keyword
MENU ▼
Read by QxMD icon Read
search

iTreg

keyword
https://www.readbyqxmd.com/read/28732437/effect-of-microrna-21-transfection-on-in-vitro-differentiation-of-human-naive-cd4-t-cells-to-regulatory-t-cells
#1
Haideh Namdari, Mojgan Ghayedi, Jamshid Hadjati, Farhad Rezaei, Kurosh Kalantar, Parisa Rahimzadeh, Eisa Salehi
Regulatory T cells (Tregs) are important components of the immune system that modulate responses of other cells. These cells are involved in peripheral tolerance mechanisms, so defect in development and function of these cells can result in autoimmune disease. Increasing evidence supports the role of microRNAs-21 (miR-21) in the regulation of forkhead box P3 (Foxp3) expression in Tregs. We aimed to determine whether miR-21 transfection to naive CD4+ T cells can be useful in generation of iTregs in-vitro. We investigated in-vitro differentiation of miR-21-transfected naive CD4+ T cells to iTregs and compared these iTregs to cytokine-differentiated iTregs and control group...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28729608/programmed-death-one-homolog-maintains-the-pool-size-of-regulatory-t-cells-by-promoting-their-differentiation-and-stability
#2
Qi Wang, Jianwei He, Dallas B Flies, Liqun Luo, Lieping Chen
Programmed death one homolog (PD-1H) is an immunoglobulin superfamily molecule and primarily acts as a coinhibitor in the initiation of T cell response to antigens. Here, we report that genetic ablation of PD-1H in mice blocks the differentiation of naive T cells to Foxp3(+) inducible Treg cells (iTreg) with a significant decrease of iTreg in lymphoid organs. This effect of PD-1H is highly specific for iTreg because both naturally generated iTreg in gut-related tissues and in vitro induced iTreg by TGF-β were decreased whereas the genesis of natural Treg (nTreg) remains normal...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28710254/the-plasticity-and-stability-of-regulatory-t-cells-during-viral-induced-inflammatory-lesions
#3
Siddheshvar Bhela, Siva Karthik Varanasi, Ujjaldeep Jaggi, Sarah S Sloan, Naveen K Rajasagi, Barry T Rouse
Ocular infection with HSV causes a chronic T cell-mediated inflammatory lesion in the cornea. Lesion severity is affected by the balance of different CD4 T cell subsets, with greater severity occurring when the activity of regulatory T cells (Tregs) is compromised. In this study, fate-mapping mice were used to assess the stability of Treg function in ocular lesions. We show that cells that were once Foxp3(+) functional Tregs may lose Foxp3 and become Th1 cells that could contribute to lesion expression. The instability primarily occurred with IL-2R(lo) Tregs and was shown, in part, to be the consequence of exposure to IL-12...
July 14, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28702462/adoptive-cell-therapy-of-induced-regulatory-t-cells-expanded-by-tolerogenic-dendritic-cells-on-murine-autoimmune-arthritis
#4
Jie Yang, Lidong Liu, Yiming Yang, Ning Kong, Xueyu Jiang, Juan Sun, Rufeng Xie
OBJECTIVE: Tolerogenic dendritic cells (tDCs) can expand TGF-β-induced regulatory T cells (iTregs); however, the therapeutic utility of these expanded iTregs in autoimmune diseases remains unknown. We sought to determine the properties of iTregs expanded by mature tolerogenic dendritic cells (iTregmtDC) in vitro and explore their potential to ameliorate collagen-induced arthritis (CIA) in a mouse model. METHODS: After induction by TGF-β and expansion by mature tDCs (mtDCs), the phenotype and proliferation of iTregmtDC were assessed by flow cytometry...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28702031/alloantigen-induced-regulatory-t-cells-generated-in-presence-of-vitamin-c-display-enhanced-stability-of-foxp3-expression-and-promote-skin-allograft-acceptance
#5
Eirini Nikolouli, Matthias Hardtke-Wolenski, Martin Hapke, Michael Beckstette, Robert Geffers, Stefan Floess, Elmar Jaeckel, Jochen Huehn
Regulatory T cells (Tregs) are critical for the maintenance of immune homeostasis and self-tolerance and can be therapeutically used for prevention of unwanted immune responses such as allotransplant rejection. Tregs are characterized by expression of the transcription factor Foxp3, and recent work suggests that epigenetic imprinting of Foxp3 and other Treg-specific epigenetic signatures genes is crucial for the stabilization of both Foxp3 expression and immunosuppressive properties within Tregs. Lately, vitamin C was reported to enhance the activity of enzymes of the ten-eleven translocation family, thereby fostering the demethylation of Foxp3 and other Treg-specific epigenetic signatures genes in developing Tregs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28677759/analysis-of-murine-and-human-treg-subsets-in-inflammatory-bowel-disease
#6
Xiaoyun Sun, Shaoheng He, Changlong Lv, Xun Sun, Junling Wang, Wenjiao Zheng, Danan Wang
Previous studies have indicated that regulatory T cells serve essential roles in maintaining intestinal homeostasis, however, the role of different Treg subsets in modulating inflammatory bowel disease has still not been addressed clearly. In the present study, the authors measured the percentage of Foxp3+ IL‑10+ TGF‑β+ natural Tregs, Foxp3‑ IL‑10+ TGF‑β‑ induced Tregs, CD127‑ induced Tregs and CD8+ Tregs at different time points in DSS‑induced experimental colitis model in murine lamina propria lymphocytes, mesenteric lymph node and peripheral blood...
