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https://www.readbyqxmd.com/read/27913094/hematopoietic-stem-cell-niches-produce-lineage-instructive-signals-to-control-multipotent-progenitor-differentiation
#1
Ana Cordeiro Gomes, Takahiro Hara, Vivian Y Lim, Dietmar Herndler-Brandstetter, Erin Nevius, Tatsuki Sugiyama, Shizue Tani-Ichi, Susan Schlenner, Ellen Richie, Hans-Reimer Rodewald, Richard A Flavell, Takashi Nagasawa, Koichi Ikuta, João Pedro Pereira
Hematopoietic stem cells (HSCs) self-renew in bone marrow niches formed by mesenchymal progenitors and endothelial cells expressing the chemokine CXCL12, but whether a separate niche instructs multipotent progenitor (MPP) differentiation remains unclear. We show that MPPs resided in HSC niches, where they encountered lineage-instructive differentiation signals. Conditional deletion of the chemokine receptor CXCR4 in MPPs reduced differentiation into common lymphoid progenitors (CLPs), which decreased lymphopoiesis...
November 23, 2016: Immunity
https://www.readbyqxmd.com/read/27912762/regulation-of-effector-function-of-cns-autoreactive-cd4-t-cells-through-inhibitory-receptors-and-il-7r%C3%AE
#2
Patrick K Nuro-Gyina, Elizabeth L Rieser, Marissa C Granitto, Wei Pei, Yue Liu, Priscilla W Lee, Saba Aqel, Jian Zhang, Amy E Lovett-Racke, Michael K Racke, Yuhong Yang
BACKGROUND: Multiple sclerosis (MS) is a chronic CNS autoimmune disease characterized by inflammation, demyelination, and neuronal degeneration, where myelin-specific CD4 T cells play critical roles in the formation of acute MS lesions and disease progression. The suppression of IL-7Rα expression and the upregulation of inhibitory receptors (PD-1, etc.) are essential parts of the cell-intrinsic immunosuppressive program regulating T effector functions to prevent autoimmunity. However, little is known on the factors regulating IL-7Rα/PD-1 balance in myelin-specific CD4 T effector/memory cells during the development of CNS autoimmunity...
December 3, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27911806/permissive-roles-of-cytokines-interleukin-7-and-flt3-ligand-in-mouse-b-cell-lineage-commitment
#3
Lilly von Muenchow, Llucia Alberti-Servera, Fabian Klein, Giuseppina Capoferri, Daniela Finke, Rhodri Ceredig, Antonius Rolink, Panagiotis Tsapogas
Hematopoietic cells are continuously generated throughout life from hematopoietic stem cells, thus making hematopoiesis a favorable system to study developmental cell lineage commitment. The main factors incorporating environmental signals to developing hematopoietic cells are cytokines, which regulate commitment of hematopoietic progenitors to the different blood lineages by acting either in an instructive or a permissive manner. Fms-like tyrosine kinase-3 (Flt3) ligand (FL) and Interleukin-7 (IL-7) are cytokines pivotal for B-cell development, as manifested by the severely compromised B-cell development in their absence...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27906425/the-correlation-between-children-s-status-asthmatics-and-interstitial-lung-disease
#4
X-M Han, Y-Y Cheng, Y-F Gong, M-M Jiang
OBJECTIVE: Investigating the correlation between children's status asthmatics and interstitial lung disease (ILD). PATIENTS AND METHODS: We continuously selected 20 cases of children's status asthmatics combined with ILD (group A), 20 cases of pure status asthmatics (group B), 20 cases of pure ILD (group C) and 20 cases of healthy children (group D). We measured Th1/Th2 by flow cytometry as well as the level of expression of hs-CRP, IL-7 cytokines (TSLP), monocyte chemoattractant protein-1 (MCP-1) and anti-Jo-1 antibody by ELISA method...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27904036/differential-regulation-of-lympho-myelopoiesis-by-stromal-cells-in-the-early-and-late-phases-in-balb-c-mice-repeatedly-exposed-to-lipopolysaccharide
#5
Isao Tsuboi, Tomonori Harada, Yoko Hirabayashi, Jun Kanno, Shin Aizawa
Chronic lipopolysaccharide (LPS) exposure to mice reduces the lymphoid compartment and skews the hematopoietic cell compartment toward myeloid-cells, which is considered to be a direct effect of LPS on hematopoietic stem cells. However, the effect of chronic LPS exposure on stromal-cells, which compose the hematopoietic microenvironment, has not been elucidated. Here, we investigated early- and late-phase effects of repeated LPS exposure on stromal-cells. During the early phase, when mice were treated with 5 or 25 µg LPS three times at weekly intervals, the numbers of myeloid-progenitor (colony forming unit-granulocyte macrophage (CFU-GM)) cells and B lymphoid-progenitor (CFU-preB) cells in the bone-marrow (BM) rapidly decreased after each treatment...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27899224/interleukin-7-and-15-maintain-pathogenic-memory-th17-cells-in-autoimmunity
#6
Yihe Chen, Sunil K Chauhan, Xuhua Tan, Reza Dana
Th17 cells are principal mediators of many autoimmune conditions. Recently, memory Th17 cells have been revealed as crucial in mediating the chronicity of various refractory autoimmune disorders; however, the underlying mechanisms maintaining memory Th17 cells have remained elusive. Here, using a preclinical model of ocular autoimmune disease we show that both IL-7 and IL-15 are critical for maintaining pathogenic memory Th17 cells. Neutralization of these cytokines leads to substantial reduction of memory Th17 cells; both IL-7 and IL-15 provide survival signals via activating STAT5, and IL-15 provides additional proliferation signals via activating both STAT5 and Akt...
