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Hematopoietic stem cells

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https://www.readbyqxmd.com/read/28646637/ts-gene-polymorphisms-correlate-with-susceptibility-to-acute-lymphocytic-leukemia-in-children
#1
Runyin Zou, Xiangling He, Yanpeng Wu, Xin Tian, Yalan You, Mincui Zheng, Wanli Li, Hui Zou, Hua Liu, Xiujuan Zhu, Chengguang Zhu
BACKGROUND Acute lymphocytic leukemia (ALL) in children is a clonal disease of bone marrow hematopoietic stem cells. This study aimed to explore the associations between MTHFR or TS genetic polymorphisms and susceptibility to acute lymphocytic leukemia (ALL) in children. MATERIAL AND METHODS This case-control study included 79 ALL patients (case group) and 102 non-ALL patients (control group). Post-PCR genomic DNA sequencing revealed MTHFR C677T and MTHFR A1298C genotypes and TS polymorphisms. The χ² test was used to compare differences in MTHFR and TS polymorphisms (including genotypic and allelic distributions) between groups...
June 24, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28646023/amlexanox-downregulates-s100a6-to-sensitize-kmt2a-aff1-positive-acute-lymphoblastic-leukemia-to-tnf-%C3%AE-treatment
#2
Hayato Tamai, Hiroki Yamaguchi, Koichi Miyake, Miyuki Takatori, Tomoaki Kitano, Satoshi Yamanaka, Syunsuke Yui, Keiko Fukunaga, Kazutaka Nakayama, Koiti Inokuchi
Acute lymphoblastic leukemias (ALL) positive for KMT2A/AFF1 (MLL/AF4) translocation, which constitute 60% of all infant ALL cases, have a poor prognosis even after allogeneic hematopoietic stem cell transplantation (allo-HSCT). This poor prognosis is due to one of two factors, either resistance to TNF-α which mediates a graft-versus-leukemia (GVL) response after allo-HSCT, or immune resistance due to upregulated expression of the immune escape factor S100A6. Here we report an immune stimulatory effect against KMT2A/AFF1-positive ALL cells by treatment with the anti-allergy drug amlexanox, which we found to inhibit S100A6 expression in the presence of TNF-α...
June 23, 2017: Cancer Research
https://www.readbyqxmd.com/read/28645734/the-influence-of-temperature-treatment-before-cryopreservation-on-the-viability-and-potency-of-cryopreserved-and-thawed-cd34-and-cd45-cord-blood-cells
#3
Svenja Schwandt, Stefanie Liedtke, Gesine Kogler
BACKGROUND: Hematopoietic stem cell (HSC) viability and potency is crucial for qualified cord blood (CB) transplants. This study analyzes time and temperature condition before cryopreservation for the viability of CD34(+)/CD45(+) cells after cryopreservation. METHODS: Cell viabilities were determined by antibody co-staining with 7-aminoactinomycin D detecting necrotic cells, and subsequent flow cytometric analysis. Additionally, Annexin V staining for determination of apoptotic cells and colony-forming unit (CFU) assays for testing functional potency of HSCs were performed...
June 20, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28645468/aldhs-in-normal-and-malignant-hematopoietic-cells-potential-new-avenues-for-treatment-of-aml-and-other-blood-cancers
#4
Maura Gasparetto, Clayton A Smith
Multiple studies have demonstrated that ALDH1A1 is elevated in hematopoietic stem cells (HSCs). As a means to better characterize such cells, we previously developed the fluorescent ALDH1A1 substrate Aldefluor to facilitate HSC identification and isolation. This has proven useful for counting and isolating HSCs from human bone marrow, peripheral blood and cord blood as well as stem cells in other tissues and organisms. Given the high level expression of ALDH1A1, we explored its biology and that of other ALDHs in HSCs and found that ALDH1A1 and ALDH3A1 were important in metabolizing reactive aldehydes (RAlds) and reactive oxygen species (ROS)...
June 20, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28644773/mobilized-peripheral-blood-stem-cells-versus-unstimulated-bone-marrow-as-a-graft-source-for-t-cell-replete-haploidentical-donor-transplantation-using-post-transplant-cyclophosphamide
#5
Asad Bashey, Mei-Jie Zhang, Shannon R McCurdy, Andrew St Martin, Trevor Argall, Claudio Anasetti, Stefan O Ciurea, Omotayo Fasan, Sameh Gaballa, Mehdi Hamadani, Pashna Munshi, Monzr M Al Malki, Ryotaro Nakamura, Paul V O'Donnell, Miguel-Angel Perales, Kavita Raj, Rizwan Romee, Scott Rowley, Vanderson Rocha, Rachel B Salit, Melhem Solh, Robert J Soiffer, Ephraim Joseph Fuchs, Mary Eapen
Purpose T-cell-replete HLA-haploidentical donor hematopoietic transplantation using post-transplant cyclophosphamide was originally described using bone marrow (BM). With increasing use of mobilized peripheral blood (PB), we compared transplant outcomes after PB and BM transplants. Patients and Methods A total of 681 patients with hematologic malignancy who underwent transplantation in the United States between 2009 and 2014 received BM (n = 481) or PB (n = 190) grafts. Cox regression models were built to examine differences in transplant outcomes by graft type, adjusting for patient, disease, and transplant characteristics...