July 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28652577/human-in-vitro-induced-regulatory-t-cells-display-dlgh1dependent-and-pkc-%C3%AE-restrained-suppressive-activity
#7
Alexandra Zanin-Zhorov, Sudha Kumari, Keli L Hippen, Sarah C Merkel, Margaret L MacMillan, Bruce R Blazar, Michael L Dustin
In vitro induced human regulatory T cells (iTregs) have demonstrated in vivo therapeutic utility, but pathways regulating their function have not been elucidated. Here, we report that human iTregs generated in vitro from naïve cord blood cells preferentially recruit Disc large homolog 1 (Dlgh1) and exclude protein kinase C (PKC)-θ from immunological synapses formed on supported lipid bilayers with laterally mobile ICAM-1 and anti-CD3 mAb. Also, iTregs display elevated Dlgh1 overall and Dlgh1-dependent p38 phosphorylation, higher levels of phosphatase and tensin homolog (PTEN), and diminished Akt phosphorylation...
June 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620241/tgf-beta-atra-induced-tregs-express-a-selected-set-of-micrornas-involved-in-the-repression-of-transcripts-related-to-th17-differentiation
#8
Josiane Lilian Dos Santos Schiavinato, Rodrigo Haddad, Felipe Saldanha-Araujo, João Baiochi, Amélia Goes Araujo, Priscila Santos Scheucher, Dimas Tadeu Covas, Marco Antonio Zago, Rodrigo Alexandre Panepucci
Regulatory T cells (Tregs) are essential regulators of immune tolerance. atRA and TGF-β can inhibit the polarization of naïve T cells into inflammatory Th17 cells, favoring the generation of stable iTregs, however the regulatory mechanisms involved are not fully understood. In this context, the roles of individual microRNAs in Tregs are largely unexplored. Naïve T cells were immunomagnetically isolated from umbilical cord blood and activated with anti-human CD2/CD3/CD28 beads in the presence of IL-2 alone (CD4Med) or with the addition of TGF-β and atRA (CD4TGF/atRA)...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28600182/mesenchymal-stem-cells-can-induce-regulatory-t-cells-via-modulating-mir-126a-but-not-mir-10a
#9
Maryam Khosravi, Mohammad Hossein Karimi, Mahdokht Hossein Aghdaie, Mehdi Kalani, Sina Naserian, Ali Bidmeshkipour
Among the different immunosuppressive properties attributed to mesenchymal stem cells (MSCs), one relies on their ability to induce regulatory T cells (iTregs) from conventional T cells under particular inflammatory context. Stable Foxp3 expression plays a major role in the phenotypic and functional stability of iTregs. However, the mechanism behind Foxp3 induction in iTregs by MSCs remains unknown. Here, we assessed the possible effect of MSCs on miR-126a and miR-10a expression in iTregs and, consequently on Foxp3 stability, a regulatory pathway that has not yet been explored...
June 18, 2017: Gene
https://www.readbyqxmd.com/read/28599652/regulatory-t-cells-in-multiple-sclerosis-and-myasthenia-gravis
#10
REVIEW
K M Danikowski, S Jayaraman, B S Prabhakar
Multiple sclerosis (MS) is a chronic debilitating disease of the central nervous system primarily mediated by T lymphocytes with specificity to neuronal antigens in genetically susceptible individuals. On the other hand, myasthenia gravis (MG) primarily involves destruction of the neuromuscular junction by antibodies specific to the acetylcholine receptor. Both autoimmune diseases are thought to result from loss of self-tolerance, which allows for the development and function of autoreactive lymphocytes. Although the mechanisms underlying compromised self-tolerance in these and other autoimmune diseases have not been fully elucidated, one possibility is numerical, functional, and/or migratory deficits in T regulatory cells (Tregs)...
