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dendrite RNA

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https://www.readbyqxmd.com/read/28223918/rpph1-upregulates-cdc42-expression-and-promotes-hippocampal-neuron-dendritic-spine-formation-by-competing-with-mir-330-5p
#1
Yifei Cai, Ziling Sun, Huizhen Jia, Hongxue Luo, Xiaoyang Ye, Qi Wu, Yi Xiong, Wei Zhang, Jun Wan
Alzheimer's disease (AD) is a heterogeneous neurodegenerative disease. Recent studies employing microRNA-seq and genome-wide sequencing have identified some non-coding RNAs that are influentially involved in AD pathogenesis. Non-coding RNAs can compete with other endogenous RNAs by microRNA response elements (MREs) and manipulate biological processes, such as tumorigenesis. However, only a few non-coding RNAs have been reported in the pathogenesis of AD. In this study, we constructed the first competing endogenous RNA (ceRNA) network leveraging whole transcriptome sequencing and a previously studied microRNA-seq of APPswe/PS1ΔE9 transgenic mice...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28223726/dendritic-cells-engineered-to-secrete-anti-dcr3-antibody-augment-cytotoxic-t-lymphocyte-response-against-pancreatic-cancer-in-vitro
#2
Jiang Chen, Xiao-Zhong Guo, Hong-Yu Li, Jia-Jun Zhao, Wen-Da Xu
AIM: To investigate the enhanced cytotoxic T lymphocyte responses against pancreatic cancer (PC) in vitro induced by dendritic cells (DCs) engineered to secrete anti-DcR3 monoclonal antibody (mAb). METHODS: DCs, T lymphocytes and primary PC cells were obtained from PC patients. DCs were transfected with a designed humanized anti-DcR3 monoclonal antibody heavy and light chain mRNA and/or total tumor RNA (DC-tumor-anti-DcR3 RNA or DC-total tumor RNA) by using electroporation technology...
February 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28219022/rationale-for-stimulator-of-interferon-genes-targeted-cancer-immunotherapy
#3
REVIEW
Thaiz Rivera Vargas, Isis Benoit-Lizon, Lionel Apetoh
The efficacy of checkpoint inhibitor therapy illustrates that cancer immunotherapy, which aims to foster the host immune response against cancer to achieve durable anticancer responses, can be successfully implemented in a routine clinical practice. However, a substantial proportion of patients does not benefit from this treatment, underscoring the need to identify alternative strategies to defeat cancer. Despite the demonstration in the 1990's that the detection of danger signals, including the nucleic acids DNA and RNA, by dendritic cells (DCs) in a cancer setting is essential for eliciting host defence, the molecular sensors responsible for recognising these danger signals and eliciting anticancer immune responses remain incompletely characterised, possibly explaining the disappointing results obtained so far upon the clinical implementation of DC-based cancer vaccines...
February 17, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28215654/dendritic-cell-vaccination-in-combination-with-docetaxel-for-patients-with-metastatic-castration-resistant-prostate-cancer-a-randomized-phase-ii-study
#4
Per Kongsted, Troels Holz Borch, Eva Ellebaek, Trine Zeeberg Iversen, Rikke Andersen, Özcan Met, Morten Hansen, Henriette Lindberg, Lisa Sengeløv, Inge Marie Svane
BACKGROUND AIMS: We investigated whether the addition of an autologous dendritic cell-based cancer vaccine (DCvac) induces an immune response in patients with metastatic castration-resistant prostate cancer treated with docetaxel. METHODS: Forty-three patients were randomized 1:1 to receive up to 10 cycles of docetaxel alone, 75 mg/m(2) every 3 weeks or in combination with DCvac. Monocytes were harvested following a leukapheresis procedure, matured ex vivo and subsequently transfected with messenger RNA encoding multiple tumor-associated antigens (TAAs)...
February 15, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28215653/dendritic-cells-infected-by-ad-sh-socs1-enhance-cytokine-induced-killer-cik-cell-immunotherapeutic-efficacy-in-cervical-cancer-models
#5
Yi Zheng, Bicheng Hu, Shenggao Xie, Xiaofan Chen, Yuqian Hu, Wanping Chen, Shanshan Li, Bo Hu
BACKGROUND AIMS: Cervical cancer constitutes a major problem in women's health worldwide, but the efficacy of the standard therapy is unsatisfactory. Cytokine-induced killer (CIK) cells exhibit antitumor activity against a variety of malignancies in preclinical models and have proven safe and effective in clinical trials. However, current CIK therapy has limitations and needs to be improved to meet the clinical requirements. The aim of this study was to investigate whether suppressing the expression of cytokine signaling 1 (SOCS1) in dendritic cells (DCs) can shorten in vitro CIK culture time and improve its antitumor efficacy...
