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https://www.readbyqxmd.com/read/29899284/sensitivity-of-yeast-mutants-deficient-in-mitochondrial-or-vacuolar-abc-transporters-to-pathogenesis-related-protein-tc-pr-10-of-theobroma-cacao
#1
Louise R Barreto, Thayná Barreto, Sonia Melo, Cristina Pungartnik, Martin Brendel
Pathogenesis-related proteins (PRs) are induced in plants after infection by pathogens and/or abiotic stress. Among these proteins, the family 10 (PR-10) influences the biosynthesis of secondary metabolites and shows antimicrobial ribonuclease activity. Tc PR-10p (Pathogenesis-related Protein 10 of Theobroma cacao ) was isolated from resistant and susceptible Moniliophthora perniciosa cacao cultivars. Cell survival with Saccharomyces cerevisiae mutant lines deficient in ATP-binding cassette (ABC) transporter proteins indicated the influence on resistance to Tc PR-10p...
June 13, 2018: Biology
https://www.readbyqxmd.com/read/29884904/drug-targeting-of-nr4a-nuclear-receptors-for-treatment-of-acute-myeloid-leukemia
#2
Seth P Boudreaux, Ryan P Duren, Steven G Call, Loc Nguyen, Pablo R Freire, Padmini Narayanan, Michele S Redell, Orla M Conneely
NR4As are AML tumor suppressors that are frequently silenced in human acute myeloid leukemia (AML). Despite their potential as novel targets for therapeutic intervention, mechanisms of NR4A silencing and strategies for their reactivation remain poorly defined. Here we show that NR4A silencing in AML occurs through blockade of transcriptional elongation rather than epigenetic promoter silencing. By intersection of NR4A-regulated gene signatures captured upon acute, exogenous expression of NR4As in human AML cells with in silico chemical genomics screening, we identify several FDA-approved drugs including dihydroergotamine (DHE) that reactivate NR4A expression and regulate NR4A-dependent gene signatures...
June 8, 2018: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29861832/the-role-of-tlr4-on-pgc-1-%C3%AE-mediated-oxidative-stress-in-tubular-cell-in-diabetic-kidney-disease
#3
Shuguang Yuan, Xuemei Liu, Xuejing Zhu, Zhong Qu, Zailiang Gong, Jun Li, Li Xiao, Yuan Yang, Hong Liu, Lin Sun, Fuyou Liu
The role and precise mechanism of TLR4 in mitochondria-related oxidative damage and apoptosis of renal tubules in diabetic kidney disease (DKD) remain unclear. We examined the expression of TLR4 in renal biopsy tissues. Db/db diabetic mice and HK-2 cells cultured under high glucose (HG) were used as in vivo and vitro models. Real-time RT-PCR, Western blot, and immunohistochemistry were performed to examine the mRNA and protein levels of TLR4, NF- κ Β, PGC-1 α , cytochrome C, and cleaved caspase-3. ATP level, activity of electron transport chain complex III, and antioxidant enzymes were investigated for mitochondrial function...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29844673/mechanisms-of-oxidative-stress-apoptosis-and-autophagy-involved-in-graphene-oxide-nanomaterial-anti-osteosarcoma-effect
#4
Zhibing Tang, Lin Zhao, Zaixing Yang, Zhaohui Liu, Jia Gu, Bing Bai, Jinlian Liu, Jiaying Xu, Huilin Yang
Background: Graphene and its derivative graphene oxide (GO) have been implicated in a wide range of anticancer effects. Purpose: The objective of this study was to systematically evaluate the toxicity and underlying mechanisms of GO on two osteosarcoma (OSA) cancer cell lines, MG-63 and K7 M2 cells. Methods: MG-63 and K7 M2 cells were treated by GO (0-50 µg/mL) for various time periods. Cell viability was tested by MTT and Live/Dead assays...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29812950/shotgun-proteomics-and-quantitative-pathway-analysis-of-the-mechanisms-of-action-of-dehydroeffusol-a-bioactive-phyto-chemical-with-anti-cancer-activity-from-juncus-effusus
#5
I-Sheng Chang, Lai-King Sy, Bei Cao, Ching Tung Lum, Wai-Lun Kwong, Yi-Man Eva Fung, Chun-Nam Lok, Chi-Ming Che
Dehydroeffusol (DHE) is a phenanthrene isolated from Chinese medicine Juncus effusus. Biological evaluation of DHE reveals in vitro and in vivo anticancer effects. We performed a shotgun proteomic analysis using liquid chro-matography-tandem mass spectrometry to investigate the changes in the protein profiles in cancer cells upon DHE treatment. DHE affected cancer-associated signaling pathways, including NF-κB, β-catenin and endoplasmic reticulum stress. Through quantitative pathway and key-node analysis of the proteomics data, activating transcription factor 2 (ATF-2) and c-Jun kinase (JNK) were found to be the key components in DHE's modulated biological pathways...
