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https://www.readbyqxmd.com/read/29220875/interleukin-21-receptor-signaling-is-not-critically-required-for-imiquimod-induced-psoriasiform-dermatitis-in-mice
#1
Hee Joo Kim, Sung Hee Kim, Tae-Gyun Kim, Je Yun Park, Minseok Lee, Dae Suk Kim, Min-Geol Lee
Psoriasis is largely mediated by interleukin (IL)-23/ T helper (Th) 17 axis, and IL-21 is a pleiotropic cytokine expressed by Th17 cells. Despite previously reported possible pathogenic roles of IL-21 in human psoriasis, we found that IL-21 receptor (IL-21R) signaling was not crucial for imiquimod-induced psoriatic inflammation, using IL-21R-/- mice. The severity of imiquimod-induced psoriatic manifestation and pro-inflammatory Th17 cytokine levels, IL-17A-producing γδ T cells and CD4+ T cells, and in vitro IL-17A production by γδ T cells after IL-23 stimulation was comparable between wild-type and IL-21R-/- mice...
December 8, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/29220828/prediction-of-radiation-esophagitis-in-non-small-cell-lung-cancer-using-clinical-factors-dosimetric-parameters-and-pretreatment-cytokine-levels
#2
Peter G Hawkins, Philip S Boonstra, Stephen T Hobson, James A Hayman, Randall K Ten Haken, Martha M Matuszak, Paul Stanton, Gregory P Kalemkerian, Theodore S Lawrence, Matthew J Schipper, Feng-Ming Spring Kong, Shruti Jolly
Radiation esophagitis (RE) is a common adverse event associated with radiotherapy for non-small cell lung cancer (NSCLC). While plasma cytokine levels have been correlated with other forms of radiation-induced toxicity, their association with RE has been less well studied. We analyzed data from 126 patients treated on 4 prospective clinical trials. Logistic regression models based on combinations of dosimetric factors [maximum dose to 2 cubic cm (D2cc) and generalized equivalent uniform dose (gEUD)], clinical variables, and pretreatment plasma levels of 30 cytokines were developed...
December 5, 2017: Translational Oncology
https://www.readbyqxmd.com/read/29218113/age-associated-alteration-in-th17-cell-response-is-related-to-endothelial-cell-senescence-and-atherosclerotic-cerebral-infarction
#3
Qing Li, Shaowei Ding, Yuan Min Wang, Xiaoling Xu, Zuojun Shen, Rui Fu, Mengdie Liu, Chaojie Hu, Cuiping Zhang, Qi Cao, Yiping Wang
T-helper 17 (Th17) cells produce Interleukin-17 (IL-17) that plays an important role in host-defense. However, little is known whether aging affects the functions of human Th17 cells. In this study, we examine age-associated alteration in Th17-cell response; correlation between Th17-cells and endothelial cell senescence; and the occurrence of acute cerebral infarction (ACI). First, we examined Th17-frequency, phenotyping, key transcription factors, and relevant cytokines in healthy elderly, middle-aged and young-people along with elderly-patients with ACI...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29216915/rheumatoid-arthritis-bone-marrow-environment-supports-th17-response
#4
Ewa Kuca-Warnawin, Weronika Kurowska, Monika Prochorec-Sobieszek, Anna Radzikowska, Tomasz Burakowski, Urszula Skalska, Magdalena Massalska, Magdalena Plebańczyk, Barbara Małdyk-Nowakowska, Iwona Słowińska, Robert Gasik, Włodzimierz Maśliński
BACKGROUND: Rheumatoid arthritis (RA) is a systemic, autoimmune disease leading to joint destruction and ultimately disability. Bone marrow (BM) is an important compartment in RA, where pathological processes from "outside the joint" can occur. IL-17 is a cytokine that exerts proinflammatory effects and participates in the process of bone destruction. It is believed that IL-17 is involved in pathogenesis of RA. However, little is known about the biology of this cytokine in BM. In the present study we investigated Th17-related cytokines in RA BM...
December 8, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29216299/recombinant-vaccinia-virus-coded-interferon-inhibitor-b18r-expression-refolding-and-a-use-in-a-mammalian-expression-system-with-a-rna-vector
#5
Yuriy G Kim, Aliya Zh Baltabekova, Erzhan E Zhiyenbay, Altynai S Aksambayeva, Zhadyra S Shagyrova, Rinat Khannanov, Erlan M Ramanculov, Alexandr V Shustov
B18R protein of Vaccinia virus binds to type I interferons and inhibits activation of interferon-mediated signal transduction. Cells which have unimpaired interferon signaling such as primary cell cultures or some industrially important cell lines are capable of development of an antiviral state. An establishment of the antiviral state limits replication of RNA-viruses and can suppress replication of RNA vectors. The interferon inhibitor B18R effectively prevents the establishment of the antiviral state. For this reason, B18R has become a ubiquitous component of protocols for epigenetic reprogramming which use transfections of RNA replicons or mRNA...
