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https://www.readbyqxmd.com/read/28942144/microgravity-influences-maintenance-of-the-human-muscle-stem-progenitor-cell-pool
#1
Tohru Hosoyama, Shunji Ichida, Masatsugu Kanno, Reiichi Ishihara, Toshikatsu Hatashima, Koji Ueno, Kimikazu Hamano
Microgravity induces skeletal muscle atrophy; however, the underlying mechanism is not clarified. In particular, the influence of microgravity on human skeletal muscle stem/progenitor cells (SMPCs) is not well understood. In this study, we used induced pluripotent stem cell-derived human SMPCs to investigate the effect of microgravity on maintenance of the stem/progenitor cell pool. Human SMPCs were induced by free-floating spherical aggregation culture, and derivatized-SMPC spheres were maintained in a microgravity condition (10(-3) G) for 2 weeks using a clinostat rotation system...
September 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28917488/gene-expression-regulation-of-the-tlr9-and-myd88-dependent-pathways-in-rock-bream-against-rock-bream-iridovirus-rbiv-infection
#2
Myung-Hwa Jung, Sung-Ju Jung
Rock bream iridovirus (RBIV), which is a member of the Megalocytivirus genus, causes severe mass mortalities in rock bream in Korea. To date, the innate immune defense mechanisms of rock bream against RBIV is unclear. In this study, we assessed the expression levels of genes related to TLR9 and MyD88-dependent pathways in RBIV-infected rock bream in high, low or no mortality conditions. In the high mortality group (100% mortality at 15 days post infection (dpi)), high levels of TLR9 and MyD88 expressions (6...
September 13, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28900044/regulation-of-autophagy-nf-%C3%AE%C2%BAb-signaling-and-cell-viability-by-mir-124-in-kras-mutant-mesenchymal-like-nsclc-cells
#3
Anita K Mehta, Kevin Hua, William Whipple, Minh-Thuy Nguyen, Ching-Ti Liu, Johannes Haybaeck, Joanne Weidhaas, Jeff Settleman, Anurag Singh
KRAS mutant non-small cell lung cancer (NSCLC) may be classified into epithelial or mesenchymal subtypes. Despite having the same "driver" mutation, mesenchymal NSCLCs are less responsive than are epithelial NSCLCs to inhibition of the RAS pathway. Identifying alternative networks that promote survival specifically in mesenchymal NSCLC may lead to more effective treatments for this subtype. Through their numerous targets in cellular signaling pathways, noncoding microRNAs (miRNAs) often function as tumor suppressors or oncogenes...
September 12, 2017: Science Signaling
https://www.readbyqxmd.com/read/28895065/structural-characterization-of-the-trimerization-of-traf6-protein-through-molecular-dynamics-simulations
#4
Ria Biswas, Angshuman Bagchi
The tumour necrosis factor (TNF) receptor-associated factor (TRAF) family of proteins having E3 ligase activity are the key molecules involved in cellular immune response pathways. TRAF6 is a unique member of the TRAF superfamily differing from other members of the family, owing to its specific interactions with molecules outside the TNF receptor superfamily. The C-terminal domain of TRAF proteins contains the catalytic residues and are known to be involved in self-oligomerization forming a mushroom-shaped trimeric structure, which is the functional form of the protein...
September 11, 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28886971/traf6-a-player-in-cvb3-induced-myocarditis
#5
Oana N Ursu, Tina Beyer, Martina Sauter, Annunziata Fragasso, Sandra Bundschuh, Karin Klingel, Barbara Munz
Coxsackievirus B3 (CVB3) is an important inducer of myocarditis, which, in susceptible individuals, can chronify and eventually lead to the development of dilated cardiomyopathy and heart failure. The respective mechanisms are not completely understood. Here, we analyzed expression of the TRAF6 gene, encoding TNF receptor-associated factor 6 (TRAF6), a signal transduction scaffold protein that acts downstream of cytokine receptors, in heart tissue of susceptible and non-susceptible mouse strains. We found that after infection, TRAF6 expression was upregulated in both non-susceptible C57BL/6 wildtype and susceptible A...
