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https://www.readbyqxmd.com/read/27909577/advances-in-the-understanding-and-clinical-management-of-mastocytosis-and-clonal-mast-cell-activation-syndromes
#1
REVIEW
David González-de-Olano, Almudena Matito, Alberto Orfao, Luis Escribano
Clonal mast cell activation syndromes and indolent systemic mastocytosis without skin involvement are two emerging entities that sometimes might be clinically difficult to distinguish, and they involve a great challenge for the physician from both a diagnostic and a therapeutic point of view. Furthermore, final diagnosis of both entities requires a bone marrow study; it is recommended that this be done in reference centers. In this article, we address the current consensus and guidelines for the suspicion, diagnosis, classification, treatment, and management of these two entities...
2016: F1000Research
https://www.readbyqxmd.com/read/27903712/the-myeloma-stem-cell-concept-revisited-from-phenomenology-to-operational-terms
#2
REVIEW
Hans Erik Johnsen, Martin Bøgsted, Alexander Schmitz, Julie Støve Bødker, Tarec Christoffer El-Galaly, Preben Johansen, Peter Valent, Niklas Zojer, Els Van Valckenborgh, Karin Vanderkerken, Mark van Duin, Pieter Sonneveld, Martin Perez-Andres, Alberto Orfao, Karen Dybkær
The concept of the myeloma stem cell may have important therapeutic implications, yet its demonstration has been hampered by a lack of consistency in terms and definitions. Here, we summarize the current documentation and propose single-cell in vitro studies for future translational studies. By the classical approach, a CD19(-)/CD45(low/-)/CD38(high)/CD138(+) malignant plasma cell, but not the CD19(+)/CD38(low/-) memory B cell compartment, is enriched for tumorigenic cells that initiate myeloma in xenografted immunodeficient mice, supporting that myeloma stem cells are present in the malignant PC compartment...
December 2016: Haematologica
https://www.readbyqxmd.com/read/27903527/standardized-flow-cytometry-for-highly-sensitive-mrd-measurements-in-b-cell-acute-lymphoblastic-leukemia
#3
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/27863261/a-next-generation-sequencing-strategy-for-evaluating-the-most-common-genetic-abnormalities-in-multiple-myeloma
#4
Cristina Jiménez, María Jara-Acevedo, Luis A Corchete, David Castillo, Gonzalo R Ordóñez, M Eugenia Sarasquete, Noemí Puig, Joaquín Martínez-López, M Isabel Prieto-Conde, María García-Álvarez, M Carmen Chillón, Ana Balanzategui, Miguel Alcoceba, Albert Oriol, Laura Rosiñol, Luis Palomera, Ana I Teruel, Juan J Lahuerta, Joan Bladé, María V Mateos, Alberto Orfão, Jesús F San Miguel, Marcos González, Norma C Gutiérrez, Ramón García-Sanz
Identification and characterization of genetic alterations are essential for diagnosis of multiple myeloma and may guide therapeutic decisions. Currently, genomic analysis of myeloma to cover the diverse range of alterations with prognostic impact requires fluorescence in situ hybridization (FISH), single nucleotide polymorphism arrays, and sequencing techniques, which are costly and labor intensive and require large numbers of plasma cells. To overcome these limitations, we designed a targeted-capture next-generation sequencing approach for one-step identification of IGH translocations, V(D)J clonal rearrangements, the IgH isotype, and somatic mutations to rapidly identify risk groups and specific targetable molecular lesions...
November 15, 2016: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/27846613/guidelines-for-diagnosis-prevention-and-management-of-central-nervous-system-involvement-in-diffuse-large-b-cell-lymphoma-patients-by-the-spanish-lymphoma-group-geltamo
#5
Francisco-Javier Peñalver, Juan-Manuel Sancho, Adolfo de la Fuente, Maria-Teresa Olave, Alejandro Martin, Carlos Panizo, Elena Pérez, Antonio Salar, Alberto Orfao
: Diffuse large B-cell lymphoma patients have a 5% overall risk of central nervous system events (relapse or progression), which account for high morbidity and frequently fatal outcomes(1) and shortened overall survival of <6 months.(2) Early diagnosis of central nervous system events is critical for successful treatment and improved prognosis. Identification of patients at risk of central nervous system disease is critical to accurately identify candidates for central nervous system- prophylaxis vs...
