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https://www.readbyqxmd.com/read/29323724/autoregulation-of-rank-ligand-in-oral-squamous-cell-carcinoma-tumor-cells
#1
Yuvaraj Sambandam, Purushoth Ethiraj, Jessica Hathway-Schrader, Chad Novince, Ezhil Panneerselvam, Kumaran Sundaram, Sakamuri V Reddy
Oral squamous cell carcinoma (OSCC) is the most common malignancy among oral cancers and shows potent activity for local bone invasion. Receptor activator of nuclear factor κB (RANK) ligand (RANKL) is critical for bone-resorbing osteoclast formation. We previously demonstrated that OSCC tumor cells express high levels of RANKL. In this study, confocal microscopy demonstrated RANKL specific receptor, RANK expression in OSCC tumor cell lines (SCC1, SCC12 and SCC14a). We also confirmed the expression of RANK and RANKL in primary human OSCC tumor specimens...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29306027/trichloroethylene-perturbs-hnf4a-expression-and-activity-in-the-developing-chick-heart
#2
Alondra P Harris, Kareem A Ismail, Martha Nunez, Ira Martopullo, Alejandro Lencinas, Ornella I Selmin, Raymond B Runyan
Exposure to trichloroethylene (TCE) is linked to formation of congenital heart defects in humans and animals. Prior interactome analysis identified the transcription factor, Hepatocyte Nuclear Factor 4 alpha (HNF4a), as a potential target of TCE exposure. As a role for HNF4a is unknown in the heart, we examined developing avian hearts for HNF4a expression and for sensitivity to TCE and the HNF4a agonist, Benfluorex. In vitro analysis using a HNF4a reporter construct showed both TCE and HFN4a to be antagonists of HNF4a-mediated transcription at the concentrations tested...
January 3, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29304519/effect-of-n-acetylserotonin-on-tlr-4-and-myd88-expression-during-intestinal-ischemia-reperfusion-in-a-rat-model
#3
Igor Sukhotnik, Yoav Ben Shahar, Salim Halabi, Nir Bitterman, Tatiana Dorfman, Yulia Pollak, Arnold Coran, Arie Bitterman
BACKGROUND:  Accumulating evidence indicates that changes in intestinal toll-like receptors (TLRs) precede histological injury in a rodent model of necrotizing enterocolitis. N-acetylserotonin (NAS) is a naturally occurring chemical intermediate in the biosynthesis of melatonin. A recent study has shown that treatment with NAS prevents gut mucosal damage and inhibits programmed cell death following intestinal ischemia-reperfusion (IR). The objective of this study was to determine the effects of NAS on TLR-4, myeloid differentiation factor 88 (Myd88), and TNF-α receptor-associated factor 6 (TRAF6) expression in intestinal mucosa following intestinal IR in a rat...
January 5, 2018: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29302038/short-chain-fatty-acids-regulate-systemic-bone-mass-and-protect-from-pathological-bone-loss
#4
Sébastien Lucas, Yasunori Omata, Jörg Hofmann, Martin Böttcher, Aida Iljazovic, Kerstin Sarter, Olivia Albrecht, Oscar Schulz, Brenda Krishnacoumar, Gerhard Krönke, Martin Herrmann, Dimitrios Mougiakakos, Till Strowig, Georg Schett, Mario M Zaiss
Microbial metabolites are known to modulate immune responses of the host. The main metabolites derived from microbial fermentation of dietary fibers in the intestine, short-chain fatty acids (SCFA), affect local and systemic immune functions. Here we show that SCFA are regulators of osteoclast metabolism and bone mass in vivo. Treatment of mice with SCFA as well as feeding with a high-fiber diet significantly increases bone mass and prevents postmenopausal and inflammation-induced bone loss. The protective effects of SCFA on bone mass are associated with inhibition of osteoclast differentiation and bone resorption in vitro and in vivo, while bone formation is not affected...
January 4, 2018: Nature Communications
https://www.readbyqxmd.com/read/29290971/tab3-upregulates-survivin-expression-to-promote-colorectal-cancer-invasion-and-metastasis-by-binding-to-the-tak1-traf6-complex
#5
Chen Luo, Rongfa Yuan, Leifeng Chen, Wei Zhou, Wei Shen, Yumin Qiu, Jun Shao, Jinlong Yan, Jianghua Shao
Transforming growth factor-β-activated kinase 1 (TAK1)-binding protein 3 (TAB3) is involved in cancer proliferation and metastasis, but its role in colorectal cancer remains unclear. In this study, we demonstrated that TAB3 is upregulated in colorectal cancer tissues and that high TAB3 levels correlated with tumor metastasis and a poor prognosis in colorectal cancer. In addition, TAB3 knockdown decreased Survivin expression and suppressed colorectal cancer cell migration and invasion in vitro, and reduced liver metastasis in vivo...
