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migratory Dendritic cells

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https://www.readbyqxmd.com/read/29650776/lymphatic-exosomes-promote-dendritic-cell-migration-along-guidance-cues
#1
Markus Brown, Louise A Johnson, Dario A Leone, Peter Majek, Kari Vaahtomeri, Daniel Senfter, Nora Bukosza, Helga Schachner, Gabriele Asfour, Brigitte Langer, Robert Hauschild, Katja Parapatics, Young-Kwon Hong, Keiryn L Bennett, Renate Kain, Michael Detmar, Michael Sixt, David G Jackson, Dontscho Kerjaschki
Lymphatic endothelial cells (LECs) release extracellular chemokines to guide the migration of dendritic cells. In this study, we report that LECs also release basolateral exosome-rich endothelial vesicles (EEVs) that are secreted in greater numbers in the presence of inflammatory cytokines and accumulate in the perivascular stroma of small lymphatic vessels in human chronic inflammatory diseases. Proteomic analyses of EEV fractions identified >1,700 cargo proteins and revealed a dominant motility-promoting protein signature...
April 12, 2018: Journal of Cell Biology
https://www.readbyqxmd.com/read/29622848/the-hdac-inhibitor-saha-prevents-colonic-inflammation-by-suppressing-pro-inflammatory-cytokines-and-chemokines-in-dss-induced-colitis
#2
Mohmand Noor Ali, Narantsog Choijookhuu, Hideaki Takagi, Naparee Srisowanna, Mai Nguyen Nhat Huynh, Yuya Yamaguchi, Phyu Synn Oo, Myat Tin Htwe Kyaw, Katsuaki Sato, Ryoji Yamaguchi, Yoshitaka Hishikawa
Inflammatory bowel disease (IBD) is an inflammatory disorder of the gastrointestinal tract that is caused by multiple factors, including dysfunction of the immune system and genetic and epigenetic alterations. Aberrant epigenetic regulation, especially histone acetylation, was found in biopsies from IBD patients and mouse models of colitis, suggesting that an epigenetic treatment approach may be useful for IBD therapy. Therefore, we investigated the effects of the histone deacetylase (HDAC) inhibitor, suberoylanilide hydroxamic acid (SAHA), in a mouse model of dextran sulfate sodium (DSS)-induced colitis...
February 27, 2018: Acta Histochemica et Cytochemica
https://www.readbyqxmd.com/read/29611808/formation-of-retinal-direction-selective-circuitry-initiated-by-starburst-amacrine-cell-homotypic-contact
#3
Thomas A Ray, Suva Roy, Christopher Kozlowski, Jingjing Wang, Jon Cafaro, Samuel W Hulbert, Christopher V E Wright, Greg D Field, Jeremy N Kay
A common strategy by which developing neurons locate their synaptic partners is through projections to circuit-specific neuropil sublayers. Once established, sublayers serve as a substrate for selective synapse formation, but how sublayers arise during neurodevelopment remains unknown. Here we identify the earliest events that initiate formation of the direction-selective circuit in the inner plexiform layer of mouse retina. We demonstrate that radially-migrating newborn starburst amacrine cells establish homotypic contacts on arrival at the inner retina...
April 3, 2018: ELife
https://www.readbyqxmd.com/read/29563179/skin-resident-t-cells-drive-dermal-dendritic-cell-migration-in-response-to-tissue-self-antigen
#4
Niwa Ali, Bahar Zirak, Hong-An Truong, Megan M Maurano, Iris K Gratz, Abul K Abbas, Michael D Rosenblum
Migratory dendritic cell (DC) subsets deliver tissue Ags to draining lymph nodes (DLNs) to either initiate or inhibit T cell-mediated immune responses. The signals mediating DC migration in response to tissue self-antigen are largely unknown. Using a mouse model of inducible skin-specific self-antigen expression, we demonstrate that CD103+ dermal DCs (DDCs) rapidly migrate from skin to skin DLN (SDLNs) within the first 48 h after Ag expression. This window of time was characterized by the preferential activation of tissue-resident Ag-specific effector T cells (Teffs), with no concurrent activation of Ag-specific Teffs in SDLNs...
March 21, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29545628/cancer-vaccine-therapy-using-carcinoembryonic-antigen-expressing-dendritic-cells-generated-from-induced-pluripotent-stem-cells
#5
Junya Kitadani, Toshiyasu Ojima, Hiromitsu Iwamoto, Hirotaka Tabata, Mikihito Nakamori, Masaki Nakamura, Keiji Hayata, Masahiro Katsuda, Masayasu Miyajima, Hiroki Yamaue
Clinical application of dendritic cell (DC) vaccine therapy is hindered by the need for a large quantity of DCs generated from peripheral blood monocytes of the patient. We investigated whether genetically modified human induced pluripotent stem cell (iPSC)-derived dendritic cells (hiPSDCs) expressing carcinoembryonic antigen (CEA) could induce CEA-specific cytotoxic T cells in a human model and whether genetically modified mouse iPSDCs (miPSDCs) expressing CEA showed an actual antitumor effect using a CEA transgenic mouse model...
