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https://www.readbyqxmd.com/read/28087664/human-blood-cd1c-dendritic-cells-encompass-cd5high-and-cd5low-subsets-that-differ-significantly-in-phenotype-gene-expression-and-functions
#1
Xiangyun Yin, Haisheng Yu, Xiaoyang Jin, Jingyun Li, Hao Guo, Quanxing Shi, Zhao Yin, Yong Xu, Xuefei Wang, Rong Liu, Shouli Wang, Liguo Zhang
There are three major dendritic cell (DC) subsets in both humans and mice, that is, plasmacytoid DCs and two types of conventional DCs (cDCs), cDC1s and cDC2s. cDC2s are important for polarizing CD4(+) naive T cells into different subsets, including Th1, Th2, Th17, Th22, and regulatory T cells. In mice, cDC2s can be further divided into phenotypically and functionally distinct subgroups. However, subsets of human cDC2s have not been reported. In the present study, we showed that human blood CD1c(+) cDCs (cDC2s) can be further separated into two subpopulations according to their CD5 expression status...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28081153/dermal-%C3%AE-%C3%AE-t-cells-do-not-freely-re-circulate-out-of-skin-and-produce-il-17-to-promote-neutrophil-infiltration-during-primary-contact-hypersensitivity
#2
Xiaodong Jiang, Chang Ook Park, Jenna Geddes Sweeney, Min Jae Yoo, Olivier Gaide, Thomas Seth Kupper
The role of mouse dermal γδ T cells in inflammatory skin disorders and host defense has been studied extensively. It is known that dendritic epidermal T cells (DETC) have a monomorphic γδ T cell receptor (TCR) and reside in murine epidermis from birth. We asked if dermal γδ cells freely re-circulated out of skin, or behaved more like dermal resident memory T cells (TRM) in mice. We found that, unlike epidermal γδ T cells (DETC), dermal γδ cells are not homogeneous with regard to TCR, express the tissue resident T cell markers CD69 and CD103, bear skin homing receptors, and produce IL-17 and IL-22...
2017: PloS One
https://www.readbyqxmd.com/read/28069865/interleukin-22-restored-mitochondrial-damage-and-impaired-glucose-stimulated-insulin-secretion-through-down-regulation-of-uncoupling-protein-2-in-ins-1-cells
#3
Minling Hu, Hanxiao Lin, Li Yang, Yanzhen Cheng, Hua Zhang
Defective glucose-stimulated insulin secretion (GSIS) induced by chronic exposure to fatty acids is a hallmark of type 2 diabetes (T2D). Interleukin-22 (IL-22) has been shown to exert beneficial effects on insulin secretion and to protect pancreatic β-cells from stress. Moreover, uncoupling protein-2 (UCP-2) plays a central role in the regulation of GSIS and β-cell dysfunction, whereas the role of UCP-2 in IL-22-enhanced glycemic control under conditions of lipotoxicity remains unclear. In this present study, we investigated the effects of IL-22 on rat insulin-secreting cells (INS-1 cells) and the mechanisms that underlie IL-22 and lipotoxicity-impaired GSIS in vitro...
January 7, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28065580/fatigue-favors-in-vitro-th1-and-th17-like-cell-expansion-and-reduces-corticoid-sensitivity-in-ms-patients
#4
Hélcio Alvarenga-Filho, Marisa Salles, Joana Hygino, Thais B Ferreira, Priscila M Sacramento, Clarice Monteiro, Claudia Cristina F Vasconcelos, Regina Maria Papais Alvarenga, Cleonice A M Bento
Fatigue is a common "ghost" symptom in patients with multiple sclerosis (MS), an autoimmune disease mediated by T cells that target myelin antigens of the central nervous system. As fatigue has been associated with inflammatory states, its occurrence may negatively impact MS progression. The aim of this study was to evaluate the impact of fatigue on the cytokine profile of patients with relapsing-remitting (RR) MS. For our study, blood were collected from MS patients in clinical remission phase with (n=15) and without (n=15) fatigue...
December 30, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28064069/immunization-with-leishmania-donovani-protein-disulfide-isomerase-dna-construct-induces-th1-and-th17-dependent-immune-response-and-protection-against-experimental-visceral-leishmaniasis-in-balb-c-mice
#5
Ajay Amit, Vijayamahantesh, Manas R Dikhit, Ashish Kumar Singh, Vikash Kumar, Shashi S Suman, Ashu Singh, Akhilesh Kumar, Ajit Kumar Thakur, Vidyanand Ravi Das, Pradeep Das, Sanjiva Bimal
In the present study, the efficacy of Leishmania donovani protein disulfide isomerase (LdPDI) as a DNA vaccine was evaluated in BALB/C mice. Mice immunized with the LdPDI-DNA construct were found to be the most immuno-reactive, as the construct induced higher T-cell proliferation. The increased T-cell proliferation was associated with a substantial rise in Th1 and Th17+ CD4 cell response and triggered a higher proportion of CD8+ T cells for the release of interferon-gamma along with a reduced splenic parasite load on Days20 and 60 post challenge (PC)...
