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https://www.readbyqxmd.com/read/27926504/the-immunomodulatory-effects-of-tnf-%C3%AE-inhibitors-on-human-th17-cells-via-ror%C3%AE-t-histone-acetylation
#1
Yi-Ching Lin, Yu-Chih Lin, Cheng-Chin Wu, Ming-Yii Huang, Wen-Chan Tsai, Chih-Hsing Hung, Po-Lin Kuo
The presence of interleukin (IL)-17-related cytokines correlates with rheumatoid arthritis (RA) pathogenesis. Epigenetic modifications, including histone acetylation, regulate gene expression in RA pathogenesis. Tumour necrosis factor-alpha (TNF-α) inhibitors such as etanercept and adalimumab, represent a breakthrough in RA treatment. We aimed to investigate the effects of etanercept and adalimumab on human Th17-polarized cells and the possible intracellular regulators of these effects, including the Th17-specific transcription factors signal transducer, activator of transcription 3 (STAT3), retinoid-related orphan receptor γ-T (RORγt) and epigenetic modification...
December 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/27909437/differentially-methylated-dna-regions-in-monozygotic-twin-pairs-discordant-for-rheumatoid-arthritis-an-epigenome-wide-study
#2
Anders J Svendsen, Kristina Gervin, Robert Lyle, Lene Christiansen, Kirsten Kyvik, Peter Junker, Christian Nielsen, Gunnar Houen, Qihua Tan
OBJECTIVES: In an explorative epigenome-wide association study (EWAS) to search for gene independent, differentially methylated DNA positions and regions (DMRs) associated with rheumatoid arthritis (RA) by studying monozygotic (MZ) twin pairs discordant for RA. METHODS: Genomic DNA was isolated from whole blood samples from 28 MZ twin pairs discordant for RA. DNA methylation was measured using the HumanMethylation450 BeadChips. Smoking, anti-cyclic citrullinated peptide antibodies, and immunosuppressive treatment were included as covariates...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27909056/interferons-induce-expression-of-samhd1-in-monocytes-through-downregulation-of-mir-181a-and-mir-30a
#3
Maximilan Riess, Nina V Fuchs, Adam Idica, Matthias Hamdorf, Egbert Flory, Irene Munk Pedersen, Renate König
SAMHD1 is a phosphohydrolase maintaining cellular dNTP homeostasis but also acts as a critical regulator in innate immune responses due to its antiviral activity and association with autoimmune disease leading to aberrant activation of interferon. SAMHD1 expression is differentially regulated by interferon in certain primary cells, but the underlying mechanism is not understood. Here, we report a detailed characterization of the promotor region, the 5' and 3' untranslated region (UTR) of SAMHD1, and the mechanism responsible for the cell-type dependent upregulation of SAMHD1 protein by interferon...
December 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27895202/the-lbd12-1-transcription-factor-suppresses-apical-meristem-size-by-repressing-argonaute-10-expression
#4
Weiwei Ma, Fuqing Wu, Peike Sheng, Xiaole Wang, Zhe Zhang, Kunneng Zhou, Huan Zhang, Jinlong Hu, Qibing Lin, Zhijun Cheng, Jiulin Wang, Shanshan Zhu, Xin Zhang, Xiuping Guo, Haiyang Wang, Chuanyin Wu, Jianmin Wan
The shoot apical meristem (SAM) consists of a population of multipotent cells that generate all aerial structures and regenerates itself. SAM maintenance and lateral organ development are regulated by several complex signaling pathways, in which the Argonaute gene mediated pathway plays a key role. One Argonaute gene, AGO10, functions as a miRNA locker that attenuates miR165/166 activity and positively regulates shoot apical meristem development, but little is known about when and how AGO10 is regulated at the transcriptional level...
November 28, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27886392/deregulated-expression-of-ezh2-in-congenital-brainstem-disconnection
#5
P G Barth, E Aronica, S Fox, K Fluiter, M A J Weterman, A Poretti, D C Miller, E Boltshauser, B Harding, M Santi, F Baas
Congenital brainstem disconnection (CBSD) is an enigmatic embryo-fetal defect presenting as (sub)total absence of a segment between mesencephalon and lower brainstem. Rostro-caudal limits of the defect vary while the basal pons is always involved and the cerebellum is globally hypoplastic. A recent update and review[1] lists 14 cases, including 3 brain autopsy studies[1-3]. Necrosis and glial- or inflammatory reactions were absent. Inferior olivary nuclei were small or absent, pontine nuclei depleted, and the cerebellar dentate nuclei dysplastic...
