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parp 1

Yinping Tong, Gongye Zhang, Yang Li, Jiajia Xu, Jiahui Yuan, Bing Zhang, Tianhui Hu, Gang Song
Corilagin is a component of Phyllanthus urinaria extract and has been found of possessing anti-inflammatory, anti-oxidative, and anti-tumour properties in clinic treatments. However, the underlying mechanisms in anti-cancer particularly of its induction of cell death in human breast cancer remain undefined. Our research found that corilagin-induced apoptotic and autophagic cell death depending on reactive oxygen species (ROS) in human breast cancer cell, and it occurred in human breast cancer cell (MCF-7) only comparing with normal cells...
June 19, 2018: Journal of Cellular and Molecular Medicine
K Nishida, T Matsushita, K Takayama, T Tanaka, N Miyaji, K Ibaraki, D Araki, N Kanzaki, T Matsumoto, R Kuroda
Objectives: This study aimed to examine the effects of SRT1720, a potent SIRT1 activator, on osteoarthritis (OA) progression using an experimental OA model. Methods: Osteoarthritis was surgically induced by destabilization of the medial meniscus in eight-week-old C57BL/6 male mice. SRT1720 was administered intraperitoneally twice a week after surgery. Osteoarthritis progression was evaluated histologically using the Osteoarthritis Research Society International (OARSI) score at four, eight, 12 and 16 weeks...
March 2018: Bone & Joint Research
Jean Christopher Chamcheu, Islam Rady, Roxane-Cherille N Chamcheu, Abu Bakar Siddique, Melissa B Bloch, Sergette Banang Mbeumi, Abiola S Babatunde, Mohammad B Uddin, Felicite K Noubissi, Peter W Jurutka, Yong-Yu Liu, Vladimir S Spiegelman, G Kerr Whitfield, Khalid A El Sayed
Non-melanoma skin cancers (NMSCs) are the leading cause of skin cancer-related morbidity and mortality. Effective strategies are needed to control NMSC occurrence and progression. Non-toxic, plant-derived extracts have been shown to exert multiple anti-cancer effects. Graviola ( Annona muricata ), a tropical fruit-bearing plant, has been used in traditional medicine against multiple human diseases including cancer. The current study investigated the effects of graviola leaf and stem extract (GLSE) and its solvent-extracted fractions on two human NMSC cell lines, UW-BCC1 and A431...
June 16, 2018: International Journal of Molecular Sciences
Roberto Marques Damiani, Dinara Jaqueline Moura, Cassiana Macagnan Viau, Verônica Brito, Ana Moira Morás, João Antonio Pêgas Henriques, Jenifer Saffi
Doxorubicin (DOX) and Mitoxantrone (MTX) are very effective drugs for a range of tumors despite being highly cardiotoxic. DNA topoisomerase 2 beta (Top2ß) was revealed as key mediator of DOX-induced cardiotoxicity, although ROS generation is also an important mechanism. Oxidative stress is also an important issue in MTX-induced cardiotoxicity that is manifested by mitochondrial dysfunction. Studies have demonstrated the relationship between PARP-1 overactivation and cell viability in DOX-treated cardiomyocytes...
June 15, 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
Souhaila Choul-Li, Arnaud J Legrand, Dorothée Vicogne, Vincent Villeret, Marc Aumercier
The Ets-1 transcription factor plays an important role in various physiological and pathological processes. These diverse roles of Ets-1 are likely to depend on its interaction proteins. We have previously showed that Ets-1 interacted with DNA-dependent protein kinase (DNA-PK) complex including its regulatory subunits, Ku70 and Ku86 and with poly (ADP-ribose) polymerase-1 (PARP-1). In this study, the binding domains for the interaction between Ets-1 and these proteins were reported. We demonstrated that the interaction of Ets-1 with DNA-PK was mediated through the Ku70 subunit and was mapped to the C-terminal region of Ets-1 and the C-terminal part of Ku70 including SAP domain...