November 26, 2016: Journal of Autoimmunity
https://www.readbyqxmd.com/read/27890459/relationship-of-systemic-cytokine-concentrations-to-cognitive-function-over-two-years-in-women-with-early-stage-breast-cancer
#7
Debra E Lyon, Ronald Cohen, Huaihou Chen, Debra L Kelly, Nancy L McCain, Angela Starkweather, Hyochol Ahn, Jamie Sturgill, Colleen K Jackson-Cook
: Cancer and its treatment are frequently associated with cancer-related cognitive impairment (CRCI). While CRCI has been associated with linked to chemotherapy, there is increasing evidence that the condition may start prior to treatment and for some, remain unresolved after active treatment and into survivorship. Although the pathophysiology of the condition is complex, alterations in systemic cytokines, signaling molecules activated in response to infection or injury that trigger inflammation, are a possible mechanism linked to cognitive dysfunction in breast cancer and other conditions...
November 13, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27878721/evaluation-in-vitro-of-immunoregulatory-cytokines-secretion-by-dendritic-cells-in-mountain-skiers
#8
V S Evstratova, D B Nikityuk, N A Riger, N V Fedyanina, R A Khanferyan
In vitro production of immunoregulatory cytokines (IFN-α, IL-31, TNF-β, IL-17A, IL-7, IL-1RA, IL-1α, IL-10, IL-15, IL-21, IL-22, IL-23, IL-27, and IL-9) by dendritic cell cultures was compared in ski athletes and healthy donors. Effect of prolonged intense physical exercise on secretory activity of immune cells was investigated. In both groups, secretion of IL-1RA, IL-10, IL-1α by dendritic cells was revealed, but there were significant differences in IL-1RA, IL-1α content (p<0.05) with lower level in the group of athletes...
November 23, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27873479/cytokine-and-chemokine-tear-levels-in-patients-with-uveitis
#9
Ester Carreño, Alejandro Portero, José M Herreras, Carmen García-Vázquez, Scott M Whitcup, Michael E Stern, Margarita Calonge, Amalia Enríquez-de-Salamanca
PURPOSE: To determine whether the levels of cytokines and chemokines in tears differ in uveitis patients and healthy subjects. METHODS: Ninety-two uveitis patients (mean age 46.4 years) and 157 control healthy subjects (mean age 49.5 years) were recruited. Subjects with ocular surface diseases such as dry eye were excluded from the study. Using multiplex bead-based assays, tears (4 μl) were analysed for the concentration of interleukin (IL)-1β, IL-1RA, IL-2, IL-6, IL-7, IL-8/CXCL8, IL-10, IL-12p70, IL-15, IL-17A, IL-23, epidermal growth factor (EGF), fractalkine/CX3CL1, interferon-γ, IP-10/CXCL10, monocyte chemo-attractant protein (MCP)-1/CCL2, tumour necrosis factor-α, vascular endothelial growth factor (VEGF), transforming growth factor (TGF)-β1, TGF-β2 and TGF-β3...
