keyword
MENU ▼
Read by QxMD icon Read
search

T cell immunity

keyword
https://www.readbyqxmd.com/read/29913322/culture-supernatants-of-oral-cancer-cells-induce-impaired-ifn-%C3%AE-production-of-pdcs-partly-through-the-down-regulation-of-tlr-9-expression
#1
Nannan Han, Zun Zhang, Houyu Jv, Jingzhou Hu, Min Ruan, Chenping Zhang
OBJECTIVES: The aim of the present study was to investigate whether tumor-derived supernatants down-regulate the immune function of plasmacytoid dendritic cells (pDCs) in oral cancer and the potential molecular mechanisms of this effect. MATERIALS AND METHODS: Immunohistochemistry (IHC) and flow cytometry were used to detect tumor-infiltrating and peripheral blood pDCs. MTS and flow cytometry were employed to evaluate the immune response of CD4+ T cells. Real-time PCR and ELISA assays were used to identify TLR-7 and TLR-9 expression, IFN-α production and tumor-secreted soluble cytokines...
June 5, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29913309/the-causes-and-consequences-of-variation-in-human-cytokine-production-in-health
#2
REVIEW
Melanie Schirmer, Vinod Kumar, Mihai G Netea, Ramnik J Xavier
Cytokines are important cell-signaling molecules that activate and modulate immune responses. Major factors influencing cytokine variation in healthy individuals are host genetics, non-heritable factors and the microbiome. Genetic variation accounts for a significant part of heterogeneity in cytokine production by peripheral blood mononuclear cells. Variation in cytokines such as IL-6 and IL-6Ra is strongly influenced by heritability, suggesting an evolutionarily pressure for their genetic regulation that potentially contributes to differences in immune responsiveness between human populations...
June 15, 2018: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29913200/increased-t-cell-immunosenescence-and-accelerated-maturation-phenotypes-in-older-kidney-transplant-recipients
#3
J M Schaenman, M Rossetti, T Sidwell, V Groysberg, G Sunga, Y Korin, E Liang, X Zhou, B Abdallah, E Lum, S Bunnapradist, T Pham, G Danovitch, E F Reed
Older kidney transplant recipients experience increased rates of infection and death, and less rejection, compared with younger patients. However, little is known about immune dysfunction in older compared with younger kidney transplant recipients and whether it is associated with infection. We evaluated T cell phenotypes including maturation, immune senescence, and exhaustion in a novel investigation into differences in older compared with younger patients receiving identical immune suppression regimens. We evaluated PBMC from 60 kidney transplant recipients (23 older and 37 matched younger patients) by multiparameter immune phenotyping...
June 15, 2018: Human Immunology
https://www.readbyqxmd.com/read/29913109/specific-t-cell-induction-using-iron-oxide-based-nanoparticles-as-subunit-vaccine-adjuvant
#4
Lázaro Moreira Marques Neto, Nicholas Zufelato, Ailton Antônio de Sousa-Júnior, Monalisa Martins Trentini, Adeliane Castro da Costa, Andris Figueiroa Bakuzis, André Kipnis, Ana Paula JunqueiraKipnis
Metal-based nanoparticles (NPs) stimulate innate immunity; however, they have never been demonstrated to be capable of aiding the generation of specific cellular immune responses. Therefore, our objective was to evaluate whether iron oxide-based NPs have adjuvant properties in generating cellular Th1, Th17 and TCD8 (Tc1) immune responses. For this purpose, a fusion protein (CMX) composed of Mycobacterium tuberculosis antigens was used as a subunit vaccine. Citrate-coated MnFe2 O4 NPs were synthesized by co-precipitation and evaluated by transmission electron microscopy...
June 18, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29913039/regulatory-t-cells-from-allo-to-xenotransplantation-opportunities-and-challenges
#5
REVIEW
Mohamed B Ezzelarab
Regulatory T cells (Treg) are currently being evaluated in clinical allotransplantation for tolerance induction, with proven safety in humans with autoimmune diseases and graft-versus-host disease. A considerable amount of recent data suggests that additional factors may need to be validated, including the stability and commitment of newly discovered Treg subsets under inflammatory conditions, to further warrant safe and effective Treg-based therapeutic approaches. This review explores the opportunities and challenges of Treg-based cell therapy in xenotransplantation...