October 20, 2016: Haematologica
https://www.readbyqxmd.com/read/27825459/origin-of-waldenstrom-s-macroglobulinaemia
#6
REVIEW
Ramón García-Sanz, Cristina Jiménez, Noemí Puig, Bruno Paiva, Norma C Gutiérrez, Paula Rodríguez-Otero, Julia Almeida, Jesús San Miguel, Alberto Orfão, Marcos González, Martín Pérez-Andrés
Waldenstrom's macroglobulinaemia (WM) is an MYD88(L265P)-mutated lymphoplasmacytic lymphoma that invades bone marrow and secretes monoclonal immunoglobulin M (IgM). WM cells are usually unable to undergo class switch recombination, and have mutated IGHV, with a typical immunophenotype CD19(+)/CD22(low+)/CD23(-)/CD25(+)/CD27(+)/CD45(+)/CD38(low+)/SmIgM(+) (negative for CD5, CD10, CD11c, CD103). This immunophenotype matches memory B cells (smIgM(-/+)/CD10(-)/CD19(+)/CD20(+)/CD27(+)/CD38(low+)/CD45(+)), representing 30% of B cells in the blood...
June 2016: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/27766148/expression-profile-of-novel-cell-surface-molecules-on-different-subsets-of-human-peripheral-blood-antigen-presenting-cells
#7
Daniela Damasceno, Martín Pérez Andrés, Wouter Bl van den Bossche, Juan Flores-Montero, Sandra de Bruin, Cristina Teodosio, Jacques Jm van Dongen, Alberto Orfao, Julia Almeida
Although major steps have been recently made in understanding the role of the distinct subsets of dendritic cells (DC)/antigen-presenting cells (APC), further studies are required to unravel their precise role, including in-depth immunophenotypic characterisation of these cells. Here, we used eight-colour flow cytometry to investigate the reactivity of a panel of 72 monoclonal antibodies (including those clustered in seven new Cluster of Differentiation, CD) on different subsets of APC in peripheral blood (PB) samples from five healthy adults...
September 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/27758818/immunophenotypic-analysis-of-erythroid-dysplasia-in-myelodysplastic-syndromes-a-report-from-the-imdsflow-working-group
#8
Theresia M Westers, Eline M P Cremers, Uta Oelschlaegel, Ulrika Johansson, Peter Bettelheim, Sergio Matarraz, Alberto Orfao, Bijan Moshaver, Lisa Eidenschink Brodersen, Michael R Loken, Denise A Wells, Dolores Subira', Matthew Cullen, Jeroen G Te Marvelde, Vincent H J Van der Velden, Frank W M B Preijers, Sung-Chao Chu, Jean Feuillard, Estelle Guérin, Katherina Psarra, Anna Porwit, Leonie Saft, Robin Ireland, Timothy Milne, Marie C Béné, Birgit I Witte, Matteo G Della Porta, Wolfgang Kern, Arjan A van de Loosdrecht
Current recommendations for diagnosing myelodysplastic syndromes endorse flow cytometry as an informative tool. Most flow cytometry protocols focus on the analysis of progenitor cells and the evaluation of the maturing myelomonocytic lineage. However, one of the most frequently observed features of myelodysplastic syndromes is anemia, which may be associated with dyserythropoiesis. Therefore, analysis of changes in flow cytometry features of nucleated erythroid cells may complement current flow cytometry tools...
October 6, 2016: Haematologica
https://www.readbyqxmd.com/read/27733075/the-number-of-tumor-infiltrating-t-cell-subsets-in-lymph-nodes-from-patients-with-hodgkin-lymphoma-is-associated-with-the-outcome-after-first-line-abvd-therapy
#9
Sara Alonso-Álvarez, Maria Belén Vidriales, Maria Dolores Caballero, Oscar Blanco, Noemí Puig, Alejandro Martin, Maria Jesús Peñarrubia, Esther Zato, Josefina Galende, Abelardo Bárez, Miguel Alcoceba, Alberto Orfão, Marcos González, Ramón García-Sanz
Prognostic factors in Hodgkin lymphoma (HL) still fail to accurately identify high-risk patients. Tumor microenvironment in HL is a current focus of research for risk definition but few studies have focused on infiltrating lymphocytes. Here, we analyzed the number of tumor infiltrating lymphocytes by flow cytometry in diagnostic biopsies from 96 HL homogeneously treated patients with ABVD with or without radiotherapy. Most lymph node cells were lymphocytes (90 ± 17), with a median T/B/NK distribution of 74%/26%/0...
