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Leukemia stem cells

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https://www.readbyqxmd.com/read/29146707/outcomes-after-allogeneic-hematopoietic-stem-cell-transplantation-in-patients-with-acute-myeloid-leukemia-harboring-t-7-11-p15-p15
#1
Kaito Harada, Noriko Doki, Jun Aoki, Jinichi Mori, Shinichiro Machida, Masayoshi Masuko, Naoyuki Uchida, Yuho Najima, Takahiro Fukuda, Heiwa Kanamori, Hiroyasu Ogawa, Shuichi Ota, Kazuei Ogawa, Satoshi Takahashi, Masanobu Kasai, Akio Maeda, Koji Nagafuji, Toshiro Kawakita, Tatsuo Ichinohe, Yoshiko Atsuta
No abstract text is available yet for this article.
November 16, 2017: Haematologica
https://www.readbyqxmd.com/read/29144828/prognostic-impact-of-cd200-and-cd56-expression-in-pediatric-b-cell-acute-lymphoblastic-leukemia-patients
#2
Salah Aref, Emad Azmy, Kadry El-Bakry, Lobna Ibrahim, Sherin Abdel Aziz
This study aimed to determine the prognostic impact of CD200 and CD56 expression in pediatric B cell acute lymphoblastic leukemia (B-ALL) patients, both of which have been implicated in immune tolerance and previously suggested as independent risk factors. CD200 has a central role in immune tolerance that protects stem cells and other critical tissues from immune damage. The expression of CD200/CD56 in leukemic blasts were assessed in leukemic blasts before chemotherapy in 43 bone marrow (BM) and/or peripheral blood (PB) samples by flow cytometry...
November 16, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/29143804/telomeres-and-telomerase-in-hematopoietic-dysfunction-prognostic-implications-and-pharmacological-interventions
#3
REVIEW
Theresa Vasko, Andrea Kaifie, Matthias B Stope, Thomas Kraus, Patrick Ziegler
Leukocyte telomere length (TL) has been suggested as a marker of biological age in healthy individuals, but can also reflect inherited and acquired hematopoietic dysfunctions or indicate an increased turnover of the hematopoietic stem and progenitor cell compartment. In addition, TL is able to predict the response rate of tyrosine kinase inhibitor therapy in chronic myeloid leukemia (CML), indicates clinical outcomes in chronic lymphocytic leukemia (CLL), and can be used as screening tool for genetic sequencing of selected genes in patients with inherited bone marrow failure syndromes (BMFS)...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29143282/hypomethylating-agents-for-treatment-and-prevention-of-relapse-after-allogeneic-blood-stem-cell-transplantation
#4
REVIEW
Thomas Schroeder, Christina Rautenberg, Rainer Haas, Ulrich Germing, Guido Kobbe
Despite the curative potential of allogeneic stem cell transplantation (allo-SCT) in patients with acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS), many patients will relapse. Until recently therapeutic options mainly consisted of palliative care, chemotherapy, donor lymphocyte infusions and second transplantation in selected cases. Still many patients either do not tolerate intensive therapies or do not achieve durable remissions and will finally succumb. Given this unmet medical need the hypomethylating agents (HMA), Azacitidine (Aza) and Decitabine (DAC) have been tested as salvage therapy in patients with myeloid malignancies relapsing after allo-SCT...
November 15, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/29142066/characterization-of-sgn-cd123a-a-potent-cd123-directed-antibody-drug-conjugate-for-acute-myeloid-leukemia
#5
Fu Li, May Kung Sutherland, Changpu Yu, Roland B Walter, Lori Westendorf, John Valliere-Douglass, Lucy Pan, Ashley Cronkite, Django Sussman, Kerry Klussman, Michelle Ulrich, Martha E Anderson, Ivan J Stone, Weiping Zeng, Mechthild Jonas, Timothy S Lewis, Maitrayee Goswami, Sa A Wang, Peter D Senter, Che-Leung Law, Eric J Feldman, Dennis R Benjamin
Treatment choices for acute myeloid leukemia (AML) patients resistant to conventional chemotherapies are limited and novel therapeutic agents are needed. Interleukin-3 receptor alpha (IL-3Rα, or CD123) is expressed on the majority of AML blasts and there is evidence that its expression is increased on leukemic relative to normal hematopoietic stem cells, which makes it an attractive target for antibody-based therapy. Here we report the generation and preclinical characterization of SGN-CD123A, an antibody-drug conjugate utilizing the pyrrolobenzodiazepine dimer (PBD) linker and a humanized CD123 antibody with engineered cysteines for site-specific conjugation...
