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Cytometry. Part B, Clinical Cytometry

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https://www.readbyqxmd.com/read/29438583/highlights-clinical-cytometry-94b2-b-brando
#1
Bruno Brando
No abstract text is available yet for this article.
February 13, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29415368/a-control-for-the-day-to-day-normalization-of-the-flow-cytometry-%C3%AE-h2ax-assay-for-clinical-routine
#2
Adam Viktorisson, Sherin T Mathew, Ola Hammarsten, Pegah Johansson
BACKGROUND: The phosphorylation of histone H2AX (γ-H2AX) at the DNA double-strand break (DSB) site is frequently used for quantifying DSBs and may be useful as a biomarker for clinical applications. We have previously reported a flow cytometry-based quantification of γ-H2AX for clinical routine. One major challenge, however, is the lack of a control sample for normalization of the day-to-day variation of the flow cytometry γ-H2AX assay. METHODS: Here, we report development of a mix-control sample containing peripheral blood mononuclear cells (PBMC) from 10 control individuals, for normalization of day-to-day variation of the flow cytometry-γ-H2AX assay...
February 7, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29381839/high-sensitivity-5-6-and-7-color-pnh-wbc-assays-for-both-canto-ii-and-navios-platforms
#3
D Robert Sutherland, Fernando Ortiz, Graeme Quest, Andrea Illingworth, Miroslav Benko, Rakesh Nayyar, Iuri Marinov
BACKGROUND: Paroxysmal Nocturnal Hemoglobinuria (PNH) is a rare acquired Hematopoietic Stem Cell disorder characterized by an inability to make glyco-phosphatidyl-inositol (GPI)-linked cell surface structures. Fluorescent proaerolysin (FLAER-Alexa488) is increasingly used to detect GPI-deficient WBCs by flow cytometry. However, FLAER is not available in all countries and is expensive to obtain in others. An earlier study to compare FLAER-based and non-FLAER assays confirmed very good agreement between the two tubes suggesting a cost effective simultaneous evaluation of PNH neutrophils and monocytes is possible without FLAER...
January 30, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29360268/the-monoclonal-anti-cd157-antibody-clone-sy11b5-used-for-high-sensitivity-detection-of-pnh-clones-on-wbcs-fails-to-detect-a-common-polymorphic-variant-encoded-by-bst-1
#4
Johanna Blaha, Klaus Schwarz, Claudia Fischer, Peter Schauwecker, Britta Höchsmann, Hubert Schrezenmeier, Markus Anliker
BACKGROUND: CD157, encoded by BST-1, has been described as a useful flow cytometric marker for the analysis of paroxysmal nocturnal hemoglobinuria (PNH) as it is a glycosylphosphatidylinositol (GPI)-linked molecule highly expressed on normal monocytes and neutrophils. We and others observed isolated CD157 signal dropouts during intended PNH analysis. We hypothesize that these negative populations occur due to an antibody failure. To investigate the reason for this finding, we compared two different anti-CD157 antibody clones for PNH analysis...
January 23, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29316178/evaluation-of-cd229-as-a-new-alternative-plasma-cell-gating-marker-in-the-flow-cytometric-immunophenotyping-of-monoclonal-gammopathies
#5
Prashant R Tembhare, Sitaram Ghogale, Wilma Tauro, Yajamanam Badrinath, Nilesh Deshpande, Shweta Kedia, Keziah Cherian, Nikhil V Patkar, Gaurav Chatterjee, Sumeet Gujral, Papagudi G Subramanian
BACKGROUND: Current flow-cytometric plasma cell (PC) gating is based on CD138, CD38 and CD45 expression. CD138 is known for variable expression and loss during storage and processing. Introduction of anti-CD38 and anti-CD138 monoclonal-antibody therapies has limited the use of these markers during follow-up. Hence, additional reliable PC-gating markers are required. Recently, CD229 has been claimed as an alternative PC-gating marker. However, these studies are limited to a small cohort of samples...
