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https://www.readbyqxmd.com/read/28920716/transposons-moving-forward-from-preclinical-studies-to-clinical-trials
#1
Jaitip Tipanee, Thierry VandenDriessche, Marinee K Chuah
Transposons have emerged as promising vectors for gene therapy that can potentially overcome some of the limitations of commonly used viral vectors. Transposons stably integrate into the target cell genome, enabling persistent expression of therapeutic genes. Transposons have evolved from being used as basic tools in biomedical research to bona fide therapeutics. Currently, the most promising transposons for gene therapy applications are derived from Sleeping Beauty (SB) or piggyBac (PB). Stable transposition requires co-delivery of the transposon DNA with the corresponding transposase gene, mRNA, or protein...
August 22, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28912137/enhanced-cancer-immunotherapy-by-chimeric-antigen-receptor-modified-t-cells-engineered-to-secrete-checkpoint-inhibitors
#2
Pin Wang, Si Li, Natnaree Siriwon, Xiaoyang Zhang, Shuai Yang, Tao Jin, Feng He, Yu Jeong Kim, John Mac, Zhengfei Lu, Sijie Wang, Xiaolu Han
PURPOSE: Despite favorable responses of CAR-engineered T cell therapy in patients with hematologic malignancies, the outcome has been far from satisfactory in the treatment of solid tumors, partially owing to the development of an immunosuppressive tumor microenvironment. To overcome this limitation, we engineered CAR-T cells secreting checkpoint inhibitors (CPIs) targeting PD-1 (CAR.αPD1-T) and evaluated their efficacy in a human lung carcinoma xenograft mouse model. EXPERIMENTAL DESIGN: To evaluate the effector function and expansion capacity of CAR...
September 14, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28901790/anti-cd123-chimeric-antigen-receptor-t-cells-cart-an-evolving-treatment-strategy-for-hematological-malignancies-and-a-potential-ace-in-the-hole-against-antigen-negative-relapse
#3
Katherine D Cummins, Saar Gill
Chimeric antigen receptor-modified T-cells (CART) are a potent and targeted immunotherapy which have induced remissions in some patients with chemotherapy refractory or relapsed (RR) hematologic malignancies. Hundreds of patients have now been treated worldwide with anti-CD19 CART cells, with complete response rates of up to 90%. CART therapy has a unique toxicity profile, and unfortunately not all responses are durable. Treatment failure occurs via two main routes - by loss of the CART cell population, or relapse with antigen loss...
September 13, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28900984/-targeted-therapy-combined-with-immunotherapy-in-gastrointestinal-stromal-tumor-a-new-era-of-hope-and-challenges
#4
Wenyi Zhao, Hui Cao
New immunotherapy represented by immune checkpoint inhibitor therapy and chimeric antigen receptor T-Cell immunotherapy (CAR-T) has already become hot trend in the treatment of malignant tumors. In gastrointestinal stromal tumor (GIST), with notable tumor-infiltrating immune cells existing in GIST tissues and immunological effects reported in imatinib mesylate (IM) treatment, the clinicians and researchers started to realize the possibilities of immunotherapy in GIST. Recent studies reported that PD-1/PD-L1 or CTLA-4 blockade may enhance the T-cell activity and anti-tumor effect of targeted therapy, which can be applied in advanced GIST, and anti-KIT CAR T-cells indicated a new immunotherapeutic targeted strategy for GIST patients with TKI resistance...
September 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28895856/gene-modified-t-cell-therapies-for-hematological-malignancies
#5
REVIEW
Ulrike Abramowski-Mock, Juliette M Delhove, Waseem Qasim
This article focuses on clinical applications of T cells transduced to express recombinant T cell receptor and chimeric antigen receptor constructs directed toward hematological malignancies, and considers newer strategies incorporating gene-editing technologies to address GvHD and host-mediated rejection. Recent data from clinical trials are reviewed, and an overview is provided of current and emerging manufacturing processes; consideration is also given to new developments in the pipeline.