June 23, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28644706/advance-care-planning-and-palliative-care-integration-for-patients-undergoing-hematopoietic-stem-cell-transplantation
#6
Winnie S Wang, Joseph D Ma, Sandahl H Nelson, Carolyn Revta, Gary T Buckholz, Carolyn M Mulroney, Eric J Roeland
PURPOSE: Advance care planning (ACP) in hematopoietic stem-cell transplantation (HSCT) is challenging, given the potential for cure despite increased morbidity and mortality risk.The aim of this study was to evaluate ACP and palliative care (PC) integration for patients who underwent HSCT. METHODS: A retrospective analysis was conducted and data were extracted from electronic medical records of patients who underwent HSCT between January 2011 and December 2015. Patients who received more than one transplant and who were younger than 18 years of age were excluded...
June 23, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28643468/eltrombopag-use-in-a-patient-with-wiskott-aldrich-syndrome
#7
Maria Gabelli, Antonio Marzollo, Lucia Dora Notarangelo, Giuseppe Basso, Maria Caterina Putti
Wiskott-Aldrich syndrome (WAS) is an inherited X-linked disorder characterized by microthrombocytopenia, immunodeficiency, and eczema. Hematopoietic stem cell transplantation (HSCT) is the treatment of choice. Eltrombopag, a thrombopoietin receptor agonist, may be useful to prevent bleeding while awaiting HSCT. We present a case of a male with WAS, profound thrombocytopenia, and bleeding diathesis successfully managed with eltrombopag before HSCT. Eltrombopag was given for 32 weeks obtaining a stable platelet count without any platelet transfusion...
June 23, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28643044/pd-1-signaling-and-inhibition-in-aml-and-mds
#8
REVIEW
Faysal Haroun, Sade A Solola, Samah Nassereddine, Imad Tabbara
Acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS) are clinically and molecularly heterogeneous clonal myeloid disorders with a poor prognosis especially in the relapsed refractory setting and in patients above the age of 60. While allogeneic hematopoietic stem cell transplantation (ASCT) is a potentially curative approach, high relapse, morbidity, and mortality rates necessitate the development of alternative therapies. Immune checkpoint inhibitors unmask tumoral immune tolerance and have demonstrated efficacy in the treatment of chemotherapy-resistant hematologic and solid malignancies...
June 22, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28643018/heterogeneity-of-gata2-related-myeloid-neoplasms
#9
REVIEW
Shinsuke Hirabayashi, Marcin W Wlodarski, Emilia Kozyra, Charlotte M Niemeyer
The GATA2 gene codes for a master hematopoietic transcription factor that is essential for the proliferation and maintenance of hematopoietic stem and progenitor cells. Heterozygous germline mutations in GATA2 have been initially associated with several clinical entities that are now collectively defined as GATA2 deficiency. Despite pleiotropic clinical manifestations, the high propensity for the development of myelodysplastic syndromes (MDS) constitutes the most common clinical denominator of this major MDS predisposition syndrome...
June 22, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28642593/transforming-growth-factor-%C3%AE-1-regulates-the-nascent-hematopoietic-stem-cell-niche-by-promoting-gluconeogenesis
#10
C-Y Zhang, H-M Yin, H Wang, D Su, Y Xia, L-F Yan, B Fang, W Liu, Y-M Wang, A-H Gu, Y Zhou
The understanding of hematopoietic stem cell (HSC) emergence is important to generate HSCs from pluripotent precursors. However, integrated signaling network that regulates the niche of nascent HSCs remains unclear. Herein, we uncovered a novel role of TGF-β1 in the metabolic niche of HSC emergence using the tgf-β1b(-/-) zebrafish. Our findings first showed that Tgf-β1 transcripts were enriched in the nascent HSCs. Loss of tgf-β1b caused a decrease of nascent HSCs within the aorta-gonad-mesonephros. Moreover, tgf-β1b(+) cells were runx1(+) HSCs and underwent an endothelial-to-hematopoietic-transition process...
