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Feng Zhang Broad

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https://www.readbyqxmd.com/read/28427921/enhancement-of-ethyl-s-4-chloro-3-hydroxybutanoate-production-at-high-substrate-concentration-by-in-situ-resin-adsorption
#1
Li-Feng Chen, Hai-Yang Fan, Yi-Ping Zhang, Wei Wei, Jin-Ping Lin, Dong-Zhi Wei, Hua-Lei Wang
Asymmetric reduction of ethyl 4-chloro-3-oxobutyrate (COBE) by carbonyl reductases presents an efficient way to produce Ethyl (S)-4-chloro-3-hydroxybutanoate ((S)-CHBE), an important chiral intermediate for the synthesis of hydroxymethylglutaryl-CoA reductase inhibitors such as Lipitor(®). In this study, an NADPH-dependent carbonyl reductase (SrCR) from Synechocystis sp. was characterized to demonstrate a broad substrate spectrum, and the highest activity (53.1U/mg protein) with COBE. To regenerate the cofactor NADPH, Bacillus subtilis glucose dehydrogenase was successfully coexpressed with SrCR...
April 17, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28402856/chd8-mutation-leads-to-autistic-like-behaviors-and-impaired-striatal-circuits
#2
Randall J Platt, Yang Zhou, Ian M Slaymaker, Ashwin S Shetty, Niels R Weisbach, Jin-Ah Kim, Jitendra Sharma, Mitul Desai, Sabina Sood, Hannah R Kempton, Gerald R Crabtree, Guoping Feng, Feng Zhang
Autism spectrum disorder (ASD) is a heterogeneous disease, but genetically defined models can provide an entry point to studying the molecular underpinnings of this disorder. We generated germline mutant mice with loss-of-function mutations in Chd8, a de novo mutation strongly associated with ASD, and demonstrate that these mice display hallmark ASD behaviors, macrocephaly, and craniofacial abnormalities similar to patient phenotypes. Chd8(+/-) mice display a broad, brain-region-specific dysregulation of major regulatory and cellular processes, most notably histone and chromatin modification, mRNA and protein processing, Wnt signaling, and cell-cycle regulation...
April 11, 2017: Cell Reports
https://www.readbyqxmd.com/read/28399408/eradication-of-tumors-through-simultaneous-ablation-of-cd276-b7-h3-positive-tumor-cells-and-tumor-vasculature
#3
Steven Seaman, Zhongyu Zhu, Saurabh Saha, Xiaoyan M Zhang, Mi Young Yang, Mary Beth Hilton, Karen Morris, Christopher Szot, Holly Morris, Deborah A Swing, Lino Tessarollo, Sean W Smith, Sylvia Degrado, Dmitry Borkin, Nareshkumar Jain, Julia Scheiermann, Yang Feng, Yanping Wang, Jinyu Li, Dean Welsch, Gary DeCrescenzo, Amit Chaudhary, Enrique Zudaire, Kimberly D Klarmann, Jonathan R Keller, Dimiter S Dimitrov, Brad St Croix
Targeting the tumor vasculature with antibody-drug conjugates (ADCs) is a promising anti-cancer strategy that in order to be realized must overcome several obstacles, including identification of suitable targets and optimal warheads. Here, we demonstrate that the cell-surface protein CD276/B7-H3 is broadly overexpressed by multiple tumor types on both cancer cells and tumor-infiltrating blood vessels, making it a potentially ideal dual-compartment therapeutic target. In preclinical studies CD276 ADCs armed with a conventional MMAE warhead destroyed CD276-positive cancer cells, but were ineffective against tumor vasculature...
April 10, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28398034/a-general-method-for-large-scale-fabrication-of-semiconducting-oxides-with-high-sers-sensitivity
#4
Xudong Zheng, Feng Ren, Shunping Zhang, Xiaolei Zhang, Hengyi Wu, Xingang Zhang, Zhuo Xing, Wenjing Qin, Yong Liu, Changzhong Jiang
Surface-enhanced Raman spectroscopy (SERS) is a versatile and powerful spectroscopic technique for substance analysis and detection. So far, the highest detection sensitivities have been realized on noble nanostructure substrates, which, however, are costly, unstable, and non-biocompatible. While semiconductor substrates could in principle be used, existing realizations have either resulted in substrates with low sensitivities or used methods that have poor technical control. Here we report a general and versatile method, based on ion irradiation and vacuum annealing, for fabricating large-scale reduced semiconducting oxide SERS substrates with high sensitivities...
