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https://www.readbyqxmd.com/read/28904417/itaconic-acid-production-by-filamentous-fungi-in-starch-rich-industrial-residues
#1
Richa Bafana, Sarvanadevi Sivanesan, R A Pandey
Several fungi and starch-rich industrial residues were screened for itaconic acid (IA) production. Out of 15 strains, only three fungal strains were found to produce IA, which was confirmed by HPLC and GC-MS analysis. These strains were identified as Aspergillus terreus strains C1 and C2, and Ustilago maydis strain C3 by sequencing of 18S rRNA gene and internal transcribed spacer regions. Cis-aconitate decarboxylase (cad) gene, which encodes a key enzyme in IA production in A. terreus, was characterized from strains C1 and C2...
September 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/28888011/surface-pegylation-of-mesoporous-silica-materials-via-surface-initiated-chain-transfer-free-radical-polymerization-characterization-and-controlled-drug-release
#2
Long Huang, Meiying Liu, Liucheng Mao, Qiang Huang, Hongye Huang, Qing Wan, Jianwen Tian, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
As a new type of mesoporous silica materials with large pore diameter (pore size between 2 and 50nm) and high specific surface areas, SBA-15 has been widely explored for different applications especially in the biomedical fields. The surface modification of SBA-15 with functional polymers has demonstrated to be an effective way for improving its properties and performance. In this work, we reported the preparation of PEGylated SBA-15 polymer composites through surface-initiated chain transfer free radical polymerization for the first time...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28888010/decoration-of-gold-nanoparticles-with-thiolated-ph-responsive-polymeric-peg-b-p-2-dimethylamio-ethyl-methacrylate-co-itaconic-acid-shell-a-novel-platform-for-targeting-of-anticancer-agent
#3
Marjan Ghorbani, Hamed Hamishehkar
The aim of this study was to design and develop a new pH-responsive nano-platform for controlled and targeted delivery of anticancer drugs. Engineering of pH-responsive nanocarriers was prepared via decoration of gold nanoparticles (NPs) by thiolated (methoxy-poly(ethylene glycol)-b-poly((2-dimethylamino) ethyl methacrylate-co-itaconic acid) (mPEG-b-p(DMAEMA-co-IA) copolymer and fully characterized by various techniques and subsequently used for loading and targeted delivery of anticancer agent, methotrexate (MTX)...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28865130/temperature-dependent-dynamic-control-of-the-tca-cycle-increases-volumetric-productivity-of-itaconic-acid-production-by-escherichia-coli
#4
Björn-Johannes Harder, Katja Bettenbrock, Steffen Klamt
Based on the recently constructed E. coli itaconic acid production strain ita23, we aimed to improve the productivity by applying a two-stage process strategy with decoupled production of biomass and itaconic acid. We constructed a strain ita32 (MG1655 ▵aceA ▵pta ▵pykF ▵pykA pCadCs), which, in contrast to ita23, has an active tricarboxylic acid (TCA) cycle and a fast growth rate of 0.52 h(-1) at 37°C, thus representing an ideal phenotype for the first stage, the growth phase. Subsequently we implemented a synthetic genetic control allowing the downregulation of the TCA cycle and thus the switch from growth to itaconic acid production in the second stage...
September 2, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28846199/bio-based-production-of-dimethyl-itaconate-from-rice-wine-waste-derived-itaconic-acid
#5
Young-Chul Joo, Seung Kyou You, Sang Kyu Shin, Young Jin Ko, Ki Ho Jung, Sang A Sim, Sung Ok Han
Dimethyl itaconate is an important raw material for copolymerization, but it is not synthesized from itaconic acid by organisms. Moreover, Corynebacterium glutamicum is used as an important industrial host for the production of organic acids, but it does not metabolize itaconic acid. Therefore, the biosynthetic route towards dimethyl itaconate from itaconic acid is highly needed. In this study, we developed a biological procedure for dimethyl itaconate production from rice wine waste-derived itaconic acid using the engineered C...
