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https://www.readbyqxmd.com/read/29776374/the-toxoplasma-gondii-me-49-strain-upregulates-levels-of-a20-that-inhibit-nf-%C3%AE%C2%BAb-activation-and-promotes-apoptosis-in-human-leukaemia-t-cell-lines
#1
Qian Chen, Min-Hui Pang, Xiao-Hong Ye, Guang Yang, Chen Lin
BACKGROUND: Acute T-lymphocyte leukaemia is a form of haematological malignancy with abnormal activation of NF-κB pathway, which results in high expression of A20 and ABIN1, which constitute a negative feedback mechanism for the regulation of NF-κB activation. Clinical studies have found that acute T-lymphocyte leukaemia patients are susceptible to Toxoplasma gondii infection; however, the effect of T. gondii on the proliferation and apoptosis of human leukaemia T-cells remains unclear...
May 18, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29765535/effects-of-cb2-and-trpv1-receptors-stimulation-in-pediatric-acute-t-lymphoblastic-leukemia
#2
Francesca Punzo, Iolanda Manzo, Chiara Tortora, Elvira Pota, Velia D' Angelo, Giulia Bellini, Alessandra Di Paola, Federica Verace, Fiorina Casale, Francesca Rossi
T-Acute Lymphoblastic Leukemia (T-ALL) is less frequent than B-ALL, but it has poorer outcome. For this reason new therapeutic approaches are needed to treat this malignancy. The Endocannabinoid/Endovanilloid (EC/EV) system has been proposed as possible target to treat several malignancies, including lymphoblastic diseases. The EC/EV system is composed of two G-Protein Coupled Receptors (CB1 and CB2), the Transient Potential Vanilloid 1 (TRPV1) channel, their endogenous and exogenous ligands and enzymes. CB1 is expressed mainly in central nervous system while CB2 predominantly on immune and peripheral cells, therefore we chose to selectively stimulate CB2 and TRPV1...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29763901/5-aminolevulinic-acid-mediated-sonodynamic-therapy-alleviates-atherosclerosis-via-enhancing-efferocytosis-and-facilitating-a-shift-in-the-th1-th2-balance-toward-th2-polarization
#3
Yang Yang, Yuanyuan Liu, Xi Chen, Jie Gong, Zhen Huang, Wei Wang, Yuanqi Shi, Yu Wang, Jianting Yao, Zhaoqian Shen, Zhen Tian, Hong Jin, Ye Tian
BACKGROUND/AIMS: We and other groups have demonstrated that 5-aminolevulinic acid (ALA)-mediated sonodynamic therapy (ALA-SDT) induces macrophage and foam cell apoptosis and stabilizes atherosclerosis (AS) plaques in animal models. Lymphocytes also play vital roles in the development of AS. The primary purpose of the present study was to investigate the effects of ALA-SDT on T helper (Th) cell fate and function, Th subset differentiation, and atherosclerotic lesion stability. METHODS: We utilized ALA-SDT on Western diet-fed apoE-/-mice in vivo and human Jurkat cells in vitro...
May 9, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29760710/ionizing-radiation-induces-morphological-changes-and-immunological-modulation-of-jurkat-cells
#4
Patrick Voos, Sebastian Fuck, Fabian Weipert, Laura Babel, Dominique Tandl, Tobias Meckel, Stephanie Hehlgans, Claudia Fournier, Anna Moroni, Franz Rödel, Gerhard Thiel
Impairment or stimulation of the immune system by ionizing radiation (IR) impacts on immune surveillance of tumor cells and non-malignant cells and can either foster therapy response or side effects/toxicities of radiation therapy. For a better understanding of the mechanisms by which IR modulates T-cell activation and alters functional properties of these immune cells, we exposed human immortalized Jurkat cells and peripheral blood lymphocytes (PBL) to X-ray doses between 0.1 and 5 Gy. This resulted in cellular responses, which are typically observed also in naïve T-lymphocytes in response of T-cell receptor immune stimulation or mitogens...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29759726/n-aryl-piperidine-4-carboxamides-as-a-novel-class-of-potent-inhibitors-of-malt1-proteolytic-activity
#5
Achim Schlapbach, Laszlo Revesz, Carole Pissot Soldermann, Thomas Zoller, Catherine H Régnier, Frédéric Bornancin, Thomas Radimerski, Jutta Blank, Ansgar Schuffenhauer, Martin Renatus, Paulus Erbel, Samu Melkko, Richard Heng, Oliver Simic, Ralf Endres, Markus Wartmann, Jean Quancard
Starting from a weak screening hit, potent and selective inhibitors of the MALT1 protease function were elaborated. Advanced compounds displayed high potency in biochemical and cellular assays. Compounds showed activity in a mechanistic Jurkat T cell activation assay as well as in the B-cell lymphoma line OCI-Ly3, which suggests potential use of MALT1 inhibitors in the treatment of autoimmune diseases as well as B-cell lymphomas with a dysregulated NF-κB pathway. Initially, rat pharmacokinetic properties of this compound series were dominated by very high clearance which could be linked to amide cleavage...