June 18, 2018: Bioscience, Biotechnology, and Biochemistry
Ghulam Mohammad, Saleh Hamed Alrashed, Abdullah Ibrahim Almater, Mohammad Mairaj Siddiquei, Ahmed M Abu El-Asrar
PURPOSE: To examine the effects of poly(ADP-ribose)polymerase-1 (PARP-1) inhibitor 1,5-isoquinolinediol (IQ) on nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-derived oxidative stress in diabetic retina. METHODS: Streptozotocin-induced diabetic rats were treated with IQ. The NADPH oxidase enzyme activity was determined by luminometer. Expression of gp91phox , P47phox and nitrated proteins was examined by western blot. Interaction between gp91phox and P47phox was determined by coimmunoprecipitation...
June 18, 2018: Journal of Ocular Pharmacology and Therapeutics
Mario Menk, Jan Adriaan Graw, Deniz Poyraz, Nadine Möbius, Claudia D Spies, Clarissa von Haefen
Background: Chronic alcohol consumption is a major cause of liver injury. However, the molecular mechanisms by which alcohol impairs hepatocellular function and induces cell death remain unclear. Macroautophagy (hereafter called 'autophagy') is a degradation pathway involved in the survival or death of cells during conditions of cellular stress. This study examines the effect of chronic alcohol consumption on hepatocellular autophagy in an animal model. Methods: During a 12-week period male Wistar rats were fed a Lieber-DeCarli diet containing 5% alcohol (EtOH group; n=10), or an isocaloric diet (control group; n=10)...
2018: International Journal of Medical Sciences
Xiao Jiang, Ning Zhang, Li Yin, Wen-Long Zhang, Fei Han, Wen-Bin Liu, Hong-Qiang Chen, Jia Cao, Jin-Yi Liu
Roundup® is extensively used for weed control worldwide. Residues of this compound may lead to side effects of the male reproductive system. However, the toxic effects and mechanisms of Roundup® of male germ cells remain unclear. We aimed to investigate the apoptosis-inducing effects of Roundup® on mouse male germ cells and explore the role of a novel tumor suppressor XAF1 (X-linked inhibitor of apoptosis-associated factor 1) involved in this process. We demonstrated that Roundup® can impair spermatogenesis, decrease sperm motility and concentration, and increase the sperm deformity rate in mice...
June 14, 2018: Toxicology Letters
M Catherine Pietanza, Saiama N Waqar, Lee M Krug, Afshin Dowlati, Christine L Hann, Alberto Chiappori, Taofeek K Owonikoko, Kaitlin M Woo, Robert J Cardnell, Junya Fujimoto, Lihong Long, Lixia Diao, Jing Wang, Yevgeniva Bensman, Brenda Hurtado, Patricia de Groot, Erik P Sulman, Ignacio I Wistuba, Alice Chen, Martin Fleisher, John V Heymach, Mark G Kris, Charles M Rudin, Lauren Averett Byers
Purpose Both temozolomide (TMZ) and poly (ADP-ribose) polymerase (PARP) inhibitors are active in small-cell lung cancer (SCLC). This phase II, randomized, double-blind study evaluated whether addition of the PARP inhibitor veliparib to TMZ improves 4-month progression-free survival (PFS). Patients and Methods A total of 104 patients with recurrent SCLC were randomly assigned 1:1 to oral veliparib or placebo 40 mg twice daily, days 1 to 7, and oral TMZ 150 to 200 mg/m2 /day, days 1 to 5, of a 28-day cycle until disease progression, unacceptable toxicity, or withdrawal of consent...
June 15, 2018: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
Feng Jiang, Jin-Yong Zhou, Dan Zhang, Ming-Hao Liu, Yu-Gen Chen
The present study assessed the antitumor effect of artesunate (ART) in vitro and in vivo, as well as its underlying mechanism of action in HCT116 colon cancer cells. An MTT assay, DAPI staining, flow cytometry, western blotting, immunohistochemistry, transmission electron microscopy and TUNEL assay were performed to study the molecular mechanism underlying the antitumor effects of ART in HCT116 colon cancer cells. ART was observed to inhibit proliferation by inducing the apoptosis of HCT116 cells both in vitro and in vivo...