September 5, 2017: Cytokine
https://www.readbyqxmd.com/read/28884970/a-dithiol-compound-binds-to-the-zinc-finger-protein-traf6-and-suppresses-its-ubiquitination
#6
Ryoko Koga, Mohamed O Radwan, Tomohiko Ejima, Yosuke Kanemaru, Hiroshi Tateishi, Taha F S Ali, Halil Ibrahim Ciftci, Yuri Shibata, Yuu Taguchi, Jun-Ichiro Inoue, Masami Otsuka, Mikako Fujita
Despite various inhibitors targeting the zinc center(s) of enzymes, drugs that target zinc fingers have not been examined in detail. We already developed a dithiol compound named SN-1 having an inhibitory effect on function of zinc finger transcription factors, but its mechanism has not been elucidated yet. For establishment of a general principle of new drugs, the detail of the action of SN-1 against a zinc finger protein was examined. As a zinc finger-containing protein, we focused on TRAF6 related to cancer and inflammation...
September 8, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28882891/identification-of-optineurin-as-an-interleukin-1-receptor-associated-kinase-1-binding-protein-and-its-role-in-regulation-of-myd88-dependent-signaling
#7
Mitsuyoshi Tanishima, Shigeo Takashima, Arata Honda, Daisuke Yasuda, Takashi Tanikawa, Satoshi Ishii, Takashi MaruYama
Upon stimulation of toll-like receptor (TLR) with various microbial ligands, induction of a variety of inflammatory genes is elicited by activation of a myeloid differentiation primary-response protein 88 (MyD88)-dependent signaling pathway. Interleukin-1 (IL-1) receptor-associated kinase 1 (IRAK1) plays an essential role in this pathway by activating nuclear factor κB (NF-κB) and mitogen-activated kinases (MAPK). Here, we identified optineurin (OPTN) as an IRAK1-binding protein by yeast two-hybrid screening using IRAK1 as bait...
September 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28878285/interleukin-33-promotes-inflammation-induced-lymphangiogenesis-via-st2-traf6-mediated-akt-enos-no-signalling-pathway
#8
Longhui Han, Minglian Zhang, Xu Liang, Xin Jia, Jinchen Jia, Miying Zhao, Yiming Fan
The interplay between inflammation and lymphangiogenesis is mediated by various cytokines. However, most of these molecules and their associated mechanism are yet to be defined. Here, we explored the role of IL-33 in modulating inflammation-induced lymphangiogenesis (ILA) and its underlying mechanisms using an ILA mouse model and a lymphatic endothelial cell (LEC) line. Our results show that IL-33 promoted the proliferation, migration and tube formation of LECs and ILA in vivo. The pro-lymphangiogenic activity of IL-33 was abolished by ST2 blockage...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28872665/expression-of-human-cathelicidin-peptide-ll-37-in-inflammatory-bowel-disease
#9
Shoko Kusaka, Atsushi Nishida, Kenichiro Takahashi, Shigeki Bamba, Hiroyuki Yasui, Masahiro Kawahara, Osamu Inatomi, Mitsushige Sugimoto, Akira Andoh
Cathelicidin peptide LL-37 plays an important role in the early host response against invading pathogens via its broad-spectrum antimicrobial activity. In this study, we investigated LL-37 expression in the inflamed mucosa of IBD patients. Furthermore, the regulatory mechanism of LL-37 induction was investigated in human colonic subepithelial myofibroblasts (SEMFs). LL-37 mRNA expression and protein secretion were analyzed using real-time polymerase chain reaction and enzyme-linked immunosorbent assay, respectively...
September 5, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28870889/mir-194-as-predictive-biomarker-of-responsiveness-to-neoadjuvant-chemoradiotherapy-in-patients-with-locally-advanced-rectal-adenocarcinoma
#10
Edoardo D'Angelo, Carlo Zanon, Francesca Sensi, Maura Digito, Massimo Rugge, Matteo Fassan, Marco Scarpa, Salvatore Pucciarelli, Donato Nitti, Marco Agostini
AIMS: Curative surgery remains the primary form of treatment for locally advanced rectal cancer (LARC). Recent data support the use of preoperative chemoradiotherapy (pCRT) to improve the prognosis of LARC with a significant reduction of local relapse and an increase of overall survival. Unfortunately, only 20% of the patients with LARC present complete pathological response after pCRT, whereas in 20%-40%, the response is poor or absent. METHODS: We investigated the expression level of miR-194 in n=38 patients with LARC using our public microRNA (miRNA) expression dataset...
