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il 17 inhibition

Sha-Sha Huang, Qiu-Bing Zhang, Qing-Yan Yuan, Si-Li He, Yuan-Ming Zhang
INTRODUCTION: Activation of T lymphocytes, for which potassium channels are essential, is involved in the development of hypertension. In this study, we explored the inhibitory effects of telmisartan on the culture and proliferation of and Kv1.3 potassium channel expression in peripheral blood CD4(+) T lymphocytes derived from Xinjiang Kazakh patients with hypertension. METHODS: CD4(+) T-cell samples from hypertensive Kazakh patients and healthy Kazakh people were divided into healthy control, case control, telmisartan, and 4-aminopytidine groups...
October 2016: Journal of the Renin-angiotensin-aldosterone System: JRAAS
Seyyed Meysam Abtahi Froushani, Leila Zarei, Hadi Esmaeili Gouvarchin Ghaleh, Bahman Mansori Motlagh
OBJECTIVE: Some evidence suggests that chronic uptake of estragole and methyl-eugenol, found in the essential oil of Artemisia dracunculus (tarragon), may be associated with an increased risk of hepato-carcinogenicity. The present study was conducted to investigate the immumodulatory and anti-inflammatory potentials of estragole and methyl-eugenol free extract of tarragon. MATERIALS AND METHODS: Aqueous, hydroalcoholic, methanol and hexane extracts of dried and milled tarragon was prepared and analyzed by GC-MS...
September 2016: Avicenna Journal of Phytomedicine
Su-Min Lim, Hyun Sik Choi, Jin-Ju Jeong, Seung-Won Han, Dong-Hyun Kim
We investigated the effect of DWac on the gut microbiota composition in mice with 2,3,6-trinitrobenzenesulfonic acid- (TNBS-) induced colitis. Treatment with DWac restored TNBS-disturbed gut microbiota composition and attenuated TNBS-induced colitis. Moreover, we examined the effect of DWac in mice with mesalazine-resistant colitis (MRC). Intrarectal injection of TNBS in MRC mice caused severe colitis, as well as colon shortening, edema, and increased myeloperoxidase activity. Treatment with mesalazine (30 mg/kg) did not attenuate TNBS-induced colitis in MRC mice, whereas treatment with DWac (30 mg/kg) significantly attenuated TNBS-induced colitis...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
Kelly M Cordoro, Derya Ucmak, Maria Hitraya-Low, Michael D Rosenblum, Wilson Liao
No abstract text is available yet for this article.
October 19, 2016: JAMA Dermatology
Hirotsugu Nagase, Tomohira Takeoka, Shinya Urakawa, Akiko Morimoto-Okazawa, Atsunari Kawashima, Kota Iwahori, Shuji Takiguchi, Hiroyoshi Nishikawa, Eiichi Sato, Shimon Sakaguchi, Masaki Mori, Yuichiro Doki, Hisashi Wada
Regulatory T cells (Tregs) have an immunosuppressive role in the tumor microenvironment. Since effector Tregs (eTregs), which have highly suppressive functions, are located in a subpopulation of Foxp3(+) CD4(+) Tregs, the TCR-inducible costimulatory receptor (ICOS) was applied as a marker of eTregs that infiltrated gastric cancer tissue and the induction pathway of ICOS(+) Foxp3(+) cells was analyzed by flow cytometry and immunohistochemistry. In tumor-infiltrating lymphocytes (TILs), ICOS(+) Foxp3(+) CD4(+) T cells were abundantly observed in the late stages of gastric cancer...
October 18, 2016: International Journal of Cancer. Journal International du Cancer
Arash Pourgholaminejad, Nasser Aghdami, Hossein Baharvand, Seyed Mohammad Moazzeni
T-Helper 17 (TH17) cells are a CD4(+) TH subset that plays a critical role in the pathophysiology of inflammatory disorders, especially chronic forms. It seems that the derivation of TH17 cells from their precursors take place in inflammatory microenvironment. The role of transforming growth factor (TGF)-β as an anti-inflammatory cytokine in TH17 cell differentiation is controversial. To address some of the discrepancies that exist among different studies, this study was undertaken to more clarify the TGFβ role in human TH17 cell differentiation...
October 18, 2016: Journal of Immunotoxicology
David Harrison
Hypertension remains an enormous health care burden that affects one third of the population. Despite its prevalence the cause of most cases of hypertension remains unknown. Our laboratory has defined a novel mechanism for hypertension involving adaptive immunity. We found that mice lacking lymphocytes (RAG-1 mice) develop blunted hypertensive responses to a variety of stimuli including chronic angiotensin II infusion, DOCA-salt challenge and norepinephrine infusion. Adoptive transfer of T cells, but not B cells, restores the hypertensive responses to these stimuli...
