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https://www.readbyqxmd.com/read/29319938/medical-devices-hematology-and-pathology-devices-classification-of-the-flow-cytometric-test-system-for-hematopoietic-neoplasms-final-order
#1
(no author information available yet)
The Food and Drug Administration (FDA or we) is classifying the flow cytometric test system for hematopoietic neoplasms into class II (special controls). The special controls that apply to the device type are identified in this order and will be part of the codified language for the flow cytometric test system for hematopoietic neoplasms' classification. We are taking this action because we have determined that classifying the device into class II (special controls) will provide a reasonable assurance of safety and effectiveness of the device...
December 27, 2017: Federal Register
https://www.readbyqxmd.com/read/29318955/case-report-of-igm-multiple-myeloma-diagnosing-a-rare-hematologic-entity
#2
Fernando Javier Bonilla-Valentín, Javier Cerra, William Cáceres-Perkins, Melissa Alsina
IgM multiple myeloma is an exceedingly rare hematologic entity comprising only less than 0.5% of multiple myeloma cases. Given the rarity of this disorder, it makes it a challenge to differentiate from other more prevalent hematologic disorders like Waldenstrom macroglobulinemia. These 2 diseases have the common finding of an IgM monoclonal gammopathy and distinguishing between these 2 diagnoses is of great importance given that therapy and prognosis differ significantly. This report illustrates the case of a 64-year-old man who presented with IgM lambda monoclonal gammopathy in whom signs, symptoms, laboratories, and imaging were initially thought to be consistent with Waldenstrom macroglobulinemia...
January 2018: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/29305999/high-fat-diet-induced-obesityexacerbateshematopoiesis-deficiency-and-cytopenia-caused-by-5-fluorouracil-via-ppar-%C3%AE
#3
Yanhong Li, Shuai Zhu, Yuanyuan Zhang, Ting Liu, Linchong Su, Qiuping Zhang, Yubin Luo
The present study aims to investigate the influence of high fat diet (HFD) on hematopoietic system recovery under stress condition caused by 5-Fluouracil (5-Fu) and evaluate the alleviating benefit of PPAR-γ inhibition on aggravation of 5-Fu-induced toxicity under HFD condition. Survival rate of HFD or normal diet (ND) mice was monitored after 5-Fu injection. HSC and the progenitor cells in bone marrow were detected at various time points after 5-Fu administration by flow cytometry. Genes expression involved in stem cell and platelet proliferation were tested by RT-PCR...
January 3, 2018: Experimental Hematology
https://www.readbyqxmd.com/read/29274771/determination-of-normal-expression-patterns-of-cd86-cd210a-cd261-cd262-cd264-cd358-and-cd361-in-peripheral-blood-and-bone-marrow-cells-by-flow-cytometry
#4
Renata Cristina Messores Rudolf-Oliveira, Mariangeles Auat, Chandra Chiappin Cardoso, Iris Mattos Santos-Pirath, Barbara Gil Lange, Jéssica Pires-Silva, Ana Carolina Rabello de Moraes, Gisele Cristina Dametto, Mayara Marin Pirolli, Maria Daniela Holthausen Périco Colombo, Maria Claudia Santos-Silva
In 2010, new monoclonal antibodies were submitted to the 9th International Workshop on Human Leukocyte Differentiation Antigens, and there are few studies demonstrating normal expression patterns of these markers. Thus, the objective of this study was to determine the normal patterns of cell expression of CD86, CD210a, CD261, CD262, CD264, CD358, and CD361 in peripheral blood (PB) and bone marrow (BM) samples by flow cytometry. In the present study, CD86 was expressed only in monocytes and B lymphocytes in PB and in monocytes and plasma cells in BM...
December 21, 2017: Immunology Letters
https://www.readbyqxmd.com/read/29248319/phase-2-trial-of-gemcitabine-cisplatin-plus-ipilimumab-in-patients-with-metastatic-urothelial-cancer-and-impact-of-dna-damage-response-gene-mutations-on-outcomes
#5
Matthew D Galsky, Huan Wang, Noah M Hahn, Przemyslaw Twardowski, Sumanta K Pal, Costantine Albany, Mark T Fleming, Alexander Starodub, Ralph J Hauke, Menggang Yu, Qianqian Zhao, Guru Sonpavde, Michael J Donovan, Vaibhav G Patel, John P Sfakianos, Josep Domingo-Domenech, William K Oh, Nicholas Akers, Bojan Losic, Sacha Gnjatic, Eric E Schadt, Rong Chen, Seunghee Kim-Schulze, Nina Bhardwaj, Andrew V Uzilov
BACKGROUND: Chemotherapy may exert immunomodulatory effects, thereby combining favorably with the immune checkpoint blockade. The pharmacodynamic effects of such combinations, and potential predictive biomarkers, remain unexplored. OBJECTIVE: To determine the safety, efficacy, and immunomodulatory effects of gemcitabine and cisplatin (GC) plus ipilimumab and explore the impact of somatic DNA damage response gene alterations on antitumor activity. DESIGN, SETTING, AND PARTICIPANTS: Multicenter single arm phase 2 study enrolling 36 chemotherapy-naïve patients with metastatic urothelial cancer...
