keyword
MENU ▼
Read by QxMD icon Read
search

"Cross presentation"

keyword
https://www.readbyqxmd.com/read/28102523/the-effect-of-superparamagnetic-iron-oxide-nanoparticle-surface-charge-on-antigen-cross-presentation
#1
Yongbin Mou, Yun Xing, Hongyan Ren, Zhihua Cui, Yu Zhang, Guangjie Yu, Walter J Urba, Qingang Hu, Hongming Hu
Magnetic nanoparticles (NPs) of superparamagnetic iron oxide (SPIO) have been explored for different kinds of applications in biomedicine, mechanics, and information. Here, we explored the synthetic SPIO NPs as an adjuvant on antigen cross-presentation ability by enhancing the intracellular delivery of antigens into antigen presenting cells (APCs). Particles with different chemical modifications and surface charges were used to study the mechanism of action of antigen delivery. Specifically, two types of magnetic NPs, γFe2O3/APTS (3-aminopropyltrimethoxysilane) NPs and γFe2O3/DMSA (meso-2, 3-Dimercaptosuccinic acid) NPs, with the same crystal structure, magnetic properties, and size distribution were prepared...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28090699/modelling-irf8-deficient-human-hematopoiesis-and-dendritic-cell-development-with-engineered-ips-cells
#2
Stephanie Sontag, Malrun Förster, Jie Qin, Paul Wanek, Saskia Mitzka, Herdit M Schüler, Steffen Koschmieder, Stefan Rose-John, Kristin Seré, Martin Zenke
Human induced pluripotent stem (iPS) cells can differentiate into cells of all three germ layers, including hematopoietic stem cells and their progeny. Interferon regulatory factor 8 (IRF8) is a transcription factor, which acts in hematopoiesis as lineage determining factor for myeloid cells, including dendritic cells (DC). Autosomal recessive or dominant IRF8 mutations occurring in patients cause severe monocytic and DC immunodeficiency. To study IRF8 in human hematopoiesis we generated human IRF8-/- iPS cells and IRF8-/- embryonic stem (ES) cells using RNA guided CRISPR/Cas9n genome editing...
January 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28090319/the-role-of-liver-sinusoidal-cells-in-local-hepatic-immune-surveillance
#3
REVIEW
Dirk Wohlleber, Percy A Knolle
Although the liver's function as unique immune organ regulating immunity has received a lot of attention over the last years, the mechanisms determining hepatic immune surveillance against infected hepatocytes remain less well defined. Liver sinusoidal cells, in particular, liver sinusoidal endothelial cells (LSECs) and Kupffer cells (KCs), serve as physical platform for recruitment and anchoring of blood-borne immune cells in the liver. Liver sinusoidal cells also function as portal of entry for infectious microorganisms targeting the liver such as hepatotropic viruses, bacteria or parasites...
December 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28077434/transfer-of-allogeneic-cd4-t-cells-rescues-cd8-t-cells-in-anti-pd-l1-resistant-tumors-leading-to-tumor-eradication
#4
Ainhoa Arina, Theodore G Karrison, Eva Galka, Karin Schreiber, Ralph R Weichselbaum, Hans Schreiber
Adoptively transferred CD8(+) T cells can stabilize the size of solid tumors over long periods of time by exclusively recognizing antigen cross-presented on tumor stroma. However, these tumors eventually escape T cell-mediated growth control. The aim of this study was to eradicate such persistent cancers. In our model, the SIYRYYGL antigen is expressed by cancer cells that lack the MHC-I molecule K(b) needed for direct presentation, but the antigen is picked up and cross-presented by tumor stroma. A single injection of antigen-specific 2C CD8(+) T cells caused long-term inhibition of tumor growth, but without further intervention, tumors started to progress after approximately 3 months...