October 2017: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/28888074/early-recovery-of-circulating-immature-b-cells-in-b-lymphoblastic-leukemia-patients-after-cd19-targeted-car-t-cell-therapy-a-pitfall-for-minimal-residual-disease-detection
#6
Wenbin Xiao, Dalia Salem, Catherine McCoy, Daniel Lee, Nirali N Shah, Maryalice Stetler-Stevenson, Constance M Yuan
BACKGROUND: CD19-targeted chimeric-antigen receptor-modified T-cells (CAR-T) are promising in the treatment of refractory B-lymphoblastic leukemia (B-ALL). Minimal residual disease (MRD) detection by multicolor flow cytometry (FCM) is critical to distinguish B-ALL MRD from regenerating, non-neoplastic B-cell populations. METHODS: FCM was performed on samples from 9 patients with B-ALL treated with CAR-T. RESULTS: All 9 patients showed response to CAR-T...
September 9, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28887358/first-ever-car-t-cell-therapy-approved-in-u-s
#7
(no author information available yet)
The first chimeric antigen receptor T-cell therapy, tisagenlecleucel, received FDA approval for the treatment of patients up to 25 years of age with B-cell precursor acute lymphoblastic leukemia who haven't responded to standard therapy or who have relapsed at least twice.
September 8, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28885562/human-cd3-t-cells-with-the-anti-erbb2-chimeric-antigen-receptor-exhibit-efficient-targeting-and-induce-apoptosis-in-erbb2-overexpressing-breast-cancer-cells
#8
Rusheni Munisvaradass, Suresh Kumar, Chandramohan Govindasamy, Khalid S Alnumair, Pooi Ling Mok
Breast cancer is a common malignancy among women. The innate and adaptive immune responses failed to be activated owing to immune modulation in the tumour microenvironment. Decades of scientific study links the overexpression of human epidermal growth factor receptor 2 (ERBB2) antigen with aggressive tumours. The Chimeric Antigen Receptor (CAR) coding for specific tumour-associated antigens could initiate intrinsic T-cell signalling, inducing T-cell activation, and cytotoxic activity without the need for major histocompatibility complex recognition...
September 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28880983/chimeric-antigen-receptor-car-t-cell-therapy
#9
John M Pagel, Howard Jack West
No abstract text is available yet for this article.
September 7, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28880014/chimeric-antigen-receptor-car-transduced-natural-killer-cells-in-tumor-immunotherapy
#10
REVIEW
Yuan Hu, Zhi-Gang Tian, Cai Zhang
Natural killer (NK) cells are potential effector cells in cell-based cancer immunotherapy, particularly in the control of hematological malignancies. The chimeric antigen receptor (CAR) is an artificially modified fusion protein that consists of an extracellular antigen recognition domain fused to an intracellular signaling domain. T cells genetically modified with a CAR have demonstrated remarkable success in the treatment of hematological cancers. Compared to T cells, CAR-transduced NK cells (CAR-NK) exhibit several advantages, such as safety in clinical use, the mechanisms by which they recognize cancer cells, and their abundance in clinical samples...
September 7, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28878363/a-tcr-based-chimeric-antigen-receptor
#11
Even Walseng, Hakan Köksal, Ibrahim M Sektioglu, Anne Fåne, Gjertrud Skorstad, Gunnar Kvalheim, Gustav Gaudernack, Else Marit Inderberg, Sébastien Wälchli
Effector T cells equipped with engineered antigen receptors specific for cancer targets have proven to be very efficient. Two methods have emerged: the Chimeric Antigen Receptors (CARs) and T-cell Receptor (TCR) redirection. Although very potent, CAR recognition is limited to membrane antigens which represent around 1% of the total proteins expressed, whereas TCRs have the advantage of targeting any peptide resulting from cellular protein degradation. However, TCRs depend on heavy signalling machinery only present in T cells which restricts the type of eligible therapeutic cells...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877629/application-of-chimeric-antigen-receptor-engineered-t-cells-in-ovarian-cancer-therapy
#12
Minghui Zhang, Dr Bin Zhang, Huirong Shi
Due to the critical role of T cells in the immune surveillance of ovarian cancer, adoptive T-cell therapies are receiving increased attention as an immunotherapeutic approach for ovarian cancer. Chimeric antigen receptors (CARs), constructed by incorporating the single-chain Fv fragment to a T-cell signaling domain such as CD3 ζ or Fc receptor γ chain, endow T cell with nonmajor histocompatibility complex-restricted specificity. Dual specificity, trans-signaling CARs and affinity-tuned single-chain Fv fragment have broadened the applicability of CAR-engineered T-cell therapy and may be considered preferential to T cell receptor T-cell therapy in clinical care...
