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Promyelocytic leukemia

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https://www.readbyqxmd.com/read/28644154/acute-promyelocytic-leukemia-and-chronic-lymphocytic-leukemia-concomitant-presentation-of-two-molecularly-distinct-entities
#1
Jingdong Su, Diana Veillon, Rodney Shackelford, James Cotelingam, Hazem El-Osta, Glenn Mills, Reinhold Munker, Srinivas Devarakonda
Acute myeloid leukemia (AML) developing in patients with chronic lymphocytic leukemia (CLL) is very uncommon and usually associated with prior treatment. Acute promyelocytic leukemia (APL) accounts for a very small proportion of treatment-associated AML. So far, there has been only one reported case of APL occurring post radiation for prostate cancer in a patient with CLL. We report herein the first case of APL and CLL presenting concomitantly in an untreated patient. Evaluation of peripheral blood and bone marrow aspirate with immunohistochemistry, flow cytometry, and FISH to confirm two morphologically, molecularly and genetically distinct leukemic populations characteristic of APL and CLL is required...
May 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28641624/-relationship-between-peripheral-blood-white-blood-cell-count-and-early-death-rate-in-patients-with-acute-promyelocytic-leukemia
#2
Huai-Yu Wang, Xin-Xin Zhang, Hui-Yun Zhang, Jing Wang, Li-Mei Chen, Meng-Chang Wang, Jie-Ying Xi, Ming Xie, Ting Fan
OBJECTIVE: To investigate the relationship between peripheral white blood cell count and early death rate of the patients with acute promyelocytic leukemia (APL). METHODS: Through retrospective study, the relationship of early death rate in 116 cases newly diagnosed APL patients with maximum of peripheral blood white blood cell count should be analyzed before and after induction therapy as well as in the whole course of disease during the past 8 years. RESULTS: There was a close relationship between the peripheral white blood cell count and the early death rate in APL patients...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641620/-role-of-microparticles-derived-from-acute-promyelocytic-leukemia-cells-in-coagulopathy
#3
Ying-Mei Zhang, Bo Chen, Long-Yue Wu, Jin-Xiao Hou, Jin-Yue Fu
OBJECTIVE: To evaluate the role of microparticle (MP) derived from acute promyelocytic leukemia (APL) cells and tissue factor (TF) carried by the MP in hypercoagulable state, and the effect of treatment with cytotoxic chemotherapy/differentiating agents on procoagulant activity (PCA) of these MP. METHODS: Bone marrow mononuclear cells (BMMNC) were extracted from 5 APL patients and 5 sex- and age- matched patients with iron deficiency anemia as controls. The cells were cultured in vitro for 48 h, then MP-rich culture medium and MP-free culture medium were harvested and MP was further obtained from certain volume of MP-rich culture medium...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641467/green-tea-polyphenol-egcg-causes-anti-cancerous-epigenetic-modulations-in-acute-promyelocytic-leukemia-cells
#4
Veronika Borutinskaitė, Aida Virkšaitė, Giedrė Gudelytė, Rūta Navakauskienė
Green tea (Camellia sinensis) catechin epigallocatechin-3-gallate (EGCG) has been shown to possess diverse anti-cancerous properties. We demonstrated EGCG ability to inhibit acute promyelocytic leukemia (APL) cell proliferation and cause apoptosis. In addition, quantitative real-time polymerase chain reaction (RT-qPCR) analysis revealed elevated expression of genes associated with cell cycle arrest and differentiation (p27, PCAF, C/EBPα, and C/EBPɛ). Furthermore, EGCG caused anti-cancerous epigenetic changes: downregulation of epigenetic modifiers DNMT1, HDAC1, HDAC2, and G9a was observed by RT-qPCR analysis...
June 22, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28639251/regulation-of-the-extracellular-serpina5-protein-c-inhibitor-penetration-through-cellular-membranes
#5
Felix C Wahlmüller, Hanjiang Yang, Margareta Furtmüller, Margarethe Geiger
It is generally accepted that the phospholipid bilayer of the cell membrane is impermeable for proteins and peptides and that these molecules require special mechanisms for their transport from the extra- to the intracellular space. Recently there is increasing evidence that certain proteins/peptides can also directly cross the phospholipid membrane. SERPINA5 (protein C inhibitor) is a secreted protease inhibitor with broad protease reactivity and wide tissue distribution. It binds glycosaminoglycans and certain phospoholipids, which can modulate its inhibitory activity...