April 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28371438/agranulocytosis-and-mixed-type-autoimmune-hemolytic-anemia-in-primary-sj%C3%A3-gren-s-syndrome-a-case-report-and-review-of-the-literature
#5
Lin Qiao, Jing Chen, Xiao-Mei Leng, Wen Zhang, Bing Han, Yan Zhao, Xiao-Feng Zeng
Primary Sjögren's syndrome (pSS) is a systemic autoimmune disease that presents with sicca symptoms of the main mucosal surfaces. Patients with pSS have a broad spectrum of laboratory features, such as cytopenias and hypergammaglobulinemia. Although hematological abnormalities are usually seen in pSS patients, agranulocytosis and autoimmune hemolytic anemia (AIHA) are rare. Here we describe a 40-year-old woman with pSS who developed both agranulocytosis and mixed-type AIHA. An increased risk of malignancies has also been reported in pSS patients with hematological changes...
December 2016: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28342305/metabolic-profiling-of-nuciferine-in-rat-urine-plasma-bile-and-feces-after-oral-administration-using-ultra-high-performance-liquid-chromatography-diode-array-detection-quadrupole-time-of-flight-mass-spectrometry
#6
Xiao-Lei Wu, Ming-Jiang Wu, Xin-Ze Chen, Hao-Ling Ma, Li-Qin Ding, Feng Qiu, Qin Pan, De-Qin Zhang
Nuciferine, a major alkaloid found in Nelumbinis Folium, exhibits a broad spectrum of bioactivities, such as antiobesity, anti-diabetes and anti-inflammatory. However, many research regarding nuciferine focused on the extraction, isolation and biological activity, the metabolism is not comprehensively explained in vivo. Thence, the present of this paper is to establish a simple method for speculating metabolites of nuciferine. A total of 15 metabolites were detected and tentatively identified through ultra high performance liquid chromatography-diode array detection-quadrupole time-of-flight mass spectrometry (UHPLC-DAD-QTOF-MS), including 7 new metabolites...
June 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28341737/abnormal-bone-marrow-microenvironment-contributes-to-hematopoietic-dysfunction-in-fanconi-anemia
#7
Yuan Zhou, Yongzheng He, Wen Xing, Peng Zhang, Hui Shi, Shi Chen, Jun Shi, Jie Bai, Steven D Rhodes, Fengkui Zhang, Jin Yuan, Xianlin Yang, Xiaofan Zhu, Yan Li, Helmut Hanenberg, Mingjiang Xu, Kent A Robertson, Weiping Yuan, Grzegorz Nalepa, Tao Cheng, D Wade Clapp, Feng-Chun Yang
Fanconi anemia is a complex heterogeneous genetic disorder with a high incidence of bone marrow failure, clonal evolution to acute myeloid leukemia and mesenchymal-derived congenital anomalies. Increasing evidence in Fanconi anemia and other genetic disorders points towards an interdependence of skeletal and hematopoietic development, yet the impact of the marrow microenvironment in the pathogenesis of the bone marrow failure in Fanconi anemia remains unclear. Here we demonstrated that mice with double knockout of both Fancc and Fancg gene had decreased bone formation at least partially due to impaired osteoblast differentiation from mesenchymal stem/progenitor cells...