September 2017: Immunotherapy
https://www.readbyqxmd.com/read/28874817/armored-car-t-cells-enhance-antitumor-efficacy-and-overcome-the-tumor-microenvironment
#13
Oladapo O Yeku, Terence J Purdon, Mythili Koneru, David Spriggs, Renier J Brentjens
Chimeric antigen receptor (CAR) T cell therapy has shown limited efficacy for the management of solid tumor malignancies. In ovarian cancer, this is in part due to an immunosuppressive cytokine and cellular tumor microenvironment which suppresses adoptively transferred T cells. We engineered an armored CAR T cell capable of constitutive secretion of IL-12, and delineate the mechanisms via which these CAR T cells overcome a hostile tumor microenvironment. In this report, we demonstrate enhanced proliferation, decreased apoptosis and increased cytotoxicity in the presence of immunosuppressive ascites...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28872470/stop-and-go-hematopoietic-cell-transplantation-in-the-era-of-chimeric-antigen-receptor-t-cells-and-checkpoint-inhibitors
#14
Arnab Ghosh, Ioannis Politikos, Miguel-Angel Perales
PURPOSE OF REVIEW: For several decades, hematopoietic cell transplantation (HCT) has been considered the standard curative therapy for many patients with hematological malignancies. In addition to the cytotoxic effects of the chemotherapy and radiation used in the conditioning regimen, the benefits of HCT are derived from a reset of the immune system and harnessing the ability of donor T cells to eliminate malignant cells. With the dawn of the era of immunotherapies in the form of checkpoint inhibitors and chimeric antigen receptor (CAR) T cells, the role of HCT has evolved...
September 1, 2017: Current Opinion in Oncology
https://www.readbyqxmd.com/read/28871274/paired-expression-analysis-of-tumor-cell-surface-antigens
#15
Rimas J Orentas, Sivasish Sindiri, Christine Duris, Xinyu Wen, Jianbin He, Jun S Wei, Jason Jarzembowski, Javed Khan
Adoptive immunotherapy with antibody-based therapy or with T cells transduced to express chimeric antigen receptors (CARs) is useful to the extent that the cell surface membrane protein being targeted is not expressed on normal tissues. The most successful CAR-based (anti-CD19) or antibody-based therapy (anti-CD20) in hematologic malignancies has the side effect of eliminating the normal B cell compartment. Targeting solid tumors may not provide a similar expendable marker. Beyond antibody to Her2/NEU and EGFR, very few antibody-based and no CAR-based therapies have seen broad clinical application for solid tumors...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28868758/programmed-cell-death-ligand-1-pd-l1-expression-is-not-a-predominant-feature-in-ewing-sarcomas
#16
Christian Spurny, Sareetha Kailayangiri, Silke Jamitzky, Bianca Altvater, Eva Wardelmann, Uta Dirksen, Jendrik Hardes, Wolfgang Hartmann, Claudia Rossig
BACKGROUND: Programmed cell death 1 (PD-1) receptor engagement on T cells by its ligand programmed cell death ligand 1 (PD-L1) is a key mechanism of immune escape, and antibody blockade of the interaction has emerged as an effective immunotherapeutic strategy in some cancers. The role and relevance of the PD-1 checkpoint in Ewing sarcoma (EwS) is not yet understood. PROCEDURE: Here, we investigated expression of PD-L1 and PD-1 in EwS by immunohistochemistry analysis of pretherapeutic tumor biopsies and in tumor xenografts following treatment with human T cells engineered to express a chimeric antigen receptor (CAR) against the tumor-associated antigen GD2 ...
