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https://www.readbyqxmd.com/read/28637095/selective-cd28-blockade-results-in-superior-inhibition-of-donor-specific-t-follicular-helper-cell-and-antibody-responses-relative-to-ctla-4-ig
#1
I R Badell, G M La Muraglia, D Liu, M E Wagener, G Ding, M L Ford
Donor-specific antibodies (DSA) are a barrier to improved long-term outcomes following kidney transplantation. Costimulation blockade with CTLA-4-Ig has shown promise as a potential therapeutic strategy to control DSA. T follicular helper (Tfh) cells, a subset of CD4(+) T cells required for optimum antibody production, are reliant on the CD28 costimulatory pathway. We have previously shown that selective CD28 blockade leads to superior allograft survival through improved control of CD8(+) T cells relative to CTLA-4-Ig, but the impact of CD28-specific blockade on CD4(+) Tfh cells is unknown...
June 21, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28636926/enhanced-human-bone-marrow-mesenchymal-stromal-cell-adhesion-on-scaffolds-promotes-cell-survival-and-bone-formation
#2
Miryam Mebarki, Laura Coquelin, Pierre Layrolle, Séverine Battaglia, Marine Tossou, Philippe Hernigou, Hélène Rouard, Nathalie Chevallier
In order to induce an efficient bone formation with human bone marrow mesenchymal stromal cells (hBMSC) associated to a scaffold, it is crucial to determine the key points of the hBMSC action after in vivo transplantation as well as the appropriate features of a scaffold. To this aim we compared the hBMSC behavior when grafted onto two biomaterials allowing different bone potential in vivo. The cancellous devitalized Tutoplast®-processed bone (TPB) and the synthetic hydroxyapatite/β-tricalcium-phosphate (HA/βTCP) which give at 6 weeks 100% and 50% of bone formation respectively...
June 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28636901/the-effect-of-cd34-cell-telomere-length-and-htert-expression-on-the-outcome-of-autologous-cd34-cell-transplantation-in-patients-with-chronic-heart-failure
#3
Jasmina-Ziva Rozman, Maja Pohar Perme, Mojca Jez, Elvira Malicev, Metka Krasna, Srdjan Novakovic, Bojan Vrtovec, Primoz Rozman
Age-related telomere attrition in stem/progenitor cells may diminish their functional capacity and thereby impair the outcome of cell-based therapies. The aim of the present study was to investigate the effect of CD34(+) cell telomere length and hTERT expression on the clinical outcome of autologous CD34(+) cell transplantation. We studied 43 patients with cardiomyopathy. Their peripheral blood CD34(+) cells were mobilized with granulocyte colony-stimulating factor, enriched by immunoselection and delivered transendocardially...
June 18, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28636891/comparison-of-cyclophosphamide-thalidomide-dexamethasone-to-bortezomib-cyclophosphamide-dexamethasone-as-induction-therapy-for-multiple-myeloma-patients-in-brazil
#4
Suelen Vigolo, Joice Zuckermann, Rosane Isabel Bittencourt, Lúcia Silla, Diogo André Pilger
OBJECTIVE/BACKGROUND: Chemotherapy followed by autologous hematopoietic stem cell transplantation (HSCT) remains the standard treatment for multiple myeloma (MM). Thalidomide or bortezomib may be combined with cyclophosphamide and dexamethasone, in what are known as the CTD and VCD protocols, respectively. The objective of this study was to evaluate the clinical characteristics and response rates obtained with CTD and VCD, observing whether the inclusion of bortezomib to treat MM patients in Brazil increases therapeutic efficiency...
June 15, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28636890/memory-t-cells-a-helpful-guard-for-allogeneic-hematopoietic-stem-cell-transplantation-without-causing-graft-versus-host-disease
#5
REVIEW
Wei Huang, Nelson J Chao
Graft-versus-host disease (GVHD) is a major complication of allogeneic hematopoietic stem cell transplantation (AHSCT) and the major cause of nonrelapse morbidity and mortality of AHSCT. In AHSCT, donor T cells facilitate hematopoietic stem cell (HSC) engraftment, contribute to anti-infection immunity, and mediate graft-versus-leukemia (GVL) responses. However, activated alloreactive T cells also attack recipient cells in vital organs, leading to GVHD. Different T-cell subsets, including naïve T (TN) cells, memory T (TM) cells, and regulatory T (Treg) cells mediate different forms of GVHD and GVL; TN cells mediate severe GVHD, whereas TM cells do not cause GVHD, but preserve T-cell function including GVL...
