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Jurkat cells

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https://www.readbyqxmd.com/read/29147486/a-novel-medium-throughput-biological-assay-system-for-htlv-1-infectivity-and-drug-discovery
#1
Mojtaba Fattahi Abdizadeh, Manoochehr Makvandi, Alireza Samarbafzadeh, Kayhan Azadmanesh
Objectives: Here, a reporter cell line containing two reporter vectors were developed, in order to monitor the Human T-Lymphotropic Virus type1(HTLV-1) infectivity and the cell viability simultaneously. Materials and Methods: The reporter cell line was constructed by stably transfected baby hamster's kidney cell line (BHK-21), with the genomes expressing two different reporters in separate plasmids. The first reporter gene is transactivated by the HTLV-1 tax protein, while the second reporter is continuously expressed when introduced into a mammalian cell...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29143174/single-cell-imaging-using-radioluminescence-microscopy-reveals-unexpected-binding-target-for-18f-hfb
#2
Louise Kiru, Tae Jin Kim, Bin Shen, Frederick T Chin, Guillem Pratx
PURPOSE: Cell-based therapies are showing great promise for a variety of diseases, but remain hindered by the limited information available regarding the biological fate, migration routes and differentiation patterns of infused cells in trials. Previous studies have demonstrated the feasibility of using positron emission tomography (PET) to track single cells utilising an approach known as positron emission particle tracking (PEPT). The radiolabel hexadecyl-4-[(18)F]fluorobenzoate ([(18)F]HFB) was identified as a promising candidate for PEPT, due to its efficient and long-lasting labelling capabilities...
November 15, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29142417/inhibition-of-phosphorylated-c-jun-nh-2-terminal-kinase-by-2-4-dihydroxy-6-methoxy-3-5-dimethylchalcone-isolated-from-eugenia-aquea-burm-f-leaves-in-jurkat-t-cells
#3
Melisa I Barliana, Ajeng Diantini, Anas Subarnas, Rizky Abdulah, Takashi Izumi
Background: Indonesian medicinal plants have been used for their anticancer activity for decades. However, the therapeutic effects of medicinal plants have not been fully examined scientifically. As cancer is a major health problem worldwide, searching for a new anticancer compound has attracted considerable attention. Our previous study found that 2',4'-dihydroxy-6-methoxy-3,5-dimethylchalcone, an active compound isolated from leaves of Indonesian medicinal plants Eugenia aquea Burm f...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29138813/reduced-mirna%C3%A2-214-expression-in-oral-mucosa-contributes-to-the-pathogenesis-of-oral-lichen-planus-by-targeting-cd44
#4
Haiyan Zheng, Shaohui Li
The present study aimed to investigate the role of miRNAs during the pathogenesis of oral lichen planus (OLP). OLP is a chronic inflammatory disorder, which involves T‑cell mediated autoimmunity and affects the skin, scalp, nails and mucosa. Abundant T lymphocytes have been demonstrated to infiltrate the oral mucosa, in which the activated T cells trigger apoptosis of oral epithelial cells. Overexpression of osteopontin (OPN) and CD44 has been observed in the mucosa of patients with OLP, and it has been confirmed that OPN suppresses the apoptosis of activated CD8+ T cells via CD44...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29132471/-oridonin-inhibits-proliferation-of-jurkat-cells-via-the-down-regulation-of-brg1
#5
Zhen-Zhen Ye, Fei-Long Xue, Wen-Ping Ding, Xiang Kong, Yi-Na Shen
OBJECTIVE: To investigate the effect of oridonin on the human acute lymphocytic leukemia cell line Jurkat and its mechanism. METHODS: Jurkat cells were cultured in vitro and treated with various concentrations (0, 1.25, 2.5, 5, and 10 μmol/L) of oridonin for different lengths of time (24, 48, and 72 hours). The proliferation of Jurkat cells was analyzed by MTT assay. The changes in nuclear morphology were evaluated by fluorescence microscopy at 12 hours after treatment with various concentrations of oridonin...
November 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29127762/anti-invasive-and-antiproliferative-effects-of-pleurotus-ostreatus-extract-on-acute-leukemia-cell-lines
#6
Alireza Ebrahimi, Amir Atashi, Masoud Soleimani, Maedeh Mashhadikhan, Ahmadreza Barahimi, Amirhossein Maghari
BACKGROUND: Currently, mushrooms have been used in traditional and folk medicines for their therapeutic activities, such as antibiotic, antitumor, anti-inflammatory, anticancer, antileukemic and immunomodulatory actions. This investigation evaluates the anti-invasive, antiproliferative and cytotoxic effects of Pleurotus ostreatus (Pleurotaceae) on leukemia cell lines. METHODS: The proliferation of KG-1 cells was measured by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay after treatment with gradient dilutions of P...
