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Patrick Weber, Seyed A Nasseri, Bettina M Pabst, Ana Torvisco, Philipp Müller, Eduard Paschke, Marion Tschernutter, Werner Windischhofer, Stephen G Withers, Tanja M Wrodnigg, Arnold E Stütz
From 1,2;3,4-di- O -isopropylidene-d-galactopyranose, a preliminary series of highly functionalized amino(hydroxymethyl)cyclopentanes was easily available. These amine-containing basic carbasugars featuring the d- galacto configuration are potent inhibitors of the GH20 β-d-hexosaminidases probed and may bear potential as regulators of N -acetyl-d-hexosaminidase activities in vivo.
March 20, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Carine Beysen, Marcie Ruddy, Aubrey Stoch, Lori A Mixson, Kim Rosko, Tim Riiff, Scott M Turner, Marc K Hellerstein, Elizabeth J Murphy
Fructose feeding increases hepatic de novo lipogenesis (DNL) and is associated with non-alcoholic fatty liver disease. Little is known, however, about individual variation in susceptibility to fructose stimulation of DNL. In this three-period, cross-over study, seventeen healthy male subjects were enrolled to evaluate the within and between subject variability of acute fructose feeding on hepatic fractional DNL. During each assessment, [1-13 C1 ]-acetate was infused to measure DNL in the fasting state and during fructose feeding...
March 20, 2018: American Journal of Physiology. Endocrinology and Metabolism
Hiroyuki Yamauchi, Kazue Honma, Kazuki Mochizuki, Toshinao Goda
Jejunal sodium/glucose co-transporter (Sglt1) displays circadian expression. The jejunum was collected every 4 h from mice, and we examined histone acetylation and binding of bromodomain-containing protein-4 (BRD4) around of the gene. Histone acetylation increased in the transcribed region of Sglt1 prior to induction of the gene. Furthermore, the binding of mRNA elongation factor around the gene showed circadian rhythm.
March 20, 2018: Bioscience, Biotechnology, and Biochemistry
Yi-Chao Hsu, Yu-Ting Wu, Chia-Ling Tsai, Yau-Huei Wei
In mammalian cells, there are seven members of the sirtuin protein family (SIRT1-7). SIRT1, SIRT6, and SIRT7 catalyze posttranslational modification of proteins in the nucleus, SIRT3, SIRT4, and SIRT5 are in the mitochondria and SIRT2 is in the cytosol. SIRT1 can deacetylate the transcription factor SOX2 and regulate induced pluripotent stem cells (iPSCs) reprogramming through the miR-34a-SIRT1-p53 axis. SIRT2 can regulate the function of pluripotent stem cells through GSK3β. SIRT3 can positively regulate PPAR gamma coactivator 1-alpha (PGC-1α) expression during the differentiation of stem cells...
March 2018: Experimental Biology and Medicine
Xiangfen Cui, Hongguang Cheng, Xuelian Liu, Elisa Giubilato, Andrea Critto, Haixu Sun, Lei Zhang
Adverse health effects related to accumulative cadmium (Cd) exposure have aroused widespread attention from the public in China. Knowledge on the relationships between Cd exposure and early renal effects is particularly limited for children, who are more susceptible to absorbing metals than adults. A typical Cd-polluted area of South China was selected to determine the Cd exposure and related early renal effects of the general population, including children. In total, 211 children and 806 adults were enrolled in the study...
March 19, 2018: Environmental Science and Pollution Research International
Xiu-Mei Li, Xue-Gang Luo, Jun-Fang He, Nan Wang, Hao Zhou, Pei-Long Yang, Tong-Cun Zhang
Hypericum ascyron L. (Great St. Johnswort), which belongs to the Hypericaceae family, has been used for the treatment of hematemesis, metrorrhagia, rheumatism, swelling, stomach ache, abscesses, dysentery and irregular menstruation for >2,000 years in China. The aim of the present study was to clarify the anticancer activity compounds from H. ascyron L. and the underlying molecular mechanism. Anticancer activity of H. ascyron L. extract was evaluated using an MTT assay. To confirm the anticancer mechanism of activity compounds, Hoechst 33258, Annexin V-fluorescein isothiocyanate/propidium iodide, 2',7'-dichlorodihydrofluorescein diacetate, rhodamine 123 staining and caspase-3 activity analysis were performed...
March 2018: Oncology Letters
Yongming Pan, Jianqin Xu, Cheng Chen, Fangming Chen, Ping Jin, Keyan Zhu, Chenyue W Hu, Mengmeng You, Minli Chen, Fuliang Hu
Alzheimer's disease (AD) is the most common form of dementia characterized by aggregation of amyloid β (Aβ) and neuronal loss. One of the risk factors for AD is high cholesterol levels, which are known to promote Aβ deposition. Previous studies have shown that royal jelly (RJ), a product of worker bees, has potential neuroprotective effects and can attenuate Aβ toxicity. However, little is known about how RJ regulates Aβ formation and its effects on cholesterol levels and neuronal metabolic activities...
