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https://www.readbyqxmd.com/read/28648733/-is-transplantation-an-alternative-to-the-transfusional-impasse-in-sickle-cell-disease
#1
F Bernaudin, M Kuentz
Sickle cell disease is the most frequent genetic disease in France, concerning 400 newborns each year. The management of these Afro-Caribbean patients requires frequent transfusions from Caucasian donors. Due to important erythroid antigenic differences between Caucasian and African, the prevalence of allo-immunization is high in this population with a risk of transfusional impasse. Allogeneic stem cell transplantation is the only curative treatment for this disease and the replacement of red cells and lymphocytes of the sickle cell patient by those of the donor can also resolve the transfusional impasse...
June 22, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28581467/directionality-of-non-permissive-hla-dpb1-t-cell-epitope-group-mismatches-does-not-improve-clinical-risk-stratification-in-8-8-matched-unrelated-donor-hematopoietic-cell-transplantation
#2
K Fleischhauer, K W Ahn, H L Wang, L Zito, P Crivello, C Müller, M Verneris, B E Shaw, J Pidala, M Oudshorn, S J Lee, S R Spellman
In 8/8 HLA-matched unrelated donor (UD) hematopoietic cell transplants (HCT), HLA-DPB1 mismatches between alleles from different T-cell epitope (TCE) groups (non-permissive mismatches) are associated with significantly higher risks of mortality compared with those between alleles from the same TCE group (permissive mismatches); however, the relevance of mismatch directionality, that is (host vs graft (uni-directional HvG), graft vs host (uni-directional GvH) or both (bi-directional) in the non-permissive setting is unknown...
June 5, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28432872/human-effector-memory-t-helper-cells-engage-with-mouse-macrophages-and-cause-graft-versus-host-like-pathology-in-skin-of-humanized-mice-used-in-a-nonclinical-immunization-study
#3
Balasai Sundarasetty, Valery Volk, Sebastian J Theobald, Susanne Rittinghausen, Dirk Schaudien, Vanessa Neuhaus, Constanca Figueiredo, Andreas Schneider, Laura Gerasch, Adele Mucci, Thomas Moritz, Constantin von Kaisenberg, Loukia M Spineli, Katherina Sewald, Armin Braun, Henning Weigt, Arnold Ganser, Renata Stripecke
Humanized mice engrafted with human hematopoietic stem cells and developing functional human T-cell adaptive responses are in critical demand to test human-specific therapeutics. We previously showed that humanized mice immunized with long-lived induced-dendritic cells loaded with the pp65 viral antigen (iDCpp65) exhibited a faster development and maturation of T cells. Herein, we evaluated these effects in a long-term (36 weeks) nonclinical model using two stem cell donors to assess efficacy and safety. Relative to baseline, iDCpp65 immunization boosted the output of effector memory CD4(+) T cells in peripheral blood and lymph nodes...
June 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28399164/sequential-monitoring-of-lymphocyte-subsets-and-of-t-and-b-cell-neogenesis-indexes-to-identify-time-varying-immunologic-profiles-in-relation-to-graft-versus-host-disease-and-relapse-after-allogeneic-stem-cell-transplantation
#4
Cristina Skert, Simone Perucca, Marco Chiarini, Viviana Giustini, Alessandra Sottini, Claudia Ghidini, Stefano Martellos, Federica Cattina, Benedetta Rambaldi, Valeria Cancelli, Michele Malagola, Alessandro Turra, Nicola Polverelli, Simona Bernardi, Luisa Imberti, Domenico Russo
T and B lymphocyte subsets have been not univocally associated to Graft-versus-host disease (GVHD) and relapse of hematological malignancies after stem cell transplantation (SCT). Their sequential assessment together with B and T cell neogenesis indexes has been not thoroughly analysed in relation to these changing and interrelated immunologic/clinic events yet. Lymphocyte subsets in peripheral blood (PB) and B and T cell neogenesis indexes were analysed together at different time points in a prospective study of 50 patients...
2017: PloS One
https://www.readbyqxmd.com/read/28239678/bidirectional-intragraft-alloreactivity-drives-the-repopulation-of-human-intestinal-allografts-and-correlates-with-clinical-outcome
#5
Julien Zuber, Brittany Shonts, Sai-Ping Lau, Aleksandar Obradovic, Jianing Fu, Suxiao Yang, Marion Lambert, Shana Coley, Joshua Weiner, Joseph Thome, Susan DeWolf, Donna L Farber, Yufeng Shen, Sophie Caillat-Zucman, Govind Bhagat, Adam Griesemer, Mercedes Martinez, Tomoaki Kato, Megan Sykes
A paradigm in transplantation states that graft-infiltrating T cells are largely non-alloreactive "bystander" cells. However, the origin and specificity of allograft T cells over time has not been investigated in detail in animals or humans. Here, we use polychromatic flow cytometry and high throughput TCR sequencing of serial biopsies to show that gut-resident T cell turnover kinetics in human intestinal allografts are correlated with the balance between intra-graft host-vs-graft (HvG) and graft-vs-host (GvH) reactivities and with clinical outcomes...