January 11, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28077213/inhibition-of-dopamine-receptor-d3-signaling-in-dendritic-cells-increases-antigen-cross-presentation-to-cd8-t-cells-favoring-anti-tumor-immunity
#5
Claudio Figueroa, Felipe Gálvez-Cancino, Cesar Oyarce, Francisco Contreras, Carolina Prado, Catalina Valeria, Sebastián Cruz, Alvaro Lladser, Rodrigo Pacheco
Dendritic cells (DCs) display the unique ability for cross-presenting antigens to CD8(+) T-cells, promoting their differentiation into cytotoxic T-lymphocytes (CTLs), which play a pivotal role in anti-tumor immunity. Emerging evidence points to dopamine receptor D3 (D3R) as a key regulator of immunity. Accordingly, we studied how D3R regulates DCs function in anti-tumor immunity. The results show that D3R-deficiency in DCs enhanced expansion of CTLs in vivo and induced stronger anti-tumor immunity. Co-culture experiments indicated that D3R-inhibition in DCs potentiated antigen cross-presentation and CTLs activation...
January 2, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28077081/antigen-presenting-capacity-of-murine-splenic-myeloid-cells
#6
Ying-Ying Hey, Benjamin Quah, Helen C O'Neill
BACKGROUND: The spleen is an important site for hematopoiesis. It supports development of myeloid cells from bone marrow-derived precursors entering from blood. Myeloid subsets in spleen are not well characterised although dendritic cell (DC) subsets are clearly defined in terms of phenotype, development and functional role. Recently a novel dendritic-like cell type in spleen named 'L-DC' was distinguished from other known dendritic and myeloid cells by its distinct phenotype and developmental origin...
January 11, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28032353/allergooncology-the-impact-of-allergy-in-oncology-eaaci-position-paper
#7
E Jensen-Jarolim, H J Bax, R Bianchini, M Capron, C Corrigan, M Castells, D Dombrowicz, T R Daniels-Wells, J Fazekas, E Fiebiger, S Gatault, H J Gould, J Janda, D H Josephs, P Karagiannis, F Levi-Schaffer, A Meshcheryakova, D Mechtcheriakova, Y Mekori, F Mungenast, E A Nigro, M L Penichet, F Redegeld, L Saul, J Singer, J F Spicer, A G Siccardi, E Spillner, M C Turner, E Untersmayr, L Vangelista, S N Karagiannis
Th2 immunity and allergic immune surveillance play critical roles in host responses to pathogens, parasites and allergens. Numerous studies have reported significant links between Th2 responses and cancer, including insights into the functions of IgE antibodies and associated effector cells in both anti-tumour immune surveillance and therapy. The interdisciplinary field of AllergoOncology was given Task Force status by the European Academy of Allergy and Clinical Immunology in 2014. Affiliated expert groups focus on the interface between allergic responses and cancer, applied to immune surveillance, immunomodulation and the functions of IgE-mediated immune responses against cancer, to derive novel insights into more effective treatments...
December 29, 2016: Allergy
https://www.readbyqxmd.com/read/28025060/liver-sinusoidal-endothelial-cell-cross-priming-is-supported-by-cd4-t-cell-derived-il-2
#8
Michaela Wittlich, Michael Dudek, Jan P Böttcher, Oliver Schanz, Silke Hegenbarth, Tobias Bopp, Edgar Schmitt, Christian Kurts, Christoph Garbers, Stefan Rose John, Percy A Knolle, Dirk Wohlleber
BACKGROUND AND AIMS: Liver sinusoidal endothelial cells (LSECs) are prominent liver-resident antigen (cross-)presenting cells. LSEC cross-priming of naïve CD8 T cells does not require CD4 T cell help in contrast to priming by dendritic cells (DC) but leads to formation of memory T cells that is preceded by transient GzmB expression. Here we provide evidence for a so far unrecognized CD4 T helper cell-function in LSEC-induced CD8 T cell-activation. METHODS: Naïve CD8 T cells and differentiated T helper 1 (Th1) cells were stimulated by antigen-presenting LSEC and GzmB expression in CD8 T cells was determined by flow cytometry...