March 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29519579/a-ccr4-antagonist-enhances-dc-activation-and-homing-to-the-regional-lymph-node-and-shows-potent-vaccine-adjuvant-activity-through-the-inhibition-of-regulatory-t-cell-recruitment
#6
Shinya Yamamoto, Kazuhiko Matsuo, Daisuke Nagakubo, Shintaro Higashiyama, Keiji Nishiwaki, Naoki Oiso, Akira Kawada, Osamu Yoshie, Takashi Nakayama
CCR4 is a major chemokine receptor expressed by Treg cells that downregulate immune responses. Here, we investigated the role of CCR4-mediated Treg cell recruitment in antigen-specific immune responses. CCR4-deficient mice immunized intramuscularly with ovalbumin (OVA) showed enhanced OVA-specific IgG responses. Furthermore, intramuscular administration of OVA induced the expression of MDC/CCL22, a ligand for CCR4, in macrophages of the muscle tissues, and enhanced the recruitment of CCR4+ Treg cells in wild-type mice, whereas this recruitment of Treg cells was severely impaired in CCR4-deficient mice...
February 8, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29507107/clec9a-dendritic-cells-are-not-essential-for-antitumor-cd8-t-cell-responses-induced-by-poly-i-c-immunotherapy
#7
Connie B Gilfillan, Sabine Kuhn, Camille Baey, Evelyn J Hyde, Jianping Yang, Christiane Ruedl, Franca Ronchese
In the steady state, tumors harbor several populations of dendritic cells (DCs) and myeloid cells that are key regulators of the intratumoral immune environment. Among these cells, migratory CD103+ cross-presenting DCs are thought to be critical for tumor-specific CTL responses and tumor resistance. However, it is unclear whether this prominent role also extends to immunotherapy. We used a murine orthotopic mammary tumor model, as well as Clec9A-diphtheria toxin receptor mice that can be depleted of the specialized cross-presenting CD8α+ and CD103+ DC1 subsets, to investigate the role of these DCs in immunotherapy...
March 5, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29502294/identification-of-two-novel-host-proteins-interacting-with-toxoplasma-gondii-14-3-3-protein-by-yeast-two-hybrid-system
#8
Fa-Cai Li, Qing Liu, Hany M Elsheikha, Wen-Bin Yang, Jun-Ling Hou, Xing-Quan Zhu
Toxoplasma gondii deploys many effector proteins in order to hijack and manipulate host cell signaling pathways, allowing parasite colonization, subversion of immune responses, and disease progression. T. gondii effector protein 14-3-3 (Tg14-3-3) promotes parasite dissemination inside the body, by enhancing the migratory ability of infected microglia and dendritic cells. Understanding both the mechanism of action and the host targets of Tg14-3-3 effector is important because of their importance to the parasite's virulence...
March 3, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29468363/the-bcr-abl-inhibitor-nilotinib-influences-phenotype-and-function-of-monocyte-derived-human-dendritic-cells
#9
Daniela Dörfel, Christian J Lechner, Simone Joas, Tanja Funk, Michael Gutknecht, Julia Salih, Julian Geiger, Korbinian N Kropp, Stefanie Maurer, Martin R Müller, Hans-Georg Kopp, Helmut R Salih, Frank Grünebach, Susanne M Rittig
In chronic myeloid leukemia (CML), the translocation t(9;22) results in the fusion protein BCR-ABL (breakpoint cluster region-abelson murine leukemia), a tyrosine kinase mediating oncogenic signaling which is successfully targeted by treatment with BCR-ABL inhibitors like imatinib. However, BCR-ABL inhibitors may also affect antitumor immunity. For instance, it was reported that imatinib impairs the function of dendritic cells (DCs) that play a central role in initiating and sustaining T cell responses. Meanwhile, second generation BCR-ABL inhibitors like nilotinib, which inhibits BCR-ABL with enhanced potency have become standard of treatment, at least in patients with BCR-ABL kinase domain mutations...
February 21, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29436696/cxcr4-receptor-blockage-reduces-the-contribution-of-tumor-and-stromal-cells-to-the-metastatic-growth-in-the-liver
#10
Aitor Benedicto, Irene Romayor, Beatriz Arteta
The liver is a common site for the metastatic spread of primary malignancies including colorectal cancer, and liver metastasis is a main cause of death in cancer patients. This is due to the complexity of the interactions taking place in the liver between tumor and stromal cells. In fact, cancer‑associated fibroblasts (CAFs) have been shown to support tumor growth through the CXCL12/CXCR4 axis. However, along with cancer cells, myeloid‑derived suppressor cells (MDSCs), immature dendritic cells with immunosuppressive potential, also express CXCR4...
