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Myeloid regulatory cells

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https://www.readbyqxmd.com/read/28522585/herpes-simplex-virus-glycoprotein-d-targets-a-specific-dendritic-cell-subset-and-improves-the-performance-of-vaccines-to-human-papillomavirus-associated-tumors
#1
Bruna F M M Porchia, Ana Carolina R Moreno, Rodrigo N Ramos, Mariana O Diniz, Laís Helena T M de Andrade, Daniela S Rosa, José Alexandre M Barbuto, Silvia B Boscardin, Luís Carlos S Ferreira
Cervical cancer is a major public health problem and one of the leading causes of cancer deaths in women. Virtually all cases of cervical cancer, as well as a growing share of anal and head/neck tumors, are associated with human papillomavirus (HPV) infection. Despite the effectiveness, the available prophylactic vaccines do not benefit women with cervical lesions or cancer. Therefore, the search of new immunotherapeutic approaches to treat HPV-induced tumors is still a priority. The present study characterizes a therapeutic antitumor vaccine based on the genetic fusion of the Herpes simplex virus-1 (HSV-1) glycoprotein D (gD) with the E7 oncoprotein from HPV-16 (gDE7)...
May 18, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28520992/interplay-between-mir-574-3p-and-hnrnp-l-regulates-vegfa-mrna-translation-and-tumorigenesis
#2
Peng Yao, Jiangbin Wu, Daniel Lindner, Paul L Fox
MicroRNAs (miRNAs) and heterogeneous nuclear ribonucleoproteins (hnRNPs) are families of sequence-specific, posttranscriptional modulators of gene expression. Despite extensive mechanistic and functional studies on both regulatory classes, the interactions and crosstalk between them are largely unexplored. We have reported that competition between miR-297 and hnRNP L to bind a 3΄UTR-localized CA-rich element (CARE) of VEGFA mRNA regulates its translation. Here, we show that translation of VEGFA mRNA in human myeloid cells is dictated by a bi-directional interaction between miR-574-3p, a CA-rich microRNA, and hnRNP L...
May 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28513551/the-regulatory-capacity-of-bivalent-genes-a-theoretical-approach
#3
Torsten Thalheim, Maria Herberg, Markus Loeffler, Joerg Galle
Bivalent genes are frequently associated with developmental and lineage specification processes. Resolving their bivalency enables fast changes in their expression, which potentially can trigger cell fate decisions. Here, we provide a theoretical model of bivalency that allows for predictions on the occurrence, stability and regulatory capacity of this prominent modification state. We suggest that bivalency enables balanced gene expression heterogeneity that constitutes a prerequisite of robust lineage priming in somatic stem cells...
May 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28512255/immune-consequences-of-penfluridol-treatment-associated-with-inhibition-of-glioblastoma-tumor-growth
#4
Alok Ranjan, Stephen Wright, Sanjay K Srivastava
Glioblastoma is the most common and lethal brain tumor associated with only 12% median survival rate of patients. Despite the development of advanced surgical, radiation or use of combinations of anti-cancer drugs, treatment for glioblastoma patients is still a challenge. The major contributing factor in glioblastoma progression and resistive nature is its ability to evade the immune surveillance. Hence, modulating the immune system in glioblastoma tumors could be an important strategy for anticancer therapeutics...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28511090/inactivation-of-the-ksrp-gene-modifies-collagen-antibody-induced-arthritis
#5
Rudolf Käfer, Katharina Schrick, Lisa Schmidtke, Evelyn Montermann, Dominika Hobernik, Matthias Bros, Ching-Yi Chen, Hartmut Kleinert, Andrea Pautz
The KH type splicing regulatory protein (KSRP) is a nucleic acid binding protein, which negatively regulates the stability and/or translatability of many mRNA species encoding immune-relevant proteins. As KSRP is expressed in immune cells including T and B cells, neutrophils, macrophages and dendritic cells, we wanted to analyze its importance for the development of autoimmune diseases. We chose collagen antibody-induced arthritis (CAIA) as an appropriate autoimmune disease mouse model in which neutrophils and macrophages constitute the main effector cell populations...
May 13, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28507037/systemic-activation-of-nrf2-alleviates-lethal-autoimmune-inflammation-in-scurfy-mice
#6
Takuma Suzuki, Shohei Murakami, Shyam S Biswal, Shimon Sakaguchi, Hideo Harigae, Masayuki Yamamoto, Hozumi Motohashi
The transcription factor NRF2 (nuclear factor (erythroid-derived 2)-like 2) plays crucial roles in the defense mechanisms against oxidative stress and mediates anti-inflammatory actions in various pathological conditions. Recent studies have shown that the dysfunction of regulatory T cells (Tregs) is directly linked to the initiation and progression of various autoimmune diseases. To determine the Treg-independent impact of NRF2 activation on autoimmune inflammation, we examined Scurfy (Sf) mice that are deficient in Tregs and succumb to severe multi-organ inflammation by 4 weeks of age...