September 4, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28870856/transcriptome-analysis-of-hybrid-tilapia-oreochromis-spp-with-streptococcus-agalactiae-infection-identifies-toll-like-receptor-pathway-mediated-induction-of-nadph-oxidase-complex-and-piscidins-as-primary-immune-related-responses
#11
Chuian-Fu Ken, Chieh-Ning Chen, Chen-Hung Ting, Chieh-Yu Pan, Jyh-Yih Chen
Streptococcus agalactiae infection is one of the most significant bacterial diseases in tilapia aquaculture. Identification of immune-related genes associated with Streptococcus agalactiae infection may provide a basis for breeding selection or therapeutics to augment disease resistance. Therefore, we utilized transcriptome profiling to study the host response in tilapia following Streptococcus agalactiae infection. Based on GO and KEGG enrichment analyses, we found that differentially expressed genes are widely involved in immune-related pathways, including the induction of antimicrobial peptides...
September 7, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28869835/inhibition-of-traf6-ubc13-interaction-in-nfkb-inflammatory-pathway-by-analyzing-the-hotspot-amino-acid-residues-and-protein-protein-interactions-using-molecular-docking-simulations
#12
Ria Biswas, Angshuman Bagchi
Protein-protein interactions (PPIs) are important in most of the biochemical processes. Hotspot amino acid residues in proteins are the most important contributors for proper protein-protein interactions. Hotspot amino acid residues have been looked down upon as important therapeutic targets in inhibiting PPIs. Interaction between TRAF6 and Ubc13 is a crucial point in the NFkB inflammatory pathway. Dysfunction of the NFkB pathway is associated with numerous human diseases including cancer and neurodenegeration disorders...
September 1, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28858844/can-regular-moderate-exercise-lead-to-changes-in-mirna-146a-and-its-adapter-proteins-in-the-kidney-of-streptozotocin-induced-diabetic-male-rats
#13
H Oghbaei, N Ahmadi Asl, F Sheikhzadeh
OBJECTIVE: The aim of this study was to assess whether microRNA-146a and its adapter proteins TNF receptor associated factor6 (TRAF6) and interleukin-1 receptor-associated kinase-1 (IRAK1) may be changed in the kidney of streptozotocin-induced diabetic rats, following regular moderate exercise. METHODS: Forty adult male Wistar rats were allocated randomly into four groups (n=10), including sedentary control (SC), sedentary diabetic (SD), healthy sixty-day exercise (H60E), and diabetic sixty-day exercise (D60E) groups...
July 1, 2017: Endocrine Regulations
https://www.readbyqxmd.com/read/28846086/the-rna-helicase-ddx46-inhibits-innate-immunity-by-entrapping-m-6-a-demethylated-antiviral-transcripts-in-the-nucleus
#14
Qingliang Zheng, Jin Hou, Ye Zhou, Zhenyang Li, Xuetao Cao
DEAD-box (DDX) helicases are vital for the recognition of RNA and metabolism and are critical for the initiation of antiviral innate immunity. Modification of RNA is involved in many biological processes; however, its role in antiviral innate immunity has remained unclear. Here we found that nuclear DDX member DDX46 inhibited the production of type I interferons after viral infection. DDX46 bound Mavs, Traf3 and Traf6 transcripts (which encode signaling molecules involved in antiviral responses) via their conserved CCGGUU element...
October 2017: Nature Immunology
https://www.readbyqxmd.com/read/28844714/up-regulation-of-olr1-expression-by-tbc1d3-through-activation-of-tnf%C3%AE-nf-%C3%AE%C2%BAb-pathway-promotes-the-migration-of-human-breast-cancer-cells
#15
Bei Wang, Huzi Zhao, Lei Zhao, Yongchen Zhang, Qing Wan, Yong Shen, Xiaodong Bu, Meiling Wan, Chuanlu Shen
Metastatic spread of cancer cells is the most life-threatening aspect of breast cancer and involves multiple steps including cell migration. We recently found that the TBC1D3 oncogene promotes the migration of breast cancer cells, and its interaction with CaM enhances the effects of TBC1D3. However, little is known regarding the mechanism by which TBC1D3 induces the migration of cancer cells. Here, we demonstrated that TBC1D3 stimulated the expression of oxidized low density lipoprotein receptor 1 (OLR1), a stimulator of cell migration, in breast cancer cells at the transcriptional level...