February 15, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28205605/the-role-of-the-rna-demethylase-fto-fat-mass-and-obesity-associated-and-mrna-methylation-in-hippocampal-memory-formation
#6
Brandon J Walters, Valentina Mercaldo, Colleen J Gillon, Matthew Yip, Rachael L Neve, Frederick M Boyce, Paul W Frankland, Sheena A Josselyn
The formation of long-lasting memories requires coordinated changes in gene expression and protein synthesis (Davis and Squire, 1984; Duvarci et al, 2008; Hernandez and Abel, 2008). Although many studies implicate DNA modifications (DNA methylation, histone modifications) in memory formation, the contributions of RNA modifications remain largely unexplored. Here, we investigated the role of mRNA methylation in hippocampal-dependent memory formation in mice. RNA modifications are highly dynamic and readily reversible (Jia et al, 2013)...
February 16, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28199142/dc-stamp-is-an-osteoclast-fusogen-engaged-in-periodontal-bone-resorption
#7
W Wisitrasameewong, M Kajiya, A Movila, S Rittling, T Ishii, M Suzuki, S Matsuda, Y Mazda, M R Torruella, M M Azuma, K Egashira, M O Freire, H Sasaki, C Y Wang, X Han, M A Taubman, T Kawai
Dendritic cell-specific transmembrane protein (DC-STAMP) plays a key role in the induction of osteoclast (OC) cell fusion, as well as DC-mediated immune regulation. While DC-STAMP gene expression is upregulated in the gingival tissue with periodontitis, its pathophysiological roles in periodontitis remain unclear. To evaluate the effects of DC-STAMP in periodontitis, anti-DC-STAMP-monoclonal antibody (mAb) was tested in a mouse model of ligature-induced periodontitis ( n = 6-7/group) where Pasteurella pneumotropica ( Pp)-reactive immune response activated T cells to produce receptor activator of nuclear factor kappa-B ligand (RANKL), which, in turn, promotes the periodontal bone loss via upregulation of osteoclastogenesis...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28197373/systemic-activation-of-antigen-presenting-cells-via-rna-loaded-nanoparticles
#8
Elias J Sayour, Gabriel De Leon, Christina Pham, Adam Grippin, Hanna Kemeny, Joshua Chua, Jianping Huang, John H Sampson, Luis Sanchez-Perez, Catherine Flores, Duane A Mitchell
While RNA-pulsed dendritic cell (DC) vaccines have shown promise, the advancement of cellular therapeutics is fraught with developmental challenges. To circumvent the challenges of cellular immunotherapeutics, we developed clinically translatable nanoliposomes that can be combined with tumor-derived RNA to generate personalized tumor RNA-nanoparticles (NPs) with considerable scale-up capacity. RNA-NPs bypass MHC restriction, are amenable to central distribution, and can provide near immediate immune induction...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28190836/specificity-of-microrna-detection-on-a-power-free-microfluidic-chip-with-laminar-flow-assisted-dendritic-amplification
#9
Kazuki Hasegawa, Rina Negishi, Mutsuyoshi Matsumoto, Masafumi Yohda, Kazuo Hosokawa, Mizuo Maeda
MicroRNAs (miRNAs) are attracting considerable attention as potential biomarkers for the early diagnosis of cancer. We have been developing a detection method for miRNAs on a microfluidic chip with external-power-free fluid pumping and enzyme-free amplification. The assay is completed within 20 min. Here, we describe the specificity of this miRNA detection method. First, the specificity against mismatched sequences was investigated. The nonspecific detection of a 2-nucleotide mismatched sequence was negligible, while that of a 1-nucleotide mismatched sequence was observed to a reasonable extent...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28186996/harnessing-rna-sequencing-for-global-unbiased-evaluation-of-two-new-adjuvants-for-dendritic-cell-immunotherapy
#10
Till S M Mathan, Johannes Textor, Annette E Sköld, Inge Reinieren-Beeren, Tom van Oorschot, Mareke Brüning, Carl G Figdor, Sonja I Buschow, Ghaith Bakdash, I Jolanda M de Vries
Effective stimulation of immune cells is crucial for the success of cancer immunotherapies. Current approaches to evaluate the efficiency of stimuli are mainly defined by known flow cytometry-based cell activation or cell maturation markers. This method however does not give a complete overview of the achieved activation state and may leave important side effects unnoticed. Here, we used an unbiased RNA sequencing (RNA-seq)-based approach to compare the capacity of four clinical-grade dendritic cell (DC) activation stimuli used to prepare DC-vaccines composed of various types of DC subsets; the already clinically applied GM-CSF and Frühsommer meningoencephalitis (FSME) prophylactic vaccine and the novel clinical grade adjuvants protamine-RNA complexes (pRNA) and CpG-P...