September 4, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28862644/chimeric-antigen-receptor-car-t-cell-therapy-for-malignant-pleural-mesothelioma-mpm
#17
REVIEW
Astero Klampatsa, Andrew R Haas, Edmund K Moon, Steven M Albelda
Cancer immunotherapy has now become a recognized approach to treating cancers. In addition to checkpoint blockade, adoptive T cell transfer (ACT) using chimeric antigen receptors (CARs) has shown impressive clinical outcomes in leukemias and is now being explored in solid tumors. CARs are engineered receptors, stably or transiently transduced into T cells, that aim to enhance T cell effector function by recognizing and binding to a specific tumor-associated antigen. In this review, we provide a summary of CAR T cell preclinical studies and clinical trials for malignant pleural mesothelioma (MPM), a rare, locally invasive pleural cancer with poor prognosis...
September 1, 2017: Cancers
https://www.readbyqxmd.com/read/28862366/redirect-killer-t-cells-via-displaying-azido-sugar-for-tethering-ligands
#18
Weiling Wang, Zhiying Zhao, Ziwei Zhang, Chuanling Zhang, Sulong Xiao, Xinshan Ye, Lihe Zhang, Qing Xia, Demin Zhou
The genetic expression of chimeric antigen receptors (CARs) on the surface of T cells enables the redirection of T-cell specificity. To broaden the versatility of T cells as tumor-specific killers, we developed a non-genetic approach by which azide-containing sialic acids were metabolically incorporated to modify cellular sialyl glycans. Given displaying such a chemical moiety on T cells, small molecular ligands such as RGD and folate, as proof-of-concept, instead of supersized antibodies were clicked orthogonally, leading to highly selective, time- and dose-dependent cytotoxicity to integrin αvβ3- and folate receptor-positive cells, respectively...
September 1, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28862319/breakthroughs-in-modern-cancer-therapy-and-elusive-cardiotoxicity-critical-research-practice-gaps-challenges-and-insights
#19
REVIEW
Ping-Pin Zheng, Jin Li, Johan M Kros
To date, five cancer treatment modalities have been defined. The three traditional modalities of cancer treatment are surgery, radiotherapy, and conventional chemotherapy, and the two modern modalities include molecularly targeted therapy (the fourth modality) and immunotherapy (the fifth modality). The cardiotoxicity associated with conventional chemotherapy and radiotherapy is well known. Similar adverse cardiac events are resurging with the fourth modality. Aside from the conventional and newer targeted agents, even the most newly developed, immune-based therapeutic modalities of anticancer treatment (the fifth modality), e...
September 1, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28860806/enhancement-of-antitumor-activity-by-using-a-fully-human-gene-encoding-a-single-chain-fragmented-antibody-specific-for-carcinoembryonic-antigen
#20
Hirotomo Shibaguchi, Naixiang Luo, Naoto Shirasu, Motomu Kuroki, Masahide Kuroki
Human leukocyte antigen and/or costimulatory molecules are frequently lacking in metastatic tumor cells, and thus tumor cells are able to escape from the immune system. Although lymphocytes with a chimeric antigen receptor (CAR) is a promising approach for overcoming this challenge in cancer immunotherapy, administration of modified T cells alone often demonstrates little efficacy in patients. Therefore, in order to enhance the antitumor activity of immune cells in the cancer microenvironment, we used lymphocytes expressing CAR in combination with a fusion protein of IL-2 that contained the single-chain fragmented antibody (scFv) specific for the carcinoembryonic antigen...
2017: OncoTargets and Therapy
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