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https://www.readbyqxmd.com/read/29334665/i-7ab-inhibited-the-growth-of-tnbc-cells-via-targeting-hdac3-and-promoting-the-acetylation-of-p53
#1
Mei Yang, Xuefei Dang, Yue Tan, Meixing Wang, Xiaojing Li, Gang Li
Triple negative breast cancer (TNBC) is a heterogenous disease with high aggressive and poor outcome. The lack of biomarkers and targeted therapies makes it a challenge for the treatment of TNBC. Histone deacetylase inhibitors (HDACis) are emerging as novel anti-tumor agents in many types of human cancers. In this study, we found that I-7ab, a novel HDACi, inhibited the cell viability of TNBC cells and induced the cell apoptosis. Mechanistically, I-7ab specifically decreased the expression of HDAC3 and promoted the acetylation of p53 at both Lys373 and Lys382 amino acids...
January 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29334383/a-simple-method-for-determining-the-ligand-affinity-toward-a-zinc-enzyme-model-by-using-a-tamra-tamra-interaction
#2
Hiroshi Kusamoto, Akio Shiba, Masaya Tsunehiro, Haruto Fujioka, Emiko Kinoshita-Kikuta, Eiji Kinoshita, Tohru Koike
Thiolate coordination to zinc(ii) ions occurs widely in such functional biomolecules as zinc enzymes or zinc finger proteins. Here, we introduce a simple method for determining the affinity of ligands toward the zinc-enzyme active-center model tetramethylrhodamine (TAMRA)-labeled 1,4,7,10-tetraazacyclododecane (cyclen)-zinc(ii) complex (TAMRA-ZnL). The 1 : 1 complexation of TAMRA-labeled cysteine (TAMRA-Cys) with TAMRA-ZnL (each at 2.5 μM), in which the TAMRA moieties approach one another closely, induces remarkable changes in the visible absorption and fluorescence spectra at pH 7...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29334239/antimicrobial-and-antiquorum-sensing-activity-of-ricinus-communis-extracts-and-ricinine-derivatives
#3
Mai H El-Naggar, Abdelaziz Elgaml, Fatma M Abdel Bar, Farid A Badria
Ricinine (1), a known major alkaloid in Ricinus communis plant, was used as a starting compound for the synthesis of six ricinine derivatives; two new and four known compounds. The new derivatives; 3-amino-5-methyl-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (2), and 3-amino-5-methyl-1-(phenylsulfonyl)-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (3), as well as the previously prepared derivatives (4-7) were subjected for antimicrobial and antiquorum-sensing evaluation in comparison to different R. communis extracts. Acetyl ricininic acid derivative (5) showed the highest antimicrobial activity among all tested derivatives against Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeuroginosa and Candida albicans...
January 15, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29333829/-galactosialidosis-a-new-de-novo-mutation-in-ctsa-gene-in-a-patient-with-late-infantile-galactosialidosis
#4
Lara García Hernández, Javier Sierra Sirvent, Laura Gort Mas, María J Coll Roseli
Galactosialidosis (OMIM #256540) is an autosomal recessive lysosomal storage disorder caused by mutations in the CTSA gene, which encodes the protective protein cathepsin A. The loss of function of this protein causes a secondarily deficiency of beta-galactosidase and N-acetyl-a-neuraminidase enzymes activities. We describe the clinical, biochemical and molecular analysis of a case report with a phenotype compatible with the late infantile form. The biochemical analysis reveled deficiencies of beta-galactosidase and neuraminidase activities in dried blood spot and fibroblasts and the molecular study showed two missense mutations in the CTSA gene: a previously reported mutation, p...