December 13, 2017: European Urology
https://www.readbyqxmd.com/read/29245936/podocalyxin-promotes-proliferation-and-survival-in-mature-b-cell-non-hodgkin-lymphoma-cells
#6
Estíbaliz Tamayo-Orbegozo, Laura Amo, Marta Riñón, Naiara Nieto, Elena Amutio, Natalia Maruri, Miren Solaun, Arantza Arrieta, Susana Larrucea
Podocalyxin (PCLP1) is a CD34-related sialomucin expressed by some normal cells and a variety of malignant tumors, including leukemia, and associated with the most aggressive cancers and poor clinical outcome. PCLP1 increases breast tumor growth, migration and invasion; however, its role in hematologic malignancies still remains undetermined. The purpose of this study was to investigate the expression and function of PCLP1 in mature B-cell lymphoma cells. We found that overexpression of PCLP1 significantly increases proliferation, cell-to-cell interaction, clonogenicity, and migration of B-cell lymphoma cells...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29230822/rapid-prediction-of-stem-cell-mobilization-using-volume-and-conductivity-data-from-automated-hematology-analyzers
#7
Carlos H Villa, Thomas Porturas, Mary Sell, Mark Wall, Gene DeLeo, Jenna Fetters, Sam Mignono, Leah Irwin, Wei-Ting Hwang, Una O'Doherty
BACKGROUND: Rapid analytics to predict circulating hematopoietic stem cells are valuable for optimal management of mobilization, particularly for the use of newer and costly mobilization agents such as plerixafor. STUDY DESIGN AND METHODS: We used stepwise, linear multiple regression modeling applied to cell population data collected by routine hematology analyzers (Beckman Coulter DxH 800) on patients undergoing autologous stem cell collection (n = 131). Beta coefficients were used to derive a formula for a stem cell index (SCI)...
December 11, 2017: Transfusion
https://www.readbyqxmd.com/read/29216392/dioxin-like-pcb-126-increases-systemic-inflammation-and-accelerates-atherosclerosis-in-lean-ldl-receptor-deficient-mice
#8
Michael C Petriello, J Anthony Brandon, Jessie Hoffman, Chunyan Wang, Himi Tripathi, Ahmed Abdel-Latif, Xiang Ye, Xiangan Li, Liping Yang, Eun Lee, Sony Soman, Jazmyne Barney, Banrida Wahlang, Bernhard Hennig, Andrew J Morris
Exposure to dioxins and related persistent organic pollutants likely contributes to cardiovascular disease (CVD) risk through multiple mechanisms including the induction of chronic inflammation. Epidemiological studies have shown that leaner individuals may be more susceptible to the detrimental effects of lipophilic toxicants because they lack large adipose tissue depots that can accumulate and sequester these pollutants. This phenomenon complicates efforts to study mechanisms of pollutant-accelerated atherosclerosis in experimental animal models where high-fat feeding and adipose expansion limit the bioavailability of lipophilic pollutants...
December 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29211557/acoustophoretic-purification-of-platelets-feasibility-and-impact-on-platelet-activation-and-function
#9
Pierre Bohec, Jérémie Gachelin, Véronique Ollivier, Thibaut Mutin, Xavier Télot, Benoît Ho-Tin-Noé, Sandra Sanfilippo
Purity, limited platelet activation, and preservation of platelet function are important stakes of preparation of platelet concentrates (PC) for clinical use. In fact, contaminating red blood cells and leukocytes, as well as activated and/or poorly functional platelets in PC, represents a risk of poor efficiency and adverse side effects during platelet transfusion. Therefore, optimization of preparation and storage of PC is still an active field of research. Shear-induced platelet activation is an unwanted side effect of the hard-spin (up to 5000g) step of centrifugation-based methods currently used in blood banks to prepare PC from whole blood samples...
