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https://www.readbyqxmd.com/read/29453290/mouse-and-human-hspc-immobilization-in-liquid-culture-by-cd43-or-cd44-antibody-coating
#1
Dirk Loeffler, Weijia Wang, Alois Hopf, Oliver Hilsenbeck, Paul E Bourgine, Fabian Rudolf, Ivan Martin, Timm Schroeder
Keeping track of individual cell identifications is imperative to the study of dynamic single cell behavior over time. Highly motile hematopoietic stem and progenitor cells (HSPCs) migrate quickly and do not adhere, and thus must be imaged very frequently to keep cell identifications. Even worse, they are also flushed away during medium exchange. To overcome these limitations, we tested antibody coating for reducing HSPC motility in vitro. Anti-CD43 and -CD44 antibody coating reduced cell motility of mouse and human HSPCs in a concentration dependent manner...
February 16, 2018: Blood
https://www.readbyqxmd.com/read/29453249/hhex-induces-promyelocyte-self-renewal-and-cooperates-with-growth-factor-independence-to-cause-myeloid-leukemia-in-mice
#2
Jacob T Jackson, Ashley P Ng, Benjamin J Shields, Sue Haupt, Ygal Haupt, Matthew P McCormack
The hematopoietically expressed homeobox (Hhex) transcription factor is overexpressed in human myeloid leukemias. Conditional knockout models of murine acute myeloid leukemia indicate that Hhex maintains leukemia stem cell self-renewal by enabling Polycomb-mediated epigenetic repression of the Cdkn2a tumor suppressor locus, encoding p16 Ink4a and p19 Arf However, whether Hhex overexpression also affects hematopoietic differentiation is unknown. To study this, we retrovirally overexpressed Hhex in hematopoietic progenitors...
February 27, 2018: Blood Advances
https://www.readbyqxmd.com/read/29453226/modeling-the-human-bone-marrow-niche-in-mice-from-host-bone-marrow-engraftment-to-bioengineering-approaches
#3
REVIEW
Ander Abarrategi, Syed A Mian, Diana Passaro, Kevin Rouault-Pierre, William Grey, Dominique Bonnet
Xenotransplantation of patient-derived samples in mouse models has been instrumental in depicting the role of hematopoietic stem and progenitor cells in the establishment as well as progression of hematological malignancies. The foundations for this field of research have been based on the development of immunodeficient mouse models, which provide normal and malignant human hematopoietic cells with a supportive microenvironment. Immunosuppressed and genetically modified mice expressing human growth factors were key milestones in patient-derived xenograft (PDX) models, highlighting the importance of developing humanized microenvironments...
February 16, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29451944/total-hip-arthroplasty-in-patients-with-avascular-necrosis-after-hematopoietic-stem-cell-transplantation
#4
Anita Vijapura, Harlan B Levine, Michele Donato, Mark A Hartzband, Melissa Baker, Gregg R Klein
The immunosuppressive regimens required for hematopoietic stem cell transplantation predispose recipients to complications, including avascular necrosis. Cancer-related comorbidities, immunosuppression, and poor bone quality theoretically increase the risk for perioperative medical complications, infection, and implant-related complications in total joint arthroplasty. This study reviewed 20 primary total hip arthroplasties for avascular necrosis in 14 patients. Outcomes were assessed at routine clinical visits and Harris hip scores were calculated...
February 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29451855/in-vivo-labeling-by-cd73-marks-multipotent-stromal-cells-and-highlights-endothelial-heterogeneity-in-the-bone-marrow-niche
#5
Martin Breitbach, Kenichi Kimura, Tiago C Luis, Christopher J Fuegemann, Petter S Woll, Michael Hesse, Raffaella Facchini, Sarah Rieck, Katarzyna Jobin, Julia Reinhardt, Osamu Ohneda, Daniela Wenzel, Caroline Geisen, Christian Kurts, Wolfgang Kastenmüller, Michael Hölzel, Sten E W Jacobsen, Bernd K Fleischmann
Despite much work studying ex vivo multipotent stromal cells (MSCs), the identity and characteristics of MSCs in vivo are not well defined. Here, we generated a CD73-EGFP reporter mouse to address these questions and found EGFP + MSCs in various organs. In vivo, EGFP + mesenchymal cells were observed in fetal and adult bones at proliferative ossification sites, while in solid organs EGFP + cells exhibited a perivascular distribution pattern. EGFP + cells from the bone compartment could be clonally expanded ex vivo from single cells and displayed trilineage differentiation potential...
