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https://www.readbyqxmd.com/read/29470597/mucosa-associated-invariant-t-cells-in-malignancies-a-faithful-friend-or-formidable-foe
#1
REVIEW
S M Mansour Haeryfar, Christopher R Shaler, Patrick T Rudak
Mucosa-associated invariant T (MAIT) cells are a subset of innate-like T lymphocytes known for their ability to respond to MHC-related protein 1 (MR1)-restricted stimuli and select cytokine signals. They are abundant in humans and especially enriched in mucosal layers, common sites of neoplastic transformation. MAIT cells have been found within primary and metastatic tumors. However, whether they promote malignancy or contribute to anticancer immunity is unclear. On the one hand, MAIT cells produce IL-17A in certain locations and under certain circumstances, which could in turn facilitate neoangiogenesis, intratumoral accumulation of immunosuppressive cell populations, and cancer progression...
February 22, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29469956/ifn-%C3%AE-orchestrates-tumor-elimination-tumor-dormancy-tumor-escape-and-progression
#2
REVIEW
Hussein F Aqbi, Matthew Wallace, Samay Sappal, Kyle K Payne, Masoud H Manjili
Tumor immunoediting consisting of three phases of elimination, equilibrium or dormancy, and escape has been supported by preclinical and clinical data. A comprehensive understanding of the molecular mechanisms by which antitumor immune responses regulate these three phases are important for developing highly tailored immunotherapeutics that can control cancer. To this end, IFN-γ produced by Th1 cells, cytotoxic T cells, NK cells, and NKT cells is a pleiotropic cytokine that is involved in all three phases of tumor immunoediting, as well as during inflammation-mediated tumorigenesis processes...
February 22, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29467927/kanglaite-inhibits-emt-caused-by-tnf-%C3%AE-via-nf-%C3%AE%C2%BA%C3%AE-inhibition-in-colorectal-cancer-cells
#3
Guiling Shi, Xiaoli Zheng, Shiwu Zhang, Xiaojing Wu, Fei Yu, Yijia Wang, Fei Xing
Tumor necrosis factor-alpha is a critical pro-inflammatory cytokine produced by macrophages and was once considered an anti-tumor agent. However, a low dose of tumor necrosis factor-alpha can cause epithelial mesenchymal transition, angiogenesis and metastasis. NF-κΒ contributes to epithelial mesenchymal transition induced by tumor necrosis factor-alpha. Kanglaite, an extract from the Coix lacryma-jobi (adlay) seed, is an NF-κΒ inhibitor. The aim of this study was to investigate whether Kanglaite could inhibit epithelial mesenchymal transition caused by tumor necrosis factor-alpha using four colorectal cancer cell lines, HCT106, HCT116, LoVo and CT26...
January 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29467762/inositol-requiring-enzyme-1-mediated-downregulation-of-microrna-mir-146a-and-mir-155-in-primary-dermal-fibroblasts-across-three-tnfrsf1a-mutations-results-in-hyperresponsiveness-to-lipopolysaccharide
#4
Stephanie R Harrison, Thomas Scambler, Lylia Oubussad, Chi Wong, Miriam Wittmann, Michael F McDermott, Sinisa Savic
Tumor necrosis factor (TNF)-receptor-associated periodic fever syndrome (TRAPS) is a rare monogenic autoinflammatory disorder characterized by mutations in the TNFRSF1A gene, causing TNF-receptor 1 (TNFR1) misfolding, increased cellular stress, activation of the unfolded protein response (UPR), and hyperresponsiveness to lipopolysaccharide (LPS). Both microRNA (miR)-146a and miR-155 provide negative feedback for LPS-toll-like receptor 2/4 signaling and cytokine production, through regulation of nuclear factor kappa B (NF-κB)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29466685/prolactin-regulates-liver-growth-during-postnatal-development-in-mice
#5
Bibiana Moreno-Carranza, Marco Bravo-Manríquez, Arelí Baez, María G Ledesma-Colunga, Xarubet Ruiz-Herrera, Pamela Reyes-Ortega, Ericka A De Los Ríos, Yazmín Macotela, Gonzalo Martínez de la Escalera, Carmen Clapp
The liver grows during the early postnatal period first at slower and then at faster rates than the body to achieve the adult liver-to-body weight ratio (LBW), a constant reflecting liver health. The hormone prolactin (PRL) stimulates adult liver growth and regeneration and its levels are high in the circulation of newborn infants, but whether PRL plays a role on neonatal liver growth is unknown. Here, we show that the liver produces PRL and upregulates the PRL receptor in mice during the first 2 weeks after birth, when liver growth lags behind body growth...