June 22, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28635660/diverse-regulation-of-vitamin-d-receptor-gene-expression-by-1-25-dihydroxyvitamin-d-and-atra-in-murine-and-human-blood-cells-at-early-stages-of-their-differentiation
#6
Sylwia Janik, Urszula Nowak, Agnieszka Łaszkiewicz, Anastasiia Satyr, Michał Majkowski, Aleksandra Marchwicka, Łukasz Śnieżewski, Klaudia Berkowska, Marian Gabryś, Małgorzata Cebrat, Ewa Marcinkowska
Vitamin D receptor (VDR) is present in multiple blood cells, and the hormonal form of vitamin D, 1,25-dihydroxyvitamin D (1,25D) is essential for the proper functioning of the immune system. The role of retinoic acid receptor α (RARα) in hematopoiesis is very important, as the fusion of RARα gene with PML gene initiates acute promyelocytic leukemia where differentiation of the myeloid lineage is blocked, followed by an uncontrolled proliferation of leukemic blasts. RARα takes part in regulation of VDR transcription, and unliganded RARα acts as a transcriptional repressor to VDR gene in acute myeloid leukemia (AML) cells...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28630305/multiple-layers-of-heterogeneity-and-subset-diversity-in-human-mait-cell-responses-to-distinct-microorganisms-and-to-innate-cytokines
#7
Joana Dias, Edwin Leeansyah, Johan K Sandberg
Mucosa-associated invariant T (MAIT) cells are a large innate-like T-cell subset in humans defined by invariant TCR Vα7.2 use and expression of CD161. MAIT cells recognize microbial riboflavin metabolites of bacterial or fungal origin presented by the monomorphic MR1 molecule. The extraordinary level of evolutionary conservation of MR1 and the limited known diversity of riboflavin metabolite antigens have suggested that MAIT cells are relatively homogeneous and uniform in responses against diverse microbes carrying the riboflavin biosynthesis pathway...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28627830/flt3-itd-mutations-in-egyptian-patients-of-acute-myeloid-leukemia-correlation-with-cytogenetic-fab-subgroups-and-prognosis
#8
Shady Adnan-Awad, Ola Gaber, Soad A Eltokhy, Dalia Mourad, Mariam Amer, Eman Z Kandeel, Ihab Eldesouky
BACKGROUND: FLT3-ITD mutations are common in AML subgroups, particularly in Acute Promyelocytic Leukemia (APL). It infers poor prognosis in AML patients; however, its prognostic value in APL is still controversial. We aimed to assess the distribution and prognostic value of FLT3-ITD mutation within AML subgroups, focusing on APL. METHODS: In NCI, Cairo University, 346 newly diagnosed AML patients were included. Morphological, immunophenotypic and cytogenetic analysis were done at presentation and fixed follow-up points with monitoring in follow up visits of patients...
May 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28619754/antitumor-effect-of-the-atypical-retinoid-st1926-in-acute-myeloid-leukemia-and-nanoparticle-formulation-prolongs-lifespan-and-reduces-tumor-burden-of-xenograft-mice
#9
Leeanna El-Houjeiri, Walid Saad, Berthe Hayar, Patrick Aouad, Nadim Tawil, Rana Abdel-Samad, Rita Hleihel, Maguy Hamie, Angelo Mancinelli, Claudio Pisano, Hiba El Hajj, Nadine Darwiche
Acute myeloid leukemia (AML) is one of the most frequent types of blood malignancies. It is a complex disorder of undifferentiated hematopoietic progenitor cells. The majority of patients generally respond to intensive therapy. Nevertheless, relapse is the major cause of death in AML, warranting the need for novel treatment strategies. Retinoids have demonstrated potent differentiation and growth regulatory effects in normal, transformed and hematopoietic progenitor cells. All-trans retinoic acid (ATRA) is the paradigm of treatment in acute promyelocytic leukemia, an AML subtype...
June 15, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28607471/gemtuzumab-ozogamicin-in-acute-myeloid-leukemia
#10
REVIEW
C D Godwin, R P Gale, R B Walter
CD33 is variably expressed on leukemia blasts in almost all patients with acute myeloid leukemia (AML) and possibly leukemia stem cells in some. Efforts to target CD33 therapeutically have focused on gemtuzumab ozogamicin (GO; Mylotarg®), an antibody-drug conjugate delivering a DNA-damaging calicheamicin derivative. GO is most effective in acute promyelocytic leukemia but induces remissions in other AML types and received accelerated approval in the US in 2000. However, because a large follow-up study showed no survival improvement and increased early deaths the drug manufacturer voluntarily withdrew the US New Drug Application in 2010...
