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https://www.readbyqxmd.com/read/28654658/butyrate-modifies-intestinal-barrier-function-in-ipec-j2-cells-through-a-selective-upregulation-of-tight-junction-proteins-and-activation-of-the-akt-signaling-pathway
#1
Hui Yan, Kolapo M Ajuwon
The intestinal epithelial barrier, composed of epithelial cells, tight junction proteins and intestinal secretions, prevents passage of luminal substances and antigens through the paracellular space. Dysfunction of the intestinal barrier integrity induced by toxins and pathogens is associated with a variety of gastrointestinal disorders and diseases. Although butyrate is known to enhance intestinal health, its role in the protection of intestinal barrier function is poorly characterized. Therefore, we investigated the effect of butyrate on intestinal epithelial integrity and tight junction permeability in a model of LPS-induced inflammation in IPEC-J2 cells...
2017: PloS One
https://www.readbyqxmd.com/read/28652797/flll32-a-curcumin-analog-ameliorates-intestinal-injury-in-necrotizing-enterocolitis
#2
Jeffrey Eckert, Brian Scott, Shelley M Lawrence, Michael Ihnat, Hala Chaaban
BACKGROUND: Necrotizing enterocolitis (NEC) is a devastating gastrointestinal disease that primarily affects premature infants. It is characterized by inflammation and leukocyte infiltration that can progress to intestinal necrosis, perforation, systemic inflammatory response, and death. In this study, we examined the effect of FLLL32, a curcumin analog, on an NEC-like neonatal intestinal injury model. METHODS: NEC was induced in CD-1 mice pups using the Paneth cell ablation and Klebsiella infection model...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28650635/ternary-interactions-and-energy-transfer-between-fluorescein-isothiocyanate-adenosine-triphosphate-and-graphene-oxide-nanocarriers
#3
Katarzyna Ratajczak, Magdalena Stobiecka
The interactions of fluorescent probes and biomolecules with nanocarriers are of key importance to the emerging targeted drug delivery systems. Graphene oxide nanosheets (GONs) as the nanocarriers offer biocompatibility and robust drug binding capacity. The interactions of GONs with fluorophores lead to strong fluorescence quenching, which may interfere with fluorescence bioimaging and biodetection. Herein, we report on the interactions and energy transfers in a model ternary system: GONs-FITC-ATP, where FITC is a model fluorophore (fluorescein isothiocyanate) and ATP is a common biomolecule (adenosine-5'-triphosphate)...
June 26, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28648038/-effects-of-na-h-exchanger-1-inhibitor-on-intestinal-injury-of-rats-with-burn-sepsis-and-the-mechanism
#4
W P Li, G Y Zhao, X K Yang
Objective: To observe the effects of Na(+) /H(+) exchanger 1 (NHE1) inhibitor on intestinal injury of rats with burn sepsis, and to explore the possible mechanism preliminarily. Methods: Ninety SD rats were divided into control group, pure sepsis group, and NHE1 inhibitor group according to the random number table, with 30 rats in each group. Full-thickness scald (hereinafter referred to as burn) model with 20% total body surface area were reproduced on the back of rats in pure sepsis and NHE1 inhibitor groups, and then 50 μL liquid of Pseudomonas aeruginosa ATCC 27853 (2×10(5) colony forming unit/mL) were injected into the center of wounds on the back...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28648016/-mechanisms-of-cytoskeleton-and-pi3k%C3%AE-rhoa-in-fine-particulate-matter-deteriorating-phagocytosis-defect-of-alveolar-macrophage-in-mice-with-chronic-obstructive-pulmonary-disease
#5
Q Xia, S T Hu, X L Zeng, H R Bao, X J Liu
Objective: To explore the mechanism of cytoskeleton and PI3Kδ-RhoA in fine particulate matter deteriorating phagocytosis defect of alveolar macrophage (AM) in chronic obstructive pulmonary disease (COPD) mice. Methods: Forty mice were randomly divided into four groups: health control group, COPD group, health PM2.5 group, COPD PM2.5 group and with ten in each group. A mouse model of COPD was established by cigarette smoke exposure, and health PM2.5 group and COPD PM2.5 group mice were given PM2.5 (588 μg/m(3)) aerosol inhalation for 90 days...