November 22, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27866242/elevated-systemic-interleukin-7-in-patients-with-colorectal-cancer-and-individuals-at-high-risk-of-cancer-association-with-lymph-node-involvement-and-tumor-location-in-the-right-colon
#10
Malgorzata Krzystek-Korpacka, Marek Zawadzki, Katarzyna Neubauer, Iwona Bednarz-Misa, Sabina Górska, Jerzy Wiśniewski, Wojciech Witkiewicz, Andrzej Gamian
Interleukin (IL)-7 is a cytokine essential for protective immunity, and it is considered as a promising agent for cancer immunotherapy. Recent studies, however, appear to associate IL-7 with aggressiveness of solid tumors. The IL-7 has been less studied in colorectal cancer (CRC) and conditions associated with increased risk of CRC development. To explore IL-7 status in bowel diseases, it was measured immunofluorometrically in 431 individuals (110 with CRC) by using Luminex platform. A level of IL-7 in CRC patients was significantly higher than in controls, did not differ from those with adenomas, but was lower than in both active and inactive inflammatory bowel disease (IBD) cases...
November 19, 2016: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/27863540/comparison-of-serum-cytokine-levels-between-dogs-with-multicentric-lymphoma-and-healthy-dogs
#11
Jerome Calvalido, Geoffrey A Wood, Anthony J Mutsaers, Darren Wood, William Sears, J Paul Woods
In humans, multiple cytokines have been linked to the development of lymphoma, and are relevant biomarkers for response to chemotherapy and prognosis. In contrast, only a few circulating cytokines have been studied in dogs with lymphoma. We prospectively enrolled thirty-one dogs newly diagnosed with multicentric lymphoma. Immunophenotype was determined by flow cytometry in all dogs, separating them into 2 subgroups: B cell lymphoma (n=21) and T cell lymphoma (n=10). Nineteen healthy dogs were enrolled in the control group...
December 2016: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/27861815/intestinal-helminth-infection-induces-highly-functional-resident-memory-cd4-t-cells-in-mice
#12
Svenja Steinfelder, Sebastian Rausch, Dörte Michael, Anja A Kühl, Susanne Hartmann
Immunity to intestinal nematodes requires CD4⁺ Th2-cell responses, including IL-4 and IL-13 production. Chronic infection with intestinal nematodes leads to downregulation of these responses, and few functional T helper (Th) 2 cells are detected in secondary lymphoid organs in the chronic phase or after abrogation of infection. Here, we show with a natural murine infection with Heligmosomoides polygyrus that highly functional memory Th2 cells persist in the lamina propria and in addition in the peritoneal cavity (PC) after abrogation of infection...
November 10, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27855183/interleukins-7-and-15-maintain-human-t-cell-proliferative-capacity-through-stat5-signaling
#13
Adam Drake, Mandeep Kaur, Bettina P Iliopoulou, Ryan Phennicie, Amanda Hanson, Jianzhu Chen
T lymphocytes require signals from self-peptides and cytokines, most notably interleukins 7 and 15 (IL-7, IL-15), for survival. While mouse T cells die rapidly if IL-7 or IL-15 is withdrawn, human T cells can survive prolonged withdrawal of IL-7 and IL-15. Here we show that IL-7 and IL-15 are required to maintain human T cell proliferative capacity through the STAT5 signaling pathway. T cells from humanized mice proliferate better if stimulated in the presence of human IL-7 or IL-15 or if T cells are exposed to human IL-7 or IL-15 in mice...
2016: PloS One
https://www.readbyqxmd.com/read/27844107/th9-cells-in-the-pathogenesis-of-eae-and-multiple-sclerosis
#14
REVIEW
Wassim Elyaman, Samia J Khoury
Interleukin (IL)-9 producing CD4(+) T helper cells (Th9) are the newest addition to the T helper cell subsets. IL-9 binds to a heterodimeric receptor consisting of the IL-9 receptor (IL-9R) and a common γ chain also presents in IL-2, IL-4, IL-7, and IL-15 receptor complexes. In addition to Th9 cells, Th17 cells secrete smaller amounts of IL-9. Many functional and regulatory roles associated with Th9 cells are currently not fully understood. IL-9 is a pleiotropic cytokine that affects the activity of multiple cell types in the immune compartment as well as in the central nervous system (CNS)...