June 13, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28599418/acute-promyelocytic-leukemia-with-a-cryptic-insertion-of-rara-into-pml-on-chromosome-15-due-to-uniparental-isodisomy-a-case-report
#11
Anna Venci, Rita Mazza, Orietta Spinelli, Luciana Di Schiena, Daniela Bettio
Acute promyelocytic leukemia is a myeloid disorder that is characterized by the specific t(15;17) variant in ~98% of cases. The typical hypergranular and microgranular or hypogranular types exist, and are frequently associated with disseminated intravascular coagulopathy. Rare cases of promyelocytic leukemia-retinoic acid receptor α (PML-RARA) fusion without the reciprocal RARA-PML have been reported in cytogenetically normal samples. Conversely, fluorescence in situ hybridization (FISH) analysis has revealed a cryptic insertion of the RARA gene into the PML gene on chromosome 15...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28599190/sharing-post-aml-consolidation-supportive-therapy-with-local-centers-reduces-patient-travel-burden-without-compromising-outcomes
#12
Samantha A Hershenfeld, Kimberly Maki, Lana Rothfels, Cindy S Murray, Shannon Nixon, Aaron D Schimmer, Mary C Doherty
Acute myeloid leukemia (AML) is frequently treated with induction and consolidation chemotherapy. Consolidation chemotherapy can be delivered on an ambulatory basis, requiring some patients to travel long distances for treatment at specialized centers. We developed a shared care model where patients receive consolidation chemotherapy at a quaternary center, but post-consolidation supportive care at local hospitals. To evaluate the impact of our model on patient travel and outcomes we conducted a retrospective analysis of AML and acute promyelocytic leukemia patients receiving consolidation over four years at our quaternary center...
June 1, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28598536/characteristics-and-outcome-in-patients-with-central-nervous-system-involvement-treated-in-european-pediatric-acute-myeloid-leukemia-study-groups
#13
Ursula Creutzig, Michael N Dworzak, Martin Zimmermann, Dirk Reinhardt, Lucie Sramkova, Jan Pierre Bourquin, Henrik Hasle, Jonas Abrahamsson, Gertjan Kaspers, Mary M van den Heuvel, Ardine M J Reedijk, Barbara De Moerloose, Franco Locatelli, Riccardo Masetti
BACKGROUND: There is no consensus on the treatment for pediatric patients with acute myeloid leukemia and initial central nervous system (CNS) involvement. METHODS: To evaluate different CNS-directed treatment options (intrathecal [IT] therapy, CNS irradiation, hematopoietic stem cell transplantation [HSCT]), 261 patients (excluding acute promyelocytic leukemia) with initial CNS involvement treated in trials with similar intensive chemotherapy by four cooperative European study groups (1998-2013) were studied and compared with CNS-negative patients from the Berlin-Frankfurt-Münster group...
June 9, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28598409/two-new-%C3%AE-dihydroagarofuran-sesquiterpenes-from-celastrus-orbiculatus-thunb-and-their-anti-proliferative-activity
#14
Jingjing Zhou, Na Han, Guanghui Lv, Lina Jia, Zhihui Liu, Jun Yin
Two new β-dihydroagarofuran-type sesquiterpenes (1-2) were isolated and identified from the fruit of Celastrus orbiculatus Thunb, together with seventeen known compounds (3-19). The structures of the isolated new compounds were elucidated based on extensive spectroscopic analyses. The cytotoxic activities of the 19 sesquiterpenes on three cell lines, human acute promyelocytic leukemia HL-60, human leukemic K562, and human colon cancer HCT-116 cells, were evaluated in vitro. Compound 4 exhibited potent cytotoxic activity against HL-60, K562, and HCT116 cell lines with IC50 values of 3...
June 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28597167/predictors-of-thrombohemorrhagic-early-death-in-children-and-adolescents-with-t-15-17-positive-acute-promyelocytic-leukemia-treated-with-atra-and-chemotherapy
#15
Oussama Abla, Raul C Ribeiro, Anna Maria Testi, Pau Montesinos, Ursula Creutzig, Lillian Sung, Giancarlo Di Giuseppe, Derek Stephens, James H Feusner, Bayard L Powell, Henrik Hasle, Gertjan J L Kaspers, Luciano Dalla-Pozza, Alvaro Lassaletta, Martin S Tallman, Franco Locatelli, Dirk Reinhardt, Francesco Lo-Coco, Johann Hitzler, Miguel A Sanz
Clinical trials on childhood acute promyelocytic leukemia (APL) report early death (ED) rates of 3-8%, but predictors of thrombohemorrhagic (TH)-ED are not well understood. In a retrospective study, we aimed to determine the incidence and predictors of TH-ED in childhood APL. Data were analyzed from children and adolescents with t(15;17)-positive APL (n = 683) who started treatment with all-trans retinoic acid (ATRA) and chemotherapy in different international studies. Demographic data; initial white blood cell (WBC), peripheral blood (PB) blast, and platelet counts; hemoglobin value; coagulation parameters; morphologic variant (M3 or M3v); and induction details were analyzed...
