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Haematopoietic stem cell

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https://www.readbyqxmd.com/read/29035359/acute-myeloid-leukaemia-disrupts-endogenous-myelo-erythropoiesis-by-compromising-the-adipocyte-bone-marrow-niche
#1
Allison L Boyd, Jennifer C Reid, Kyle R Salci, Lili Aslostovar, Yannick D Benoit, Zoya Shapovalova, Mio Nakanishi, Deanna P Porras, Mohammed Almakadi, Clinton J V Campbell, Michael F Jackson, Catherine A Ross, Ronan Foley, Brian Leber, David S Allan, Mitchell Sabloff, Anargyros Xenocostas, Tony J Collins, Mickie Bhatia
Acute myeloid leukaemia (AML) is distinguished by the generation of dysfunctional leukaemic blasts, and patients characteristically suffer from fatal infections and anaemia due to insufficient normal myelo-erythropoiesis. Direct physical crowding of bone marrow (BM) by accumulating leukaemic cells does not fully account for this haematopoietic failure. Here, analyses from AML patients were applied to both in vitro co-culture platforms and in vivo xenograft modelling, revealing that human AML disease specifically disrupts the adipocytic niche in BM...
October 16, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/29033080/reconstitution-of-th17-tc17-and-treg-cells-after-paediatric-haematopoietic-stem-cell-transplantation-impact-of-interleukin-7
#2
Katrine Kielsen, Lars P Ryder, David Lennox-Hvenekilde, Monika Gad, Claus H Nielsen, Carsten Heilmann, Marianne Ifversen, Anders Elm Pedersen, Klaus Müller
Successful reconstitution of T lymphocytes after allogeneic haematopoietic stem cell transplantation (HSCT) is needed to establish the graft-versus-leukaemia effect and an effective anti-microbial defense, but the ratio between functionally different T-cell subsets needs to be balanced to avoid graft-versus-host disease (GVHD). IL-7 is essential for T-cell generation in the thymus and peripheral T-cell homeostasis. High IL-7 levels have been associated with impaired T-cell reconstitution, increased risk of acute GVHD and treatment-related mortality, but the underlying cellular mechanisms behind these associations have not been investigated previously...
October 9, 2017: Immunobiology
https://www.readbyqxmd.com/read/29027756/what-is-the-outcome-in-patients-with-acute-leukaemia-who-survive-severe-acute-graft-versus-host-disease
#3
Olle Ringdén, Myriam Labopin, Behnam Sadeghi, Audrey Mailhol, Dietrich Beelen, Yngvar Fløisand, Ardeshir Ghavamzadeh, Jürgen Finke, Gerhard Ehninger, Liisa Volin, Gérard Socié, Nicolaus Kröger, Gernot Stuhler, Arnold Ganser, Christoph Schmid, Sebastian Giebel, Mohamad Mohty, Arnon Nagler
Acute graft-versus-host disease (aGVHD) is a major complication of allogeneic haematopoietic stem cell transplantation (HSCT). With new promising therapies, survival may improve for severe aGVHD. We wanted to analyze the long-term outcome in patients who survive severe aGVHD. This study was a landmark analysis of 23,567 patients with acute Leukaemia who survived for more than 6 months after HSCT, 2002-2014. Patients alive after severe aGVHD (n = 1,738) were compared to controls. Patients with severe aGVHD had higher non-relapse mortality (NRM) and higher rate of extensive chronic GVHD (cGVHD) than the controls (p < 10(-5) )...
October 13, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29027353/early-predictors-of-mortality-in-children-with-pulmonary-complications-after-haematopoietic-stem-cell-transplantation
#4
Yu Hyeon Choi, Hyung Joo Jeong, Hong Yul An, You Sun Kim, Eui Jun Lee, Bongjin Lee, Hyoung Jin Kang, Hee Young Shin, June Dong Park
PC are a main cause of death following HSCT in children. We aimed to evaluate early predictors of mortality in paediatric recipients with PCs. A retrospective observational study of 35 patients with 49 episodes of PI on chest radiography (of 124 patients) who had undergone HSCT at a tertiary university hospital between January 2011 and December 2012 was performed. During follow-up (median 26.1 months), 15 episodes led to death (30.6%). An aetiologic diagnosis was made by non-invasive tests in 24 episodes (49...
