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https://www.readbyqxmd.com/read/28636078/microbial-lipopeptide-production-and-purification-bioprocesses-current-progress-and-future-challenges
#1
REVIEW
François Coutte, Didier Lecouturier, Krasimir Dimitrov, Jean-Sébastien Guez, Frank Delvigne, Pascal Dhulster, Philippe Jacques
Lipopeoptides are amphiphilic compounds combining interesting physicochemical properties and biological activities. Due to their high foaming capacity in aerated bioreactor, the development of scalable bioprocesses for their production is a major bottleneck. In addition, the genes involved in the biosynthesis of these lipopeptides are mainly regulated by the quorum sensing, a global regulatory mechanism depending on cell density and known to be activated in biofilms. Several approaches have thus been considered in literature taking into account two criteria, on one side, to favor, control or avoid foam formation and on the other side, to use planktonic or immobilized (biofilm) cells...
June 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28631481/3d-graphene-ni-foam-as-an-advanced-electrode-for-high-performance-non-aqueous-redox-flow-batteries
#2
Kyubin Lee, Jungkuk Lee, Kyeong-Woo Kwon, Min-Sik Park, Jin-Ha Hwang, Ki Jae Kim
Electrodes composed of multi-layered graphene grown on a metal foam (GMF) were prepared by directly growing multi-layer graphene sheets on a three-dimensional (3D) Ni-foam substrate via a self-catalyzing chemical vapor deposition process. The multi-layer graphene sheets are successfully grown on the Ni-foam substrate surface, maintaining the unique 3D macroporous structure of the Ni foam. The potential use of GMF electrodes in non-aqueous redox flow batteries (RFBs) is carefully examined using [Co(bpy)3]+/2+ and [Fe(bpy)3]2+/3+ redox couples...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28629091/polyurethane-silica-hybrid-foams-from-a-one-step-foaming-reaction-coupled-with-a-sol-gel-process-for-enhanced-wound-healing
#3
Eun-Ho Song, Seol-Ha Jeong, Ji-Ung Park, Sukwha Kim, Hyoun-Ee Kim, Juha Song
Polyurethane (PU)-based dressing foams have been widely used due to their excellent water absorption capability, optimal mechanical properties, and unequaled economic advantage. However, the low bioactivity and poor healing capability of PU limit the applications of PU dressings in complex wound healing cases. To resolve this problem, this study was carried out the hybridization of bioactive silica nanoparticles with PU through a one-step foaming reaction that is coupled with the sol-gel process. The hybridization with silica did not affect the intrinsically porous microstructure of PU foams with silica contents of up to 10wt% and where 5-60nm silica nanoparticles were well dispersed in the PU matrix, despite slight agglomerations...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28621675/the-regulation-of-immune-cells-by-lactobacilli-a-potential-therapeutic-target-for-anti-atherosclerosis-therapy
#4
REVIEW
Ya-Hui Ding, Lin-Yan Qian, Jie Pang, Jing-Yang Lin, Qiang Xu, Li-Hong Wang, Dong-Sheng Huang, Hai Zou
Atherosclerosis is an inflammatory disease regulated by several immune cells including lymphocytes, macrophages and dendritic cells. Gut probiotic bacteria like Lactobacilli have been shown immunomodificatory effects in the progression of atherogenesis. Some Lactobacillus stains can upregulate the activity of regulatory T-lymphocytes, suppress T-lymphocyte helper (Th) cells Th1, Th17, alter the Th1/Th2 ratio, influence the subsets ratio of M1/M2 macrophages, inhibit foam cell formation by suppressing macrophage phagocytosis of oxidized low-density lipoprotein, block the activation of the immune system with dendritic cells, which are expected to suppress the atherosclerosis-related inflammation...
June 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28618986/inflammatory-and-oxidative-stress-markers-as-indicator-of-atherogenesis-in-rats-antioxidants-as-preventive-pharmacological-methods
#5
Maria Del Carmen Baez, Mariana Tarán, María de La Paz Scribano, Ariel Balceda, Carla Buonanotte, Sergio Blencio, Ismael Fonseca, Monica Moya
The oxidative process in atherogenesis generated by proinflammatory induction and response to antioxidants vitamins in an experimental model were analyzed. METHODS: Male rats were used: (A)Control, (B)Control+vitamin E plus C, (C)Hyperfibrinogenemia and (D)Hyperfibrinogenemia+vitamins E plus C. Hyperfibrinogenemia induced by daily injection of adrenaline (0.1mg/day/rat) for 120 days. TREATMENT: 3.42 mg/kg of vitamin E plus 2.14 mg/kg of vitamin C, fifteen days after induction...