October 2016: Science Immunology
https://www.readbyqxmd.com/read/28205066/a-single-center-analysis-of-chronic-graft-versus-host-disease-free-relapse-free-survival-after-alternative-donor-stem-cell-transplantation-in-children-with-hematological-malignancies
#6
Jiro Inagaki, Reiji Fukano, Maiko Noguchi, Jun Okamura
We assessed the clinical outcomes of allogeneic hematopoietic stem cell transplantation (SCT) from alternative donors for pediatric patients with hematological malignancies, defining graft-versus-host disease (GVHD)-free, relapse-free survival (GRFS) as a composite endpoint. We also defined chronic GVHD-free, relapse-free survival (cGRFS) as survival without severe chronic GVHD, relapse, or death. The probabilities of 2-year disease-free survival from a human leukocyte antigen (HLA) matched unrelated donor (n = 57), related donor with HLA-1 antigen mismatch in the graft-versus-host direction (1Ag-GvH-MMRD, n = 28), and unrelated umbilical cord blood (n = 35) were 52...
May 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/27919187/diagnostic-value-of-serum-ferritin-and-the-risk-factors-and-cytokine-profiles-of-hemophagocytic-syndrome-following-allogeneic-hematopoietic-cell-transplantation
#7
Satoru Nanno, Hideo Koh, Yasuhiro Nakashima, Takako Katayama, Hiroshi Okamura, Shiro Koh, Takuro Yoshimura, Mitsutaka Nishimoto, Yoshiki Hayashi, Mika Nakamae, Asao Hirose, Takahiko Nakane, Masayuki Hino, Hirohisa Nakamae
To examine the diagnostic value of serum ferritin, the associated risk factors, and cytokine profiles of hemophagocytic syndrome (HPS) following allogeneic hematopoietic cell transplantation (allo-HCT), we retrospectively analyzed data from patients undergoing allo-HCT between 2006 and 2012. Of 223 eligible patients, 18 patients developed HPS. A serum ferritin level above 30,000 μg/l was highly specific for the detection of HPS (specificity, 93%). The one-year survival rate for HPS was significantly lower than that of non-HPS patients (37...
December 6, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27872059/genome-wide-minor-histocompatibility-matching-as-related-to-the-risk-of-graft-versus-host-disease
#8
Paul J Martin, David M Levine, Barry E Storer, Edus H Warren, Xiuwen Zheng, Sarah C Nelson, Anajane G Smith, Bo K Mortensen, John A Hansen
The risk of acute graft-versus-host disease (GVHD) is higher after allogeneic hematopoietic cell transplantation (HCT) from unrelated donors as compared with related donors. This difference has been explained by increased recipient mismatching for major histocompatibility antigens or minor histocompatibility antigens. In the current study, we used genome-wide arrays to enumerate single nucleotide polymorphisms (SNPs) that produce graft-versus-host (GVH) amino acid coding differences between recipients and donors...
February 9, 2017: Blood
https://www.readbyqxmd.com/read/27543159/donor-lymphocyte-infusion-mediated-graft-versus-host-responses-in-a-preclinical-swine-model-of-haploidentical-hematopoietic-cell-transplantation
#9
Raimon Duran-Struuck, Abraham J Matar, Rebecca L Crepeau, Alexander G S Teague, Benjamin M Horner, Vimukthi Pathiraja, Thomas R Spitzer, Jay A Fishman, Roderick T Bronson, David H Sachs, Christene A Huang
We previously described successful hematopoietic stem cell engraftment across MHC barriers in miniature swine without graft-versus-host disease (GVHD) using novel reduced-intensity conditioning regimens consisting of partial transient recipient T cell-depletion, thymic or low-dose total body irradiation, and a short course of cyclosporine A. Here we report that stable chimeric animals generated with these protocols are strongly resistant to donor leukocyte infusion (DLI)-mediated GVH effects. Of 33 total DLIs in tolerant chimeras at clinical doses, 21 failed to induce conversion to full donor hematopoietic chimerism or cause GVHD...
November 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/27486886/combination-of-il-2-rapamycin-dna-methyltransferase-and-histone-deacetylase-inhibitors-for-the-expansion-of-human-regulatory-t-cells
#10
Makoto Miyara, Driss Chader, Aude Burlion, Jérémie Goldstein, Delphine Sterlin, Françoise Norol, Hélène Trebeden-Nègre, Laetitia Claër, Shimon Sakaguchi, Gilles Marodon, Zahir Amoura, Guy Gorochov
FOXP3+ regulatory T cell (Treg) based cellular therapies represent promising therapeutic options in autoimmunity, allergy, transplantation and prevention of Graft Versus Host (GVH) Disease. Among human FOXP3-expressing CD4+T cells, only the CD45RA+ naïve Treg (nTreg) subset is suitable for in vitro expansion. However, FOXP3 expression decays in cells using currently described culture protocols. Rapamycin alone was not able to prevent FOXP3 loss in nTregs cells, as only a half of them maintained FOXP3 expression after 14 days of culture...