June 9, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28598443/ash1l-and-lnc-smad3-coordinate-smad3-locus-accessibility-to-modulate-itreg-polarization-and-t-cell-autoimmunity
#11
Meng Xia, Juan Liu, Shuxun Liu, Kun Chen, Hongyu Lin, Minghong Jiang, Xiaoqing Xu, Yiquan Xue, Wei Liu, Yan Gu, Xiang Zhang, Zhiqing Li, Lin Yi, Youcun Qian, Chen Zhou, Ru Li, Xuan Zhang, Zhanguo Li, Xuetao Cao
Regulatory T (Treg) cells are important for the maintenance of immune homoeostasis and prevention of autoimmune diseases. Epigenetic modifications have been reported to modulate autoimmunity by altering Treg cell fate. Here we show that the H3K4 methyltransferase Ash1l facilitates TGF-β-induced Treg cell polarization in vitro and protects mice from T cell-mediated colitis in vivo. Ash1l upregulates Smad3 expression by directly targeting Smad3 promoter to increase local H3K4 trimethylation. Furthermore, we identify an lncRNA, namely lnc-Smad3, which interacts with the histone deacetylase HDAC1 and silences Smad3 transcription...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28579377/dendritic-cells-conditioned-by-activin-a-induced-regulatory-t-cells-exhibit-enhanced-tolerogenic-properties-and-protect-against-experimental-asthma
#12
Maria Semitekolou, Ioannis Morianos, Aggelos Banos, Dimitris Konstantopoulos, Marina Adamou-Tzani, Tim Sparwasser, Georgina Xanthou
BACKGROUND: Previously, we have demonstrated that regulatory T (Treg) cells, induced by the cytokine activin-A, suppress Th2-mediated allergic responses and linked airway disease. Still, the effects of activin-A-induced Treg cells (act-A-iTreg cells) on the regulation of dendritic cell (DC)-driven allergic inflammation remain elusive. OBJECTIVE: Here, we investigated whether act-A-iTreg cells can modulate DC responses and endow them with enhanced tolerogenic functions...
June 1, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28555437/autoimmunity-in-2016
#13
REVIEW
Carlo Selmi
The number of peer-reviewed articles published during the 2016 solar year and retrieved using the "autoimmunity" key word remained stable while gaining a minimal edge among the immunology articles. Nonetheless, the quality of the publications has been rising significantly and, importantly, acquisitions have become available through scientific journals dedicated to immunology or autoimmunity. Major discoveries have been made in the fields of systemic lupus erythematosus, rheumatoid arthritis, autoimmunity of the central nervous system, vasculitis, and seronegative spondyloarthrithritides...
August 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28543637/evidence-of-the-immunomodulatory-role-of-dual-pi3k-mtor-inhibitors-in-graft-survival
#14
Valery Vilchez, Lilia Turcios, D Allan Butterfield, Mihail I Mitov, Cristin L Coquillard, Anthony J Brandon, Virgilius Cornea, Roberto Gedaly, Francesc Marti
The PI3K/mTOR signaling cascade is fundamental in T-cell activation and fate decisions. We showed the distinct regulation of PI3K/mTOR in regulatory and effector T-cells and proposed the potential therapeutic benefit of targeting this pathway to control the balance between effector and regulatory T-cell activities. Substantial adverse effects in long-term clinical usage of Rapamycin suggest the use of alternative treatments in restraining effector T-cell function in transplant patients. We hypothesize that dual PI3K/mTOR inhibitors may represent an immunosuppressant alternative...
May 24, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28531229/protein-kinase-c-theta-is-dispensable-for-suppression-mediated-by-cd25-cd4-regulatory-t-cells
#15
Kerstin Siegmund, Nikolaus Thuille, Katarzyna Wachowicz, Natascha Hermann-Kleiter, Gottfried Baier
The activation of conventional T cells upon T cell receptor stimulation critically depends on protein kinase C theta (PKCθ). However, its role in regulatory T (Treg) cell function has yet to be fully elucidated. Using siRNA or the potent and PKC family-selective pharmacological inhibitor AEB071, we could show that murine Treg-mediated suppression in vitro is independent of PKCθ function. Likewise, Treg cells of PKCθ-deficient mice were fully functional, showing a similar suppressive activity as wild-type CD25+CD4+ T cells in an in vitro suppression assay...
