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https://www.readbyqxmd.com/read/29165554/the-effect-of-1-5%C3%A2-t-cardiac-magnetic-resonance-on-human-circulating-leucocytes
#1
William R Critchley, Anna Reid, Julie Morris, Josephine H Naish, John P Stone, Alexandra L Ball, Triin Major, David Clark, Nick Waldron, Christien Fortune, Jakub Lagan, Gavin A Lewis, Mark Ainslie, Erik B Schelbert, Daniel M Davis, Matthias Schmitt, James E Fildes, Christopher A Miller
Aims: Investigators have proposed that cardiovascular magnetic resonance (CMR) should have restrictions similar to those of ionizing imaging techniques. We aimed to investigate the acute effect of 1.5 T CMR on leucocyte DNA integrity, cell counts, and function in vitro, and in a large cohort of patients in vivo. Methods and results: In vitro study: peripheral blood mononuclear cells (PBMCs) were isolated from healthy volunteers, and histone H2AX phosphorylation (γ-H2AX) expression, leucocyte counts, and functional parameters were quantified using flow cytometry under the following conditions: (i) immediately following PBMC isolation, (ii) after standing on the benchside as a temperature and time control, (iii) after a standard CMR scan...
November 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29159986/l-asparaginase-isolated-from-streptomyces-ansochromogenes-promotes-th1-profile-and-activates-cd8-t-cells-in-human-pbmc-an-in-vitro-investigation
#2
Glêzia Renata da Silva Lacerda, Cristiane Moutinho Lagos de Melo, Ana Karine de Araújo Soares, Leyllane Rafael Moreira, Marília Cavalcanti Coriolano, Gláucia Manoella de Souza Lima, Thiago Henrique Napoleão, Virgínia Maria Barros de Lorena, Leonor Alves de Oliveira da Silva, Silene Carneiro do Nascimento
AIMS: A new L-asparaginase produced by Streptomyces ansochromogenes UFPEDA 3420 actinobacteria was used in this study against human lymphocyte cultures to evaluate the immunological profile induced by this enzyme. METHODS AND RESULTS: Cultures of lymphocytes were stimulated with S. ansochromogenes L-asparaginase and cytotoxicity, cell viability, cell stimulation and cytokine production were analyzed. This new S. ansochromogenes L-asparaginase induced activation and proliferation of the TCD8(+) lymphocyte subset and produced higher TNF-α, IFN-γ, IL-2 and IL-10 levels in a 24 hour assay...
November 21, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29150986/memory-t-cells-are-significantly-increased-in-rejecting-liver-allografts-of-rhesus-monkeys
#3
Hwajung Kim, Hyeyoung Kim, Sun-Kyung Lee, Xue-Li Jin, Tae Jin Kim, Chanho Park, Jae-Il Lee, Hyo-Sin Kim, Suk Kyun Hong, Kyung Chul Yoon, Sung Woo Ahn, Kyoung-Bun Lee, Nam-Joon Yi, Jaeseok Yang, Kwang-Woong Lee, Wayne J Hawthorne, Kyung-Suk Suh
INTRODUCTION: The Rhesus monkey (RM) is an excellent preclinical model in kidney, heart and islet transplantation that has provided the basis for new immunosuppressive protocols for clinical studies. However, there remain relatively few liver transplantation (LT) models in nonhuman primates. In this study, we analyzed the immune cell populations of PBMCs and secondary lymphoid organs along with livers of normal rhesus monkeys and compared them to those of rejecting liver transplanted recipient's following withdrawal of immunosuppression...