March 24, 2017: Haematologica
https://www.readbyqxmd.com/read/28337274/decitabine-treatment-sensitizes-tumor-cells-to-t-cell-mediated-cytotoxicity-in-patients-with-myelodysplastic-syndromes
#8
Zheng Zhang, Qi He, Ying Tao, Juan Guo, Feng Xu, Ling-Yun Wu, You-Shan Zhao, Dong Wu, Li-Yu Zhou, Ji-Ying Su, Lu-Xi Song, Chao Xiao, Xiao Li, Chun-Kang Chang
Decitabine treatment improves immunological recognition that increases expression of cancer-testis antigens (CTAs) against solid tumors. The mechanisms of decitabine enhancement of immunogenicity when used for patients with myelodysplastic syndromes (MDS) remain unclear. In the present study, we found relatively low baseline expression of MAGE-A1, MAGE-A3, and SP17 in MDS-derived cell lines. Decitabine treatment significantly improved MAGE-A1, MAGE-A3, and SP17 expression in these cell lines and in MDS patients...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28327996/genome-sequencing-of-the-sweetpotato-whitefly-bemsia-tabaci-med-q
#9
Wen Xie, Chunhai Chen, Zezhong Yang, Litao Guo, Xin Yang, Dan Wang, Ming Chen, Jinqun Huang, Yanan Wen, Yang Zeng, Yating Liu, Jixing Xia, Lixia Tian, Hongying Cui, Qingjun Wu, Shaoli Wang, Baoyun Xu, Xianchun Li, Xinqiu Tan, Murad Ghanim, Baoli Qiu, Huipeng Pan, Dong Chu, Helene Delatte, M N Maruthi, Feng Ge, Xueping Zhou, Xiaowei Wang, Fanghao Wan, Yuzhou Du, Chen Luo, Fengming Yan, Evan L Preisser, Xiaoguo Jiao, Brad S Coates, Jinyang Zhao, Qiang Gao, Jinquan Xia, Ye Yin, Yong Liu, Judith K Brown, Xuguo Joe Zhou, Youjun Zhang
Background: The sweetpotato whitefly Bemisia tabaci is a highly destructive agricultural and ornamental crop pest. It damages host plants through both phloem feeding and vectoring plant pathogens. Introductions of B. tabaci are difficult to quarantine and eradicate because of its high reproductive rates, broad host plant range, and insecticide resistance. Findings: A total of 791 Gb of raw DNA sequence from whole genome shotgun sequencing, and 13 BAC pooling libraries were generated by Illumina sequencing using different combinations of mate-pair and pair-end libraries...
March 15, 2017: GigaScience
https://www.readbyqxmd.com/read/28326786/solvent-free-mechanosynthesis-of-composition-tunable-cesium-lead-halide-perovskite-quantum-dots
#10
Zhi-Yuan Zhu, Qi-Qi Yang, Lin-Feng Gao, Lei Zhang, An-Ye Shi, Chun-Lin Sun, Qiang Wang, Hao-Li Zhang
A facile and green mechanosynthesis strategy free of solvent and high reaction temperature was developed to fabricate highly emissive cesium lead halide perovskite (CsPbX3) quantum dots (QDs). Their composition can be adjusted conveniently simply through mechanically milling/grinding stoichiometric combinations of raw reagents, thereby introducing a broad luminescence tunability of the product with adjustable wavelength, line width, and photoluminescence quantum yield. Desired CsPbX3 QDs "library" can thus be readily constructed in a way like assembling Lego building blocks...
March 24, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28319297/tandem-coupling-of-azide-with-isonitrile-and-boronic-acid-facile-access-to-functionalized-amidines
#11
Zhen Zhang, Baoliang Huang, Guanyu Qiao, Liu Zhu, Fan Xiao, Feng Chen, Bin Fu, Zhenhua Zhang
Amidine is a notable nitrogen-containing structural motif found in bioactive natural products and pharmaceuticals. Herein, a novel rhodium(I)-catalyzed tandem reaction of readily accessible azides with isonitriles and boronic acids via a carbodiimide intermediate is achieved. This protocol offers an alternative approach toward N-sulfonyl-, N-acyl-, and N- phosphoryl-functionalized, as well as general N-aryl and N-alkyl amidines with broad substrate scope. In addition, functionalized guanidines can also been synthesized when amines are used instead...