May 29, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29802544/dihydroergotamine-inhibits-the-vasodepressor-sensory-cgrpergic-outflow-by-prejunctional-activation-of-%C3%AE-2-adrenoceptors-and-5-ht-1-receptors
#6
Abimael González-Hernández, Jair Lozano-Cuenca, Bruno A Marichal-Cancino, Antoinette MaassenVanDenBrink, Carlos M Villalón
BACKGROUND: Dihydroergotamine (DHE) is an antimigraine drug that produces cranial vasoconstriction and inhibits trigeminal CGRP release; furthermore, it inhibits the vasodepressor sensory CGRPergic outflow, but the receptors involved remain unknown. Prejunctional activation of α2A/2C -adrenergic, serotonin 5-HT1B/1F , or dopamine D2 -like receptors results in inhibition of this CGRPergic outflow. Since DHE displays affinity for these receptors, this study investigated the pharmacological profile of DHE-induced inhibition of the vasodepressor sensory CGRPergic outflow...
May 25, 2018: Journal of Headache and Pain
https://www.readbyqxmd.com/read/29734167/protective-effect-of-nicotinamide-adenine-dinucleotide-phosphate-on-renal-ischemia-reperfusion-injury
#7
Xiao-Fen Weng, Song-Tao Li, Qi Song, Qi Zhu, Dan-Dan Song, Zheng-Hong Qin, Yan Xie
BACKGROUND/AIMS: Renal ischemia-reperfusion injury (IRI) is a common consequence of acute kidney injury. Nicotinamide adenine dinucleotide phosphate (NADPH), which is derived from the pentose phosphate pathway, is essential for the proper functioning of essential redox and antioxidant defense systems. Previous studies have indicated that NADPH is responsible for protecting the brain from ischemic injury. The goal of this study was to analyze the protective function of NADPH in renal IRI...
May 3, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29729330/paraoxonase-2-prevents-the-development-of-heart-failure
#8
Wei Li, David Kennedy, Zhili Shao, Xi Wang, Andre Klaassen Kamdar, Malory Weber, Kayla Mislick, Kathryn Kiefer, Rommel Morales, Brendan Agatisa-Boyle, Diana M Shih, Srinivasa T Reddy, Christine S Moravec, W H Wilson Tang
BACKGROUND: Mitochondrial oxidation is a major source of reactive oxygen species (ROS) and mitochondrial dysfunction plays a central role in development of heart failure (HF). Paraoxonase 2 deficient (PON2-def) mitochondria are impaired in function. In this study, we tested whether PON2-def aggravates HF progression. METHODS AND RESULTS: Using qPCR, immunoblotting and lactonase activity assay, we demonstrate that PON2 activity was significantly decreased in failing hearts despite increased PON2 expression...
May 2, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29723491/qsox1-a-novel-actor-of-cardiac-protection-upon-acute-stress-in-mice
#9
Anais Caillard, Malha Sadoune, Arthur Cescau, Mehdi Meddour, Marine Gandon, Evelyne Polidano, Claude Delcayre, Kelly Da Silva, Philippe Manivet, Ana-Maria Gomez, Alain Cohen-Solal, Nicolas Vodovar, Zhenlin Li, Alexandre Mebazaa, Jane-Lise Samuel
QSOX1, a sulfhydryl oxidase, was shown to be upregulated in the heart upon acute heart failure (AHF). The aim of the study was to unravel QSOX1 roles during AHF. We generated and characterized mice with QSOX1 gene deletion. The QSOX1-/- mice were viable but adult male exhibited a silent dilated cardiomyopathy. The QSOX1-/- hearts were characterized by low protein SERCA2a levels associated with a calcium homeostasis alteration, high levels of the endoplasmic reticulum (ER) chaperone proteins Grp78/Bip, and of the ER apoptosis sensor CHOP, indicating a chronic unfolded protein response (UPR)...
April 30, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29721673/linagliptin-prevents-atrial-electrical-and-structural-remodeling-in-a-canine-model-of-atrial-fibrillation
#10
Tazuru Igarashi, Shinichi Niwano, Hiroe Niwano, Tomoharu Yoshizawa, Hironori Nakamura, Hidehira Fukaya, Tamami Fujiishi, Naruya Ishizue, Akira Satoh, Jun Kishihara, Masami Murakami, Junya Ako
Dipeptidyl peptidase 4 (DPP-4) inhibitors have recently been reported to exhibit additional cardioprotective effects; however, their effect in atrial remodeling, such as in atrial fibrillation (AF), remains unclear. In this study, the effect of linagliptin on atrial electrical and structural remodeling was evaluated in a canine AF model. Sixteen beagle dogs with 3-week atrial rapid stimulation were divided into the linagliptin group (9 mg/kg/day, n = 8) and pacing control group (n = 8). Three additional dogs without rapid pacing were assigned into non-pacing group, which was used as sham in this study...