2017: PloS One
https://www.readbyqxmd.com/read/29215459/complete-b-cell-deficiency-reduces-allograft-inflammation-and-intragraft-macrophages-a-rat-kidney-transplant-model
#6
Sarah E Panzer, Nancy A Wilson, Bret M Verhoven, Ding Xiang, C Dustin Rubinstein, Robert R Redfield, Weixiong Zhong, Shannon R Reese
BACKGROUND: Increasingly it is being appreciated that B cells have broad roles beyond the humoral response, and are able to contribute to and regulate inflammation. The specific role of B cells in the pathogenesis of early allograft inflammation remains unclear. METHODS: To address this question, we generated B cell deficient Lewis rats via CRISPR technology. In a full mismatch transplant model, kidneys from Brown Norway donors were transplanted into B cell deficient Lewis recipients (B) or wild type Lewis recipients...
December 5, 2017: Transplantation
https://www.readbyqxmd.com/read/29215199/neurotrophically-induced-mesenchymal-progenitor-cells-derived-from-induced-pluripotent-stem-cells-enhance-neuritogenesis-via-neurotrophin-and-cytokine-production
#7
Rachel M Brick, Aaron X Sun, Rocky S Tuan
Adult tissue-derived mesenchymal stem cells (MSCs) are known to produce a number of bioactive factors, including neurotrophic growth factors, capable of supporting and improving nerve regeneration. However, with a finite culture expansion capacity, MSCs are inherently limited in their lifespan and use. We examined here the potential utility of an alternative, mesenchymal-like cell source, derived from induced pluripotent stem cells, termed induced mesenchymal progenitor cells (MiMPCs). We found that several genes were upregulated and proteins were produced in MiMPCs that matched those previously reported for MSCs...
December 7, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29215061/local-production-of-activated-factor-x-in-atherosclerotic-plaque-induced-vascular-smooth-muscle-cell-senescence
#8
Fumihiro Sanada, Jun Muratsu, Rei Otsu, Hideo Shimizu, Nobutaka Koibuchi, Kazutaka Uchida, Yoshiaki Taniyama, Shinichi Yoshimura, Hiromi Rakugi, Ryuichi Morishita
Our previous study demonstrated that coagulation factor Xa (FXa) induced endothelial cell senescence, resulting in inflammation and impaired angiogenesis. This mechanism is dictated through protease-activated receptors, PARs, insulin-like growth factor-binding protein 5 (IGFBP-5), and p53. Activation of PARs contributes to the pathophysiology of several chronic inflammatory diseases, including atherosclerosis. Thus, we speculated that similar mechanism might participate in the progression of atherosclerotic plaques...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29213193/anti-inflammatory-activity-of-crude-venom-isolated-from-parasitoid-wasp-bracon-hebetor-say
#9
Evelyn Saba, Tahir Shafeeq, Muhammad Irfan, Yuan Yee Lee, Hyuk-Woo Kwon, Myung Gi Seo, Sang-Joon Park, Kyeong-Yeoll Lee, Man Hee Rhee
Pest control in the agricultural fields, a major concern globally, is currently achieved through chemical or biological methods. Chemical methods, which leave toxic residue in the produce, are less preferred than biological methods. Venoms injected by stings of various wasps that kill the pest is considered as the examples of the biological method. Although several studies have investigated the biological control of pests through these venoms, very few studies have reported the effects of these venoms on mammalian cells...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29213081/pak2-is-essential-for-the-function-of-foxp3-regulatory-t-cells-through-maintaining-a-suppressive-treg-phenotype
#10
Kyle L O'Hagan, Stephen D Miller, Hyewon Phee
Foxp3, a key transcription factor that drives lineage differentiation of regulatory T cells (Tregs), was thought to imprint a unique and irreversible genetic signature within Tregs. Recent evidence, however, suggests that loss or attenuation of Foxp3 expression can cause Tregs to de-differentiate into effector T cells capable of producing proinflammatory cytokines. Herein, we report that the signaling kinase, p21-activated kinase 2 (Pak2), is essential for maintaining Treg stability and suppressive function...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212947/requirement-of-treg-intrinsic-ctla4-pkc%C3%AE-signaling-pathway-for-suppressing-tumor-immunity