August 28, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28843929/direct-surface-grafting-of-mesoporous-silica-nanoparticles-with-phospholipid-choline-containing-copolymers-through-chain-transfer-free-radical-polymerization-and-their-controlled-drug-delivery
#6
Long Huang, Jing Wu, Meiying Liu, Liucheng Mao, Hongye Huang, Qing Wan, Yanfeng Dai, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
Mesoporous silica nanoparticles have attracted considerable research attention due to their various applications. Surface modification of these mesoporous silica nanoparticles with polymers not only can improve their water dispersity but can also endow several new functions, such as drug loading and delivery or targeting capability. In this work, we report a novel strategy for the direct surface grafting of phospholipid choline-containing copolymers onto Santa Barbara Amorphous-15 (SBA-15) through surface-initiated chain transfer free radical polymerization...
August 24, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28797971/modified-pamam-dendrimer-with-4-carbomethoxypyrrolidone-surface-groups-its-uptake-efflux-and-location-in-a-cell
#7
Anna Janaszewska, Maciej Studzian, Johannes F Petersen, Mario Ficker, Valentina Paolucci, Jørn B Christensen, Donald A Tomalia, Barbara Klajnert-Maculewicz
Traditional amine terminated PAMAM dendrimers may be readily surface engineered by a facile one-pot conversion with dialkyl itaconate esters into 4-carbomethoxypyrrolidone terminated PAMAM (G=0-4) dendrimers. These terminated dendrimers are uniquely characterized by exhibiting blue fluorescence emissions (λexc=370nm, λmaxem=440nm). Thanks to this property they can be directly analyzed by confocal microscopy and flow cytometry without additional fluorescence labeling, treatment of dendrimers with chemicals or adjusting pH...
July 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28773186/synthesis-and-characterization-of-gelatin-based-crosslinkers-for-the-fabrication-of-superabsorbent-hydrogels
#8
Penphitcha Amonpattaratkit, Sureerat Khunmanee, Dong Hyun Kim, Hansoo Park
In this work, crosslinkers were prepared by conjugating high- and low-molecular-weight gelatin with different mole ratios of itaconic acid (IA) with double bonds. Then, the gelatin-itaconic acid (gelatin-IA) crosslinkers were compared with the gelatin-methacrylate (gelatin-MA) crosslinkers. The molecular weights and structures of gelatin-MA and gelatin-IA were confirmed using gel permeation chromatography (GPC) and nuclear magnetic resonance (NMR). Additionally, the swelling ratio and biodegradation properties of the hydrogels using IA as starting monomers and gelatin-IA and gelatin-MA as crosslinkers were investigated...
July 19, 2017: Materials
https://www.readbyqxmd.com/read/28772831/preparation-characterization-and-application-of-a-molecularly-imprinted-polymer-for-selective-recognition-of-sulpiride
#9
Wei Zhang, Xuhui She, Liping Wang, Huajun Fan, Qing Zhou, Xiaowen Huang, James Z Tang
A novel molecular imprinting polymer (MIP) was prepared by bulk polymerization using sulpiride as the template molecule, itaconic acid (ITA) as the functional monomer and ethylene glycol dimethacrylate (EGDMA) as the crosslinker. The formation of the MIP was determined as the molar ratio of sulpiride-ITA-EGDMA of 1:4:15 by single-factor experiments. The MIP showed good adsorption property with imprinting factor α of 5.36 and maximum adsorption capacity of 61.13 μmol/g, and was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR) and surface area analysis...
April 28, 2017: Materials
https://www.readbyqxmd.com/read/28699638/bcat1-controls-metabolic-reprogramming-in-activated-human-macrophages-and-is-associated-with-inflammatory-diseases
#10
Adonia E Papathanassiu, Jeong-Hun Ko, Martha Imprialou, Marta Bagnati, Prashant K Srivastava, Hong A Vu, Danilo Cucchi, Stephen P McAdoo, Elitsa A Ananieva, Claudio Mauro, Jacques Behmoaras
Branched-chain aminotransferases (BCAT) are enzymes that initiate the catabolism of branched-chain amino acids (BCAA), such as leucine, thereby providing macromolecule precursors; however, the function of BCATs in macrophages is unknown. Here we show that BCAT1 is the predominant BCAT isoform in human primary macrophages. We identify ERG240 as a leucine analogue that blocks BCAT1 activity. Selective inhibition of BCAT1 activity results in decreased oxygen consumption and glycolysis. This decrease is associated with reduced IRG1 levels and itaconate synthesis, suggesting involvement of BCAA catabolism through the IRG1/itaconate axis within the tricarboxylic acid cycle in activated macrophages...