November 14, 2016: Seminars in Immunopathology
https://www.readbyqxmd.com/read/27843891/establishment-and-maintenance-of-the-human-na%C3%A3-ve-cd4-t-cell-compartment
#15
REVIEW
Susana L Silva, Ana E Sousa
The naïve CD4(+) T-cell compartment is considered essential to guarantee immune competence throughout life. Its replenishment with naïve cells with broad diverse receptor repertoire, albeit with reduced self-reactivity, is ensured by the thymus. Nevertheless, cumulative data support a major requirement of post-thymic proliferation both for the establishment of the human peripheral naïve compartment during the accelerated somatic growth of childhood, as well as for its lifelong maintenance. Additionally, a dynamic equilibrium is operating at the cell level to fine-tune the T-cell receptor threshold to activation and survival cues, in order to counteract the continuous naïve cell loss by death or conversion into memory/effector cells...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27836178/blood-csf-barrier-and-compartmentalization-of-cns-cellular-immune-response-in-hiv-infection
#16
Sérgio M de Almeida, Indianara Rotta, Clea E Ribeiro, Davey Smith, Ruiyi Wang, Jennifer Judicello, Michael Potter, Florin Vaida, Scott Letendre, Ronald J Ellis
HIV infection is persistent in the CNS, to evaluate the compartmentalization of the CNS immune response to HIV, we compared soluble markers of cellular immunity in the blood and CSF among HIV- (n=19) and HIV+ (n=68), as well as among HIV participants with or without CSF pleocytosis. Dysfunction of the blood cerebrospinal fluid barrier (BCSFB) was common in HIV participants. CSF levels of TNFα, IFNγ, IL-2, IL-6, IL-7, IL-10, IP-10, MIP-1α, MIP-1β, and RANTES were significantly higher in participants with CSF pleocytosis (P<0...
November 3, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27833171/serum-levels-of-soluble-adhesion-molecules-in-newly-diagnosed-acute-myeloid-leukemia-and-in-complete-remission-suggest-endothelial-cell-activation-by-myeloblasts
#17
Tomas Kupsa, Jan Vanek, Zak Pavel, Ladislav Jebavy, Jan M Horacek
BACKGROUND AND AIMS: Despite high-dose multi-agent chemotherapy and allogeneic stem cell transplantation, the relapse rate of acute myeloid leukemia (AML) is high. Further, the disease is highly resistent to drugs. We speculated that deeper understanding of AML-endothelial cell interactions might provide new targets for selective modulation of the AML microenvironment and form the basis for novel treatment approaches. In this study, we evaluated levels of endothelium derived soluble adhesion molecules in active disease and in complete remission (CR) and their relationship with inflammatory cytokines...
November 10, 2016: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/27833166/soluble-%C3%AE-c-cytokine-receptor-suppresses-il-15-signaling-and-impairs-inkt-cell-development-in-the-thymus
#18
Joo-Young Park, Yuna Jo, Eunhee Ko, Megan A Luckey, Yoo Kyoung Park, Se-Ho Park, Jung-Hyun Park, Changwan Hong
The soluble γc protein (sγc) is a naturally occurring splice isoform of the γc cytokine receptor that is produced by activated T cells and inhibits γc cytokine signaling. Here we show that sγc expression is also highly upregulated in immature CD4(+)CD8(+) thymocytes but then downregulated in mature thymocytes. These results indicate a developmentally controlled mechanism for sγc expression and suggest a potential role for sγc in regulating T cell development in the thymus. Indeed, sγc overexpression resulted in significantly reduced thymocyte numbers and diminished expansion of immature thymocytes, concordant to its role in suppressing signaling by IL-7, a critical γc cytokine in early thymopoiesis...
November 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27830278/molecular-communication-from-skeletal-muscle-to-bone-a-review-for-muscle-derived-myokines-regulating-bone-metabolism
#19
REVIEW
Baosheng Guo, Zong-Kang Zhang, Chao Liang, Jie Li, Jin Liu, Aiping Lu, Bao-Ting Zhang, Ge Zhang
Besides the mechanical loading-dependent paradigm, skeletal muscle also serves as an endocrine organ capable of secreting cytokines to modulate bone metabolism. In this review, we focused on reviewing the myokines involved in communication from skeletal muscle to bone, i.e. (1) myostatin and myostatin-binding proteins including follistatin and decorin, (2) interleukins including interleukin-6 (IL-6), interleukin-7 (IL-7) and interleukin-15 (IL-15), (3) insulin-like growth factor 1 (IGF-1) and its binding proteins, (4) other myokines including PGC-1α-irisin system and osteoglycin (OGN)...
November 9, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27828992/relationship-between-irisin-concentration-and-serum-cytokines-in-mother-and-newborn
#20
Maria Hernandez-Trejo, Gerardo Garcia-Rivas, Alejandro Torres-Quintanilla, Estibalitz Laresgoiti-Servitje
INTRODUCTION: Irisin is considered to be a myokine and adipokine that may also participate in reproductive functions, as it increases significantly throughout pregnancy. However, the regulation of circulating irisin and its relationship with other cytokines has not been assessed thus far in pregnant women and their offspring. OBJECTIVE: The aim of this study was to evaluate differences in irisin and cytokine concentrations between women at the end of pregnancy and their offspring, as well as the relationship between maternal and newborn irisin and maternal and newborn biomarkers...
2016: PloS One
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