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https://www.readbyqxmd.com/read/29793054/bacillus-clausii-inhibits-bone-loss-by-skewing-treg-th17-cell-equilibrium-in-postmenopausal-osteoporotic-mice-model
#1
Hamid Y Dar, Subhashis Pal, Prashant Shukla, Pradyumna K Mishra, Geetanjali B Tomar, Naibedya Chattopadhyay, Rupesh K Srivastava
OBJECTIVES: Postmenopausal osteoporosis is one of most commonly occurring skeletal diseases leading to bone loss and fragility. Probiotics have been associated with various immunomodulatory properties and thus can be exploited to enhance bone health. In the present study, we report, to our knowledge for the first time, that oral administration of Bacillus clausii (BC) in postmenopausal osteoporotic (OVX) mice model enhances bone health. METHODS: BC was selected as probiotic of choice due to its established immunomodulatory properties...
March 20, 2018: Nutrition
https://www.readbyqxmd.com/read/29792851/collagen-induced-arthritis-in-dark-agouti-rats-as-a-model-for-study-of-immunological-sexual-dimorphisms-in-the-human-disease
#2
Mirjana Dimitrijević, Nevena Arsenović-Ranin, Biljana Bufan, Mirjana Nacka-Aleksić, Mirjana Lazarević Macanović, Petar Milovanović, Marija Đurić, Jelena Sopta, Gordana Leposavić
Collagen-induced arthritis (CIA) is a frequently used animal model of rheumatoid arthritis, human autoimmune disease that exhibits clear sex bias in incidence and clinical course. Female Dark Agouti rats immunized for CIA showed also greater incidence and higher arthritic score than their male counterparts. The study investigated sex differences in mechanisms controlling the primary immune responses in draining lymph nodes (dLNs), as a factor contributing to this dimorphism. The higher frequencies of CD4 + CD25 + Foxp3- cells, presumably activated effector T (Teff) cells, and IL-17+, IFN-γ + and IL-17 + IFN-γ + T cells were found in female comapared with male rat dLNs...
May 21, 2018: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/29790701/the-clinical-importance-of-changes-in-treg-and-th17-lymphocyte-subsets-in-splenectomized-patients-after-spleen-injury
#3
Witold Zgodziński, Ewelina Grywalska, Dorota Siwicka-Gieroba, Agata Surdacka, Krzysztof Zinkiewicz, Dariusz Szczepanek, Grzegorz Wallner, Jacek Roliński
BACKGROUND: Splenectomized patients are more prone to bacterial infections due to their immunocompromised status. Little is known about the role of T helper 17 (Th17) and T regulatory cells (Treg) in the immune system of patients after the removal of the spleen. OBJECTIVES: The aim of the present study was to analyze possible changes in CD4+ lymphocyte T subsets, especially Treg and Th17, in patients who had undergone splenectomy. MATERIAL AND METHODS: The study included a group of 67 male patients (41...
May 22, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29788098/helicobacter-pylori-colonization-protects-against-chronic-experimental-colitis-by-regulating-th17-treg-balance
#4
Hongchen Zhang, Yun Dai, Yun Liu, Ting Wu, Jing Li, Xiaolei Wang, Weihong Wang
Background: Epidemiological studies have demonstrated an inverse association between Helicobacter pylori infection and the risk of developing inflammatory bowel disease (IBD). The mechanisms by which H. pylori infection protects against IBD are unclear. Here, we explored the possible protective effects and mechanisms of gastric H. pylori colonization on a chronic colitis model, with focus on whether H. pylori exerted its effects through regulating Th17/Treg immune responses. Methods: Chronic colitis was induced by dextran sulfate sodium (DSS) treatment...
May 17, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29788053/reversing-ongoing-chronic-intestinal-inflammation-and-fibrosis-by-sustained-block-of-il-12-and-il-23-using-a-vaccine-in-mice
#5
Qingdong Guan, Carolyn R Weiss, Shuhe Wang, Gefei Qing, Xi Yang, Richard J Warrington, Charles N Bernstein, Zhikang Peng
Interleukin (IL)-12 and IL-23 that share subunit p40 are important cytokines in the pathogenesis of inflammatory bowel disease. We reported that mouse p40 peptide-based vaccines ameliorated intestinal inflammation in the prevention of trinitrobenzene sulfonic acid (TNBS)-induced murine colitis model. Here, we evaluated whether administration of the vaccine after establishment of colitis would be effective in modifying both TNBS-induced and dextran sulfate sodium (DSS)-induced chronic colitis and the underlying immune mechanisms...