November 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29114247/elusive-role-of-the-cd94-nkg2c-nk-cell-receptor-in-the-response-to-cytomegalovirus-novel-experimental-observations-in-a-reporter-cell-system
#7
Aldi Pupuleku, Marcel Costa-García, Domènec Farré, Hartmut Hengel, Ana Angulo, Aura Muntasell, Miguel López-Botet
Human cytomegalovirus (HCMV) infection promotes the differentiation and persistent expansion of a mature NK cell subset, which displays high surface levels of the activating CD94/NKG2C NK cell receptor, together with additional distinctive phenotypic and functional features. The mechanisms underlying the development of adaptive NK cells remain uncertain but some observations support the involvement of a cognate interaction of CD94/NKG2C with ligand(s) displayed by HCMV-infected cells. To approach this issue, the heterodimer and its adaptor (DAP12) were expressed in the human Jurkat leukemia T cell line; signaling was detected by transfection of a reporter plasmid encoding for Luciferase (Luc) under NFAT/AP1-dependent control...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29107869/surfactant-protein-d-regulates-caspase-8-mediated-cascade-of-the-intrinsic-pathway-of-apoptosis-while-promoting-bleb-formation
#8
Pascal Djiadeu, Nicole Farmakovski, Dhia Azzouz, Lakshmi P Kotra, Neil Sweezey, Nades Palaniyar
Surfactant-associated protein D (SP-D) is a soluble innate immune collectin present on many mucosal surfaces. We recently showed that SP-D suppresses the extrinsic pathway of apoptosis by downregulating caspase-8 activation. However, the effects of SP-D on the intrinsic pathway of apoptosis are not clearly understood. In the intrinsic pathway, cytochrome c is released by mitochondria into the cytoplasm. Oxidation of cytochrome c by cytochrome c oxidase activates the apoptosome and caspase-9 cascade. Both caspase-8- and caspase-9-mediated branches are activated in the intrinsic pathway of apoptosis; however, little is known about the relevance of the caspase-8 pathway in this context...
November 3, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29099045/gene-editing-in-human-lymphoid-cells-role-for-donor-dna-type-of-genomic-nuclease-and-cell-selection-method
#9
Anastasia Zotova, Elena Lopatukhina, Alexander Filatov, Musa Khaitov, Dmitriy Mazurov
Programmable endonucleases introduce DNA breaks at specific sites, which are repaired by non-homologous end joining (NHEJ) or homology recombination (HDR). Genome editing in human lymphoid cells is challenging as these difficult-to-transfect cells may also inefficiently repair DNA by HDR. Here, we estimated efficiencies and dynamics of knockout (KO) and knockin (KI) generation in human T and B cell lines depending on repair template, target loci and types of genomic endonucleases. Using zinc finger nuclease (ZFN), we have engineered Jurkat and CEM cells with the 8...
November 2, 2017: Viruses
https://www.readbyqxmd.com/read/29094598/cyclic-cystine-bridged-peptides-from-the-marine-sponge-clathria-basilana-induce-apoptosis-in-tumor-cells-and-depolarize-the-bacterial-cytoplasmic-membrane
#10
Amin Mokhlesi, Fabian Stuhldreier, Katharina W Wex, Anne Berscheid, Rudolf Hartmann, Nidja Rehberg, Parichat Sureechatchaiyan, Chaidir Chaidir, Matthias U Kassack, Rainer Kalscheuer, Heike Brötz-Oesterhelt, Sebastian Wesselborg, Björn Stork, Georgios Daletos, Peter Proksch
Investigation of the sponge Clathria basilana collected in Indonesia afforded five new peptides, including microcionamides C (1) and D (2), gombamides B (4), C (5), and D (6), and an unusual amide, (E)-2-amino-3-methyl-N-styrylbutanamide (7), along with 11 known compounds, among them microcionamide A (3). The structures of the new compounds were elucidated by one- and two-dimensional NMR spectroscopy as well as by high-resolution mass spectrometry. The absolute configurations of the constituent amino acid residues in 1-7 were determined by Marfey's analysis...