October 12, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27637164/re-evaluating-simpson-grades-i-ii-and-iii-resections-in-neurosurgical-treatment-of-world-health-organization-grade-i-meningiomas
#10
Alvaro Otero-Rodriguez, Maria Dolores Tabernero, Maria Cristina Munoz-Martin, Pablo Sousa, Alberto Orfao, Daniel Pascual-Argente, Maria Gonzalez-Tablas, Laura Ruiz-Martin
BACKGROUND: Since 1957, Simpson grading system is considered a predictive system for meningiomas recurrences. However, since then, there has been a great development of surgical equipment and neurosurgical technique, so the re-evaluation of this grading system should be considered. This study aims to assess if the recurrence rates and recurrence-free survivals (RFS) are different after Simpson grades I, II, and III resections in World Health Organization (WHO) grade I meningiomas METHOD: We retrospectively reviewed the data of patients who underwent surgical treatment of WHO grade I meningiomas located in convexity (group 1), falx/parasagittal (group 2), skull base, and tentorium (group 3) between June 1991 and December 2011...
September 13, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27598686/diagnostic-screening-of-paroxysmal-nocturnal-hemoglobinuria-prospective-multicentric-evaluation-of-the-current-medical-indications
#11
Marta Morado, Alex Freire Sandes, Enrique Colado, Dolores Subirá, Paloma Isusi, María Soledad Noya, María Belén Vidriales, Amparo Sempere, José Ángel Díaz, Alfredo Minguela, Beatriz Álvarez, Cristina Serrano, Teresa Caballero, Mercedes Rey, Ana Pérez Corral, María Cristina Fernández Jiménez, Elena Magro, Angelina Lemes, Celina Benavente, Helena Bañas, Juana Merino, Celine Castejon, Olivier Gutierrez, Pilar Rabasa, Matheus Vescosi Gonçalves, Martin Perez-Andres, Alberto Orfao
BACKGROUND: Although consensus guidelines have been proposed in 2010 for the diagnostic screening of paroxysmal nocturnal hemoglobinuria (PNH) by flow cytometry (FCM), so far no study has investigated the efficiency of such medical indications in multicentric vs. reference laboratory settings. METHODS: Here we evaluate the efficiency of consensus medical indications for PNH testing in 3,938 peripheral blood samples submitted to FCM testing in 24 laboratories in Spain and one reference center in Brazil...
September 6, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27511158/international-myeloma-working-group-consensus-criteria-for-response-and-minimal-residual-disease-assessment-in-multiple-myeloma
#12
REVIEW
Shaji Kumar, Bruno Paiva, Kenneth C Anderson, Brian Durie, Ola Landgren, Philippe Moreau, Nikhil Munshi, Sagar Lonial, Joan Bladé, Maria-Victoria Mateos, Meletios Dimopoulos, Efstathios Kastritis, Mario Boccadoro, Robert Orlowski, Hartmut Goldschmidt, Andrew Spencer, Jian Hou, Wee Joo Chng, Saad Z Usmani, Elena Zamagni, Kazuyuki Shimizu, Sundar Jagannath, Hans E Johnsen, Evangelos Terpos, Anthony Reiman, Robert A Kyle, Pieter Sonneveld, Paul G Richardson, Philip McCarthy, Heinz Ludwig, Wenming Chen, Michele Cavo, Jean-Luc Harousseau, Suzanne Lentzsch, Jens Hillengass, Antonio Palumbo, Alberto Orfao, S Vincent Rajkumar, Jesus San Miguel, Herve Avet-Loiseau
Treatment of multiple myeloma has substantially changed over the past decade with the introduction of several classes of new effective drugs that have greatly improved the rates and depth of response. Response criteria in multiple myeloma were developed to use serum and urine assessment of monoclonal proteins and bone marrow assessment (which is relatively insensitive). Given the high rates of complete response seen in patients with multiple myeloma with new treatment approaches, new response categories need to be defined that can identify responses that are deeper than those conventionally defined as complete response...