February 21, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29463209/characterisation-of-zika-virus-infection-in-primary-human-astrocytes
#6
Michal Stefanik, Petra Formanova, Tomas Bily, Marie Vancova, Ludek Eyer, Martin Palus, Jiri Salat, Carla Torres Braconi, Paolo M de A Zanotto, Ernest A Gould, Daniel Ruzek
BACKGROUND: The recent Zika virus (ZIKV) outbreak has linked ZIKV with microcephaly and other central nervous system pathologies in humans. Astrocytes are among the first cells to respond to ZIKV infection in the brain and are also targets for virus infection. In this study, we investigated the interaction between ZIKV and primary human brain cortical astrocytes (HBCA). RESULTS: HBCAs were highly sensitive to representatives of both Asian and African ZIKV lineages and produced high viral yields...
February 20, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29462985/melatonin-regulates-the-synthesis-of-steroid-hormones-on-male-reproduction-a-review
#7
REVIEW
Kun Yu, Shou-Long Deng, Tie-Cheng Sun, Yuan-Yuan Li, Yi-Xun Liu
Melatonin is a ubiquitous molecule and exhibits different effects in long-day and short-day breeding animals. Testosterone, the main resource of androgens in the testis, is produced by Leydig cells but regulated mainly by cytokine secreted by Sertoli cells. Melatonin acts as a local modulator of the endocrine activity in Leydig cells. In Sertoli cells, melatonin influences cellular proliferation and energy metabolism and, consequently, can regulate steroidogenesis. These suggest melatonin as a key player in the regulation of steroidogenesis...
February 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29462879/chondrocytes-contribute-to-alphaviral-disease-pathogenesis-as-a-source-of-virus-replication-and-soluble-factor-production
#8
Elisa X Y Lim, Aroon Supramaniam, Hayman Lui, Peta Coles, Wai Suet Lee, Xiang Liu, Penny A Rudd, Lara J Herrero
Arthritogenic alphavirus infections often result in debilitating musculoskeletal disorders that affect the joints, muscle, and bone. In order to evaluate the infection profile of primary human skeletal muscle and chondrocyte cells to Ross River virus (RRV) in vitro, cells were infected at a multiplicity of infection (MOI) of 1 over a period of two days. Viral titers were determined by plaque assay and cytokine expression by Bio-Plex® assays using the supernatants harvested. Gene expression studies were conducted using total RNA isolated from cells...
February 15, 2018: Viruses
https://www.readbyqxmd.com/read/29462806/hgf-and-bfgf-secretion-by-human-adipose-derived-stem-cells-improves-ovarian-function-during-natural-aging-via-activation-of-the-sirt1-foxo1-signaling-pathway
#9
Chenyue Ding, Qinyan Zou, Fuxin Wang, Huihua Wu, Wei Wang, Hong Li, Boxian Huang
BACKGROUND/AIMS: Human adipose-derived stem cells (hADSCs) are a potential therapeutic option for clinical applications because of their ability to produce cytokines and their capacity for trilineage differentiation. To date, few researchers have investigated the effects of hADSCs on natural ovarian aging (NOA). METHODS: An NOA mouse model and human ovarian granule cells (hGCs) collected from individuals with NOA were prepared to assess the therapeutic effects and illuminate the mechanism of hADSCs in curing NOA...
February 15, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29461976/mycobacterial-growth-inhibition-is-associated-with-trained-innate-immunity
#10
Simone A Joosten, Krista E van Meijgaarden, Sandra M Arend, Corine Prins, Fredrik Oftung, Gro Ellen Korsvold, Sandra V Kik, Rob Jw Arts, Reinout van Crevel, Mihai G Netea, Tom Hm Ottenhoff
The lack of defined correlates of protection hampers development of vaccines against tuberculosis (TB). In vitro mycobacterial outgrowth assays are thought to better capture the complexity of the human host/Mycobacterium tuberculosis (Mtb) interaction. We used a PBMC-based "mycobacterial-growth-inhibition-assay" (MGIA) to investigate the capacity to control outgrowth of Bacille Calmette-Guérin (BCG). Interestingly, strong control of BCG outgrowth was observed almost exclusively in individuals with recent exposure to Mtb, but not in (long-term) latent TB infection, and only modestly in BCG vaccinees...
