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Haematopoietic stem cell

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https://www.readbyqxmd.com/read/27909575/a-step-by-step-workflow-for-low-level-analysis-of-single-cell-rna-seq-data
#1
Aaron T L Lun, Davis J McCarthy, John C Marioni
Single-cell RNA sequencing (scRNA-seq) is widely used to profile the transcriptome of individual cells. This provides biological resolution that cannot be matched by bulk RNA sequencing, at the cost of increased technical noise and data complexity. The differences between scRNA-seq and bulk RNA-seq data mean that the analysis of the former cannot be performed by recycling bioinformatics pipelines for the latter. Rather, dedicated single-cell methods are required at various steps to exploit the cellular resolution while accounting for technical noise...
2016: F1000Research
https://www.readbyqxmd.com/read/27906175/impaired-haematopoietic-stem-cell-differentiation-and-enhanced-skewing-towards-myeloid-progenitors-in-aged-caspase-2-deficient-mice
#2
Swati Dawar, Nur Hezrin Shahrin, Nikolina Sladojevic, Richard J D'Andrea, Loretta Dorstyn, Devendra K Hiwase, Sharad Kumar
The apoptotic cysteine protease caspase-2 has been shown to suppress tumourigenesis in mice and its reduced expression correlates with poor prognosis in some human malignancies. Caspase-2-deficient mice develop normally but show ageing-related traits and, when challenged by oncogenic stimuli or certain stress, show enhanced tumour development, often accompanied by extensive aneuploidy. As stem cells are susceptible to acquiring age-related functional defects because of their self-renewal and proliferative capacity, we examined whether loss of caspase-2 promotes such defects with age...
December 1, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27905395/outside-in-integrin-signalling-regulates-haematopoietic-stem-cell-function-via-periostin-itgav-axis
#3
Satish Khurana, Sarah Schouteden, Javed K Manesia, Albert Santamaria-Martínez, Joerg Huelsken, Adam Lacy-Hulbert, Catherine M Verfaillie
Integrins play an important role in haematopoietic stem cell (HSC) maintenance in the bone marrow niche. Here, we demonstrate that Periostin (Postn) via interaction with Integrin-αv (Itgav) regulates HSC proliferation. Systemic deletion of Postn results in peripheral blood (PB) anaemia, myelomonocytosis and lymphopenia, while the number of phenotypic HSCs increases in the bone marrow. Postn(-/-) mice recover faster from radiation injury with concomitant loss of primitive HSCs. HSCs from Postn(-/-) mice show accumulation of DNA damage generally associated with aged HSCs...
December 1, 2016: Nature Communications
https://www.readbyqxmd.com/read/27893415/pentraxin-3-plasma-levels-at-graft-versus-host-disease-onset-predict-disease-severity-and-response-to-therapy-in-children-given-haematopoietic-stem-cell-transplantation
#4
Erica Dander, Paola De Lorenzo, Barbara Bottazzi, Paola Quarello, Paola Vinci, Adriana Balduzzi, Francesca Masciocchi, Sonia Bonanomi, Claudia Cappuzzello, Giulia Prunotto, Fabio Pavan, Fabio Pasqualini, Marina Sironi, Ivan Cuccovillo, Roberto Leone, Giovanni Salvatori, Matteo Parma, Elisabetta Terruzzi, Fabio Pagni, Franco Locatelli, Alberto Mantovani, Franca Fagioli, Andrea Biondi, Cecilia Garlanda, Maria Grazia Valsecchi, Attilio Rovelli, Giovanna D'Amico
Acute Graft-versus-Host Disease (GvHD) remains a major complication of allogeneic haematopoietic stem cell transplantation, with a significant proportion of patients failing to respond to first-line systemic corticosteroids. Reliable biomarkers predicting disease severity and response to treatment are warranted to improve its management. Thus, we sought to determine whether pentraxin 3 (PTX3), an acute-phase protein produced locally at the site of inflammation, could represent a novel acute GvHD biomarker. Using a murine model of the disease, we found increased PTX3 plasma levels after irradiation and at GvHD onset...
