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https://www.readbyqxmd.com/read/28515294/deletion-of-the-vaccinia-b1-kinase-reveals-essential-functions-of-this-enzyme-complemented-partly-by-the-homologous-cellular-kinase-vrk2
#1
Annabel T Olson, Amber B Rico, Zhigang Wang, Gustavo Delhon, Matthew S Wiebe
The vaccinia B1 kinase is highly conserved among poxviruses and is essential for the viral lifecycle. B1 exhibits a remarkable degree of similarity to VRKs, a family of cellular kinases, suggesting that the viral enzyme has evolved to mimic VRK activity. Indeed, B1 and VRKs have been demonstrated to target a shared substrate, the DNA binding protein BAF, elucidating a signaling pathway important for both mitosis and the antiviral response. In this study, we further characterize the role of B1 during vaccinia infection to gain novel insights into its regulation and integration with cellular signaling pathways...
May 17, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28472737/occurrence-and-fate-of-benzotriazoles-uv-filters-in-a-typical-residential-wastewater-treatment-plant-in-harbin-china
#2
Xue Zhao, Zi-Feng Zhang, Lei Xu, Li-Yan Liu, Wei-Wei Song, Fu-Jie Zhu, Yi-Fan Li, Wan-Li Ma
Benzotriazoles (BTs) UV filters are widely used as ultraviolet absorbents for our daily products, which received increasing attention in the past decades. Residential wastewater treatment plant (WWTP) is both an important sink for wastewater and a key pollution source for receiving water for these chemicals. In this study, pretreatment and gas chromatography-tandem mass spectrometry analysis method were developed to determine the occurrence and fate of 9 BTs UV filters in wastewater and sludge from the WWTP with anaerobic-oxic treatment process (A/O) and biological aerated filter treatment process (BAF)...
May 1, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28468284/anti-inflammatory-effects-sar-and-action-mechanism-of-monoterpenoids-from-radix-paeoniae-alba-on-lps-stimulated-raw-264-7-cells
#3
Xiaoxu Bi, Li Han, Tiange Qu, Yu Mu, Peipei Guan, Xiaodan Qu, Zhanyou Wang, Xueshi Huang
Nine monoterpenoids from Radix Paeoniae Alba, including paeoniflorin derivatives, paeoniflorin (PF), 4-O-methylpaeoniflorin (MPF), 4-O-methylbenzoylpaeoniflorin (MBPF); paeonidanin derivatives, paeonidanin (PD), paeonidanin A (PDA), albiflorin derivatives, albiflorin (AF), benzoylalbiflorin (BAF), galloylalbiflorin (GAF), and debenzoylalbiflorin (DAF), were obtained in our previous phytochemistry investigations. Their anti-inflammatory effects were determined in the present study. The expression and production of pro-inflammatory cytokines in lipopolysaccharides (LPS)-stimulated RAW 264...
April 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28458198/bioaccumulation-and-biomagnification-of-emerging-bisphenol-analogues-in-aquatic-organisms-from-taihu-lake-china
#4
Qiang Wang, Meng Chen, Guoqiang Shan, Pengyu Chen, Shuo Cui, Shujun Yi, Lingyan Zhu
Due to regulations on bisphenol A (BPA) in many countries, a variety of bisphenol analogues are being widely manufactured and applied. However, there is a big knowledge gap on bioaccumulation and biomagnification of these emerging bisphenols in aquatic organisms. The bioaccumulation and magnification of nine bisphenol analogues in aquatic organisms at different trophic levels collected from Taihu Lake, China, were evaluated. The total concentrations of the nine bisphenols in the lake waters were in the range of 49...
April 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454732/fluvastatin-prevents-lung-adenocarcinoma-bone-metastasis-by-triggering-autophagy
#5
Zuozhang Yang, Zhenyi Su, Judy Park DeWitt, Lin Xie, Yongbin Chen, Xiaojuan Li, Lei Han, Dongqi Li, Junfeng Xia, Ya Zhang, Yihao Yang, Congguo Jin, Jing Zhang, Su Li, Kun Li, Zhiping Zhang, Xin Qu, Zewei He, Yanjin Chen, Yan Shen, Mingyan Ren, Zhongqin Yuan
Bone is one of the most preferred sites of metastasis in lung cancer. Currently, bisphosphonates and denosumab are major agents for controlling tumor-associated skeletal-related events (SREs). However, both bisphosphonates and denosumab significantly increase the risk for jaw osteonecrosis. Statins, 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors and the most frequently prescribed cholesterol-lowering agents, have been reported to inhibit tumor progression and induce autophagy in cancer cells...