February 20, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29460861/immunogenicity-of-ompa-and-ompb-antigens-from-rickettsia-rickettsii-on-mononuclear-cells-from-rickettsia-positive-mexican-patients
#11
Dzul-Rosado Karla, Balam-Romero Javier, Valencia-Pacheco Guillermo, Lugo-Caballero Cesar, Arias-Leon Juan Jose, Peniche-Lara Gaspar, Zavala-Castro Jorge
Background & objectives: The nature of the rickettsial antigens and the immune response generated by them, have been the subject of exhaustive research so that a suitable vaccine can be developed. Till date evaluations of Rickettsia rickettsii antigens that induce both humoral and cellular responses in animal models have only shown partial protection and short-term immunological memory. This study was aimed to evaluate the immune response induced by DNA plasmids generated from the OmpA and OmpB genes of R...
October 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29459675/c-jun-n-terminal-kinase-1-defective-cd4-cd25-foxp3-cells-prolong-islet-allograft-survival-in-diabetic-mice
#12
Deepak Tripathi, Satyanarayana S Cheekatla, Padmaja Paidipally, Rajesh Kumar Radhakrishnan, Elwyn Welch, Ramya Sivangala Thandi, Amy R Tvinnereim, Ramakrishna Vankayalapati
CD4+CD25+FoxP3+ cells (Tregs) inhibit inflammatory immune responses to allografts. Here, we found that co-transplantation of allogeneic pancreatic islets with Tregs that are defective in c-Jun N-terminal kinase 1 (JNK1) signaling prolongs islet allograft survival in the liver parenchyma of chemically induced diabetic mice (CDM). Adoptively transferred JNK1-/- but not wild-type (WT) Tregs survive longer in the liver parenchyma of CDM. JNK1-/- Tregs are resistant to apoptosis and express anti-apoptotic molecules...
February 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29458169/inhibition-of-microsomal-prostaglandin-e-synthase-1-facilitates-liver-repair-after-hepatic-injury-in-mice
#13
Nobuyuki Nishizawa, Yoshiya Ito, Koji Eshima, Hirotoki Ohkubo, Ken Kojo, Tomoyoshi Inoue, Joan Raouf, Per-Johan Jakobsson, Satoshi Uematsu, Shizuo Akira, Shuh Narumiya, Masahiko Watanabe, Masataka Majima
BACKGROUND & AIMS: Liver repair following hepatic ischemia/reperfusion (I/R) injury is crucial to survival. This study aims to examine the role of endogenous prostaglandin E2 (PGE2 ) produced by inducible microsomal PGE synthase-1 (mPGES-1), a terminal enzyme of PGE2 generation, in liver injury and repair following hepatic I/R. METHODS: mPGES-1 deficient (mPGES-1-/- ) mice or their wild counterparts (WT) were subjected to partial hepatic ischemia followed by reperfusion...
February 16, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29457218/regulatory-t-cells-are-required-for-normal-and-activin-promoted-wound-repair-in-mice
#14
Eric Haertel, Natasha Joshi, Paul Hiebert, Manfred Kopf, Sabine Werner
Healing of skin wounds is orchestrated by various types of immune cells, but little is known about the role of FoxP3+ regulatory T cells (Tregs) in this process. Here we determined if Tregs are important for wound healing in normal mice and if they contribute to the accelerated healing of mice overexpressing the growth and differentiation factor activin. Diphtheria-toxin induced Treg depletion prior to injury caused impaired healing characterized by delayed re-epithelialization, reduced wound contraction and impaired vessel maturation...
February 19, 2018: European Journal of Immunology
https://www.readbyqxmd.com/read/29454797/alterations-in-intestinal-microbiota-lead-to-production-of-interleukin-17-by-intrahepatic-%C3%AE-%C3%AE-t-cell-receptor-positive-cells-and-pathogenesis-of-cholestatic-liver-disease
#15
Dana Tedesco, Manoj Thapa, Chui-Yoke Chin, Yong Ge, Minghao Gong, Jing Li, Sanjeev Gumber, Patrick Speck, Elizabeth J Elrod, Eileen M Burd, William H Kitchens, Joseph F Magliocca, Andrew B Adams, David S Weiss, Mansour Mohamadzadeh, Arash Grakoui
BACKGROUND & AIMS: Variants at the ATP binding cassette subfamily B member 4 gene (ABCB4 or MDR2) locus, which encodes a biliary transport protein, are associated with a spectrum of cholestatic liver diseases. Exacerbation of liver disease has been linked to increased hepatic levels of interleukin 17 (IL17), yet the mechanisms of this increase are not understood. We studied mice with disruption of Mdr2 to determine how defects in liver and alteration in the microbiota contribute to production of IL17 by intrahepatic γδ T cells...