May 15, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28503991/platelet-concentrates-modulate-myeloid-dendritic-cell-immune-responses
#7
Katrina K Ki, Helen M Faddy, Robert L Flower, Melinda M Dean
Platelet transfusion has been reported to modulate the recipients' immune system. To date, the precise mechanism(s) driving poor patient outcomes (e.g., increased rate of mortality, morbidity, infectious complications and prolonged hospital stays) following platelet transfusion are largely undefined. To determine the potential for platelet concentrates (PC) to modulate responses of crucial immune regulatory cells, a human in vitro whole blood model of transfusion was established. Maturation and activation of human myeloid dendritic cells (mDC) and the specialized subset blood DC antigen (BDCA)3(+) DC were assessed following exposure to buffy-coat derived PC at day (D)2 (fresh) and D5 (date-of-expiry)...
May 15, 2017: Platelets
https://www.readbyqxmd.com/read/28501940/common-extracellular-matrix-regulation-of-myeloid-cell-activity-in-the-bone-marrow-and-tumor-microenvironments
#8
REVIEW
Sabina Sangaletti, Claudia Chiodoni, Claudio Tripodo, Mario P Colombo
The complex interaction between cells undergoing transformation and the various stromal and immunological cell components of the tumor microenvironment (TME) crucially influences cancer progression and diversification, as well as endowing clinical and prognostic significance. The immunosuppression characterizing the TME depends on the recruitment and activation of different cell types including regulatory T cells, myeloid-derived suppressor cells, and tumor-associated macrophages. Less considered is the non-cellular component of the TME...
May 13, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28492521/coinjection-of-il2-dna-enhances-e7-specific-antitumor-immunity-elicited-by-intravaginal-therapeutic-hpv-dna-vaccination-with-electroporation
#9
Y Sun, S Peng, A Yang, E Farmer, T-C Wu, Chien-Fu Hung
The generation and use of therapeutic human papillomavirus (HPV) DNA vaccines represent an appealing treatment method against HPV-associated cervical cancer due to their safety and durability. Previously, we created a therapeutic HPV DNA vaccine candidate by linking the HPV16-E7 DNA sequence to calreticulin (CRT/E7), which we showed could generate significant E7-specific cytotoxic T lymphocyte (CTL)-mediated anti-tumor immune responses against HPV16 oncogenes expressing murine tumor model TC-1. Here we assess the therapeutic efficacy of intravaginal immunization with pcDNA3-CRT/E7 followed by electroporation...
May 11, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28489607/trans-scirpusin-a-showed-antitumor-effects-via-autophagy-activation-and-apoptosis-induction-of-colorectal-cancer-cells
#10
Eun-Hye Hong, Eun-Young Heo, Jae-Hyoung Song, Bo-Eun Kwon, Jae-Young Lee, Yaejeong Park, Jinwoong Kim, Sun-Young Chang, Young-Won Chin, Sang-Min Jeon, Hyun-Jeong Ko
Trans-Scirpusin A (TSA) is a resveratrol oligomer found in Borassus flabellifer L. We found that TSA inhibited the growth of colorectal cancer Her2/CT26 cells in vivo in mice. Although some cytotoxic T lymphocytes (CTLs) were induced against the tumor-associated antigen Her2, TSA treatment did not significantly increase the level of Her2-specific CTL response compared to that with vehicle treatment. However, there was a significant increase in the level of TNF-α mRNA in tumor tissue and Her2-specific Ab (antibody) production...
April 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28484463/immune-effector-recovery-in-chronic-myeloid-leukemia-and-treatment-free-remission
#11
REVIEW
Amy Hughes, Agnes S M Yong
Chronic myeloid leukemia (CML) is a hematological cancer, characterized by a reciprocal chromosomal translocation between chromosomes 9 and 22 [t(9;22)], producing the Bcr-Abl oncogene. Tyrosine kinase inhibitors (TKIs) represent the standard of care for CML patients and exert a dual mode of action: direct oncokinase inhibition and restoration of effector-mediated immune surveillance, which is rendered dysfunctional in CML patients at diagnosis, prior to TKI therapy. TKIs such as imatinib, and more potent second-generation nilotinib and dasatinib induce a high rate of deep molecular response (DMR, BCR-ABL1 ≤ 0...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28470464/expanding-diversity-and-common-goal-of-regulatory-t-and-b-cells-ii-in-allergy-malignancy-and-transplantation
#12
REVIEW
Grażyna Korczak-Kowalska, Anna Stelmaszczyk-Emmel, Katarzyna Bocian, Ewelina Kiernozek, Nadzieja Drela, Joanna Domagała-Kulawik
Regulation of immune response was found to play an important role in the course of many diseases such as autoimmune diseases, allergy, malignancy, organ transplantation. The studies on immune regulation focus on the role of regulatory cells (Tregs, Bregs, regulatory myeloid cells) in these disorders. The number and function of Tregs may serve as a marker of disease activity. As in allergy, the depletion of Tregs is observed and the results of allergen-specific immunotherapy could be measured by an increase in the population of IL-10(+) regulatory cells...