April 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28306312/dirac-fermions-in-borophene
#12
Baojie Feng, Osamu Sugino, Ro-Ya Liu, Jin Zhang, Ryu Yukawa, Mitsuaki Kawamura, Takushi Iimori, Howon Kim, Yukio Hasegawa, Hui Li, Lan Chen, Kehui Wu, Hiroshi Kumigashira, Fumio Komori, Tai-Chang Chiang, Sheng Meng, Iwao Matsuda
Honeycomb structures of group IV elements can host massless Dirac fermions with nontrivial Berry phases. Their potential for electronic applications has attracted great interest and spurred a broad search for new Dirac materials especially in monolayer structures. We present a detailed investigation of the β_{12} sheet, which is a borophene structure that can form spontaneously on a Ag(111) surface. Our tight-binding analysis revealed that the lattice of the β_{12} sheet could be decomposed into two triangular sublattices in a way similar to that for a honeycomb lattice, thereby hosting Dirac cones...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28304152/reprogramming-of-histone-methylation-controls-the-differentiation-of-monocytes-into-macrophages
#13
Qi-Fan Zheng, Hui-Min Wang, Zhan-Feng Wang, Jin-Yang Liu, Qi Zhang, Li Zhang, Yuan-Hua Lu, Han You, Guang-Hui Jin
Subset heterogeneity of the mononuclear phagocyte system (MPS) is controlled by defined transcriptional networks and programs; however, the dynamic establishment of programs that control broad, orchestrated expression of transcription factors (TFs) during the progression of monocyte-into-phagocyte (MP) differentiation remains largely unexplored. By using chromatin immunoprecipitation assays, we show the extensive trimethylation of histone H3 lysine 4 (H3K4me3) as well as histone H3 lysine 27 (H3K27me3) occupancy with broad footprints at the promoters of MP differentiation-related TFs, such as HOXA and FOXO genes, KLF4, IRF8 and others...
March 17, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28304070/manganese-iii-acetate-catalyzed-oxidative-amination-of-benzylic-c-sp-3-h-bonds-with-nitriles
#14
Yaxing Zhang, Jianyu Dong, Lixin Liu, Long Liu, Yongbo Zhou, Shuang-Feng Yin
Mn-Catalyzed oxidative amination of benzylic C(sp(3))-H bonds with nitriles is disclosed, which enables the synthesis of a broad range of secondary amides in moderate to excellent yields under mild conditions. The interaction between Mn(iii) and DDQ facilitates the oxidation and makes it highly efficient and selective.
March 17, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28299865/novel-short-antimicrobial-peptide-isolated-from-xenopus-laevis-skin
#15
Yu Zhang, Songcai Liu, Siming Li, Yunyun Cheng, Linyan Nie, Gang Wang, Chen Lv, Wenzhen Wei, Cheng Cheng, Feng Hou, Linlin Hao
A rich source of bioactive peptides, including a large number of antimicrobial peptides, has been found in amphibian skin. In this study, a novel short antimicrobial peptide was purified from Xenopus laevis skin and characterised through reversed-phase high-performance liquid chromatography, Edman degradation and matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. The peptide was composed of six amino acids with a sequence of DEDLDE and thus named X. laevis antibacterial peptide-P2 (XLAsp-P2)...
March 16, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28298420/staged-induction-of-hiv-1-glycan-dependent-broadly-neutralizing-antibodies
#16
Mattia Bonsignori, Edward F Kreider, Daniela Fera, R Ryan Meyerhoff, Todd Bradley, Kevin Wiehe, S Munir Alam, Baptiste Aussedat, William E Walkowicz, Kwan-Ki Hwang, Kevin O Saunders, Ruijun Zhang, Morgan A Gladden, Anthony Monroe, Amit Kumar, Shi-Mao Xia, Melissa Cooper, Mark K Louder, Krisha McKee, Robert T Bailer, Brendan W Pier, Claudia A Jette, Garnett Kelsoe, Wilton B Williams, Lynn Morris, John Kappes, Kshitij Wagh, Gift Kamanga, Myron S Cohen, Peter T Hraber, David C Montefiori, Ashley Trama, Hua-Xin Liao, Thomas B Kepler, M Anthony Moody, Feng Gao, Samuel J Danishefsky, John R Mascola, George M Shaw, Beatrice H Hahn, Stephen C Harrison, Bette T Korber, Barton F Haynes
A preventive HIV-1 vaccine should induce HIV-1-specific broadly neutralizing antibodies (bnAbs). However, bnAbs generally require high levels of somatic hypermutation (SHM) to acquire breadth, and current vaccine strategies have not been successful in inducing bnAbs. Because bnAbs directed against a glycosylated site adjacent to the third variable loop (V3) of the HIV-1 envelope protein require limited SHM, the V3-glycan epitope is an attractive vaccine target. By studying the cooperation among multiple V3-glycan B cell lineages and their coevolution with autologous virus throughout 5 years of infection, we identify key events in the ontogeny of a V3-glycan bnAb...