May 9, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29755980/importance-of-validating-antibodies-and-small-compound-inhibitors-using-genetic-knockout-studies-t-cell-receptor-induced-cyld-phosphorylation-by-ikk%C3%AE%C2%B5-tbk1-as-a-case-study
#6
Marie Lork, Marja Kreike, Jens Staal, Rudi Beyaert
CYLD is a deubiquitinating enzyme that plays a crucial role in immunity and inflammation as a negative regulator of NF-κB transcription factor and JNK kinase signaling. Defects in either of these pathways contribute to the progression of numerous inflammatory and autoimmune disorders. Therefore, we set out to unravel molecular mechanisms that control CYLD activity in the context of T cell receptor (TCR) signaling. More specifically, we focused on CYLD phosphorylation at Ser418, which can be detected upon immunoblotting of cell extracts with phospho(Ser418)-CYLD specific antibodies...
2018: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/29750140/proof-of-principle-that-a-decoy-virus-protects-oncolytic-measles-virus-against-neutralizing-antibodies
#7
Chun Xu, Annika Verena Goß, Carmen Dorneburg, Klaus-Michael Debatin, Jiwu Wei, Christian Beltinger
Background: Attenuated oncolytic measles virus (OMV) is a promising antitumor agent in early-phase clinical trials. However, pre-existing immunity against measles might be a hurdle for OMV therapy. Methods: OMV was inactivated with short-wavelength ultraviolet light (UV-C). Loss of replication and oncolytic activity of UV-inactivated OMV were confirmed by tissue culture infective dose 50 (TCID50 ) assay using Vero cells and by flow cytometry using Jurkat cells. An enzyme-linked immunosorbent assay was performed to verify that UV-inactivated OMV remained antigenic...
2018: Oncolytic Virotherapy
https://www.readbyqxmd.com/read/29748604/microrna-29b-142-5p-contribute-to-the-pathogenesis-of-biliary-atresia-by-regulating-the-ifn-%C3%AE-gene
#8
Yifan Yang, Zhu Jin, Rui Dong, Chao Zheng, Yanlei Huang, Yijie Zheng, Zhen Shen, Gong Chen, Xiaoying Luo, Shan Zheng
Biliary atresia is one of the most common liver disease in infancy. The cause and pathogenesis remain largely unknown. This study aimed to investigate the potential regulatory effect of miR-29b/142-5p on IFN-γ gene methylation. miRNAs microarray was performed on four pairs of liver and blood specimens from biliary atresia and choledochal cysts. We found the overexpression of miR-142-5p and mRNA level of DNA methyltransferase (DNMT) 1, and miR-29b and DNMT3a/DNMT3b were significantly negatively correlated in biliary atresia livers...
May 10, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29748600/caspase-selective-reagents-for-diagnosing-apoptotic-mechanisms
#9
Marcin Poreba, Katarzyna Groborz, Mario Navarro, Scott J Snipas, Marcin Drag, Guy S Salvesen
Apical caspases initiate and effector caspases execute apoptosis. Reagents that can distinguish between caspases, particularly apical caspases-8, 9, and 10 are scarce and generally nonspecific. Based upon a previously described large-scale screen of peptide-based caspase substrates termed HyCoSuL, we sought to develop reagents to distinguish between apical caspases in order to reveal their function in apoptotic cell death paradigms. To this end, we selected tetrapeptide-based sequences that deliver optimal substrate selectivity and converted them to inhibitors equipped with a detectable tag (activity-based probes-ABPs)...
May 10, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29743079/hiv-1-tat-expression-and-sulphamethoxazole-hydroxylamine-mediated-oxidative-stress-alter-the-disulfide-proteome-in-jurkat-t-cells
#10
Kemi Adeyanju, John R Bend, Michael J Rieder, Gregory A Dekaban
BACKGROUND: Adverse drug reactions (ADRs) are a significant problem for HIV patients, with the risk of developing ADRs increasing as the infection progresses to AIDS. However, the pathophysiology underlying ADRs remains unknown. Sulphamethoxazole (SMX) via its active metabolite SMX-hydroxlyamine, when used prophylactically for pneumocystis pneumonia in HIV-positive individuals, is responsible for a high incidence of ADRs. We previously demonstrated that the HIV infection and, more specifically, that the HIV-1 Tat protein can exacerbate SMX-HA-mediated ADRs...