May 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29912986/a-recombinant-herpesviral-vector-containing-a-near-full-length-sivmac239-genome-produces-siv-particles-and-elicits-immune-responses-to-all-nine-siv-gene-products
#6
Young C Shin, Georg F Bischof, William A Lauer, Lucas Gonzalez-Nieto, Eva G Rakasz, Gregory M Hendricks, David I Watkins, Mauricio A Martins, Ronald C Desrosiers
The properties of the human immunodeficiency virus (HIV) pose serious difficulties for the development of an effective prophylactic vaccine. Here we describe the construction and characterization of recombinant (r), replication-competent forms of rhesus monkey rhadinovirus (RRV), a gamma-2 herpesvirus, containing a near-full-length (nfl) genome of the simian immunodeficiency virus (SIV). A 306-nucleotide deletion in the pol gene rendered this nfl genome replication-incompetent as a consequence of deletion of the active site of the essential reverse transcriptase enzyme...
June 18, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29912964/rd5-mediated-lack-of-pe_pgrs-and-ppe-mptr-export-in-bcg-vaccine-strains-results-in-strong-reduction-of-antigenic-repertoire-but-little-impact-on-protection
#7
Louis S Ates, Fadel Sayes, Wafa Frigui, Roy Ummels, Merel P M Damen, Daria Bottai, Marcel A Behr, Jeroen W J van Heijst, Wilbert Bitter, Laleh Majlessi, Roland Brosch
Tuberculosis is the deadliest infectious disease worldwide. Although the BCG vaccine is widely used, it does not efficiently protect against pulmonary tuberculosis and an improved tuberculosis vaccine is therefore urgently needed. Mycobacterium tuberculosis uses different ESX/Type VII secretion (T7S) systems to transport proteins important for virulence and host immune responses. We recently reported that secretion of T7S substrates belonging to the mycobacteria-specific Pro-Glu (PE) and Pro-Pro-Glu (PPE) proteins of the PGRS (polymorphic GC-rich sequences) and MPTR (major polymorphic tandem repeat) subfamilies required both a functional ESX-5 system and a functional PPE38/71 protein for secretion...
June 18, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29912899/association-of-hogg1-ser326cys-itga2-c807t-tnf-a-308g-a-and-xpd-lys751gln-polymorphisms-with-the-survival-of-malaysian-npc-patients
#8
Eng-Zhuan Ban, Munn-Sann Lye, Pei Pei Chong, Yoke-Yeow Yap, Siew Ying Crystale Lim, Hejar Abdul Rahman
BACKGROUND: Nasopharyngeal carcinoma is a rare form of cancer across the world except in certain areas such as Southern China, Hong Kong and Malaysia. NPC is considered a relatively radiosensitive tumor and patients diagnosed at early stages tend to survive longer compared to those with advanced disease. Given that early symptoms of NPC are non-specific and that the nasopharynx is relatively inaccessible, less invasive screening methods such as biomarker screening might be the key to improve NPC survival and management...
2018: PloS One
https://www.readbyqxmd.com/read/29912725/tumor-regression-and-cure-depends-on-sustained-th1-responses
#9
Min Dai, Ingegerd Hellstrom, Yuen Y Yip, Hans Olov Sjögren, Karl Erik Hellstrom
While immunomodulatory monoclonal antibodies (mAbs) have therapeutic efficacy against many tumors, few patients are cured. Attempting to improve their therapeutic efficacy we have applied the TC1 mouse lung carcinoma model and injected established subcutaneous tumors intratumorally with 3 weekly doses of various combinations of mAbs. Combinations of mAbs to CTLA4/PD1/CD137 (the 3 mAb combination) and to CTLA4/PD1/CD137/CD19 (the 4 mAb combination) were most efficacious to induce complete regression of both the injected tumor and an untreated tumor in the same mouse...
June 15, 2018: Journal of Immunotherapy
https://www.readbyqxmd.com/read/29912595/ionizing-radiation-reduces-the-capacity-of-activated-macrophages-to-induce-t-cell-proliferation-but-does-not-trigger-dendritic-cell-mediated-non-targeted-effects
#10
Roland Wunderlich, Paul Friedrich Rühle, Lisa Deloch, Franz Roedel, Rainer Fietkau, Udo S Gaipl, Benjamin Frey
PURPOSE: Previous investigations revealed influences of irradiation up to 2.0 Gy on the cytokine secretion profile of inflammatory, peritoneal mouse macrophages (pMФ). This raised the question if those alterations impact on dendritic cells and consecutive T-cell responses. Further, the impact of irradiation directly on pMФ capacity to induce T-cell responses was analyzed. MATERIALS AND METHODS: pMФ were LPS-activated, irradiated and the expression of activation markers was assessed...