November 18, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/29133913/nitric-oxide-mediated-inhibition-of-antigen-presentation-from-dcs-to-cd4-t-cells-in-cancer-and-measurement-of-stat1-nitration
#4
Joseph Markowitz, Jiang Wang, Zach Vangundy, Jia You, Vedat Yildiz, Lianbo Yu, Isaac P Foote, Owen E Branson, Andrew R Stiff, Taylor R Brooks, Brandon Biesiadecki, Thomas Olencki, Susheela Tridandapani, Michael A Freitas, Tracey Papenfuss, Mitch A Phelps, William E Carson
Myeloid derived suppressor cells (MDSC) produce nitric oxide (NO) and inhibit dendritic cell (DC) immune responses in cancer. DCs present cancer cell antigens to CD4(+) T cells through Jak-STAT signal transduction. In this study, NO donors (SNAP and DETA-NONOate) inhibited DC antigen presentation. As expected, MDSC isolated from peripheral blood mononuclear cells (PBMC) from cancer patients produced high NO levels. We hypothesized that NO producing MDSC in tumor-bearing hosts would inhibit DC antigen presentation...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118244/isolation-and-characterization-of-antigen-specific-plasmablasts-using-a-novel-flow-cytometry-based-ig-capture-assay
#5
Christopher L Pinder, Sven Kratochvil, Deniz Cizmeci, Luke Muir, Yanping Guo, Robin J Shattock, Paul F McKay
We report the development of a novel flow cytometry-based Ig capture assay (ICA) for the identification and sorting of individual Ab-secreting cells based on their Ag reactivity. The ICA represents a fast and versatile tool for single-cell sorting of peripheral plasmablasts, streamlining subsequent Ab analysis, and cloning. We demonstrate the utility of the assay by isolating Ag-reactive plasmablasts from cryopreserved PBMC obtained from volunteers vaccinated with a recombinant HIV envelope protein. To show the specificity of the ICA, we produced Ag-specific Abs from these cells and subsequently verified their Ag reactivity via ELISA...
November 8, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29105401/bioinformatic-analysis-identifies-three-potentially-key-differentially-expressed-genes-in-peripheral-blood-mononuclear-cells-of-patients-with-takayasu-s-arteritis
#6
Renping Huang, Yang He, Bei Sun, Bing Liu
OBJECTIVES: This study aimed to identify several potentially key genes associated with the pathogenesis of Takayasu's arteritis (TA). This identification may lead to a deeper mechanistic understanding of TA etiology and pave the way for potential therapeutic approaches. MATERIALS AND METHODS: In this experimental study, the microarray dataset GSE33910, which includes expression data for peripheral blood mononuclear cell (PBMC) samples isolated from TA patients and normal volunteers, was downloaded from the publicly accessible Gene Expression Omnibus (GEO) database...
January 2018: Cell Journal
https://www.readbyqxmd.com/read/29100408/a-novel-fc-engineered-human-icam-1-cd54-antibody-with-potent-anti-myeloma-activity-developed-by-cellular-panning-of-phage-display-libraries
#7
Katja Klausz, Michael Cieker, Christian Kellner, Hans-Heinrich Oberg, Dieter Kabelitz, Thomas Valerius, Renate Burger, Martin Gramatzki, Matthias Peipp
To identify antibodies suitable for multiple myeloma (MM) immunotherapy, a cellular screening approach was developed using plasma cell lines JK-6L and INA-6 and human synthetic single-chain fragment variable (scFv) phage libraries. Isolated phage antibodies were screened for myeloma cell surface reactivity. Due to its binding characteristics, phage PIII-15 was selected to generate the scFv-Fc fusion protein TP15-Fc with an Fc domain optimized for FcγRIIIa binding. Various MM cell lines and patient-derived CD138-positive malignant plasma cells, but not granulocytes, B or T lymphocytes from healthy donors were recognized by TP15-Fc...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29082701/-effect-of-mirna-from-glycyrrhiza-uralensis-decoction-on-gene-expression-of-human-immune-cells
#8
Jing Xiang, Jie-Chang Huang, Chang Xu, Mian He, Peng-Cheng Xu, Dan Zhang, Wen-Feng Zhang, Han Shen, Hong-Wei Shao
MicroRNAs(miRNA) are small non-coding RNAs that regulate the expression of protein coding genes by repressing translation of protein coding mRNA or enhancing mRNA degradation. Its functions have attracted more and more attention from the public. In recent years, the cross-border regulation of miRNA has become a new research direction, and provides a new perspective for people to comprehensively understand the functions of miRNA. Plant miRNA is usually methylated and not easy to degrade. According to our previous researches, there were abundant small RNAs in the decoction of dried liquorice, which provides a new way to study the mechanism of action of licorice...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29070271/characterization-of-t-cell-subpopulations-in-patients-with-chronic-rhinosinusitis-with-nasal-polyposis
#9
Pascal Ickrath, Norbert Kleinsasser, Xin Ding, Christian Ginzkey, Niklas Beyersdorf, Rudolf Hagen, Thomas Kerkau, Stephan Hackenberg
BACKGROUND: There is an ongoing discussion concerning the potential origins of chronic rhinosinusitis with nasal polyposis (CRSwNP). OBJECTIVE: The aim of this study was to quantify subpopulations of T cells in peripheral blood and nasal polyps in CRSwNP to examine their influence on the etiology of this disease. METHODS: Tissue and blood samples were collected from 11 patients who underwent nasal sinus surgery, and these samples were analyzed by multicolor flow cytometry...