January 9, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29316248/a-standardized-flow-cytometry-procedure-for-the-monitoring-of-regulatory-t-cells-in-clinical-trials
#6
Pitoiset Fabien, Barbié Michèle, Monneret Guillaume, Braudeau Cécile, Pochard Pierre, Pellegrin Isabelle, Trauet Jacques, Labalette Myriam, Klatzmann David, Rosenzwajg Michelle
BACKGROUND: Quantification of regulatory T cells is crucial in immunomonitoring in clinical trials as this cell population has been shown to be involved in a wide range of diseases, including cancers, autoimmune diseases, infections and allergies. Human regulatory T cells are defined as CD4+ CD25+ CD127low FoxP3+ cells, and the standardization of their staining by flow cytometry is a challenge, especially in multicenter clinical trials, notably because of the intracellular location of FoxP3...
January 6, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29316245/flow-cytometric-aberrancies-in-plasma-cell-myeloma-and-mgus-correlation-with-laboratory-parameters
#7
Sarika Gupta, Nitin J Karandikar, Timothy Ginader, Andrew M Bellizzi, Carol J Holman
BACKGROUND: Multiparametric flow cytometry (MFC) is a useful tool for diagnosis of plasma cell dyscrasias and assessment of minimal residual disease (MRD) in plasma cell myeloma (PCM). However, the immunophenotypic differences between the clonal plasma cells (PCs) of plasma cell myeloma (PCM) and those of monoclonal gammopathy of undetermined significance (MGUS) as well as the correlation of these flow cytometric markers with pertinent laboratory parameters have not been evaluated. METHODS: We retrospectively identified all newly diagnosed treatment-naive PCM and MGUS patients between 09/2014 and 06/2015 who underwent 10-color flow-cytometric evaluation: CD45, CD38, CD138, cKappa, cLambda, CD19, CD27, CD28, CD56, CD117...
January 6, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29316199/usefulness-of-the-cllflow-score
#8
Marc Sorigue, Mireia Franch-Sarto, Edurne Sarrate, Jordi Junca
BACKGROUND: The CLLflow score was recently suggested as an improvement over the Moreau score (MS) for the diagnosis and classification of B-cell lymphoproliferative disorders (B-LPD). METHODS: We determined the CLLflow score in peripheral blood or bone marrow of a series of cases with an inconclusive immunophenotype, including samples with a MS of 3 (n = 52) and CD5-positive with a score of 2 (n = 38). As controls, B-LPD with a MS of 0-1 (n = 95), CD5-negative score 2 (n = 24), and score 4-5 (i...
January 6, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29293288/leptomeningeal-myelomatosis-diagnosed-by-an-eight-color-single-tube-in-dried-formulation-a-case-report
#9
LETTER
Giovanni Carulli, Francesco Caracciolo, Paola Sammuri, Cristiana Domenichini, Angela Tarasco, Martina Rousseau, Virginia Ottaviano, Mario Petrini
No abstract text is available yet for this article.
January 2, 2018: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29251828/iccs-escca-consensus-guidelines-for-the-flow-cytometric-testing-for-patients-with-suspected-paroxysmal-nocturnal-hemoglobinuria-pnh-validation-and-quality-assurance-part-4
#10
Oldaker Teri, Liam Whitby, Maryam Saber, Jeannine Holden, Wallace Paul K, Virginia Litwin
Over the past six years, a diverse group of stakeholders have put forth recommendations regarding the analytical validation of flow cytometric methods and described in detail the differences between cell-based and traditional soluble analyte assay validations. This manuscript is based on these general recommendations as well as the published experience of experts in the area of PNH testing. The goal is to provide practical assay-specific guidelines for the validation of high-sensitivity flow cytometric PNH assays...
December 18, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29244250/human-innate-lymphoid-cells-ilcs-towards-a-uniform-immune-phenotyping
#11
REVIEW
Sara Trabanelli, Alejandra Gomez Cadena, Domenico Mavilio, Basile Nicolas Landis, Peter Jandus, Camilla Jandus
Helper Innate Lymphoid Cells (ILCs), the most recently identified population of the Innate Lymphoid Cell family, plays a fundamental role in the restoration of tissue integrity, in the protection against infiltrating pathogens as well as in tumor immune-surveillance. ILCs have been divided into three main subsets, ILC1, ILC2 and ILC3, that can be specifically activated by different signals coming either from pathogens or from other cell populations, including cancer cells. Following activation, ILCs are in turn able to promptly secrete a wide range of soluble mediators that modulate effector cell functions...
