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https://www.readbyqxmd.com/read/27922186/characterization-of-the-pro-inflammatory-cytokine-il-1%C3%AE-on-butyrate-oxidation-in-colorectal-cancer-cells
#1
Megan Johnstone, Natalie Bennett, Cynthia Standifer, Alexis Smith, Anna Han, Ahmed Bettaieb, Jay Whelan, Dallas R Donohoe
Cancer, in part, is driven, by alterations in cellular metabolism that promote cell survival and cell proliferation. Identifying factors that influence this shift in cellular metabolism in cancer cells is important. Interleukin-1β (IL-1β) is a pro-inflammatory cytokine that has been reported to be elevated in colorectal cancer patients. While much is known towards the effect of dietary nutrients on regulating inflammation and the inflammatory response, which includes cytokines such as IL-1β, far less is understood how cytokines impact nutrient fate to alter cancer cell metabolism...
December 6, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27922117/authentication-of-chinese-vintage-liquors-using-bomb-pulse-14-c
#2
Peng Cheng, Weijian Zhou, G S Burr, Yunchong Fu, Yukun Fan, Shugang Wu
The older a bottle of Chinese vintage liquor is, the higher the price it commands. Driven by the potential for higher profits, some newly-founded distilleries openly sell liquor whose storage ages are exaggerated. In China, the market for vintage liquor has become fraught with uncertainty and a pressing need has arisen to establish an effective method to authenticate the age of vintage liquors. A radiocarbon ((14)C) dating method is described here that can verify cellar-stored years of Chinese liquors distilled within the last fifty years...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921362/effects-of-mineral-salt-supplement-on-enteric-methane-emissions-ruminal-fermentation-and-methanogen-community-of-lactating-cows
#3
Xiaohua Li, Chong Liu, Yongxing Chen, Rongguang Shi, Zhenhua Cheng, Hongmin Dong
We evaluated the effects of mineral salt supplement on enteric methane emissions, ruminal fermentation and methanogen community of dairy cows over a whole lactation period. Ten Holstein cows fed a total mixed ration (TMR) diet were randomly allocated into two groups, one supplied with mineral salts as the treatment group and the other as the control group. The methane measurement showed that the ingestion of mineral salts lowered enteric methane emissions significantly (P < 0.05), with an average of 10...
December 6, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27921291/evaluation-of-capillary-electrophoresis-for-the-analysis-of-rooibos-and-honeybush-tea-phenolics
#4
William J Arries, Andreas G J Tredoux, Dalene de Beer, Elizabeth Joubert, André de Villiers
Rooibos and honeybush are popular herbal teas produced from the shrubs of Aspalathus linearis and Cyclopia spp., respectively, which are indigenous to South Africa. Both herbal teas are rich in polyphenols and their consumption is associated with several health benefits, partly ascribed to their phenolic constituents. Quantification of phenolics in extracts and teas for quality control and research purposes is generally performed using HPLC, although dedicated and often species-specific methods are required...
December 6, 2016: Electrophoresis
https://www.readbyqxmd.com/read/27920887/preliminary-study-on-cost-effective-l-tryptophan-production-from-indole-and-l-serine-by-e-coli-cells
#5
Tahereh Sadeghiyan-Rizi, Jamshid Fooladi, Sima Sadrai
BACKGROUND: L-tryptophan is used widespread in the pharmaceutical industry. The majority of L-Trp production depends on microbial processes that produce L-tryptophan from indole and L-serine. These processes are very costly due to the costs of precursors, especially L-serine. Use of inexpensive substitutions as the L-serine source of L-tryptophan production enables us to reach a cost-effective process. In this paper, effect of Triton X-100 on L-Trp production and the ability to use Iranian cane molasses as inexpensive L-serine source was investigated...
October 2016: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/27920276/studies-of-recombinant-twa1-reveal-constitutive-dimerisation
#6
Ore Francis, Genevieve E Baker, Paul R Race, Josephine C Adams
The mammalian muskelin/RanBP9/CTLH complex and the S. cerevisiae GID complex are large, multi-protein complexes that each contain a RING E3 ubiquitin ligase. The yeast GID complex acts to degrade a key enzyme of gluconeogenesis, fructose 1,6-bisphosphatase, under conditions of abundant fermentable carbon sources. However, the assembly and functions of the mammalian complex remain poorly understood. A striking feature of these complexes is the presence of multiple proteins that contain contiguous lissencephaly-1 homology (LisH), C-terminal to LisH (CTLH) and C-terminal CT11-RanBP9 (CRA) domains...