2018: Frontiers in Aging Neuroscience
Çinel Köksal Karayildirim, Mustafa Kotmakçi, Erkan Halay, Kadir Ay, Yücel Başpinar
5-Fluorouracil is one of the first line drugs for the systemic therapy of solid tumors like breast, colorectal, oesophageal, stomach, pancreatic, head and neck. It could be shown that sugars can improve the absorption across cell membranes and can help to bypass some pharmacokinetic problems. Carbohydrates as most common organic molecules are an important issue of plant and animal metabolisms. They are non toxic and have important duties in the body like participating in DNA and RNA synthesis and being responsible for energy production...
March 2018: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
Hiroki Hamamoto, Kentaro Maemura, Kentaro Matsuo, Kohei Taniguchi, Yoshihisa Tanaka, Sugiko Futaki, Atsushi Takeshita, Akira Asai, Michihiro Hayashi, Yoshinobu Hirose, Yoichi Kondo, Kazuhisa Uchiyama
Hepatocellular carcinoma (HCC) is a common malignant tumor with poor prognosis. We previously showed that expression of Delta-like 3 (DLL3), a member of the family of Delta/Serrate/Lag2 ligands for the Notch receptor, is silenced by aberrant DNA methylation and that overexpression of DLL3 in an HCC cell line induces cellular apoptosis. However, how DLL3 expression is regulated during hepatocarcinogenesis is still unclear. Here, we show that silencing of DLL3 during hepatocarcinogenesis is closely related to viral infection, especially hepatitis B virus (HBV) infection (p = 0...
March 19, 2018: Scientific Reports
Mandar T Naik, Mooseok Kang, Chun-Chen Ho, Pei-Hsin Liao, Yung-Lin Hsieh, Nandita M Naik, Szu-Huan Wang, Iksoo Chang, Hsiu-Ming Shih, Tai-Huang Huang
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
March 19, 2018: Scientific Reports
Philippine C Geiszler, Aslihan Ugun-Klusek, Karen Lawler, Marie-Christine Pardon, Ding Yuchun, Li Bai, Clare A Daykin, Dorothee P Auer, Lynn Bedford
Metabolite profiling is an important tool that may better capture the multiple features of neurodegeneration. With the considerable parallels between mouse and human metabolism, the use of metabolomics in mouse models with neurodegenerative pathology provides mechanistic insight and ready translation into aspects of human disease. Using 400 MHz nuclear magnetic resonance spectroscopy we have carried out a temporal region-specific investigation of the metabolome of neuron-specific 26S proteasome knockout mice characterised by progressive neurodegeneration and Lewy-like inclusion formation in the forebrain...
March 19, 2018: Scientific Reports
Paul P Lin, Alec J Jaeger, Tung-Yun Wu, Sharon C Xu, Abraxa S Lee, Fanke Gao, Po-Wei Chen, James C Liao
The Embden-Meyerhoff-Parnas (EMP) pathway, commonly known as glycolysis, represents the fundamental biochemical infrastructure for sugar catabolism in almost all organisms, as it provides key components for biosynthesis, energy metabolism, and global regulation. EMP-based metabolism synthesizes three-carbon (C3) metabolites before two-carbon (C2) metabolites and must emit one CO2 in the synthesis of the C2 building block, acetyl-CoA, a precursor for many industrially important products. Using rational design, genome editing, and evolution, here we replaced the native glycolytic pathways in Escherichia coli with the previously designed nonoxidative glycolysis (NOG), which bypasses initial C3 formation and directly generates stoichiometric amounts of C2 metabolites...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Taylor C Stevenson, Colette Cywes-Bentley, Tyler D Moeller, Kevin B Weyant, David Putnam, Yung-Fu Chang, Bradley D Jones, Gerald B Pier, Matthew P DeLisa
Many microbial pathogens produce a β-(1→6)-linked poly- N -acetyl-d-glucosamine (PNAG) surface capsule, including bacterial, fungal, and protozoan cells. Broadly protective immune responses to this single conserved polysaccharide antigen in animals are possible but only when a deacetylated poly- N -acetyl-d-glucosamine (dPNAG; <30% acetate) glycoform is administered as a conjugate to a carrier protein. Unfortunately, conventional methods for natural extraction or chemical synthesis of dPNAG and its subsequent conjugation to protein carriers can be technically demanding and expensive...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Blake Ushijima, Claudia C Häse
Chemotaxis, the directed movement towards or away from a chemical signal, can be essential to bacterial pathogens for locating hosts or avoiding hostile environments. The coral pathogen Vibrio coralliilyticus chemotaxes towards coral mucus; however, chemotaxis has not been experimentally demonstrated to be important for virulence. To further examine this, in-frame mutations were constructed in genes predicted to be important for V. coralliilyticus chemotaxis. Most Vibrio genomes encode multiple homologs of various chemotaxis-related genes and two paralogs of each for cheB , cheR , and cheA were identified...