January 5, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28051088/lacrimal-gland-derived-il-22-regulates-il-17-mediated-ocular-mucosal-inflammation
#6
Y W Ji, S K Mittal, H S Hwang, E-J Chang, J H Lee, Y Seo, A Yeo, H Noh, H S Lee, S K Chauhan, H K Lee
Inflammatory damage of mucosal surface of the eye is a hallmark of dry eye disease (DED) and, in severe cases, can lead to significant discomfort, visual impairment, and blindness. DED is a multifactorial autoimmune disorder with a largely unknown pathogenesis. Using a cross-sectional patient study and a well-characterized murine model of DED, herein we investigated the immunoregulatory function of interleukin-22 (IL-22) in the pathogenesis of DED. We found that IL-22 levels were elevated in lacrimal fluids of DED patients and inversely correlated with severity of disease...
January 4, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28039300/pharmacological-inhibition-of-bromodomain-proteins-suppresses-retinal-inflammatory-disease-and-downregulates-retinal-th17-cells
#7
Malihe Eskandarpour, Robert Alexander, Peter Adamson, Virginia L Calder
Experimental autoimmune uveitis (EAU), in which CD4(+) Th1 and/or Th17 cells are immunopathogenic, mimics various clinical features of noninfectious uveitis in humans. The impact of bromodomain extraterminal (BET) inhibitors on Th17 cell function was studied in a mouse model of EAU in vivo and in mouse and human Th17 cells in vitro. Two BET inhibitors (GSK151 and JQ1) were able to ameliorate the progression of inflammation in EAU and in mouse CD4(+) T cells in vitro, downregulating levels of Th17 cells. Additionally, the uveitogenic capacity of Th17 cells to transfer EAU was abrogated by BET inhibitors in an adoptive transfer model...
December 30, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28038358/il-22-promotes-fas-expression-in-oligodendrocytes-and-inhibits-foxp3-expression-in-t-cells-by-activating-the-nf-%C3%AE%C2%BAb-pathway-in-multiple-sclerosis
#8
Jin Zhen, Jun Yuan, Yongwang Fu, Runxiu Zhu, Meiling Wang, Hong Chang, Yan Zhao, Dong Wang, Zuneng Lu
Multiple sclerosis (MS) is characterized by an increase in interleukin-22 and Fas, and a decrease in FOXP3, among other factors. In this study, we examined patients with MS and healthy control subjects and used the experimental autoimmune encephalomyelitis (EAE) animal model to identify the effects of IL-22 on oligodendrocytes and T cells in MS development. In MS, the expression of Fas in oligodendrocytes and IL-22 in CD4(+)CCR4(+)CCR6(+)CCR10(+) T cells was enhanced. Ikaros and FOXP3 were both decreased in T cells...
December 27, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/28034757/vancomycin-pre-treatment-impairs-tissue-healing-in-experimental-colitis-importance-of-innate-lymphoid-cells
#9
Di Zhao, Chenwen Cai, Qing Zheng, Shuang Jin, Dongjuan Song, Jun Shen, Zhihua Ran
BACKGROUND AND AIMS: The interplay between luminal microbes and innate immunity during colonic epithelial repair has been well noted. At the same time, antibiotic has widely been used during flare-ups of ulcerative colitis. The possible effects of luminal microbiota disruption caused by antibiotics usage on epithelial repairing have been scarcely discussed. Innate lymphoid cells (ILCs) embedded in the lamina propria can be modulated by gut microbes, resulting in altered colonic IL-22/pSTAT3 levels, which is considered a prominent molecular axis in tissue repairing after epithelium damage...
December 27, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28030850/changes-of-circulating-th22-cells-in-children-with-hand-foot-and-mouth-disease-caused-by-enterovirus-71-infection
#10
Dawei Cui, Fengyun Zhong, Jie Lin, Yidong Wu, Quan Long, Xianzhi Yang, Qiaoyun Zhu, Li Huang, Qifen Mao, Zhaoxia Huo, Zhe Zhou, Guoliang Xie, Shufa Zheng, Fei Yu, Yu Chen
Interleukin (IL)-22+CD4+T (Th22) cells play crucial roles in the pathogenesis of autoimmune diseases and infectious diseases, although the role of Th22 cells remains largely unclear in children with hand, foot, and mouth disease (HFMD) caused by enterovirus 71 (EV71). This study aims to explore the role of circulating IL-22+IL-17A-CD4+T (cTh22) cells in children with EV71-associated HFMD. We found that during the acute stage of illness, the frequencies of cTh22 and circulating IL-22+IL-17A+CD4+T (IL-22+cTh17) cells in CD4+T cells infrom affected patients, and especially in severely affected patients, were significantly higher than in healthy controls (HC)...