February 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28185352/lnc-dc-mediates-the-over-maturation-of-decidual-dendritic-cells-and-induces-the-increase-in-th1-cells-in-preeclampsia
#11
Wen Zhang, Yang Zhou, YiLing Ding
PROBLEM: Preeclampsia is a severe pregnancy-related disease that involves an imbalance of the immune reaction, which is dominated by T helper1 (Th1) cells; however, the mechanism is unclear. METHOD OF STUDY: We used flow cytometry, RT-PCR and western blotting to detect Th1 cells in the blood and mature dendritic cells, lnc-DC (a long non-coding RNA that is specifically expressed in DCs and can mediate dendritic cell maturation by phosphorylating STAT3) and p-STAT3 (phosphorylated transducer and activator of transcription 3) in the deciduas of normal pregnancies and preeclampsia patients...
February 10, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28181493/natural-amines-inhibit-activation-of-human-plasmacytoid-dendritic-cells-through-cxcr4-engagement
#12
Nikaïa Smith, Nicolas Pietrancosta, Sophia Davidson, Jacques Dutrieux, Lise Chauveau, Pasquale Cutolo, Michel Dy, Daniel Scott-Algara, Bénédicte Manoury, Onofrio Zirafi, Isabelle McCort-Tranchepain, Thierry Durroux, Françoise Bachelerie, Olivier Schwartz, Jan Münch, Andreas Wack, Sébastien Nisole, Jean-Philippe Herbeuval
Plasmacytoid dendritic cells (pDC) are specialized in secretion of type I interferon in response to pathogens. Here we show that natural monoamines and synthetic amines inhibit pDC activation by RNA viruses. Furthermore, a synthetic analogue of histamine reduces type I interferon production in a mouse model of influenza infection. We identify CXC chemokine receptor 4 (CXCR4) as a receptor used by amines to inhibit pDC. Our study establishes a functional link between natural amines and the innate immune system and identifies CXCR4 as a potential 'on-off' switch of pDC activity with therapeutic potential...
February 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28179879/cannabinoid-receptors-modulate-neuronal-morphology-and-ankyring-density-at-the-axon-initial-segment
#13
Mónica Tapia, Ana Dominguez, Wei Zhang, Ana Del Puerto, María Ciorraga, María José Benitez, Carmen Guaza, Juan José Garrido
Neuronal polarization underlies the ability of neurons to integrate and transmit information. This process begins early in development with axon outgrowth, followed by dendritic growth and subsequent maturation. In between these two steps, the axon initial segment (AIS), a subcellular domain crucial for generating action potentials (APs) and maintaining the morphological and functional polarization, starts to develop. However, the cellular/molecular mechanisms and receptors involved in AIS initial development and maturation are mostly unknown...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28179531/toll-like-receptor-7-agonist-gs-9620-induces-hiv-expression-and-hiv-specific-immunity-in-cells-from-hiv-infected-individuals-on-suppressive-antiretroviral-therapy
#14
Angela Tsai, Alivelu Irrinki, Jasmine Kaur, Tomas Cihlar, George Kukolj, Derek D Sloan, Jeffrey P Murry
Antiretroviral therapy can suppress HIV replication to undetectable levels but does not eliminate latent HIV, thus necessitating lifelong therapy. Recent efforts to target this persistent reservoir have focused on inducing the expression of latent HIV so that infected cells may be recognized and eliminated by the immune system. Toll like receptor (TLR) activation stimulates antiviral immunity and has been shown to induce HIV from latently infected cells. Activation of TLR7 leads to the production of several stimulatory cytokines, including type I interferons (IFNs)...