December 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/29288795/mir-146a-regulates-inflammatory-cytokine-production-in-porphyromonas-gingivalis-lipopolysaccharide-stimulated-b-cells-by-targeting-irak1-but-not-traf6
#6
Shaoyun Jiang, Yang Hu, Shu Deng, Jiayin Deng, Xinbo Yu, Grace Huang, Toshihisa Kawai, Xiaozhe Han
It has been suggested that microRNAs (miRs) are involved in the immune regulation of periodontitis. However, it is unclear whether and how miRs regulate the function of B cells in the context of periodontitis. This study is to explore the role of miR-146a on the inflammatory cytokine production of B cells challenged by Porphyromonas gingivalis (P. gingivalis) lipopolysaccharide (LPS). Primary B cells were harvested from mouse spleen. Quantitative real-time polymerase chain reaction (qPCR), enzyme-linked immunosorbent assay (ELISA) were used to detect the expression of inflammatory cytokines in B cells in the presence or absence of P...
December 27, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29273889/tumor-necrosis-factor-receptor-associated-factor-6-is-required-to-inhibit-foreign-body-giant-cell-formation-and-activate-osteoclasts-under-inflammatory-and-infectious-conditions
#7
Akihito Oya, Eri Katsuyama, Mayu Morita, Yuiko Sato, Tami Kobayashi, Kana Miyamoto, Toru Nishiwaki, Atsushi Funayama, Yoshinari Fujita, Takashi Kobayashi, Morio Matsumoto, Masaya Nakamura, Arihiko Kanaji, Takeshi Miyamoto
Osteoclasts and foreign body giant cells (FBGCs) are derived from common progenitors and share properties such as multi-nucleation capacity induced by cell-cell fusion; however, mechanisms underlying lineage determination between these cells remain unclear. Here we show that, under inflammatory conditions, osteoclasts are stimulated in a manner similar to M1 macrophages, while formation of FBGCs, which exhibit M2-like phenotypes, is inhibited in a manner similar to that seen in M1/M2 macrophage polarization...
December 22, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29245887/tgf%C3%AE-activates-pi3k-akt-signaling-via-traf6
#8
EDITORIAL
Jie Song, Maréne Landström
No abstract text is available yet for this article.
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29241030/expression-profiles-of-genes-involved-in-tlrs-and-nlrs-signaling-pathways-of-water-buffaloes-infected-with-fasciola-gigantica
#9
Fu-Kai Zhang, Jun-Ling Hou, Ai-Jiang Guo, Ai-Ling Tian, Zhao-An Sheng, Wen-Bin Zheng, Wei-Yi Huang, Hany M Elsheikha, Xing-Quan Zhu
Infection of ruminants and humans with Fasciola gigantica is attracting increasing attention due to its economic impact and public health significance. However, little is known of innate immune responses during F. gigantica infection. Here, we investigated the expression profiles of genes involved in Toll-like receptors (TLRs) and NOD-like receptors (NLRs) signaling pathways in buffaloes infected with 500F. gigantica metacercariae. Serum, liver and peripheral blood mononuclear cell (PBMC) samples were collected from infected and control buffaloes at 3, 10, 28, and 70days post infection (dpi)...