February 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29333034/antinociceptive-and-anti-inflammatory-effects-of-triterpenes-from-pluchea-quitoc-dc-aerial-parts
#5
Francisco Alcione Nobre da Silva, Sônia Maria de Farias Freire, Marilene Oliveira da Rocha Borges, Francisco Erivaldo Vidal Barros, Maria da de Sousa, Maria Nilce de Sousa Ribeiro, Giselle Maria Skelding Pinheiro Guilhon, Adolfo Henrique Müller, Antonio Carlos Romão Borges
Background: Pluchea quitoc DC. (Asteraceae), a medicinal plant known as "quitoco," "caculucage," "tabacarana" and "madre-cravo," is indicated for inflammatory conditions such as bronchitis, arthritis, and inflammation in the uterus and digestive system. Objective: This study evaluated the analgesic and anti-inflammatory activities of the triterpenes compounds obtained from P. quitoc aerial parts. Materials and Methods: The triterpenes compounds β-amyrin, taraxasterol and pseudo-taraxasterol in a mixture (T); β-amyrin, taraxasterol and pseudo-taraxasterol acetates in a mixture (Ta); β-amyrin, taraxasterol, pseudo-taraxasterol acetates in a mixture with β-amyrin, taraxasterol and pseudo-taraxasterol myristates (Tafe) were analyzed in the models of nociception and inflammation...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29333010/sinusoidal-obstruction-syndrome-during-treatment-for-wilms-tumor-a-life-threatening-complication
#6
Sidharth Totadri, Amita Trehan, Deepak Bansal, Richa Jain
Context: Survival rates exceed 90% in Wilms' tumor (WT). Actinomycin-D (ACT-D) which is indispensable in the management of WT is associated with the development of sinusoidal obstruction syndrome (SOS), a potentially fatal complication. Aims: The aim is to study the presentation, management, and outcome of SOS complicating ACT-D administration in WT. Settings and Design: Retrospective file review conducted in a Pediatric Hematology-Oncology unit...
October 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29332593/facile-synthesis-crystal-structure-dft-calculation-and-biological-activities-of-4-2-fluorophenyl-3-3-methoxybenzyl-1h-1-2-4-triazol-5-4h-one-5
#7
Muhammad Saleem, Muhammad Rafiq, Yeon Ki Jeong, Dae Won Cho, Chong-Hyeak Kim, Sung-Yum Seo, Chang-Shik Choi, Seong-Karp Hong, Ki-Hwan Lee
BACKGROUND: In the past few decades, the design, synthesis and characterization of novel heterocyclic compounds with auspicious biological profile received the considerable attention of scientific community. Among them, the small and simple organic molecular backbone like triazole moiety have broad spectrum of applications in the medicinal as well as diagnostic areas. OBJECTIVE: The objective of present study was the synthesis, characterization and exploration of biological profile of 4-(2-fluorophenyl)-3-(3-methoxybenzyl)-1H-1,2,4-triazol-5(4H)-one (5)...
January 12, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29332244/structural-insights-into-the-function-of-elongator
#8
REVIEW
Udit Dalwadi, Calvin K Yip
Conserved from yeast to humans, Elongator is a protein complex implicated in multiple processes including transcription regulation, α-tubulin acetylation, and tRNA modification, and its defects have been shown to cause human diseases such as familial dysautonomia. Elongator consists of two copies of six core subunits (Elp1, Elp2, Elp3, Elp4, Elp5, and Elp6) that are organized into two subcomplexes: Elp1/2/3 and Elp4/5/6 and form a stable assembly of ~ 850 kDa in size. Although the catalytic subunit of Elongator is Elp3, which contains a radical S-adenosyl-L-methionine (SAM) domain and a putative histone acetyltransferase domain, the Elp4/5/6 subcomplex also possesses ATP-modulated tRNA binding activity...
January 13, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29331880/preventive-effects-of-indole-3-carbinol-against-alcohol-induced-liver-injury-in-mice-via-antioxidant-anti-inflammatory-and-anti-apoptotic-mechanisms-role-of-gut-liver-adipose-tissue-axis
#9
Youngshim Choi, Mohamed A Abdelmegeed, Byoung-Joon Song
Indole-3-carbinol (I3C), found in Brassica family vegetables, exhibits antioxidant, anti-inflammatory, and anti-cancerous properties. Here, we aimed to evaluate the preventive effects of I3C against ethanol (EtOH)-induced liver injury and study the protective mechanism(s) by using the well-established chronic-plus-binge alcohol exposure model. The preventive effects of I3C were evaluated by conducting various histological, biochemical, and real-time PCR analyses in mouse liver, adipose tissue, and colon, since functional alterations of adipose tissue and intestine can also participate in promoting EtOH-induced liver damage...
December 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29331588/antagonism-of-cysteinyl-leukotriene-receptor-1-cysltr1-by-montelukast-suppresses-cell-senescence-of-chondrocytes
#10
Wei Song, Yumin Zhang, Jun Wang, Tao Ma, Linjie Hao, Kunzheng Wang
Aging is closely associated with osteoarthritis (OA). Although its underlying mechanisms remain unknown, cellular senescence in chondrocytes has become an important therapeutic target for the treatment of OA. Cysteinyl leukotriene receptors (cysLTRs) mediate the pathobiological function of cysteinyl leukotrienes (cysLTs). However, the roles of cysLTRs in the pathogenesis of OA have not been reported before. In the current study, we found that cysLTR1 but not cysLTR2 is expressed in human primary chondrocytes...