December 5, 2016: Bioscience Reports
https://www.readbyqxmd.com/read/27919815/chemical-modification-of-functionalized-polyhydroxyalkanoates-via-click-chemistry-a-proof-of-concept
#7
Samuel Nkrumah-Agyeefi, Carmen Scholz
A novel approach to the post-biosynthetic chemical modification of bromo and alkyne functionalized poly(3-hydroxyalkanoates), (PHAs), via copper-catalyzed azide-alkyne cycloaddition (CuAAC) and strain promoted azide alkyne cycloaddition (SPAAC) is reported. Optimum conditions for the biosynthesis of the PHA copolymers, poly(3-hydroxynonanoate-co-3-hydroxy-11-bromoundecanoate) (PHNUBr) and poly(3-hydroxynonanoate-co-3-hydroxy-10-undecynoate) (PHNUD), using Pseudomonas oleovorans as cell factories were 20h of fermentation time and a total carbon substrate concentration of 40mM...
December 2, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27919791/biosensor-assisted-transcriptional-regulator-engineering-for-methylobacterium-extorquens-am1-to-improve-mevalonate-synthesis-by-increasing-the-acetyl-coa-supply
#8
Wei-Fan Liang, Lan-Yu Cui, Jin-Yu Cui, Kai-Wen Yu, Song Yang, Chong Zhang, Xin-Hui Xing
Acetyl-CoA is not only an important intermediate metabolite for cells but also a significant precursor for production of industrially interesting metabolites. Methylobacterium extorquens AM1, a model strain of methylotrophic cell factories using methanol as carbon source, is of interest because it produces abundant coenzyme A compounds capable of directing to synthesis of different useful compounds from methanol. However, acetyl-CoA always does not efficiently accumulate in M. extorquens AM1, as it is located in the center of three cyclic central metabolic pathways...
December 3, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/27919692/improved-production-of-2-fucosyllactose-in-engineered-escherichia-coli-by-expressing-putative-%C3%AE-1-2-fucosyltransferase-wcfb-from-bacteroides-fragilis
#9
Young-Wook Chin, Ji-Yeong Kim, Jae-Han Kim, Sang-Min Jung, Jin-Ho Seo
2'-Fucosyllactose (2-FL) is one of most abundant oligosaccharides in human milk, which is involved in many biological functions for infant health. Since 2-FL has a great potential in application to functional food materials and pharmaceuticals, several microbial systems for mass production of 2-FL have been developed in recent years. Microbial production of 2-FL was suggested to be influenced by a number of factors including fucosylation activity of α-1,2-fucosyltransferase. In the present study, the wcfB gene coding for α-1,2-fucosyltransferase from Bacteroides fragilis was screened from eleven candidates of putative α-1,2-fucosyltransferase...
December 2, 2016: Journal of Biotechnology
https://www.readbyqxmd.com/read/27919544/dual-effect-of-soluble-materials-in-pretreated-lignocellulose-on-simultaneous-saccharification-and-co-fermentation-process-for-the-bioethanol-production
#10
Lei Qin, Xia Li, Li Liu, Jia-Qing Zhu, Qi-Man Guan, Man-Tong Zhang, Wen-Chao Li, Bing-Zhi Li, Ying-Jin Yuan
In this study, wash liquors isolated from ethylenediamine and dry dilute acid pretreated corn stover were used to evaluate the effect of soluble materials in pretreated biomass on simultaneous saccharification and co-fermentation (SSCF) for ethanol production, respectively. Both of the wash liquors had different impacts on enzymatic hydrolysis and fermentation. Enzymatic conversions of glucan and xylan monotonically decreased as wash liquor concentration increased. Whereas, with low wash liquor concentrations, xylose consumption rate, cell viability and ethanol yield were maximally stimulated in fermentation without nutrient supplementary...