June 18, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29912453/induction-of-cross-clade-antibody-and-t-cell-responses-by-an-mva-based-influenza-h5n1-vaccine-in-a-randomized-phase-i-iia-clinical-trial
#11
Rory D de Vries, Arwen F Altenburg, Nella J Nieuwkoop, Erwin de Bruin, Stella E van Trierum, Mark R Pronk, Mart M Lamers, Mathilde Richard, David F Nieuwenhuijse, Marion P G Koopmans, Joost H C M Kreijtz, Ron A M Fouchier, Albert D M E Osterhaus, Gerd Sutter, Guus F Rimmelzwaan
Background: Highly pathogenic avian influenza viruses continue to circulate in poultry and wild birds and occasionally infect humans, sometimes with fatal outcome. Development of vaccines is a priority to prepare for potential pandemics, however complicated by antigenic variation of the surface glycoprotein hemagglutinin. We report the immunological profile induced by human immunization with Modified Vaccinia virus Ankara expressing the hemagglutinin gene of H5N1 virus A/Vietnam/1194/04 (rMVA-H5)...
April 18, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29912283/immune-evasive-gene-switch-enables-regulated-delivery-of-chondroitinase-after-spinal-cord-injury
#12
Emily R Burnside, Fred De Winter, Athanasios Didangelos, Nicholas D James, Elena-Cristina Andreica, Hugo Layard-Horsfall, Elizabeth M Muir, Joost Verhaagen, Elizabeth J Bradbury
Chondroitinase ABC is a promising preclinical therapy that promotes functional neuroplasticity after CNS injury by degrading extracellular matrix inhibitors. Efficient delivery of chondroitinase ABC to the injured mammalian spinal cord can be achieved by viral vector transgene delivery. This approach dramatically modulates injury pathology and restores sensorimotor functions. However, clinical development of this therapy is limited by a lack of ability to exert control over chondroitinase gene expression. Prior experimental gene regulation platforms are likely to be incompatible with the non-resolving adaptive immune response known to occur following spinal cord injury...
June 14, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29912184/isolation-protocol-of-mouse-monocyte-derived-dendritic-cells-and-their-subsequent-in-vitro-activation-with-tumor-immune-complexes
#13
Nadine Santana-Magal, Diana Rasoulouniriana, Corey Saperia, Amit Gutwillig, Peleg Rider, Edgar G Engleman, Yaron Carmi
Dendritic cells (DC) are heterogeneous cell populations that differ in their cell membrane markers, migration patterns and distribution, and in their antigen presentation and T cell activation capacities. Since most vaccinations of experimental tumor models require millions of DC, they are widely isolated from the bone marrow or spleen. However, these DC significantly differ from blood and tumor DC in their responses to immune complexes (IC), and presumably to other Syk-coupled lectin receptors. Importantly, given the sensitivity of DC to danger-associated molecules, the presence of endotoxins or antibodies that crosslink activation receptors in one of the isolating steps could result in the priming of DC and thus affect the parameters, or at least the dosage, required to activate them...
May 31, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29912065/increased-degranulation-of-immune-cells-is-associated-with-higher-cervical-viral-load-in-hiv-infected-women
#14
Vandana Saxena, Manisha Ghate, Shubhangi Bichare, Ishrat Khan, Raj Majumdar, Mansa Angadi, Smita Kulkarni, Ramesh Paranjape, Madhuri Rajeev Thakar
OBJECTIVE: The activation of effector immune cells at the cervicovaginal mucosa (CVM) might influence the cervical HIV load and thus the secondary transmission; however limited information is available about the innate effector cells at CVM during HIV infection. In this study we quantified and assessed the activation of the effector immune cells at the CVM of HIV infected women with different disease outcomes: non-progressive HIV disease (LTNPs) and chronic HIV-infected (CHI) and their relationship with cervical viral shedding...
June 14, 2018: AIDS
https://www.readbyqxmd.com/read/29911996/altered-immune-cell-follicular-dynamics-in-hiv-infection-following-influenza-vaccination
#15
Eirini Moysi, Suresh Pallikkuth, Leslie R De Armas, Louis E Gonzalez, David Ambrozak, Varghese George, David Huddleston, Rajendra Pahwa, Richard A Koup, Constantinos Petrovas, Savita Pahwa
HIV infection changes the lymph node (LN) tissue architecture, potentially impairing the immunologic response to antigenic challenge. The tissue-resident immune cell dynamics in virologically suppressed HIV+ patients on combination antiretroviral therapy (cART) are not clear. We obtained LN biopsies before and 10 to 14 days after trivalent seasonal influenza immunization from healthy controls (HCs) and HIV+ volunteers on cART to investigate CD4+ T follicular helper (Tfh) and B cell dynamics by flow cytometry and quantitative imaging analysis...
