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Biochemical and Biophysical Research Communications

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https://www.readbyqxmd.com/read/30007440/lncrna-nkila-upregulation-mediates-oxygen-glucose-deprivation-re-oxygenation-induced-neuronal-cell-death-by-inhibiting-nf-%C3%AE%C2%BAb-signaling
#1
Mei Wang, Ying-Mei Jiang, Ling-Yang Xia, Ying Wang, Wen-Yuan Li, Tao Jin
Oxygen glucose deprivation (OGD)/re-oxygenation (OGDR) induces severe injury to neuronal cells. The expression and potential function of NKILA (NF-κB Interacting LncRNA) in OGDR-treated neuronal cells were tested in this study. We show that OGDR induced NKILA upregulation to in-activate NF-κB signaling in SH-SY5Y cells and primary murine hippocampal neurons. Conversely, shRNA-mediated NKILA silencing almost reversed OGDR-induced NF-κB inhibition. OGDR-induced neuronal cell viability reduction, apoptosis and necrosis were largely attenuated by NKILA shRNA as well...
July 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30007439/strong-tcr-stimulation-promotes-the-stabilization-of-foxp3-expression-in-regulatory-t-cells-induced-in-vitro-through-increasing-the-demethylation-of-foxp3-cns2
#2
Wakamatsu Ei, Omori Hiroki, Kawano Akihisa, Ogawa Shuhei, Abe Ryo
Foxp3 is the master transcriptional regulator of regulatory T cells (Tregs), and the stabilization of Foxp3 expression is regulated by the demethylation of conserved non-coding sequence 2 (CNS2) in the Foxp3 locus. Recent studies have shown that TCR stimulation is required for the demethylation of Foxp3 CNS2 during Treg development. However, the relationship between the strength of TCR stimulation and the demethylation of Foxp3 CNS2 remains unclear. To address this issue, we compared the frequency of demethylation of the Foxp3 CNS2 among in vitro-induced Tregs (iTreg) that had received a range of TCR stimulation during their development...
July 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30007438/tlr4-mediates-high-fat-diet-induced-physiological-changes-in-mice-via-attenuating-ppar%C3%AE-abcg1-signaling-pathway
#3
Xiao-Jie Cao, Ming-Jie Zhang, Li-Li Zhang, Ke Yu, Yang Xiang, Xin Ding, Jin Fan, Jing-Cheng Li, Qing-Song Wang
High-fat diet (HFD) is known to promote atherosclerosis which accelerates the development of atherosclerotic cardiovascular diseases. Vascular dysfunction characterized by inflammation and lipid accumulation is common in atherosclerosis caused by HFD. The specific effects of HFD on blood vessels and the underlying mechanisms need to be further clarified. Toll-like receptor 4 (TLR4) is a key contributing factor in atherosclerosis and TLR4 deficiency protects vascular smooth muscle cells against inflammatory responses and lipid accumulation in vitro...
July 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30007437/differential-expression-of-cyclosporine-a-induced-calcineurin-isoform-specific-matrix-metalloproteinase-9-mmp-9-in-renal-fibroblasts
#4
Cynthia E Francis, Yun Bai
Long-term treatment with the potent immunosuppressive drug cyclosporine A (CsA) results in chronic nephrotoxicity. Its immunosuppressive properties are due to the inhibition of the calcium- and calmodulin-dependent phosphatase protein calcineurin A (CnA) which has three catalytic isoforms. Of those, the CnAα and β isoforms are ubiquitously expressed, particularly in the kidney. Additionally, chronic nephrotoxicity has been associated with an imbalance of extracellular matrix (ECM) synthesis and degradation resulting in an accumulation of ECM molecules...
July 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30007441/administration-of-plasmacytoid-dendritic-cell-stimulative-lactic-acid-bacteria-enhances-antigen-specific-immune-responses
#5
Hiroaki Suzuki, Kenta Jounai, Konomi Ohshio, Toshio Fujii, Daisuke Fujiwara
Lactic acid bacteria (LAB) have been reported to have beneficial effects on protective immunity against viruses and pathogenic bacteria by activating innate immune cells such as dendritic cells (DC) or macrophages. However, little is known about whether LAB contributes to antigen-specific immune responses. Because plasmacytoid DC (pDC) links innate and acquired immunity, here we investigated whether the pDC-stimulative LAB, Lactococcus lactis strain Plasma (LC-Plasma), influences antigen-specific immune responses...