February 1, 2018: Cell Stem Cell
https://www.readbyqxmd.com/read/29451493/er%C3%AE-promotes-murine-hematopoietic-regeneration-through-the-ire1%C3%AE-mediated-unfolded-protein-response
#6
Richard H Chapple, Tianyuan Hu, Yu-Jung Tseng, Lu Liu, Ayumi Kitano, Victor Luu, Kevin A Hoegenauer, Takao Iwawaki, Qing Li, Daisuke Nakada
Activation of the unfolded protein response (UPR) sustains protein homeostasis (proteostasis) and plays a fundamental role in tissue maintenance and longevity of organisms. Long-range control of UPR activation has been demonstrated in invertebrates, but such mechanisms in mammals remain elusive. Here, we show that the female sex hormone estrogen regulates the UPR in hematopoietic stem cells (HSCs). Estrogen treatment increases the capacity of HSCs to regenerate the hematopoietic system upon transplantation and accelerates regeneration after irradiation...
February 16, 2018: ELife
https://www.readbyqxmd.com/read/29451477/-regulation-of-hematopoietic-stem-and-progenitor-cells-by-stroma-derived-extracellular-vesicles
#7
Grégoire Stik, Laurence Petit, Pierre Charbord, Thierry Jaffredo, Charles Durand
No abstract text is available yet for this article.
February 2018: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/29450941/hematogenous-dissemination-of-mesenchymal-stem-cells-from-endometriosis
#8
Fei Li, Myles H Alderman, Aya Tal, Ramanaiah Mamillapalli, Alexis Coolidge, Demetra Hufnagel, Zhihao Wang, Elham Neisani, Stephanie Gidicsin, Graciela Krikun, Hugh S Taylor
Endometriosis is ectopic growth of endometrial tissue traditionally thought to arise through retrograde menstruation. We aimed to determine if cells derived from endometriosis could enter vascular circulation and lead to hematogenous dissemination. Experimental endometriosis was established by transplanting endometrial tissue from DsRed+ mice into the peritoneal cavity of DsRed- mice. Using flow cytometry, we identified DsRed+ cells in blood of animals with endometriosis. The circulating donor cells expressed CXCR4 and mesenchymal stem cell (MSC) biomarkers, but not hematopoietic stem cell markers...
February 16, 2018: Stem Cells
https://www.readbyqxmd.com/read/29449433/highly-similar-genomic-landscapes-in-monoclonal-b-cell-lymphocytosis-and-ultra-stable-chronic-lymphocytic-leukemia-with-low-frequency-of-driver-mutations
#9
Andreas Agathangelidis, Viktor Ljungström, Lydia Scarfò, Claudia Fazi, Maria Gounari, Tatjana Pandzic, Lesley-Ann Sutton, Kostas Stamatopoulos, Giovanni Tonon, Richard Rosenquist, Paolo Ghia
Despite the recent discovery of recurrent driver mutations in chronic lymphocytic leukemia, the genetic factors involved in disease onset remain largely unknown. To address this issue, we performed whole-genome sequencing in 11 individuals with monoclonal B-cell lymphocytosis, both of the low-count and high-count subtypes, and 5 patients with ultra-stable chronic lymphocytic leukemia (>10 years without progression from initial diagnosis). All three entities were indistiguishable at the genomic level exhibiting low genomic complexity and similar types of somatic mutations...
February 15, 2018: Haematologica
https://www.readbyqxmd.com/read/29448057/hla-matched-sibling-vs-unrelated-vs-haploidentical-related-donor-allogeneic-hematopoietic-stem-cell-transplantation-for-patients-aged-over-60-years-with-acute-myeloid-leukemia-a-single-center-donor-comparison
#10
Raynier Devillier, Faezeh Legrand, Jérôme Rey, Luca Castagna, Sabine Fürst, Angela Granata, Aude Charbonnier, Samia Harbi, Evelyne d'Incan, Thomas Pagliardini, Catherine Faucher, Claude Lemarie, Colombe Saillard, Boris Calmels, Bilal Mohty, Valerio Maisano, Pierre-Jean Weiller, Christian Chabannon, Norbert Vey, Didier Blaise
Haploidentical related donor (HRD) allogeneic hematopoietic stem cell transplantation (Allo-HSCT) was developed as a valid option for the treatment of acute myeloid leukemia (AML) in the absence of a matched donor. However, many investigators are reluctant to consider the use of this alternative in elderly patients, anticipating high morbidity. Here, we report a single-center comparison of HRD vs. matched sibling donor (MSD) and unrelated donor (UD) Allo-HSCT for patients with AML aged ≥60 years. Ninety-four patients (MSD: n = 31; UD: n = 30; HRD: n = 33) were analyzed...
