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https://www.readbyqxmd.com/read/29677537/the-rescue-effect-of-mesenchymal-stem-cell-on-sodium-iodate-induced-retinal-pigment-epithelial-cell-death-through-deactivation-of-nf-%C3%AE%C2%BAb-mediated-nlrp3-inflammasome
#1
Xiying Mao, Ting Pan, Han Shen, Huiyu Xi, Songtao Yuan, Qinghuai Liu
Age-related macular degeneration (AMD) is a multifactorial disease resulting in the gradual loss of retinal pigment epithelium (RPE) and the permanent visual damage. Various risk factors, including oxidative stress, form a complex network at the confluence of inflammation. Mesenchymal stem cell (MSC) is a well-studied population of adult stem cell with strong neuroprotective and immunoregulatory properties. Here, we reported the protective effect of MSC on sodium iodate (NaIO3)-triggered RPE degeneration. Sodium iodate (NaIO3)-induced RPE cell death was remarkably reduced when cocultured with MSC...
April 17, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29677366/the-absence-of-indoleamine-2-3-dioxygenase-inhibits-retinal-capillary-degeneration-in-diabetic-mice
#2
Rooban B Nahomi, Sruthi Sampathkumar, Angela M Myers, Lynda Elghazi, Dawn G Smith, Jie Tang, C Allen Lee, Timothy S Kern, Ram H Nagaraj, Patrice E Fort
Purpose: Loss of retinal capillary endothelial cells and pericytes through apoptosis is an early event in diabetic retinopathy (DR). Inflammatory pathways play a role in early DR, yet the biochemical mechanisms are poorly understood. In this study, we investigated the role of indoleamine 2,3-dioxygenase (IDO), an inflammatory cytokine-inducible enzyme, on retinal endothelial apoptosis and capillary degeneration in the diabetic retina. Methods: IDO was detected in human and mouse retinas by immunohistochemistry or Western blotting...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677209/osteopontin-plays-a-pivotal-role-in-increasing-severity-of-respiratory-syncytial-virus-infection
#3
Viviana Sampayo-Escobar, Ryan Green, Michael B Cheung, Raminder Bedi, Subhra Mohapatra, Shyam S Mohapatra
The molecular mechanisms underlying susceptibility to severe respiratory syncytial virus (RSV) infection remain poorly understood. Herein, we report on the role of osteopontin (OPN) in regulation of RSV infection in human epithelial cells and how interleukin-1 beta (IL-1β), a cytokine secreted soon after RSV infection, when persistently expressed can induce OPN expression leading to increased viral infection. We first compared OPN expression in two human epithelial cell lines: HEK-293 and HEp-2. In contrast to HEp-2, HEK-293 expresses low levels of pro-caspase-1 resulting in decreased IL-1β expression in response to RSV infection...
2018: PloS One
https://www.readbyqxmd.com/read/29677120/the-protective-role-of-sulfated-polysaccharides-from-green-seaweed-udotea-flabellum-in-cells-exposed-to-oxidative-damage
#4
Fernando Bastos Presa, Maxsuell Lucas Mendes Marques, Rony Lucas Silva Viana, Leonardo Thiago Duarte Barreto Nobre, Leandro Silva Costa, Hugo Alexandre Oliveira Rocha
Seaweed is a rich source of bioactive sulfated polysaccharides. We obtained six sulfated polysaccharide-rich fractions (UF-0.3, UF-0.5, UF-0.6, UF-0.7, UF-1.0, and UF-2.0) from the green seaweed Udotea flabellum (UF) by proteolytic digestion followed by sequential acetone precipitation. Biochemical analysis of these fractions showed that they were enriched with sulfated galactans. The viability and proliferative capacity of 3T3 fibroblasts exposed to FeSO₄ (2 µM), CuSO₄ (1 µM) or ascorbate (2 mM) was not affected...
April 20, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29676355/the-determination-of-stage-in-nonmuscle-urothelial-carcinoma-staining-pattern-of-caspase-8
#5
Nilay Şen Türk, Saadettin Eskiçorapçi, Zafer Aybek, Levent Tuncay
Context: Urothelial carcinoma (UC) is one of the most frequent epithelial tumors worldwide. Aims: We aimed to investigate the protein expressions of caspase-8, p53, murine double minute 2 (mdm2), and p14ARF in nonmuscle UCs and to correlate the findings with clinicopathological characteristics. Settings and Design: A total of 50 patients who had pTa and pT1 tumors were analyzed. Subjects and Methods: The protein expressions of caspase-8, p53, mdm2, and p14ARF were analyzed by immunohistochemistry...
