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https://www.readbyqxmd.com/read/27919911/in-vitro-activation-of-coagulation-by-human-neutrophil-dna-and-histone-proteins-but-not-neutrophil-extracellular-traps
#1
Denis F Noubouossie, Matthew F Whelihan, Yuan-Bin Yu, Erica Sparkenbaugh, Rafal Pawlinski, Dougald M Monroe, Nigel S Key
NETosis is a physiological process in which neutrophils release their nuclear material in the form of neutrophil extracellular traps (NETs). NETs have been reported to directly promote thrombosis in animal models. Although the effects of purified NET components including DNA, histone proteins and neutrophil enzymes on coagulation have been characterized, the mechanism by which intact NETs promote thrombosis is largely unknown. In this study, human neutrophils were stimulated to produce NETs in platelet-free plasma (PFP) or in buffer using PMA or calcium ionophore...
December 5, 2016: Blood
https://www.readbyqxmd.com/read/27919910/ph-like-acute-lymphoblastic-leukemia-a-high-risk-subtype-in-adults
#2
Nitin Jain, Kathryn G Roberts, Elias Jabbour, Keyur Patel, Agda Karina Eterovic, Ken Chen, Patrick Zweidler-McKay, Xinyan Lu, Gloria Fawcett, Sa A Wang, Sergej Konoplev, Richard C Harvey, I-Ming Chen, Debbie Payne-Turner, Marcus Valentine, Deborah Thomas, Guillermo Garcia-Manero, Farhad Ravandi, Jorge Cortes, Steven Kornblau, Susan O'Brien, Sherry Pierce, Jeffrey Jorgensen, Kenna R Mills Shaw, Cheryl L Willman, Charles G Mullighan, Hagop Kantarjian, Marina Konopleva
Ph-like acute lymphoblastic leukemia (ALL) is a high-risk subtype of ALL in children. There are limited and conflicted data on the incidence and prognosis of Ph-like ALL in adults. Patients with newly-diagnosed B-ALL who received frontline chemotherapy at MD Anderson Cancer Center underwent gene expression profiling of leukemic cells to identify Ph-like ALL. Patients received hyper-CVAD (80%) or augmented-BFM (20%) regimen. Of 148 patients, 33.1% had Ph-like, 31.1% had Ph+, and 35.8% had other B-ALL subtypes (B-other)...
December 5, 2016: Blood
https://www.readbyqxmd.com/read/27919909/severe-anemia-early-in-life-as-a-risk-factor-for-sickle-cell-kidney-disease
#3
Inmaculada Aban, Sujatha Baddam, Lee M Hilliard, Thomas H Howard, Daniel Feig, Jeffrey D Lebensburger
No abstract text is available yet for this article.
December 5, 2016: Blood
https://www.readbyqxmd.com/read/27919908/targeting-the-pd-1-pd-l1-axis-in-multiple-myeloma-a-dream-or-a-reality
#4
Jacalyn Rosenblatt, David Avigan
PD-1/PD-L1 pathway is a negative regulator of immune activation that is up-regulated in multiple myeloma and is a critical component of the immunosuppressive tumor microenvironment. Expression is increased in advanced disease and in the presence of bone marrow stromal cells. PD-1/PD-L1 blockade is associated with tumor regression in several malignancies but single agent activity is limited in myeloma patients. Combination therapy involving strategies to expand myeloma specific T cells and T cell activation via PD-1/PD-L1 blockade are currently being explored...
December 5, 2016: Blood
https://www.readbyqxmd.com/read/27908882/efficacy-and-safety-of-long-term-rn-1-treatment-to-increase-hbf-in-baboons
#5
Vinzon Ibanez, Kestis Vaitkus, Angela Rivers, Robert Molokie, Shuaiying Cui, James Douglas Engel, Joseph DeSimone, Donald Lavelle
No abstract text is available yet for this article.
December 1, 2016: Blood
https://www.readbyqxmd.com/read/27908881/pre-clinical-studies-of-gilteritinib-a-next-generation-flt3-inhibitor
#6
Lauren Y Lee, Daniela Hernandez, Trivikram Rajkhowa, Samuel C Smith, Jayant Ranganathan Raman, Bao Nguyen, Donald Small, Mark Levis
Activating mutations in the receptor tyrosine kinase FLT3 comprise approximately one-third of genetic lesions in acute myeloid leukemia (AML) and are associated with a poor prognosis. Internal tandem duplication (FLT3-ITD) mutations in particular are associated with a high relapse rate. Although FLT3 tyrosine kinase inhibitors (TKIs) appear to improve clinical outcomes for patients with FLT3-ITD AML, the development of early-generation FLT3 TKIs has been impeded by several obstacles such as low potency and selectivity, myelosuppression, and the emergence of resistance-conferring point mutations...