November 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/27892949/the-ebmt-eln-working-group-recommendations-on-the-prophylaxis-and-treatment-of-gvhd-a-change-control-analysis
#5
T Ruutu, A Gratwohl, D Niederwieser, T de Witte, S van der Werf, A van Biezen, M Mohty, N Kröger, A Rambaldi, E McGrath, A Sureda, G Basak, H Greinix, R F Duarte
In 2013, recommendations for a standardized practice in the prophylaxis and treatment of GvHD were adopted and published by the European Society for Blood and Marrow Transplantation and the European LeukemiaNet. One year later, all 341 European Society for Blood and Marrow Transplantation centres performing allogeneic haematopoietic stem cell transplantation were contacted for a change-control analysis and asked to fill in a questionnaire; 111 centres (33%) responded. Of these, 83% had been aware of the recommendations...
November 28, 2016: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/27892944/veno-occlusive-disease-sinusoidal-obstruction-syndrome-after-haematopoietic-stem-cell-transplantation-middle-east-north-africa-regional-consensus-on-prevention-diagnosis-and-management
#6
A H Al Jefri, H Abujazar, A Al-Ahmari, A Al Rawas, Z Al Zahrani, A Alhejazi, M A Bekadja, A Ibrahim, M Lahoucine, S Ousia, A Bazarbachi
Veno-occlusive disease/sinusoidal obstruction syndrome (VOD/SOS) of the liver is a serious, early complication of haematopoietic stem cell transplantation (HSCT), severe and very severe forms of which are associated with a high mortality rate. A wide variety of patient, disease and treatment-related risk factors for VOD/SOS have been identified. Several bodies have published recommendations for the diagnosis, prevention and management of VOD/SOS following HSCT. A group of regional experts have developed a consensus statement on the diagnosis, prevention and management of VOD/SOS in the Middle East and North Africa region to help in the management of HSCT patients in the region...
November 28, 2016: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/27879990/sequential-chemotherapy-followed-by-reduced-intensity-conditioning-and-allogeneic-haematopoietic-stem-cell-transplantation-in-adult-patients-with-relapse-or-refractory-acute-myeloid-leukaemia-a-survey-from-the-acute-leukaemia-working-party-of-ebmt
#7
Olle Ringdén, Myriam Labopin, Christoph Schmid, Behnam Sadeghi, Emmanuelle Polge, Johanna Tischer, Arnold Ganser, Mauricette Michallet, Lothar Kanz, Rainer Schwerdtfeger, Arnon Nagler, Mohamad Mohty
This study analysed the outcome of 267 patients with relapse/refractory acute myeloid leukaemia (AML) who received sequential chemotherapy including fludarabine, cytarabine and amsacrine followed by reduced-intensity conditioning (RIC) and allogeneic haematopoietic stem cell transplantation (HSCT). The transplants in 77 patients were from matched sibling donors (MSDs) and those in 190 patients were from matched unrelated donors. Most patients (94·3%) were given anti-T-cell antibodies. The incidence of acute graft-versus-host disease (GVHD) of grades II-IV was 32·1% and that of chronic GVHD was 30·2%...
November 23, 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/27876786/a-view-of-human-haematopoietic-development-from-the-petri-dish
#8
Andrea Ditadi, Christopher M Sturgeon, Gordon Keller
Human pluripotent stem cells (hPSCs) provide an unparalleled opportunity to establish in vitro differentiation models that will transform our approach to the study of human development. In the case of the blood system, these models will enable investigation of the earliest stages of human embryonic haematopoiesis that was previously not possible. In addition, they will provide platforms for studying the origins of human blood cell diseases and for generating de novo haematopoietic stem and progenitor cell populations for cell-based regenerative therapies...
November 23, 2016: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/27870830/clonal-fate-mapping-quantifies-the-number-of%C3%A2-haematopoietic-stem-cells-that-arise-during%C3%A2-development
#9
Jonathan Henninger, Buyung Santoso, Stefan Hans, Ellen Durand, Jessica Moore, Christian Mosimann, Michael Brand, David Traver, Leonard Zon
Haematopoietic stem cells (HSCs) arise in the developing aorta during embryogenesis. The number of HSC clones born has been estimated through transplantation, but experimental approaches to assess the absolute number of forming HSCs in a native setting have remained challenging. Here, we applied single-cell and clonal analysis of HSCs in zebrafish to quantify developing HSCs. Targeting creER(T2) in developing cd41:eGFP(+) HSCs enabled long-term assessment of their blood contribution. We also applied the Brainbow-based multicolour Zebrabow system with drl:creER(T2) that is active in early haematopoiesis to induce heritable colour barcoding unique to each HSC and its progeny...