November 15, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29141316/-a-clinical-analysis-of-micafungin-treatment-of-pulmonary-invasive-fungal-infection-in-pediatric-patients-with-acute-leukemia-or-post-hematopoietic-stem-cells-transplantation
#6
K Huang, K Y Qiu, L L Deng, J P Fang, Y Li, H X Guo, D H Zhou
Objective: To investigate the efficacy and safety of micafungin (MCF) for pulmonary invasive fungal disease (PIFD) in pediatric patients with acute leukemia or post hematopoietic stem cells transplantation. Method: Twenty-five neutropenic PIFD children with acute leukemia or post hematopoietic stem cells transplantation in Sun Yat-sen Memorial Hospital of Sun Yat-sen University were selected from January 2012 to June 2015, including 12 males and 13 females, age range 2-15 (average 6.2±2.0) years. There were 12 cases of acute leukemia (AL) after chemotherapy, 4 cases of acute leukemia (AL) after allogeneic hematopoietic stem cell transplantation (allo-HSCT) and 9 cases of β-thalassemia major after allo-HSCT...
November 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29139097/correction-to-leukemia-inhibitory-factor-increases-survival-of-pluripotent-stem-cell-derived-cardiomyocytes
#7
Carolina Blüguermann, Leonardo Romorini, Denis Evseenko, Ximena Garate, Gabriel Neiman, Gustavo Emilio Sevlever, María Elida Scassa, Santiago Gabriel Miriuka
Please note that Carolina Blüguermann's surname was misspelled (as Blugüermann) in this article as originally published.
November 14, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29138222/decitabine-enhances-targeting-of-aml-cells-by-cd34-progenitor-derived-nk-cells-in-nod-scid-il2rg-null-mice
#8
Jeannette Cany, Mieke W H Roeven, Janneke S Hoogstad-van Evert, Willemijn Hobo, Frans Maas, Rosalia Franco Fernandez, Nicole M A Blijlevens, Walter J van der Velden, Gerwin Huls, Joop H Jansen, Nicolaas P M Schaap, Harry Dolstra
Combining NK cell adoptive transfer with hypomethylating agents (HMA) is an attractive therapeutic approach for patients with acute myeloid leukemia (AML). However, data regarding the impact of HMA on NK cell functionality are mostly derived from in vitro studies with high non-clinical relevant drug concentrations. Here, we report a comparative study of azacitidine and decitabine in combination with allogeneic NK cells generated from CD34(+) hematopoietic stem and progenitor cells (HSPC-NK cells) in in vitro and in vivo AML models...
November 14, 2017: Blood
https://www.readbyqxmd.com/read/29138221/immature-cml-cells-implement-a-bmp-autocrine-loop-to-escape-tki-treatment
#9
Elodie Grockowiak, Bastien Laperrousaz, Sandrine Jeanpierre, Thibault Voeltzel, Boris Guyot, Stéphanie Gobert, Franck E Nicolini, Véronique Maguer-Satta
The BCR-ABL specific Tyrosine Kinase Inhibitors (TKI) changed the outcome of Chronic Myeloid Leukemia (CML), turning a life-threatening disease into a chronic illness. However, TKI are not yet curative, since most patients retain leukemic stem cells (LSC) and their progenitors in bone marrow and relapse following treatment cessation. At diagnosis, deregulations of the Bone Morphogenetic Proteins (BMP) pathway are involved in LSC and progenitors expansion. Here, we report that BMP pathway alterations persist in TKI-resistant patients...
November 14, 2017: Blood
https://www.readbyqxmd.com/read/29137845/enumeration-of-bone-marrow-plasmacytoid-dendritic-cells-by-multiparameter-flow-cytometry-as-a-prognostic-marker-following-allogeneic-hematopoietic-stem-cell-transplantation
#10
Ruijun Jeanna Su, Ralph Green, Mingyi Chen
Plasmacytoid dendritic cells (pDCs) promote tolerance in solid organ transplants and hematopoietic stem cell transplantation (HSCT). pDCs originate from CD34(+) hematopoietic progenitors. Following allogeneic hematopoietic stem cell transplant (allo-HSCT), pDC reconstitution in the BM and PB gradually attain levels similar to those in healthy individuals. We have investigated the recovery of pDC following allo-HSCT as a means to predict successful marrow engraftment. We retrospectively studied immune reconstitution of pDC in the BM of 48 patients following allo-HSCT for initial diagnoses of leukemia or other malignancies...