October 1, 2017: Allergy & Rhinology
https://www.readbyqxmd.com/read/28988038/innate-immune-transcriptomic-evaluation-of-pbmc-isolated-from-sheep-after-infection-with-e-ruminantium-welgevonden-strain
#10
T Nefefe, J Liebenberg, M van Kleef, H C Steyn, A Pretorius
Heartwater is a tick-borne non-infectious fatal disease of wild and domestic ruminants caused by the bacterium Ehrlichia ruminantium, transmitted by Amblyomma ticks. Although there is evidence that interferon-gamma (IFN-γ) controls E. ruminantium growth and that cellular immune responses could be protective, an effective recombinant vaccine for this disease is lacking. An overall analysis of which immune pathways are up- or down-regulated in sheep peripheral blood mononuclear cells is expected to lead to a better understanding of the global immune response of sheep to E...
November 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28968970/identification-of-a-novel-hiv-1-neutralizing-antibody-from-a-crf07_bc-infected-chinese-donor
#11
Youxiang Sun, Yuanyuan Qiao, Yuanmei Zhu, Huihui Chong, Yuxian He
The identification of human monoclonal antibodies (mAbs) able to neutralize a broad spectrum of primary HIV-1 isolates is highly important for understanding the immune response of HIV-1 infection and developing vaccines and therapeutics. In this study, we isolated a novel human mAb termed Y498 from a phage display antibody library constructed with the PBMC samples of a CRF07_BC-infected Chinese donor whose sera exhibited broadly neutralizing activity. Y498 cross-reacted with diverse Env antigens and neutralized 30% of 70 tested HIV-1 isolates...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28935426/cis-rucl-bzcn-bipy-dppe-pf6-induces-anti-angiogenesis-and-apoptosis-by-a-mechanism-of-caspase-dependent-involving-dna-damage-parp-activation-and-tp53-induction-in-ehrlich-tumor-cells
#12
Lorena Félix Magalhães, Francyelli Mello-Andrade, Wanessa Carvalho Pires, Hugo Delleon Silva, Paula Francinete Faustino da Silva, Larissa Matuda Macedo, Carlos Henrique de Castro, Cristiene Costa Carneiro, Clever Gomes Cardoso, Paulo Roberto de Melo Reis, Laís Camargo de Oliveira, Renata Rodrigues Caetano, Alzir A Batista, Elisângela de Paula Silveira-Lacerda
Antimetastatic activities, low toxicity to normal cells and high selectivity for tumor cells make of the ruthenium complexes promising candidates in the search for develop new chemotherapeutic agents for the treatment of cancer. This study aimed to determine the cytotoxic, genotoxic and to elucidate the signaling pathway involved in the death cell process induced by cis-[RuCl(BzCN)(bipy)(dppb)]PF6(1) and cis-[RuCl(BzCN)(bipy)(dppe)]PF6(2) in Ehrlich ascites carcinoma (EAC) in vitro. Moreover, we report for the first time the anti-angiogenic potential on chick embryo chorioallantoic membrane (CAM) model...