December 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/28027499/imbalance-between-the-anti-and-pro-inflammatory-milieu-in-blood-leukocytes-of-autistic-children
#11
Sheikh F Ahmad, Ahmed Nadeem, Mushtaq A Ansari, Saleh A Bakheet, Sabry M Attia, Khairy M A Zoheir, Laila Yousef Al-Ayadhi, Mohammad Z Alzahrani, Abdulaziz M S Alsaad, Moureq R Alotaibi, Adel R A Abd-Allah
Accumulating evidence suggests an association between immune dysfunction and autism disorders in a significant subset of children. In addition, an imbalance between pro- and anti-inflammatory pathways has been proposed to play an important role in the pathogenesis of several neurodevelopmental disorders including autism; however, the role of anti-inflammatory molecules IL-27 and CTLA-4 and pro-inflammatory cytokines IL-21 and IL-22 has not previously been explored in autistic children. In the current study, we investigated the expression of IL-21, IL-22, IL-27, and CD152 (CTLA-4) following an in-vitro immunological challenge of peripheral blood mononuclear cells (PBMCs) from children with autism (AU) or typically-developing children (TD) with phorbol-12-myristate 13-acetate (PMA) and ionomycin...
December 24, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/28011152/adenosine-a2a-receptor-stimulation-blocks-development-of-nonalcoholic-steatohepatitis-in-mice-by-multilevel-inhibition-of-signals-that-cause-immunolipotoxicity
#12
Elisa Alchera, Simona Rolla, Chiara Imarisio, Valentina Bardina, Guido Valente, Francesco Novelli, Rita Carini
Lipotoxicity and immunoinflammation are associated with the evolution of steatosis toward nonalcoholic steatohepatitis (NASH). This study reports the ability of adenosine A2a receptor (A2aR) activation to inhibit NASH development by modulating the responses of CD4(+) T-helper (Th) cells to avoid an immuno-mediated potentiation of lipotoxicity. The effect of the A2aR agonist CGS21680 on immunoinflammatory signals, CD4(+)Th cell infiltration and immunolipotoxicity was analyzed in steatotic C57BL/6 mice fed with a methionine-choline-deficient (MCD) diet and in mouse hepatocytes exposed to palmitic acid (PA)...
December 6, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28002842/efficacy-of-antibody-to-pnag-against-keratitis-caused-by-fungal-pathogens
#13
Ge Zhao, Tanweer S Zaidi, Cagla Bozkurt-Guzel, Tauqeer H Zaidi, James A Lederer, Gregory P Priebe, Gerald B Pier
Purpose: Developing immunotherapies for fungal eye infections is a high priority. We analyzed fungal pathogens for expression of the surface polysaccharide, poly-N-acetyl glucosamine (PNAG), and used a mouse model of ocular keratitis caused by Aspergillus flavus, A. fumigatus, or Fusarium solani to determine if PNAG was an immunotherapy target and requirements for ancillary cellular and molecular immune effectors. Methods: Enzyme-linked immunosorbent assay (ELISA) or immunofluorescence was used to detect PNAG on fungal cells...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27999243/serum-levels-of-il-10-and-il-22-cytokines-in-patients-with-psoriasis
#14
Mohammad Reza Sobhan, Mahmood Farshchian, Ali Hoseinzadeh, Hamid Reza Ghasemibasir, Ghasem Solgi
BACKGROUND: As a chronic inflammatory condition, psoriasis results from an interaction between genetic and immunologic factors in a predisposing environment. In spite of compelling evidence for the role of T cells and cytokines in psoriasis, interleukin (IL)-10 and IL-22 have not been sufficiently investigated. OBJECTIVE: To assess the serum levels of IL-10 and IL-22 in patients with psoriasis compared to healthy controls. METHODS: A total of 28 patients with psoriasis were compared with 28 age and sex-matched healthy subjects...
December 2016: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/27998870/-expressions-of-inflammatory-cytokines-in-intestinal-mucosa-and-their-prognostic-value-in-patients-with-ulcerative-colitis
#15
An-Na Lin, Yu-Qing Li, Mu-Xiao Zhong, Jiang Liu, Qian Dai, Wei Zhu, Ya-Li Zhang
OBJECTIVE: To detect the expressions of IL-17, IL-23, IL-22 and IL-11 in the intestinal mucosa of patients with ulcerative colitis (UC) and analyze their prognostic values. METHODS: Forty patients with active UC, 15 with UC in remission and 15 healthy subjects were examined for the expressions and distribution of IL-17, IL-23, IL-22, and IL-11 in the colorectal mucosausing immunohistochemistry. We further collected the data from 40 patients with routine therapy and regular follow-up and compared the expressions of those cytokines according to the condition of mucosal healing...