November 21, 2016: Nature Cell Biology
https://www.readbyqxmd.com/read/27870355/impact-of-genomic-risk-factors-on-survival-after-haematopoietic-stem-cell-transplantation-for-patients-with-acute-leukaemia
#10
K F Pearce, Y Balavarca, J Norden, G Jackson, E Holler, R Dressel, H Greinix, A Toubert, E Gluckman, I Hromadnikova, P Sedlacek, D Wolff, U Holtick, H Bickeböller, A M Dickinson
The EBMT risk score is an established tool successfully used in the prognosis of survival post-HSCT and is applicable for a range of haematological disorders. One of its main advantages is that score generation involves summation of clinical parameters that are available pretransplant. However, the EBMT risk score is recognized as not being optimal. Previous analyses, involving patients with various diagnoses, have shown that non-HLA gene polymorphisms influence outcome after allogeneic HSCT. This study is novel as it focuses only on patients having acute leukaemia (N = 458) and attempts to demonstrate how non-HLA gene polymorphisms can be added to the EBMT risk score in a Cox regression model to improve prognostic ability for overall survival...
December 2016: International Journal of Immunogenetics
https://www.readbyqxmd.com/read/27868046/stress-induced-haematopoietic-stem-cell-proliferation-new-roles-for-p38%C3%AE-and-purine-metabolism
#11
EDITORIAL
Victoria A McGuire, J Simon C Arthur
No abstract text is available yet for this article.
2016: Stem Cell Investigation
https://www.readbyqxmd.com/read/27863874/successful-autologous-haematopoietic-stem-cell-transplantation-for-refractory-myasthenia-gravis-a-case-report
#12
Irene Håkansson, Anna Sandstedt, Fredrik Lundin, Håkan Askmark, Ritva Pirskanen, Kristina Carlson, Fredrik Piehl, Hans Hägglund
Myasthenia gravis (MG) is an autoimmune disease, with immune reactivity against the post-synaptic endplate of the neuromuscular junction. Apart from symptomatic treatment with choline esterase blockers, many patients also require immunomodulatory treatment. Despite existing treatment options, some patients are treatment refractory. We describe a patient with severe MG refractory to corticosteroids, four oral immunosuppressants, cyclophosphamide, rituximab and bortezomib who was treated with autologous haematopoietic stem cell transplantation...
September 28, 2016: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/27859940/family-members-life-situation-and-experiences-of-different-caring-organisations-during-allogeneic-haematopoietic-stem-cells-transplantation-a-qualitative-study
#13
K Bergkvist, J Larsen, U-B Johansson, J Mattsson, B Fossum
The aim of this study was to describe family members' life situation and experiences of care in two different care settings, the patient's home or in hospital during the acute post-transplantation phase after allogeneic haematopoietic stem cell transplantation (HSCT). Data were collected through semi-structured interviews with 14 family members (seven women and seven men). An inductive qualitative content analysis was used to analyse the data. The majority of the family members' (n = 10) had experiences from home care...
November 17, 2016: European Journal of Cancer Care
https://www.readbyqxmd.com/read/27858309/dental-care-approach-in-patients-with-osteopetrosis
#14
V Detailleur, G Vansteenkiste, M Renard, A Verdonck
AIM: To describe dental and dentofacial characteristics observed in patients diagnosed with osteopetrosis and to advise a dental care approach in these patients. METHODS: Four patients were clinically diagnosed with osteopetrosis, characterised by increased bone density, bone marrow failure, blindness and deafness due to compression of cranial nerves. All patients were dentally screened at different ages (2.5-31 years) and three of them were treated with a haematopoietic stem cell transplantation (HSCT) at the age of 6 months, 1 and 3...
November 17, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27856159/pre-implantation-genetic-diagnosis
#15
REVIEW
Joanne Traeger-Synodinos
The aim of pre-implantation genetic diagnosis (PGD) is to characterize the genetic status of the cells (usually single cells) that have been biopsied from oocytes/zygotes or embryos created in vitro during assisted reproductive treatment. PGD is a multi-step procedure that requires close collaboration between gynaecologists who are experts in assisted reproduction, embryologists who are experts in micromanipulation of germ cells and in embryo biopsy and geneticists who are experts in genetic analysis at the single-cell level...