June 13, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28636889/complications-of-hematopoietic-stem-transplantation-fungal-infections
#6
REVIEW
Ali S Omrani, Reem S Almaghrabi
Patients undergoing allogeneic hematopoietic stem cell transplantation (HSCT) are at increased risk of invasive fungal infections, especially during the early neutropenic phase and severe graft-versus-host disease. Mold-active prophylaxis should be limited to the highest risk groups. Empiric antifungal therapy for HSCT with persistent febrile neutropenia is associated with unacceptable response rates, unnecessary antifungal therapy, increased risk of toxicity, and inflated costs. Empiric therapy should not be a substitute for detailed work up to identify the cause of fever in such patients...
June 13, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28636627/plasma-cell-neoplasia-after-kidney-transplantation-french-cohort-series-and-review-of-the-literature
#7
Raphaël Kormann, Hélène François, Thibault Moles, Jacques Dantal, Nassim Kamar, Karine Moreau, Thomas Bachelet, Anne-Elisabeth Heng, Antoine Garstka, Charlotte Colosio, Didier Ducloux, Johnny Sayegh, Benjamin Savenkoff, Denis Viglietti, Rebecca Sberro, Eric Rondeau, Julie Peltier
Although post-transplant lymphoproliferative disorder (PTLD) is the second most common type of cancer in kidney transplantation (KT), plasma cell neoplasia (PCN) occurs only rarely after KT, and little is known about its characteristics and evolution. We included twenty-two cases of post-transplant PCN occurring between 1991 and 2013. These included 12 symptomatic multiple myeloma, eight indolent myeloma and two plasmacytomas. The median age at diagnosis was 56.5 years and the median onset after transplantation was 66...
2017: PloS One
https://www.readbyqxmd.com/read/28636347/the-structure-and-dynamics-of-alginate-gels-crosslinked-by-polyvalent-ions-probed-via-solid-state-nmr-spectroscopy
#8
Jiří Brus, Martina Urbanová, Jiri Czernek, Miroslava Pavelkova, Katerina Kubova, Jakub Vyslouzil, Sabina Abbrent, Rafal Konefal, Jiri Horsky, David Vetchy, Jan Vysloužil, Pavel Kulich
Alginate gels are an outstanding biomaterial widely applicable in tissue engineering, medicine, and pharmacy for cell transplantation, wound healing and efficient bioactive agent delivery, respectively. This contribution provides new and comprehensive insight into the atomic-resolution structure and dynamics of polyvalent ion-crosslinked alginate gels in microbead formulations. By applying various advanced solid-state NMR (ssNMR) spectroscopy techniques, we verified the homogenous distribution of the crosslinking ions in the alginate gels and the high degree of ion exchange...
June 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28636206/retinal-vascular-injuries-and-intravitreal-human-embryonic-stem-cell-derived-haemangioblasts
#9
Jin-Da Wang, Ying An, Jing-Shang Zhang, Xiu-Hua Wan, Wei Zhang, Robert Lanza, Shi-Jiang Lu, Jost B Jonas, Liang Xu
OBJECTIVE: To investigate whether intravitreally applied haemangioblasts (HB) derived from human embryonic stem cells (hESCs) are helpful for the repair of vascular damage caused in animals by an oxygen-induced retinopathy (OIR), by an induced diabetic retinopathy (DR) or by an induced retinal ischaemia with subsequent reperfusion. METHODS: Human embryonic stem cell-derived HBs were transplanted intravitreally into C57BL/6J mice (OIR model), into male Wistar rats with an induced DR and into male Wistar rats undergoing induced retinal ischaemia with subsequent reperfusion...
June 21, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28636192/intestinal-barrier-integrity-and-inflammatory-bowel-disease-stem-cell-based-approaches-to-regenerate-the-barrier
#10
REVIEW
Fredrik E O Holmberg, Jannie Pedersen, Peter Jørgensen, Christoffer Soendergaard, Kim B Jensen, Ole H Nielsen
Disruption of normal barrier function is a fundamental factor in the pathogenesis of inflammatory bowel disease, which includes increased epithelial cell death, modified mucus configuration, altered expression and distribution of tight junction-proteins, along with a decreased expression of antimicrobial peptides. Inflammatory bowel disease is associated with life-long morbidity for affected patients, and both the incidence and prevalence is increasing globally, resulting in substantial economic strain for society...
June 21, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28635985/experiences-of-women-with-gestational-trophoblastic-neoplasia-treated-with-high-dose-chemotherapy-and-stem-cell-transplantation-a-qualitative-study
#11
Kam Singh, Clare Warnock, Jane Ireson, Sarah Strickland, Delia Short, Michael J Seckl, Barry W Hancock
PURPOSE/OBJECTIVES: To explore the experiences of women with gestational trophoblastic neoplasia during and after treatment to understand their perspectives, priorities, and concerns.