April 2018: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29676295/effects-of-parenteral-papaverine-and-piracetam-administration-on-cochlea-following-acoustic-trauma
#6
Nurcan Yurtsever Kum, Yavuz F Yilmaz, Seren G Gurgen, Rauf O Kum, Muge Ozcan, Adnan Unal
Introduction: Noise exposure, the main cause of hearing loss in countries with lot of industries, may result both in temporary or permanent hearing loss. The goal of this study was to investigate the effects of parenteral papaverine and piracetam administration following an acoustic trauma on hearing function with histopathologic correlation. Materials and Methods: Eighteen Wistar albino rats exposed to noise for 8 h in a free environment were included. We divided the study population into three groups, and performed daily intraperitoneal injections of papaverine, piracetam, and saline, respectively, throughout the study...
March 2018: Noise & Health
https://www.readbyqxmd.com/read/29676101/-protective-effect-of-polygonum-orientale-flower-extract-on-h%C3%A2-o%C3%A2-induced-oxidative-damage-of-huvec-cells
#7
Qiong Wu, Xiang-Xiang Liu, Ding-Yan Lu, Yue-Ting Li, Jia Sun, Yan-Yu Lan, Ting Liu
To investigate the protective effects and mechanism of Polygonum orientale flower extract on H₂O₂-induced oxidative damage of human umbilical vein endothelial cells (HUVEC), H₂O₂ was used to induce the oxidativestress damage on HUVEC cells and efforts were made to screen the low, medium and high drug concentrations of P.orientale flower extract. Cell viability was detected by the MTS assay. The content of lactate dehydrogenase (LDH) and malondialdehyde (MDA), and the activities of superoxidedimutase (SOD) and catalase (CAT) were detected by biochemical kits...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29675963/protective-effects-of-resveratrol-against-high-ambient-temperature-induced-spleen-dysplasia-in-broilers-through-modulating-splenic-redox-status-and-apoptosis
#8
Cheng Zhang, Kaikai Chen, Xiaohui Zhao, Zhaoyu Geng
BACKGROUND: Resveratrol has been shown to prevent high ambient temperature (HT)-induced spleen dysplasia, but the mechanisms of action are not clear. This study aims to examine the hypothesis that HT-induced spleen dysplasia may be associated with HT-induced oxidative stress and apoptosis, while resveratrol may activate Nrf2 signaling pathway and thus reduces oxidative stress and apoptosis. RESULTS: Results showed that HT caused spleen dysplasia in broilers, reflecting by the lower relative weight of spleen (P<0...
April 20, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29675573/triclosan-evoked-neurotoxicity-involves-nmdar-subunits-with-the-specific-role-of-glun2a-in-caspase-3-dependent-apoptosis
#9
Konrad A Szychowski, Agnieszka Wnuk, Joanna Rzemieniec, Małgorzata Kajta, Teresa Leszczyńska, Anna K Wójtowicz
Triclosan (TCS) is an antimicrobial agent that is used extensively in personal care and in sanitising products. A number of studies have shown the presence of TCS in different human tissues such as blood, adipose tissue, the liver, brain as well as in breast milk and urine. N-Methyl-D-aspartate receptors (NMDARs) are glutamate-gated ion channels that are widely expressed in the central nervous system and which play key roles in excitatory synaptic transmission. There is, however, no data on the involvement of NMDAR subunits in the apoptotic and neurotoxic effects of TCS...