March 19, 2018: Journal of Bacteriology
Dai Hatakeyama, Masaki Shoji, Seiya Yamayoshi, Rina Yoh, Naho Ohmi, Shiori Takenaka, Ayaka Saitoh, Yumie Arakaki, Aki Masuda, Tsugunori Komatsu, Rina Nagano, Masahiro Nakano, Takeshi Noda, Yoshihiro Kawaoka, Takashi Kuzuhara
Histone acetylation plays crucial roles in transcriptional regulation and chromatin organization. Viral RNA of the influenza virus interacts with its nucleoprotein (NP), whose function corresponds to that of eukaryotic histones. NP regulates viral replication and has been shown to undergo acetylation by the CREB-binding protein (CBP) from the host. However, whether NP is the target of other host acetyltransferases is unknown. Here, we show that influenza virus NP undergoes acetylation by the two host acetyltransferases GCN5 and P300/CBP-associated factor (PCAF) and that this modification affects viral polymerase activities...
March 19, 2018: Journal of Biological Chemistry
Sha Xie, Ting Zhao, Zhen-Wen Zhang, Jiangfei Meng
Vitis vinifera has been thought to be unable to produce pelargonidin-type anthocyanins because its dihydroflavonol 4-reductase (DFR) does not efficiently reduce dihydrokaempferol. However, in this study, pelargonidin 3-O-glucoside was detected in the skin of V. vinifera 'Pinot Noir', 'Cabernet Sauvignon' and 'Yan73', as well as in the flesh of 'Yan73' using HPLC-ESI-MS/MS. Additionally, pelargonidin 3-O-(6-acetyl)-glucoside was detected in 'Yan73' skin and flesh for the first time. To further confirm the presence of pelargonidin-type anthocyanins in these grape cultivars, their DFRs were cloned, expressed in Escherichia coli and purified...
March 20, 2018: Journal of Agricultural and Food Chemistry
Buchun Si, Jiaming Li, Zhangbing Zhu, Mengmeng Shen, Jianwen Lu, Na Duan, Yuanhui Zhang, Qiang Liao, Yun Huang, Zhidan Liu
One critical challenge of hydrothermal liquefaction (HTL) is its complex aqueous product, which has a high concentration of organic pollutants (up to 100gCOD/L) and diverse fermentation inhibitors, such as furfural, phenolics and N-heterocyclic compounds. Here we report continuous anaerobic digestion of HTL wastewater via an up-flow anaerobic sludge bed reactor (UASB) and packed bed reactor (PBR). Specifically, we investigated the transformation of fermentation inhibitors and microbial response. GC-MS identified the complete degradation of furfural and 5-hydroxymethylfurfural (5-HMF), and partial degradation (54...
March 1, 2018: Science of the Total Environment
Huai Guan, Maoying Wang, Chenghong Liao, Jing Liang, Prajwalini Mehere, Meiling Tian, Hairong Liu, Howard Robinson, Jianyong Li, Qian Han
Mosquitoes transmit a number of diseases in animals and humans, including Dengue, Chikungunya and Zika viruses that affect millions of people each year. Controlling the disease-transmitting mosquitoes has proven to be a successful strategy to reduce the viruses transmission. Polyamines are required for the life cycle of the RNA viruses, Chikungunya virus and Zika virus, and a depletion of spermidine and spermine in the host via induction of spermine N-acetyltransferase restricts their replication. Spermine N-acetyltransferase is a key catabolic enzyme in the polyamine pathway, however there is no information of the enzyme identification in any insects...
2018: PloS One
Yoshinori Sato, Yuka Unno, Tsuneyuki Ubagai, Yasuo Ono
We investigated the numbers of planktonic and biofilm cells and the expression levels of genes encoding efflux pumps and biofilm-related proteins in 10 clinical isolates of multi-drug resistant Acinetobacter baumannii (MDRA) as well as in its standard strain ATCC 19606 in the presence of colistin (CST), polymyxin B (PMB), minomycin (MIN), and tigecycline (TGC) at their respective sub-MICs. The number of planktonic and biofilm cells of ATCC 19606 decreased in the presence of all aforementioned antibiotics in a dose-dependent manner...
2018: PloS One
Kalaivani A, V V Sathibabu Uddandrao, Brahmanaidu Parim, Saravanan Ganapathy, Nivedha P R, Sushma Chandulee Kancharla, Rameshreddy P, Swapna K, Vadivukkarasi Sasikumar
In this study, we evaluated the ameliorative potential of Cucurbita maxima seeds oil (CSO (100 mg/kg body weight)) supplementation to high fat diet (HFD)-induced obese rats for 30 days on the changes in body weight, markers of lipid metabolism such as LDL, HDL, triglycerides, total cholesterol, adiponectin, leptin, amylase, and lipase. We also investigated the effects of CSO on the changes of lipid metabolic enzymes such as fatty-acid synthase, acetyl CoA carboxylase, carnitine palmitoyl transferase-1, HMG CoA reductase, and inflammatory markers (TNF-α and IL-6)...
March 19, 2018: Archives of Physiology and Biochemistry
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