. RESEARCH APPROACH: A descriptive, exploratory study using in-depth semistructured interviews.
. SETTING: All interviews were conducted in a quiet, designated room at Weston Park Hospital in Sheffield, South Yorkshire.
. PARTICIPANTS: Women with gestational trophoblastic neoplasia who had received stem cell transplantation from 2003 to 2013...
May 1, 2017: Oncology Nursing Forum
https://www.readbyqxmd.com/read/28635677/t-cell-manipulation-strategies-to-prevent-graft-versus-host-disease-in-haploidentical-stem-cell-transplantation
#12
REVIEW
Jayakumar Vadakekolathu, Sergio Rutella
Allogeneic haematopoietic stem cell transplantation (HSCT) from an human leukocyte antigen (HLA)-identical donor can be curative for eligible patients with non-malignant and malignant haematological disorders. HSCT from alternative donor sources, such as HLA-mismatched haploidentical donors, is increasingly considered as a viable therapeutic option for patients lacking HLA-matched donors. Initial attempts at haploidentical HSCT were associated with vigorous bidirectional alloreactivity, leading to unacceptably high rates of graft rejection and graft-versus-host disease (GVHD)...
June 21, 2017: Biomedicines
https://www.readbyqxmd.com/read/28635661/hypoxic-preconditioning-promotes-the-bioactivities-of-mesenchymal-stem-cells-via-the-hif-1%C3%AE-grp78-akt-axis
#13
Jun Hee Lee, Yeo Min Yoon, Sang Hun Lee
Mesenchymal stem cells (MSC) are ideal materials for stem cell-based therapy. As MSCs reside in hypoxic microenvironments (low oxygen tension of 1% to 7%), several studies have focused on the beneficial effects of hypoxic preconditioning on MSC survival; however, the mechanisms underlying such effects remain unclear. This study aimed to uncover the potential mechanism involving 78-kDa glucose-regulated protein (GRP78) to explain the enhanced MSC bioactivity and survival in hindlimb ischemia. Under hypoxia (2% O₂), the expression of GRP78 was significantly increased via hypoxia-inducible factor (HIF)-1α...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635650/the-application-of-heptamethine-cyanine-dye-dz-1-and-indocyanine-green-for-imaging-and-targeting-in-xenograft-models-of-hepatocellular-carcinoma
#14
Caiqin Zhang, Yong Zhao, He Zhang, Xue Chen, Ningning Zhao, Dengxu Tan, Hai Zhang, Changhong Shi
Near infrared fluorescence (NIRF) imaging has strong potential for widespread use in noninvasive tumor imaging. Indocyanine green (ICG) is the only Food and Drug Administration (FDA) -approved NIRF dye for clinical diagnosis; however, it is unstable and poorly targets tumors. DZ-1 is a novel heptamethine cyanine NIRF dye, suitable for imaging and tumor targeting. Here, we compared the fluorescence intensity and metabolism of DZ-1 and ICG. Additionally, we assayed their specificities and abilities to target tumor cells, using cultured hepatocellular carcinoma (HCC) cell lines, a nude mouse subcutaneous xenograft model of liver cancer, and a rabbit orthotopic transplantation model...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635356/simultaneous-abo-incompatible-living-donor-liver-transplantation-and-splenectomy-without-plasma-exchange-in-china-two-case-reports
#15
Guoyong Chen, Janjun Sun, Sidong Wei, Yongfeng Chen, Gaofeng Tang, Zhantao Xie, Huaen Xu, Janbin Chen, Huibo Zhao, Zhenhua Yuan, Weiwei Wang, Guangbo Liu, Bing Wang, Biao Niu
ABO-incompatible (ABO-i) living-donor liver transplantation (LDLT) is performed if an ABO-compatible graft cannot be obtained. However, a perfect desensitization protocol has not been established worldwide, especially for simultaneous ABO-i LDLT and splenectomy. We herein report two cases of ABO-i LDLT. To the best of our knowledge, this is the first case report of ABO-i LDLT in an adult patient in China. Splenectomy and T-cell-targeted immunosuppression (basiliximab) was used to overcome the blood group barrier in these recipients...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28634590/the-immune-epitope-database-how-data-are-entered-and-retrieved
#16
REVIEW
Ward Fleri, Kerrie Vaughan, Nima Salimi, Randi Vita, Bjoern Peters, Alessandro Sette