#11
Christophe Pedros, Ann J Canonigo-Balancio, Kok-Fai Kong, Amnon Altman
The ability of Tregs to control the development of immune responses is essential for maintaining immune system homeostasis. However, Tregs also inhibit the development of efficient antitumor responses. Here, we explored the characteristics and mechanistic basis of the Treg-intrinsic CTLA4/PKCη signaling pathway that we recently found to be required for contact-dependent Treg-mediated suppression. We show that PKCη is required for the Treg-mediated suppression of tumor immunity in vivo. The presence of PKCη-deficient (Prkch-/-) Tregs in the tumor microenvironment was associated with a significantly increased expression of the costimulatory molecule CD86 on intratumoral CD103+ DCs, enhanced priming of antigen-specific CD8+ T cells, and greater levels of effector cytokines produced by these cells...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29212859/human-hair-follicle-transcriptome-profiling-a-minimally-invasive-tool-to-assess-molecular-adaptations-upon-low-volume-high-intensity-interval-training
#12
Jing Zhang, Sarah J Wallace, Maria Y Shiu, Ingrid Smith, Shawn G Rhind, Valerie S Langlois
High-intensity interval training (HIIT) has become a popular fitness training approach under both civilian and military settings. Consisting of brief and intense exercise intervals, HIIT requires less time commitment yet is able to produce the consistent targeted physical adaptations as conventional endurance training. To effectively characterize and monitor HIIT-induced cellular and molecular responses, a highly accessible yet comprehensive biomarker discovery source is desirable. Both gene differential expression (DE) and gene set (GS) analyses were conducted using hair follicle transcriptome established from pre and postexercise subjects upon a 10-day HIIT program by RNA-Seq, Comparing between pre and posttraining groups, differentially expressed protein coding genes were identified...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29212806/syndecan-1-promotes-wnt-%C3%AE-catenin-signaling-in-multiple-myeloma-by-presenting-wnts-and-r-spondins
#13
Zemin Ren, Harmen van Andel, Wim de Lau, Robin B Hartholt, Madelon M Maurice, Hans Clevers, Marie José Kersten, Marcel Spaargaren, Steven T Pals
Multiple myeloma (MM) is characterized by the expansion of malignant plasma cells in the bone marrow (BM). Most MMs display aberrant Wnt/β-catenin signaling, which drives proliferation; however, they lack oncogenic Wnt-pathway mutations, suggesting activation by autocrine Wnt ligands and/or paracrine Wnts from the BM microenvironment. Expression of the heparan sulfate proteoglycan (HSPG) syndecan-1 is a hallmark of MM. Syndecan-1 is a critical player in the complex reciprocal interaction between MM cells and their BM niche, mediating growth factor/cytokine binding and signaling by its heparan sulfate (HS) chains...
December 6, 2017: Blood
https://www.readbyqxmd.com/read/29212740/il-23-interleukin-23-producing-conventional-dendritic-cells-control-the-detrimental-il-17-interleukin-17-response-in-stroke
#14
Mathias Gelderblom, Mattia Gallizioli, Peter Ludewig, Vivien Thom, Priyadharshini Arunachalam, Björn Rissiek, Christian Bernreuther, Markus Glatzel, Thomas Korn, Thiruma Valavan Arumugam, Jan Sedlacik, Christian Gerloff, Eva Tolosa, Anna M Planas, Tim Magnus
BACKGROUND AND PURPOSE: Inflammatory mechanisms can exacerbate ischemic tissue damage and worsen clinical outcome in patients with stroke. Both αβ and γδ T cells are established mediators of tissue damage in stroke, and the role of dendritic cells (DCs) in inducing the early events of T cell activation and differentiation in stroke is not well understood. METHODS: In a murine model of experimental stroke, we defined the immune phenotype of infiltrating DC subsets based on flow cytometry of surface markers, the expression of ontogenetic markers, and cytokine levels...