May 9, 2018: Virology Journal
https://www.readbyqxmd.com/read/29741731/expression-of-grim-19-in-unexplained-recurrent-spontaneous-abortion-and-possible-pathogenesis
#11
Yang Yang, Laiyang Cheng, Xiaohui Deng, Hongling Yu, Lan Chao
STUDY QUESTION: Is aberrant expression of gene associated with retinoid-interferon-induced mortality-19 (GRIM-19) associated with unexplained recurrent spontaneous abortion (URSA)? SUMMARY ANSWER: GRIM-19 deficiency may regulate regulatory T cell/ T helper 17 cell (Treg/Th17) balance partly through reactive oxygen species (ROS) - mammalian target of rapamycin (mTOR) signaling axis in URSA. WHAT IS KNOWN ALREADY: Immunological disorders may cause impaired maternal immune tolerance to the fetus and result in fetal rejection...
May 8, 2018: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29739316/a-genome-wide-survey-of-mutations-in-the-jurkat-cell-line
#12
Louis Gioia, Azeem Siddique, Steven R Head, Daniel R Salomon, Andrew I Su
BACKGROUND: The Jurkat cell line has an extensive history as a model of T cell signaling. But at the turn of the 21st century, some expression irregularities were observed, raising doubts about how closely the cell line paralleled normal human T cells. While numerous expression deficiencies have been described in Jurkat, genetic explanations have only been provided for a handful of defects. RESULTS: Here, we report a comprehensive catolog of genomic variation in the Jurkat cell line based on whole-genome sequencing...
May 8, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29731890/solanine-induced-apoptosis-and-increased-chemosensitivity-to-adriamycin-in-t-cell-acute-lymphoblastic-leukemia-cells
#13
Ying-Jie Yi, Xiu-Hong Jia, Jian-Yong Wang, Jie-Ru Chen, Hong Wang, You-Jie Li
Solanine is an alkaloid and is the main extract of the traditional Chinese herb, Solanum nigrum Linn . It has been reported that Solanine has anti-inflammatory and antitumor properties. The present study aimed to investigate the antitumor effect of Solanine in Jurkat cells and demonstrate the molecular mechanism of antitumor activity of Solanine. A Cell Counting Kit-8 assay demonstrated that Solanine inhibited the proliferation of Jurkat cells in a dose-and time-dependent manner. Cell apoptosis was measured by flow cytometry...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29731088/tacrolimus-induced-apoptosis-is-mediated-by-endoplasmic-reticulum-derived-calcium-dependent-caspases-3-12-in-jurkat-cells
#14
Y W Chung, M W Chung, S K Choi, S J Choi, S J N Choi, S Y Chung
Apoptotic signal pathways are delivered to caspase-3, caspase-9, or both in different cells via the death receptor pathway, mitochondrial pathway, or by the endoplasmic reticulum (ER) pathway through initiators of caspase-3, -8, -9, or -12. Tacrolimus (Tac)-induced apoptosis was characterized by nuclear fragmentation and caspase-3 activation. We examined the effect of tacrolimus on ER-derived calcium and caspase-3,-12-mediated apoptosis on Jurkat human T lymphocyte. Tac decreased the viability of Jurkat cells in a dose-dependent manner...