November 2, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29093759/increased-hydrophobic-block-length-of-ptdms-promotes-protein-internalization
#11
Coralie M Backlund, Federica Sgolastra, Ronja Otter, Lisa Minter, Toshihide Takeuchi, Shiroh Futaki, Gregory N Tew
The plasma membrane is a major obstacle in the development and use of biomacromolecules for intracellular therapeutic applications. Protein transduction domains (PTDs) have been used to overcome this barrier, but often require covalent conjugation to their cargo and can be time consuming to synthesize. Synthetic monomers can be designed to mimic the amino acid moieties in PTDs, and their resulting polymers provide a well-controlled platform to vary molecular composition for structure-activity relationship studies...
December 28, 2016: Polymer Chemistry
https://www.readbyqxmd.com/read/29093342/biological-activities-of-novel-derivatives-of-differentiation-inducing-factor-3-from-dictyostelium-discoideum
#12
Katsunori Takahashi, Haruhisa Kikuchi, Van Hai Nguyen, Yoshiteru Oshima, Hirotaka Ishigaki, Junko Nakajima-Shimada, Yuzuru Kubohara
Differentiation-inducing factor-3 (DIF-3; 1-(3-chloro-2,6-dihydroxy-4-methoxyphenyl)hexan-1-one), which is found in the cellular slime mold Dictyostelium discoideum, is a potential candidate compound for the development of new medicines; DIF-3 and its derivatives possess several beneficial biological activities, including anti-tumor, anti-Trypanosoma cruzi, and immunoregulatory effects. To assess the relationship between the biological activities of DIF-3 and its chemical structure, particularly in regard to its alkoxy group and the length of the alkyl chains at the acyl group, we synthesized two derivatives of DIF-3, 1-(3-chloro-2,6-dihydroxy-4-methoxyphenyl)octan-1-one (DIF-3(+3)) and 1-(3-chloro-2,6-dihydroxy-4-butoxyphenyl)-hexan-1-one (Hex-DIF-3), and investigated their biological activities in vitro...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29083161/-from-the-edge-to-the-center-viscoelastic-migration-of-particles-and-cells-in-a-strongly-shear-thinning-liquid-flowing-in-a-microchannel
#13
Francesco Del Giudice, Shivani Sathish, Gaetano D'Avino, Amy Q Shen
Controlling the fate of particles and cells in microfluidic devices is critical in many biomedical applications, such as particle and cell alignment and separation. Recently, viscoelastic polymer solutions have been successfully used to promote transversal migration of particles and cells towards fixed positions in straight microchannels. When inertia is negligible, numerical simulations have shown that strongly shear-thinning polymer solutions (fluids with a shear viscosity that decreases with increasing flow rates) promote transversal migration of particles and cells towards the corners or towards the centerline in a straight microchannel with a square cross section, as a function of particle size, cell deformability and channel height...
October 30, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29083107/increased-mir-223-expression-in-foetal-organs-is-a-signature-of-acute-chorioamnionitis-with-systemic-consequences
#14
JoonHo Lee, Chong Jai Kim, Jung-Sun Kim, Deug-Chan Lee, Sejin Ahn, Bo Hyun Yoon
Acute chorioamnionitis, frequently observed in preterm placentas, is a major risk factor for the development of infection and non-infection-related adverse perinatal outcomes. MicroRNAs play important roles in immune cell development and function as well as in the development of cancers and neurologic diseases. We sought to investigate the changes in microRNA-223 (miR-223) expression and the functional significance of the changes in miR-223 expression in foetal organs in the presence of acute chorioamnionitis...
October 30, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29082287/flow-cytometric-analysis-of-hiv-1-transcriptional-activity-in-response-to-shrna-knockdown-in-a2-and-a72-j-lat-cell-lines
#15
Daniela Boehm, Melanie Ott
The main obstacle to eradicating HIV-1 from patients is post-integration latency (Finzi et al., 1999). Antiretroviral treatments target only actively replicating virus, while latent infections that have low or no transcriptional activity remain untreated (Sedaghat et al., 2007). To eliminate viral reservoirs, one strategy focuses on reversing HIV-1 latency via 'shock and kill' (Deeks, 2012). The basis of this strategy is to overcome the molecular mechanisms of HIV-1 latency by therapeutically inducing viral gene and protein expression under antiretroviral therapy and to cause selective cell death via the lytic properties of the virus, or the immune system now recognizing the infected cells...
