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https://www.readbyqxmd.com/read/28423578/endothelial-microparticles-delivering-microrna-155-into-t-lymphocytes-are-involved-in-the-initiation-of-acute-graft-versus-host-disease-following-allogeneic-hematopoietic-stem-cell-transplantation
#1
Ran Zhang, Xiaoxiao Wang, Mei Hong, Ting Luo, Miaomiao Zhao, Haorui Shen, Jun Fang, Xiaojie Li, Sibin Zang, Ping Chen, Dimin Nie, Peng Zheng, Qiuling Wu, Linghui Xia
Endothelial microparticles (EMPs) upregulation has been observed in acute graft-versus-host disease (aGVHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT). However, the role of EMPs remains unclear. We found that EMPs derived from TNF-α-stimulated human umbilical vein endothelial cells (EA.hy926) concentrated more microRNA-155 (miR-155) compared with maternal cells. The miR-155 levels in MPs from peripheral blood of aGVHD patients and mice were remarkably elevated and significantly higher than the levels in plasma...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414300/pd-l1-serves-as-a-double-agent-in-separating-gvl-from-gvhd
#2
Todd V Brennan, Yiping Yang
Allogeneic hematopoietic cell transplantation (HCT) represents a potentially curative treatment for a variety of hematologic malignancies due to the well-recognized graft-versus-leukemia/lymphoma (GVL) effect that is mediated by donor-derived alloreactive T cells. However, graft-versus-host disease (GVHD) is mediated by the same T cells and remains a significant clinical problem associated with substantial morbidity and mortality. In this issue of the JCI, Ni and colleagues used several murine models of GVHD to evaluate the effect of CD4+ T cell depletion on GVL versus GVHD and revealed that depletion of CD4+ T cells leads to the upregulation of PD-L1 by recipient tissues and donor CD8+ T cells...
April 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28414296/pd-l1-interacts-with-cd80-to-regulate-graft-versus-leukemia-activity-of-donor-cd8-t-cells
#3
Xiong Ni, Qingxiao Song, Kaniel Cassady, Ruishu Deng, Hua Jin, Mingfeng Zhang, Haidong Dong, Stephen Forman, Paul J Martin, Yuan-Zhong Chen, Jianmin Wang, Defu Zeng
Programmed death ligand-1 (PD-L1) interacts with programmed death-1 (PD-1) and the immunostimulatory molecule CD80 and functions as a checkpoint to regulate immune responses. The interaction of PD-L1 with CD80 alone has been shown to exacerbate the severity of graft-versus-host disease (GVHD), whereas costimulation of CD80 and PD-1 ameliorates GVHD. Here we have demonstrated that temporary depletion of donor CD4+ T cells early after hematopoietic cell transplantation effectively prevents GVHD while preserving strong graft-versus-leukemia (GVL) effects in allogeneic and xenogeneic murine GVHD models...
April 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28405514/regulatory-b-cells-promote-graft-versus-host-disease-prevention-and-maintain-graft-versus-leukemia-activity-following-allogeneic-bone-marrow-transplantation
#4
Yue Hu, Gan-Lin He, Xiang-Yu Zhao, Xiao-Su Zhao, Yu Wang, Lan-Ping Xu, Xiao-Hui Zhang, Xue-Zhong Yu, Kai-Yan Liu, Ying-Jun Chang, Xiao-Jun Huang
Regulatory B cells (Bregs) are involved in the pathogenesis of graft-versus-host disease (GVHD). However, whether Bregs can alleviate acute GVHD without compromising graft-versus-leukemia (GVL) effects remains unclear. Here, we evaluated the role of Bregs in acute GVHD and GVL activity in both a mouse model and a clinical cohort study. In the acute GVHD mouse model, co-transplantation of Bregs prevents onset through inhibiting Th1 and Th17 differentiation and expanding regulatory T cells. In the GVL mouse model, Bregs contributed to the suppression of acute GVHD but had no adverse effect on GVL activity...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28377595/gvl-effects-in-t-prolymphocytic-leukemia-evidence-from-mrd-kinetics-and-tcr-repertoire-analyses
#5
L Sellner, M Brüggemann, M Schlitt, H Knecht, D Herrmann, T Reigl, A Krejci, V Bystry, N Darzentas, M Rieger, S Dietrich, T Luft, A D Ho, M Kneba, P Dreger
No abstract text is available yet for this article.
