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https://www.readbyqxmd.com/read/29670615/distinct-in-vitro-t-helper-17-differentiation-capacity-of-peripheral-naive-t-cells-in-rheumatoid-and-psoriatic-arthritis
#1
Eszter Baricza, Nikolett Marton, Panna Királyhidi, Orsolya Tünde Kovács, Ilona Kovácsné Székely, Eszter Lajkó, Lászó Kőhidai, Bernadett Rojkovich, Barbara Érsek, Edit Irén Buzás, György Nagy
Background: The T-helper 17 (Th17) cells have a prominent role in inflammation as well as in bone and join destruction in both rheumatoid and psoriatic arthritis (RA and PsA). Here, we studied Th17 cell differentiation in RA and PsA. Methods: Blood samples from healthy donors, RA and PsA patients were collected. CD45RO- (naive) and CD45RO+ (memory) T cells were isolated from peripherial blood mononuclear cell by magnetic separation. Naive T cells were stimulated with anti-CD3, anti-CD28, and goat anti-mouse IgG antibodies and treated with transforming grow factor beta, interleukin (IL)-6, IL-1β , and IL-23 cytokines and also with anti-IL-4 antibody...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29669853/cd32-is-expressed-on-cells-with-transcriptionally-active-hiv-but-does-not-enrich-for-hiv-dna-in-resting-t-cells
#2
Mohamed Abdel-Mohsen, Leticia Kuri-Cervantes, Judith Grau-Exposito, Adam M Spivak, Racheal A Nell, Costin Tomescu, Surya Kumari Vadrevu, Leila B Giron, Carla Serra-Peinado, Meritxell Genescà, Josep Castellví, Guoxin Wu, Perla M Del Rio Estrada, Mauricio González-Navarro, Kenneth Lynn, Colin T King, Sai Vemula, Kara Cox, Yanmin Wan, Qingsheng Li, Karam Mounzer, Jay Kostman, Ian Frank, Mirko Paiardini, Daria Hazuda, Gustavo Reyes-Terán, Douglas Richman, Bonnie Howell, Pablo Tebas, Javier Martinez-Picado, Vicente Planelles, Maria J Buzon, Michael R Betts, Luis J Montaner
The persistence of HIV reservoirs, including latently infected, resting CD4+ T cells, is the major obstacle to cure HIV infection. CD32a expression was recently reported to mark CD4+ T cells harboring a replication-competent HIV reservoir during antiretroviral therapy (ART) suppression. We aimed to determine whether CD32 expression marks HIV latently or transcriptionally active infected CD4+ T cells. Using peripheral blood and lymphoid tissue of ART-treated HIV+ or SIV+ subjects, we found that most of the circulating memory CD32+ CD4+ T cells expressed markers of activation, including CD69, HLA-DR, CD25, CD38, and Ki67, and bore a TH 2 phenotype as defined by CXCR3, CCR4, and CCR6...
April 18, 2018: Science Translational Medicine
https://www.readbyqxmd.com/read/29669595/imp1-regulates-uca1-mediated-cell-invasion-through-facilitating-uca1-decay-and-decreasing-the-sponge-effect-of-uca1-for-mir-122-5p
#3
Yanchun Zhou, Xiuhua Meng, Shaoying Chen, Wei Li, Delin Li, Robert Singer, Wei Gu
BACKGROUND: Long noncoding RNAs (LncRNAs) represent a class of widespread and diverse endogenous RNAs that can posttranscriptionally regulate gene expression through the interaction with RNA-binding proteins and micro RNAs (miRNAs). Here, we report that in breast carcinoma cells, the insulin-like growth factor 2 messenger RNA binding protein (IMP1) binds to lncRNA urethral carcinoma-associated 1 (UCA1) and suppresses the UCA1-induced invasive phenotype. METHODS: RT-qPCR and RNA sequence assays were used to investigate the expression of UCA1 and miRNAs in breast cancer cells in response to IMP1 expression...
April 18, 2018: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29659729/t-helper-17-1-cells-associate-with-multiple-sclerosis-disease-activity-perspectives-for-early-intervention
#4
Jamie van Langelaar, Roos M van der Vuurst de Vries, Malou Janssen, Annet F Wierenga-Wolf, Isis M Spilt, Theodora A Siepman, Wendy Dankers, Georges M G M Verjans, Helga E de Vries, Erik Lubberts, Rogier Q Hintzen, Marvin M van Luijn
Interleukin-17-expressing CD4+ T helper 17 (Th17) cells are considered as critical regulators of multiple sclerosis disease activity. However, depending on the species and pro-inflammatory milieu, Th17 cells are functionally heterogeneous, consisting of subpopulations that differentially produce interleukin-17, interferon-gamma and granulocyte macrophage colony-stimulating factor. In the current study, we studied distinct effector phenotypes of human Th17 cells and their correlation with disease activity in multiple sclerosis patients...