May 3, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28466815/the-study-of-cd14-hla-dr-low-myeloid-drived-suppressor-cell-mdsc-in-peripheral-blood-of-peripheral-t-cell-lymphoma-patients-and-its-biological-function
#13
J Du, X Sun, Y Song
Peripheral T-cell lymphoma is the generic term of a group of heterogeneous disease in non-Hodgkin's lymphoma. To investigate the quantity of CD14+HLA-DR-/low MDSC and T cell subsets in peripheral blood of peripheral T cell lymphoma (PTCL) patients, and explore the biological functions of CD14+HLA-DR-/low MDSC in peripheral T-cell lymphoma. Flow cytometry was used to determine CD14+HLA-DR-/low MDSC and T cell subsets in peripheral blood of 33 peripheral T-cell lymphoma patients and 23 healthy cases; CD3 +T cells, CD14+HLA-DR-/low MDSC cells and HLA-DR+ cells were selected with magnetic activated cell sorting; Biotin-labeled micro magnetic beads (CD2 / CD3 / CD28) were used to stimulate amplification of CD3 + T cells, which were co-cultured and analyzed by flow cytometry for the effect of different concentrations of CD14+HLA-DR-/low MDSC on the proliferative activity of autologous CD3+ T cells...
March 31, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28464218/granulocytic-myeloid-derived-suppressor-cells-from-human-cord-blood-modulate-t-helper-cell-response-towards-an-anti-inflammatory-phenotype
#14
Natascha Köstlin, Margit Vogelmann, Bärbel Spring, Julian Schwarz, Judith Feucht, Christoph Härtel, Thorsten W Orlikowsky, Christian F Poets, Christian Gille
Infections are a leading cause of perinatal morbidity and mortality. The outstandingly high susceptibility to infections early in life is mainly attributable to the compromised state of the neonatal immune system. One important difference to the adult immune system is a bias towards T helper (Th) 2-responses in newborns. However, mechanisms regulating neonatal T-cell responses are yet incompletely understood. Granulocytic myeloid-derived suppressor cells (GR-MDSC) are myeloid cells with a granulocytic phenotype that suppress various functions of other immune cells and accumulate under physiological conditions during pregnancy in maternal and foetal blood...
May 2, 2017: Immunology
https://www.readbyqxmd.com/read/28461508/conditional-knockin-of-dnmt3a-r878h-initiates-acute-myeloid-leukemia-with-mtor-pathway-involvement
#15
Yu-Jun Dai, Yue-Ying Wang, Jin-Yan Huang, Li Xia, Xiao-Dong Shi, Jie Xu, Jing Lu, Xian-Bin Su, Ying Yang, Wei-Na Zhang, Pan-Pan Wang, Song-Fang Wu, Ting Huang, Jian-Qing Mi, Ze-Guang Han, Zhu Chen, Sai-Juan Chen
DNMT3A is frequently mutated in acute myeloid leukemia (AML). To explore the features of human AML with the hotspot DNMT3A R882H mutation, we generated Dnmt3a R878H conditional knockin mice, which developed AML with enlarged Lin(-)Sca1(+)cKit(+) cell compartments. The transcriptome and DNA methylation profiling of bulk leukemic cells and the single-cell RNA sequencing of leukemic stem/progenitor cells revealed significant changes in gene expression and epigenetic regulatory patterns that cause differentiation arrest and growth advantage...