July 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28629058/photo-induced-surface-grafting-of-phosphorylcholine-containing-copolymers-onto-mesoporous-silica-nanoparticles-for-controlled-drug-delivery
#11
Liucheng Mao, Meiying Liu, Long Huang, Dazhuang Xu, Qing Wan, Guangjian Zeng, Yanfeng Dai, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
Surface modification of mesoporous silica nanoparticles (MSNs) with functional polymers has become one of the most interest topics over the last decade. Among various surface modification strategies, surface-initiated atom transfer radical polymerization (ATRP) has been regarded as one of the most effective methods. However, the typical ATRP strategy is relied on the transition metal ions and their organic ligands as the polymerization catalyst systems. In this work, a novel surface-initiated ATRP method was established for surface functionalization of MSNs using 10-Phenylphenothiazine (PTH) as the catalyst, 2-methacryloyloxyethyl phosphorylcholine (MPC) and itaconic acid (IA) as the monomers...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28620888/design-of-isoniazid-smart-nanogel-by-gamma-radiation-induced-template-polymerization-for-biomedical-application
#12
Samia M Omar, Nabila A Maziad, Nourhan M El-Tantawy
PURPOSE: Preparation of Isoniazid (INH) loaded nanogel particles using gamma radiation as safe, simple, cheap and reproducible technique for promoting mycobacterial killing in a lower-dose system aiming in developing of drug resistance. METHODS: Polymeric pH-sensitive nanogels were prepared by gamma radiation-induced polymerization of Acrylic acid (AAc) or Itaconic acid (IA), in aqueous solution of polyvinylpyrrolidone (PVP), as template polymer. The prepared nanogels were utilized for encapsulation of INH...
September 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28599860/molecularly-imprinted-nanoparticles-grafted-to-porous-silica-as-chiral-selectors-in-liquid-chromatography
#13
Raquel Gutierrez-Climente, Alberto Gomez-Caballero, Antonio Guerreiro, Deiene Garcia-Mutio, Nora Unceta, M Aránzazu Goicolea, Ramon J Barrio
The work presented here explores the grafting of molecularly imprinted nanoparticles (MIN) on silica beads for the development of new chiral stationary phases (CSP). Both solid-phase imprinting and precipitation polymerisation were tested for MIN synthesis though the latter approach was the only one that provided efficient chiral selectors. MIN particles were prepared by iniferter polymerisation initiated by UV radiation, using itaconic acid as functional monomer and ethylene dimethacrylate as cross-linker...
June 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28559214/novel-salicylic-acid-based-chemically-crosslinked-ph-sensitive-hydrogels-as-potential-drug-delivery-systems
#14
Bahar Demirdirek, Kathryn E Uhrich
In this work, salicylic acid (SA), a non-steroidal anti-inflammatory, was chemically incorporated into hydrogel systems to achieve sustained SA release profiles. With its anti-inflammatory properties, sustained release of SA would be relevant for treating diseases such as diabetes and cancer. In this work, SA was chemically incorporated into hydrogel systems via covalent attachment to an itaconate moiety followed by UV-initiated crosslinking using acrylic acid and poly(ethylene glycol) diacrylate. The chemical composition of the hydrogel system was confirmed using FT-IR spectroscopy...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28550772/production-of-itaconic-acid-by-biotransformation-of-wheat-bran-hydrolysate-with-aspergillus-terreus-cicc40205-mutant
#15
Xuefeng Wu, Qing Liu, Yongdong Deng, Jinghong Li, Xiaoju Chen, Yongzhong Gu, Xijun Lv, Zhi Zheng, Shaotong Jiang, Xingjiang Li
The replacement of the carbon source in the microbial production of itaconic acid (IA) with economic alternatives has attracted significant attention. In this study, an Aspergillus terreus CICC40205 mutant was used to increase the IA titer and decrease the citric acid titer in the wheat bran hydrolysate compared with the parental strain. The results showed that the IA titer was increased by 33.4%, whereas the citric acid titer was decreased by 75.8%, and were in accordance with those of the improved pathway of co-metabolism of glucose and xylose according to the metabolic flux analysis...