December 11, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29234386/neuroprotective-effect-of-modified-xijiao-dihuang-decoction-against-oxygen-glucose-deprivation-and-reoxygenation-induced-injury-in-pc12-cells-involvement-of-tlr4-myd88-nf-%C3%AE%C2%BAb-signaling-pathway
#10
Xu Zhang, Xiaojun Fei, Weiwei Tao, Jingbo Li, Hao Shen, Xuanye Wang, Hongquan Liu, Yun Xu
Modified Xijiao Dihuang (XJDH) decoction has been shown to exert powerful neuroprotective properties in clinical ischemic stroke treatment. It consists of 4 Chinese herbs: Buffalo Horn, Paeonia suffruticosa Andrews, Rehmannia glutinosa (Gaertn.) DC, and Paeonia lactiflora Pall. In the present study, the neuroprotective effect and specific mechanisms of XJDH in protecting PC12 cells from oxygen-glucose deprivation-induced injury were investigated. It was found that OGD/R significantly decreased the cell viability and lactate dehydrogenase (LDH) activity and increased the release of IL-1β, IL-6, and TNF-α in PC12 cells, and these effects were suppressed by XJDH and one of its major active constituents, paeoniflorin...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29230038/the-lps-inducible-lncrna-mirt2-is-a-negative-regulator-of-inflammation
#11
Meng Du, Lin Yuan, Xin Tan, Dandan Huang, Xiaojing Wang, Zhe Zheng, Xiaoxiang Mao, Xiangrao Li, Liu Yang, Kun Huang, Fengxiao Zhang, Yan Wang, Xi Luo, Dan Huang, Kai Huang
Toll-like receptors (TLRs) are a family of pattern recognition receptors (PRR) with a crucial function in innate immune responses. Activation of TLR4 signaling at the plasma membrane by lipopolysaccharide (LPS) stimulates proinflammatory signaling pathways dependent on the E3 ubiquitin ligase TRAF6. Here we show the LPS-induced long non-coding RNA (lncRNA) Mirt2 functions as a checkpoint to prevent aberrant activation of inflammation, and is a potential regulator of macrophage polarization. Mirt2 associates with, and attenuates Lys63 (K63)-linked ubiquitination of, TRAF6, thus inhibiting activation of NF-κB and MAPK pathways and limiting production of proinflammatory cytokines...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29228365/notch4-negatively-regulates-the-inflammatory-response-to-mycobacterium-tuberculosis-infection-by-inhibiting-tak1-activation
#12
Ruijuan Zheng, Haipeng Liu, Yilong Zhou, Dapeng Yan, Jianxia Chen, Dapeng Ma, Yonghong Feng, Lianhua Qin, Feng Liu, Xiaochen Huang, Jie Wang, Baoxue Ge
Tuberculosis (TB) caused by Mycobacterium tuberculosis (Mtb) infection remains a global threat to human health, but knowledge of the molecular mechanisms underlying the pathogenesis of TB is still limited. Although Notch4, a member of the Notch receptor family, is involved in the initiation of mammary tumors, its function in Mtb infection remains unclear. In this study, we found that Notch4-deficient mice were more resistant to Mtb infection with a much lower bacterial burden and less pathological changes in the lungs...
December 8, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29220721/novel-effect-of-methionine-enkephalin-against-influenza-a-virus-infection-through-inhibiting-tlr7-myd88-traf6-nf-%C3%AE%C2%BAb-p65-signaling-pathway
#13
Jing Tian, Xue Jiao, Xiaonan Wang, Jin Geng, Reizhe Wang, Ning Liu, Xinhua Gao, Noreen Griffin, Fengping Shan
The morbidity and mortality associated with influenza A virus infections, have stimulated the search for novel prophylactic and therapeutic drugs. The purpose of this study was to investigate the prophylactic and therapeutic effect of synthetic methionine enkephalin (MENK) on mice infected by A/PR/8/34 influenza virus (H1N1) in vivo. The results showed that MENK could exert both prophylactic and therapeutic influences on infected mice, significantly improve the survival rate, relieve acute lung injury and decrease cytokine (IFN-α, IFN-β, TNF-α, IL-6, and IL-1β) levels...
December 5, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29217822/hepatocyte-toll-like-receptor-4-mediates-lipopolysaccharide-induced-hepcidin-expression
#14
Yong-Soo Lee, Yong-Hoon Kim, Yoon Seok Jung, Ki-Sun Kim, Don-Kyu Kim, Soon-Young Na, Ji-Min Lee, Chul-Ho Lee, Hueng-Sik Choi
Hepcidin expression is induced by inflammatory molecules such as lipopolysaccharide (LPS) via a macrophage-mediated pathway. Although hepatocytes directly respond to LPS, the molecular mechanism underlying toll-like receptor (TLR)-dependent hepcidin expression by hepatocytes is mostly unknown. Here we show that LPS can directly induce the mRNA expression and secretion of hepcidin by hepatocytes via TLR4 activation. Using hepatocytes deficient in TLR4, myeloid differentiation factor 88 (MyD88) and TIR domain-containing adaptor inducing interferon-β (TRIF), we demonstrated that LPS-induced hepcidin expression by hepatocytes is regulated by its specific receptor, TLR4, via a MyD88-dependent signaling pathway...
December 8, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29215004/nlrp11-attenuates-toll-like-receptor-signalling-by-targeting-traf6-for-degradation-via-the-ubiquitin-ligase-rnf19a
#15
Chenglei Wu, Zexiong Su, Meng Lin, Jiayu Ou, Wei Zhao, Jun Cui, Rong-Fu Wang
The adaptor protein TRAF6 has a central function in Toll-like receptor (TLR) signalling, yet the molecular mechanisms controlling its activity and stability are unclear. Here we show that NLRP11, a primate specific gene, inhibits TLR signalling by targeting TRAF6 for degradation. NLRP11 recruits the ubiquitin ligase RNF19A to catalyze K48-linked ubiquitination of TRAF6 at multiple sites, thereby leading to the degradation of TRAF6. Furthermore, deficiency in either NLRP11 or RNF19A abrogates K48-linked ubiquitination and degradation of TRAF6, which promotes activation of NF-κB and MAPK signalling and increases the production of proinflammatory cytokines...