Easy access to a vast collection of experimental data on immune epitopes can greatly facilitate the development of therapeutics and vaccines. The Immune Epitope Database and Analysis Resource (IEDB) was developed to provide such a resource as a free service to the biomedical research community. The IEDB contains epitope and assay information related to infectious diseases, autoimmune diseases, allergic diseases, and transplant/alloantigens for humans, nonhuman primates, mice, and any other species studied. It contains T cell, B cell, MHC binding, and MHC ligand elution experiments...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28634486/%C3%AE-cell-replacement-strategies-the-increasing-need-for-a-%C3%AE-cell-dogma
#17
REVIEW
Andhira Vieira, Noémie Druelle, Fabio Avolio, Tiziana Napolitano, Sergi Navarro-Sanz, Serena Silvano, Patrick Collombat
Type 1 diabetes is an auto-immune disease resulting in the loss of pancreatic β-cells and, consequently, in chronic hyperglycemia. Insulin supplementation allows diabetic patients to control their glycaemia quite efficiently, but treated patients still display an overall shortened life expectancy and an altered quality of life as compared to their healthy counterparts. In this context and due to the ever increasing number of diabetics, establishing alternative therapies has become a crucial research goal. Most current efforts therefore aim at generating fully functional insulin-secreting β-like cells using multiple approaches...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28634334/image-guided-transplantation-of-single-cells-in-the-bone-marrow-of-live-animals
#18
Raphaël Turcotte, Clemens Alt, Judith M Runnels, Kyoko Ito, Juwell W Wu, Walid Zaher, Luke J Mortensen, Lev Silberstein, Daniel C Côté, Andrew L Kung, Keisuke Ito, Charles P Lin
Transplantation of a single hematopoietic stem cell is an important method for its functional characterization, but the standard transplantation protocol relies on cell homing to the bone marrow after intravenous injection. Here, we present a method to transplant single cells directly into the bone marrow of live mice. We developed an optical platform that integrates a multiphoton microscope with a laser ablation unit for microsurgery and an optical tweezer for cell micromanipulation. These tools allow image-guided single cell transplantation with high spatial control...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634317/the-role-of-frontline-autologous-stem-cell-transplantation-for-primary-plasma-cell-leukemia-a-retrospective-multicenter-study-kmm160
#19
Sung-Hoon Jung, Je-Jung Lee, Kihyun Kim, Cheolwon Suh, Dok Hyun Yoon, Chang-Ki Min, Sang Kyun Sohn, Chul Won Choi, Ho Sup Lee, Hyo Jung Kim, Ho-Jin Shin, Soo-Mee Bang, Sung-Soo Yoon, Seong Kyu Park, Ho-Young Yhim, Min Kyoung Kim, Jae-Cheol Jo, Yeung-Chul Mun, Jae Hoon Lee, Jin Seok Kim
Primary plasma cell leukemia (pPCL) is a rare and aggressive plasma cell neoplasm, with rapidly progressing clinical course. We evaluated the treatment status and survival outcomes of 69 Korean patients with pPCL. Of them, 59 patients were treated; 15 (25.4%) were treated initially with novel agent-based regimens with upfront autologous stem cell transplantation (ASCT), 7 (11.9%) with conventional chemotherapy with upfront ASCT, 21 (35.6%) with novel agent-based regimens only, and 16 (27.1%) were treated with conventional chemotherapy alone...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28634182/sf3b1-initiating-mutations-in-mds-with-ring-sideroblasts-target-lymphomyeloid-hematopoietic-stem-cells
#20
Teresa Mortera-Blanco, Marios Dimitriou, Petter S Woll, Mohsen Karimi, Edda Elvarsdottir, Simona Conte, Magnus Tobiasson, Monika Jansson, Iyadh Douagi, Matahi Moarii, Leonie Saft, Elli Papaemmanuil, Sten Eirik W Jacobsen, Eva Hellström-Lindberg
Mutations in the RNA splicing gene SF3B1 are found in more than 80% of patients with myelodysplastic syndrome with ring sideroblasts (MDS-RS). We investigated the origin of SF3B1 mutations within the bone marrow hematopoietic stem and progenitor cell compartments in patients with MDS-RS. Screening for recurrently mutated genes in the mononuclear cell fraction revealed mutations in SF3B1 in 39 of 40 cases (97.5%), combined with TET2 and DNMT3A in 11 (28%) and 6 (15%) patients, respectively. All recurrent mutations identified in mononuclear cells could be tracked back to the phenotypically defined hematopoietic stem cell (HSC) compartment in all investigated patients, and were also present in downstream myeloid and erythroid progenitor cells...
June 20, 2017: Blood
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