August 24, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28844021/tlr2-tlr3-and-tlr5-regulation-of-pro-inflammatory-and-pro-labour-mediators-in-human-primary-myometrial-cells
#16
Ratana Lim, Gillian Barker, Martha Lappas
Preterm birth continues to be a significant global health care issue, due to our lack of understanding of the mechanisms that drive human labour and delivery. Toll-like receptors (TLRs) are essential in triggering an inflammatory response in human gestational tissues, leading to the production of pro-inflammatory and pro-labour mediators, and thus preterm birth. The aims of this study were to determine whether the adaptor molecules associated with TLR2, TLR3 and TLR5 signalling are involved in human myometrium...
August 24, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28837866/protective-effect-of-aspirin-triggered-resolvin-d1-on-hepatic-ischemia-reperfusion-injury-in-rats-the-role-of-mir-146b
#17
Tao Zhang, Huan-Huan Xiu, Jia-Xin Liu, Yi Ma, Kang-Qing Xu, Wen-Qi Huang
PURPOSE: Inflammatory responses play an important role in the tissue injury during liver ischemia/reperfusion (I/R). We previously reported that resolvin D1 (RvD1) administrated prior to hepatic I/R attenuates liver injury through inhibition of inflammatory response. In this study, we investigated the effects of the aspirin-triggered resolvin D1 (AT-RvD1) on hepatic I/R and the role of miR-146b in this process. METHODS: Partial warm ischemia was performed in the left and middle hepatic lobes of Sprague-Dawley rats for 1h, followed by 6h of reperfusion...
August 21, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28822790/galectin-3-as-a-novel-regulator-of-osteoblast-osteoclast-interaction-and-bone-homeostasis
#18
Dominic Simon, Anja Derer, Fabian T Andes, Patrick Lezuo, Aline Bozec, Georg Schett, Martin Herrmann, Ulrike Harre
Bone tissue undergoes permanent and lifelong remodeling with a concerted action of bone-building osteoblasts and bone-resorbing osteoclasts. A precise cooperation between those two cell types is critical in the complex process of bone renewal. Galectin-3 is a member of the β-galactoside-binding lectin family playing multiple roles in cell growth, differentiation and aggregation. As it has been described to be expressed in bone, galectin-3 might influence bone homeostasis by regulating the function and/or interplay of osteoblasts and osteoclasts...
August 16, 2017: Bone
https://www.readbyqxmd.com/read/28821402/tbk1-of-black-carp-plays-an-important-role-in-host-innate-immune-response-against-svcv-and-gcrv
#19
Chuanzhe Yan, Jun Xiao, Jun Li, Hui Chen, Ji Liu, Chanyuan Wang, Chaoliang Feng, Hao Feng
Tank-binding kinase 1 (TBK1) plays a pivotal role in the induction of type I IFNs in higher vertebrates. To explore the function of TBK1 in teleost, TBK1 of black carp (Mylopharyngodon Piceus) was cloned and characterized in this paper. The full-length cDNA of black carp TBK1 (bcTBK1) consists of 2857 nucleotides and the predicted bcTBK1 protein contains 727 amino acids, which includes an N-terminal kinase domain (KD), an ubiquitin-like domain (ULD) and two C-terminal coiled-coils. The transcription of bcTBK1 was constitutively detected in all the selected tissues and bcTBK1 mRNA level was increased in all selected tissues in response to SVCV or GCRV infection except that in muscle post GCRV invasion...
August 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28811654/characterization-of-the-mollusc-rig-i-mavs-pathway-reveals-an-archaic-antiviral-signalling-framework-in-invertebrates
#20
Baoyu Huang, Linlin Zhang, Yishuai Du, Fei Xu, Li Li, Guofan Zhang
Despite the mitochondrial antiviral signalling protein (MAVS)-dependent RIG-I-like receptor (RLR) signalling pathway in the cytosol plays an indispensable role in the antiviral immunity of the host, surprising little is known in invertebrates. Here we characterized the major members of RLR pathway and investigated their signal transduction a Molluscs. We show that genes involved in RLR pathway were significantly induced during virus challenge, including CgRIG-I-1, CgMAVS, CgTRAF6 (TNF receptor-associated factor 6), and CgIRFs (interferon regulatory factors...
August 15, 2017: Scientific Reports
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