June 18, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29911696/plasmid-dna-vaccines-where-are-we-now
#16
F Ghaffarifar
DNA vaccines are considered as third-generation vaccines. The recombinant DNA technology plays an important role in the production of DNA vaccines. These vaccines are intended to increase DNA insertion and translation in the cell, activate CD4+ T cells, and enhance cytotoxic T-lymphocyte induction and antibody production. DNA vaccines are safe with few side effects in humans and animals. Their immunogenicity can be improved by the use of suitable adjuvants and proper delivery systems. In recent years, strategies have been developed to increase the efficacy of DNA vaccines through electroporation, as well as the use of cytokines, genetically engineered vectors, liposomes, and micro- or nanoparticles...
May 2018: Drugs of Today
https://www.readbyqxmd.com/read/29911257/characterization-of-a-srs13-a-new-cyst-wall-mucin-like-domain-containing-protein
#17
Tadakimi Tomita, Yanfen Ma, Louis Weiss
Toxoplasma gondii, an obligate intracellular apicomplexan, causes latent infection in about one third of the human population. During latent infection, T. gondii bradyzoites are found within cysts, a modified parasitophorous vacuole. This parasite has a large family of SRS (surface antigen-1 related sequence) proteins which are reported to be involved in attachment of these organisms to their mammalian host cells and in immune subversion during latent infection. We have identified a novel mucin domain containing SRS protein, using a glycoepitope-specific antibody, which recognizes the cyst wall...
May 30, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29911121/prediction-of-t-cell-epitopes-for-designing-a-reverse-vaccine-against-streptococcal-bacteria
#18
Samira Ebrahimi, Hassan Mohabatkar
Streptococcal bacteria are among dangerous human pathogens with major prevalence worldwide. A good vaccine against streptococcal bacteria should have epitopes that confer protection from infection by different streptococcal bacteria types. we aimed was to recognize the most immunogenic and conserved epitopes of streptococcal bacteria, which could be a potential candidate for vaccine development. Nineteen different M proteins of different streptococcal bacteria were chosen and analyzed. Nine-mer epitopes able to simulate both cells mediate and humoral immunity were predicted...
March 2018: Molecular Biology Research Communications
https://www.readbyqxmd.com/read/29910815/-toxoplasma-chinese-1-strain-of-wh3%C3%AE-rop16-i-iii-gra15-ii-genetic-background-contributes-to-abnormal-pregnant-outcomes-in-murine-model
#19
Cong Wang, Weisheng Cheng, Qian Yu, Tian Xing, Shoubin Chen, Lei Liu, Li Yu, Jian Du, Qingli Luo, Jilong Shen, Yuanhong Xu
Toxoplasma gondii infection evokes a strong Th1-type response with interleukin (IL)-12 and interferon (IFN)-γ secretion. Recent studies suggest that the infection of pregnant mice with T. gondii may lead to adverse pregnancy results caused by subversion of physiological immune tolerance at maternofetal interface rather than direct invasion of the parasite. Genotype-associated dense granule protein GRA15II tends to induce classically activated macrophage (M1) differentiation and subsequently activating NK, Th1, and Th17 cells whereas rhoptry protein ROP16I/III drives macrophages to alternatively activated macrophage (M2) polarization and elicits Th2 immune response...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29910814/the-role-of-natural-killer-group-2-member-d-in-chronic-inflammation-and-autoimmunity
#20
REVIEW
Marina Babic, Chiara Romagnani
Current medicine and medical science puts great effort into elucidating the basis of chronicity and finding appropriate treatments for inflammatory diseases; however, the mechanisms driving aberrant immune responses are mostly unknown and deserve further study. Of particular interest is the identification of checkpoints that regulate the function and differentiation of pro-inflammatory cells during pathogenesis, along with means of their modulation for therapeutic purposes. Natural killer group 2, member D (NKG2D) is a potent activator of the immune system, known as a sensor for "induced-self" ligands, i...
2018: Frontiers in Immunology
keyword
keyword
65323
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"