November 29, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27918906/diet-and-the-risk-of-head-and-neck-cancer-among-never-smokers-and-smokers-in-a-chinese-population
#11
Carrie Butler, Yuan-Chin Amy Lee, Shuang Li, Qian Li, Chien-Jen Chen, Wan-Lun Hsu, Pen-Jen Lou, Cairong Zhu, Jian Pan, Hongbing Shen, Hongxia Ma, Lin Cai, Baochang He, Yu Wang, Xiaoyan Zhou, Qinghai Ji, Baosen Zhou, Wei Wu, Jie Ma, Paolo Boffetta, Zuo-Feng Zhang, Min Dai, Mia Hashibe
BACKGROUND: Few studies have been conducted in China to investigate the association between diet and the risk of head-and-neck cancer (HNC). The aim of this study was to determine the relationship between diet and HNC risk in the Chinese population and to examine whether smoking status has any effect on the risk. METHODS: Our multicenter case-control study included 921 HNC cases and 806 controls. We obtained information on the frequency of both animal- and plant-based food consumption...
December 2, 2016: Cancer Epidemiology
https://www.readbyqxmd.com/read/27918882/metabolic-engineering-of-corynebacterium-glutamicum-for-the-production-of-3-hydroxypropionic-acid-from-glucose-and-xylose
#12
Zhen Chen, Jinhai Huang, Yao Wu, Wenjun Wu, Ye Zhang, Dehua Liu
3-Hydroxypropionic acid (3-HP) is a promising platform chemical which can be used for the production of various value-added chemicals. In this study,Corynebacterium glutamicumwas metabolically engineered to efficiently produce 3-HP from glucose and xylose via the glycerol pathway. A functional 3-HP synthesis pathway was engineered through a combination of genes involved in glycerol synthesis (fusion ofgpdandgppfromSaccharomyces cerevisiae) and 3-HP production (pduCDEGHfromKlebsiella pneumoniaeand aldehyde dehydrogenases from various resources)...
December 2, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/27918147/genome-analysis-of-a-hyper-acetone-butanol-ethanol-abe-producing-clostridium-acetobutylicum-bkm19
#13
Changhee Cho, Donghui Choe, Yu-Sin Jang, Kyung-Jin Kim, Won Jun Kim, Byung-Kwan Cho, E Terry Papoutsakis, George N Bennett, Do Young Seung, Sang Yup Lee
We previously reported development of a hyper acetone-butanol-ethanol (ABE) producing Clostridium acetobutylicum BKM19 strain capable of producing 30.5% more total solvent by random mutagenesis of its parental strain PJC4BK, which is a buk mutant C. acetobutylicum ATCC 824 strain. Here BKM19 and PJC4BK strains were re-sequenced by a high-throughput sequencing technique to understand the mutations responsible for enhanced solvent production. In comparison with the C. acetobutylicum PJC4BK, 13 single nucleotide variants (SNVs), 1 deletion and 1 back mutation SNV were identified in the C...
December 5, 2016: Biotechnology Journal
https://www.readbyqxmd.com/read/27917968/innovations-in-food-preservation-in-pastoral-zones
#14
C Jans, D W Mulwa Kaindi, L Meile
Food preservation makes a significant contribution to food security and food safety in pastoral communities with limited access to external food sources. Raw materials are preserved by heating, drying, smoking, pickling, salting, curing or fermentation with microorganisms. This article describes preservation techniques in the pastoral context, targeting the major dietary components of milk, meat and cereals; related health risks; and potential innovations for food preservation. Sustainable elimination of pathogenic microorganisms, preventing re-contamination, sporulation and the growth of zoonotic and foodborne microorganisms, is necessary to enhance food safety and ensure food security by reducing post-harvest losses and food waste...