December 23, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/28024184/serpinb9-is-a-marker-of-antigen-cross-presenting-dendritic-cells
#9
M S Mangan, J Vega-Ramos, L T Joeckel, A J Mitchell, A Rizzitelli, B Roediger, D Kaiserman, W W Weninger, J A Villadangos, P I Bird
Serpinb9 (Sb9, also called Spi6) is an intracellular inhibitor of granzyme B (grB) that protects cytotoxic lymphocytes from grB-mediated death. In addition, Sb9 is also expressed in accessory immune cells, including dendritic cells (DCs), although its role is debated. Recently, we have demonstrated that Sb9 plays a grB-independent role in cross-presentation of antigens by CD8(+) DCs. Here, using a mouse line expressing green fluorescent protein knocked in under the control of the Sb9 promoter, we demonstrate that Sb9 expression is highest in those tissue-resident and migratory DC subsets capable of cross-presentation...
December 23, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/28018989/the-intersection-of-radiotherapy-and-immunotherapy-mechanisms-and-clinical-implications
#10
Michael Spiotto, Yang-Xin Fu, Ralph R Weichselbaum
By inducing DNA damage, radiotherapy both reduces tumor burden and enhances anti-tumor immunity. Here, we will review the mechanisms by which radiation induces anti-tumor immune responses that can be augmented using immunotherapies to facilitate tumor regression. Radiotherapy increases inflammation in tumors by activating the NF-κB and the Type I interferon response pathways to induce expression of pro-inflammatory cytokines. This inflammation coupled with antigen release from irradiated cells facilitates dendritic cell maturation and cross-presentation of tumor antigens to prime tumor-specific T cell responses...
September 2016: Science Immunology
https://www.readbyqxmd.com/read/28011934/exogenous-il-33-restores-dendritic-cell-activation-and-maturation-in-established-cancer
#11
Donye Dominguez, Cong Ye, Zhe Geng, Siqi Chen, Jie Fan, Lei Qin, Alan Long, Long Wang, Zhuoli Zhang, Yi Zhang, Deyu Fang, Timothy M Kuzel, Bin Zhang
The role of IL-33, particularly in tumor growth and tumor immunity, remains ill-defined. We show that exogenous IL-33 can induce robust antitumor effect through a CD8(+) T cell-dependent mechanism. Systemic administration of rIL-33 alone was sufficient to inhibit growth of established tumors in transplant and de novo melanoma tumorigenesis models. Notably, in addition to a direct action on CD8(+) T cell expansion and IFN-γ production, rIL-33 therapy activated myeloid dendritic cells (mDCs) in tumor-bearing mice, restored antitumor T cell activity, and increased Ag cross-presentation within the tumor microenvironment...
December 23, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27986552/combining-different-types-of-multifunctional-liposomes-loaded-with-ammonium-bicarbonate-to-fabricate-microneedle-arrays-as-a-vaginal-mucosal-vaccine-adjuvant-dual-delivery-system-vadds
#12
Ning Wang, Yuanyuan Zhen, Yiguang Jin, Xueting Wang, Ning Li, Shaohong Jiang, Ting Wang
To develop effective mucosal vaccines, two types of multifunctional liposomes, the mannosylated lipid A-liposomes (MLLs) with a size of 200nm and the stealth lipid A-liposomes (SLLs) of 50nm, both loaded with a model antigen and NH4HCO3, were fabricated together into microneedles, forming the proSLL/MLL-constituted microneedle array (proSMMA), which upon rehydration dissolved rapidly recovering the initial MLLs and SLLs. Mice vaccinated with proSMMAs by vaginal mucosa patching other than conventional intradermal administration established robust antigen-specific humoral and cellular immunity at both systemic and mucosal levels, especially, in the reproductive and intestinal ducts...