February 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28167945/tlr7-and-tlr3-sense-brucella-abortus-rna-to-induce-proinflammatory-cytokine-production-but-they-are-dispensable-for-host-control-of-infection
#15
Priscila C Campos, Marco Túlio R Gomes, Erika S Guimarães, Gabriela Guimarães, Sergio C Oliveira
Brucella abortus is a Gram-negative, facultative intracellular bacterium that causes brucellosis, a worldwide zoonotic disease leading to undulant fever in humans and abortion in cattle. The immune response against this bacterium relies on the recognition of microbial pathogen-associated molecular patterns, such as lipoproteins, lipopolysaccharides, and DNA; however, the immunostimulatory potential of B. abortus RNA remains to be elucidated. Here, we show that dendritic cells (DCs) produce significant amounts of IL-12, IL-6, and IP-10/CXCL10, when stimulated with purified B...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28157292/structurally-programmed-assembly-of-translation-initiation-nanoplex-for-superior-mrna-delivery
#16
Jiahe Li, Wade Wang, Yanpu He, Yingzhong Li, Emily Z Yan, Ketian Zhang, Darrell J Irvine, Paula T Hammond
Messenger RNA (mRNA) represents a promising class of nucleic-acid-based therapeutics. While numerous nanocarriers have been developed for mRNA delivery, the inherent labile nature of mRNA results in a very low transfection efficiency and poor expression of desired protein. Here we preassemble the mRNA translation initiation structure through an inherent molecular recognition between 7-methylguanosine (m(7)G)-capped mRNA and eukaryotic initiation factor 4E (eIF4E) protein to form ribonucleoproteins (RNPs), thereby mimicking the first step of protein synthesis inside cells...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28155712/genome-wide-map-of-rna-degradation-kinetics-patterns-in-dendritic-cells-after-lps-stimulation-facilitates-identification-of-primary-sequence-and-secondary-structure-motifs-in-mrnas
#17
Yutaro Kumagai, Alexis Vandenbon, Shunsuke Teraguchi, Shizuo Akira, Yutaka Suzuki
BACKGROUND: Immune cells have to change their gene expression patterns dynamically in response to external stimuli such as lipopolysaccharide (LPS). The gene expression is regulated at multiple steps in eukaryotic cells, in which control of RNA levels at both the transcriptional level and the post-transcriptional level plays important role. Impairment of the control leads to aberrant immune responses such as excessive or impaired production of cytokines. However, genome-wide studies focusing on the post-transcriptional control were relatively rare until recently...
December 22, 2016: BMC Genomics
https://www.readbyqxmd.com/read/28152048/zika-virus-antagonizes-type-i-interferon-responses-during-infection-of-human-dendritic-cells
#18
James R Bowen, Kendra M Quicke, Mohan S Maddur, Justin T O'Neal, Circe E McDonald, Nadia B Fedorova, Vinita Puri, Reed S Shabman, Bali Pulendran, Mehul S Suthar
Zika virus (ZIKV) is an emerging mosquito-borne flavivirus that is causally linked to severe neonatal birth defects, including microcephaly, and is associated with Guillain-Barre syndrome in adults. Dendritic cells (DCs) are an important cell type during infection by multiple mosquito-borne flaviviruses, including dengue virus, West Nile virus, Japanese encephalitis virus, and yellow fever virus. Despite this, the interplay between ZIKV and DCs remains poorly defined. Here, we found human DCs supported productive infection by a contemporary Puerto Rican isolate with considerable variability in viral replication, but not viral binding, between DCs from different donors...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28148553/perk-activation-mitigates-tau-pathology-in%C3%A2-vitro-and-in%C3%A2-vivo
#19
Julius Bruch, Hong Xu, Thomas W Rösler, Anderson De Andrade, Peer-Hendrik Kuhn, Stefan F Lichtenthaler, Thomas Arzberger, Konstanze F Winklhofer, Ulrich Müller, Günter U Höglinger
The RNA-like endoplasmic reticulum kinase (PERK) is genetically associated with the tauopathy progressive supranuclear palsy (PSP). To elucidate the functional mechanisms underlying this association, we explored PERK activity in brains of PSP patients and its function in three tauopathy models (cultured human neurons overexpressing 4-repeat wild-type tau or treated with the environmental neurotoxin annonacin, and P301S tau transgenic mice). In vitro, treatment with a pharmacological PERK activator CCT020312 or PERK overexpression reduced tau phosphorylation, tau conformational change and 4-repeat tau isoforms, and increased cell viability...
February 1, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28132840/a-rapid-induction-mechanism-for-lin28a-in-trophic-responses
#20
Alexandra M Amen, Claudia R Ruiz-Garzon, Jay Shi, Megha Subramanian, Daniel L Pham, Mollie K Meffert
Environmental cues provoke rapid transitions in gene expression to support growth and cellular plasticity through incompletely understood mechanisms. Lin28 RNA-binding proteins have evolutionarily conserved roles in post-transcriptional coordination of pro-growth gene expression, but signaling pathways allowing trophic stimuli to induce Lin28 have remained uncharacterized. We find that Lin28a protein exhibits rapid basal turnover in neurons and that mitogen-activated protein kinase (MAPK)-dependent phosphorylation of the RNA-silencing factor HIV TAR-RNA-binding protein (TRBP) promotes binding and stabilization of Lin28a, but not Lin28b, with an accompanying reduction in Lin28-regulated miRNAs, downstream of brain-derived neurotrophic factor (BDNF)...
February 2, 2017: Molecular Cell
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