May 17, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29775896/dysregulated-network-of-mirnas-involved-in-the-pathogenesis-of-multiple-sclerosis
#6
REVIEW
Sanam Dolati, Faroogh Marofi, Zohreh Babaloo, Leili Aghebati-Maleki, Leila Roshangar, Majid Ahmadi, Reza Rikhtegar, Mehdi Yousefi
Multiple sclerosis (MS) is a chronic and organ-specific autoimmune disease in which immune cells act against the myelin sheath, resulting in central nervous system (CNS) damage. It has been revealed that miRNAs can play significant role in the pathogenesis of MS. These regulatory molecules lead to the activation of different signaling pathways, regulation of several transcriptional factors, influencing the differentiation of Th17 cells, development of Tregs and alteration from Th2 to Th1 response in MS. New studies have discovered that dysregulation of miRNAs may trigger abnormal immune responses leading consequently in the emergence of autoimmunity...
May 15, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29774027/clinical-remission-of-sight-threatening-non-infectious-uveitis-is-characterized-by-an-upregulation-of-peripheral-t-regulatory-cell-polarized-towards-t-bet-and-tigit
#7
Rose M Gilbert, Xiaozhe Zhang, Robert D Sampson, Michael R Ehrenstein, Dao X Nguyen, Mahid Chaudhry, Charles Mein, Nadiya Mahmud, Grazyna Galatowicz, Oren Tomkins-Netzer, Virginia L Calder, Sue Lightman
Background: Non-infectious uveitis can cause chronic relapsing and remitting ocular inflammation, which may require high dose systemic immunosuppression to prevent severe sight loss. It has been classically described as an autoimmune disease, mediated by pro-inflammatory Th1 and Th17 T-cell subsets. Studies suggest that natural immunosuppressive CD4+ CD25+ FoxP3+ T-regulatory cells (Tregs) are involved in resolution of inflammation and may be involved in the maintenance of clinical remission...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29773345/t-cells-and-their-immunometabolism-a-novel-way-to-understanding-sepsis-immunopathogenesis-and-future-therapeutics
#8
REVIEW
V Kumar
Sepsis has always been considered as a big challenge for pharmaceutical companies in terms of discovering and designing new therapeutics. The pathogenesis of sepsis involves aberrant activation of innate immune cells (i.e. macrophages, neutrophils etc.) at early stages. However, a stage of immunosuppression is also observed during sepsis even in the patients who have recovered from it. This stage of immunosuppression is observed due to the loss of conventional (i.e. CD4+ , CD8+ ) T cells, Th17 cells and an upregulation of regulatory T cells (Tregs)...
May 5, 2018: European Journal of Cell Biology
https://www.readbyqxmd.com/read/29768397/lipopolysaccharide-exposure-alleviates-asthma-in-mice-by-regulating-th1-th2-and-treg-th17-balance
#9
Fengxia Ding, Zhou Fu, Bo Liu
BACKGROUND It is generally believed that endotoxin exposure exacerbates risk of developing asthmatic symptoms. However, recent studies have indicated that prior bacterial exposure may prevent future symptoms of asthma. Here, we evaluated the influence of pre-exposure to different concentrations of lipopolysaccharide (LPS) to subsequent ovalbumin (OVA) allergen sensitization and challenge. MATERIAL AND METHODS Four-week-old Balb/c mice were treated intranasally with varying concentrations of LPS (1 ug, 10 ug, and 100 ug) or sterile PBS for 10 days, then 2 weeks later they were exposed to OVA...
May 16, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29768353/correlation-of-increased-th17-treg-cell-ratio-with-endoplasmic-reticulum-stress-in-chronic-kidney-disease
#10
Xiaojing Zhu, Shuiqin Li, Qiaona Zhang, Dan Zhu, Yang Xu, Pengqian Zhang, Jin Han, Zhaoyang Duan, Jie Gao, Yan Ou
To investigate the relationship between the regulatory immune network and endoplasmic reticulum stress (ERS) in patients with different stages of chronic kidney disease (CKD).A total of 91 patients diagnosed with CKD were divided into different groups according to the stage of disease and treatment with hemodialysis (HD) or peritoneal dialysis (PD). Routine blood and biochemical tests were performed in patients in the different CKD groups and in healthy controls (n = 20). The frequencies of T helper type 17 (Th17) and regulatory T (Treg) cells in the overall T cell population were measured by flow cytometric analysis...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29766004/oral-administration-of-zataria-multiflora-extract-decreases-il-17-expression-in-perennial-allergic-rhinitis
#11
Nazila Ariaee, Jalal Ghorbani, Maryam Panahi, Mojgan Mohamadi, Javad Asili, Alireza Ranjbar, Reza Farid Hoseini, Farahzad Jabbari
Background: Rhinitis, which occurs most commonly as allergic rhinitis and affects 20% of the world's population, is a major health care burden causing significant morbidity. Considering the high prevalence of allergic rhinitis and anti-inflammatory effects of thyme, a favorite condiment, we performed a randomized clinical trial to determine whether thyme can relieve allergic rhinitis symptoms and affect the expression of TH17- and T-regulatory cell- (Treg) related cytokines IL-17, TGF-β, FOXP3, and IL-10...