May 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29725423/role-of-a-non-canonical-splice-variant-of-the-helios-gene-in-the-differentiation-of-acute-lymphoblastic-leukemic-t-cells
#15
Yinghui Li, Yanhua Liu, Can Liu, Fengyong Liu, Daolei Dou, Wenjie Zheng, Wei Liu, Feifei Liu
T-cell acute lymphoblastic leukemia is a hematopoietic malignant disease, which arises from a genetic defect in the T-cell maturation signaling pathway. As a result, it is necessary to identify the molecules that impact T-cell development and control lymphoid-lineage malignancy. The present study utilized Jurkat T lymphoblastic cells as a well-established approach for the investigation into the function of the non-canonical alternative splice variant of Helios for the in vitro study of T-cell differentiation and leukemogenesis...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29725363/overexpression-of-csk-binding-protein-phosphoprotein-associated-with-glycosphingolipid-enriched-microdomains-induces-cluster-of-differentiation-59-mediated-apoptosis-in-jurkat-cells
#16
Bei-Bei Cong, Mei-Hua Gao, Bing Li, Bing Wang, Bei Zhang, Li-Na Wang, Shu-Chao Zhang, Hua-Qiao Li, Zhong Wang, Shu-Yi Han
Csk-binding protein/phosphoprotein associated with glycosphingolipid-enriched microdomains (CBP/PAG) is a membrane-bound adaptor protein that downregulates the activation of Src family kinases present in lipid rafts. To elucidate the role of CBP/PAG in human T cell activation, a cell line overexpressing CBP/PAG was constructed and the function of CBP/PAG in Jurkat cells was examined. The present study revealed that increased CBP/PAG expression in T cells significantly enhanced their apoptosis and reduced cellular activation and proliferation...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29718550/combining-whispering-gallery-mode-optical-biosensors-with-microfluidics-for-real-time-detection-of-protein-secretion-from-living-cells-in-complex-media
#17
Ying-Jen Chen, Ulrike Schoeler, Chung-Hsuan Benjamin Huang, Frank Vollmer
The noninvasive monitoring of protein secretion of cells responding to drug treatment is an effective and essential tool in latest drug development and for cytotoxicity assays. In this work, a surface functionalization method is demonstrated for specific detection of protein released from cells and a platform that integrates highly sensitive optical devices, called whispering-gallery mode biosensors, with precise microfluidics control to achieve label-free and real-time detection. Cell biomarker release is measured in real time and with nanomolar sensitivity...
May 2, 2018: Small
https://www.readbyqxmd.com/read/29710477/mir-125b-is-downregulated-in-systemic-lupus-erythematosus-patients-and-inhibits-autophagy-by-targeting-uvrag
#18
Wenting Cao, Ge Qian, Wen Luo, Xin Liu, Yunjing Pu, Guilan Hu, Lulu Han, Limei Yuan, Xiao A, Danqi Deng
Systemic lupus erythematosus (SLE) is a severe autoimmune disease and the pathogenesis remains incompletely understood. This study aimed to investigate the role of miR-125b in the pathogenesis of SLE and explore the underlying mechanism. Compared to healthy controls, the expression of miR-125b decreased in peripheral blood mononuclear cells (PBMCs) of SLE patients. In addition, PBMCs exposed to ultraviolet B had lower miR-125b level compared to those unexposed to radiation. We identified UV radiation resistance associated gene (UVRAG) as a target of miR-125b...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29707134/a-jurkat-76-based-triple-parameter-reporter-system-to-evaluate-tcr-functions-and-adoptive-t-cell-strategies
#19
Sandra Rosskopf, Judith Leitner, Wolfgang Paster, Laura T Morton, Renate S Hagedoorn, Peter Steinberger, Mirjam H M Heemskerk
Adoptive T cell therapy using TCR transgenic autologous T cells has shown great potential for the treatment of tumor patients. Thorough characterization of genetically reprogrammed T cells is necessary to optimize treatment success. Here, we describe the generation of triple parameter reporter T cells based on the Jurkat 76 T cell line for the evaluation of TCR and chimeric antigen receptor functions as well as adoptive T cell strategies. This Jurkat subline is devoid of endogenous TCR alpha and TCR beta chains, thereby circumventing the problem of TCR miss-pairing and unexpected specificities...
April 3, 2018: Oncotarget
https://www.readbyqxmd.com/read/29700819/circular-rna-expression-profile-and-potential-function-of-hsa_circ_0045272-in-systemic-lupus-erythematosus
#20
Lian-Ju Li, Zhi-Wei Zhu, Wei Zhao, Sha-Sha Tao, Bao-Zhu Li, Shu-Zhen Xu, Jie-Bing Wang, Ming-Yue Zhang, Jun Wu, Rui-Xue Leng, Yin-Guang Fan, Hai-Feng Pan, Dong-Qing Ye
Circular RNAs (circRNAs) represent as a class of non-coding RNAs which form covalently closed RNA circles, and their extensive expression and conservation in mammals are observed. CircRNAs regulate gene expression through acting as competitive endogenous RNAs (ceRNAs) and modulating gene transcription. Accumulating evidence supports the implication of circRNAs in a variety of human diseases. Yet, study exploring the role of circRNAs in systemic lupus erythematosus (SLE) is lacking. The present study measured the circRNAs expression profiles in T cells from SLE patients and healthy controls with human circRNA microarray and identified 127 differentially expressed circRNAs in SLE patients...
April 26, 2018: Immunology
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