April 19, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29675370/effect-of-senescence-marker-protein-30-on-the-proliferation-and-apoptosis-of-human-lens-epithelial-cells-sra01-04
#10
Xi Chen, Song-Man Li, Yan-Wei Li, Zi-Hao Han, Hao Liang
AIM: To study the effect of senescence marker protein 30 (SMP30) on the proliferation and apoptosis of human lens epithelial cell (HLEC) SRA01/04. METHODS: SMP30 overexpression (OE) and knock down (KD) type cell lines were cultivated by using two groups regucalcin (RGN; SMP30) lentiviral vectors (LV-RGN, LV-RGN-RNAi) and the respective negative control virus infect SRA01/04 cells. Western blot and real-time quantitative polymerase chain reaction (q-PCR) analysis were used to determine RGN overexpression and knock down efficiency...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29675024/activation-of-the-absent-in-melanoma-2-inflammasome-in-peripheral-blood-mononuclear-cells-from-idiopathic-pulmonary-fibrosis-patients-leads-to-the-release-of-pro-fibrotic-mediators
#11
Michela Terlizzi, Antonio Molino, Chiara Colarusso, Chantal Donovan, Pasquale Imitazione, Pasquale Somma, Rita P Aquino, Philip M Hansbro, Aldo Pinto, Rosalinda Sorrentino
Idiopathic pulmonary fibrosis (IPF) is a chronic fibro-proliferative disease characterized by poor prognosis, with a mean survival of ~2-3 years after definite diagnosis. The cause of IPF is still unknown but it is a heterogeneous condition in which the aberrant deposition of extracellular matrix leads to extensive lung remodeling. This remodeling is a consequence of inflammatory responses, but the mechanisms involved are poorly understood. In this study, we first analyzed a bleomycin-induced mouse model, which showed that higher expression of IL-1β, but not IL-18, was correlated to pulmonary cell infiltration and fibrosis...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29674956/mir-103-promotes-neurite-outgrowth-and-suppresses-cells-apoptosis-by-targeting-prostaglandin-endoperoxide-synthase-2-in-cellular-models-of-alzheimer-s-disease
#12
Hui Yang, Hongcai Wang, Yongwei Shu, Xuling Li
miR-103 has been reported to be decreased in brain of transgenic mouse model of Alzheimer's disease (AD) and in cerebrospinal fluid (CSF) of AD patients, while the detailed mechanism of its effect on AD is obscure, thus this study aimed to investigate the effect of miR-103 expression on neurite outgrowth and cells apoptosis as well as its targets in cellular models of AD. Blank mimic (NC1-mimic), miR-103 mimic, blank inhibitor (NC2-mimic) and miR-103 inhibitor plasmids were transferred into PC12 cellular AD model and Cellular AD model of cerebral cortex neurons which were established by Aβ1-42 insult...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29674944/dunye-guanxinning-improves-acute-myocardial-ischemia-reperfusion-injury-by-inhibiting-neutrophil-infiltration-and-caspase-1-activity
#13
Q G Zhang, S R Wang, X M Chen, H N Guo, S Ling, J W Xu
Acute myocardial infarction is the most serious manifestation of cardiovascular disease, and it is a life-threatening condition. Dunye Guanxinning (DG) is a protective traditional Chinese patent herbal medicine with high clinical efficacy and suitable for the treatment of myocardial infarction. However, the mechanism through which it is beneficial is unclear. In this study, we hypothesized that DG improves acute myocardial ischemia-reperfusion injury by inhibiting neutrophil infiltration and caspase-1 activity...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29674665/the-proximal-tubular-%C3%AE-7-nicotinic-acetylcholine-receptor-attenuates-ischemic-acute-kidney-injury-through-akt-pkc-signaling-mediated-ho-1-induction
#14
Hwajin Kim, So Ra Kim, Jihyun Je, Kyuho Jeong, Sooji Kim, Hye Jung Kim, Ki Churl Chang, Sang Won Park
Activation of the α7 nicotinic acetylcholine receptor (α7nAChR) has been shown to attenuate excessive inflammation by inhibiting proinflammatory cytokines during ischemia-reperfusion (IR) injury; however, the underlying kidney-specific molecular mechanisms remain unclear. The protective action of α7nAChR against renal IR injury was investigated using a selective α7nAChR agonist and antagonist. α7nAChR activation reduced plasma creatinine levels and tubular cell damage, whereas α7nAChR inhibition aggravated the IR-induced phenotype...
April 20, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29674607/up-regulation-of-long-noncoding-rna-sra-promotes-cell-growth-inhibits-cell-apoptosis-and-induces-secretion-of-estradiol-and-progesterone-in-ovarian-granular-cells-of-mice
#15
Yan Li, Haixu Wang, Dangxia Zhou, Ting Shuang, Haibo Zhao, Biliang Chen
BACKGROUND Increasing evidence indicates that long noncoding RNAs (LncRNAs) play a key role in multiple pathological processes. It has been shown that LncRNA steroid receptor RNA activator (SRA) is elevated in peripheral blood of patients with polycystic ovary syndrome (PCOS). The aim of this study was to assess the effect of elevated LncRNA SRA on ovarian granular cells of mice in vitro. MATERIAL AND METHODS We firstly isolated granular cells from mouse ovaries and over-expressed the LncRNA SRA by means of lentiviral transfection in this cell line...