April 2018: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29760692/il17-il17ra-as-a-novel-signaling-axis-driving-mesenchymal-stem-cell-therapeutic-function-in-experimental-autoimmune-encephalomyelitis
#12
Mónica Kurte, Patricia Luz-Crawford, Ana María Vega-Letter, Rafael A Contreras, Gautier Tejedor, Roberto Elizondo-Vega, Luna Martinez-Viola, Catalina Fernández-O'Ryan, Fernando E Figueroa, Christian Jorgensen, Farida Djouad, Flavio Carrión
The therapeutic effect of mesenchymal stem cells (MSCs) in multiple sclerosis (MS) and the experimental autoimmune encephalomyelitis (EAE) model has been well described. This effect is, in part, mediated through the inhibition of IL17-producing cells and the generation of regulatory T cells. While proinflammatory cytokines such as IFNγ, TNFα, and IL1β have been shown to enhance MSCs immunosuppressive function, the role of IL17 remains poorly elucidated. The aim of this study was, therefore, to investigate the role of the IL17/IL17R pathway on MSCs immunoregulatory effects focusing on Th17 cell generation in vitro and on Th17-mediated EAE pathogenesis in vivo ...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29760423/simultaneous-amelioratation-of-colitis-and-liver-injury-in-mice-by-bifidobacterium-longum-lc67-and-lactobacillus-plantarum-lc27
#13
Se-Eun Jang, Jin-Ju Jeong, Jeon-Kyung Kim, Myung Joo Han, Dong-Hyun Kim
Disturbances in the gut microbiota composition are associated with chronic inflammatory diseases of the intestine and the liver. In a preliminary study, Lactobacillus plantarum LC27 and Bifidobacterium longum LC67 could inhibit Escherichia coli growth and lipopolysaccharide-induced NF-κB activation linked to gut inflammation. Here, we investigated their effects on 2,4,6-trinitrobenzesulfonic acid (TNBS)-induced colitis and liver damage in mice. First, oral administration of LC27 or LC67 (1 × 109 CFU/mouse) inhibited TNBS-induced colon shortening [F(5,30) = 100...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29757670/regulatory-t-cell-dynamics-with-abatacept-treatment-in-rheumatoid-arthritis
#14
Kane Langdon, Nagaraja Haleagrahara
The progressive damage in rheumatoid arthritis (RA) has been linked to an increase in inflammatory Th1/Th17 cells and a decrease in number or function of immunomodulatory regulatory T cells (Tregs). Many therapies that are effective in RA are shown to affect Th1/Th17 cells and/or Tregs. One such therapy, abatacept, utilizes a physiologic immunomodulatory molecule called cytotoxic lymphocyte antigen-4 (CTLA-4) which causes contact-dependent inhibition of inflammatory T-cell activation. Recent advances in CTLA-4 research has uncovered the method by which this occurs physiologically but the actions of the CTLA-4Ig fusion protein are still not fully understood...
May 14, 2018: International Reviews of Immunology
https://www.readbyqxmd.com/read/29756667/soluble-fgl2-restricts-autoimmune-hepatitis-progression-via-suppressing-tc17-and-conventional-cd8-t-cells-function
#15
Guo Ai, Weiming Yan, Haijing Yu, Fang Xiao, Dong Xi, Ke Ma, Jiaquan Huang, Xiaoping Luo, Xiaoyang Wan, Qin Ning
OBJECTIVE: Autoimmune hepatitis (AIH) is an inflammatory disease caused by aberrant immune response to hepatic self-antigens in which regulatory T cells (Tregs) are critical to maintain immunosupression. Soluble form of Fibrinogen-like protein 2 (sFGL2), a novel effector molecule of Treg is rarely investigated in AIH. Here, we dissected the role of sFGL2 in the autoimmune hepatitis and its potential mechanism underlying AIH progression. METHODS: Plasma and intrahepatic sFGL2 levels, as well as Treg cells were measured in both AIH patients and experimental autoimmune hepatitis (EAH) mice...