June 27, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28644059/carbonic-anhydrase-i-ii-iv-and-ix-inhibition-with-a-series-of-7-amino-3-4-dihydroquinolin-2-1h-one-derivatives
#6
Murat Bozdag, Silvia Bua, Sameh M Osman, Zeid AlOthman, Claudiu T Supuran
A series of new derivatives was prepared by derivatisation of the 7-amino moiety present in 7-amino-3,4-dihydroquinolin-2(1H)-one, a compound investigated earlier as CAI. The derivatisation was achieved by: i) reaction with arylsulfonyl isocyanates/aryl isocyanates; (ii) reaction with fluorescein isothiocyanate; (iii) condensation with substituted benzoic acids in the presence of carbodiimides; (iv) reaction with 2,4,6-trimethyl-pyrylium tetrafluoroborate; (v) reaction with methylsulfonyl chloride and (vi) reaction with maleic anhydride...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28643227/preparation-and-characterization-of-alginate-microparticles-containing-a-model-protein-for-oral-administration-in-gnotobiotic-european-sea-bass-dicentrarchus-labrax-larvae
#7
Eamy Nursaliza Yaacob, Jens Goethals, Aline Bajek, Kristof Dierckens, Peter Bossier, Bruno G De Geest, Daisy Vanrompay
Aquaculture is the fastest growing animal production sector. However, the production of marine fish is still hampered by the high mortality rate in the first few weeks after hatching. Mortality in larvae is often caused by microbial infections. Today, the incorporation of immunostimulants into microparticles provides us new tools to enhance disease resistance in marine larviculture. In this study, we prepared alginate microparticles loaded with the model antigen fluorescein isothiocyanate conjugated-bovine serum albumin...
June 22, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/28641156/mild-c-sp-3-h-functionalization-of-dihydrosanguinarine-and-dihydrochelerythrine-for-development-of-highly-cytotoxic-derivatives
#8
Adriana Romo-Pérez, Luis Demetrio Miranda, Alma D Chávez-Blanco, Alfonso Dueñas-González, María Del Rayo Camacho-Corona, Alejandrina Acosta-Huerta, Abraham García
A series of C(6)-substituted dihydrobenzo[c]phenanthridines were synthesized by mild copper-catalyzed C(sp(3))-H functionalization of dihydrosanguinarine (2) and dihydrochelerythrine (3) with certain nucleophiles selected to enhance cytotoxicity against human breast, colorectal, and prostate cancer cell lines. We also investigated the cytotoxicity of our previously reported C(6)-functionalized N-methyl-5,6-dihydrobenzo[c]phenanthridines 1a-1e to perform structure-activity relationship (SAR) studies. Among the target compounds, five β-aminomalonates (1a, 1b, 2a, 2b, and 3b), one α-aminophosphonate (2c), and one nitroalkyl derivative (2h) exhibited half maximal inhibitory concentration (IC50) values in the range of 0...
June 13, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28640251/inhibition-of-cancer-growth-in-vitro-and-in-vivo-by-a-novel-ros-modulating-agent-with-ability-to-eliminate-stem-like-cancer-cells
#9
Jiankang Wang, Bingling Luo, Xiaobing Li, Wenhua Lu, Jing Yang, Yumin Hu, Peng Huang, Shijun Wen
Reactive oxygen species (ROS) have a crucial role in cell signaling and cellular functions. Mounting evidences suggest that abnormal increase of ROS is often observed in cancer cells and that this biochemical feature can be exploited for selective killing of the malignant cells. A naturally occurring compound phenethyl isothiocyanate (PEITC) has been shown to have promising anticancer activity by modulating intracellular ROS. Here we report a novel synthetic analog of PEITC with superior in vitro and in vivo antitumor effects...