June 23, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28642213/development-of-a-web-based-intervention-for-addressing-distress-in-caregivers-of-patients-receiving-stem-cell-transplants-formative-evaluation-with-stakeholder-interviews-and-focus-groups
#11
Nicole Amoyal Pensak, Tanisha Joshi, Teresa Simoneau, Kristin Kilbourn, Alaina Carr, Jean Kutner, Mark L Laudenslager
BACKGROUND: Caregivers of cancer patients experience significant burden and distress including depression and anxiety. We previously demonstrated the efficacy of an eight session, in-person, one-on-one stress management intervention to reduce distress in caregivers of patients receiving allogeneic hematopoietic stem cell transplants (allo-HSCT). OBJECTIVE: The objective of this study was to adapt and enhance the in-person caregiver stress management intervention to a mobilized website (eg, tablet, smartphone, or computer-based) for self-delivery in order to enhance dissemination to caregiver populations most in need...
June 22, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28642120/transfusion-challenges-in-hematology-oncology-and-hematopoietic-stem-cell-transplant-literature-review-and-local-experience
#12
REVIEW
Mohamed Elemary, Jerard Seghatchian, Julie Stakiw, Mark Bosch, Waleed Sabry, Hadi Goubran
Transfusion medicine plays a vital role in the supportive care of patients receiving therapy for hematology, oncology and hematopoietic stem cell transplants (HSCT). With advances in therapy with more intensive chemotherapy or radiotherapy, patients usually develop cytopenias and need frequent transfusion support with packed red blood cells, granulocyte transfusion or platelets to support them until they recover from the effect of therapy. HSCT poses unique challenges for transfusion medicine, since transplant recipients may require substantial transfusion support due to cytopenias associated with toxic medications, decreased marrow reserve, infection or their malignancy...
June 3, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28642072/recombinant-human-thrombopoietin-promotes-platelet-engraftment-and-improves-prognosis-of-patients-with-myelodysplastic-syndromes-and-aplastic-anemia-after-allogeneic-hematopoietic-stem-cell-transplantation
#13
Hong Wang, Man Huang, Ying Zhao, Jia-Qian Qi, Chun Chen, Ya-Qiong Tang, Hui-Ying Qiu, Cheng-Cheng Fu, Xiao-Wen Tang, De-Pei Wu, Chang-Geng Ruan, Yue Han
Poor platelet graft function (PPGF) is a significant complication after allogeneic hematopoietic stem cell transplantation (allo-HSCT). However, no optimal treatment has been recommended. This study investigated aspects of platelet recovery after allo-HSCT, including prognostic value and the effect of recombinant human thrombopoietin (rhTPO). We retrospectively analyzed 275 patients who received allo-HSCT in our center. Of them, 135 (49.1%) patients had good platelet graft function (GPGF) and 140 (50.9%) had PPGF...
June 19, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28641662/-effect-of-pdk1-on-neutrophil-differentiation
#14
Wei-Li Wang, Le Wang, Tian-Yuan Hu, Cong Li, Wei-Ping Yuan
OBJECTIVE: To knock out PDK1 by using Vav-Cre and observe the effects of PDK1 knock out on the ratio, number and differentiation of neutrophil. METHODS: The PDK1 expression level of Vav-Cre;PDK1(lox/lox) mouse in the bone marrow cells was analyzed by RT-PCR. The effect of PDK1 on hematopoietic progenitor was observed by CFU-C assay, and the effect of PDK1 on the ratio and number of neutrophil was detected by flow cytometric analysis. RESULTS: The RNA expression level of bone marrow cells of Vav-Cre;PDK1(lox/lox) mouse was dramatically lower than that of the control mouse...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641661/-clinical-and-pathologic-features-of-myeloid-sarcoma
#15
Ya-Jun Jiang, Hong-Xia Wang, Wan-Chuan Zhuang, Hao Chen, Chang Zhang, Xiu-Mei Li, Gui-Hua Zhu, Yao He
OBJECTIVE: To explore the clinicopathologic features, differential diagnosis and therapy of myeloid sarcoma. METHODS: The clinical data including clinical manifestations, laboratorial tests, histopathologicical examination, immunohistochemistry and clinical prognosis of 10 patients with myeloid sarcoma were analyzed retrospectively. Among 10 patients, 5 male and 5 female, aged 23 to 71 years old (median = 36 years). RESULTS: 2 cases of myeloid sarcoma were secondary from chronic myeloid leukemia, and 1 cases of myeloid sarcoma occurred after the allogeneic hematopoietic stem cell transplantation due to acute myeloid leukemia, and the others lacked the anamnesis of malignancies...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641653/-risk-factors-and-therapeutic-outcome-of-intestinal-acute-graft-versus-host-disease-in-acute-leukemia-patients-after-haploidentical-peripheral-hematopoietic-stem-cell-transplantation