July 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30007436/lichen-ketosynthase-domains-are-not-responsible-for-inoperative-polyketide-synthases-in-ascomycota-hosts
#6
Mona E Abdel-Hameed, Robert L Bertrand, Lynda J Donald, John L Sorensen
Efforts by lichenologists to characterize lichen polyketide synthases (PKS) through heterologous expression experiments have so far proved unfruitful. A determination of systematic causes of failure is therefore required. Three hypotheses involving the ketosynthase (KS) domain of lichen polyketide synthases (PKS) from Cladonia uncialis are tested: (1) Horizontal versus vertical gene transfer; (2) Typical versus atypical active site residues; (3) Typical versus atypical tertiary protein structure and active site architecture...
July 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005871/diosgenin-inhibited-the-expression-of-taz-in-hepatocellular-carcinoma
#7
Zhize Chen, Jingjing Xu, Yang Wu, Shaoqing Lei, Huimin Liu, Qingtao Meng, Zhongyuan Xia
Emerging evidence has supported that TAZ (transcriptional co-activator with PDZ binding motif), one transcription co-activator in Hippo signaling pathway, plays an oncogenic role in liver carcinogenesis. Targeting TAZ could be a potential therapeutic approach for liver cancer patients. In the current study, we aim to determine whether diosgenin could be an inhibitor of TAZ in liver cancer cells. We found that diosgenin inhibited the expression of TAZ in liver cancer cells. Moreover, we found that diosgenin inhibited cell growth, induced apoptosis, suppressed cell migration and invasion in part via inhibition of TAZ in liver cancer cells...
July 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005877/structural-insights-into-a-novel-functional-dimer-of-staphylococcus-aureus-rnase-hii
#8
Tianrong Hang, Xiaozhen Zhang, Minhao Wu, Chengliang Wang, Shenglong Ling, Ling Xu, Qingguo Gong, Changlin Tian, Xuan Zhang, Jianye Zang
RNase HII exists ubiquitously in organisms and functions as a monomer in prokaryotes. We determined the crystal structure of Staphylococcus aureus RNase HII (Sa-RNase HII), which displays a novel dimer conformation, with the active site of each monomer covered by the other one. Both small-angle X-ray scattering and gel-filtration analysis confirmed that Sa-RNase HII exists as a homodimer in solution. Enzymatic analysis revealed that the "self-inhibited" dimeric form is catalytically active. Furthermore, continuous-wave electron paramagnetic resonance experiments clarified that the Sa-RNase HII dimer undergoes a large conformational change upon substrate binding, but remains a dimer to catalyze the reaction...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005876/the-role-of-lncrna-xist-mir-211-axis-in-modulating-the-proliferation-and-apoptosis-of-osteoarthritis-chondrocytes-through-cxcr4-and-mapk-signaling
#9
Lei Li, Guohua Lv, Bing Wang, Lei Kuang
Long noncoding RNAs (lncRNAs) participate in multiple diverse diseases, including osteoarthritis (OA). Here, we explored the role of lncRNA XIST in OA and identified the potential molecular mechanisms. The expression of XIST in cartilage samples in patients with OA was significantly upregulated. XIST knockdown remarkably suppressed IL-1β-suppressed OA chondrocyte proliferation while promoted IL-1β-induced cell apoptosis. By employing online tools, miRNAs related to CXCR4, a major contributor to chondrocyte apoptosis, and XIST were selected...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005875/characterization-of-diterpene-synthase-genes-in-the-wild-rice-species-oryza-brachyatha-provides-evolutionary-insight-into-rice-phytoalexin-biosynthesis
#10
Tomonobu Toyomasu, Chisato Goda, Arisa Sakai, Koji Miyamoto, Matthew R Shenton, Shiho Tomiyama, Wataru Mitsuhashi, Hisakazu Yamane, Nori Kurata, Kazunori Okada
Cultivated rice (Oryza sativa; Os) produces a variety of labdane-related diterpenoids; not only phytohormone gibberellins (GAs) but also phytoalexins for defense including phytocassanes, momilactones and oryzalexins. Their carbon skeleton diterpenes are constructed from geranylgeranyl diphosphate via ent-copalyl diphosphate (ent-CDP) or its diastereomer syn-CDP. These two-step reactions are successively catalyzed by homologs of the two diterpene synthases, ent-CDP synthase (ent-CPS) and ent-kaurene synthase (KS) that are responsible for the biosynthesis of GAs; e...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005874/palmitate-induces-lipoapoptosis-in-schwann-cells-through-ros-generation-mediated-stamp2-downregulation