November 25, 2016: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/27883234/stereospecific-synthesis-of-fluoroalkenes-by-silver-mediated-fluorination-of-functionalized-alkenylstannanes
#6
Alois Fürstner, Heiko Sommer
The known procedures for the conversion of alkenylstannanes into the corresponding fluoroalkenes suffer from largely variable yields and a limited compatibility with functional groups; most notably, protodestannation becomes a serious issue whenever protic sites are present in the substrate. Outlined in this paper is a convenient alternative with a much improved application profile, which is largely unperturbed by free alcohols and amides of all sorts. Key to success is the use of F-TEDA-PF6 in combination with non-hygroscopic and bench-stable silver phosphinate (AgOP(O)Ph2) that acts as an essentially neutral, non-nucleophilic promotor and effective tin-scavenger at the same time...
November 24, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27882471/fra-1-regulates-the%C3%A2-expression-of-hmga1-%C3%A2-which-is-associated-with-a-poor-prognosis-in-human-esophageal-squamous-cell-carcinoma
#7
Takeshi Toyozumi, Isamu Hoshino, Masahiko Takahashi, Akihiro Usui, Yasunori Akutsu, Naoyuki Hanari, Kentaro Murakami, Masayuki Kano, Naoki Akanuma, Hiroshi Suitoh, Yasunori Matsumoto, Nobuhumi Sekino, Aki Komatsu, Hisahiro Matsubara
BACKGROUND: The expression of Fos-related antigen 1 (Fra-1) affects tumor progression, migration, and invasion. In this study, we identified the genes regulated by Fra-1 in esophageal squamous cell carcinoma (ESCC). METHODS: We constructed Fra-1 knockdown models via the transfection of small interfering RNA (siRNA) into ESCC cell lines (TE10, TE11). The expression levels of the genes in the knockdown models were analyzed using a microarray and a Biobase Upstream Analysis, while the expression levels of the candidate genes in the primary tumors of surgical specimens obtained from ESCC patients were determined using real-time polymerase chain reaction (PCR) and immunohistochemical staining...
November 23, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27871161/helicobacter-pylori-eradication-modulates-aberrant-cpg-island-hypermethylation-in-gastric-carcinogenesis
#8
Jeongmin Choi, Sang Gyun Kim, Byeong Gwan Kim, Seong Joon Koh, Ji Won Kim, Kook Lae Lee
Background/Aims: Helicobacter pylori infection induces aberrant DNA methylation in gastric mucosa. We evaluated the long-term effect of H. pylori eradication on promotor CpG island hypermethylation in gastric carcinogenesis. Methods: H. pylori-positive patients with gastric adenoma or early gastric cancer who underwent endoscopic resection were enrolled. According to H. pylori eradication after endoscopic resection, the participants were randomly assigned to H. pylori eradication or non-eradication group...
November 25, 2016: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/27871062/unmasking-ultradian-rhythms-in-gene-expression
#9
Daan R van der Veen, Menno P Gerkema
Biological oscillations with an ultradian time scale of 1 to several hours include cycles in behavioral arousal, episodic glucocorticoid release, and gene expression. Ultradian rhythms are thought to have an extrinsic origin because of a perceived absence of ultradian rhythmicity in vitro and a lack of known molecular ultradian oscillators. We designed a novel, non-spectral-analysis method of separating ultradian from circadian components and applied it to a published gene expression dataset with an ultradian sampling resolution...
November 8, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27866642/genetic-susceptibility-to-gilbert-s-syndrome-in-a-valencian-population-efficacy-of-the-fasting-test
#10
A K Torres, N Escartín, C Monzó, C Guzmán, I Ferrer, C González-Muñoz, P Peña, V Monzó, G Marcaida, R Rodríguez-López
OBJECTIVE: To describe the populational distribution of the UGT1A1*28 variant (genetic variant code rs8175347) located in the promotor of the UGT gene and correlate its genotypes with the results of the fasting test, as well as its relationship with the biochemical disorder of Gilbert's syndrome (GS) in a Valencian population. PATIENTS AND METHODS: We studied the prevalence of the genotypes (TA)6/6 (TA)6/7 and (TA)7/7 of the deleterious variant rs8175347 in 144 patients with hyperbilirubinemia, 38 of whom had previously undergone the fasting test to diagnose GS, and in 150 control patients...