October 31, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/29137597/reduction-of-pluripotent-gene-expression-in-murine-embryonic-stem-cells-exposed-to-mechanical-loading-or-cyclo-rgd-peptide
#11
Olesja Hazenbiller, Neil A Duncan, Roman J Krawetz
BACKGROUND: Self-renewal and differentiation of embryonic stem cells (ESCs) is directed by biological and/or physical cues that regulate multiple signaling cascades. We have previously shown that mESCs seeded in a type I collagen matrix demonstrate a loss of pluripotent marker expression and differentiate towards an osteogenic lineage. In this study, we examined if this effect was mediated in part through Arginylglycylaspartic acid (RGD) dependent integrin activity and/or mechano-transduction...
November 14, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/29137234/the-af4-mll-fusion-transiently-augments-multilineage-hematopoietic-engraftment-but-is-not-sufficient-to-initiate-leukemia-in-cord-blood-cd34-cells
#12
Cristina Prieto, Rolf Marschalek, Alessa Kühn, Adelheid Bursen, Clara Bueno, Pablo Menéndez
The translocation t(4;11)(q21;q23) is the hallmark genetic abnormality associated with infant pro-B acute lymphoblastic leukemia (B-ALL) and has the highest frequency of rearrangement in Mixed-lineage leukemia (MLL) leukemias. Unlike other MLL translocations, MLL-AF4-induced proB-ALL is exceptionally difficult to model in mice/humans. Previous work has investigated the relevance of the reciprocal translocation fusion protein AF4-MLL for t(4;11) leukemia, finding that AF4-MLL is capable of inducing proB-ALL without requirement for MLL-AF4 when expressed in murine hematopoietic stem/progenitor cells (HSPCs)...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137227/re-balance-of-memory-t-cell-subsets-in-peripheral-blood-from-patients-with-cml-after-tki-treatment
#13
Danlin Yao, Ling Xu, Jiaxiong Tan, Yikai Zhang, Shuai Lu, Mingde Li, Sichun Lu, Lijian Yang, Shaohua Chen, Jie Chen, Jing Lai, Yuhong Lu, Xiuli Wu, Xianfeng Zha, Yangqiu Li
T cell immune surveillance is considered an important host protection process for inhibiting carcinogenesis. The full capacity of T cell immune surveillance is dependent on T cell homeostasis, particularly for central memory T (TCM) cells and stem cell memory T (TSCM) cells. In this study, distribution of T cell subsets in peripheral blood from 12 patients with chronic myeloid leukemia (CML) and 12 cases with CML in complete remission (CR) was analyzed using a multicolor flow cytometer, and 16 samples from healthy individuals (HIs) served as control...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137216/immune-ddr-crosstalk-in-pre-leukemia-stem-cells
#14
EDITORIAL
Limei Wu, Allison Cole, Wei Du
No abstract text is available yet for this article.
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29132903/progressive-multifocal-leukoencephalopathy-in-patients-receiving-rituximab-and-cyclophosphamide-after-haplo-identical-t-cell-replete-transplantation-and-review-of-the-literature
#15
REVIEW
R Salem, R Massoud, S S Kanj, M Hamdan, R Salman, A Bazarbachi, J El-Cheikh
John Cunningham virus (JCV) reactivation, occurring mainly in immunocompromised patients, leads to progressive multifocal leukoencephalopathy, an uncommon but lethal disease. JCV reactivation after T-cell replete haploidentical stem cell transplantation, in the pre-cyclophosphamide era, is poorly represented in the literature. We therefore describe two cases of acute myeloid leukemia who developed JCV reactivation after receiving cyclophosphamide and rituximab post haploidentical stem cell transplantation, and review the literature, aiming to a better understanding of the disease course and its risk factors...