January 10, 2018: Cytokine
https://www.readbyqxmd.com/read/29331537/preparation-of-acetylated-nanofibrillated-cellulose-from-corn-stalk-microcrystalline-cellulose-and-its-reinforcing-effect-on-starch-films
#11
Li Cheng, Dongli Zhang, Zhengbiao Gu, Zhaofeng Li, Yan Hong, Caiming Li
Acetylated nanofibrillated cellulose (ANFC) with different degrees of substitution (DS) was prepared from corn-stalk microcrystalline cellulose (MCC) using chemical-mechanical combined processes. The physicochemical properties of nanofibrillated cellulose (NFC) and ANFC were investigated together with the influence of added nanoparticles on the mechanical properties of starch films. The acetylation reaction was monitored by Fourier transform infrared (FT-IR) and titration. Particle size and morphological of NFC and ANFC were studied by atomic force microscope (AFM)...
January 10, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29330693/the-enhanced-biomass-and-lipid-accumulation-in-coccomyxa-subellipsoidea-with-an-integrated-treatment-strategy-initiated-by-brewery-effluent-and-phytohormones
#12
Tingting Liu, Fei Luo, Zhenyao Wang, Yuqin Li
Brewery effluent (BE) as an appreciable and sustainable resource presented new possibilities in low-cost algal biomass production, whereas the relatively low essential macronutrients hindered extensive applications as growth medium for microalgae cultivation. The objective of this study was to investigate the feasibility of an integrated treatment strategy initiated by BE coupling phytohormones in augmenting biomass and lipid accumulation in Coccomyxa subellipsoidea. Results revealed that BE coupling synthetic 1-naphthaleneacetic acid (NAA) accomplished the favorable lipid productivity of 481...
January 12, 2018: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29330620/impact-of-sirtuin-1-expression-on-h3k56-acetylation-and-oxidative-stress-a-double-blind-randomized-controlled-trial-with-resveratrol-supplementation
#13
Simona Bo, Gabriele Togliatto, Roberto Gambino, Valentina Ponzo, Giusy Lombardo, Rosalba Rosato, Maurizio Cassader, Maria Felice Brizzi
AIMS: Sirtuin-1 (SIRT-1) down-regulation in type 2 diabetes mellitus (T2DM) has been associated with epigenetic markers of oxidative stress. We herein aim to evaluate whether an increase in SIRT-1 expression affects histone 3 acetylation at the 56 lysine residue (H3K56ac) in T2DM patients randomly selected to receive either resveratrol (40 mg or 500 mg) or a placebo for 6 months. The primary outcome is changes in the H3K56ac level by variation in SIRT-1 expression and the secondary outcome is the evidence of association between SIRT-1 level, antioxidant markers (TAS), and metabolic variables...
January 12, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29330215/mir-195-regulates-metabolism-in-failing-myocardium-via-alterations-in-sirt3-expression-and-mitochondrial-protein-acetylation
#14
Xiaokan Zhang, Ruiping Ji, Xianghai Liao, Estibaliz Castillero, Peter J Kennel, Danielle L Brunjes, Marcus Franz, Sven Möbius-Winkler, Konstantinos Drosatos, Isaac George, Emily I Chen, Paolo C Colombo, P Christian Schulze
Background -Heart failure (HF) leads to mitochondrial dysfunction and metabolic abnormalities of the failing myocardium coupled with an energy-depleted state and cardiac remodeling. The mitochondrial deacetylase sirtuin 3 (SIRT3) plays a pivotal role in the maintenance of mitochondrial function through regulating the mitochondrial acetylome. Interestingly, unique cardiac and systemic miRNAs have been shown to play an important role in cardiac remodeling by modulating key signaling elements in the myocardium...
January 12, 2018: Circulation
https://www.readbyqxmd.com/read/29329830/theoretical-research-in-structure-characteristics-of-different-inhibitors-and-differences-of-binding-modes-with-cbp-bromodomain
#15
Xue-Song Wang, Qing-Chuan Zheng
The CBP (CREB (cAMP responsive element binding protein) binding protein) bromodomain (BRD) could recognize and bind with acetyl K382 of human tumor suppressor protein p53 which the mutation of encoding gene might cause human cancers. CBP-BRD serves as a promising drug target for several disease pathways and a series of effective drug have been discovered. In this study, molecular dynamics (MD) simulations and molecular mechanics generalized born surface area (MM-GB/SA) approaches were performed to investigate the different binding modes between five inhibitors with CBP-BRD...