December 6, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29209315/gradual-increase-of-fc%C3%AE-riiia-cd16a-expression-and-shift-toward-ifn-%C3%AE-secretion-during-differentiation-of-cd56dim-natural-killer-cells
#15
Laurie Lajoie, Nicolas Congy-Jolivet, Armelle Bolzec, Gilles Thibault
Natural killer (NK) cell effector functions include cytotoxicity and secretion of cytokines such as interferon-γ (IFN-γ). The immature CD56bright subset of human NK cells lacks expression of FcγRIIIa/CD16a, one of the low-affinity immunoglobulin G receptors, or exhibits low-density expression (CD56brightCD16-/dim) and produces IFN-γ in response to cytokine stimulation, whereas the mature CD56dimCD16+ subset is the most cytotoxic one. A further differentiation/maturation of the latter subset according to the gradual loss of NKG2A and/or gain of KIR2DL (CD158a and CD158b) has been demonstrated and the ability to produce IFN-γ in response to activating receptor (AR) co-engagement is gradually acquired during terminal differentiation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29209310/alum-activates-the-bovine-nlrp3-inflammasome
#16
Ciaran Harte, Aoife L Gorman, S McCluskey, Michael Carty, Andrew G Bowie, C J Scott, Kieran G Meade, Ed C Lavelle
There has been a move away from vaccines composed of whole or inactivated antigens toward subunit-based vaccines, which although safe, provide less immunological protection. As a result, the use of adjuvants to enhance and direct adaptive immune responses has become the focus of much targeted bovine vaccine research. However, the mechanisms by which adjuvants work to enhance immunological protection in many cases remains unclear, although this knowledge is critical to the rational design of effective next generation vaccines...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29207498/steppogenin-isolated-from-cudrania-tricuspidata-shows-antineuroinflammatory-effects-via-nf-%C3%AE%C2%BAb-and-mapk-pathways-in-lps-stimulated-bv2-and-primary-rat-microglial-cells
#17
Dong-Cheol Kim, Tran Hong Quang, Hyuncheol Oh, Youn-Chul Kim
Excessive microglial stimulation has been recognized in several neurodegenerative diseases, including Parkinson's disease (PD), Alzheimer's disease (AD), amyotropic lateral sclerosis (ALS), HIV-associated dementia (HAD), multiple sclerosis (MS), and stroke. When microglia are stimulated, they produce proinflammatory mediators and cytokines, including nitric oxide (NO) derived from inducible NO synthase (iNOS), prostaglandin E2 (PGE₂) derived from cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-12 (IL-12), and interleukin-6 (IL-6)...
December 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29206151/an-overview-of-l-amino-acid-oxidase-functions-from-bacteria-to-mammals-focus-on-the-immunoregulatory-phenylalanine-oxidase-il4i1
#18
REVIEW
Flavia Castellano, Valérie Molinier-Frenkel
l-amino acid oxidases are flavin adenine dinucleotide-dependent enzymes present in all major kingdom of life, from bacteria to mammals. They participate in defense mechanisms by limiting the growth of most bacteria and parasites. A few mammalian LAAOs have been described, of which the enzyme "interleukin-4 induced gene 1" (IL4I1) is the best characterized. IL4I1 mainly oxidizes l-phenylalanine. It is a secreted enzyme physiologically produced by antigen presenting cells of the myeloid and B cell lineages and T helper type (Th) 17 cells...
December 5, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29205464/interleukin-17-family-cytokines-in-protective-immunity-against-infections-role-of-hematopoietic-cell-derived-and-non-hematopoietic-cell-derived-interleukin-17s
#19
REVIEW
Goro Matsuzaki, Masayuki Umemura
Interleukin (IL)-17 family cytokines consisting of six members participate in immune response in infections, autoimmune diseases and inflammatory diseases. The prototype cytokine of the family, IL-17A, was originally identified from CD4+ T cells which are now termed Th17. Later IL-17A-producing cells are expanded to various hematopoietic cells including CD8+ T cells (Tc17), invariant NKT cells, γ δ T cells, non-T non-B lymphocytes termed type 3 innate lymphoid cells (ILC3), and neutrophils. Some members of the IL-17 family cytokines other than IL-17A were also expressed by CD4+ T cells: IL-17E by Th2 cells, and IL-17F by Th17 cells...
December 2, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/29204144/all-trans-retinoic-acid-promotes-an-m1-to-m2-phenotype-shift-and-inhibits-macrophage-mediated-immunity-to-leishmania-major
#20
Natália S Vellozo, Sâmara T Pereira-Marques, Mariela P Cabral-Piccin, Alessandra A Filardy, Flávia L Ribeiro-Gomes, Thaís S Rigoni, George A DosReis, Marcela F Lopes
As key cells, able to host and kill Leishmania parasites, inflammatory monocytes/macrophages are potential vaccine and therapeutic targets to improve immune responses in Leishmaniasis. Macrophage phenotypes range from M1, which express NO-mediated microbial killing, to M2 macrophages that might help infection. Resistance to Leishmaniasis depends on Leishmania species, mouse strain, and both innate and adaptive immunity. C57BL/6 (B6) mice are resistant and control infection, whereas Leishmania parasites thrive in BALB/c mice, which are susceptible to develop cutaneous lesions in the course of infection with Leishmania major, but not upon infection with Leishmania braziliensis...
2017: Frontiers in Immunology
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