April 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28375154/type-2-innate-lymphoid-cells-treat-and-prevent-acute-gastrointestinal-graft-versus-host-disease
#6
Danny W Bruce, Heather E Stefanski, Benjamin G Vincent, Trisha A Dant, Shannon Reisdorf, Hemamalini Bommiasamy, David A Serody, Justin E Wilson, Karen P McKinnon, Warren D Shlomchik, Paul M Armistead, Jenny P Y Ting, John T Woosley, Bruce R Blazar, Dietmar M W Zaiss, Andrew N J McKenzie, James M Coghill, Jonathan S Serody
Acute graft-versus-host disease (aGVHD) is the most common complication for patients undergoing allogeneic stem cell transplantation. Despite extremely aggressive therapy targeting donor T cells, patients with grade III or greater aGVHD of the lower GI tract, who do not respond to therapy with corticosteroids, have a dismal prognosis. Thus, efforts to improve understanding of the function of local immune and non-immune cells in regulating the inflammatory process in the GI tract during aGVHD are needed. Here, we demonstrate, using murine models of allogeneic BMT, that type 2 innate lymphoid cells (ILC2s) in the lower GI tract are sensitive to conditioning therapy and show very limited ability to repopulate from donor bone marrow...
April 4, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28371460/hematopoietic-stem-cell-transplantation-and-cellular-therapy
#7
REVIEW
H-J Kolb
Allogeneic stem cell transplantation is a form of immunotherapy that has increased the chances of survival for patients with relapsed leukemia and high risk leukemia in remission. The major obstacles are graft-vs-host disease (GVHD) involving vital organs and infections. A most efficacious prophylaxis of GVHD is by depleting of T cells from the graft. However, problems of T-depleted transplants are rejection, slow recovery of the immune system and high incidence of relapse of leukemia and myeloma. The major problem of allogeneic transplantation is the separation of a graft-vs-leukemia (GVL) effect from GVHD...
May 2017: HLA
https://www.readbyqxmd.com/read/28219939/peroxiredoxin-1-prx1-is-a-dual-function-enzyme-by-possessing-cys-independent-catalase-like-activity
#8
Cen-Cen Sun, Wei-Ren Dong, Tong Shao, Jiang-Yuan Li, Jing Zhao, Li Nie, Li-Xin Xiang, Guan Zhu, Jian-Zhong Shao
Peroxiredoxin (Prx) was previously known as a Cys-dependent thioredoxin. However, we unexpected observed that Prx1 from the green spotted puffer fish Tetraodon nigroviridis (TnPrx1) was able to reduce H2O2 in a manner independent on the Cys peroxidation and reductants. This study aimed to validate the novel function for Prx1, delineate the biochemical features and explore its antioxidant role in cells. We have confirmed that Prx1 from the puffer fish and humans truly possesses a catalase-like activity that is independent of Cys residues and reductants, but dependent on iron...
February 20, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28219835/marked-in-vivo-donor-regulatory-t-cell-expansion-via-interleukin-2-and-tl1a-ig-stimulation-ameliorates-graft-versus-host-disease-but-preserves-graft-versus-leukemia-in-recipients-after-hematopoietic-stem-cell-transplantation
#9
Dietlinde Wolf, Henry Barreras, Cameron S Bader, Sabrina Copsel, Casey O Lightbourn, Brent J Pfeiffer, Norman H Altman, Eckhard R Podack, Krishna V Komanduri, Robert B Levy
Regulatory T cells (Tregs) are critical for self-tolerance. Although adoptive transfer of expanded Tregs limits graft-versus-host disease (GVHD) after hematopoietic stem cell transplantation (HSCT), ex vivo generation of large numbers of functional Tregs remains difficult. Here, we demonstrate that in vivo targeting of the TNF superfamily receptor TNFRSF25 using the TL1A-Ig fusion protein, along with IL-2, resulted in transient but massive Treg expansion in donor mice, which peaked within days and was nontoxic...
February 20, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28183349/hif-1%C3%AE-inhibitor-echinomycin-reduces-acute-graft-versus-host-disease-and-preserves-graft-versus-leukemia-effect
#10
Yushi Yao, Lei Wang, Jihao Zhou, Xinyou Zhang
BACKGROUND: Acute graft-versus-host disease (aGVHD) remains a major obstacle against favorable clinical outcomes following allogeneic hematopoietic stem cell transplantation (allo-HSCT). T helper cells including Th17 play key roles in aGVHD pathogenesis. Donor regulatory T cell (Tregs) adoptive therapy reduces aGVHD without weakening graft-versus-leukemia effect (GVL) in both mouse and human, although the purification and ex vivo expansion of Tregs in clinical scenarios remain costly and technically demanding...