May 14, 2018: Journal of Gene Medicine
https://www.readbyqxmd.com/read/29755324/effect-of-chronic-oxidative-stress-on-neuroinflammatory-response-mediated-by-cd4-t-cells-in-neurodegenerative-diseases
#16
REVIEW
Helena Solleiro-Villavicencio, Selva Rivas-Arancibia
In a state of oxidative stress, there is an increase of reactive species, which induce an altered intracellular signaling, leading to dysregulation of the inflammatory response. The inability of the antioxidant defense systems to modulate the proinflammatory response is key to the onset and progression of neurodegenerative diseases. The aim of this work is to review the effect of the state of oxidative stress on the loss of regulation of the inflammatory response on the microglia and astrocytes, the induction of different CD4+ T cell populations in neuroinflammation, as well as its role in some neurodegenerative diseases...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29749583/il-35-a-new-immunomodulator-in-autoimmune-rheumatic-diseases
#17
REVIEW
Lazaros I Sakkas, Athanasios Mavropoulos, Carlo Perricone, Dimitrios P Bogdanos
IL-35 is a relatively new cytokine that emerges as an important immunomodulator. IL-35 belongs to IL-12 cytokine family that includes IL-12, IL-23, IL-27, and IL-35. These cytokines are heterodimers that share subunits and their receptors also share subunits. Whereas IL-12 and IL-23 are clearly proinflammatory cytokines, the role of IL-35 is less clear. In mice, IL-35 appears to be anti-inflammatory and to protect from autoimmune inflammatory diseases. IL-35 induces the expansion of a subset of regulatory T cells (Tregs) and Bregs and mediates their suppressive function and inhibits Th17 cells...
May 11, 2018: Immunologic Research
https://www.readbyqxmd.com/read/29746940/nlrp3-inflammasome-is-involved-in-the-recognition-of-paracoccidioides-brasiliensis-by-human-dendritic-cells-and-in-the-induction-of-th17-cells
#18
Lívia Furquim de Castro, Larissa Nara Alegrini Longhi, Munir Regini Paião, Amauri da Silva Justo-Júnior, Marcelo Bispo de Jesus, Maria Heloisa de Souza Lima Blotta, Ronei Luciano Mamoni
OBJECTIVES: To investigate the involvement of NLRP3 in the effector functions of human dendritic cells (DCs) in response to Paracoccidioides brasiliensis yeast cells (Pb) and to evaluate its role in the modulation of the adaptive immune response. METHODS: DCs were differentiated from purified peripheral blood monocytes and analyzed in relation to the participation of TLR-2, dectin-1, and Syk in Pb recognition, as well as, the indirect mechanisms (Reactive Oxygen Species production, endosome acidification, or K+ efflux) involved in NLRP3 inflammasome activation after the stimulus with Pb...
May 7, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29743811/the-immunoregulation-of-th17-in-host-against-intracellular-bacterial-infection
#19
REVIEW
Yonghong Li, Chaojun Wei, Hui Xu, Jing Jia, Zhenhong Wei, Rui Guo, Yanjuan Jia, Yu Wu, Yuanting Li, Xiaoming Qi, Zhenhao Li, Xiaoling Gao
T helper 17 cells (Th17) constitute a distinct subset of helper T cells with a unique transcriptional profile (STAT3, ROR γ , and ROR α ), cytokine production pattern (IL17 family), and requirement of specific cytokines for their differentiation (TGF- β , IL6, IL21, and IL23). Recent studies involving experimental animals and humans have shown that Th17/IL17 plays a crucial role in host defense against a variety of pathogens, including bacteria and viruses. The underlying mechanisms by which Th17 performs include dendritic cell (DC) regulation, neutrophil recruitment, Th1 modulation, and T regulatory cell (Treg) balance...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29741731/expression-of-grim-19-in-unexplained-recurrent-spontaneous-abortion-and-possible-pathogenesis
#20
Yang Yang, Laiyang Cheng, Xiaohui Deng, Hongling Yu, Lan Chao
STUDY QUESTION: Is aberrant expression of gene associated with retinoid-interferon-induced mortality-19 (GRIM-19) associated with unexplained recurrent spontaneous abortion (URSA)? SUMMARY ANSWER: GRIM-19 deficiency may regulate regulatory T cell/ T helper 17 cell (Treg/Th17) balance partly through reactive oxygen species (ROS) - mammalian target of rapamycin (mTOR) signaling axis in URSA. WHAT IS KNOWN ALREADY: Immunological disorders may cause impaired maternal immune tolerance to the fetus and result in fetal rejection...
May 8, 2018: Molecular Human Reproduction
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