April 11, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28446594/pioneering-ebf2-remodels-the-brown-fat-chromatin-landscape
#6
Jiexin Wang, Peter Tontonoz
In this issue of Genes & Development, Shapira and colleagues (pp. 660-673) outline mechanisms by which the brown fat transcription factor early B-cell factor 2 (EBF2) selectively activates brown lineage-specific gene expression. The investigators show that EBF2 interacts with and recruits a tissue-specific BAF chromatin remodeling complex to brown fat gene enhancers, thereby regulating chromatin accessibility. Their findings provide important insight into epigenetic regulation of adipocyte fate and thermogenic gene expression...
April 1, 2017: Genes & Development
https://www.readbyqxmd.com/read/28438634/structural-insights-into-baf47-and-baf155-complex-formation
#7
Li Yan, Si Xie, Yongming Du, Chengmin Qian
Mammalian BAF complexes are a subfamily of SWI/SNF ATP-dependent chromatin remodelers that dynamically modulate chromatin structure to regulate fundamental cellular processes including gene transcription, cell cycle control, and DNA damage response. So far, many distinct BAF complexes have been identified with polymorphic assemblies of up to 15 subunits from 29 genes. The evolutionarily conserved BRG1/BRM, BAF47, and BAF155/BAF170 form a stable complex that carries out essential chromatin remodeling activity and therefore have been regarded as the core components of BAF complex...
April 21, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28438527/the-baf-brg1-brm-associated-factor-chromatin-remodeling-complex-exhibits-ethanol-sensitivity-in-fetal-neural-progenitor-cells-and-regulates-transcription-at-the-mir-9-2-encoding-gene-locus
#8
Sasha G Burrowes, Nihal A Salem, Alexander M Tseng, Sridevi Balaraman, Marisa R Pinson, Cadianna Garcia, Rajesh C Miranda
Fetal alcohol spectrum disorders are a leading cause of intellectual disability worldwide. Previous studies have shown that developmental ethanol exposure results in loss of microRNAs (miRNAs), including miR-9, and loss of these miRNAs, in turn, mediates some of ethanol's teratogenic effects in the developing brain. We previously found that ethanol increased methylation at the miR-9-2 encoding gene locus in mouse fetal neural stem cells (NSC), advancing a mechanism for epigenetic silencing of this locus and consequently, miR-9 loss in NSCs...
May 2017: Alcohol
https://www.readbyqxmd.com/read/28432952/removal-of-antibiotics-from-piggery-wastewater-by-biological-aerated-filter-system-treatment-efficiency-and-biodegradation-kinetics
#9
Jun Chen, You-Sheng Liu, Jin-Na Zhang, Yong-Qiang Yang, Li-Xin Hu, Yuan-Yuan Yang, Jian-Liang Zhao, Fan-Rong Chen, Guang-Guo Ying
This study aimed to investigate the removal efficiency and mechanism for antibiotics in swine wastewater by a biological aerated filter system (BAF system) in combination with laboratory aerobic and anaerobic incubation experiments. Nine antibiotics including sulfamonomethoxine, sulfachloropyridazine, sulfamethazine, trimethoprim, norfloxacin, ofloxacin, lincomycin, leucomycin and oxytetracycline were detected in the wastewater with concentrations up to 192,000ng/L. The results from this pilot study showed efficient removals (>82%) of the conventional wastewater pollutants (BOD5, COD, TN and NH3-N) and the detected nine antibiotics by the BAF system...
April 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28430134/on-the-morphology-of-group-ii-metal-fluoride-nanocrystals-at-finite-temperature-and-partial-pressure-of-hf
#10
Zeinab Kaawar, Stefan Mahn, Erhard Kemnitz, Beate Paulus
We have investigated the bulk and surface properties of the group II metal fluorides CaF 2 , SrF 2 and BaF 2 using periodic density functional theory (DFT) calculations and surface thermodynamics. Our bulk results show that the best agreement with experiment is achieved with the B3LYP and PBE functionals. We determined the relative importance of the low index surfaces in vacuum and found that an fluoride microcrystal exposes only the (111) surface in which the undercoordinated cations are sevenfold coordinated...