June 22, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28637949/comparative-analysis-of-allyl-isothiocyanate-aitc-induced-carbohydrate-oxidation-changes-via-trpv1-between-mice-and-chickens
#10
Fuminori Kawabata, Yuko Kawabata, Ruojun Liang, Shotaro Nishimura, Shoji Tabata
Postprandial hyperglycemia is a risk factor for cardiovascular diseases. It has been reported that intragastric administration of allyl isothiocyanate (AITC), which is one of the pungent ingredients of wasabi and horseradish but it is not included in hot chili pepper, increased carbohydrate oxidation and reduced postprandial increase of blood glucose via transient receptor potential vanilloid 1 (TRPV1)in mice. However, the action site of AITC on TRPV1 for increasing carbohydrate oxidation is unclear. Both mammalian and chicken TRPV1 (cTRPV1) are activated by heat and acid, but unlike its mammalian counterpart, cTRPV1 is only faintly activated by capsaicin...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28636379/a-one-pot-assembly-of-fully-substituted-alkyl-5-aminothiophene-2-carboxylates-from-allenes-isothiocyanates-and-alkyl-2-bromoacetates
#11
Nina A Nedolya, Ol'ga A Tarasova, Alexander I Albanov, Boris A Trofimov
A novel simple approach to highly functionalized multisubstituted thiophenes such as alkyl 4-alkoxy-5-amino-3-methylthiophene-2-carboxylates through the one-pot sequential reaction of α-lithiated alkoxyallenes with isothiocyanates and alkyl 2-bromoacetates has been discovered. The process proceeds quickly (30-45 min) via in situ formation and intramolecular cyclization of alkyl 2-[(2-alkoxybuta-2,3-dienimidoyl)sulfanyl]acetates (1-aza-1,3,4-trienes).
June 21, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28636236/assessment-of-silibinin-as-a-potential-antifungal-agent-and-investigation-of-its-mechanism-of-action
#12
Dae Gyu Yun, Dong Gun Lee
Silibinin, which is derived from Silybum marianum (milk thistle), has used as a traditional remedy for liver or biliary disorders and known to have superior antioxidant activity. In addition, silibinin was recently reported to have antifungal effect related to fungal apoptosis against Candida albicans and the interest in the therapeutic effect is increasing. In this study, we found another mode of antifungal action of silibinin and its antibiofilm activity on C. albicans. To investigate influence on fungal plasma membrane, propidium iodide and bis-(1, 3-dibutylbarbituric acid) trimethineoxonol [DiBAC4 (3)] assay were primarily carried out...
June 21, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28635396/microrna-34a-inhibits-tumor-invasion-and-metastasis-in-osteosarcoma-partly-by-effecting-c-iap2-and-bcl-2
#13
Jie Wen, Yan-Kun Zhao, Yan Liu, Jin-Feng Zhao
Osteosarcoma is a common primary malignant bone tumor that occurs mainly in children and adolescents. Recent evidence has demonstrated that miR-34a is involved in the invasion and metastasis of osteosarcoma. This study aims to explore the effect of biological behavior of miR-34a on osteosarcoma. First, we collect osteosarcoma and adjacent specimens, and the relative expression of miR-34a and C-IAP2 messenger RNA was quantitated by real-time polymerase chain reaction. Furthermore, miR-34a stimulant is synthesized and transfected onto osteosarcoma MG-63 cells...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28634693/rhepo-enhances-cellular-anti-oxidant-capacity-to-protect-long-term-cultured-aging-primary-nerve-cells
#14
Huqing Wang, Jiaxin Fan, Mengyi Chen, Qingling Yao, Zhen Gao, Guilian Zhang, Haiqin Wu, Xiaorui Yu
Erythropoietin (EPO) may protect the nervous system of animals against aging damage, making it a potential anti-aging drug for the nervous system. However, experimental evidence from natural aging nerve cell models is lacking, and the efficacy of EPO and underlying mechanism of this effect warrant further study. Thus, the present study used long-term cultured primary nerve cells to successfully mimic the natural aging process of nerve cells. Starting on the 11th day of culture, cells were treated with different concentrations of recombinant human erythropoietin (rhEPO)...