December 1, 2016: Blood
https://www.readbyqxmd.com/read/27908880/an-anti-cd3-anti-cll-1-bispecific-antibody-for-the-treatment-of-acute-myeloid-leukemia
#7
Steven R Leong, Siddharth Sukumaran, Maria Hristopoulos, Klara Totpal, Shannon Stainton, Elizabeth Lu, Alfred Wong, Lucinda Tam, Robert Newman, Brian R Vuillemenot, Diego Ellerman, Chen Gu, Mary Mathieu, Mark S Dennis, Allen Nguyen, Bing Zheng, Crystal Zhang, Genee Lee, Yu-Waye Chu, Rodney A Prell, Kedan Lin, Steven T Laing, Andrew G Polson
Acute myeloid leukemia (AML) is major unmet medical need. Most patients have poor long-term survival and treatment has not significantly changed in 40 years. Recently, bispecific antibodies that redirect the cytotoxic activity of effector T-cells by binding to CD3, the signaling component of the T-cell receptor, and a tumor target have shown clinical activity. Notably, blinatumomab is approved to treat relapsed/refractory acute lymphoid leukemia. Here we describe the design, discovery, pharmacological activity, pharmacokinetics, and safety of a CD3 T-cell-dependent bispecific (TDB) full-length human IgG1 therapeutic antibody targeting CLL-1 that could potentially be used in humans to treat AML...
December 1, 2016: Blood
https://www.readbyqxmd.com/read/27903532/acquired-somatic-mutations-in-pnh-reveal-long-term-maintenance-of-adaptive-nk-cells-independent-from-hspc
#8
Marcus A F Corat, Heinrich Schlums, Chuanfeng Wu, Jakob Theorell, Diego A Espinoza, Stephanie E Sellers, Danielle M Townsley, Neal S Young, Yenan T Bryceson, Cynthia E Dunbar, Thomas Winkler
Natural killer (NK) cells have long been considered short-lived effectors of innate immunity. However, recent animal models and human studies suggest that subsets of NK cells have adaptive features. We investigate clonal relationships of various NK cell subsets, including the adaptive population, by taking advantage of naturally occurring X-linked somatic PIGA mutations in hematopoietic stem and progenitor cells (HSPC) from patients with paroxysmal nocturnal hemoglobinuria (PNH). The affected HSPCs and their progeny lack expression of glycosylphosphatidylinositol (GPI) anchors on their cell surfaces, allowing quantification of PIGA-mutant (GPI-negative) HSPC-derived peripheral blood cell populations...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903531/dream-plays-an-important-role-in-platelet-activation-and-thrombogenesis
#9
Kyungho Kim, Alan Tseng, Andrew Barazia, Joseph E Italiano, Jaehyung Cho
Downstream regulatory element antagonist modulator (DREAM), a transcriptional repressor, is known to modulate pain responses. However, it is unknown whether DREAM is expressed in anucleate platelets and plays a role in thrombogenesis. By using intravital microscopy with DREAM-null mice and their bone marrow chimeras, we demonstrated that both hematopoietic and non-hematopoietic cell DREAM are required for platelet thrombus formation following laser-induced arteriolar injury. In a FeCl3-induced thrombosis model, we found that compared to WT control and non-hematopoietic DREAM knockout (KO) mice, DREAM KO control and hematopoietic DREAM KO mice showed a significant delay in time to occlusion...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903530/near-haploid-and-low-hypodiploid-acute-lymphoblastic-leukemia-two-distinct-subtypes-but-consistently-poor-prognosis
#10
Setareh Safavi, Kajsa Paulsson
Hypodiploidy <40 chromosomes is an uncommon genetic feature of acute lymphoblastic leukemia (ALL) in both children and adults. It has long been clear by cytogenetic analyses, and recently confirmed by mutational profiling, that these cases may be further subdivided into two subtypes: near-haploid ALL with 24-30 chromosomes and low hypodiploid ALL with 31-39 chromosomes. Both groups are associated with a very poor prognosis and these patients are among those who could benefit most from novel treatments.