February 12, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29446074/a-hitchhiker-s-guide-to-humanized-mice-new-pathways-to-studying-viral-infections
#11
REVIEW
J K Skelton, A M Ortega-Prieto, M Dorner
Humanized mice are increasingly appreciated as an incredibly powerful platform for infectious disease research. The often very narrow species tropism of many viral infections, coupled with the sometimes-misleading results from preclinical studies in animal models (e.g. fatal immune reactions in the PEARL study 1 ) further emphasize the need for more predictive model systems based on human cells rather than surrogates. Humanized mice represent such a model and have been greatly enhanced in regards to their immune system reconstitution as well as immune functionality in the past years, resulting in their recommendation as pre-clinical model by the US Food and Drug Administration...
February 15, 2018: Immunology
https://www.readbyqxmd.com/read/29445623/bone-marrow-stem-cells-to-destroy-circulating-hiv-a-hypothetical-therapeutic-strategy
#12
Umesh Chandra Halder
Human immunodeficiency virus (HIV) still poses enigmatic threats to human life. This virus has mastered in bypassing anti retroviral therapy leading to patients' death. Circulating viruses are phenomenal for the disease outcome. This hypothesis proposes a therapeutic strategy utilizing receptor-integrated hematopoietic, erythroid and red blood cells. Here, HIV specific receptors trap circulating viruses that enter erythrocyte cytoplasm and form inactive integration complex. This model depicts easy, effective removal of circulating HIV without any adverse effect...
December 2018: Journal of Biological Research
https://www.readbyqxmd.com/read/29444931/complete-remission-with-reduction-of-high-risk-clones-following-haploidentical-nk-cell-therapy-against-mds-and-aml
#13
Andreas T Björklund, Mattias Carlsten, Ebba Sohlberg, Lisa L Liu, Trevor Clancy, Mohsen Karimi, Sarah Cooley, Jeffrey S Miller, Monika Klimkowska, Marie Schaffer, Emma Watz, Kristina I Wikstrom, Pontus Blomberg, Bjorn E Wahlin, Marzia Palma, Lotta Hansson, Per Ljungman, Eva Hellström-Lindberg, Hans-Gustaf Ljunggren, Karl-Johan Malmberg
PURPOSE: To evaluate the safety, efficacy and immunobiological correlates of allogeneic NK cell-based therapy in primary chemotherapy-refractory or relapsed high-risk myelodysplastic syndrome (MDS), secondary AML (MDS/AML), and de novo AML patients. EXPERIMENTAL DESIGN: Sixteen patients received fludarabine/cyclophosphamide conditioning combined with total lymphoid irradiation followed by adoptive immunotherapy with IL-2-activated haploidentical NK cells. RESULTS: NK cell infusions were well tolerated with only transient adverse events observed in the 16 patients...
February 14, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29443409/cellular-collection-by-apheresis
#14
REVIEW
Anand Padmanabhan
Cellular collection is an important and increasingly used apheresis procedure. These collections are performed by leukocytapheresis, a procedure involving the removal of a patient's or donor's white blood cells, and are used to collect hematopoietic progenitor cells, specific cell populations (such as T-lymphocytes), and granulocytes. Hematopoietic progenitor cell apheresis and T-lymphocyte collection are performed by procedures that enrich for mononuclear cells. Hematopoietic progenitor cells are used for autologous and allogeneic hematopoietic stem cell transplantation, whereas T-cell collection is being used increasingly in novel cellular therapy approaches and for donor lymphocyte infusions to induce graft-versus-leukemia effect...
February 2018: Transfusion
https://www.readbyqxmd.com/read/29442161/allogeneic-hematopoietic-stem-cell-transplantation-in-primary-cutaneous-t-cell-lymphoma
#15
Laura Cudillo, Raffaella Cerretti, Alessandra Picardi, Benedetta Mariotti, Gottardo De Angelis, Maria Cantonetti, Massimiliano Postorino, Eleonora Ceresoli, Giovanna De Santis, Daniela Nasso, Francesco Pisani, Enrico Scala, Fabio Di Piazza, Alessandro Lanti
In our retrospective study, 16 patients affected by advanced cutaneous T cell lymphoma (CTCL) underwent allogeneic hematopoietic stem cell transplantation (HSCT). Two patients (12.5%) were in complete remission (CR), nine (56.3%) in partial remission (PR), and five (31.2%) with active disease. The patients were transplanted from an HLA-identical (n = 7) from a mismatched (n = 1) or haploidentical (n = 1) sibling, from matched unrelated donor (n = 5), or from a single cord blood unit (n = 2). Conditioning regimen was standard myeloablative in 6 patients and at reduced intensity in 10...