December 15, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29244249/flow-cytometric-false-myeloperoxidase-positive-childhood-b-lineage-acute-lymphoblastic-leukemia
#12
Süreyya Savaşan, Steven Buck, Manisha Gadgeel, Ali Gabali
BACKGROUND: Flow cytometric intracellular myeloperoxidase (MPO) staining of leukemic blasts is a useful tool in diagnosis of leukemia subtype. Interpretation of high MPO-positivity can be a diagnostic challenge in B-lineage acute lymphoblastic leukemia (B-ALL). While very few such cases have been reported, high MPO positive B-ALL cases without additional myeloid antigen positivity are suspect and require further investigation. METHODS: Three pediatric cases of B-ALL with strong MPO staining (clone 8E6; Invitrogen) at diagnosis and three others with negative MPO staining were studied by flow cytometry and immunohistochemistry...
December 15, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29244248/detection-of-fetomaternal-hemorrhage-and-abo-incompatibility
#13
LETTER
Eitan Fibach
No abstract text is available yet for this article.
December 15, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29236355/b-cell-specific-protein-fcrla-is-expressed-by-plasmacytoid-dendritic-cells-in-humans
#14
Evdokiya Reshetnikova, Sergey Guselnikov, Olga Volkova, Konstantin Baranov, Alexander Taranin, Ludmila Mechetina
BACKGROUND: Fc receptor-like A (FCRLA) is a unique member of a family of Fc receptor like-molecules that lacks a transmembrane region and is an ER-resident protein. In mice and humans, FCRLA has been known as a B cell specific protein. We report here that, in humans, FCRLA is also expressed in a subpopulation of plasmacytoid dendritic cells (pDCs). METHODS: Human peripheral blood mononuclear cells (PBMC), splenocytes, and tonsillar cells were stained for lineage markers followed by fixation/saponin permeabilization and intracellular staining for FCRLA, and then analyzed by flow cytometry with CD123 and CD303 used as pDC markers...
December 13, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29236353/iccs-escca-consensus-guidelines-for-the-high-sensitivity-flow-cytometric-detection-of-paroxysmal-nocturnal-hemoglobinuria-pnh-part-2-assay-optimization-and-reagent-selection
#15
EDITORIAL
D Robert Sutherland, Andrea Illingworth, Iuri Marinov, Fernando Ortiz, John Andreasen, Dan Payne, Paul K Wallace, Michael Keeney
Since publication in 2010 of the International Clinical Cytometry Society (ICCS) Consensus Guidelines for detection of Paroxysmal nocturnal hemoglobinuria (PNH) by flow cytometery, a great deal of work has been performed to develop, optimize and validate a number of high-sensitivity assays to detect PNH phenotypes in both Red Blood Cells (RBCs) and White Blood Cells (WBCs, neutrophils and monocytes). This section (Part 2) of the updated ICCS PNH Consensus Guidelines will focus on specific instrument setup for these PNH assays, the identification and proper testing of appropriate antibody conjugates and combinations therof, and basic assay design...
December 13, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29236352/iccs-escca-consensus-guidelines-for-the-clinical-utility-of-testing-for-gpi-anchor-deficient-clones-in-paroxysmal-nocturnal-hemoglobinuria-pnh-and-other-bone-marrow-disorders-part-1
#16
Amy E Dezern, Michael J Borowitz
Paroxysmal nocturnal hemoglobinuria (PNH) arises as a consequence of the non-malignant clonal expansion of one or more hematopoietic stem cells with an acquired somatic mutation of the PIGA gene.(1) Progeny of affected stem cells are deficient in glycosyl phosphatidylinositol-anchored proteins (GPI-APs). This deficiency is readily detected by flow cytometry. Though this seems straightforward, the clinical utility of this testing requires that the ordering clinician understand not only the characteristics of the test, but also the biology of the underlying disease, and the clinical and laboratory manifestations in the individual patient...