October 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28538198/protein-and-metabolic-engineering-for-the-production-of-organic-acids
#16
Jingjing Liu, Jianghua Li, Hyun-Dong Shin, Long Liu, Guocheng Du, Jian Chen
Organic acids are natural metabolites of living organisms. They have been widely applied in the food, pharmaceutical, and bio-based materials industries. In recent years, biotechnological routes to organic acids production from renewable raw materials have been regarded as very promising approaches. In this review, we provide an overview of current developments in the production of organic acids using protein and metabolic engineering strategies. The organic acids include propionic acid, pyruvate, itaconic acid, succinic acid, fumaric acid, malic acid and citric acid...
September 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28533815/efficient-itaconic-acid-production-from-glycerol-with-ustilago-vetiveriae-tz1
#17
Thiemo Zambanini, Hamed Hosseinpour Tehrani, Elena Geiser, Dorothee Merker, Sarah Schleese, Judith Krabbe, Joerg M Buescher, Guido Meurer, Nick Wierckx, Lars M Blank
BACKGROUND: The family of Ustilaginaceae is known for their capability to naturally produce industrially valuable chemicals from different carbon sources. Recently, several Ustilaginaceae were reported to produce organic acids from glycerol, which is the main side stream in biodiesel production. RESULTS: In this study, we present Ustilago vetiveriae as new production organism for itaconate synthesis from glycerol. In a screening of 126 Ustilaginaceae, this organism reached one of the highest titers for itaconate combined with a high-glycerol uptake rate...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28532048/surface-grafting-of-eu-3-doped-luminescent-hydroxyapatite-nanomaterials-through-metal-free-light-initiated-atom-transfer-radical-polymerization-for-theranostic-applications
#18
Guangjian Zeng, Meiying Liu, Ruming Jiang, Chunning Heng, Qiang Huang, Liucheng Mao, Junfeng Hui, Fengjie Deng, Xiaoyong Zhang, Yen Wei
We reported a simple and efficient method to prepare the hydrophilic luminescent HAp polymer nanocomposites through the combination of ligand exchange and metal free light initiated surface-initiated atom transfer radical polymerization (SI-ATRP) using 10-phenylphenothiazine (PTH) as organic catalyst and 2-methacryloyloxyethyl phosphorylcholine (MPC) and itaconic acid (IA) as monomers. The biological imaging and drug delivery performance of HAp-poly(MPC-IA) nanorods were examined to evaluate their potential for biomedical applications...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28508183/compositional-design-and-taguchi-optimization-of-hardness-properties-in-silicone-based-ocular-lenses
#19
Mohammad Hanifeh, Mojgan Zandi, Parvin Shokrollahi, Mohammad Atai, Ebrahim Ghafarzadeh, Fahimeh Askari
A multi-component acrylate-based copolymer system especially designed for application as ocular lenses is developed through free-radical, bulk polymerization of a system containing hydroxyethyl methacrylate, methyl methacrylate, triethylene glycol dimethacrylate, dimethyl itaconate, 3-(trimethoxysilyl) propylmethacrylate, Polyhedraloligomeric silsesquioxane-acrylate (POSS-acrylate) and AIBN as an initiator. The progress of the reaction was monitored by Fourier transform infrared spectroscopy (FTIR). The effect of increasing concentration of the components on the hardness of the synthesized lenses was measured by Shore Durometer before and after immersion in PBS solutions...
May 15, 2017: Progress in biomaterials
https://www.readbyqxmd.com/read/28452785/adsorption-of-methylene-blue-by-using-novel-chitosan-g-itaconic-acid-bentonite-nanocomposite-equilibrium-and-kinetic-study
#20
Farzaneh Shakib, Ahmad Dadvand Koohi, Arash Kamran Pirzaman
In this study, novel chitosan-g-itaconic acid/bentonite (CTS-g-IA/BT) and chitosan/bentonite (CTS/BT) nanocomposites were synthesized for adsorption of methylene blue (MB) from aqueous solution. The process was pH-sensitive and maximum sorption was obtained at pH 6 (CTS-g-IA/BT) and 7 (CTS/BT) in 76 h agitation time using 0.03 g of nanocomposites for 50 mL of MB solution. The results showed that in pH less than 6, the adsorption capacity of CTS-g-IA/BT nanocomposite due to the existence of IA monomer is less than that of CTS/BT nanocomposite...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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