November 17, 2016: Revista Clínica Española
https://www.readbyqxmd.com/read/27865994/phenanthroline-bis-oxazole-ligands-for-binding-and-stabilization-of-g-quadruplexes
#11
João Medeiros-Silva, Aurore Guédin, Gilmar F Salgado, Jean-Louis Mergny, João A Queiroz, Eurico J Cabrita, Carla Cruz
BACKGROUND: G-quadruplexes (G4) are found at important genome regions such as telomere ends and oncogene promoters. One prominent strategy to explore the therapeutic potential of G4 is stabilized it with specific ligands. METHODS: We report the synthesis of new phenanthroline, phenyl and quinoline acyclic bisoxazole compounds in order to explore and evaluate the targeting to c-myc and human telomeric repeat 22AG G4 using FRET-melting, CD-melting, NMR, fluorescence titrations and FID assays...
November 17, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27859736/relationship-between-a163g-osteoprotegerin-gene-polymorphism-and-other-osteoporosis-parameters-in-roma-and-non-roma-postmenopausal-women-in-eastern-slovakia
#12
Marta Mydlárová Blaščáková, Ľudmila Blaščáková, Janka Poráčová, Jozef Mydlár, Janka Vašková, Jarmila Bernasovská, Iveta Boroňová, Eva Petrejčíková, Ivan Bernasovský
BACKGROUND: The study was focused on evaluating the possible correlation between biochemical, anthropometric, and genetic indicators of osteoporosis in postmenopausal women. The frequency of genotypes and differences in measured parameters were evaluated within two ethnically different groups of women in Slovakia. METHODS: The study included 310 postmenopausal women divided into non-Roma and Roma groups. Based on results of densitometry, they were divided into control groups and women with osteoporosis and osteopenia...
November 15, 2016: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/27857867/dna-methylation-signature-of-post-injury-neointimal-cells-during-vascular-remodeling-in-the-rat-balloon-injury-model
#13
Jendai Richards, Henry Ato Ogoe, Wenzhi Li, Oguljahan Babayewa, Wei Xu, Tameka Bythwood, Minerva Garcia-Barrios, Li Ma, Qing Song
Vascular smooth muscle cell (VSMC) accumulation in the neointimal is a common feature in vascular diseases such as atherosclerosis, transplant arteriosclerosis and restenosis. In this study, we isolated the neointimal cells and uninjured residential vascular smooth muscle cells by laser micro dissection and carried out single-cell whole-genome methylation sequencing. We also sequenced the bisulfite converted genome of circulating bone-marrow-derived cells such as peripheral blood mononuclear cells (PBMC) and bone marrow mononuclear cells (BMMC)...
July 2016: Molecular Biology (Los Angeles, Calif.)
https://www.readbyqxmd.com/read/27855197/efficacy-of-anti-vegf-vegfr-agents-on-animal-models-of-endometriosis-a-systematic-review-and-meta-analysis
#14
Shuangge Liu, Xiaoyan Xin, Teng Hua, Rui Shi, Shuqi Chi, Zhishan Jin, Hongbo Wang
BACKGROUND/OBJECTIVE: Vascular endothelial growth factor (VEGF) is the most important promotor of angiogenesis. Some studies indicate that anti-angiogenic agents that interfere with VEGF and its receptor (VEGFR), i.e., anti-VEGF/VEGFR agents, may be applied to treat endometriosis. This meta-analysis investigated the efficacy of anti-VEGF/VEGFR agents in animal models of endometriosis. METHODS: A systematic literature search was performed for animal studies published in English or Chinese from January 1995 to June 2016, which evaluated the effect of anti-VEGF/VEGFR agents on endometriosis...
2016: PloS One
https://www.readbyqxmd.com/read/27851806/5-hydroxymethylcytosine-precedes-loss-of-cpg-methylation-in-enhancers-and-genes-undergoing-activation-in-cardiomyocyte-maturation
#15
David K Kranzhöfer, Ralf Gilsbach, Björn A Grüning, Rolf Backofen, Thomas G Nührenberg, Lutz Hein
BACKGROUND: Cardiomyocytes undergo major changes in DNA methylation during maturation and transition to a non-proliferative state after birth. 5'-hydroxylation of methylated cytosines (5hmC) is not only involved in DNA loss of CpG methylation but is also thought to be an epigenetic mark with unique distribution and functions. Here, we sought to get insight into the dynamics of 5'-hydroxymethylcytosine in newborn and adult cardiomyocytes. METHODS: Cardiomyocyte nuclei from newborn and adult C57BL/6 mice were purified by flow cytometric sorting...
