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"Nitric Oxide" and "Autoimmunity"

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https://www.readbyqxmd.com/read/27904492/hydroxycitric-acid-ameliorates-inflammation-and-oxidative-stress-in-mouse-models-of-multiple-sclerosis
#1
Mahdi Goudarzvand, Sanaz Afraei, Somaye Yaslianifard, Saleh Ghiasy, Ghazal Sadri, Mustafa Kalvandi, Tina Alinia, Ali Mohebbi, Reza Yazdani, Shahin Khadem Azarian, Abbas Mirshafiey, Gholamreza Azizi
Hydroxycitric acid (HCA) is derived primarily from the Garcinia plant and is widely used for its anti-inflammatory effects. Multiple sclerosis can cause an inflammatory demyelination and axonal damage. In this study, to validate the hypothesis that HCA exhibits therapeutic effects on multiple sclerosis, we established female C57BL/6 mouse models of multiple sclerosis, i.e., experimental autoimmune encephalomyelitis, using Complete Freund's Adjuvant (CFA) emulsion containing myelin oligodendrocyte glycoprotein (35-55)...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27882228/oxymatrine-inhibits-microglia-activation-via-hsp60-tlr4-signaling
#2
Feijia Ding, Yunhong Li, Xiaolin Hou, Rui Zhang, Shuting Hu, Yin Wang
Oxymatrine (OMT) is an alkaloid extracted from Sophora flavescens, which has broad anti-inflammatory, antitumor and immunosuppressant actions. However, the underlying molecular mechanisms have remained elusive. Heat shock protein 60 (HSP60) has recently been shown to have an important role in autoimmune reactions. The present study aimed to investigate whether OMT exerts its anti-inflammatory effects by inhibiting microglial activation and examined the role of HSP60 in this process. Western blot analysis and ELISA showed that OMT decreased the expression and release of HSP60 by LPS-activated BV2 cells...
November 2016: Biomedical Reports
https://www.readbyqxmd.com/read/27876534/transcranial-magnetic-stimulation-modifies-astrocytosis-cell-density-and-lipopolysaccharide-levels-in-experimental-autoimmune-encephalomyelitis
#3
Francisco J Medina-Fernández, Evelio Luque, Macarena Aguilar-Luque, Eduardo Agüera, Montserrat Feijóo, Fe I García-Maceira, Begoña M Escribano, Álvaro Pascual-Leone, René Drucker-Colín, Isaac Túnez
AIMS: Experimental autoimmune encephalomyelitis (EAE) is considered a valid experimental model for multiple sclerosis, a chronic neuroinflammatory condition of the central nervous system. Additionally, some evidence has shown that some microbial products such as the bacterial lipopolysaccharide could lead to the activation of reactive immune cells, triggering neuroinflammation. Several studies have found that transcranial magnetic stimulation (TMS) may exert a neuroprotective effect. Therefore, we aimed to assess the effect of TMS on the neuroinflammation occurring in EAE...
November 19, 2016: Life Sciences
https://www.readbyqxmd.com/read/27856937/allylpyrocatechol-attenuates-collagen-induced-arthritis-via-attenuation-of-oxidative-stress-secondary-to-modulation-of-the-mapk-jak-stat-and-nrf2-ho-1-pathways
#4
Soumita De, Alak Manna, Sunanda Kundu, Sritama De Sarkar, Uttara Chatterjee, Tuhinadri Sen, Subrata Chattopadhyay, Mitali Chatterjee
Rheumatoid arthritis (RA), an inflammatory autoimmune disorder is characterized by synovial hyperplasia and bony destruction. The pathogenesis of RA includes redox dysregulation, concomitant with increased levels of pro-inflammatory mediators. As the ability of Allylpyrocatechol (APC), a phytoconstituent of Piper betle leaves to alleviate oxidative stress has been demonstrated in patients with RA, its anti-arthritic activity was evaluated in an animal model of arthritis, along with establishment of the underlying mechanism(s) of action...
November 17, 2016: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/27812760/sex-difference-in-oxidative-stress-parameters-in-spinal-cord-of-rats-with-experimental-autoimmune-encephalomyelitis-relation-to-neurological-deficit
#5
Mirjana Dimitrijević, Jelena Kotur-Stevuljević, Zorica Stojić-Vukanić, Ivana Vujnović, Ivan Pilipović, Mirjana Nacka-Aleksić, Gordana Leposavić
The study examined (a) whether there is sex difference in spinal cord and plasma oxidative stress profiles in Dark Agouti rats immunised for experimental autoimmune encephalomyelitis (EAE), the principal experimental model of multiple sclerosis, and (b) whether there is correlation between the oxidative stress in spinal cord and neurological deficit. Regardless of rat sex, with the disease development xanthine oxidase (XO) activity and inducible nitric oxide synthase (iNOS) mRNA expression increased in spinal cord, whereas glutathione levels decreased...