December 26, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29329583/correction-to-dendrimer-mediated-delivery-of-n-acetyl-cysteine-to-microglia-in-a-mouse-model-of-rett-syndrome
#16
Elizabeth Nance, Siva P Kambhampati, Elizabeth S Smith, Zhi Zhang, Fan Zhang, Sarabdeep Singh, Michael V Johnston, Rangaramanujam M Kannan, Mary E Blue, Sujatha Kannan
After publication of the article [1], it has been brought to our attention that an author's name has been formatted incorrectly.
January 12, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29329563/pm2-5-induced-oxidative-stress-increases-intercellular-adhesion-molecule-1-expression-in-lung-epithelial-cells-through-the-il-6-akt-stat3-nf-%C3%AE%C2%BAb-dependent-pathway
#17
Chen-Wei Liu, Tzu-Lin Lee, Yu-Chen Chen, Chan-Jung Liang, Shu-Huei Wang, June-Horng Lue, Jaw-Shiun Tsai, Shih-Wei Lee, Shun-Hua Chen, Yi-Fan Yang, Tzu-Yi Chuang, Yuh-Lien Chen
BACKGROUND: Epidemiological studies have shown that ambient air pollution is closely associated with increased respiratory inflammation and decreased lung function. Particulate matters (PMs) are major components of air pollution that damages lung cells. However, the mechanisms remain to be elucidated. This study examines the effects of PMs on intercellular adhesion molecule-1 (ICAM-1) expression and the related mechanisms in vitro and in vivo. RESULT: The cytotoxicity, reactive oxygen species (ROS) generation, and monocyte adherence to A549 cells were more severely affected by treatment with O-PMs (organic solvent-extractable fraction of SRM1649b) than with W-PMs (water-soluble fraction of SRM1649b)...
January 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29329215/dietary-supplement-of-large-yellow-tea-ameliorates-metabolic-syndrome-and-attenuates-hepatic-steatosis-in-db-db-mice
#18
Yun Teng, Daxiang Li, Ponmari Guruvaiah, Na Xu, Zhongwen Xie
Yellow tea has been widely recognized for its health benefits. However, its effects and mechanism are largely unknown. The current study investigated the mechanism of dietary supplements of large yellow tea and its effects on metabolic syndrome and the hepatic steatosis in male db/db mice. Our data showed that dietary supplements of large yellow tea and water extract significantly reduced water intake and food consumption, lowered the serum total and low-density lipoprotein cholesterol and triglyceride levels, and significantly reduced blood glucose level and increased glucose tolerance in db/db mice when compared to untreated db/db mice...
January 12, 2018: Nutrients
https://www.readbyqxmd.com/read/29329013/antiobesity-effect-of-lactobacillus-reuteri-263-associated-with-energy-metabolism-remodeling-of-white-adipose-tissue-in-high-energy-diet-fed-rats
#19
Li-Han Chen, Yi-Hsing Chen, Kuan-Chen Cheng, Ting-Yi Chien, Ching-Hung Chan, Shu-Ping Tsao, Hui-Yu Huang
Obesity is a serious and costly issue to the medical welfare worldwide. Probiotics have been suggested as one of the candidates to resolve the obesity-associated problems, but how they combat obesity is not fully understood. Herein, we investigated the effects of Lactobacillus reuteri 263 (L. reuteri 263) on antiobesity using four groups of Sprague-Dawley rats (n=10/group), namely, C (normal diet with vehicle treatment), HE [high-energy diet (HED) with vehicle treatment], 1X (HED with 2.1×109 CFU/kg/day of L...
November 16, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29328974/novel-approach-for-evaluating-pharmaceuticals-toxicity-using-daphnia-model-analysis-of-the-mode-of-cytochrome-p450-generated-metabolite-action-after-acetaminophen-exposure
#20
Ryeo-Ok Kim, Min-A Jo, Jinhaeng Song, Il-Chan Kim, Seokjoo Yoon, Woo-Keun Kim
Because of its widespread use, the pharmaceutical acetaminophen (APAP) is frequently detected in aquatic environments. APAP can have serious physiological effects, such as reduced reproduction, low growth rates, and abnormal behavior, in aquatic organisms. However, the methods available for evaluation of the aquatic toxicity of APAP are of limited usefulness. The present study aimed to develop reliable and sensitive markers for evaluation of APAP toxicity using Daphnia as a model organism. We focused on N-acetyl-p-benzoquinoneimine (NAPQI) production from APAP via cytochrome P450 metabolism because NAPQI causes APAP toxicity...
December 30, 2017: Aquatic Toxicology
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