July 28, 2016: Oncotarget
https://www.readbyqxmd.com/read/27471614/cd8-tregs-promote-gvhd-prevention-and-overcome-the-impaired-gvl-effect-mediated-by-cd4-tregs-in-mice
#11
Jessica Heinrichs, Jun Li, Hung Nguyen, Yongxia Wu, David Bastian, Anusara Daethanasanmak, M-Hanief Sofi, Steven Schutt, Chen Liu, Junfei Jin, Brian Betts, Claudio Anasetti, Xue-Zhong Yu
Adoptive natural regulatory T cell (nTreg) therapy has improved the outcome for patients suffering from graft-versus-host disease (GVHD) following allogeneic hematopoietic cell transplantation (Allo-HCT). However, fear of broad immune suppression and subsequent dampening of beneficial graft-versus-leukemia (GVL) responses remains a challenge. To address this concern, we generated alloreactive induced Tregs (iTregs) from resting CD4(+) or CD8(+) T cells and tested their ability to suppress GVH and maintain GVL responses...
June 2016: Oncoimmunology
https://www.readbyqxmd.com/read/27152919/cytomegalovirus-specific-t-cells-isolated-by-ifn-%C3%AE-secretion-assay-do-not-induce-significant-graft-versus-host-reactions-in-vitro
#12
Marsela Qesari, Anne Richter, Justyna Ogonek, Eva Mischak-Weissinger, Xiao-Nong Wang, Anne M Dickinson
BACKGROUND: Graft-versus-host (GvH) disease (GvHD) remains a serious concern for patients undergoing antiviral cellular therapy. Despite the major improvements in cellular immunotherapy, the immunogenicity of virus-specific T cells has not yet been fully defined. This present study aims to examine how cytomegalovirus (CMV)-specific cytotoxic T lymphocytes (CTLs) respond to allogeneic antigen stimulation and whether they give rise to GvHD target tissue damage. METHODS: Cytomegalovirus-specific CTLs were isolated by the IFN-γ secretion assay (gamma-catch) from healthy seropositive volunteers and expanded in vitro...
November 2016: Transplantation
https://www.readbyqxmd.com/read/26902992/the-role-of-danger-signals-and-ectonucleotidases-in-acute-graft-versus-host-disease
#13
REVIEW
Petya Apostolova, Robert Zeiser
Allogeneic hematopoietic cell transplantation (allo-HCT) represents the only curative treatment approach for many patients with benign or malignant diseases of the hematopoietic system. However, post-transplant morbidity and mortality are significantly increased by the development of acute graft-versus-host disease (GvHD). While alloreactive T cells act as the main cellular mediator of the GvH reaction, recent evidence suggests a critical role of the innate immune system in the early stages of GvHD initiation...
November 2016: Human Immunology
https://www.readbyqxmd.com/read/26890326/outcomes-and-predictors-of-rebleeding-after-2-octyl-cyanoacrylate-injection-in-acute-gastric-variceal-hemorrhage
#14
Badr Al-Bawardy, Emmanuel C Gorospe, Atif Saleem, Navtej S Buttar, Louis M Wong Kee Song
BACKGROUND AND AIM: Endoscopic injection of 2-octyl cyanoacrylate (2-OCA) is used on an off-label basis for gastric variceal hemorrhage (GVH) in the United States. We assessed the efficacy, safety, and predictors of rebleeding after gastric variceal obturation (GVO) with 2-OCA in patients with acute GVH. MATERIALS AND METHODS: A retrospective analysis was performed of patients with GVH who underwent 2-OCA injection for GVO over a 15-year period. Rates of acute hemostasis, predictors of rebleeding, and cyanoacrylate-related adverse events were assessed...
July 2016: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/26456486/-gas-permeable-scleral-lens-for-management-of-severe-keratoconjunctivitis-sicca-secondary-to-chronic-graft-versus-host-disease
#15
P Rossi, A Delcampe, J Gueudry, A Duncombe, E Gabison, S Doan, M Muraine
INTRODUCTION: Graft-versus-host disease is a major complication of allogeneic hematopoietic stem cell transplantation. Severe keratoconjunctivitis sicca is common in patients with chronic GVH disease. The goal of this study was to evaluate the safety and efficacy of a gas-permeable scleral lens in the management of severe dry eye disease associated with chronic GVH. PATIENTS AND METHODS: This is a retrospective study from June 2009 to November 2013. Patients fitted with scleral lenses for severe keratoconjunctivitis sicca associated with chronic GVH were included...