November 3, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27743705/emerging-role-of-mesenchymal-stem-cells-during-tuberculosis-the-fifth-element-in-cell-mediated-immunity
#6
Arshad Khan, Robert L Hunter, Chinnaswamy Jagannath
Mesenchymal stem cells (MSCs) are non-hematopoietic cells that occur in almost all human tissues and can be cultured and expanded to large numbers in vitro. They secrete growth factors, cytokines, and chemokines and express Toll-like receptors on their surface, although multiple cell biological mechanisms remain unclear. MSCs are multi-potent and can differentiate into many cell types including adipocytes, neuronal cells and osteoclasts. Despite gaps in cell biology, because of their immunomodulatory and regenerative capacity, several hundred clinical trials have used MSCs for therapy of cancer, autoimmune diseases and control of inflammation during organ transplantation...
September 28, 2016: Tuberculosis
https://www.readbyqxmd.com/read/27734496/pirfenidone-ameliorates-concanavalin-a-induced-hepatitis-in-mice-via-modulation-of-reactive-oxygen-species-nuclear-factor-kappa-b-signalling-pathways
#7
Dina S El-Agamy
OBJECTIVES: This study aimed to evaluate the potential protective effects of pirfenidone (PFD) against concanavalin A (Con A)-induced hepatitis in mice. METHODS: Autoimmune model of hepatitis was established using single intravenous injection of Con A. Mice were randomly assigned into four groups as follows: control group; Con A group; and two groups, receiving PFD in two dose levels (200, 300 mg/kg) for 5 days before Con A administration. Extent of hepatitis was studied using biochemical, histopathological and immunohistochemical estimations...
December 2016: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/27724984/differential-tlr-activation-of-murine-mesenchymal-stem-cells-generates-distinct-immunomodulatory-effects-in-eae
#8
Ana María Vega-Letter, Mónica Kurte, Catalina Fernández-O'Ryan, Melanie Gauthier-Abeliuk, Patricia Fuenzalida, Ivón Moya-Uribe, Claudia Altamirano, Fernando Figueroa, Carlos Irarrázabal, Flavio Carrión
BACKGROUND: Recently, it has been observed that mesenchymal stem cells (MSCs) can modulate their immunoregulatory properties depending on the specific in-vitro activation of different Toll-like receptors (TLR), such as TLR3 and TLR4. In the present study, we evaluated the effect of polyinosinic:polycytidylic acid (poly(I:C)) and lipopolysaccharide (LPS) pretreatment on the immunological capacity of MSCs in vitro and in vivo. METHODS: C57BL/6 bone marrow-derived MSCs were pretreated with poly(I:C) and LPS for 1 hour and their immunomodulatory capacity was evaluated...
October 10, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27710895/cd200fc-attenuates-inflammatory-responses-and-maintains-barrier-function-by-suppressing-nf-%C3%AE%C2%BAb-pathway-in-cigarette-smoke-extract-induced-endothelial-cells
#9
Junwei Xu, Lu Lu, Jing Lu, Jihui Xia, Hongjin Lu, Lin Yang, Wensheng Xia, Shihai Shen
BACKGROUND: Recent evidence suggests that CD200 fusion protein (CD200Fc), a CD200R1 agonist may attenuate inflammatory responses in autoimmune diseases and neuro-degeneration. While, little is known about the function of CD200Fc in cigarette smoke extract (CSE)-induced mouse Cardiac Microvascular Endothelial Cells (mCMECs). The present study was designed to elucidate the effects of CD200Fc on CSE-induced vascular endothelial barrier (VEB) dysfunction and inflammatory responses, which is a highly clinically relevant model of smoking related cardiovascular diseases...
October 3, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27701056/nebivolol-suppresses-asymmetric-dimethylarginine-and-attenuates-cyclosporine-induced-nephrotoxicity-and-endothelial-dysfunction-in-rats
#10
Wafaa A Hewedy, Dalia K Mostafa
BACKGROUND: Cyclosporine A (CsA)-induced nephrotoxicity is a challenging problem complicating its chronic use in a large array of autoimmune diseases, as well as in organ transplantation. A considerable body of evidence points to the involvement of nitric oxide (NO) and its endogenous synthesis inhibitor, asymmetric dimethylarginine (ADMA), in CsA-induced renal and cardiovascular adverse effects. In this study, the potential of the third generation β-blocker, nebivolol, to modify the NO/ADMA system is hypothesized to play a role in protection against CsA-induced renal injury and endothelial dysfunction...