October 12, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/29025286/-thalidomide-therapy-in-relapsed-diffuse-large-b-cell-lymphoma-in-elderly-patients-three-cases
#5
Nikolett Wohner, Gergely Varga, Péter Szloboda, Péter Farkas, András Masszi, Laura Horváth, Gergely Szombath, Judit Várkonyi, Szabolcs Benedek, Tamás Masszi
Diffuse large B-cell lymphoma (DLBCL), a high-grade lymphoproliferative disease, is the most common lymphoma in adults, representing 31% of non-Hodgkin lymphomas (NHL). In elderly patients treatment is problematic because of the high toxicity of standard chemotherapy protocols, especially in relapsed cases, where high-dose chemotherapy and haematopoietic stem cell transplantation would be the best choice. More and more data is becoming available on alternative treatment of refractory/relapsed NHL, including studies on the positive effect of thalidomide and second generation IMiDs in DLBCL, which are already part of the standard treatment protocol in myeloma multiplex and myelodysplasia...
October 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29023764/liver-diseases-in-adult-life-after-childhood-cancer-in-scandinavia-aliccs-a-population-based-cohort-study-of-32-839-one-year-survivors
#6
Trine Gade Bonnesen, Jeanette F Winther, Klaus K Andersen, Peter H Asdahl, Sofie de Fine Licht, Thorgerdur Gudmundsdottir, Anna Sällfors Holmqvist, Laura-Maria Madanat-Harjuoja, Laufey Tryggvadottir, Finn Wesenberg, Carsten Heilmann, Jørgen H Olsen, Henrik Hasle
Information on late onset liver complications after childhood cancer is scarce. To ensure an appropriate follow-up of childhood cancer survivors and reducing late liver complications, the need for comprehensive and accurate information is presented. We evaluate the risk of liver diseases in a large childhood cancer survivor cohort. We included all one-year survivors of childhood cancer treated in the five Nordic countries. A Cox proportional hazards model was used to estimate hospitalisation rate (hazard) ratios (HRs) for each liver outcome according to type of cancer...
October 11, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29017180/targeting-apoptosis-in-acute-myeloid-leukaemia
#7
REVIEW
Philippe A Cassier, Marie Castets, Amine Belhabri, Norbert Vey
Acute myeloid leukaemia (AML) is a molecularly and clinically heterogeneous disease, and its incidence is increasing as the populations in Western countries age. Despite major advances in understanding the genetic landscape of AML and its impact on the biology of the disease, standard therapy has not changed significantly in the last three decades. Allogeneic haematopoietic stem cell transplantation remains the best chance for cure, but can only be offered to a minority of younger fit patients. Molecularly targeted drugs aiming at restoring apoptosis in leukaemic cells have shown encouraging activity in early clinical trials and some of these drugs are currently being evaluated in randomised controlled trials...
October 10, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29017084/disseminated-adenovirus-infection-after-allogeneic-stem-cell-transplant-and-the-potential-role-of-brincidofovir-case-series-and-10-year-experience-of-management-in-an-adult-transplant-cohort
#8
Isobel D Ramsay, Charlotte Attwood, Dianne Irish, Paul D Griffiths, Charalampia Kyriakou, David M Lowe
BACKGROUND: Adenovirus infection is a recognized complication following haematopoietic stem cell transplantation. We present a review of our experience of these infections in our transplant cohort over 10 years including 3 patients treated with the novel antiviral brincidofovir. OBJECTIVES: We aimed to describe the presentation, response to treatment and outcomes of adult stem cell transplant patients with disseminated adenovirus infection. STUDY DESIGN: All adult cases of disseminated adenovirus infection following haematopoietic stem cell transplant in our unit between 2005 and 2015 were identified...
October 3, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28994199/inhibition-of-mek-erk-signalling-pathway-promotes-erythroid-differentiation-and-reduces-hscs-engraftment-in-ex%C3%A2-vivo-expanded-haematopoietic-stem-cells
#9
Morteza Zarrabi, Elaheh Afzal, Mohammad Hossein Asghari, Monireh Mohammad, Hamidreza Aboulkheyr Es, Marzieh Ebrahimi
The MEK/ERK pathway is found to be important in regulating different biological processes such as proliferation, differentiation and survival in a wide variety of cells. However, its role in self-renewal of haematopoietic stem cells is controversial and remains to be clarified. The aim of this study was to understand the role of MEK/ERK pathway in ex vivo expansion of mononuclear cells (MNCs) and purified CD34(+) cells, both derived from human umbilical cord blood (hUCB). Based on our results, culturing the cells in the presence of an inhibitor of MEK/ERK pathway-PD0325901 (PD)-significantly reduces the expansion of CD34(+) and CD34(+)  CD38(-) cells, while there is no change in the expression of stemness-related genes (HOXB4, BMI1)...
October 10, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28993886/thrombotic-microangiopathy-following-haematopoietic-stem-cell-transplant
#10
Eleanor G Seaby, Rodney D Gilbert
Thrombotic microangiopathy is a potentially lethal complication of haematopoietic stem cell (bone marrow) transplantation. The pathophysiology is incompletely understood, although endothelial damage appears to be central. Platelet activation, neutrophil extracellular traps and complement activation appear to play key roles. Diagnosis may be difficult and universally accepted diagnostic criteria are not available. Treatment remains controversial. In some cases, withdrawal of calcineurin inhibitors is adequate...