November 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/27917206/anticancer-and-antibacterial-secondary-metabolites-from-the-endophytic-fungus-penicillium-sp-cam64-against-multi-drug-resistant-gram-negative-bacteria
#15
Jean-Bosco Jouda, Jean-de-Dieu Tamokou, Céline Djama Mbazoa, Prodipta Sarkar, Prasanta Kumar Bag, Jean Wandji
BACKGROUND: The emergence of multiple-drug resistance bacteria has become a major threat and thus calls for an urgent need to search for new effective and safe anti-bacterial agents. OBJECTIVES: This study aims to evaluate the anticancer and antibacterial activities of secondary metabolites from Penicillium sp., an endophytic fungus associated with leaves of Garcinia nobilis. METHODS: The culture filtrate from the fermentation of Penicillium sp...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27917159/predominately-uncultured-microbes-as-sources-of-bioactive-agents
#16
REVIEW
David J Newman
In this short review, I am discussing the relatively recent awareness of the role of symbionts in plant, marine-invertebrates and fungal areas. It is now quite obvious that in marine-invertebrates, a majority of compounds found are from either as yet unculturable or poorly culturable microbes, and techniques involving "state of the art" genomic analyses and subsequent computerized analyses are required to investigate these interactions. In the plant kingdom evidence is amassing that endophytes (mainly fungal in nature) are heavily involved in secondary metabolite production and that mimicking the microbial interactions of fermentable microbes leads to involvement of previously unrecognized gene clusters (cryptic clusters is one name used), that when activated, produce previously unknown bioactive molecules...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27917102/euler-lagrange-computational-fluid-dynamics-for-bio-reactor-scale-down-an-analysis-of-organism-lifelines
#17
Cees Haringa, Wenjun Tang, Amit T Deshmukh, Jianye Xia, Matthias Reuss, Joseph J Heijnen, Robert F Mudde, Henk J Noorman
The trajectories, referred to as lifelines, of individual microorganisms in an industrial scale fermentor under substrate limiting conditions were studied using an Euler-Lagrange computational fluid dynamics approach. The metabolic response to substrate concentration variations along these lifelines provides deep insight in the dynamic environment inside a large-scale fermentor, from the point of view of the microorganisms themselves. We present a novel methodology to evaluate this metabolic response, based on transitions between metabolic "regimes" that can provide a comprehensive statistical insight in the environmental fluctuations experienced by microorganisms inside an industrial bioreactor...
October 2016: Engineering in Life Sciences
https://www.readbyqxmd.com/read/27916901/modeling-lactic-fermentation-of-gow%C3%A3-using-lactobacillus-starter-culture
#18
Bettencourt de J C Munanga, Gérard Loiseau, Joël Grabulos, Christian Mestres
A global model of the lactic fermentation step of gowé was developed by assembling blocks hosting models for bacterial growth, lactic acid production, and the drop of pH during fermentation. Commercial strains of Lactobacillus brevis and of Lactobacillus plantarum were used; their growth was modeled using Rosso's primary model and the gamma concept as a secondary model. The optimum values of pH and temperature were 8.3 ± 0.3, 44.6 ± 1.2 °C and 8.3 ± 0.3, 3.2 ± 37.1 °C with μmax values of 1.8 ± 0.2 and 1...
December 1, 2016: Microorganisms
https://www.readbyqxmd.com/read/27916804/growth-phase-sterigmatocystin-formation-on-lactose-is-mediated-via-low-specific-growth-rates-in-aspergillus-nidulans
#19
Zoltán Németh, Ákos P Molnár, Balázs Fejes, Levente Novák, Levente Karaffa, Nancy P Keller, Erzsébet Fekete
Seed contamination with polyketide mycotoxins such as sterigmatocystin (ST) produced by Aspergilli is a worldwide issue. The ST biosynthetic pathway is well-characterized in A. nidulans, but regulatory aspects related to the carbon source are still enigmatic. This is particularly true for lactose, inasmuch as some ST production mutant strains still synthesize ST on lactose but not on other carbon substrates. Here, kinetic data revealed that on d-glucose, ST forms only after the sugar is depleted from the medium, while on lactose, ST appears when most of the carbon source is still available...
November 28, 2016: Toxins
https://www.readbyqxmd.com/read/27916500/achieving-ethanol-type-fermentation-for-hydrogen-production-in-a-granular-sludge-system-by-aeration
#20
Song Zhang, Min Liu, Ying Chen, Yu-Ting Pan
To investigate the effects of aeration on hydrogen-producing granular system, experiments were performed in two laboratory-scale anaerobic internal circulation hydrogen production (AICHP) reactors. The preliminary experiment of Reactor 1 showed that direct aeration was beneficial to enhancing hydrogen production. After the direct aeration was implied in Reactor 2, hydrogen production rate (HPR) and hydrogen content were increased by 100% and 60%, respectively. In addition, mixed-acid fermentation was transformed into typical ethanol-type fermentation (ETF)...
November 25, 2016: Bioresource Technology
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