September 2016: Journal of Hypertension
Byeong Hwa Jeon
Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein that plays a central role in the cellular response to DNA damage and redox regulation against oxidative stress. APE1/Ref-1 is essential for cellular survival and embryonic lethal in knockout mouse models. Heterozygous APE1/Ref-1 mice showed impaired endothelium-dependent vasorelaxation, reduced vascular NO levels, and are hypertensive. APE1/Ref-1 reduces intracellular reactive oxygen species production by negatively regulating the activity of the NADPH oxidase...
September 2016: Journal of Hypertension
X M Chen, F Q Li, S Yan, X C Wu, C L Tang
OBJECTIVE: To investigate the anti-inflammation effects by activation of the cholinergic anti-inflammatory pathway and its mechanisms in non-alcoholic steatohepatitis (NASH) model mice. METHODS: 6-week-old male C57BL/6J (B6) mice were randomly divided into four groups: the first group was normal mice, injected with saline; the second group was normal mice, injected with nicotine; the third group was NASH model mice, injected with saline; the fourth group was NASH model mice, injected with nicotine...
October 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Hyun Sook Hong, Dae Yeon Hwang, Ju Hyeong Park, Suna Kim, Eun Jung Seo, Youngsook Son
Intestinal inflammation alters immune responses in the mucosa and destroys colon architecture, leading to serious diseases such as inflammatory bowel disease (IBD). Thus, regulation of inflammation is regarded as the ultimate therapy for intestinal disease. Substance-P (SP) is known to mediate proliferation, migration, and cellular senescence in a variety of cells. SP was found to mobilize stem cells from bone marrow to the site of injury and to suppress inflammatory responses by inducing regulatory T cells (Tregs) and M2 macrophages...
October 14, 2016: Cytokine
Yifeng Cai, Shoubao Ma, Yuejun Liu, Huanle Gong, Qiao Cheng, Bo Hu, Yan Wu, Xiao Yu, Chen Dong, Kai Sun, Depei Wu, Haiyan Liu
The role of IL-17 and IL-17-producing CD4(+) T cells in acute graft-versus-host disease (GVHD) has been controversial in recent mouse and human studies. We carried out studies in a murine acute GVHD model of fully major histocompatibility complex-mismatched myeloablative bone marrow transplantation. We showed that donor wild-type CD4(+) T cells exacerbated acute GVHD compared with IL-17(-/-) CD4(+) T cells, while IL-17 reduced the severity of acute GVHD. The augmentation of acute GVHD by transferred donor IL-17-producing CD4(+) T cells was associated with increased Th1 responses, while IL-17 decreased the percentages of Th1 cells in the GVHD target organs...
October 17, 2016: Cellular & Molecular Immunology
Philip Mease, Iain B McInnes
INTRODUCTION: Psoriatic arthritis (PsA) is an immune-mediated chronic inflammatory arthropathy associated with impaired physical function and reduced quality of life. Biologic therapies that target tumor necrosis factor (anti-TNF) have significantly improved clinical outcomes. Partial, non- and transient responses remain common comprising significant unmet clinical need. New therapies with novel modes of action are urgently required. OBJECTIVES: The interleukin (IL)-17 pathway has recently been attributed a critical role in the pathogenesis of spondyloarthritides...
June 2016: Rheumatol Ther
Chantal Kuhn, Rafael M Rezende, Andre Pires da Cunha, Fabrice Valette, Francisco J Quintana, Lucienne Chatenoud, Howard L Weiner
CD3-specific monoclonal antibody (mAb) treats autoimmune disease in animal models and has shown promise in clinical trials of type 1 diabetes. Whereas intravenous administration of CD3-specific mAb acts primarily by transient depletion of activated effector T cells, oral CD3-specific mAb acts primarily by the induction Tregs. We investigated whether oral CD3-specific mAb inhibits disease in non obese diabetic (NOD) mice that spontaneously develop autoimmune diabetes, closely resembling human type 1 diabetes...
October 10, 2016: Journal of Autoimmunity
Shu-Jing Yu, Rong Jiang, Ying Z Mazzu, Cai-Bing Wei, Zong-Liang Sun, Yu-Zhen Zhang, Lian-Di Zhou, Qi-Hui Zhang
Drug-induced liver injury (DILI) is the most common cause of acute liver failure. Disruption of the Th17/Treg balance can lead to hepatic inflammation, which causes the main symptoms of DILI. Here we investigate the protective mechanisms of (-)-Epigallocatechin-3-gallate (EGCG) on triptolide (TP)-induced DILI that shows the Th17/Treg imbalance. Pretreatment with EGCG (5[Formula: see text]mg/kg) for 10 days before TP (0.5[Formula: see text]mg/kg) administration in mice significantly reduced the increased alanine aminotransferase (ALT) level ([Formula: see text]) induced by TP treatment...