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903529/angiocrine-bmp2-signaling-in-murine-liver-controls-normal-iron-homeostasis
#11
Philipp-Sebastian Koch, Victor Olsavszky, Friederike Ulbrich, Carsten Sticht, Alexandra Demory, Thomas Leibing, Thomas Henzler, Mathias Meyer, Johanna Zierow, Sven Schneider, Katja Breitkopf-Heinlein, Haristi Gaitantzi, Bradley Spencer-Dene, Bernd Arnold, Kay Klapproth, Kai Schledzewski, Sergij Goerdt, Cyrill Géraud
Microvascular endothelial cells (EC) display a high degree of phenotypic and functional heterogeneity among different organs. Organ-specific EC control their tissue microenvironment by angiocrine factors in health and disease. Liver sinusoidal EC (LSEC) are uniquely differentiated to fulfil important organ-specific functions in development, under homeostatic conditions, and in regeneration and liver pathology. Recently, Bmp2 has been identified by us as an organ-specific angiokine derived from LSEC. To study angiocrine Bmp2 signaling in the liver, we conditionally deleted Bmp2 in LSEC using EC subtype-specific Stab2-Cre mice...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903528/consensus-guidelines-for-the-diagnosis-and-management-of-patients-with-classic-hairy-cell-leukemia
#12
Michael R Grever, Omar Abdel-Wahab, Leslie A Andritsos, Versha Banerji, Jacqueline Barrientos, James S Blachly, Timothy G Call, Daniel Catovsky, Claire Dearden, Judit Demeter, Monica Else, Francesco Forconi, Alessandro Gozzetti, Anthony D Ho, James B Johnston, Jeffrey Jones, Gunnar Juliusson, Eric Kraut, Robert J Kreitman, Loree Larratt, Francesco Lauria, Gerard Lozanski, Emili Montserrat, Sameer A Parikh, Jae H Park, Aaron Polliack, Graeme R Quest, Kanti R Rai, Farhad Ravandi, Tadeusz Robak, Alan Saven, John F Seymour, Tamar Tadmor, Martin S Tallman, Constantine Tam, Enrico Tiacci, Xavier Troussard, Clive S Zent, Thorsten Zenz, Pier Luigi Zinzani, Brunangelo Falini
Hairy cell leukemia is an uncommon hematologic malignancy characterized by pancytopenia and marked susceptibility to infection. Tremendous progress in the management of patients with this disease has resulted in high response rates and improved survival, yet relapse and an appropriate approach to re-treatment present continuing areas for research. The disease and its effective treatment are associated with immunosuppression. As more patients are being treated with alternative programs, comparison of results will require general agreement on definitions of response, relapse, and methods of determining minimal residual disease...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903527/standardized-flow-cytometry-for-highly-sensitive-mrd-measurements-in-b-cell-acute-lymphoblastic-leukemia
#13
Prisca Theunissen, Ester Mejstrikova, Lukasz Sedek, Alita J van der Sluijs-Gelling, Giuseppe Gaipa, Marius Bartels, Elaine Sobral da Costa, Michaela Kotrova, Michaela Novakova, Edwin Sonneveld, Chiara Buracchi, Paola Bonaccorso, Elen Oliviera, Jeroen G Te Marvelde, Tomasz Szczepanski, Ludovic Lhermitte, Ondrej Hrusak, Quentin Lecrevisse, Georgiana Emilia Grigore, Eva Fronkova, Jan Trka, Monika Brüggemann, Alberto Orfao, Jacques J M van Dongen, Vincent H J van der Velden
A fully-standardized EuroFlow 8-color antibody panel and laboratory procedure was stepwise designed to measure minimal residual disease (MRD) in B-cell precursor (BCP) acute lymphoblastic leukemia (ALL) patients with a sensitivity of ≤10(-5), comparable to real-time quantitative (RQ)-PCR-based MRD detection via antigen-receptor rearrangements. Leukocyte markers and the corresponding antibodies and fluorochromes were selected based on their contribution in separating BCP-ALL cells from normal/regenerating BCP cells in multidimensional principal component analyses...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903526/hepcidin-upregulation-by-inflammation-is-independent-of-smad1-5-8-signaling-by-activin-b
#14
Céline Besson-Fournier, Aurélie Gineste, Chloé Latour, Ophélie Gourbeyre, Delphine Meynard, Patricia Martin, Eric Oswald, Hélène Coppin, Marie-Paule Roth
No abstract text is available yet for this article.
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903525/glycosylphosphatidylinositol-specific-t-cells-ifn%C3%AE-producing-t-cells-and-pathogenesis-of-idiopathic-aplastic-anemia
#15
Lucia Gargiulo, Yoshitaka Zaimoku, Barbara Scappini, Hiroyuki Maruyama, Rie Ohumi, Lucio Luzzatto, Shinji Nakao, Rosario Notaro
No abstract text is available yet for this article.