August 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27479184/differentiation-stage-of-myeloma-plasma-cells-biological-and-clinical-significance
#13
B Paiva, N Puig, M T Cedena, B G de Jong, Y Ruiz, I Rapado, J Martinez-Lopez, L Cordon, D Alignani, J A Delgado, M C van Zelm, J J M Van Dongen, M Pascual, X Agirre, F Prosper, J I Martín-Subero, M-B Vidriales, N C Gutierrez, M T Hernandez, A Oriol, M A Echeveste, Y Gonzalez, S K Johnson, J Epstein, B Barlogie, G J Morgan, A Orfao, J Blade, M V Mateos, J J Lahuerta, J F San-Miguel
The notion that plasma cells (PCs) are terminally differentiated has prevented intensive research in multiple myeloma (MM) about their phenotypic plasticity and differentiation. Here, we demonstrated in healthy individuals (n=20) that the CD19-CD81 expression axis identifies three bone marrow (BM)PC subsets with distinct age-prevalence, proliferation, replication-history, immunoglobulin-production, and phenotype, consistent with progressively increased differentiation from CD19+CD81+ into CD19-CD81+ and CD19-CD81- BMPCs...
September 16, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27448981/imatinib-in-systemic-mastocytosis-a-phase-iv-clinical-trial-in-patients-lacking-exon-17-kit-mutations-and-review-of-the-literature
#14
Iván Alvarez-Twose, Almudena Matito, José Mário Morgado, Laura Sánchez-Muñoz, María Jara-Acevedo, Andrés García-Montero, Andrea Mayado, Carolina Caldas, Cristina Teodósio, Javier Ignacio Muñoz-González, Manuela Mollejo, Luis Escribano, Alberto Orfao
Resistance to imatinib has been recurrently reported in systemic mastocytosis (SM) carrying exon 17 KIT mutations. We evaluated the efficacy and safety of imatinib therapy in 10 adult SM patients lacking exon 17 KIT mutations, 9 of which fulfilled criteria for well-differentiated SM (WDSM). The World Health Organization 2008 disease categories among WDSM patients were mast cell (MC) leukemia (n = 3), indolent SM (n = 3) and cutaneous mastocytosis (n = 3); the remainder case had SM associated with a clonal haematological non-MC disease...
July 19, 2016: Oncotarget
https://www.readbyqxmd.com/read/27399615/co-oxidation-over-gold-supported-on-cs-li-and-ti-doped-cryptomelane-materials
#15
Sónia A C Carabineiro, Vera P Santos, M Fernando R Pereira, José J M Órfão, José L Figueiredo
Cryptomelane-type manganese oxides were synthesized by redox reaction under acid and reflux conditions. Different metals (cesium, lithium and titanium) were incorporated into the tunnel structure by the ion-exchange technique. Gold was loaded onto these materials (1wt%) by a double impregnation method. The obtained catalysts were characterized by high-resolution transmission electron microscopy, energy-dispersive X-ray spectrometry, scanning electron microscopy, X-ray diffraction and temperature-programmed reduction...
October 15, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27362793/diagnosis-of-chronic-lymphoproliferative-disorders-by-flow-cytometry-using-four-color-combinations-for-immunophenotyping-a-proposal-of-the-brazilian-group-of-flow-cytometry-gbcflux
#16
M M Sales, Siacp Ferreira, Mrv Ikoma, A F Sandes, M P Beltrame, N S Bacal, McA Silva, M Malvezzi, Igh Lorand-Metze, A Orfao, M Yamamoto
BACKGROUND: Multiparametric flow cytometry (MFC) is a powerful tool for the diagnosis of hematological malignancies and has been useful for the classification of chronic lymphoproliferative disorders (CLPD) according to the WHO criteria. Following the purposes of the Brazilian Group of Flow Cytometry (GBCFLUX), the aim of this report was to standardize the minimum requirements to achieve an accurate diagnosis in CLPDs, considering the different economic possibilities of the laboratories in our country...