October 9, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28990287/mesenchymal-like-stem-cells-in-canine-ovary-show-high-differentiation-potential
#11
A B Trindade, J Therrien, J M Garcia, L C Smith
OBJECTIVES: Recent studies have reported the existence of stem cells in ovarian tissue that show enhanced proliferative and differentiation potential compared to other adult tissues. Based on this evidence, we hypothesized that ovarian tissue contained mesenchymal-like stem cells (MSC) that could be isolated using a novel rapid plastic adhesion technique. MATERIALS AND METHODS: We established MSC lines derived from ovarian and adipose tissue based on their ability to rapidly adhere to plastic culture dishes in the first 3 hours after plating and studied their potentiality in terms of molecular markers and differentiation capacity...
October 8, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28987962/association-of-cytokine-gene-polymorphisms-with-the-complications-of-allogeneic-haematopoietic-stem-cell-transplantation
#12
Anna Dukat-Mazurek, Maria Bieniaszewska, Andrzej Hellmann, Grażyna Moszkowska, Piotr Trzonkowski
The purpose of our study was to confirm the prevalence of the association between single nucleotide polymorphisms present in genes encoding cytokines and the complications occurring after haematopoietic stem cell transplantation (HSCT). 108 recipients and 81 donors were typed for TNF-α (-308), TGF-β1 (codon 10,25), IL-10 (-1082,-819,-592), IL-6 (-174) and INF-γ (+874). Our studies have shown a tendency toward association between the occurrence of acute form of graft versus host disease (aGVHD) and IL-6 genotype...
October 4, 2017: Human Immunology
https://www.readbyqxmd.com/read/28986560/the-telomere-binding-protein-pot1-maintains-haematopoietic-stem-cell-activity-with-age
#13
Kentaro Hosokawa, Ben D MacArthur, Yoshiko Matsumoto Ikushima, Hirofumi Toyama, Yoshikazu Masuhiro, Shigemasa Hanazawa, Toshio Suda, Fumio Arai
Repeated cell divisions and aging impair stem cell function. However, the mechanisms by which this occurs are not fully understood. Here we show that protection of telomeres 1A (Pot1a), a component of the Shelterin complex that protects telomeres, improves haematopoietic stem cell (HSC) activity during aging. Pot1a is highly expressed in young HSCs, but declines with age. In mouse HSCs, Pot1a knockdown increases DNA damage response (DDR) and inhibits self-renewal. Conversely, Pot1a overexpression or treatment with POT1a protein prevents DDR, maintained self-renewal activity and rejuvenated aged HSCs upon ex vivo culture...
October 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28983600/cd146-skeletal-stem-cells-from-growth-plate-exhibit-specific-chondrogenic-differentiation-capacity-in%C3%A2-vitro
#14
Ying-Xing Wu, Xing-Zhi Jing, Yue Sun, Ya-Ping Ye, Jia-Chao Guo, Jun-Ming Huang, Wei Xiang, Jia-Ming Zhang, Feng-Jing Guo
Skeletal stem cells (SSCs) are a population of progenitor cells which give rise to postnatal skeletal tissues including bone, cartilage and bone marrow stroma, however not to adipose, haematopoietic or muscle tissue. Growth plate chondrocytes exhibit the ability of continuous proliferation and differentiation, which contributes to the continuous physiological growth. The growth plate has been hypothesized to contain SSCs which exhibit a desirable differentiation capacity to generate bone and cartilage. Due to the heterogeneity of the growth plate chondrocytes, SSCs in the growth plate are not well studied...
September 26, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28973433/lmo2-is-required-for-tal1-dna-binding-activity-and-initiation-of-definitive-haematopoiesis-at-the-haemangioblast-stage
#15
Vesna S Stanulovic, Pierre Cauchy, Salam A Assi, Maarten Hoogenkamp
LMO2 is a bridging factor within a DNA binding complex and is required for definitive haematopoiesis to occur. The developmental stage of the block in haematopoietic specification is not known. We show that Lmo2-/- mouse embryonic stem cells differentiated to Flk-1+ haemangioblasts, but less efficiently to haemogenic endothelium, which only produced primitive haematopoietic progenitors. Genome-wide approaches indicated that LMO2 is required at the haemangioblast stage to position the TAL1/LMO2/LDB1 complex to regulatory elements that are important for the establishment of the haematopoietic developmental program...