June 16, 2017: Anti-inflammatory & Anti-allergy Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28612525/-the-role-of-dna-double-strain-damage-repairing-mechanisms-in-diabetic-atheroscolersis
#6
Li Zeng, Qun-Fang Ding, Ting-Yuan Xu, Fang Luo, Ning Ge, Shi-Tong Li
OBJECTIVES: To identify the role of DNA double-strain damage repairing pathway in the development of diabetics atherosclerosis. METHODS: Wistar male rats were randomly divided into three groups: control group (group A), balloon injury group (group B) and diabetes + balloon injury group (group C). Streptozotocin (STZ) was injected into rat abdomen to induce diabetes. After stabilizing high glucose, rats in group B and group C were both under aortic balloon injury technique and fed high lipid forage post-operatively...
March 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28612495/graphdiyne-supported-nico2-s4-nanowires-a-highly-active-and-stable-3d-bifunctional-electrode-material
#7
Yurui Xue, Zicheng Zuo, Yongjun Li, Huibiao Liu, Yuliang Li
The oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting are major energy and chemical conversion efforts. Progress in electrocatalytic reactions have shown that the future is limitless in many fields. However, it is urgent to develop efficient electrocatalysts. Here, the first graphdiyne-supported efficient and bifunctional electrocatalyst is reported using 3D graphdiyne foam as scaffolds, and NiCo2 S4 nanowires as building blocks (NiCo2 S4 NW/GDF). NiCo2 S4 NW/GDF exhibits outstanding catalytic activity and stability toward both OER and HER, as well as overall water splitting in alkaline media...
June 14, 2017: Small
https://www.readbyqxmd.com/read/28610841/hsp27-promotes-abca1-expression-and-cholesterol-efflux-through-the-pi3k-pkc%C3%AE-sp1-pathway-in-thp-1-macrophages
#8
Hai-Jun Kuang, Guo-Jun Zhao, Wu-Jun Chen, Min Zhang, Gao-Feng Zeng, Xi-Long Zheng, Chao-Ke Tang
Heat shock protein 27 (Hsp27) is a putative biomarker and therapeutic target in atherosclerosis. This study was to explore the potential mechanisms underlying Hsp27 effects on ATP-binding cassette transporter A1 (ABCA1) expression and cellular cholesterol efflux. THP-1 macrophage-derived foam cells were infected with adenovirus to express wild-type Hsp27, hyper-phosphorylated Hsp27 mimic (3D Hsp27), antisense Hsp27 or hypo-phosphorylated Hsp27 mimic (3A Hsp27). Wild-type and 3D Hsp27 were found to up-regulate ABCA1 mRNA and protein expression and increase cholesterol efflux from cells...
June 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28609175/center-for-the-polyurethanes-industry-summary-of-unpublished-industrial-hygiene-studies-related-to-the-evaluation-of-emissions-of-spray-polyurethane-foam-insulation
#9
Richard D Wood
Spray polyurethane foam (SPF) insulation is used as thermal insulation for residential and commercial buildings. It has many advantages over other forms insulation; however, concerns have been raised related to chemical emissions during and after application. The American Chemistry Council's (ACC's) Center for the Polyurethanes Industry (CPI) has gathered previously unpublished industrial hygiene air sampling studies submitted by member companies that were completed during an eight year period from 2007 to 2014...
June 13, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28604361/synthetic-scaffolds-with-full-pore-interconnectivity-for-bone-regeneration-prepared-by-supercritical-foaming-using-advanced-biofunctional-plasticizers
#10
Aurelio Salerno, Sara Diéguez, Luis Diaz-Gomez, Jose Luis Gomez-Amoza, Beatriz Magariños, Angel Concheiro, Concepcion Domingo, Carmen Alvarez-Lorenzo, Carlos A García-González
Supercritical foaming allows for the solvent-free processing of synthetic scaffolds for bone regeneration. However, the control on the pore interconnectivity and throat pore size with this technique still needs to be improved. The use of plasticizers may help to overcome these limitations. Eugenol, a GRAS natural compound extracted from plants, is proposed in this work as an advanced plasticizer with bioactive properties. Eugenol-containing poly(ɛ-caprolactone) (PCL) scaffolds were obtained by supercritical foaming (20...