December 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/29204872/anti-inflammatory-effects-of-rosmarinic-acid-in-lipopolysaccharide-induced-mastitis-in-mice
#16
Kangfeng Jiang, Xiaofei Ma, Shuai Guo, Tao Zhang, Gan Zhao, Haichong Wu, Xiaoyan Wang, Ganzhen Deng
Rosmarinic acid (RA), a type of food additives mainly extracted from rosemary, has been reported to possess anti-inflammatory activities in some previous studies. However, the effects of RA on lipopolysaccharide (LPS)-induced mastitis have not been reported. Here, we investigated the anti-inflammatory effects of RA on LPS-induced mastitis in mice and elucidated the potential mechanisms in mouse mammary epithelial cells (mMECs). RA treatment significantly ameliorated the mammary structural damage, and reduced the activity of myeloperoxidase...
December 4, 2017: Inflammation
https://www.readbyqxmd.com/read/29202848/downregulation-of-mir-141-3p-promotes-bone-metastasis-via-activating-nf-%C3%AE%C2%BAb-signaling-in-prostate-cancer
#17
Shuai Huang, Qingde Wa, Jincheng Pan, Xinsheng Peng, Dong Ren, Yan Huang, Xiao Chen, Yubo Tang
BACKGROUND: Clinically, prostate cancer (PCa) exhibits a high avidity to metastasize to bone. miR-141-3p is an extensively studied miRNA in cancers and downregulation of miR-141-3p has been widely reported to be involved in the progression and metastasis of several human cancer types. However, the clinical significance and biological roles of miR-141-3p in bone metastasis of PCa are still unclear. METHODS: miR-141-3p expression was examined in 89 non-bone metastatic and 52 bone metastatic PCa tissues by real-time PCR...
December 4, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29201219/blockade-of-146b-5p-promotes-inflammation-in-atherosclerosis-associated-foam-cell-formation-by-targeting-traf6
#18
Nan Lin, Yi An
Atherosclerosis (AS) is a chronic inflammation in response to lipid accumulation. Increasing evidence has demonstrated that numerous microRNAs (miRs) have critical roles in inflammatory responses. A previous study suggested that miR-146b-5p is possibly associated with AS; however, its exact role has remained largely elusive. The present study aimed to investigate the potential role of miR-146b-5p in AS and to explore the underlying mechanism. Fist, the levels of miR-146b-5p were determined in foam cells and clinical specimens from patients with AS by reverse-transcription quantitative PCR...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29196212/axl-activation-attenuates-neuroinflammation-by-inhibiting-the-tlr-traf-nf-%C3%AE%C2%BAb-pathway-after-mcao-in-rats
#19
Guangyong Wu, Devin W McBride, John H Zhang
BACKGROUND AND PURPOSE: Ischemic stroke activates Toll-like receptors (TLRs), triggering rapid inflammatory cytokine production. Axl signaling has multiple roles, including regulating cytokine secretion, clearing apoptotic cells, and maintaining cell survival, however, its role in inflammation after ischemic stroke has not been examined. We hypothesized that activation of Axl by recombinant Growth-arrest-specific protein 6 (rGas6) attenuates neuroinflammation by inhibiting the TLR/TRAF/NF-κB pathway after middle cerebral artery occlusion (MCAO) in rats...
November 28, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/29193723/traf6-regulates-tumour-metastasis-through-emt-and-csc-phenotypes-in-head-and-neck-squamous-cell-carcinoma
#20
Lei Chen, Yi-Cun Li, Lei Wu, Guang-Tao Yu, Wen-Feng Zhang, Cong-Fa Huang, Zhi-Jun Sun
Epithelial-mesenchymal transition (EMT) is associated with metastasis formation, generation and maintenance of cancer stem cells (CSCs). However, the regulatory mechanisms of CSCs have not been clarified. This study aims to investigate the role of TNF receptor-associated factor 6 (TRAF6) on EMT and CSC regulation in squamous cell carcinoma of head and neck (SCCHN). We found TRAF6 was overexpressed in human SCCHN tissues, and high TRAF6 expression was associated with lymphatic metastasis and resulted in poor prognosis in patients with SCCHN...
November 29, 2017: Journal of Cellular and Molecular Medicine
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