat patients with relapsed Hodgkin's lymphoma. In this retrospective study we report our experience with patients who underwent HDCT and ASCT. METHODS: All patients ≥15 years old with relapsed/refractory Hodgkin's lymphoma who underwent HDCT and ASCT between June 2001 and December 2013 were included. RESULTS: Fifty-four patients were identified...
December 19, 2016: Tumori
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