May 2, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29699927/mtorc1-dependent-increase-in-oxidative-metabolism-in-pomc-neurons-regulates-food-intake-and-action-of-leptin
#11
Magalie Haissaguerre, Amandine Ferrière, Vincent Simon, Nicolas Saucisse, Nathalie Dupuy, Caroline André, Samantha Clark, Omar Guzman-Quevedo, Antoine Tabarin, Daniela Cota
OBJECTIVE: Nutrient availability modulates reactive oxygen species (ROS) production in the hypothalamus. In turn, ROS regulate hypothalamic neuronal activity and feeding behavior. The mechanistic target of rapamycin complex 1 (mTORC1) pathway is an important cellular integrator of the action of nutrients and hormones. Here we tested the hypothesis that modulation of mTORC1 activity, particularly in Proopiomelanocortin (POMC)-expressing neurons, mediates the cellular and behavioral effects of ROS...
April 13, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29665365/dehydroeffusol-inhibits-viability-and-epithelial-mesenchymal-transition-through-the-hedgehog-and-akt-mtor-signaling-pathways-in-neuroblastoma-cells
#12
Kang He, Guoqing Duan, Yanyang Li
Neuroblastoma (NB) is the most predominant extracranial solid tumor of infancy in the world. However, current chemotherapy has limited efficacy for more advanced stages of NB due to acquired chemoresistance or acute toxicity in NB patients. Therefore, effective novel anti-NB drugs are desperately needed. The present study aimed to investigate the effects of dehydroeffusol (DHE), a phenanthrene isolated from J. effuses, on NB cells and its underlying mechanism. The results showed that DHE treatment effectively inhibited NB cell viability in a dose-dependent manner...
June 15, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29657902/inhibitory-effects-of-angiotensin-ii-receptor-blockade-on-human-tenon-fibroblast-migration-and-reactive-oxygen-species-production-in-cell-culture
#13
Duri Kim, Ushasree Pattamatta, Elizabeth Kelly, Paul R Healey, Nicole Carnt, Hans Zoellner, Andrew J R White
Purpose: We investigate the effect of angiotensin receptor blockade on the migration of human Tenon fibroblasts (HTF), using irbesartan, an angiotensin II receptor type 1 (AT1R) blocker (ARB) as a potential antifibrotic agent in glaucoma filtration surgery. Methods: Confluent HTF cultures were scratched with a 1 mL pipette tip and treated with either irbesartan (10, 50, and 100 μg/mL) or angiotensin II (2 μg/mL). The extent of HTF migration up to 30 hours, and cell number and morphology at 72 hours was evaluated...
April 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29650417/%C3%AE-aminoisobutyric-acid-accelerates-the-proliferation-and-differentiation-of-mc3t3-e1-cells-via-moderate-activation-of-ros-signaling
#14
Xiao-Wen Zhu, Kai Ding, Xiao-Yu Dai, Wei-Qi Ling
BACKGROUD: Osteoporosis is one of the bone-metabolic diseases associated with decreased bone renewal and bone mineral density. β-aminoisobutyric acid (BAIBA), a natural thymine catabolite, can reduce inflammation in skeletal muscle and alleviate hepatic endoplasmic reticulum stress. However, the roles of BAIBA in osteoblast proliferation and differentiation remain largely unknown. METHODS: The cultured MC3T3-E1 cells received various treatments in this study, including BAIBA alone, H2 O2 alone, BAIBA plus N-acetyl-l-cysteine and BAIBA plus apocynin...
July 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29611065/ros-induced-autophagy-reduces-b16f10-melanoma-cell-proliferative-activity
#15
Gustavo Miranda Pires Santos, Susana C P S Oliveira, Juliana C S Monteiro, Sandra R Fagnani, Fernando Pires Sampaio, Neandder Andrade Correia, Pedro J L Crugeira, Antonio L B Pinheiro
Cancer is a pathology characterized by increased cell progression and/or reduced programmed cell death. Melanoma shows a rapid increase in cell progression and its resistance to chemotherapy is associated with uncontrolled apoptosis and to mechanisms that increase the flow of the drug out of the cell. The objective of this study was to evaluate the effects of photodynamic therapy (PDT) on the cell proliferation and cellular alterations in B16F10 murine melanoma. For that, four experimental groups were evaluated: the control group; laser group (ʎ = 660 ηm, 40 mW, 2...