#16
Xiao-Ning Wang, Chun-Hong Sun, Cai-Li Guo, Jian-Na Yao, Shi-Huan Qi, Xin Liu, Jie-Ying Xi, Meng-Chang Wang, Peng-Cheng He, Mei Zhang
OBJECTIVE: To investigate the risk factors and therapeutic outcome of acute graft versus host disease (aGVHD) in patients with acute leukemia after haploidentical peripheral hematopoietic stem cell transplantation. METHODS: The clinical data of 19 cases of acute leukemia underwent haploidentical hematopoietic stem cell transplanttion during January 2010 and December 2010 were retrospectively analyzed. The effects of patients sex, donor-recipient sex difference, donor age, conditioning regimen, dosage of anti-thymocyte globulin(ATG), mononuclear cell and CD34(+) cell counts on the intestinal aGVHD were analyzed by Logistic regression...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641652/-significance-of-monitoring-minimal-residual-disease-by-flow-cytometry-in-acute-leukemia-patients-underwent-nonmyeloablative-allo-hsct
#17
Xiong-Xiong Liu, Tie-Qiang Liu, Mei Guo, Qi-Yun Sun, Jian-Hui Qiao, Kai-Xun Hu, Bing-Xia Li, Bo Yao, Chang-Lin Yu
OBJECTIVE: To explore the value of dynamically monitoring minimal residual disease (MRD) by flow cytometry before and after non-myeloablative allo-HSCT (NST) for prediction of acute leukemia(AL) relapse after transplantation. METHODS: The clinical data of 51 AL patients underwent NST were analyzed retrospectively in Department of Hematology of Affiliated Hospital of Academy of Military Medical Sciences from January 2011 to December 2015. All AL patients achieved the morphologic complete remission of bone marrow before transplantation...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641651/-effect-of-infusion-of-recipient-spleen-cells-at-different-time-after-murine-haploidentical-hematopoietic-stem-cell-transplantation-on-graft-versus-host-disease
#18
Jun-Hui Wang, Lei Deng, Lu Wang, Chen Liang, Yi Wang, Tie-Qiang Liu, Shan Huang, Ya-Jing Huang, Bo Cai, Zheng Dong, Hong-Li Zuo, Qi-Yun Sun, Jian-Hui Qiao, Chang-Lin Yu, Kai-Xun Hu, Hui-Sheng Ai, Mei Guo
OBJECTIVE: To explore the effect of infusing G-CSF mobilized recipient spleen cells at different time after haploidentical stem cell transplantation(HSCT) on graft-versus-host disease (GVHD) in mice and its possible mechanism. METHODS: Forty mice after HSCT were randomly divided into 4 groups (n=10): GVHD positive control group (control group), 1st d recipient cell infusion group after transplantation (+1 d group), 4th d recipient cell infusion group after transplantation(+4 d group), 7th d recipient cell infusion group after transplantation(+7 d group)...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641614/-effect-of-microrna-214-on-migration-of-cord-blood-cd34-cells-induced-by-bone-marrow-mesenchymal-stem-cells
#19
Jing Ming, Jian Wang, Xu Ye, Hui Xu, Xing-Bing Wang
OBJECTIVE: To investigate the possible effect of MicroRNA-214 (miR-214) on migration of umbilical cord blood CD34(+) hematopoietic stem/progenitor cells induced by BM-MSC. METHODS: After transfection of the inhibitor or mimic of miR-214, the cultured supernatant of BM-MSC were collected respectively. The expression of miR-214 in BM-MSC was detected by real time quantitative PCR, the effect of supernatant on CD34(+) cell migration was evaluated by chemotaxis assays...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641611/-dmso-promotes-hematopoietic-differentiation-of-human-embryonic-stem-cells-in-vitro
#20
Hong-Tao Wang, Meng-Ge Wang, Xin Liu, Pei Su, Lei-Sheng Zhang, Cui-Cui Liu, Yu Wang, Dan Wu, Qian Tu, Jia-Xi Zhou
OBJECTIVE: To explore the role of dimethyl sulfoxide (DMSO) in the hematopoietic differentiation of human embryonic stem cells (hESCs). METHODS: The role of DMSO in hematopoietic differentiation of hESC was investigated by using a established stepwise hematopoietic differentiation system from hESC, immunofluorescouse assay and flow cytometry. Furthermore, the window phase of DMSO action was explored by adding it to the different stage of hematopoietic differentiation...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
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