September 29, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28965224/effect-of-thrombopoietin-receptor-agonists-on-leukocyte-and-haematopoietic-stem-and-progenitor-cells-in-the-peripheral-blood-of-patients-with-immune-thrombocytopenic-purpura
#16
Gürkan Bal, Depré Fabian, Dzamashvili Maia, Frauke Ringel, Abdulgabar Salama
The thrombopoietin receptor agonists (TPO-RAs), romiplostim and eltrombopag, stimulate megakaryopoiesis and thereby increase platelet counts. Both drugs are increasingly used in the treatment of immune thrombocytopenic purpura (ITP). To assess the effect of TPO-RAs on trilineage haematopoiesis, colony-forming cell (CFC) assays were performed on peripheral blood mononuclear cells of 8 healthy donors and 52 ITP patients. Additionally, we revaluated the regular and complete blood counts (CBCs) performed during romiplostim therapy in 45 patients and the CBCs performed in 9 patients during eltrombopag therapy...
September 30, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28956197/bone-marrow-sinusoidal-endothelium-damage-and-potential-regeneration-following-cancer-radiotherapy-or-chemotherapy
#17
REVIEW
Mohammadhossein Hassanshahi, Alireza Hassanshahi, Samira Khabbazi, Yu-Wen Su, Cory J Xian
It is very well known that bone marrow (BM) microvasculature may possess a crucial role in the maintenance of homeostasis of BM due to mutual interactions between BM microvascular system and other physiological functions including haematopoiesis and osteogenesis. Chemotherapy and radiotherapy are known as main approaches for cancer treatment and also are known as the main cause of damage to the BM microvascular system. However, despite the importance of BM microvasculature in orchestrating various biological functions, less attention has been drawn to address the underlying mechanisms for the damage and to explore cellular and molecular mechanisms by which the recovery/regeneration of chemotherapy- and/or radiotherapy-induced BM microvascular system damage can occur...
September 27, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28951581/acute-graft-versus-host-disease-of-the-gut-considerations-for-the-gastroenterologist
#18
REVIEW
Steven Naymagon, Leonard Naymagon, Serre-Yu Wong, Huaibin Mabel Ko, Anne Renteria, John Levine, Jean-Frederic Colombel, James Ferrara
Haematopoietic stem cell transplantation (HSCT) is central to the management of many haematological disorders. A frequent complication of HSCT is acute graft-versus-host disease (GVHD), a condition in which immune cells from the donor attack healthy recipient tissues. The gastrointestinal system is among the most common sites affected by acute GVHD, and severe manifestations of acute GVHD of the gut portends a poor prognosis in patients after HSCT. Acute GVHD of the gastrointestinal tract presents both diagnostic and therapeutic challenges...
September 27, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28948565/experience-with-saccharomyces-boulardii-probiotic-in-oncohaematological-patients
#19
Beata Sulik-Tyszka, Emilian Snarski, Magda Niedźwiedzka, Małgorzata Augustyniak, Thorvald Nilsen Myhre, Anna Kacprzyk, Ewa Swoboda-Kopeć, Marta Roszkowska, Jadwiga Dwilewicz-Trojaczek, Wiesław Wiktor Jędrzejczak, Marta Wróblewska
Very few reports have been published to date on the bloodstream infections caused by Saccharomyces spp. in oncohaematological patients, and there are no guidelines on the use of this probiotic microorganism in this population. We describe the use of probiotic preparation containing Saccharomyces boulardii in a large group of oncohaematological patients. We retrospectively analysed the data from 32,000 patient hospitalisations at the haematological centre during 2011-2013 (including 196 haematopoietic stem cell transplant recipients) in a tertiary care university-affiliated hospital...
September 25, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28932646/reconstitution-of-multifunctional-cd56-low-cd16-low-natural-killer-cell-subset-in-children-with-acute-leukemia-given-%C3%AE-%C3%AE-t-cell-depleted-hla-haploidentical-haematopoietic-stem-cell-transplantation
#20
Stabile Helena, Nisti Paolo, Peruzzi Giovanna, Fionda Cinzia, Pagliara Daria, Pomonia Brescia Letizia, Merli Pietro, Locatelli Franco, Angela Santoni, Angela Gismondi
We recently described the CD56(low)CD16(low) subset of Natural Killer (NK) cells that both mediate cytotoxic activity and produce IFNγ, being more abundant in bone marrow (BM) than in peripheral blood (PB) of pediatric normal subjects. Given the multifunctional properties of this subset, we examined its development and functional recovery in a cohort of children undergoing α/β T-cell depleted HLA-haploidentical haematopoietic stem cell transplantation (HSCT). The results obtained indicate that CD56(low)CD16(low) NK cells are present in both PB and BM already at one month post-HSCT, with an increased frequency in BM of graft recipients as compared with normal subjects...
2017: Oncoimmunology
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