2016: PloS One
https://www.readbyqxmd.com/read/27826038/title-expression-of-glial-cbp-in-steroid-mediated-neuroprotection-in-male-and-female-zebra-finches
#16
Molly Klores, John T Moon, Kelli A Duncan
Under neurodegenerative conditions, reactive astrocytes upregulate both aromatase (estrogen synthase) as well as estrogen and androgen receptors. This increased steroidogenic signal promotes neuroprotection and repair by promoting neurogenesis and decreasing cell death, but also by modulating the release of inflammatory molecules. Thus, endocrine - immune cross-talk is an essential component of estrogen mediated neuroprotection following brain injury. However, the exact mechanisms underlying this cross-talk remains unknown...
November 5, 2016: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/27810895/a-novel-role-for-pyruvate-kinase-m2-as-a-corepressor-for-p53-during-the-dna-damage-response-in-human-tumor-cells
#17
Li Xia, Xin-Ran Wang, Xiao-Ling Wang, Su-Hui Liu, Xiao-Wei Ding, Guo-Qiang Chen, Ying Lu
The pyruvate kinase (PK) is a rate-limiting glycolytic enzyme catalyzing the dephosphorylation of phosphoenolpyruvate to pyruvate, yielding one molecule of ATP. The M2 isoform of PK (PKM2) is predominantly expressed in normal proliferating cells and tumors, and both metabolic and non-metabolic activities for the enzyme in promoting tumor cell proliferation have been identified. However, the exact roles of PKM2 in tumor initiation, growth and maintenance are not yet fully understood. Using immunoprecipitation-coupled LC-MS/MS in MCF7 cells exposed to DNA damaging agent, we report that the nuclear PKM2 interacts directly with P53 protein, a critical safeguard for genome stability...
November 3, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27798706/application-of-high-throughput-next-generation-sequencing-for-hla-typing-on-buccal-extracted-dna-results-from-over-10-000-donor-recruitment-samples
#18
Yuxin Yin, James H Lan, David Nguyen, Nicole Valenzuela, Ping Takemura, Yung-Tsi Bolon, Brianna Springer, Katsuyuki Saito, Ying Zheng, Tim Hague, Agnes Pasztor, Gyorgy Horvath, Krisztina Rigo, Elaine F Reed, Qiuheng Zhang
BACKGROUND: Unambiguous HLA typing is important in hematopoietic stem cell transplantation (HSCT), HLA disease association studies, and solid organ transplantation. However, current molecular typing methods only interrogate the antigen recognition site (ARS) of HLA genes, resulting in many cis-trans ambiguities that require additional typing methods to resolve. Here we report high-resolution HLA typing of 10,063 National Marrow Donor Program (NMDP) registry donors using long-range PCR by next generation sequencing (NGS) approach on buccal swab DNA...
2016: PloS One
https://www.readbyqxmd.com/read/27796570/regulating-unfolded-protein-response-activator-hac1p-for-production-of-thermostable-raw-starch-hydrolyzing-%C3%AE-amylase-in-pichia-pastoris
#19
Mengmeng Huang, Yanyun Gao, Xiangshan Zhou, Yuanxing Zhang, Menghao Cai
Unfolded protein response (UPR) usually happens when expressing heterologous proteins in high level, which may help cells to facilitate protein processing. Here, we evaluated the effects of the UPR activator HAC1p on a raw-starch hydrolyzing α-amylase (Gs4j-amyA), so as to improve heterologous production of the enzyme in Pichia pastoris. The gene (amyA) encoding Gs4j-amyA was first codon-optimized and expressed in P. pastoris under the control of the AOX1 promoter. A high gene dosage (12 copies) of amyA facilitated amylase expression which produced an enzyme activity of 305 U/ml...
October 28, 2016: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27779109/methylation-of-promoter-of-rbl1-enhances-the-radioresistance-of-three-dimensional-cultured-carcinoma-cells
#20
Dong Pan, Yaxiong Chen, Yarong Du, Zhenxin Ren, Xiaoman Li, Burong Hu
Three dimensional (3D) culture in vitro is a new cell culture model that more closely mimics the physiology features of the in vivo environment and is being used widely in the field of medical and biological research. It has been demonstrated that cancer cells cultured in 3D matrices are more radioresistant compared with cells in monolayer (2D). However, the mechanisms causing this difference remain largely unclear. Here we found that the cell cycle distribution and expression of cell cycle regulation genes in 3D A549 cells are different from the 2D...
October 13, 2016: Oncotarget
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