April 5, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29657255/genome-wide-sirna-screening-in-mouse-bone-marrow-derived-macrophages-revealed-that-knockdown-of-ribosomal-proteins-suppresses-il-10-and-enhances-tnf-%C3%AE-production
#5
Yoshihiko Okamura, Naoyuki Makita, Yoshiyuki Hizukuri, Yasuhiro Hayashi
Macrophages play a central role in the immune response, and their diverse functions are attributed to the spectrum of their functional states. To elucidate molecules involved in modulating the balance between the anti-inflammatory cytokine IL-10 and the pro-inflammatory cytokine TNF-α, we conducted genome-wide siRNA screening. First, we established an siRNA screening system using mouse bone marrow-derived macrophages, which are a suitable model for studying functional states of macrophages in vitro. In the primary screen and the subsequent reproducibility assay, 112 siRNA pools demonstrated enhancement of IL-10 production and 497 siRNA pools suppressed IL-10 production...
April 13, 2018: Journal of Clinical and Experimental Hematopathology: JCEH
https://www.readbyqxmd.com/read/29642363/re-a-ccr4-antagonist-reverses-the-tumor-promoting-microenvironment-of-renal-cancer
#6
Anthony Atala
No abstract text is available yet for this article.
April 2018: Journal of Urology
https://www.readbyqxmd.com/read/29626383/micrornp-mediated-translational-activation-of-nonadenylated-mrnas-in-a-mammalian-cell-free-system
#7
Motoaki Wakiyama, Koichi Ogami, Ryo Iwaoka, Kazuma Aoki, Shin-Ichi Hoshino
MicroRNAs are small noncoding RNAs that regulate translation and mRNA stability by binding target mRNAs in complex with Argonaute (AGO) proteins. AGO interacts with a member of the TNRC6 family proteins to form a microRNP complex, which recruits the CCR4-NOT complex to accelerate deadenylation and inhibits translation. MicroRNAs primarily repress translation of target mRNAs but have been shown to enhance translation of a specific type of target reporter mRNAs in various experimental systems: G0 quiescent mammalian cells, Xenopus laevis oocytes, Drosophila embryo extracts, and HeLa cells...
April 6, 2018: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/29622035/ccl17-blockade-as-a-therapy-for-osteoarthritis-pain-and-disease
#8
Ming-Chin Lee, Reem Saleh, Adrian Achuthan, Andrew J Fleetwood, Irmgard Förster, John A Hamilton, Andrew D Cook
BACKGROUND: Granulocyte macrophage-colony stimulating factor (GM-CSF) has been implicated in the pathogenesis of a number of inflammatory diseases and in osteoarthritis (OA). We identified previously a new GM-CSF→Jmjd3→interferon regulatory factor 4 (IRF4)→chemokine (c-c motif) ligand 17 (CCL17) pathway, which is important for the development of inflammatory arthritis pain and disease. Tumour necrosis factor (TNF) can also be linked with this pathway. Here we investigated the involvement of the pathway in OA pain and disease development using the GM-CSF-dependent collagenase-induced OA (CiOA) model...
April 5, 2018: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29615995/htlv-1-alters-t-cells-for-viral-persistence-and-transmission
#9
REVIEW
Azusa Tanaka, Masao Matsuoka
Human T-cell leukemia virus type 1 (HTLV-1) was the first retrovirus to be discovered as a causative agent of adult T-cell leukemia-lymphoma (ATL) and chronic inflammatory diseases. Two viral factors, Tax and HTLV-1 bZIP factor (HBZ), are thought to be involved in the leukemogenesis of ATL. Tax expression is frequently lost due to DNA methylation in the promoter region, genetic changes to the tax gene, and deletion of the 5' long terminal repeat (LTR) in approximately half of all ATL cases. On the other hand, HBZ is expressed in all ATL cases...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29602771/transcriptomic-analysis-of-cd4-t-cells-reveals-novel-immune-signatures-of-latent-tuberculosis
#10
Julie G Burel, Cecilia S Lindestam Arlehamn, Nabeela Khan, Grégory Seumois, Jason A Greenbaum, Randy Taplitz, Robert H Gilman, Mayuko Saito, Pandurangan Vijayanand, Alessandro Sette, Bjoern Peters
In the context of infectious diseases, cell population transcriptomics are useful to gain mechanistic insight into protective immune responses, which is not possible using traditional whole-blood approaches. In this study, we applied a cell population transcriptomics strategy to sorted memory CD4 T cells to define novel immune signatures of latent tuberculosis infection (LTBI) and gain insight into the phenotype of tuberculosis (TB)-specific CD4 T cells. We found a 74-gene signature that could discriminate between memory CD4 T cells from healthy latently Mycobacterium tuberculosis -infected subjects and noninfected controls...