December 13, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27978488/antibody-mediated-targeting-of-antigen-to-c-type-lectin-like-receptors-clec9a-and-clec12a-elicits-different-vaccination-outcomes
#13
Christophe Macri, Claire Dumont, Scott Panozza, Mireille H Lahoud, Irina Caminschi, Jose A Villadangos, Angus P R Johnston, Justine D Mintern
Targeting antigen (Ag) to dendritic cell (DC) surface receptors is a potential new mode of vaccination. C-type lectin-like receptors Clec9A and Clec12A are attractive receptor targets however their targeting in vivo elicits significantly different outcomes for unknown reasons. To gain insight into the mechanisms responsible, we have examined the intrinsic capacity of Clec9A and Clec12A to elicit MHC I and MHC II Ag presentation following ex vivo targeting with primary murine DC. Both receptors exhibited high rates of internalization by CD8(+) DCs, while Clec12A delivered a significantly higher Ag owing to its higher expression level...
January 2017: Molecular Immunology
https://www.readbyqxmd.com/read/27974697/surrogate-in-vitro-activation-of-innate-immunity-synergizes-with-interleukin-7-to-unleash-rapid-antigen-driven-outgrowth-of-cd4-and-cd8-human-peripheral-blood-t-cells-naturally-recognizing-muc1-her2-neu-and-other-tumor-associated-antigens
#14
Latha B Pathangey, Dustin B McCurry, Sandra J Gendler, Ana L Dominguez, Jessica E Gorman, Girish Pathangey, Laurie A Mihalik, Yushe Dang, Mary L Disis, Peter A Cohen
Effective adoptive immunotherapy has proved elusive for many types of human cancer, often due to difficulties achieving robust expansion of natural tumor-specific T-cells from peripheral blood. We hypothesized that antigen-driven T-cell expansion might best be triggered in vitro by acute activation of innate immunity to mimic a life-threatening infection. Unfractionated peripheral blood mononuclear cells (PBMC) were subjected to a two-step culture, first synchronizing their exposure to exogenous antigens with aggressive surrogate activation of innate immunity, followed by γ-chain cytokine-modulated T-cell hyperexpansion...
December 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926855/temporally-programmed-cd8%C3%AE-dc-activation-enhances-combination-cancer-immunotherapy
#15
Alice Tzeng, Monique J Kauke, Eric F Zhu, Kelly D Moynihan, Cary F Opel, Nicole J Yang, Naveen Mehta, Ryan L Kelly, Gregory L Szeto, Willem W Overwijk, Darrell J Irvine, K Dane Wittrup
Numerous synergistic cancer immunotherapy combinations have been identified, but the effects of relative dose timing are rarely considered. In established syngeneic mouse tumor models, we found that staggering interferon-α (IFNα) administration after, rather than before or simultaneously with, serum-persistent interleukin-2 (IL-2) and tumor-specific antibody significantly increased long-term survival. Successful combination therapy required IFNα-induced activation of cross-presenting CD8α(+) dendritic cells (DCs) following the release of antigenic tumor debris by the IL-2- and antibody-mediated immune response...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27899443/rab43-facilitates-cross-presentation-of-cell-associated-antigens-by-cd8%C3%AE-dendritic-cells
#16
Nicole M Kretzer, Derek J Theisen, Roxane Tussiwand, Carlos G Briseño, Gary E Grajales-Reyes, Xiaodi Wu, Vivek Durai, Jörn Albring, Prachi Bagadia, Theresa L Murphy, Kenneth M Murphy
In this study, to examine cross-presentation by classical dendritic cells (DCs; cDCs), we evaluated the role of RAB43, a protein found to be selectively expressed by Batf3-dependent CD8α(+) and CD103(+) compared with other DC subsets and immune lineages. Using a specific monoclonal antibody, we localized RAB43 expression to the Golgi apparatus and LAMP1(-) cytoplasmic vesicles. Mice with germline or conditional deletion of Rab43 are viable and fertile and have normal development of cDCs but show a defect for in vivo and in vitro cross-presentation of cell-associated antigen...