December 13, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29236350/iccs-escca-consensus-guidelines-to-detect-gpi-deficient-cells-in-paroxysmal-nocturnal-hemoglobinuria-pnh-and-related-disorders-part-3-data-analysis-reporting-and-case-studies
#17
Andrea Illingworth, Iuri Marinov, D Robert Sutherland, Orianne Wagner Ballon, Luigi DelVecchio
Over the past several years, a diverse group of physicians and other laboratory scientists have developed various recommendations and guidelines regarding best practices for PNH testing. This manuscript is based on these previous recommendations as well as various other relevant publications of experts in the area of PNH testing. The goal is to provide flow cytometry laboratories with an updated consensus approach to analysis and reporting of PNH results and to address the most common analytical challenges for accurate reporting of this rare disease...
December 13, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29220877/increased-circulating-plasma-cells-detected-by-flow-cytometry-predicts-poor-prognosis-in-patients-with-plasma-cell-myeloma
#18
Mi Hyun Bae, Chan-Jeoung Park, Bo Hyun Kim, Young-Uk Cho, Seongsoo Jang, Dong-Hyun Lee, Eul-Ju Seo, Dok Hyun Yoon, Jung-Hee Lee, Cheolwon Suh
BACKGROUND: Flow cytometry (FC) is a reliable tool for diagnosing and monitoring of plasma cell myeloma (PCM). Recent studies used FC for quantifying plasma cells (PCs) in peripheral blood (PB) using various panels, and an adverse prognostic effect of circulating PCs (cPCs) has been reported. We investigated the prognostic implication of cPCs quantified using a simple panel in patients with PCM. METHODS: Bone marrow (BM) and PB of 85 patients with PCM were analyzed by five-color FC at time of diagnosis...
December 8, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29220871/role-of-flow-cytometric-immunophenotyping-in-prediction-of-bcr-abl1-gene-rearrangement-in-adult-b-cell-acute-lymphoblastic-leukemia
#19
Francesco Corrente, Silvia Bellesi, Elisabetta Metafuni, Pier Luigi Puggioni, Sara Marietti, Angela Maria Ciminello, Tommaso Za, Federica Sorà, Luana Fianchi, Simona Sica, Valerio De Stefano, Patrizia Chiusolo
We performed a retrospective analysis of 88 adult patients with B-ALL diagnosed in our center by a flow-cytometric assessment. Immunophenotypic expression of leukemic cells was explored by simultaneous evaluation of positivity, percentage of expressing cells and median fluorescence intensity (MFI). BCR/ABL1 fusion transcripts were assessed by RT-PCR analysis and were identified in 36 patients (40.9%). CD10 and CD34 were positive in the totality of BCR/ABL1-positive cases. Patients with gene rearrangement had a greater frequency of CD66c, CD13 and CD33 positivity compared with BCR/ABL1-negative cases...
December 8, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29220870/quantitative-assessment-of-informative-immunophenotypic-markers-increases-the-diagnostic-value-of-immunophenotyping-in-mature-cd5-positive-b-cell-neoplasms
#20
Starostka David, Kriegova Eva, Kudelka Milos, Mikula Peter, Zehnalova Sarka, Radvansky Martin, Papajik Tomas, Kolacek David, Chasakova Katerina, Talianova Hana
BACKGROUND: The data on the clinical utility of the quantitative assessment of immunophenotypes in distinguishing mature CD5-positive B-cell neoplasms is limited. The study aim was to assess the diagnostic value of the quantitative assessment of a panel of 18 markers and to identify the most informative ones. METHODS: The immunophenotype of the neoplastic population was determined in diagnostic specimens from 188 patients. BD FACSCanto II flow cytometer and FACSDiva software were used to analyse the positivity/negativity and mean fluorescence intensity (MFI) of the surface expression of 18 markers...
December 8, 2017: Cytometry. Part B, Clinical Cytometry
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