June 12, 2017: Biofabrication
https://www.readbyqxmd.com/read/28602962/microrna-20a-b-regulates-cholesterol-efflux-through-post-transcriptional-repression-of-atp-binding-cassette-transporter-a1
#11
Bin Liang, Xin Wang, Xiaosu Song, Rui Bai, Huiyu Yang, Zhiming Yang, Chuanshi Xiao, Yunfei Bian
ATP-binding cassette transporter A1 (ABCA1) plays a crucial role in reverse cholesterol transport and exhibits anti-atherosclerosis effects. Some microRNAs (miRs) regulate ABCA1 expression, and recent studies have shown that miR-20a/b might play a critical role in atherosclerotic diseases. Here, we attempted to clarify the potential contribution of miR-20a/b in post-transcriptional regulation of ABCA1, cholesterol efflux, and atherosclerosis. We performed bioinformatics analysis and found that miR-20a/b was highly conserved and directly bound to ABCA1 mRNA with low binding free energy...
June 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28602913/trpv4-calcium-permeable-channel-is-a-novel-regulator-of-oxidized-ldl-induced-macrophage-foam-cell-formation
#12
Rishov Goswami, Michael Merth, Shweta Sharma, Mazen O Alharbi, Helim Aranda-Espinoza, Xiaoping Zhu, Shaik O Rahaman
Cardiovascular disease is the number one cause of death in United States, and atherosclerosis, a chronic inflammatory arterial disease, is the most dominant underlying pathology. Macrophages are thought to orchestrate atherosclerosis by generating lipid-laden foam cells and by secreting inflammatory mediators. Emerging data support a role for a mechanical factor, e.g., matrix stiffness, in regulation of macrophage function, vascular elasticity, and atherogenesis. However, the identity of the plasma membrane mechanosensor and the mechanisms by which pro-atherogenic signals are transduced/maintained are unknown...
June 8, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28602294/probing-the-specificity-of-polyurethane-foam-as-a-solid-phase-extractant-extractability-governing-molecular-attributes-of-lipophilic-phenolic-compounds
#13
Jie Han, Zhi Cao, Wei Qiu, Wei Gao, Jiangyong Hu, Baoshan Xing
The long-proposed use of open-cell polyurethane foam (PUF) as a convenient 'solid-phase extractant' for aqueous organic compounds has been hindered by a critical lack of understanding on the underlying specificity of its extraction mechanism. In this work, we tasked ourselves to understand the hierarchy of molecular structure, properties, and partitioning characteristics of compounds in PUF and aqueous phase by targeting lipophilic phenolic compounds (LPCs) as a group of primary targets for PUF extraction. Using six structurally related bisphenol analogs as comparative probes, we identified molecular lipophilicity and H-bond acidity as key molecular attributes that governed their extractability by PUF...
September 1, 2017: Talanta
https://www.readbyqxmd.com/read/28601639/tofacitinib-ameliorates-atherosclerosis-and-reduces-foam-cell-formation-in-apoe-deficient-mice
#14
Zaicun Wang, Shumei Wang, Zunzhe Wang, Tiantian Yun, Chenchen Wang, Huating Wang
Atherosclerosis is a chronic inflammatory cardiovascular disease with high mortality worldwide. Tofacitinib (CP-690,550), an oral small-molecule Janus kinase inhibitor, has been shown to be effective in the treatment of rheumatoid arthritis, autoimmune encephalomyelitis and ulcerative colitis. However, its protective effect against atherosclerosis remains poorly understood. The aim of the present study was to evaluate the effects of Tofacitinib on atherogenic diet (ATD)-induced atherosclerosis using apolipoprotein E deficient (apoE-/-) mice...
June 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28600950/histamine-promotes-the-differentiation-of-macrophages-from-cd11b-myeloid-cells-and-formation-of-foam-cells-through-a-stat6-dependent-pathway
#15
Lili Xu, Dengfeng Cheng, Zheyong Huang, Suling Ding, Weiwei Zhang, Hui Tan, Hongcheng Shi, Ruizhen Chen, Yunzeng Zou, Timothy C Wang, Xiangdong Yang, Junbo Ge
BACKGROUND AND AIMS: The enzyme histidine decarboxylase (Hdc), which generates histamine, is highly expressed in CD11b(+)Gr-1(+) myeloid cells that play a critical role in infection, inflammation and tumorigenesis. The aim of this study was to explore the role of Hdc-expressing CD11b(+) myeloid cells or histamine in atherogenesis. METHODS: Hdc-EGFP bacterial artificial chromosome (BAC) transgenic reporter mice (Hdc-EGFP) were used to track Hdc expression during the development of atherosclerosis...