March 30, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29598931/tarc-expression-in-the-circulation-and-cutaneous-granulomas-correlates-with-disease-severity-and-indicates-th2-mediated-progression-in-patients-with-sarcoidosis
#11
Chuyen Thi Hong Nguyen, Naotomo Kambe, Ikuko Ueda-Hayakawa, Izumi Kishimoto, Nhung Thi My Ly, Kana Mizuno, Hiroyuki Okamoto
BACKGROUND: Sarcoidosis is a systemic disorder characterized by the accumulation of lymphocytes and monocyte/macrophage lineage cells that results in the formation of non-caseating granulomas. Thymus- and activation-regulated chemokine (TARC)/CCL17 is an important chemokine in the amplification of Th2 responses, which are achieved by recruiting CCR4-expressing CD4+ T lymphocytes. TARC concentrations are known to increase in the serum of sarcoidosis patients; however, its role in the assessment of severity and prognosis of sarcoidosis remains unknown...
March 26, 2018: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/29582477/immune-molecular-profiling-of-whole-blood-drawn-from-a-non-human-primate-cardiac-xenograft-model-treated-with-anti-cd154-monoclonal-antibodies
#12
Sun A Ock, Keon Bong Oh, Seongsoo Hwang, Ik Jin Yun, Curie Ahn, Hyun Ken Chee, Hwajung Kim, Imran Ullah, Gi-Sun Im, Eung Woo Park
Most studies of xenografts have been carried out with complex immunosuppressive regimens to prevent immune rejection; however, such treatments may be fatal owing to unknown causes. Here, we performed immune molecular profiling following anti-CD154 monoclonal antibody (mAb) treatment in heterotopic abdominal cardiac xenografts from α-1,3-galactosyltransferase-knockout pigs into cynomolgus monkeys to elucidate the mechanisms mediating the undesirable fatal side effects of immunosuppressive agents. Blood samples were collected from healthy monkeys as control and then at 2 days after xenograft transplantation and just before humane euthanasia; 94 genes related to the immune system were analyzed...
March 26, 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29572070/escmid-study-group-for-infections-in-compromised-hosts-esgich-consensus-document-on-the-safety-of-targeted-and-biological-therapies-an-infectious-diseases-perspective-agents-targeting-lymphoid-or-myeloid-cells-surface-antigens-ii-cd22-cd30-cd33-cd38-cd40-slamf
#13
REVIEW
Lubos Drgona, Carlota Gudiol, Simone Lanini, Bernd Salzberger, Giuseppe Ippolito, Małgorzata Mikulska
BACKGROUND: The present review is part of the ESCMID Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biological therapies. AIMS: To review, from an Infectious Diseases perspective, the safety profile of agents targeting CD22, CD30, CD33, CD38, CD40, SLAMF-7 and CCR4 and to suggest preventive recommendations. SOURCES: Computer-based MEDLINE searches with MeSH terms pertaining to each agent or therapeutic family...
March 20, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29554310/4ehp-independent-repression-of-endogenous-mrnas-by-the-rna-binding-protein-gigyf2
#14
Cinthia C Amaya Ramirez, Petra Hubbe, Nicolas Mandel, Julien Béthune
Initially identified as a factor involved in tyrosine kinase receptor signaling, Grb10-interacting GYF protein 2 (GIGYF2) has later been shown to interact with the 5' cap-binding protein 4EHP as part of a translation repression complex, and to mediate post-transcriptional repression of tethered reporter mRNAs. A current model proposes that GIGYF2 is indirectly recruited to mRNAs by specific RNA-binding proteins (RBPs) leading to translation repression through its association with 4EHP. Accordingly, we recently observed that GIGYF2 also interacts with the miRNA-induced silencing complex and probably modulates its translation repression activity...