February 8, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29399182/use-of-antigen-primed-dendritic-cells-for-inducing-antitumor-immune-responses-in-vitro-in-patients-with-non-small-cell-lung-cancer
#11
Irina Obleukhova, Nataliya Kiryishina, Svetlana Falaleeva, Julia Lopatnikova, Vasiliy Kurilin, Vadim Kozlov, Aleksander Vitsin, Andrey Cherkasov, Ekaterina Kulikova, Sergey Sennikov
Cancer is associated with a reduction in immature and mature circulating dendritic cells (DCs), and with an impaired migratory capacity, compared with healthy donors. Therefore, modern approaches to the in vitro generation of DCs loaded with tumor antigens and their use for inducing antitumor immune responses in vivo are being investigated. The purpose of the present study was to investigate the phenotypic and functional characteristics of peripheral blood DC subsets in patients with non-small cell lung cancer (NSCLC), and the development of an antitumor cytotoxic response by mononuclear cells (MNCs) from patients using in vitro generated antigen-primed DCs...
January 2018: Oncology Letters
https://www.readbyqxmd.com/read/29394508/activation-of-pial-and-dural-macrophages-and-dendritic-cells-by-csd-67-chrs
#12
Aaron J Schain, Agustin Melo-Carrillo, David Borsook, Jaime Grutzendler, Andrew M Strassman, Rami Burstein
OBJECTIVE: Cortical spreading depression (CSD) has long been implicated in migraine attacks with aura. The process by which CSD, a cortical event that occurs within the blood brain barrier (BBB), results in nociceptor activation outside the BBB is likely mediated by multiple molecules and cells. The objective of this study was to determine whether CSD activates immune cells inside the BBB (pia), outside the BBB (dura), or in both, and if so, when. METHODS: Investigating cellular events in the meninges shortly after CSD, we used in-vivo 2-photon imaging to identify changes in macrophages and dendritic cells (DC) that reside in the pia, arachnoid, and dura, and their anatomical relationship to TRPV1 axons...
February 2, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29392411/investigating-the-roles-of-regulatory-t-cells-mast-cells-and-interleukin-9-in-the-control-of-skin-inflammation-by-vitamin-d
#13
Shelley Gorman, Sian Geldenhuys, Clare E Weeden, Michele A Grimbaldeston, Prue H Hart
Topical application of biologically active vitamin D [1,25-dihydroxyvitamin D (1,25(OH)2D)], or low-calcemic analogues, curb skin inflammation through mechanisms that involve migratory dendritic cells (DCs) and regulatory T (TReg) cells. 1,25(OH)2D also promotes immunoregulation by mast cells, and inhibits the development of T helper type-9 (Th9) cells that secrete interleukin-9 (IL-9). Here, we investigated the ability of topical 1,25(OH)2D to suppress contact dermatitis through an IL-9-dependent process, examining mast cells and IL-9-secreting T cells...
February 1, 2018: Archives of Dermatological Research
https://www.readbyqxmd.com/read/29374077/cd11b-dendritic-cell-mediated-anti-mycobacterium-tuberculosis-th1-activation-is-counterregulated-by-cd103-dendritic-cells-via-il-10
#14
Rocky Lai, Mangalakumari Jeyanathan, Sam Afkhami, Anna Zganiacz, Joanne A Hammill, Yushi Yao, Charu Kaushic, Zhou Xing
Mycobacterium tuberculosis, the pathogen causing pulmonary tuberculosis (TB) in humans, has evolved to delay Th1 immunity in the lung. Although conventional dendritic cells (cDCs) are known to be critical to the initiation of T cell immunity, the differential roles and molecular mechanisms of migratory CD11b+ and CD103+ cDC subsets in anti-M. tuberculosis Th1 activation remain unclear. Using a murine model of pulmonary M. tuberculosis infection, we found that slow arrival of M. tuberculosis-bearing migratory CD11b+ and CD103+ cDCs at the draining lymph nodes preceded the much-delayed Th1 immunity and protection in the lung...
January 26, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29342287/to-the-brain-and-back-migratory-paths-of-dendritic-cells-in-multiple-sclerosis
#15
Maxime De Laere, Zwi N Berneman, Nathalie Cools
Migration of dendritic cells (DC) to the central nervous system (CNS) is a critical event in the pathogenesis of multiple sclerosis (MS). While up until now, research has mainly focused on the transmigration of DC through the blood-brain barrier, experimental evidence points out that also the choroid plexus and meningeal vessels represent important gateways to the CNS, especially in early disease stages. On the other hand, DC can exit the CNS to maintain immunological tolerance to patterns expressed in the CNS, a process that is perturbed in MS...