May 23, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28596507/let-7g-suppresses-both-canonical-and-non-canonical-nf-%C3%AE%C2%BAb-pathways-in-macrophages-leading-to-anti-atherosclerosis
#16
Yung-Song Wang, Edward Hsi, Hsin-Yun Cheng, Shih-Hsien Hsu, Yi-Chu Liao, Suh-Hang H Juo
Transformation of macrophages to foam cells contributes to atherosclerosis. Here, we report that let-7g reduces macrophage transformation and alleviates foam cell apoptosis by suppressing both canonical and non-canonical NF-κB pathways. In the canonical pathway, let-7g inhibits phosphorylation of IKKβ and IκB, down-regulates SREBF2 and miR-33a, and up-regulates ABCA1. In the non-canonical pathway, let-7g directly knocks down MEKK1, IKKα and ablates IKKα phosphorylation. Let-7g's effects in macrophages can be almost completely blocked by inactivation of NF-κB signaling, which suggests that let-7g's effects are primarily mediated through the suppression of NF-κB pathways...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28594401/upconversion-nanoparticle-mediated-photodynamic-therapy-induces-autophagy-and-cholesterol-efflux-of-macrophage-derived-foam-cells-via-ros-generation
#17
Xiaobo B Han, Hongxia X Li, Yueqing Q Jiang, Hao Wang, Xuesong S Li, Jiayuan Y Kou, Yinghong H Zheng, Zhongni N Liu, Hong Li, Jing Li, Dou Dou, You Wang, Ye Tian, Liming M Yang
Macrophage-derived foam cells are a major component of atherosclerotic plaques and have an important role in the progression of atherosclerotic plaques, thus posing a great threat to human health. Photodynamic therapy (PDT) has emerged as a therapeutic strategy for atherosclerosis. Here, we investigated the effect of PDT mediated by upconversion fluorescent nanoparticles encapsulating chlorin e6 (UCNPs-Ce6) on the cholesterol efflux of THP-1 macrophage-derived foam cells and explored the possible mechanism of this effect...
June 8, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28592934/new-dressing-combination-for-the-treatment-of-partial-thickness-burn-injuries-in-children
#18
G Józsa, E Tóth, Zs Juhász
Burns are among the most common causes of injury in children. Several wound dressings are available to conservatively treat second-degree burns. Seventy-three children were treated with Aquacel Ag foam and Zn-hyaluronon gel to determine their effectiveness on partial thickness burns. We applied silver nitrate solution on 25% of patients for 24 hrs, then checked burn depth. If the burn was superficial second degree, we applied the dressing under study. All dressings were removed 6-7 days later. In the remaining children we used Aquacel Ag foam dressing with Zn-hyaluronon gel at first intervention...
March 31, 2017: Annals of Burns and Fire Disasters
https://www.readbyqxmd.com/read/28578965/preparation-and-evaluation-of-polyurethane-cellulose-nanowhisker-bimodal-foam-nanocomposites-for-osteogenic-differentiation-of-hmscs
#19
Ehsan Shahrousvand, Mohsen Shahrousvand, Marzieh Ghollasi, Ehsan Seyedjafari, Iman Sahebi Jouibari, Amir Babaei, Ali Salimi
Biocompatible and biodegradable polyurethanes (PUs) based on polycaprolactone diol (PCL) were prepared and filled with cellulose nanowhiskers (CNWs) obtained from wastepaper. The incorporated polyurethane nanocomposites were used to prepare foamed scaffolds with bimodal cell sizes through solvent casting/particulate leaching method. Sodium chloride and sugar porogens were also prepared to fabricate the scaffolds. The mechanical and thermal properties of PU/CNW nanocomposites were investigated. Incorporation of different CNWs resulted in various structures with tunable mechanical properties and biodegradability...
September 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28578625/glomerular-lipidosis-in-dogs
#20
Rebecca A Kohnken, Hayley Amerman, Cathy A Brown, Eva Furrow, George E Lees, Rachel E Cianciolo
Glomerular lipidosis (GL) is characterized by dilated glomerular capillary loops containing lipid-laden cells (foam cells). Previously, GL was considered to be an incidental finding because affected dogs were typically not azotemic. However, the International Renal Interest Society staging system for canine chronic kidney disease has increased the awareness of other clinical parameters (eg, proteinuria and hypertension) that should be included in the assessment of renal function. As such, the aim of this study was to determine clinical abnormalities and concurrent renal lesions in dogs with GL...
January 1, 2017: Veterinary Pathology
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