December 12, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27872208/blocking-virus-replication-during-acute-murine-cytomegalovirus-infection-paradoxically-prolongs-antigen-presentation-and-increases-the-cd8-t-cell-response-by-preventing-type-i-ifn-dependent-depletion-of-dendritic-cells
#17
Christopher P Loo, Christopher M Snyder, Ann B Hill
Increasing amounts of pathogen replication usually lead to a proportionate increase in size and effector differentiation of the CD8(+) T cell response, which is attributed to increased Ag and inflammation. Using a murine CMV that is highly sensitive to the antiviral drug famciclovir to modulate virus replication, we found that increased virus replication drove increased effector CD8(+) T cell differentiation, as expected. Paradoxically, however, increased virus replication dramatically decreased the size of the CD8(+) T cell response to two immunodominant epitopes...
January 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27871362/actin-is-an-evolutionarily-conserved-damage-associated-molecular-pattern-that-signals-tissue-injury-in-drosophila-melanogaster
#18
Naren Srinivasan, Oliver Gordon, Susan Ahrens, Anna Franz, Safia Deddouche, Probir Chakravarty, David Phillips, Ali A Yunus, Michael K Rosen, Rita S Valente, Luis Teixeira, Barry Thompson, Marc S Dionne, Will Wood, Caetano Reis e Sousa
Damage-associated molecular patterns (DAMPs) are molecules released by dead cells that trigger sterile inflammation and, in vertebrates, adaptive immunity. Actin is a DAMP detected in mammals by the receptor, DNGR-1, expressed by dendritic cells (DCs). DNGR-1 is phosphorylated by Src-family kinases and recruits the tyrosine kinase Syk to promote DC cross-presentation of dead cell-associated antigens. Here we report that actin is also a DAMP in invertebrates that lack DCs and adaptive immunity. Administration of actin to Drosophila melanogaster triggers a response characterised by selective induction of STAT target genes in the fat body through the cytokine Upd3 and its JAK/STAT-coupled receptor, Domeless...
22, 2016: ELife
https://www.readbyqxmd.com/read/27867197/p38%C3%AE-has-an-important-role-in-antigen-cross-presentation-by-dendritic-cells
#19
Yifan Zhou, Jianfeng Wu, Chunxiao Liu, Xueheng Guo, Xinyi Zhu, Yuan Yao, Yuhao Jiao, Peng He, Jiahuai Han, Li Wu
The role of the p38 signaling pathway in the innate and adaptive immune responses has been well documented, especially in inflammatory cytokine production by dendritic cells (DCs). However, whether the p38 signaling pathway affects the important antigen (Ag) presentation function of DCs remains largely unknown. In this study, we reported that the deletion of p38α resulted in an impaired cross-presentation ability of CD8(+) conventional DCs (cDCs) and a reduction in the direct presentation ability of CD8(-) cDCs ex vivo...
November 21, 2016: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/27861804/cd103-cd11b-salivary-gland-dendritic-cells-have-antigen-cross-presenting-capacity
#20
Lu Lu, Yukinori Tanaka, Naoto Ishii, Takashi Sasano, Shunji Sugawara
Dendritic cells (DCs) in lymphoid and non-lymphoid tissues are professional antigen-presenting cells that are essential for effective immunity and tolerance. However, the presence and characteristics of DCs in steady-state salivary glands (SGs) currently remain unknown. We herein identified CD64(-) CD11c(+) classical DCs (cDCs) as well as CD64(+) macrophages among CD45(+) MHC class II(+) antigen-presenting cells in steady-state murine SGs. SG cDCs were divided into CD103(+) CD11b(-) and CD103(-) CD11b(+) cDCs...
November 11, 2016: European Journal of Immunology
keyword
keyword
56223
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"