April 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28428261/ebf2-transcriptionally-regulates-brown-adipogenesis-via-the-histone-reader-dpf3-and-the-baf-chromatin-remodeling-complex
#11
Suzanne N Shapira, Hee-Woong Lim, Sona Rajakumari, Alexander P Sakers, Jeff Ishibashi, Matthew J Harms, Kyoung-Jae Won, Patrick Seale
The transcription factor early B-cell factor 2 (EBF2) is an essential mediator of brown adipocyte commitment and terminal differentiation. However, the mechanisms by which EBF2 regulates chromatin to activate brown fat-specific genes in adipocytes were unknown. ChIP-seq (chromatin immunoprecipitation [ChIP] followed by deep sequencing) analyses in brown adipose tissue showed that EBF2 binds and regulates the activity of lineage-specific enhancers. Mechanistically, EBF2 physically interacts with the chromatin remodeler BRG1 and the BAF chromatin remodeling complex in brown adipocytes...
April 1, 2017: Genes & Development
https://www.readbyqxmd.com/read/28419740/pulmonary-hypertension-associated-with-combined-fibrosing-mediastinitis-and-bronchial-anthracofibrosis-a-retrospective-analysis-in-a-single-chinese-hospital
#12
Yan Xu, Wenbing Xu, Yongjian Liu, Xinlun Tian, Kaifeng Xu, Juhong Shi, Mengzhao Wang, Baiqiang Cai, Min Peng
INTRODUCTION: Both fibrosing mediastinitis (FM) and bronchial anthracofibrosis (BAF) are unique diseases. The combined appearance of FM and BAF is extremely rare. OBJECTIVES: The aim of this study was to investigate the clinical features of patients with coexisting FM and BAF. METHOD: Between January 2003 and December 2015, a total of eight patients were diagnosed at the Peking Union Medical College Hospital as having combined FM and BAF. The clinical presentations, radiographic features, and bronchoscopic findings of the eight patients were reviewed...
April 17, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28418626/degradation-of-the-baf-complex-factor-brd9-by-heterobifunctional-ligands
#13
David Remillard, Dennis L Buckley, Joshiawa Paulk, Gerard L Brien, Matthew Sonnett, Hyuk-Soo Seo, Shiva Dastierdi, Martin Wühr, Sirano Dhe-Paganon, Scott A Armstrong, James E Bradner
The bromodomain-containing protein BRD9, a subunit of the human BAF (SWI/SNF) nucleosome remodeling complex, has emerged as an attractive therapeutic target in cancer. Despite the development of chemical probes targeting the BRD9 bromodomain, there is a limited understanding of BRD9 function beyond acetyl-lysine recognition. We have therefore created the first BRD9-directed chemical degraders, through iterative design and testing of heterobifunctional ligands that bridge the BRD9 bromodomain and the cereblon E3 ubiquitin ligase complex...
April 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28416631/mutation-of-neuron-specific-chromatin-remodeling-subunit-baf53b-rescue-of-plasticity-and-memory-by-manipulating-actin-remodeling
#14
Annie Vogel Ciernia, Enikö A Kramár, Dina P Matheos, Robbert Havekes, Thekla J Hemstedt, Christophe N Magnan, Keith Sakata, Ashley Tran, Soraya Azzawi, Alberto Lopez, Richard Dang, Weisheng Wang, Brian Trieu, Joyce Tong, Ruth M Barrett, Rebecca J Post, Pierre Baldi, Ted Abel, Gary Lynch, Marcelo A Wood
Recent human exome-sequencing studies have implicated polymorphic Brg1-associated factor (BAF) complexes (mammalian SWI/SNF chromatin remodeling complexes) in several intellectual disabilities and cognitive disorders, including autism. However, it remains unclear how mutations in BAF complexes result in impaired cognitive function. Post-mitotic neurons express a neuron-specific assembly, nBAF, characterized by the neuron-specific subunit BAF53b. Subdomain 2 of BAF53b is essential for the differentiation of neuronal precursor cells into neurons...
May 2017: Learning & Memory
https://www.readbyqxmd.com/read/28408647/composition-and-function-of-mammalian-swi-snf-chromatin-remodeling-complexes-in-human-disease
#15
John L Pulice, Cigall Kadoch
Mammalian SWI/SNF (BAF) chromatin remodeling complexes play critical roles in maintaining chromatin architecture and gene expression. Genomic sequencing efforts over the past several years have unveiled a major role for these complexes in the development of human cancer as well as neurologic disease, prompting the need to interrogate underlying mechanisms and to develop new methods to comprehensively understand mSWI/SNF complex function. Here we discuss the emerging insights from genetic, biochemical, and functional genomic studies in the field and suggest approaches toward further basic investigations, as well as therapeutic targeting of chromatin remodeling machinery...