June 21, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28633813/multi-stimuli-responsive-smart-chitosan-based-microcapsules-for-targeted-drug-delivery-and-triggered-drug-release
#15
Xuejun Cui, Xinyu Guan, Shuangling Zhong, Jie Chen, Houjuan Zhu, Zhanfeng Li, Fengzhi Xu, Peng Chen, Hongyan Wang
In the present study, we designed a novel, multi-stimuli responsive, biocompatible and non-immunogenic smart carrier for targeted delivery and triggered release of hydrophobic drugs. The designed multi-stimuli responsive smart chitosan-based microcapsules (MSRS-CS-MCs) have been fabricated successfully from folic acid (FA) functionalized thiolated chitosan via a facile sonochemical method. Targeting moiety FA and red fluorescent dye (Rhodamine B isothiocyanate, RITC) were immobilized onto the shells of microcapsules...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633114/do-glucosinolate-hydrolysis-products-reduce-nitrous-oxide-emissions-from-urine-affected-soil
#16
S F Balvert, J Luo, L A Schipper
New Zealand agriculture is predominantly comprised of pastoral grazing systems and deposition of animal excreta during grazing has been identified as a major source of nitrous oxide (N2O) emissions. Nitrification inhibitors have been shown to significantly reduce nitrous oxide emissions from grazing pastoral systems, and some plants have been identified as having nitrification inhibiting properties. Brassica crops are one such example as they contain the secondary metabolite glucosinolate (GLS) whose hydrolysis products are thought to slow soil nitrogen cycling...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28629997/membrane-translocation-of-transient-receptor-potential-ankyrin-1-induced-by-inflammatory-cytokines-in-lung-cancer-cells
#17
Kenji Takahashi, Toshio Ohta
Transient receptor potential ankyrin 1 (TRPA1) is known as one of the nociceptors expressed in sensory neurons. It also plays a role in non-neural cells in inflammatory sites. However, the regulatory mechanisms for the reactivity of TRPA1 in these cells under inflammatory conditions are not clear. To clarify these mechanisms, we examined the effects of inflammatory cytokines (interleukin [IL]-1α, IL-1β and tumor necrosis factor α [TNFα]) on TRPA1 reactivity and expression in the endogenously TRPA1-expressing lung tumor cell line A549...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28627624/pro-oxidant-activity-of-sulforaphane-and-cisplatin-potentiates-apoptosis-and-simultaneously-promotes-autophagy-in-malignant-mesothelioma-cells
#18
Yoon-Jin Lee, Sang-Han Lee
Sulforaphane (SFN) is an isothiocyanate compound derived from glucoraphanin, which is found in cruciferous vegetables, and has been heralded as a chemopreventive and/or chemotherapeutic agent. The present study investigated the effects of SFN on enhancing the anticancer role of cisplatin (cis-dichlorodiammineplatinum; CDDP) in H‑28 malignant mesothelioma cells. At concentrations demonstrating limited toxicity in MeT‑5A normal human mesothelial cells, combination treatment with the two compounds exhibited synergistic growth‑inhibiting and apoptosis‑promoting activities, as demonstrated by a series of proapoptotic events, including reactive oxygen species accumulation, loss of mitochondrial membrane potential, upregulation of p53 expression, increased B‑cell lymphoma 2 (Bcl‑2) associated X protein/Bcl‑2 ratio, activation of caspase‑3, the occurrence of a sub‑G0/G1 peak and an increase in cells with pyknotic and fragmented nuclei, Annexin V‑phycoerythrin‑positive staining and G2/M phase‑transition delay in the cell cycle...
June 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28627341/-protective-effects-of-valproic-acid-on-gut-barrier-function-after-major-burn-injury-and-its-mechanism
#19
Hongmin Luo, Sen Hu, Huining Bian, Shaoyi Zheng, Bing Xiong, Zhifeng Huang, Zuan Liu, Chuanwei Sun, Lianghua Ma, Hanhua Li, Wen Yu, Minghua Du, Huade Chen, Wen Lai
OBJECTIVE: To investigate the potential protective effects of valproic acid (VPA) on gut barrier function after major burn injury in rats and its mechanism. METHODS: Forty male Sprague-Dawley (SD) rats were divided into sham + normal saline (NS), sham + VPA, scald + NS, and scald + VPA groups, with 10 rats in each group. Rat with 55% total body surface area (TBSA) third-degree severe-burns model was reproduced by immersing into 80 °C water, and the rats in sham groups were given sham-burns by immersing into 37 °C water...
March 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28624056/evaluating-the-efficacy-of-different-types-of-stem-cells-in-preserving-gut-barrier-function-in-necrotizing-enterocolitis
#20
Christopher J McCulloh, Jacob K Olson, Yijie Wang, Jennifer Vu, Sarah Gartner, Gail E Besner
BACKGROUND: Necrotizing enterocolitis (NEC) is a leading cause of morbidity and mortality in premature infants. Increased intestinal permeability is central to NEC development. We have shown that stem cells (SCs) can reduce the incidence and severity of NEC. Our current goal was to investigate the efficacy of four different types of SC in preservation of gut barrier function during NEC. MATERIALS AND METHODS: We compared (1) amniotic fluid-derived mesenchymal SC, (2) bone marrow-derived mesenchymal SC, (3) amniotic fluid-derived neural SC, and (4) enteric neural SC...
June 15, 2017: Journal of Surgical Research
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