August 31, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27677500/neutralization-versus-reinforcement-of-proinflammatory-cytokines-to-arrest-autoimmunity-in-type-1-diabetes
#11
Ayelet Kaminitz, Shifra Ash, Nadir Askenasy
As physiological pathways of intercellular communication produced by all cells, cytokines are involved in the pathogenesis of inflammatory insulitis as well as pivotal mediators of immune homeostasis. Proinflammatory cytokines including interleukins, interferons, transforming growth factor-β, tumor necrosis factor-α, and nitric oxide promote destructive insulitis in type 1 diabetes through amplification of the autoimmune reaction, direct toxicity to β-cells, and sensitization of islets to apoptosis. The concept that neutralization of cytokines may be of therapeutic benefit has been tested in few clinical studies, which fell short of inducing sustained remission or achieving disease arrest...
September 27, 2016: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/27665690/lymphangiogenesis-and-nos-localization-in-healing-process-after-tooth-extraction-in-akita-mouse
#12
Shinya Takahashi, Ryuta Kikuchi, Kimiharu Ambe, Toshihiro Nakagawa, Satoshi Takada, Takashi Ohno, Hiroki Watanabe
Type I diabetes, an autoimmune disease, induces insulin deficiency, which then disrupts vascular endothelial cell function, affecting blood and lymphatic vessels. Nitric oxide (NO) is an immune-induced destructive mediator in type I diabetes, and inhibition of its production promotes arteriosclerosis. In this study, lymphangiogenesis and expression of NO synthase (NOS) during the healing process after tooth extraction were investigated immunohistochemically in control (C57BL) and Akita mice as a diabetes model...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/27662193/overexpression-of-glutamate-decarboxylase-in-mesenchymal-stem-cells-enhances-their-immunosuppressive-properties-and-increases-gaba-and-nitric-oxide-levels
#13
Mariana Urrutia, Sebastián Fernández, Marisol González, Rodrigo Vilches, Pablo Rojas, Manuel Vásquez, Mónica Kurte, Ana María Vega-Letter, Flavio Carrión, Fernando Figueroa, Patricio Rojas, Carlos Irarrázabal, Rodrigo A Fuentealba
The neurotransmitter GABA has been recently identified as a potent immunosuppressive agent that targets both innate and adaptive immune systems and prevents disease progression of several autoimmunity models. Mesenchymal stem cells (MSCs) are self-renewing progenitor cells that differentiate into various cell types under specific conditions, including neurons. In addition, MSC possess strong immunosuppressive capabilities. Upon cytokine priming, undifferentiated MSC suppress T-cell proliferation via cell-to-cell contact mechanisms and the secretion of soluble factors like nitric oxide, prostaglandin E2 and IDO...
2016: PloS One
https://www.readbyqxmd.com/read/27614763/novel-piperazino-enaminones-suppress-pro-inflammatory-cytokines-and-inhibit-chemokine-receptor-ccr2
#14
Doreen E Szollosi, Ola A M Ghoneim, Mohammed K Manzoor, Jyothi Dhuguru, Ivan O Edafiogho
Pro-inflammatory mediators including TNF-alpha, IL-6, and nitric oxide are important for the regulation of the immune response when an infection is present, but when overproduced, it can be responsible for the development of tissue and organ injury seen in sepsis, as well as severe asthma, and autoimmune diseases such as Crohn's disease and rheumatoid arthritis. Data from our lab to characterize the novel compound enaminone E121 have suggested that macrophages stimulated with lipopolysaccharide (LPS) release significantly decreased levels of TNF-alpha and IL-6 as measured by enzyme-linked immunosorbent assay as compared to the DMSO control group...
December 2016: Inflammation
https://www.readbyqxmd.com/read/27565759/chronic-prostatitis-chronic-pelvic-pain-syndrome-impairs-erectile-function-through-increased-endothelial-dysfunction-oxidative-stress-apoptosis-and-corporal-fibrosis-in-a-rat-model
#15
Y Hu, X Niu, G Wang, J Huang, M Liu, B Peng
Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is an independent risk factor for the development of erectile dysfunction (ED). But the molecular mechanisms underlying the relationship between CP/CPPS and ED are still unclear. The aim of this study was to investigate the effect of CP/CPPS on erectile function in a rat model and the possible mechanisms. A rat model of experimental autoimmune prostatitis (EAP) was established to mimic human CP⁄CPPS. Then twenty 2-month-old male Sprague-Dawley rats were divided into EAP group and control group...