May 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28460478/combination-therapy-with-dendritic-cells-and-lenalidomide-is-an-effective-approach-to-enhance-antitumor-immunity-in-a-mouse-colon-cancer-model
#16
Manh-Cuong Vo, Thanh-Nhan Nguyen-Pham, Hyun-Ju Lee, Thangaraj Jaya Lakshmi, Seoyun Yang, Sung-Hoon Jung, Hyeoung-Joon Kim, Je-Jung Lee
In this study, we investigated efficacy of lenalidomide in combination with tumor antigen-loaded dendritic cells (DCs) in murine colon cancer model. MC-38 cell lines were injected subcutaneously to establish colon cancer-bearing mice. After tumor growth, lenalidomide (50 mg/kg/day) was injected intraperitoneally on 3 consecutive days in combination with tumor antigen-loaded DC vaccination on days 8, 12, 16, and 20. The tumor antigen-loaded DCs plus lenalidomide combination treatment exhibited a significant inhibition of tumor growth compared with the other groups...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28455434/oil-soluble-contrast-medium-oscm-for-hysterosalpingography-modulates-dendritic-cell-and-regulatory-t-cell-profiles-in-the-peritoneal-cavity-a-possible-mechanism-by-which-oscm-enhances-fertility
#17
Gentaro Izumi, Kaori Koga, Masashi Takamura, Wang Bo, Miwako Nagai, Mariko Miyashita, Miyuki Harada, Tetsuya Hirata, Yasushi Hirota, Osamu Yoshino, Tomoyuki Fujii, Yutaka Osuga
Hysterosalpingography (HSG) with oil-soluble contrast medium (OSCM) is known to enhance fertility, although the mechanism is unclear. OSCM remains in the peritoneal cavity for several months after HSG. We hypothesized that OSCM that remains in the peritoneal cavity modulates dendritic cell (DC) and regulatory T cell (Treg) profiles and contributes to enhanced fertility. We characterized the profiles of DCs and Tregs in the peritoneal fluid from women who had undergone HSG. In vitro and in vivo effects of OSCM on monocyte-derived DCs and mouse peritoneal T cells were also evaluated...
April 28, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28454398/immunological-effects-of-vaccines-combined-with-granulocyte-colony-stimulating-factor-on-a-murine-wehi-3-leukemia-model
#18
Jinqiu Chen, Miling Zhang, Fuling Zhou, Jin Wang, Ben Niu, Wanggang Zhang
Granulocyte colony-stimulating factor (G-CSF) mobilizes regulatory T cells (Tregs) from bone marrow into the peripheral blood, by reducing the expression of stromal cell-derived factor-1α (SDF-1α). However, G-CSF has rarely been studied in acute myeloid leukemia (AML) immunotherapy. The present study performed a Transwell migration assay in vitro to determine the contribution of SDF-1α to the migration of leukemia cells, and the effects of G-CSF were evaluated. The effects of G-CSF on SDF-1α and Tregs in the AML microenvironment were examined, by employing a WEHI-3-grafted BALB/c mouse AML model (AML-M4)...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28450700/sensitization-of-glioblastoma-tumor-micro-environment-to-chemo-and-immunotherapy-by-galectin-1-intranasal-knock-down-strategy
#19
Matthias Van Woensel, Thomas Mathivet, Nathalie Wauthoz, Rémi Rosière, Abhishek D Garg, Patrizia Agostinis, Véronique Mathieu, Robert Kiss, Florence Lefranc, Louis Boon, Jochen Belmans, Stefaan W Van Gool, Holger Gerhardt, Karim Amighi, Steven De Vleeschouwer
In this study, we evaluated the consequences of reducing Galectin-1 (Gal-1) in the tumor micro-environment (TME) of glioblastoma multiforme (GBM), via nose-to-brain transport. Gal-1 is overexpressed in GBM and drives chemo- and immunotherapy resistance. To promote nose-to-brain transport, we designed siRNA targeting Gal-1 (siGal-1) loaded chitosan nanoparticles that silence Gal-1 in the TME. Intranasal siGal-1 delivery induces a remarkable switch in the TME composition, with reduced myeloid suppressor cells and regulatory T cells, and increased CD4+ and CD8+ T cells...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28441391/apigenin-inhibits-tnf%C3%AE-il-1%C3%AE-induced-ccl2-release-through-ikbk-epsilon-signaling-in-mda-mb-231-human-breast-cancer-cells
#20
David Bauer, Natalie Redmon, Elizabeth Mazzio, Karam F Soliman
Mortality associated with breast cancer is attributable to aggressive metastasis, to which TNFα plays a central orchestrating role. TNFα acts on breast tumor TNF receptors evoking the release of chemotactic proteins (e.g. MCP-1/CCL2). These proteins direct inward infiltration/migration of tumor-associated macrophages (TAMs), tumor-associated neutrophils (TANs), myeloid-derived suppressor cells (MDSCs), T-regulatory cells (Tregs), T helper IL-17-producing cells (Th17s), metastasis-associated macrophages (MAMs) and cancer-associated fibroblasts (CAFs)...
2017: PloS One
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