November 10, 2017: Current Research in Translational Medicine
https://www.readbyqxmd.com/read/29132473/-progress-in-clinical-studies-of-chimeric-antigen-receptor-engineered-t-cells-for-treatment-of-childhood-cancer
#16
Ya-Ru Ni, Xiao-Jun Xu, Yong-Min Tang
Nowadays, the 5-year survival rate of childhood cancer patients can be more than 80%, but some patients with relapse and refractory cancers have shown no good response to traditional strategies. Chimeric antigen receptor engineered T (CAR-T) cell therapy is promising for these patients. CAR-T cells recognize the tumor-associated antigens in a non-major histocompatibility complex-restricted manner, so their anti-tumor ability is enhanced. There are four generations of CAR-T cells now. The complete remission rate of pediatric patients with relapse and refractory acute lymphoblastic leukemia can be as high as 90% when treated with CD19-targeting CAR-T cells...
November 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29129488/dna-hypomethylating-agents-as-epigenetic-therapy-before-and-after-allogeneic-hematopoietic-stem-cell-transplantation-in-myelodysplastic-syndromes-and-juvenile-myelomonocytic-leukemia
#17
REVIEW
Christian Flotho, Sebastian Sommer, Michael Lübbert
Myelodysplastic syndrome (MDS) is a clonal bone marrow disorder, typically of older adults, which is characterized by ineffective hematopoiesis, peripheral blood cytopenias and risk of progression to acute myeloid leukemia. Juvenile myelomonocytic leukemia (JMML) is an aggressive myeloproliferative neoplasm occurring in young children. The common denominator of these malignant myeloid disorders is the limited benefit of conventional chemotherapy and a particular responsiveness to epigenetic therapy with the DNA-hypomethylating agents 5-azacytidine (azacitidine) or decitabine...
November 9, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/29128601/isolation-modification-and-cytotoxic-evaluation-of-stilbenoids-from-acanthopanax-leucorrhizus
#18
Hao-Bin Hu, Hai-Peng Liang, Hai-Ming Li, Ru-Nan Yuan, Jiao Sun, La-La Zhang, Ming-Hu Han, Yun Wu
Twenty natural stilbenoids (1-20), including seven new stilbenoids (2, 4-7, 19, 20) and thirteen known stilbenoids (1, 3, 8-18), were isolated from the stem barks of Acanthopanax leucorrhizus, and six modified stilbenoid derivatives (1a, 2a, 4a, 4b, 7a and 17a) were obtained via methylation, demethylation and isopentenylation of the corresponding isolates (1, 2, 4, 7 and 17). These stilbenoids were structurally characterized by comprehensive analysis of their spectroscopic data and comparison with literature information, and evaluated for their cytotoxic activities against three human tumor cell lines (leukemia HL-60, hepatoma SMMC-7721 and breast carcinoma MCF-7) in vitro by MTT assay...
November 8, 2017: Fitoterapia
https://www.readbyqxmd.com/read/29128069/how-do-we-use-multicolor-flow-cytometry-to-detect-minimal-residual-disease-in-acute-myeloid-leukemia
#19
REVIEW
Jie Xu, Jeffrey L Jorgensen, Sa A Wang
Multicolor flow cytometry (MFC), combined with molecular and cytogenetic studies, is the most common method for detecting minimal residual disease (MRD) in acute myeloid leukemia (AML). Studies have shown that a positive MFC MRD study after induction and/or consolidation, or before allogeneic hematopoietic stem cell transplantation, correlates with risk of relapse and inferior survival. However, there is little information on technical and analytical details. This article shares the authors' experience using MFC for AML MRD detection, including antibody panel design, data analysis, and interpretation...
December 2017: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/29127762/anti-invasive-and-antiproliferative-effects-of-pleurotus-ostreatus-extract-on-acute-leukemia-cell-lines
#20
Alireza Ebrahimi, Amir Atashi, Masoud Soleimani, Maedeh Mashhadikhan, Ahmadreza Barahimi, Amirhossein Maghari
BACKGROUND: Currently, mushrooms have been used in traditional and folk medicines for their therapeutic activities, such as antibiotic, antitumor, anti-inflammatory, anticancer, antileukemic and immunomodulatory actions. This investigation evaluates the anti-invasive, antiproliferative and cytotoxic effects of Pleurotus ostreatus (Pleurotaceae) on leukemia cell lines. METHODS: The proliferation of KG-1 cells was measured by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay after treatment with gradient dilutions of P...
November 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
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