2017: PloS One
https://www.readbyqxmd.com/read/28503202/stabilization-of-foxp3-expression-by-crispr-dcas9-based-epigenome-editing-in-mouse-primary-t-cells
#16
Masahiro Okada, Mitsuhiro Kanamori, Kazue Someya, Hiroko Nakatsukasa, Akihiko Yoshimura
BACKGROUND: Epigenome editing is expected to manipulate transcription and cell fates and to elucidate the gene expression mechanisms in various cell types. For functional epigenome editing, assessing the chromatin context-dependent activity of artificial epigenetic modifier is required. RESULTS: In this study, we applied clustered regularly interspaced short palindromic repeats (CRISPR)-dCas9-based epigenome editing to mouse primary T cells, focusing on the Forkhead box P3 (Foxp3) gene locus, a master transcription factor of regulatory T cells (Tregs)...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28470889/in-vitro-induction-of-human-regulatory-t-cells-itregs-using-conditions-of-low-tryptophan-plus-kynurenines
#17
K L Hippen, R S O'Connor, A M Lemire, A Saha, E A Hanse, N C Tennis, S C Merkel, A Kelekar, J L Riley, B L Levine, C H June, L S Kean, M L MacMillan, J S Miller, J E Wagner, D H Munn, B R Blazar
Thymic regulatory T cells (tTreg) or induced Tregs (iTregs) suppress murine acute graft-versus-host disease (GVHD). Previously we demonstrated that plasmacytoid dendritic cell (pDC) indoleamine 2,3-dioxygenase (IDO) fosters the in vitro development of human iTregs via tryptophan depletion and kynurenine (Kyn) metabolites. We now show that stimulation of naïve CD4+ T cells in low tryptophan (Low Trp) plus Kyn supports human iTreg generation. In vitro, low Trp+Kyn iTreg and tTregs potently suppress Teffector cell proliferation equivalently but are phenotypically distinct...
May 4, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28467968/transcription-factor-c-rel-is-indispensable-for-generation-of-thymic-but-not-of-peripheral-foxp3-regulatory-t-cells
#18
Maik Luu, Elena Jenike, Niyati Vachharajani, Alexander Visekruna
The transcription factor c-Rel has been shown to be crucial for development of regulatory T cells (Tregs). Recent studies have reported that the expression of transcription factor Helios in Foxp3+ Tregs correlates with thymic origin of these cells (tTregs). Notably, we found that only the Helios+Foxp3+ Treg cell population was substantially reduced in c-Rel deficient mice. In contrast to a defective tTreg development, we observed an expansion of mucosal Tregs during the induction of acute colitis in rel-/- mice...
April 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28408906/cellular-and-molecular-dynamics-of-th17-differentiation-and-its-developmental-plasticity-in-the-intestinal-immune-response
#19
REVIEW
Suniti Bhaumik, Rajatava Basu
After emerging from the thymus, naive CD4 T cells circulate through secondary lymphoid tissues, including gut-associated lymphoid tissue of the intestine. The activation of naïve CD4 T cells by antigen-presenting cells offering cognate antigen initiate differentiation programs that lead to the development of highly specialized T helper (Th) cell lineages. Although initially believed that developmental programing of effector T cells such as T helper 1 (Th1) or T helper 2 (Th2) resulted in irreversible commitment to a fixed fate, subsequent studies have demonstrated greater flexibility, or plasticity, in effector T cell stability than originally conceived...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28352109/il-1%C3%AE-induced-hif-1%C3%AE-inhibits-the-differentiation-of-human-foxp3-t-cells
#20
Lea M Feldhoff, Cesar M Rueda, Maria E Moreno-Fernandez, Johanna Sauer, Courtney M Jackson, Claire A Chougnet, Jan Rupp
Differentiation of regulatory Treg (Treg) in the periphery is critical to control inflammatory processes. Although polarization of inducible Treg (iTreg) often occurs in an inflammatory environment, the effects exerted by inflammation on human iTreg differentiation have not been extensively studied. We observed that IL-1β significantly reduced the frequency of FOXP3(+) T cells under iTreg-polarizing conditions. Mechanistically, we show that IL-1β activated mTORC1 and downstream upregulated hypoxia inducible factor-1 (HIF-1α) expression...
March 28, 2017: Scientific Reports
keyword
keyword
86305
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"