February 10, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28168228/changes-in-the-first-pass-success-rate-with-the-glidescope-video-laryngoscope-and-direct-laryngoscope-a-ten-year-observational-study-in-two-academic-emergency-departments
#11
Joon Ki Lee, Hyunggu Kang, Hyuk Joong Choi
OBJECTIVE: The aim of this study was to assess the success rate of the GlideScope video laryngoscope (GVL) and direct laryngoscope (DL) over ten years in two academic emergency departments. METHODS: We used adult intubation data using DL and GVL collected from airway management registries at two academic emergency departments. We analyzed changes in first-pass success (FPS) rate by device and operator training level. We conducted a multivariate logistic regression analysis to predict the FPS according to time period...
December 2016: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/28161625/valorization-of-bamboo-by-%C3%AE-valerolactone-acid-water-to-produce-digestible-cellulose-degraded-sugars-and-lignin
#12
Shu-Xian Li, Ming-Fei Li, Ping Yu, Yong-Ming Fan, Jia-Nan Shou, Run-Cang Sun
A novel pretreatment process was developed to achieve valorization of bamboo components into digestible cellulose, degraded sugars and lignin. In this case, bamboo was pretreated with 60% γ-valerolactone (GVL)/40% water containing 0.05mol/L H2SO4, yielding solid fraction rich in cellulose. The resulting liquor was further treated with the addition of NaCl and ultrasound, resulting in water phase rich in degraded sugars and GVL phase containing lignin, which was easy to recover. Results showed that the enzymatic hydrolysis was enhanced by 6...
April 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28139337/graft-versus-leukemia-effect-with-a-wt1-specific-t-cell-response-induced-by-azacitidine-and-donor-lymphocyte-infusions-after-allogeneic-hematopoietic-stem-cell-transplantation
#13
Tatsunori Ishikawa, Nobuharu Fujii, Masahide Imada, Michinori Aoe, Yusuke Meguri, Tomoko Inomata, Hiromi Nakashima, Keiko Fujii, Shohei Yoshida, Hisakazu Nishimori, Ken-Ichi Matsuoka, Eisei Kondo, Yoshinobu Maeda, Mitsune Tanimoto
BACKGROUND: Azacitidine (Aza) and donor lymphocyte infusion (DLI) therapy has recently been reported as an effective salvage therapy for relapsed acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). Despite the high response rate and relatively long period of remission, most patients relapse again. The immunologic mechanism of the response and limited efficacy remain unknown. CASE REPORT: Aza + DLI therapy was performed for a patient with therapy-related MDS (t-MDS), who had relapsed after allogeneic peripheral blood stem cell transplantation...
January 27, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28105353/isolated-extramedullary-cutaneous-relapse-despite-concomitant-severe-graft-vs-host-disease-and-tissue-chimerism-analysis-in-a-patient-with-acute-lymphoblastic-leukemia-after-allogeneic-hematopoietic-stem-cell-transplantation-a-case-report
#14
Bulent Kantarcioglu, Huseyin Saffet Bekoz, Yeliz Duvarci Ogret, Asli Cakir, Demet Kivanc, Fatma Savran Oguz, Deniz Sargin
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potentially curative treatment option for patients with acute lymphoblastic leukemia (ALL). The curative potential of allo-HSCT for ALL is, in part, due to the graft-vs.-leukemia (GVL) effect, in addition to the intensive conditioning chemo-radiotherapy. However, relapse remains the major cause of treatment failure following allo-HSCT for ALL. In the allo-HSCT setting, testing for genetic markers of hematopoietic chimerism has become a part of the routine diagnostic program...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28067665/selective-graft-versus-leukemia-depends-on-magnitude-and-diversity-of-the-alloreactive-t-cell-response
#15
Cornelis A M van Bergen, Simone A P van Luxemburg-Heijs, Liesbeth C de Wreede, Matthijs Eefting, Peter A von dem Borne, Peter van Balen, Mirjam H M Heemskerk, Arend Mulder, Fransiscus H J Claas, Marcelo A Navarrete, Wilhelmina M Honders, Caroline E Rutten, Hendrik Veelken, Inge Jedema, Constantijn J M Halkes, Marieke Griffioen, J H Frederik Falkenburg
Patients with leukemia who receive a T cell-depleted allogeneic stem cell graft followed by postponed donor lymphocyte infusion (DLI) can experience graft-versus-leukemia (GVL) reactivity, with a lower risk of graft-versus-host disease (GVHD). Here, we have investigated the magnitude, diversity, and specificity of alloreactive CD8 T cells in patients who developed GVL reactivity after DLI in the absence or presence of GVHD. We observed a lower magnitude and diversity of CD8 T cells for minor histocompatibility antigens (MiHAs) in patients with selective GVL reactivity without GVHD...