February 13, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29440738/advantages-of-non-cryopreserved-autologous-hematopoietic-stem-cell-transplantation-against-a-cryopreserved-strategy
#16
M Sarmiento, P Ramírez, R Parody, M Q Salas, N Beffermann, V Jara, P Bertín, I Pizarro, C Lorca, E Rivera, M Galleguillos, M Ocqueteau, I Sánchez-Ortega, B Patiño, A Sureda
Autologous stem cell transplantation (auto-HSCT) is an effective treatment strategy for hematological malignancies. The standard mode of handling hematopoietic progenitors for the autologous procedure (CRYO) consists on its collection and freezing with dimethyl sulfoxide (DMSO) and its subsequent thawing and re-infusion. This process is toxic and expensive. Non-cryopreserved (non-CRYO) is a less expensive mode of auto-HSCT. We designed a comparative study between both strategies performed in two different centers to analyze the short-term complications...
February 13, 2018: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/29439554/pilot-study-on-mass-spectrometry-based-analysis-of-the-proteome-of-cd34%C3%A2-%C2%BAcd123%C3%A2-%C2%BA-progenitor-cells-for-the-identification-of-potential-targets-for-immunotherapy-in-acute-myeloid-leukemia
#17
Johannes R Schmidt, Elke Rücker-Braun, Katharina Heidrich, Malte von Bonin, Friedrich Stölzel, Christian Thiede, Jan M Middeke, Gerhard Ehninger, Martin Bornhäuser, Johannes Schetelig, Kristin Schubert, Martin von Bergen, Falk Heidenreich
Targeting of leukemic stem cells with specific immunotherapy would be an ideal approach for the treatment of myeloid malignancies, but suitable epitopes are unknown. The comparative proteome-level characterization of hematopoietic stem and progenitor cells from healthy stem cell donors and patients with acute myeloid leukemia has the potential to reveal differentially expressed proteins which can be used as surface-markers or as proxies for affected molecular pathways. We employed mass spectrometry methods to analyze the proteome of the cytosolic and the membrane fraction of CD34 and CD123 co-expressing FACS-sorted leukemic progenitors from five patients with acute myeloid leukemia...
February 12, 2018: Proteomes
https://www.readbyqxmd.com/read/29439185/extracellular-vesicles-in-the-hematopoietic-microenvironment
#18
John T Butler, Sherif Abdelhamed, Peter Kurre
Self-renewal and differentiation are defining characteristics of hematopoietic stem and progenitor cells, and their balanced regulation is central to lifelong function of both blood and immune systems. In addition to cell intrinsic programs, hematopoietic stem and progenitor cells fate decisions are subject to extrinsic cues from within the bone marrow microenvironment and systemically. Yet, many of the paracrine and endocrine mediators that shape hematopoietic function remain to be discovered. Extracellular vesicles serve as evolutionarily conserved, constitutive regulators of cell and tissue homeostasis, with several recent reports supporting a role for extracellular vesicles in the regulation of hematopoiesis...
February 8, 2018: Haematologica
https://www.readbyqxmd.com/read/29438096/fda-approval-summary-lenalidomide-as-maintenance-therapy-after-autologous-stem-cell-transplant-in-newly-diagnosed-multiple-myeloma
#19
Elizabeth Dianne Pulte, Andrew Dmytrijuk, Lei Nie, Kirsten B Goldberg, Amy E McKee, Ann T Farrell, Richard Pazdur
On February 22, 2017, the U.S. Food and Drug Administration (FDA) granted approval for the use of lenalidomide as maintenance therapy after autologous hematopoietic stem cell transplantation (auto-HSCT) for patients with multiple myeloma. The approval was based on evidence from two randomized, blinded trials of maintenance lenalidomide versus placebo in patients with myeloma who had undergone auto-HSCT along with a third trial of lenalidomide versus no therapy. Each of the trials demonstrated superior progression-free survival for the patients treated with lenalidomide...
February 7, 2018: Oncologist
https://www.readbyqxmd.com/read/29436479/the-ontogeny-of-a-neutrophil-mechanisms-of-granulopoiesis-and-homeostasis
#20
REVIEW
Shelley M Lawrence, Ross Corriden, Victor Nizet
Comprising the majority of leukocytes in humans, neutrophils are the first immune cells to respond to inflammatory or infectious etiologies and are crucial participants in the proper functioning of both innate and adaptive immune responses. From their initial appearance in the liver, thymus, and spleen at around the eighth week of human gestation to their generation in large numbers in the bone marrow at the end of term gestation, the differentiation of the pluripotent hematopoietic stem cell into a mature, segmented neutrophil is a highly controlled process where the transcriptional regulators C/EBP-α and C/EBP-ε play a vital role...
June 2018: Microbiology and Molecular Biology Reviews: MMBR
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