October 26, 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27845732/the-complexity-of-targeting-pi3k-akt-mtor-signalling-in-human-acute-myeloid-leukaemia-the-importance-of-leukemic-cell-heterogeneity-neighbouring-mesenchymal-stem-cells-and-immunocompetent-cells
#16
REVIEW
Annette K Brenner, Tor Henrik Andersson Tvedt, Øystein Bruserud
Therapeutic targeting of PI3K-Akt-mTOR is considered a possible strategy in human acute myeloid leukaemia (AML); the most important rationale being the proapoptotic and antiproliferative effects of direct PI3K/mTOR inhibition observed in experimental studies of human AML cells. However, AML is a heterogeneous disease and these effects caused by direct pathway inhibition in the leukemic cells are observed only for a subset of patients. Furthermore, the final effect of PI3K-Akt-mTOR inhibition is modulated by indirect effects, i...
November 11, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27842866/reviewing-the-importance-and-evolution-of-fungal-infections-and-potential-antifungal-resistance-in-haematological-patients
#17
REVIEW
Alessandro Busca, Anna Maria Tortorano, Livio Pagano
There is a growing body of evidence supporting the emergence of azole resistance in Aspergillus and Candida spp. and this may be of particular concern due to the potential implications in the management of invasive fungal infections occurring in immunocompromised hosts. The aim of present review was to describe the magnitude of the problem, summarising the epidemiology and potential impact of yeast and mould antifungal resistance in patients with haematological malignancies. The first cases of triazole-resistant Aspergillus fumigatus isolates were reported in 1997 in patients receiving itraconazole...
December 2015: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27836923/single-nucleotide-polymorphism-array-snp-a-improves-the-identification-of-chromosomal-abnormalities-by-metaphase-cytogenetics-in-myelodysplastic-syndrome
#18
Fernanda Borges da Silva, João Agostinho Machado-Neto, Virginia Helena Leira Lipoli Bertini, Elvira Deolinda Rodrigues Pereira Velloso, Cristina Alonso Ratis, Rodrigo T Calado, Belinda Pinto Simões, Eduardo Magalhães Rego, Fabiola Traina
AIMS: The myelodysplastic syndromes (MDS) are a heterogeneous group of clonal haematopoietic stem cell disorders characterised by inefficient haematopoiesis and risk of progression to acute myeloid leukaemia. Metaphase cytogenetics is an extremely valuable clinical tool in the management of haematological malignancies. However, metaphase cytogenetics requires cellular proliferation, its sensitivity and resolution depends on the proportion of clonal cells in the sample and size of the lesion, respectively...
November 11, 2016: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/27834397/the-genetics-of-myelodysplastic-syndrome-from-clonal-haematopoiesis-to-secondary-leukaemia
#19
Adam S Sperling, Christopher J Gibson, Benjamin L Ebert
Myelodysplastic syndrome (MDS) is a clonal disease that arises from the expansion of mutated haematopoietic stem cells. In a spectrum of myeloid disorders ranging from clonal haematopoiesis of indeterminate potential (CHIP) to secondary acute myeloid leukaemia (sAML), MDS is distinguished by the presence of peripheral blood cytopenias, dysplastic haematopoietic differentiation and the absence of features that define acute leukaemia. More than 50 recurrently mutated genes are involved in the pathogenesis of MDS, including genes that encode proteins involved in pre-mRNA splicing, epigenetic regulation and transcription...
November 11, 2016: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/27833447/immune-recovery-and-the-risk-of-cmv-ebv-reactivation-in-children-post-allogeneic-haematopoietic-stem-cell-transplantation
#20
Małgorzata Janeczko, Monika Mielcarek, Blanka Rybka, Renata Ryczan-Krawczyk, Dorota Noworolska-Sauren, Krzysztof Kałwak
Immune reconstitution was studied prospectively in 86 children who underwent allogeneic haematopoietic stem cell transplantation (HSCT). We analysed the risk of cytomegalovirus (CMV) and Epstein-Barr virus (EBV) reactivation in correlation with the kinetics of immune recovery and in relation to other potential risk factors that may influence the reactivation of these viruses including: diagnosis, type of HSCT, source of stem cells, type of conditioning, or the occurrence of graft-versus-host disease (GvHD)...
2016: Central-European Journal of Immunology
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