March 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28289407/a-novel-antimicrobial-endolysin-lyspa26-against-pseudomonas-aeruginosa
#17
Mingquan Guo, Chunyan Feng, Jie Ren, Xuran Zhuang, Yan Zhang, Yongzhang Zhu, Ke Dong, Ping He, Xiaokui Guo, Jinhong Qin
The global increase in multidrug resistant (MDR) bacteria has led to phage therapy being refocused upon. A novel endolysin, LysPA26, containing a lysozyme-like domain, was screened against Pseudomonas aeruginosa in this study. It had activity against MDR P. aeruginosa without pretreatment with an outer-membrane permeabilizer. LysPA26 could kill up to 4 log units P. aeruginosa in 30 min. In addition, temperature and pH effect assays revealed that LysPA26 had good stability over a broad range of pH and temperatures...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28287720/discovery-of-novel-pyridone-conjugated-monosulfactams-as-potent-and-broad-spectrum-antibiotics-for-multidrug-resistant-gram-negative-infections
#18
Liang Tan, Yunliang Tao, Ting Wang, Feng Zou, Shuhua Zhang, Qunhuan Kou, Ao Niu, Qian Chen, Wenjing Chu, Xiaoyan Chen, Haidong Wang, Yushe Yang
Conjugating a siderophore to an antibiotic is a promising strategy to overcome the permeability-mediated resistance of Gram-negative pathogens. On the basis of the structure of BAL30072, novel pyridone-conjugated monosulfactams incorporating diverse substituents into the methylene linker between the 1,3-dihydroxypyridin-4(1H)-one and the aminothiazole oxime were designed and synthesized. Structure-activity relationship studies revealed that a variety of substituents were tolerated, with isopropyl (compound 12c) and methylthiomethyl (compound 16a) showing the best efficacy against multidrug-resistant (MDR) Gram-negative pathogens...
April 13, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28279345/generation-of-a-live-attenuated-influenza-vaccine-that-elicits-broad-protection-in-mice-and-ferrets
#19
Lulan Wang, Su-Yang Liu, Hsiang-Wen Chen, Juan Xu, Maxime Chapon, Tao Zhang, Fan Zhou, Yao E Wang, Natalie Quanquin, Guiqin Wang, Xiaoli Tian, Zhanlong He, Longding Liu, Wenhai Yu, David Jesse Sanchez, Yuying Liang, Taijiao Jiang, Robert Modlin, Barry R Bloom, Qihan Li, Jane C Deng, Paul Zhou, F Xiao-Feng Qin, Genhong Cheng
New influenza vaccines that provide effective and broad protection are desperately needed. Live attenuated viruses are attractive vaccine candidates because they can elicit both humoral and cellular immune responses. However, recent formulations of live attenuated influenza vaccines (LAIVs) have not been protective. We combined high-coverage transposon mutagenesis of influenza virus with a rapid high-throughput screening for attenuation to generate W7-791, a live attenuated mutant virus strain. W7-791 produced only a transient asymptomatic infection in adult and neonatal mice even at doses 100-fold higher than the LD50 of the parent strain...
March 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28263880/tc38-a-teleost-tfpi-2-peptide-that-kills-bacteria-via-penetration-of-the-cell-membrane-and-interaction-with-nucleic-acids
#20
Min Zhang, Bin Yue, Ai-Hua Zhang, Guang-Hua Wang, Yong Liu, Shun Zhou, Shun-Feng Cheng, Ning-Qiu Li
Tissue factor pathway inhibitor 2 (TFPI-2) is an analog of TFPI-1 and a potent endogenous inhibitor of tissue factor (TF)-mediated blood coagulation. Recent reports have proven that the C-terminal of TFPI-2 peptides in humans and several other vertebrates possesses antibacterial activity against Gram-positive and Gram-negative bacteria. In our previous study, we reported that the TFPI-2 peptide, TC38 in tongue sole (Cynoglossus semilaevis) was active against Micrococcus luteus. In this study, we further examine the antimicrobial spectrum, mechanism of action, and function of TC38 in tongue sole...
May 2017: Fish & Shellfish Immunology
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