December 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27994950/cytokine-signaling-regulating-adipose-stromal-cell-trafficking
#16
Yan Zhang, Mikhail G Kolonin
Adipocyte progenitors, known as adipose stromal cells (ASC), can become mobilized, recruited by tumors, and contribute to cancer progression. Mechanisms underlying ASC trafficking have remained obscure. We recently reported that CXCL1 expressed by cancer cells chemoattracts ASC expressing CXCR1 in obesity. As a candidate mechanism of CXCL1 activation, we identified interleukin (IL)-22, systemic circulation of which is increased in obesity. It has been reported that IL-22 signaling through IL-22R is upstream of CXCL1...
October 2016: Adipocyte
https://www.readbyqxmd.com/read/27994167/immune-reconstitution-after-allogeneic-hematopoietic-stem-cell-transplantation-time-to-t-up-the-thymus
#17
REVIEW
Mohammed S Chaudhry, Enrico Velardi, Florent Malard, Marcel R M van den Brink
The success of allogeneic hematopoietic stem cell transplantation, a key treatment for many disorders, is intertwined with T cell immune reconstitution. The thymus plays a key role post allogeneic hematopoietic stem cell transplantation in the generation of a broad but self-tolerant T cell repertoire, but it is exquisitely sensitive to a range of insults during the transplant period, including conditioning regimens, corticosteroids, infections, and graft-versus-host disease. Although endogenous thymic repair is possible it is often suboptimal, and there is a need to develop exogenous strategies to help regenerate the thymus...
January 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27990709/the-importance-of-th22-and-tc22-cells-in-the-pathogenesis-of-helicobacter-pylori-associated-gastric-diseases
#18
Seyedeh Azra Shamsdin, Abdolvahab Alborzi, Manoochehr Rasouli, Abbas Ghaderi, Kamran B Lankrani, Seyed Mohsen Dehghani, Gholam Reza Pouladfar
BACKGROUND: An association exists between Helicobacter pylori (H. pylori), peptic ulcers, gastritis, and sometimes gastric carcinomas. Th22 cells have protective and inflammatory roles in defense against microbes. AIM: We investigated the frequencies of Th22, Tc22, Th22/17, and Tc22/17 cells in addition to the changes in levels of cytokines IL-22, IL-6, IL-23, TNF-α, IL-1β, and TGF-β in sera from patients with H. pylori-associated gastritis, and peptic ulcer, and in uninfected patients...
December 19, 2016: Helicobacter
https://www.readbyqxmd.com/read/27982034/a-tlr9-agonist-promotes-il-22-dependent-pancreatic-islet-allograft-survival-in-type-1-diabetic-mice
#19
Deepak Tripathi, Sambasivan Venkatasubramanian, Satyanarayana S Cheekatla, Padmaja Paidipally, Elwyn Welch, Amy R Tvinnereim, Ramakrishna Vankayalapati
Pancreatic islet transplantation is a promising potential cure for type 1 diabetes (T1D). Islet allografts can survive long term in the liver parenchyma. Here we show that liver NK1.1(+) cells induce allograft tolerance in a T1D mouse model. The tolerogenic effects of NK1.1(+) cells are mediated through IL-22 production, which enhances allograft survival and increases insulin secretion. Increased expression of NKG2A by liver NK1.1(+) cells in islet allograft-transplanted mice is involved in the production of IL-22 and in the reduced inflammatory response to allografts...
December 16, 2016: Nature Communications
https://www.readbyqxmd.com/read/27965670/activated-il-1ri-signaling-pathway-induces-th17-cell-differentiation-via-interferon-regulatory-factor-4-signaling-in-patients-with-relapsing-remitting-multiple-sclerosis
#20
Yonggang Sha, Silva Markovic-Plese
IL-1β plays a crucial role in the differentiation of human Th17 cells. We report here that IL-1RI expression is significantly increased in both naive and memory CD4(+) T cells derived from relapsing-remitting multiple sclerosis (RR MS) patients in comparison to healthy controls. Interleukin 1 receptor (IL-1R)I expression is upregulated in the in vitro-differentiated Th17 cells from RR MS patients in comparison to the Th1 and Th2 cell subsets, indicating the role of IL-1R signaling in the Th17 cell differentiation in RR MS...
2016: Frontiers in Immunology
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