2016: American Journal of Chinese Medicine
Jian-Ying Wang, Ying Yuan, Xiao-Jun Chen, Sheng-Guang Fu, Lei Zhang, Yan-Long Hong, Sheng-Fu You, Yong-Qing Yang
ETHNOPHARMACOLOGICAL RELEVANCE: Eucommia Ulmoides Oliv., a valuable Chinese herb, has shown a variety of health benefits. Despite the widespread clinical use of this herb to treat rheumatoid arthritis (RA) in Traditional Chinese Medicine (TCM), very few studies have described its anti-pathological effects or mechanism in RA. The present study investigated the mechanism of Eucommia Ulmoides Oliv. in an experimental collagen-induced arthritis (CIA) rat model. MATERIALS AND METHODS: The effects of four different Eucommia Ulmoides Oliv...
October 12, 2016: Journal of Ethnopharmacology
Buka Samten, Stewart Fannin, Krishna Sarva, Na Yi, Murty Madiraju, Malini Rajagopalan
Mycobacterium tuberculosis secretes a number of proteins into the extracellular milieu during growth. Several of these proteins have been associated with modulation of the host immune response. Antigen 84, or Wag31, is one such protein that is conserved among all mycobacterial species and is recognized by the sera from tuberculosis and leprosy patients. Here, we examined the effect of Wag31 on the ability of activated human T cells to produce cytokines such as IL-10, IL-17 and IFN-γ in response to combined anti-CD3 and anti-CD28 stimulation...
September 28, 2016: Tuberculosis
Soad Nady, Mohamed Tarek M Shata, Mohammad A Mohey, Ayatollah El-Shorbagy
The role of T helper-17 (Th17) lymphocytes in the regulation of Schistosoma mansoni Soluble Egg Ags (SEA)-induced granuloma is unknown. The present study examined the effect of Th17 cytokines (IL-17 and IL-22) on granulocytes recruitment and functions during SEA-induced granuloma formation in vitro in Schistosoma-infected and non-infected individuals. Granulocytes were isolated from 27 Schistosoma-infected patients and 13 controls and were used for granuloma induction using SEA-conjugated polyacrylamide beads in the presence of Th17 cytokines...
October 14, 2016: Parasite Immunology
Maria C Lebre, Pedro L Vieira, Man Wai Tang, Saïda Aarrass, Boy Helder, Thomas Newsom-Davis, Paul P Tak, Gavin R Screaton
Bone and cartilage destruction is one of the key manifestations of rheumatoid arthritis (RA). Although the role of T helper (Th)17 cells in these processes is clear, the role of IL-21-producing cells T cells has been neglected. We sought to investigate the role of IL-21 in RA by focusing on the functional characteristics of the main producers of this cytokine, synovial CD4(+)IL-21(+) T cells. We show that the frequency of both synovial fluid (SF) CD4(+)IL-21(+) or CD4(+)IL-21(+)TNF(+) T cells in patients with RA was significantly higher compared with patients with psoriatic arthritis (PsA)...
October 12, 2016: Journal of Leukocyte Biology
Qi Zhong, Kai Zhou, Qiao-Li Liang, Sen Lin, Yan-Chun Wang, Xiao-Yi Xiong, Zhao-You Meng, Ting Zhao, Wen-Yao Zhu, Yuan-Rui Yang, Mao-Fan Liao, Qiu-Wen Gong, Liang Liu, Ao Xiong, Junwei Hao, Jian Wang, Qing-Wu Yang
BACKGROUND: Neuroinflammation plays a key role in intracerebral hemorrhage (ICH)-induced secondary brain injury, but the specific roles of peripheral inflammatory cells such as macrophages and lymphocytes remain unknown. The purpose of this study was to explore the roles of macrophages, T lymphocytes, and the cytokines they secrete as potential targets for treating secondary brain injury after ICH. METHODS AND RESULTS: Our results showed that peripheral macrophages and T lymphocytes successively infiltrated the brain, with macrophage counts peaking 1 day after ICH and T-lymphocyte counts peaking after 4 days...
October 11, 2016: Journal of the American Heart Association
Sergio Romagnani
The interleukin (IL)-4-induced gene1 (IL4I1), which encodes the L-amino acid oxidase enzyme, plays an important immunoregulatory role. Indeed, this enzyme which is produced by B cells-including neoplastic B cells-dendritic cells and macrophages has been shown to inhibit proliferation, cytotoxicity and IFN-γ production by tumor-infiltrating CD8(+) T cells, thus favoring tumor escape. Moreover, the same gene has been found to be constitutively expressed by CD4(+) T helper 17 (Th17) cells, where it down-regulates cell proliferation through a reduction of CD3 chains expression in the T-cell receptor complex, thus impairing IL-2 production, and by maintaining in the same cells a high expression of Tob1, which inhibits cell cycle entry, through a still unknown mechanism...
October 2016: European Journal of Immunology
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