February 15, 2018: Gastroenterology
https://www.readbyqxmd.com/read/29454785/lymphoid-tissue-inducer-a-divergent-member-of-the-ilc-family
#16
REVIEW
Chao Zhong, Mingzhu Zheng, Jinfang Zhu
Innate lymphoid cells (ILCs) that are capable of producing effector cytokines reminiscent of CD4+ T helper (Th) cells during infections and tissue inflammations have drawn much attention in the immunology field in recent years. Within the ILCs, the lymphoid tissue inducer (LTi) cells that play a critical role in lymphoid organogenesis were identified long before the establishment of the ILC concept. LTi cells, developed and functioning mainly at the fetal stage, and LTi-like cells, presumably generated during the adulthood, are regarded as a subset of type 3 ILCs (ILC3s) because they express the ILC3 lineage-defining transcription factor RORγt, and like other ILC3s, can produce an ILC3 signature cytokine IL-22 and initiate protective immune responses against extracellular bacteria...
February 13, 2018: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/29454753/protein-s-exacerbates-chronic-liver-injury-and-fibrosis
#17
Toshiaki Totoki, Corina N D' Alessandro-Gabazza, Masaaki Toda, Prince Baffour Tonto, Atsuro Takeshita, Taro Yasuma, Kota Nishihama, Motoh Iwasa, Noriyuki Horiki, Yoshiyuki Takei, Esteban C Gabazza
Protein S is a vitamin K-dependent glycoprotein produced mainly in the liver with anticoagulant, anti-inflammatory, immune-modulatory, and anti-apoptotic properties. Protein S exacerbates acute liver injury by prolonging the survival of liver immune cells. However, the effect of protein S on chronic liver injury and fibrosis is unknown. Here we investigated whether human protein S can affect chronic liver injury and fibrosis. Liver injury/fibrosis was induced by carbon tetrachloride injection in mice overexpressing human protein S and in wild-type mice...
February 15, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29454161/physiological-low-dose-oestrogen-promotes-the-development-of-experimental-autoimmune-thyroiditis-through-the-up-regulation-of-th1-th17-responses
#18
Yang Xiang, Qian Jin, Li Li, Yali Yang, Hongmei Zhang, Miao Liu, Chenling Fan, Jing Li, Zhongyan Shan, Weiping Teng
Previous studies have reported a preponderance of autoimmune thyroiditis (AIT) in females, but the detailed mechanisms have not been elucidated. In this study, we explored the effects of oestrogen on experimental AIT (EAT) and its potential mechanisms in an ovariectomised mouse model through the supplementation of high (equivalent to the level during pregnancy) or low (equivalent to the level at the oestrus stage) doses of oestradiol (E2). We found that EAT incidence, the intrathyroidal inflammatory score, serum anti-thyroglobulin IgG2b levels, splenic mRNA expression of Th1- and Th17-specific transcription factors and typical cytokines and the proportion of IL-12-producing dendritic cells were significantly increased in EAT mice treated with low-dose E2 compared with those in the control group...
February 7, 2018: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29454004/identification-and-analysis-of-peanut-specific-t-effector-and-t-regulatory-cells-in-children-allergic-and-tolerant-to-peanut
#19
Katherine A Weissler, Marjohn Rasooly, Tom DiMaggio, Hyejeong Bolan, Daly Cantave, David Martino, Melanie R Neeland, Mimi Lk Tang, Thanh D Dang, Katrina J Allen, Pamela A Frischmeyer-Guerrerio
BACKGROUND: Peanut allergy is potentially life-threatening and generally persists lifelong. Recent data suggests the skin may be an important route of initial sensitization to peanut, while early oral exposure to peanut is protective. In mice, T regulatory cells (Tregs) are central to development of tolerance to food, but their contribution to the pathogenesis of food allergy in humans is less clear. OBJECTIVE: We sought to quantify and phenotype peanut-specific CD4+ T effector (ps-Teff) and ps-Tregs in children with and without peanut allergy or sensitization...
February 14, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29453985/zika-virus-infected-primary-microglia-impairs-npcs-proliferation-and-differentiation
#20
Jin Wang, Jing Liu, Rui Zhou, Xin Ding, Qipeng Zhang, Chenyu Zhang, Liang Li
Zika virus (ZIKV) can lead to severe birth defects especially microcephaly in newborns by infecting human neural progenitors and impairing brain development. However, as the resident immune cells in the brain, the role of microglia in the ZIKV pathology is not clearly defined. To understand the interplay between immune response and neural cells, we investigate the interaction between microglia and NPCs during ZIKV infection. Our results demonstrate that primary microglia infected with ZIKV induces an inflammatory response similar to that in human, producing high level of tumor necrosis factor alpha (TNF-α), interleukin 6 (IL-6), interleukin 1β (IL-1β) and inducible nitric oxide synthase (iNOS)...
February 14, 2018: Biochemical and Biophysical Research Communications
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