#11
Sung Won Lee, Joon Beom Park, Hwa Jin Kim, Hye Young Kim, Sang Yeob Lee, Won Tae Chung, Yoon Kyung Shin, Hwan Tae Park, Jee Hyun Rho, Young Hyun Yoo
Free fatty acids (FFAs) are considered the principal inducers of lipotoxicity, leading to cell dysfunction and/or cell death. Lipotoxicity in Schwann cells (SCs) damages neurons, which may be associated with peripheral neuropathies and axon degeneration. However, the molecular mechanism by which FFAs exert lipotoxicity in SCs remains to be established. In the present study, we demonstrate that palmitate exerts lipotoxicity in SCs through apoptosis and that palmitate-induced lipotoxicity in SCs is mediated through reactive oxygen species (ROS) generation...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005873/chd1p-recognizes-h3k36ac-to-maintain-nucleosome-positioning-near-the-transcription-start-site
#12
Hyunhee Kim, Hyelim Jo, Hogyu David Seo, Hee-Sung Park, Daeyoup Lee
In Saccharomyces cerevisiae, the ATP-dependent chromatin remodeler, Chd1p, globally affects nucleosome positioning at coding regions, where nucleosomes are specifically and directionally aligned with respect to the transcription start site (TSS). Various auxiliary domains of remodelers play critical roles by performing specialized functions that are unique to the type of remodeler. Here, we report that yeast Chd1p directly binds to acetylated histone H3K36 (H3K36Ac) via its chromodomain, and that H3K36Ac stimulates the nucleosome sliding activity of Chd1p in vitro...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005872/the-fgf2-aptamer-inhibits-the-growth-of-fgf2-fgfr-pathway-driven-lung-cancer-cells
#13
Junko Hamamoto, Hiroyuki Yasuda, Yosuke Nonaka, Masatoshi Fujiwara, Yoshikazu Nakamura, Kenzo Soejima, Tomoko Betsuyaku
Cancers, including lung cancer, are a leading cause of death worldwide. To overcome this deadly disease, multiple modality inhibitors have been developed. These include cytotoxic agents, molecular targeted small molecules, such as tyrosine kinase inhibitors, and neutralizing antibodies. An aptamer is a short single-stranded nucleic acid molecule that is selected in vitro from a large random sequence library based on its high and specific affinity to a target molecule. Aptamers can be applied to therapeutics of various types of diseases, including cancer, due to their strong and specific neutralizing activities...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30005870/rab3ip-interacts-with-ssx2-and-enhances-the-invasiveness-of-gastric-cancer-cells
#14
Haotang Ren, Zhijun Xu, Weihong Guo, Zhenwei Deng, Xueqiao Yu
RAB3A interacting protein (Rab3IP) has been determined to be involved in cancer progression; however, its expression pattern and function in gastric cancer remain unknown. The aim of this study was to determine the association between Rab3IP and gastric cancer, in addition to its functional role in this disease. Overexpression of Rab3IP in gastric cancer was verified at both transcriptional and translational levels. Analysis of clinical data indicated its role as an independent risk factor for survival. Cellular studies showed that Rab3IP could induce an aggressive phenotype in gastric cancer cells and that its expression was correlated with markers of the epithelial-mesenchymal transition (EMT)...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30001807/autophagy-impairment-in-pancreatic-acinar-cells-causes-zymogen-granule-accumulation-and-pancreatitis
#15
Kiyoshi Iwahashi, Hayato Hikita, Yuki Makino, Minoru Shigekawa, Kenji Ikezawa, Teppei Yoshioka, Takahiro Kodama, Ryotaro Sakamori, Tomohide Tatsumi, Tetsuo Takehara
Basal autophagy degrades many kinds of proteins and organelles to maintain quality and plays important roles in cellular homeostasis. However, the impact of basal autophagy on zymogen granules in pancreatic acinar cells is unknown. In the present study, we examined the influence of autophagy impairment in acinar cells on zymogen granules and homeostasis of the pancreas, using mice with pancreas-specific autophagy impairment (Pdx1-Cre+/- Atg7fl/fl mice). The number of zymogen granules in acinar cells from these mice did not differ from that in acinar cells from their wild-type littermates at 3 weeks of age...