November 2015: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/26415557/negative-impact-of-unidirectional-host-versus-graft-killer-cell-immunoglobulin-like-receptor-ligand-mismatch-on-transplantation-outcomes-after-unmanipulated-haploidentical-peripheral-blood-stem-cell-transplantation-for-acute-myeloid-leukemia
#16
Seung-Ah Yahng, Young-Woo Jeon, Jae-Ho Yoon, Seung-Hwan Shin, Sung-Eun Lee, Byung-Sik Cho, Ki-Seong Eom, Yoo-Jin Kim, Seok Lee, Chang-Ki Min, Seok-Goo Cho, Dong-Wook Kim, Jong-Wook Lee, Woo-Sung Min, Hee-Je Kim
This study explored the influence of mismatched inhibitory killer cell immunoglobulin-like receptor (KIR) ligands on the outcome of haploidentical transplantation using T cell-replete, granulocyte colony-stimulating factor-mobilized peripheral blood stem cells in adult patients with acute myeloid leukemia (AML). Three groups were examined: unidirectional graft-versus-host KIR ligand mismatched (GVH-KIR-MM; n = 33), bidirectional KIR ligand matched (KIR-M; n = 41), and unidirectional host-versus-graft KIR ligand mismatched (HVG-KIR-MM; n = 26)...
February 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/26392781/prevention-of-invasive-fungal-infections-in-immunocompromised-patients-the-role-of-delayed-release-posaconazole
#17
REVIEW
Ahmet Soysal
Posaconazole is a triazole antifungal agent that has broad-spectrum activity against many yeasts and filamentous fungi, including Candida species, Cryptococcus neoformans, Aspergillus species, and Zygomycetes. This drug has been approved for the prevention of invasive fungal infections in patients with neutropenia and for the treatment of invasive fungal infections in hematopoietic stem cell transplant recipients with graft-versus-host disease. Studies on the clinical efficacy, safety, tolerability, and cost-effectiveness of posaconazole therapy were performed using the oral suspension form of the drug...
2015: Infection and Drug Resistance
https://www.readbyqxmd.com/read/26390726/-molecular-analysis-of-immunoglobulin-genes-in-the-tumor-b-cells-in-splenic-marginal-zone-lymphoma
#18
U L Julakyan, B V Biderman, E G Gemdzhian, A B Sudarikov, V G Savchenko
AIM: To determine the immunoglobulin variable heavy chain (gVH) genes and their somatic mutations and to compare these data with the clinical and laboratory parameters of patients and the outcomes of the disease. SUBJECTS AND METHODS: The investigation enrolled 24 patients (9 men and 15 women whose age was 32 to 77 years (median age, 60 years) with splenic marginal zone B-cell lymphoma (SMZBCL). The latter was diagnosed on the basis of histological and immunohistochemical examinations of a bone marrow trephine biopsy specimen, immunophenotyping of peripheral lymphoid cells or bone marrow aspirates...
2015: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/26390167/challenges-and-opportunities-of-allogeneic-donor-derived-car-t-cells
#19
REVIEW
Yinmeng Yang, Elad Jacoby, Terry J Fry
PURPOSE OF REVIEW: As T cells engineered with chimeric antigen receptors (CARs) are entering advanced phases of clinical trial testing with promising results, the potential implications of use in an allogeneic environment are emerging as an important consideration. This review discusses the use of allogeneic CAR therapy, the potential effects of T-cell receptor (TCR) signaling on CAR T-cell efficacy, and the potential for TCR elimination to generate an off-the-shelf product. RECENT FINDINGS: The majority of preclinical and clinical data regarding allogeneic T cells are focused on safety of their use given the potential for graft-versus-host disease (GVHD) mediated by the T-cell receptor expressed with the introduced CAR...
November 2015: Current Opinion in Hematology
https://www.readbyqxmd.com/read/26390165/donor-derived-cd19-targeted-t-cells-in-allogeneic-transplants
#20
REVIEW
Chiara Francesca Magnani, Andrea Biondi, Ettore Biagi
PURPOSE OF REVIEW: Allogeneic hematopoietic stem cell transplantation (HSCT) is still partially ineffective in curing high-risk hematological malignancies, with estimates of relapse rates ranging from 40 to 50%. The purpose of this review is to discuss the emerging therapeutic options for patients with relapsed disease following HSCT based on adoptive immunotherapy using donor-derived T cells genetically engineered to express CD19-specific chimeric antigen receptors (CARs). RECENT FINDINGS: Adoptive cell therapy (ACT) with CAR-modified T cells represents an attractive therapeutic option for further enhancing the graft-versus-leukemia effect...
November 2015: Current Opinion in Hematology
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