September 19, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28925977/equine-pbmc-cytokines-profile-after-in-vitro-%C3%AE-and-%C3%AE-ehv-infection-efficacy-of-a-parapoxvirus-ovis-based-immunomodulator-treatment
#13
Erika S Hue, Eric A Richard, Christine I Fortier, Guillaume D Fortier, Romain Paillot, Rudiger Raue, Stéphane L Pronost
Equine herpesviruses (EHV) infect horses early during life and the persistence of these viruses through establishment of latency represents a real risk. A better understanding of the immune response to EHV infection is necessary to improve our methods of prevention and decrease the risk of transmission. The objectives of this study were to characterise the cytokine gene expression profile of peripheral blood mononuclear cells (PBMC) after in vitro EHV-1, EHV-4, and EHV-2 infection and to determine the efficacy of inactivated Parapoxvirus ovis (iPPVO) against these 3 viruses...
September 19, 2017: Vaccines
https://www.readbyqxmd.com/read/28910385/improving-the-characterization-of-endothelial-progenitor-cell-subsets-by-an-optimized-facs-protocol
#14
Karin Huizer, Dana A M Mustafa, J Clarissa Spelt, Johan M Kros, Andrea Sacchetti
The characterization of circulating endothelial progenitor cells (EPCs) is fundamental to any study related to angiogenesis. Unfortunately, current literature lacks consistency in the definition of EPC subsets due to variations in isolation strategies and inconsistencies in the use of lineage markers. Here we address critical points in the identification of hematopoietic progenitor cells (HPCs), circulating endothelial cells (CECs), and culture-generated outgrowth endothelial cells (OECs) from blood samples of healthy adults (AB) and umbilical cord (UCB)...
2017: PloS One
https://www.readbyqxmd.com/read/28892515/strong-interferon-gamma-mediated-cellular-immunity-to-scrub-typhus-demonstrated-using-a-novel-whole-cell-antigen-elispot-assay-in-rhesus-macaques-and-humans
#15
Manutsanun Sumonwiriya, Daniel H Paris, Piyanate Sunyakumthorn, Tippawan Anantatat, Kemajittra Jenjaroen, Suchintana Chumseng, Rawiwan Im-Erbsin, Ampai Tanganuchitcharnchai, Suthatip Jintaworn, Stuart D Blacksell, Fazle R Chowdhury, Barbara Kronsteiner, Prapit Teparrukkul, Robin L Burke, Eric D Lombardini, Allen L Richards, Carl J Mason, James W Jones, Nicholas P J Day, Susanna J Dunachie
Scrub typhus is a febrile infection caused by the obligate intracellular bacterium Orientia tsutsugamushi, which causes significant morbidity and mortality across the Asia-Pacific region. The control of this vector-borne disease is challenging due to humans being dead-end hosts, vertical maintenance of the pathogen in the vector itself, and a potentially large rodent reservoir of unclear significance, coupled with a lack of accurate diagnostic tests. Development of an effective vaccine is highly desirable. This however requires better characterization of the natural immune response of this neglected but important disease...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28870461/enhanced-plasmacytoid-dendritic-cell-antiviral-responses-after-omalizumab
#16
Michelle A Gill, Andrew H Liu, Agustin Calatroni, Rebecca Z Krouse, Baomei Shao, Allison Schiltz, James E Gern, Alkis Togias, William W Busse
BACKGROUND: Atopy and viral respiratory tract infections synergistically promote asthma exacerbations. IgE cross-linking inhibits critical virus-induced IFN-α responses of plasmacytoid dendritic cells (pDCs), which can be deficient in patients with allergic asthma. OBJECTIVE: We sought to determine whether reducing IgE levels in vivo with omalizumab treatment increases pDC antiviral IFN-α responses in inner-city children with asthma. METHODS: PBMCs and pDCs isolated from children with exacerbation-prone asthma before and during omalizumab treatment were stimulated ex vivo with rhinovirus and influenza in the presence or absence of IgE cross-linking...