January 12, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29327199/glycogen-synthase-kinase-3%C3%AE-regulates-equilibrium-between-neurogenesis-and-gliogenesis-in-rat-model-of-parkinson-s-disease-a-crosstalk-with-wnt-and-notch-signaling
#16
Sonu Singh, Akanksha Mishra, Sachi Bharti, Virendra Tiwari, Jitendra Singh, Parul, Shubha Shukla
Neurogenesis involves generation of functional newborn neurons from neural stem cells (NSCs). Insufficient formation or accelerated degeneration of newborn neurons may contribute to the severity of motor/nonmotor symptoms of Parkinson's disease (PD). However, the functional role of adult neurogenesis in PD is yet not explored and whether glycogen synthase kinase-3β (GSK-3β) affects multiple steps of adult neurogenesis in PD is still unknown. We investigated the possible underlying molecular mechanism of impaired adult neurogenesis associated with PD...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29229919/migratory-dendritic-cells-acquire-and-present-lymphatic-endothelial-cell-archived-antigens-during-lymph-node-contraction
#17
Ross M Kedl, Robin S Lindsay, Jeffrey M Finlon, Erin D Lucas, Rachel S Friedman, Beth A Jirón Tamburini
Antigens derived from viral infection or vaccination can persist within a host for many weeks after resolution of the infection or vaccine responses. We previously identified lymphatic endothelial cells (LEC) as the repository for this antigen archival, yet LECs are unable to present their archived antigens to CD8+ T cells, and instead transfer their antigens to CD11c+ antigen-presenting cells (APC). Here we show that the exchange of archived antigens between LECs and APCs is mediated by migratory dendritic cells (DC)...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29216332/voltage-dependent-calcium-channel-signaling-mediates-gabaa-receptor-induced-migratory-activation-of-dendritic-cells-infected-by-toxoplasma-gondii
#18
Sachie Kanatani, Jonas M Fuks, Einar B Olafsson, Linda Westermark, Benedict Chambers, Manuel Varas-Godoy, Per Uhlén, Antonio Barragan
The obligate intracellular parasite Toxoplasma gondii exploits cells of the immune system to disseminate. Upon T. gondii-infection, γ-aminobutyric acid (GABA)/GABAA receptor signaling triggers a hypermigratory phenotype in dendritic cells (DCs) by unknown signal transduction pathways. Here, we demonstrate that calcium (Ca2+) signaling in DCs is indispensable for T. gondii-induced DC hypermotility and transmigration in vitro. We report that activation of GABAA receptors by GABA induces transient Ca2+ entry in DCs...
December 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29196450/migratory-cd11b-conventional-dendritic-cells-induce-t-follicular-helper-cell-dependent-antibody-responses
#19
Jayendra Kumar Krishnaswamy, Uthaman Gowthaman, Biyan Zhang, Johan Mattsson, Louis Szeponik, Dong Liu, Renee Wu, Theresa White, Samuele Calabro, Lan Xu, Magalie A Collet, Marina Yurieva, Samuel Alsén, Per Fogelstrand, Anne Walter, William R Heath, Scott N Mueller, Ulf Yrlid, Adam Williams, Stephanie C Eisenbarth
T follicular helper (Tfh) cells are a subset of CD4+ T cells that promote antibody production during vaccination. Conventional dendritic cells (cDCs) efficiently prime Tfh cells; however, conclusions regarding which cDC instructs Tfh cell differentiation have differed between recent studies. We found that these discrepancies might exist because of the unusual sites used for immunization in murine models, which differentially bias which DC subsets access antigen. We used intranasal immunization as a physiologically relevant route of exposure that delivers antigen to all tissue DC subsets...
December 1, 2017: Science Immunology
https://www.readbyqxmd.com/read/29138056/skin-specific-cd301b-dermal-dendritic-cells-drive-il-17-mediated-psoriasis-like-immune-response-in-mice
#20
Tae-Gyun Kim, Sung Hee Kim, Jeyun Park, Wanho Choi, Moah Sohn, Hye Young Na, Minseok Lee, Jae Won Lee, Soo Min Kim, Do-Young Kim, Hyoung-Pyo Kim, Jae-Hoon Choi, Chae Gyu Park, Min-Geol Lee
Conventional dendritic cells (cDCs) are composed of heterogeneous subsets commonly arising from DC-committed progenitors. A population of CD301b-expressing DCs has recently been identified in non-lymphoid barrier tissues such as skin. However, whether CD301b(+) DCs in the skin represent ontogenetically unique subpopulation of migratory cDCs has not been fully addressed. Here, we demonstrated that CD301b(+) dermal DCs were distinct subpopulation of FLT3L-dependent CD11b(+) cDC2 lineage which required an additional GM-CSF cue for the adequate development...
November 11, 2017: Journal of Investigative Dermatology
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