April 20, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29674280/the-chemotherapeutic-effect-of-%C3%AE-2-himachalen-6-ol-in-chemically-induced-skin-tumorigenesis
#16
Hamid E Daaboul, Carole Dagher, Robin I Taleb, Kikki Bodman-Smith, Wassim N Shebaby, Mirvat El-Sibai, Mohamad A Mroueh, Costantine F Daher
β-2-himachalen-6-ol (HC), a novel sesquiterpene derived from Lebanese wild carrot, was shown to possess a remarkable anticancer activity. The present study investigates the in vitro anticancer activity of HC and its effect on papillomas induced using a DMBA/TPA skin carcinogenesis mouse model. HaCaT-ras II-4 epidermal squamous cell viability was assessed using WST-1 kit. Cell cycle was analyzed by flow cytometry, and pro/anti-apoptotic proteins were measured using western blot. Mice papillomas were induced by DMBA and promoted with TPA for 18 weeks...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29674274/a-novel-synthetic-curcumin-derivative-mhmm-41-induces-ros-mediated-apoptosis-and-migration-blocking-of-human-lung-cancer-cells-a549
#17
Guang-Zhou Zhou, A-Fang Li, Yan-He Sun, Gang-Chun Sun
Many curcumin derivatives were produced and characterized to improve the physiochemical instability and low solubility of curcumin. Here, MHMM-41 (a novel curcumin derivative) was used to treat non-small lung cancer cells of human (known as A549) and to identify its anti-proliferative activities. Our results suggested that MHMM-41 display no significant cytotoxicity toward normal human lung fibroblast 2BS cells and mouse embryonal fibroblast 3T3 cells. It also had better anti-proliferative activity than curcumin in A549 cells...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29674236/sub-lethal-ultraviolet-b-irradiation-and-poly-i-c-treatment-synergistically-induced-apoptosis-of-hacat-cells-through-nf-%C3%AE%C2%BAb-pathway
#18
Wuxiyar Otkur, Weiwei Liu, Jinda Wang, Xingfan Jia, Dianchao Huang, Fang Wang, Toshihiko Hayashi, Shin-Ichi Tashiro, Satoshi Onodera, Takashi Ikejima
Ultraviolet B (UVB) irradiation exerts multiple effects on skin cells, inducing apoptosis, senescence and carcinogenesis. Toll-like receptor 3, a member of pattern recognition receptors, is reported to initiate inflammation by recognizing double-strand RNA (dsRNA) released from UVB-irradiated cells. It has not been studied, however, whether apoptosis induction in UVB irradiation is attributed to TLR3 activation. Here, we report on the pro-apoptotic role of TLR3 in UVB-irradiated epidermal cells. Poly I:C, an analogue of dsRNA that activates TLR3, was used in combination with sub-lethal UVB (4...
April 16, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29674122/4-fluorobenzaldehyde-limonene-based-thiosemicarbazone-induces-apoptosis-in-pc-3-human-prostate-cancer-cells
#19
Bruna Dos Santos Rodrigues, Renato Ivan de Ávila, Polyana Lopes Benfica, Ludmila Pires Bringel, Cecília Maria Alves de Oliveira, Fábio Vandresen, Cleuza Conceição da Silva, Marize Campos Valadares
AIMS: This study evaluated parameters of toxicity and antiproliferative effects of (+)-N(1)-4-fluorobenzaldehyde-N(4)-{1-methyl-1-[(1R)-4-methylcyclohexene-3-il]-ethyl}-thiossemicarbazone (4-FTSC) in PC-3 adenocarcinoma prostate cells. MAIN METHODS: Cytotoxicity of 4-FTSC in PC-3 cells was evaluated using MTT assay. Morphology examination of PC-3 cells treated with 4-FTSC was also performed as well as the cell death mechanisms induced were investigated using flow cytometry...
April 16, 2018: Life Sciences
https://www.readbyqxmd.com/read/29673840/versatile-effects-of-magnesium-hydroxide-nanoparticles-in-plga-scaffold-mediated-chondrogenesis
#20
Kwang-Sook Park, Byoung-Ju Kim, Eugene Lih, Wooram Park, Soo-Hong Lee, Yoon Ki Joung, Dong Keun Han
Artificial scaffolds made up of various synthetic biodegradable polymers have been reported to have many advantages including cheap manufacturing, easy scale up, high mechanical strength, convenient manipulation, and molding into an unlimited variety of shapes. However, the synthetic biodegradable polymers still have the insufficiency for cartilage regeneration owing to their acidic degradation products. To reduce acidification by degradation of synthetic polymers, we incorporated magnesium hydroxide (MH) nanoparticles into porous polymer scaffold not only to effectively neutralize the acidic hydrolysate but also to minimize the structural disturbance of scaffolds...
April 16, 2018: Acta Biomaterialia
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