December 6, 2017: Platelets
https://www.readbyqxmd.com/read/29201539/assessment-of-cerebral-blood-flow-with-magnetic-resonance-imaging-in-children-with-sickle-cell-disease-a-quantitative-comparison-with-transcranial-doppler-ultrasonography
#10
Paula L Croal, Jackie Leung, Przemyslaw Kosinski, Manohar Shroff, Isaac Odame, Andrea Kassner
Introduction: Transcranial Doppler ultrasonography (TCD) is a clinical tool for stratifying ischemic stroke risk by identifying abnormal elevations in blood flow velocity (BFV) in the middle cerebral artery (MCA). However, TCD is not effective at screening for subtle neurologic injury such as silent cerebral infarcts. To better understand this disparity, we compared TCD measures of BFV with tissue-level cerebral blood flow (CBF) using arterial spin-labeling MRI in children with and without sickle cell disease, and correlated these measurements against clinical hematologic measures of disease severity...
November 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29200164/neuropilin-1-cd304-expression-by-flow-cytometry-in-pediatric-precursor-b-acute-lymphoblastic-leukemia-a-minimal-residual-disease-and-potential-prognostic-marker
#11
Hala M Abaza, Mervat A A Alfeky, Deena S Eissa, Mona F Abdel Fattah, Laila M Annaka, Fatma S Ebeid
Flow cytometry (FCM) is used for quantification of minimal residual disease (MRD) in acute lymphoblastic leukemia (ALL) through discriminating leukemic B-lymphoblasts from normal B-cell precursor counterparts "hematogones." Neuropilin-1 (NRP-1)/CD304 is a vascular endothelial growth factor receptor implicated in the progression of hematological malignancies. We evaluated NRP-1/CD304 as MRD and prognostic marker in pediatric precursor B-ALL using FCM. Seventy children with precursor B-ALL and 40 control children were enrolled...
December 1, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29197680/increased-co-expression-of-pd-1-tigit-and-klrg-1-on-tumor-reactive-cd8-t-cells-during-relapse-after-allo-sct
#12
Tim J A Hutten, Wieger J Norde, Rob Woestenenk, Ruo Chen Wang, Frans Maas, Michel Kester, J H Frederik Falkenburg, Sofia Berglund, Leo Luznik, Joop H Jansen, Nicolaas Schaap, Harry Dolstra, Willemijn Hobo
Allogeneic stem cell transplantation (allo-SCT) can be a curative treatment for patients with a hematological malignancy due to allo-reactive T cell responses recognizing minor histocompatibility antigens (MiHA). Yet, tumor immune escape mechanisms can cause failure of T cell immunity, leading to relapse. Tumor cells display low expression of co-stimulatory molecules and can up-regulate co-inhibitory molecules that, upon ligation with their counter receptors on the tumor-reactive T cells, inhibit T cell functionality...
November 29, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29193103/intravenous-immunoglobulin-induced-acute-thrombocytopenia
#13
Anna Gurevich-Shapiro, Lilach Bonstein, Galia Spectre, Nardeen Atweh, Tsipora Gruenewal, Michael Shapiro, Boaz Tadmor, Pia Raanani
BACKGROUND: Intravenous immunoglobulin (IVIG) has known efficacy in various hematologic conditions, including immune thrombocytopenic purpura. STUDY DESIGN AND METHODS: We present the clinical course of a patient with splenic marginal zone lymphoma, who developed acute thrombocytopenia on three consecutive episodes, with nadir counts of 27 × 109 , 50 × 109 , and 9 × 109 /L, upon administration of Intratect IVIG for hypogammaglobulinemia. An immunofluorescence test applying flow cytometry and monoclonal antibody immobilization of platelet antigens (MAIPA) assay were used to evaluate the reaction between IgG present in the IVIG preparations and the patient's or healthy donors' platelets (PLTs)...
November 29, 2017: Transfusion
https://www.readbyqxmd.com/read/29171939/initial-flow-cytometric-evaluation-of-the-clearllab-lymphoid-screen
#14
B D Hedley, G Cheng, J Luider, W Kern, G Lozanski, I Chin-Yee, L E Lowes, M Keeney, D Careaga, R Magari, L Tejidor
INTRODUCTION: Flow cytometric immunophenotyping (FCI) is an integral part in the diagnosis and classification of hematologic malignancies. FCI results also influence therapeutic decisions and disease prognosis. ClearLLab LS is a 12-antibody 10-color cocktail provided in dry format designed as a screen for patients suspected of having hematolymphoid disease. METHODS: A blinded comparison between ClearLLab LS, (CD8-FITC,Kappa-FITC,CD4-PE,Lambda-PE,CD19-ECD,CD56-PE-Cy5...
November 24, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29168147/generation-and-characterization-of-tissue-type-plasminogen-activator-transgenic-rats
#15
Yusuke Ito, Kengo Noguchi, Yoshiyuki Morishima, Kyoji Yamaguchi
To address a species difference in the responsiveness to human recombinant tissue-type plasminogen activator (rt-PA) between rats and humans, tPA transgenic (Tg) rats were generated and characterized. In the rats, transcriptional regulation of tPA was designed under the control of the endogenous tPA promoter. There were no significant differences in hematological parameters between the tPA Tg and non Tg rats. Plasma tPA concentration was significantly increased and serum free PAI-1 was significantly decreased in the tPA Tg rats...