February 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27982520/efficient-hydrogenation-of-biomass-oxoacids-to-lactones-by-using-nhc-iridium-coordination-polymers-as-solid-molecular-catalysts
#16
Yaoqi Liu, Zheming Sun, Changyu Huang, Tao Tu
A series of NHC-iridium coordination polymers have proven to be robust, efficient and recyclable solid molecular catalysts toward the hydrogenation of biomass levulinic acid (LA) to γ-valerolactone. Along with quantitative yields attained at 0.01 mol % catalyst loading under 50 atm of H2 , the solid molecular catalyst was readily recovered and reused for 12 runs without obvious loss of the selectivity and activity. Remarkably, up to 1.2×10(5)  TON, an unprecedented value could be achieved in this important transformation...
December 16, 2016: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/27941777/gvl-effects-in-t-prolymphocytic-leukemia-evidence-from-mrd-kinetics-and-tcr-repertoire-analyses
#17
L Sellner, M Brüggemann, M Schlitt, H Knecht, D Herrmann, T Reigl, A Krejci, V Bystry, N Darzentas, M Rieger, S Dietrich, T Luft, A D Ho, M Kneba, P Dreger
Allogeneic stem cell transplantation (alloSCT) is used for treating patients with T-prolymphocytic leukemia (T-PLL). However, direct evidence of GvL activity in T-PLL is lacking. We correlated minimal residual disease (MRD) kinetics with immune interventions and T-cell receptor (TCR) repertoire diversity alterations in patients after alloSCT for T-PLL. Longitudinal quantitative MRD monitoring was performed by clone-specific real-time PCR of TCR rearrangements (n=7), and TCR repertoire diversity assessment by next-generation sequencing (NGS; n=3) Although post-transplant immunomodulation (immunosuppression tapering or donor lymphocyte infusions) resulted in significant reduction (>1 log) of MRD levels in 7 of 10 occasions, durable MRD clearance was observed in only two patients...
April 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/27913172/efficient-catalytic-system-for-the-direct-transformation-of-lignocellulosic-biomass-to-furfural-and-5-hydroxymethylfurfural
#18
Luxin Zhang, Guoyun Xi, Jiaxin Zhang, Hongbing Yu, Xiaochang Wang
A feasible approach was developed for the co-production of 5-hydroxymethylfurfural (5-HMF) and furfural from corncob via a new porous polytriphenylamine-SO3H (SPTPA) solid acid catalyst in lactone solvents. XRD, SEM, XPS, N2 adsorption-desorption, elemental analysis, TG-DTA, acid-base titration and FTIR spectroscopy techniques were used to characterize the catalyst. This study demonstrates and optimizes the catalytic performance of SPTPA and solvent selection. SPTPA was found to exhibit superior catalytic ability in γ-valerolactone (GVL)...
January 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27890259/how-important-is-nk-alloreactivity-and-kir-in-allogeneic-transplantation
#19
REVIEW
Brian C Shaffer, Katharine C Hsu
Relapse of acute myelogenous leukemia (AML) after allogeneic hematopoietic cell transplantation (allo HCT) is a major cause of death in transplant recipients. Efforts to control relapse by promoting donor T-cell alloreactivity, such as withdrawal of immune suppression or donor lymphocyte infusions, are limited by the propensity to induce graft versus host disease (GVHD) and by inadequate efficacy. Therefore, options for AML patients who have relapsed AML after allo HCT are few and outcomes are poor. Similar to T-cells, natural killer (NK) cells have potent anti-leukemia effector capacity, and yet unlike T-cells, NK cells do not mediate GVHD...
December 2016: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/27881982/milestones-of-hematopoietic-stem-cell-transplantation-from-first-human-studies-to-current-developments
#20
REVIEW
Mateja Kralj Juric, Sakhila Ghimire, Justyna Ogonek, Eva M Weissinger, Ernst Holler, Jon J van Rood, Machteld Oudshoorn, Anne Dickinson, Hildegard T Greinix
Since the early beginnings, in the 1950s, hematopoietic stem cell transplantation (HSCT) has become an established curative treatment for an increasing number of patients with life-threatening hematological, oncological, hereditary, and immunological diseases. This has become possible due to worldwide efforts of preclinical and clinical research focusing on issues of transplant immunology, reduction of transplant-associated morbidity, and mortality and efficient malignant disease eradication. The latter has been accomplished by potent graft-versus-leukemia (GvL) effector cells contained in the stem cell graft...
2016: Frontiers in Immunology
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