June 5, 2017: Bio-protocol
https://www.readbyqxmd.com/read/29075062/antiproliferative-and-apoptosis-inducing-activities-of-thymoquinone-in-lymphoblastic-leukemia-cell-line
#16
Amin Soltani, Batoul Pourgheysari, Hedayatollah Shirzad, Zahra Sourani
Acute lymphoblastic leukemia is one of the malignant proliferations of lymphoid cells in the early stages of differentiation and accounts for about 80% of all cases of childhood leukemia. Side effects of available treatment are still main concern. Thymoquinone (TQ), a natural compound isolated from Nigella sativa, induces growth inhibition and apoptosis in several cancer cell lines. The aim of the present study was to investigate the effect of TQ alone and in combination with doxorubicine on the proliferation inhibition and apoptosis induction of TQ in a lymphoblastic leukemia cell line...
December 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/29069777/small-molecule-inhibitors-of-pd-1-pd-l1-immune-checkpoint-alleviate-the-pd-l1-induced-exhaustion-of-t-cells
#17
Lukasz Skalniak, Krzysztof M Zak, Katarzyna Guzik, Katarzyna Magiera, Bogdan Musielak, Magdalena Pachota, Bozena Szelazek, Justyna Kocik, Przemyslaw Grudnik, Marcin Tomala, Sylwia Krzanik, Krzysztof Pyrc, Alexander Dömling, Grzegorz Dubin, Tad A Holak
Antibodies targeting the PD-1/PD-L1 immune checkpoint achieved spectacular success in anticancer therapy in the recent years. In contrast, no small molecules with cellular activity have been reported so far. Here we provide evidence that small molecules are capable of alleviating the PD-1/PD-L1 immune checkpoint-mediated exhaustion of Jurkat T-lymphocytes. The two optimized small-molecule inhibitors of the PD-1/PD-L1 interaction, BMS-1001 and BMS-1166, developed by Bristol-Myers Squibb, bind to human PD-L1 and block its interaction with PD-1, when tested on isolated proteins...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29061784/bmi1-inhibitors-down-regulate-notch-signaling-and-suppress-proliferation-of-acute-leukemia-cells
#18
Mika Ohtaka, Mai Itoh, Shuji Tohda
BACKGROUND/AIM: B cell-specific Moloney murine leukemia virus integration site 1 (BMI1) is up-regulated in several cancers; therefore, we investigated the effects of BMI1 inhibitors on leukemia cells. MATERIALS AND METHODS: Four acute myeloid leukemia and two T-lymphoblastic leukemia cell lines were treated with BMI1 inhibitors artemisinin, PRT4165, and PTC-209 and analyzed for cell proliferation and gene expression by microarray and immunoblotting. RESULTS: PTC-209 and PRT4165 suppressed the growth of all cell lines through apoptosis...
November 2017: Anticancer Research
https://www.readbyqxmd.com/read/29057517/the-indane-diastereoisomers-ph2-and-ph5-divergence-between-their-effects-in-delayed-type-hypersensitivity-models-and-a-model-of-colitis
#19
Neil H Frankish, Brendan McHale, Helen Sheridan
OBJECTIVES: Compounds PH2 and PH5 are distereoisomers of novel indane compounds, synthesised as analogues of secondary metabolites of the fern, Onychium. In this study, we compare their effects on a variety of inflammatory models. METHODS: In an effort to extend our knowledge of their anti-inflammatory profile, we have investigated their activity in two models of delayed-type hypersensitivity (DTH); the methylated bovine serum albumin model (mBSA) and the oxazolone contact hypersensitivity (CHS) model, on IL2 release from Jurkat cells and in the dextran sulphate sodium (DSS) murine model of inflammatory bowel disease...
October 23, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29056830/aloperine-protects-mice-against-dss-induced-colitis-by-pp2a-mediated-pi3k-akt-mtor-signaling-suppression
#20
Xiaoxia Fu, Fei Sun, Faxi Wang, Junai Zhang, Biying Zheng, Jixin Zhong, Tiantian Yue, Xuebao Zheng, Jun-Fa Xu, Cong-Yi Wang
Colitis is a major form of inflammatory bowel disease which involved mucosal immune dysfunction. Aloperine is an alkaloid isolated from the shrub Sophora alopecuroides L. and has been recognized as an effective treatment for inflammatory and allergic diseases. The present study aimed to examine the molecular mechanisms underlying aloperine-mediated colitis protection. We found that aloperine treatment improved colitis induced by dextran sodium sulfate (DSS) based on body weight, disease activity index, colonic length, and spleen index...
2017: Mediators of Inflammation
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