November 22, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29168113/dynamics-of-bone-marrow-vsels-and-hscs-in-response-to-treatment-with-gonadotropin-and-steroid-hormones-during-pregnancy-and-evidence-to-support-their-asymmetric-symmetric-cell-divisions
#16
Ranita Ganguly, Sidhanath Metkari, Deepa Bhartiya
Gender plays an important role in the incidence of hematological malignancies and recently hematopoietic stem cells (HSCs) were found to proliferate more in females that gets further augmented during pregnancy. It was suggested that since basal numbers of HSCs remain the same in both sexes, possibly HSCs in females undergo increased self-renewal and apoptosis. Then how is self-renewal of stem cells regulated in males? More important, do HSCs undergo asymmetric cell divisions (ACD) or a more primitive population of pluripotent, very small embryonic-like stem cells (VSELs) undergo ACD to self-renew and specify into HSCs? Lot more clarity is required on the bone marrow stem cells biology...
November 22, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/29166708/-effects-of-astragalus-polysaccharide-on-cardiac-dysfunction-in-rabbits-with-severe-scald-injury
#17
L Zhong, J H Zhan, J H Luo, X Cheng
Objective: To investigate the effects of astragalus polysaccharide (AP) on cardiac dysfunction in rabbits with severe scald injury. Methods: Sixty-four New Zealand white rabbits were divided into pure scald group and AP group according to the random number table, with 32 rabbits in each group. Rabbits in the two groups were all inflicted with 30% total body surface area full-thickness scald on the back. Immediately after injury, rabbits in two groups were intraperitoneally injected with lactated Ringer's solution once for antishock...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29165737/management-of-hemostasis-for-pediatric-patients-on-ventricular-assist-devices
#18
Iki Adachi, Vadim Kostousov, Lisa Hensch, Martin A Chacon-Portillo, Jun Teruya
Ventricular-assist devices (VADs) have seen increased utilization in the pediatric population. Formerly, this therapeutic modality was limited to only the pulsatile VAD, EXCOR (Berlin Heart GmbH). However, the continuous flow VAD devices, HeartMate II (Abbott Inc.) and HeartWare (Medtronic Inc.), are now increasingly used in this population. Postoperatively, VAD patients are acutely anticoagulated using unfractionated heparin, often beginning 24 to 48 hours after VAD placement. Once the patient is stabilized and ready to transition to a lower acuity or outpatient setting, low-molecular-weight heparin or warfarin therapy may be instituted...
November 17, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/29156176/management-of-patients-with-left-ventricular-assist-devices-requiring-teeth-extraction-is-halting-anticoagulation-appropriate
#19
Visakha Suresh, Muath Bishawi, Michael W Manning, Chetan Patel, Joseph Rogers, Carmelo Milano, Jacob Schroder, Mani Daneshmand, David Powers
PURPOSE: An increasing number of patients with end-stage heart failure are supported with left ventricular assist device (LVAD) implantation and must be maintained on a consistent anticoagulation regimen. Pre-emptive extraction of carious teeth in these patients is necessary to prevent seeding of the implanted device and endocarditis. Thus, the objective of this study was to evaluate bleeding complications after minor oral surgery, specifically teeth extractions, in this unique patient population requiring long-term anticoagulation...
October 31, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29151902/coexistence-of-p210bcr-abl-and-cbf%C3%AE-myh11-fusion-genes-in-myeloid-leukemia-a-report-of-4-cases
#20
Yuan-Yuan Wang, Wen-Jing Ding, Feng Jiang, Zi-Xing Chen, Jian-Nong Cen, Xiao-Fei Qi, Jian-Ying Liang, Dan-Dan Liu, Jin-Lan Pan, Su-Ning Chen
Numerous acquired molecular and cytogenetic abnormalities are strongly associated with hematological malignancies. The breakpoint cluster region-ABL proto-oncogene 1 (BCR-ABL) rearrangement leads to a p210 chimeric protein in typical chronic myeloid leukemia (CML), whereas 17-25% of patients with acute lymphocytic leukemia and 0.9-3% patients with de novo acute myeloid leukemia (AML) carry a p190BCR-ABL fusion protein. Cases of patients with AML/CML carrying two specific primary molecular changes, BCR-ABL and core binding factor-β-myosin heavy chain 11 (CBFβ-MYH11) fusion genes have been rarely reported...
November 2017: Oncology Letters
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