June 8, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28593927/laboratory-characterization-of-leukemic-cell-procoagulants
#16
Renáta Hudák, Ildikó Beke Debreceni, Ivett Deák, Gabriella Gál Szabó, Zsuzsanna Hevessy, Péter Antal-Szalmás, Bjarne Osterud, János Kappelmayer
BACKGROUND: In acute myeloid leukemias, there is an increased chance to develop thrombotic disorders. We hypothesized that in addition to leukemic promyelocytes, monocytic leukemia cells may also have a higher procoagulant activity. METHODS: Fibrin formation was assessed by a one-stage clotting assay using a magnetic coagulometer. The thrombin generation test (TGT) of magnetically isolated normal human monocytes, intact leukemic cells and their isolated microparticles was performed by a fluorimetric assay...
May 5, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28587418/synergistic-inhibition-of-leukemia-wehi-3-cell-growth-by-arsenic-trioxide-and-hedyotis-diffusa-willd-extract-in-vitro-and-in-vivo
#17
Yu-Jui Kuo, Yan-Jin Liu, Tzong-Der Way, Su-Yin Chiang, Jaung-Geng Lin, Jing-Gung Chung
Arsenic trioxide (ATO) is clinically used to treat acute promyelocytic leukemia (APL); however, the therapeutic dose of ATO may prompt critical cardiac side effects. Combination therapy may be used to improve the therapeutic efficiency. To evaluate this possibility, the present study determined the combined effects of Hedyotis diffusa Willd (HDW) extract and ATO in leukemic WEHI-3 cells. The results demonstrated that co-treatment of HDW with ATO resulted in a synergistic augmentation of cytotoxicity in cells at the concentration tested...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28584252/long-term-outcome-of-older-patients-with-newly-diagnosed-de-novo-acute-promyelocytic-leukemia-treated-with-atra-plus-anthracycline-based-therapy
#18
D Martínez-Cuadrón, P Montesinos, E Vellenga, T Bernal, O Salamero, A Holowiecka, S Brunet, C Gil, C Benavente, J-M Ribera, M Pérez-Encinas, J De la Serna, J Esteve, V Rubio, J González-Campos, L Escoda, M E Amutio, M Arnan, J Arias, S Negri, B Lowënberg, M A Sanz
Treatment outcome in older patients with acute promyelocytic leukemia (APL) lower compared with younger patients, mainly due to a higher induction death rate and post-remission non-relapse-mortality (NRM). This prompted us to design a risk- and age-adapted protocol (PETHEMA/HOVON LPA2005), with dose-reduction of consolidation chemotherapy. Patients aged ⩾60 years reported to the PETHEMA registry and treated with ATRA plus anthracycline-based regimens according to three consecutive PETHEMA trials were included...
June 6, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28569789/knockdown-of-mir-128a-induces-lin28a-expression-and-reverts-myeloid-differentiation-blockage-in-acute-myeloid-leukemia
#19
Luciana De Luca, Stefania Trino, Ilaria Laurenzana, Daniela Tagliaferri, Geppino Falco, Vitina Grieco, Gabriella Bianchino, Filomena Nozza, Valentina Campia, Francesca D'Alessio, Francesco La Rocca, Antonella Caivano, Oreste Villani, Daniela Cilloni, Pellegrino Musto, Luigi Del Vecchio
Lin28A is a highly conserved RNA-binding protein that concurs to control the balance between stemness and differentiation in several tissue lineages. Here, we report the role of miR-128a/Lin28A axis in blocking cell differentiation in acute myeloid leukemia (AML), a genetically heterogeneous disease characterized by abnormally controlled proliferation of myeloid progenitor cells accompanied by partial or total inability to undergo terminal differentiation. First, we found Lin28A underexpressed in blast cells from AML patients and AML cell lines as compared with CD34+ normal precursors...
June 1, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28565741/-analysis-of-clinical-efficacy-of-recombinant-activated-factor-%C3%A2-on-bleeding-in-patients-with-hematologic-disorders
#20
W Liu, F Xue, X F Liu, E L Jiang, D L Yang, K Q Liu, Z J Xiao, F K Zhang, S Z Feng, M Z Han, L Zhang, R C Yang
Objective: To investigate the treatment efficacy of recombinant activated factor Ⅶ (rFⅦa) for bleeding among patients with hematologic disorders. Methods: A total of 38 times of bleeding in 31 patients with hematological disease treated with rFⅦa were analyzed retrospectively. Results: The clinical effective rate of rFⅦa for bleeding management in acquired hemophilia A (AHA) patients/hemophilia patients with inhibitor, acute promyelocytic leukemia (APL) patients and patients with non-APL leukemia was 90% (9/10) , 71...
May 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
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