April 2, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29592844/anti-oxidative-and-anti-apoptotic-effects-of-acupuncture-role-of-thioredoxin-1-in-the-hippocampus-of-vascular-dementia-rats
#16
Wen Zhu, Xue-Rui Wang, Si-Qi Du, Chao-Qun Yan, Na-Na Yang, Lu-Lu Lin, Guang-Xia Shi, Cun-Zhi Liu
Emerging evidence suggests that acupuncture treatment has anti-oxidative effects that affect cognitive impairment in vascular dementia (VD) rats. In the present study, we aimed to investigate whether thioredoxin-1 (Trx-1)/thioredoxin reductase-1 (TrxR-1) was involved in the beneficial effects of acupuncture. After 2-weeks of acupuncture treatment, Morris water maze (MWM), dihydroethidium (DHE) staining, Nissl staining and TdT-mediated dUTP nick end labeling (TUNEL) staining were used to assess the effects of acupuncture on cognitive function and hippocampal neuronal injury in two-vessel occlusion (2VO) model...
May 21, 2018: Neuroscience
https://www.readbyqxmd.com/read/29580834/niemann-pick-c2-protein-regulates-sterol-transport-between-plasma-membrane-and-late-endosomes-in-human-fibroblasts
#17
Zane Berzina, Lukasz M Solanko, Ahmed S Mehadi, Maria Louise V Jensen, Frederik W Lund, Maciej Modzel, Maria Szomek, Katarzyna A Solanko, Alice Dupont, Gitte Krogh Nielsen, Christian W Heegaard, Christer S Ejsing, Daniel Wüstner
Niemann-Pick disease type C2 is a lipid storage disorder in which mutations in the NPC2 protein cause accumulation of lipoprotein-derived cholesterol in late endosomes and lysosomes (LE/LYSs). Whether cholesterol delivered by other means to NPC2 deficient cells also accumulates in LE/LYSs is currently unknown. We show that the close cholesterol analog dehydroergosterol (DHE), when delivered to the plasma membrane (PM) accumulates in LE/LYSs of human fibroblasts lacking functional NPC2. We measured two different time scales of sterol diffusion; while DHE rich LE/LYSs moved by slow anomalous diffusion in disease cells (D ∼ 4...
July 2018: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29571735/regional-up-regulation-of-nox2-contributes-to-the-differential-vulnerability-of-outer-hair-cells-to-neomycin
#18
Meihao Qi, Yang Qiu, Xueying Zhou, Keyong Tian, Ke Zhou, Fei Sun, Bo Yue, Fuquan Chen, Dingjun Zha, Jianhua Qiu
In hearing loss induced by aminoglycoside antibiotics, the outer hair cells (OHCs) in the basal turn are always more susceptible than OHCs in the apical turn, while the underlying mechanisms remain unknown. In this study, we reported that NAPDH oxidase 2 (NOX2) played an important role in the OHCs damage preferentially in the basal turn. Normally, NOX2 was evenly expressed in OHCs among different turns, at a relatively low level. However, after neomycin treatment, NOX2 was dominantly induced in OHCs in the basal turn...
June 2, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29563825/improvement-of-skin-conditions-by-ingestion-of-aspergillus-kawachii-koji-extract-containing-14-dehydroergosterol-in-a-randomized-double-blind-controlled-trial
#19
Yoshihiko Sugihara, Shigehito Ikushima, Mika Miyake, Takayoshi Kirisako, Yukihiro Yada, Daisuke Fujiwara
Purpose: The present study examined the effect of ingestion of Koji extract containing 14-dehydroergosterol (14-DHE), prepared from Aspergillus kawachii NBRC4308, on improvement of skin conditions among healthy volunteers. Subjects and methods: In a randomized, double-blind, placebo-controlled, parallel-group study, 70 healthy adult women who felt that their skin was dry ingested either a placebo dietary supplement or Koji extract (200 mg/day) supplement containing 0...
2018: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/29521149/protective-properties-of-geniposide-against-uv-b-induced-photooxidative-stress-in-human-dermal-fibroblasts
#20
Daehyun Shin, Sihyeong Lee, Yu-Hua Huang, Hye-Won Lim, Yoonjin Lee, Kyounghee Jang, Yongwan Cho, Sang Jun Park, Dae-Duk Kim, Chang-Jin Lim
CONTEXT: Geniposide (genipin-1-O-β-d-glucoside) is a major bioactive ingredient in the fruits of gardenia [Gardenia jasminoides J. Ellis (Rubiaceae)], a traditional herbal medicine in Asian countries. OBJECTIVE: This work assesses the skin anti-photoaging potential of geniposide in human dermal fibroblasts under UV-B irradiation. MATERIALS AND METHODS: The anti-photoaging property of geniposide, at varying concentrations (5, 12 and 30 μM) treated for 30 min prior to UV-B irradiation, was evaluated by analysing reactive oxygen species (ROS), promatrix metalloproteinase-2 (proMMP-2), glutathione (GSH), superoxide dismutase (SOD), nuclear factor erythroid 2-related factor 2 (Nrf2) and cellular viability...
December 2018: Pharmaceutical Biology
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