September 1, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28870237/the-n-and-c-terminal-carbohydrate-recognition-domains-of-haemonchus-contortus-galectin-bind-to-distinct-receptors-of-goat-pbmc-and-contribute-differently-to-its-immunomodulatory-functions-in-host-parasite-interactions
#17
MingMin Lu, XiaoWei Tian, XinChao Yang, Cheng Yuan, Muhammad Ehsan, XinChao Liu, RuoFeng Yan, LiXin Xu, XiaoKai Song, XiangRui Li
BACKGROUND: Hco-gal-m is a tandem-repeat galectin isolated from the adult worm of Haemonchus contortus. A growing body of studies have demonstrated that Hco-gal-m could exert its immunomodulatory effects on host peripheral blood mononuclear cells (PBMC) to facilitate the immune evasion. Our previous work revealed that C-terminal and N-terminal carbohydrate recognition domains (CRD) of Hco-gal-m had different sugar binding abilities. However, whether different domains of Hco-gal-m account differently for its multiple immunomodulatory functions in the host-parasite interaction remains to be elucidated...
September 5, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28860929/cd300lg-improves-the-cytotoxic-activity-of-cik
#18
Qiuyue Wang, Yuqing Liu, Ying Chen, Ke Wang, Wensheng Xie, Dapeng Wei, Lijuan Hu
To investigate the effect of CD300LG-γ induction on the cytotoxic activity of CIK. Eukaryotic expression plasmid hCD300LG-γ/pEGFP-C3, which can express human CD300LG-γ, was constructed and transfected into CHO cells by lipofectamine. The expression of CD300LG-γ was confirmed by immunofluorescence, RT-PCR, and Western Blot. To produce CIK cells, human peripheral blood mononuclear cells (PBMC) were isolated and induced, respectively, by cell lysates extracted from hCD300LG-γ/CHO cells, pEGFP-C3/CHO cells, and CHO cells, concurrently with the standard CIK inductive agent...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28836673/evaluation-of-gene-expression-levels-for-cytokines-in-ocular-toxoplasmosis
#19
M M Maia, C S Meira-Strejevitch, V L Pereira-Chioccola, D D C de Hippólito, V O Silva, C C Brandão de Mattos, F B Frederico, R C Siqueira, L C de Mattos
This study evaluated levels for mRNA expression of 7 cytokines in ocular toxoplasmosis. Peripheral blood mononuclear cells (PBMC) of patients with ocular toxoplasmosis (OT Group, n = 23) and chronic toxoplasmosis individuals (CHR Group, n = 9) were isolated and stimulated in vitro with T. gondii antigen. Negative controls (NC) were constituted of 7 PBMC samples from individuals seronegative for toxoplasmosis. mRNA expression for cytokines was determined by qPCR. Results showed a significant increase in mRNA levels from antigen stimulated PBMCs derived from OT Group for expressing IL-6 (at P < ...
October 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28835578/altered-immune-responses-in-broiler-chicken-husbandry-workers-and-their-association-with-endotoxin-exposure
#20
Ravi Gautam, Yong Heo, GyeongDong Lim, EunSeob Song, Katharine Roque, JaeHee Lee, YeonGyeong Kim, AhRang Cho, SoJung Shin, ChangYul Kim, GiHwan Bang, JiYun Bahng, HyoungAh Kim
Exposure to bioaerosols in indoor animal farms associates with respiratory illnesses, but little is known about the immune modulation to chicken farmers. This study aimed to compare the general immunity of chicken farmers with those of control subjects with non-agricultural jobs. Blood taken from the farmers and controls was subjected to plasma IgE and IgG subclass measurements. Isolated peripheral blood mononuclear cells (PBMC) were stimulated and cytokine production was measured. Indoor total and respirable dust levels and their endotoxin (LPS) and aflatoxin (AF) levels in the farms were measured...
August 22, 2017: Industrial Health
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