April 13, 2017: Cold Spring Harbor Symposia on Quantitative Biology
https://www.readbyqxmd.com/read/28401388/accumulation-of-heavy-metal-in-scalp-hair-of-people-exposed-in-beijing-sewage-discharge-channel-sewage-irrigation-area-in-tianjin-china
#16
Zuwei Wang, Xiaoman Yu, Mingshuo Geng, Zilu Wang, Qianqian Wang, Xiangfeng Zeng
Heavy metal concentrations in soil, wheat, and scalp hair exposed to Beijing sewage discharge channel sewage irrigation area (BSIA) in Tianjin were studied to evaluate the influence of sewage irrigation. Results showed that the continuous application of wastewater has led to an accumulation of heavy metals in the soil, with 55.2 and 8.62% of soil samples accumulating Cd and Zn, respectively, at concentrations exceeding the permissible limits in China. Concentrations of heavy metals in wheat grain from BSIA were higher than these from the clean water irrigation area by 63...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28391084/mammalian-swi-snf-complexes-in-cancer-emerging-therapeutic-opportunities
#17
REVIEW
Roodolph St Pierre, Cigall Kadoch
Mammalian SWI/SNF (BAF) chromatin remodeling complexes orchestrate a diverse set of chromatin alterations which impact transcriptional output. Recent whole-exome sequencing efforts have revealed that the genes encoding subunits of mSWI/SNF complexes are mutated in over 20% of cancers, spanning a wide range of tissue types. The majority of mutations result in loss of subunit protein expression, implicating mSWI/SNF subunits as tumor suppressors. mSWI/SNF-deficient cancers remain a therapeutic challenge, owing to a lack of potent and selective agents which target complexes or unique pathway dependencies generated by mSWI/SNF subunit perturbations...
April 6, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28388007/aberrant-intracellular-metabolism-of-t-dm1-confers-t-dm1-resistance-in-her2-positive-gastric-cancer-cells
#18
Hongbin Wang, Wenqian Wang, Yongping Xu, Yong Yang, Xiaoyan Chen, Haitian Quan, Liguang Lou
T-DM1 (Kadcyla), an antibody-drug conjugate (ADC) consisting of HER2-targeted monoclonal antibody trastuzumab linked to anti-microtubule agent mertansine (DM1), has been approved for the treatment of HER2-positive metastatic breast cancer. To date, acquired resistance arises to be a major obstacle to T-DM1 treatment, and mechanisms remain incompletely understood. In the present study, we established a T-DM1-resistant N87-KR cell line from HER2-positive N87 gastric cancer cells to investigate mechanisms of acquired resistance and develop strategies for overcoming it...
April 7, 2017: Cancer Science
https://www.readbyqxmd.com/read/28387518/method-development-for-the-determination-of-total-fluorine-in-foods-by-tandem-inductively-coupled-plasma-mass-spectrometry-with-a-mass-shift-strategy
#19
Wei Guo, Lanlan Jin, Shenghong Hu, Qinghai Guo
A method for total F determination in food and tea samples based on a mass-shift strategy using tandem inductively coupled plasma quadrupole mass spectrometry (ICP-MS-MS) was developed. This method consists of four steps: (1) conversion of the hardly ionized F atoms to BaF(+) via ICP, (2) use of the first quadrupole (Q1, set at 157) to ensure only the m/z 157 ions (i.e., (138)Ba(19)F(+), (157)Gd(+), and (138)Ba(18)OH(+)) enter the reaction cell (RC), (3) shifting (138)Ba(19)F(+) to a new mass (138)Ba(19)F((14)NH3)3(+) by reacting with NH3 in RC to avoid the interfering ions (i...
April 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28381560/the-chromatin-remodeling-subunit-baf200-promotes-homology-directed-dna-repair-and-regulates-distinct-chromatin-remodeling-complexes
#20
Rodrigo O de Castro, Luciana Previato, Victor Goitea, Anna Felberg, Michael F Guiraldelli, Adrian Filiberti, Roberto J Pezza
The efficiency and type of pathway chosen to repair DNA double-strand breaks (DSBs) are critically influenced by the nucleosome packaging and the chromatin architecture surrounding the DSBs. The Swi/Snf (PBAF and BAF) chromatin-remodeling complexes contribute to DNA damage-induced nucleosome remodeling, but the mechanism by which it contributes to this function is poorly understood. Herein, we report how the Baf200 (Arid2) PBAF-defining subunit regulates DSB repair. We used cytological and biochemical approaches to show that Baf200 plays an important function by facilitating homologous recombination-dependent processes, such as recruitment of Rad51 (a key component of homologous recombination) to DSBs, homology-directed repair, and cell survival after DNA damage...
April 5, 2017: Journal of Biological Chemistry
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