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27903524/graft-versus-host-disease-targets-ovary-and-causes-female-infertility-in-mice
#16
Sonoko Shimoji, Daigo Hashimoto, Hidetsugu Tsujigiwa, Kohta Miyawaki, Koji Kato, Shuichiro Takahashi, Reiki Ogasawara, Takashi Jiromaru, Hiromi Iwasaki, Toshihiro Miyamoto, Koichi Akashi, Takanori Teshima
Infertility associated with ovarian failure is a serious late complication for female survivors of allogeneic hematopoietic stem cell transplantation (SCT). While the role of pretransplant conditioning regimen has been well appreciated, increasing application of reduced-intensity conditioning facilitated us to revisit the other factors possibly affecting ovarian function after allogeneic SCT. We have addressed whether donor T-cell mediated graft-versus-host disease (GVHD) could be causally related to female infertility in mice...
November 30, 2016: Blood
https://www.readbyqxmd.com/read/27899360/widespread-and-dynamic-translational-control-of-red-blood-cell-development
#17
Juan R Alvarez-Dominguez, Xu Zhang, Wenqian Hu
Cell development requires tight yet dynamic control of protein production. Here, we use parallel RNA and ribosome profiling to study translational regulatory dynamics during murine terminal erythropoiesis. We uncover pervasive translational control of protein synthesis, including widespread alternative translation initiation and termination, robust discrimination of long non-coding from micropeptide-encoding RNAs, and dynamic use of upstream reading frames. We further identify hundreds of mRNAs whose translation efficiency is dynamically controlled during erythropoiesis, and find that they enrich for target sites of RNA-binding proteins that are hematopoietic cell-specific, thus unraveling potential regulators of erythroid translational programs...
November 29, 2016: Blood
https://www.readbyqxmd.com/read/27899359/how-i-treat-atypical-chronic-myeloid-leukemia
#18
Jason Gotlib
Atypical chronic myeloid leukemia, BCR-ABL1-negative (aCML) is a rare myelodysplastic syndrome/myeloproliferative neoplasm for which no current standard of care exists. The challenges of atypical CML relate to its heterogeneous clinical and genetic features, high rate of transformation to acute myeloid leukemia, and historically poor survival. Therefore, allogeneic hematopoietic stem cell transplantation should always be an initial consideration for eligible patients with a suitable donor. Non-transplant approaches for treating aCML have otherwise largely relied on adopting treatment strategies used for MDS and MPN...
November 29, 2016: Blood
https://www.readbyqxmd.com/read/27899358/cytohesin-1-regulates-homing-and-engraftment-of-human-hematopoietic-stem-and-progenitor-cells
#19
Justyna Rak, Katie Foster, Katarzyna Potrzebowska, Mehrnaz Safaee Talkhoncheh, Natsumi Miharada, Karolina Komorowska, Therese Torngren, Anders Kvist, Åke Borg, Lena Svensson, Dominique Bonnet, Jonas Larsson
Adhesion is a key component of hematopoietic stem cell regulation mediating homing and retention to the niche in the bone marrow. Here, using an RNA interference screen, we identify cytohesin 1 (CYTH1) as a critical mediator of adhesive properties in primary human cord-blood derived hematopoietic stem and progenitor cells (HSPCs). Knockdown of CYTH1 disrupted adhesion of HSPC to primary human mesenchymal stroma cells (MSCs). Attachment to fibronectin and ICAM1, two integrin ligands, was severely impaired, and CYTH1 deficient cells showed a reduced integrin β1 activation response, suggesting that CYTH1 mediates integrin-dependent functions...
November 29, 2016: Blood
https://www.readbyqxmd.com/read/27899357/a-phase-iii-randomized-trial-comparing-inolimomab-vs-usual-care-in-steroid-resistant-acute-gvhd
#20
Gérard Socié, Stéphane Vigouroux, Ibrahim Yakoub-Agha, Jacques-Olivier Bay, Sabine Fürst, Karin Bilger, Felipe Suarez, Mauricette Michallet, Dominique Bron, Philippe Gard, Zakaria Medeghri, Philippe Lehert, Chinglin Lai, Tim Corn, Jean-Paul Vernant
Treatment of steroid resistant (SR) aGVHD remains an unmet clinical need. Inolimomab, a monoclonal antibody to CD25, has shown encouraging results in phase II trials. This phase III randomized, open-label, multicenter compared Inolimomab vs. usual care in adult patients with steroid-refractory aGvHD. Patients were randomized to treatment with Inolimomab or usual care [control group were all treated with Anti Thymocyte Globulin (ATG)]. The primary objective was to evaluate overall survival at 1 year without changing baseline allocated therapy...
November 29, 2016: Blood
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