August 27, 2016: Andrology
https://www.readbyqxmd.com/read/27556858/dendritic-cell-derived-nitric-oxide-inhibits-the-differentiation-of-effector-dendritic-cells
#16
Chuanping Si, Ruihua Zhang, Tianshu Wu, Geming Lu, Yuan Hu, Hui Zhang, Feihong Xu, Peter Wei, Kang Chen, Hua Tang, Garabet Yeretssian, Huabao Xiong
Dendritic cells (DCs) play a pivotal role in the development of effective immune defense while avoiding detrimental inflammation and autoimmunity by regulating the balance of adaptive immunity and immune tolerance. However, the mechanisms that govern the effector and regulatory functions of DCs are incompletely understood. Here, we show that DC-derived nitric oxide (NO) controls the balance of effector and regulatory DC differentiation. Mice deficient in the NO-producing enzyme inducible nitric oxide synthase (iNOS) harbored increased effector DCs that produced interleukin-12, tumor necrosis factor (TNF) and IL-6 but normal numbers of regulatory DCs that expressed IL-10 and programmed cell death-1 (PD-1)...
August 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27467912/rapid-dissemination-of-ret-transgene-driven-melanoma-in-the-presence-of-non-obese-diabetic-alleles-critical-roles-of-dectin-1-and-nitric-oxide-synthase-type-2
#17
Emna Dabbeche-Bouricha, Luiza M Araujo, Masashi Kato, Armelle Prévost-Blondel, Henri-Jean Garchon
Mice transgenic for the RET oncogene provide a remarkable model for investigating the mechanisms underlying the promotion and the development of melanoma. This model was established on the C57BL/6 genetic background. In the present study, we investigated an effect of the strongly proinflammatory and autoimmune genetic makeup of the non-obese diabetic (NOD) strain. We bred (NODxB6)F1 mice and backcrossed them with NOD mice. F1 mice and mice at subsequent generations of backcrossing showed marked acceleration of tumor development, in particular with a more frequent and earlier extension of the primary uveal melanoma...
May 2016: Oncoimmunology
https://www.readbyqxmd.com/read/27357717/nailfold-capillaroscopy-assessment-of-microcirculation-abnormalities-and-endothelial-dysfunction-in-children-with-primary-or-secondary-raynaud-syndrome
#18
Joanna Latuskiewicz-Potemska, Antonina Chmura-Skirlinska, Ryszard J Gurbiel, Elzbieta Smolewska
Raynaud syndrome (RS) manifests as episodes of transient spasms of peripheral blood vessels, most often in response to cold. The reason of that symptom (primary RS (pRS)) usually cannot be found but may be accompanied by some autoimmune diseases (secondary RS (sRS)). In this study, we assessed microcapillary status and serum concentrations of chosen cytokines, adhesive molecules, and nitric oxide (NO) in patients with pRS and sRS in comparison with healthy children. Eighty-six patients with RS were enrolled into the study, including 52 with pRS and 34 with sRS...
August 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27339878/nitrosative-stress-hypernitrosylation-and-autoimmune-responses-to-nitrosylated-proteins-new-pathways-in-neuroprogressive-disorders-including-depression-and-chronic-fatigue-syndrome
#19
Gerwyn Morris, Michael Berk, Hans Klein, Ken Walder, Piotr Galecki, Michael Maes
Nitric oxide plays an indispensable role in modulating cellular signaling and redox pathways. This role is mainly effected by the readily reversible nitrosylation of selective protein cysteine thiols. The reversibility and sophistication of this signaling system is enabled and regulated by a number of enzymes which form part of the thioredoxin, glutathione, and pyridoxine antioxidant systems. Increases in nitric oxide levels initially lead to a defensive increase in the number of nitrosylated proteins in an effort to preserve their function...
June 23, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27307042/gene-expression-and-antiviral-activity-of-interleukin-35-in-response-to-influenza-a-virus-infection
#20
Li Wang, Shengli Zhu, Gang Xu, Jian Feng, Tao Han, Fanpeng Zhao, Ying-Long She, Shi Liu, Linbai Ye, Ying Zhu
Interleukin-35 (IL-35) is a newly described member of the IL-12 family. It has been reported to inhibit inflammation and autoimmune inflammatory disease and can increase apoptotic sensitivity. Little is known about the role of IL-35 during viral infection. Herein, high levels of IL-35 were found in peripheral blood mononuclear cells and throat swabs from patients with seasonal influenza A virus (IAV) relative to healthy individuals. IAV infection of human lung epithelial and primary cells increased levels of IL-35 mRNA and protein...
August 5, 2016: Journal of Biological Chemistry
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