March 15, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29526923/-new-aspects-of-poly-a-tail-shortening-of-mrna-in-controlling-heart-functions
#15
Keiji Kuba
Cardiovascular diseases are major increasing causes of death in developed countries. Coordinated transcriptional and post-transcriptional regulation of gene expression is crucial to maintain normal heart physiology. Dysregulation of these processes causes and/or accompanies multiple pathologies, such as cardiomyopathy and myocardial infarction. The exonuclease-mediated shortening of the mRNA poly(A) tail, a process called deadenylation, is a key step in regulated mRNA degradation, and deadenylation is mostly executed by the CCR4-NOT complex...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
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
#16
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/29518422/egg-specific-ige-and-basophil-activation-but-not-egg-specific-t-cells-correlate-with-phenotypes-of-clinical-egg-allergy
#17
M Cecilia Berin, Alexander Grishin, Madhan Masilamani, Donald Y Leung, Scott H Sicherer, Stacie M Jones, A Wesley Burks, Alice K Henning, Peter Dawson, Joanna Grabowska, Charuta Agashe, Wendy F Davidson, Robert A Wood, Hugh A Sampson
BACKGROUND: Egg allergy is phenotypically heterogeneous. A subset of egg allergic individuals can tolerate egg in an extensively heated form. Inclusion of baked-egg (BE) into their diet accelerates resolution of egg allergy. Conversely, BE reactivity is associated with persistent disease. The immune basis of this clinical heterogeneity is unknown. OBJECTIVES: To study egg-specific antibody, basophil, and T cell responses in children with reactivity or tolerance to BE...
March 5, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29515406/successful-treatment-of-erythrodermic-mycosis-fungoides-with-mogamulizumab-followed-by-etoposide-monotherapy
#18
Taku Fujimura, Kayo Tanita, Yota Sato, Yumi Kambayashi, Sadanori Furudate, Akira Tsukada, Akira Hashimoto, Setsuya Aiba
Mogamulizumab induces cytotoxicity against CCR4+ lymphoma cells by antibody-dependent cell-mediated cytotoxicity in advanced cutaneous T-cell lymphoma patients. Since the efficacy of mogamulizumab in mycosis fungoides (28.6%) is lower than that in Sézary syndrome (47.1%), reagents that enhance the antitumor immune response induced by mogamulizumab are needed to further optimize its use for the treatment of erythrodermic mycosis fungoides. In this report, we present a case of erythrodermic mycosis fungoides successfully treated with mogamulizumab followed by etoposide monotherapy...
January 2018: Case Reports in Oncology
https://www.readbyqxmd.com/read/29510192/ccr4-is-critically-involved-in-skin-allergic-inflammation-of-balb-c-mice
#19
Kazuhiko Matsuo, Daisuke Nagakubo, Yuhei Komori, Shun Fujisato, Natsumi Takeda, Mizuki Kitamatsu, Keiji Nishiwaki, Ying-Shu Quan, Fumio Kamiyama, Naoki Oiso, Akira Kawada, Osamu Yoshie, Takashi Nakayama
Atopic dermatitis (AD) is a chronic inflammatory skin disease involving Th2 cells, eosinophils, and mast cells. Although CCR4 is a major chemokine receptor expressed on Th2 cells and regarded as a potential therapeutic target for allergic diseases, its role in AD still remains unclear. Here, by using a hydrogel patch as a transcutaneous delivery device for ovalbumin (an antigen) and Staphylococcus aureus δ-toxin (a mast cell activator), we efficiently induced acute AD-like skin lesions in BALB/c mice, a strain prone to Th2 responses, that were characterized by (1) increased numbers of eosinophils, mast cells, and CCR4-expressing Th2 cells in the skin lesions, (2) elevated levels of total and ovalbumin-specific IgE in the sera, and (3) increased expression of IL-4, IL-17A, IL-22, CCL17, CCL22, and CCR4 in the skin lesions...
March 3, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29507584/clinical-implications-of-cd4-t-cell-subsets-in-adult-atopic-asthma-patients
#20
Matthew Wiest, Katherine Upchurch, Wenjie Yin, Jerome Ellis, Yaming Xue, Bobby Lanier, Mark Millard, HyeMee Joo, SangKon Oh
Background: T cells play a central role in chronic inflammation in asthma. However, the roles of individual subsets of T cells in the pathology of asthma in patients remain to be better understood. Methods: We investigated the potential signatures of T cell subset phenotypes in asthma using fresh whole blood from adult atopic asthma patients (n = 43) and non-asthmatic control subjects (n = 22). We further assessed their potential clinical implications by correlating asthma severity...
2018: Allergy, Asthma, and Clinical Immunology
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