July 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30001809/identification-of-antibodies-against-extracellular-matrix-proteins-in-human-osteoarthritis
#16
Johannes Ruthard, Gabriele Hermes, Ursula Hartmann, Gerhard Sengle, Georg Pongratz, Benedikt Ostendorf, Matthias Schneider, Stefan Höllriegl, Frank Zaucke, Raimund Wagener, Thomas Streichert, Andreas R Klatt
We investigated the presence of autoantibodies against the extracellular matrix proteins thrombospondin-4 (TSP-4), cartilage oligomeric matrix protein (COMP), C-type lectin domain family 3 member A (CLEC3A), collagen II, collagen VI, matrilin-3, and fibrillin-2 in the serum of osteoarthritis (OA) patients. We compared those results with the presence of such antibodies in rheumatoid arthritis (RA) patients and in healthy donors (HD). Our study examines whether antibodies against extracellular proteins can be used as potential biomarkers to support the clinical diagnosis of OA...
July 9, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30001808/ntrlk5-a-novel-rlk-like-protein-kinase-from-nitotiana-tobacum-positively-regulates-drought-tolerance-in-transgenic-arabidopsis
#17
Guoyun Xu, Mingjuan Li, Hui Zhang, Qiansi Chen, Lifeng Jin, Qingxia Zheng, Pingping Liu, Peijian Cao, Xia Chen, Niu Zhai, Huina Zhou
Receptor-like protein kinase (RLKs) plays pivotal roles in plant growth and development as well as stress responses. However, little is known about the function of RLKs in Nitotiana tobacum. In the present study, we present data on NtRLK5, a novel RLK-like gene isolated from Hongda (Nitotiana tobacum L.). Expression profile analysis revealed that NtRLK5 was strongly induced by drought and salt stresses. Transient expression of NtRLK5-GFP fusion protein in protoplast showed that NtRLK5 was localized to plasma membrane...
July 9, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29969632/faecal-microrna-as-a-biomarker-of-the-activity-and-prognosis-of-inflammatory-bowel-diseases
#18
Yahong Ji, Xiaoli Li, Ying Zhu, Na Li, Nana Zhang, Min Niu
Reasons underlying the individual differences in the clinical manifestations of inflammatory bowel diseases (IBD) and the mechanism by which the host screens the intestinal microbiota remain unclear. The presence of miRNA in faeces might be a potential clue into differences in gut microbiota among these patients. In this study, we analysed the differences in miRNA levels in faecal samples from 117 patients diagnosed with IBD. There was a significant difference in faecal miRNAs between healthy subjects and those with inactive IBD...
June 30, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29969631/circrna-circ-banp-mediated-mir-503-larp1-signaling-contributes-to-lung-cancer-progression
#19
Jingquan Han, Guibin Zhao, Xiao Ma, Qing Dong, Hang Zhang, Yue Wang, Jian Cui
Recently, circular RNAs (circRNAs) attract much attention due to their potential vital functions in multiple human diseases, including cancer. circ-BANP has been reported to modulate colorectal cancer growth. Nevertheless, the relationship between circ-BANP and lung cancer requires to be investigated. In this study, we found circ-BANP was overexpressed in lung cancer tissues. Higher circ-BANP expression was associated with lower survival rate. Moreover, silencing circ-BANP markedly inhibited proliferation, migration and invasion of lung cancer cells in vitro and impaired tumor propagation in vivo...
June 30, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29969630/mir-410-3p-promotes-prostate-cancer-progression-via-regulating-pten-akt-mtor-signaling-pathway
#20
Yuelong Zhang, Dahong Zhang, Jia Lv, Shuai Wang, Qi Zhang
Prostate cancer has become one of commonest urologic tumors in male. In recent years, miRNAs are continually attracting attentions of researchers for their special regulatory function in human cancers. Previous study has revealed that miR-410 acts as a biomarker for the diagnosis of prostate cancer. Whereas, the specific biological function of miR-410-3p in prostate cancer remains unknown. The aim of this study is to explore the function and molecular mechanism of miR-410-3p in prostate cancer. The high expression of miR-410-3p was examined in prostate cancer tissues and cell lines by qRT-PCR...
June 30, 2018: Biochemical and Biophysical Research Communications
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