June 30, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27210796/spectroscopic-studies-on-the-interaction-of-metallic-ions-with-an-imidazolyl-phenolic-system
#17
Ronaldo Barros Orfão, Jessica Alves, Fernando Heering Bartoloni
A fluorescent imidazolyl-phenolic compound was applied on the detection of metallic species (Cu(2+), Al(3+), Cr(3+) and Fe(3+)) in a CH3CN/H2O (95/5, v/v) media. The presence and concentration of these cations altered significantly the emission profile of the probe, mainly lowering the signal intensity at 466 nm, while a new emission band around 395 nm appeared (for the trivalent ions). These results were rationalized as a combination of collisional quenching (KSV in the 10(3)-10(4) L mol(-1) range) and formation of a coordinated compound...
July 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27196886/ethyl-acetate-abatement-on-copper-catalysts-supported-on-ceria-doped-with-rare-earth-oxides
#18
Sónia Alexandra Correia Carabineiro, Michalis Konsolakis, George Emmanouil-Nontas Marnellos, Muhammad Faizan Asad, Olívia Salomé Gonçalves Pinto Soares, Pedro Bandeira Tavares, Manuel Fernando Ribeiro Pereira, José Joaquim de Melo Órfão, José Luís Figueiredo
Different lanthanide (Ln)-doped cerium oxides (Ce0.5Ln0.5O1.75, where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt. %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N₂ adsorption at -196 °C, scanning/transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and temperature programmed reduction in H₂...
2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27069257/phenotypic-transcriptomic-and-genomic-features-of-clonal-plasma-cells-in-light-chain-amyloidosis
#19
Bruno Paiva, Joaquin Martinez-Lopez, Luis A Corchete, Beatriz Sanchez-Vega, Inmaculada Rapado, Noemi Puig, Santiago Barrio, Maria-Luz Sanchez, Diego Alignani, Marta Lasa, Alfonso García de Coca, Emilia Pardal, Alberto Oriol, Maria-Esther Gonzalez Garcia, Fernando Escalante, Tomás J González-López, Luis Palomera, José Alonso, Felipe Prosper, Alberto Orfao, Maria-Belen Vidriales, María-Victoria Mateos, Juan-Jose Lahuerta, Norma C Gutierrez, Jesús F San Miguel
Immunoglobulin light-chain amyloidosis (AL) and multiple myeloma (MM) are 2 distinct monoclonal gammopathies that involve the same cellular compartment: clonal plasma cells (PCs). Despite the fact that knowledge about MM PC biology has significantly increased in the last decade, the same does not apply for AL. Here, we used an integrative phenotypic, molecular, and genomic approach to study clonal PCs from 24 newly diagnosed patients with AL. Through principal-component-analysis, we demonstrated highly overlapping phenotypic profiles between AL and both monoclonal gammopathy of undetermined significance and MM PCs...
June 16, 2016: Blood
https://www.readbyqxmd.com/read/27028865/altered-neutrophil-immunophenotypes-in-childhood-b%C3%A2-cell-precursor-acute-lymphoblastic-leukemia
#20
Elen Oliveira, Thiago S Bacelar, Juana Ciudad, Maria Cecília M Ribeiro, Daniela R N Garcia, Lukasz Sedek, Simone F Maia, Daniel B Aranha, Indyara C Machado, Arissa Ikeda, Bianca F Baglioli, Nathalia Lopez-Duarte, Lisandra A C Teixeira, Tomasz Szczepanski, Maria Luiza M Silva, Marcelo G P Land, Alberto Orfao, Elaine S Costa
An increasing number of evidences suggest a genetic predisposition in acute lymphoblastic leukemia (ALL) that might favor the occurrence of the driver genetic alterations. Such genetic background might also translate into phenotypic alterations of residual hematopoietic cells. Whether such phenotypic alterations are present in bone marrow (BM) cells from childhood B-cell precursor (BCP)-ALL remains to be investigated. Here we analyzed the immunophenotypic profile of BM and peripheral blood (PB) maturing/matured neutrophils from 118 children with BCP-ALL and their relationship with the features of the disease...
April 26, 2016: Oncotarget
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