June 1, 2018: International Journal of Molecular Medicine
Gyeong-Ji Kim, Hyeon-Ju Jo, Kwon-Jai Lee, Jeong Woo Choi, Jeung Hee An
We evaluated oleanolic acid (OA)-induced anti-cancer activity, apoptotic mechanism, cell cycle status, and MAPK kinase signaling in DU145 (prostate cancer), MCF-7 (breast cancer), U87 (human glioblastoma), normal murine liver cell (BNL CL.2) and human foreskin fibroblast cell lines (Hs 68). The IC50 values for OA-induced cytotoxicity were 112.57 in DU145, 132.29 in MCF-7, and 163.60 in U87 cells, respectively. OA did not exhibit toxicity in BNL CL. 2 and Hs 68 cell lines in our experiments. OA, at 100 µg/mL, increased the number of apoptotic cells to 27...
May 29, 2018: Oncotarget
Xiaotao Xu, Qingwei Zhu, Fangfang Niu, Rong Zhang, Yan Wang, Wenying Wang, Dawei Sun, Xintao Wang, Aizhong Wang
The epithelial barrier of the lung is destroyed during acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) due to the apoptosis of alveolar epithelial cells (AECs). Therefore, treatments that block AEC apoptosis might be a therapeutic strategy to ameliorate ALI. Based on recent evidence, A2B adenosine receptor (A2BAR) plays an important role in ALI in several different animal models, but its exact function in AECs has not been clarified. We investigated the role of A2BAR in AEC apoptosis in a mouse model of oleic acid (OA)-induced ALI and in hydrogen peroxide (H2 O2 )-induced AEC (A549 cells and MLE-12 cells) injury...
June 13, 2018: American Journal of Physiology. Cell Physiology
Yan Yuan, Yajing Zhang, Shiwen Zhao, Jie Chen, Jinlong Yang, Tao Wang, Hui Zou, Yi Wang, Jianhong Gu, Xuezhong Liu, Jianchun Bian, Zongping Liu
Cadmium (Cd) is a toxic metal capable of damaging brain. Studies have demonstrated that Cd can induce apoptosis in neuronal cells. The CD95/APO-1 (Fas)/Fas Ligand (FasL) signaling pathway is one of the primary apoptosis pathways, but the role and regulatory mechanism of this pathway in neuronal cells remain unclear. Here, we demonstrated the underlying mechanism of the Fas/FasL system involving the mitochondrial apoptotic pathway in neuronal cells. Primary rat cerebral cortical neurons and PC12 cells were exposed to Cd, which significantly activated expression of Fas, FasL, Fas-associated death domain (FADD) and cleaved caspase-8...
June 11, 2018: Scientific Reports
Takashi Ishii, Hiroshi Hayakawa, Tatsuhiro Igawa, Takeshi Sekiguchi, Mutsuo Sekiguchi
In aerobically growing cells, the guanine base of RNA is oxidized to 8-oxo-7,8-dihydroguanine (8-oxoG), which induces alteration in their gene expression. We previously demonstrated that the human AUF1 protein binds to 8-oxoG in RNA to induce the selective degradation of oxidized messenger RNA. We herein report that the poly(C)-binding protein PCBP1 binds to more severely oxidized RNA to activate apoptosis-related reactions. While AUF1 binds to oligoribonucleotides carrying a single 8-oxoG, PCBP1 does not bind to such oligoribonucleotides but instead binds firmly to oligoribonucleotides in which two 8-oxoG residues are located nearby...
June 11, 2018: Proceedings of the National Academy of Sciences of the United States of America
Gui-Hua Lai, Ai-Lan Huang, Zhi Zhao, Xing-Hao Lu, Wen-Xuan Zu
OBJECTIVE: To investigate the tumor-suppressing effect of microRNA-218 (miR-218) in osteosarcoma (OS) and explore its molecular mechanism. METHODS: We examined the expression levels of miR-218 in 68 pairs of OS and adjacent tissue samples using qRT-PCR. Cultured human OS cell line Saos-2 was transfected with miR-218 mimics or anti-miR-218 mimics, and the cell apoptosis was assessed using CCK-8 assay, annexin V-FITC staining and Western blotting. We also analyzed the potential functional targets of miR-218 in Saos-2 cells using luciferase assay, qRT-PCR and Western blotting...
May 20, 2018: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
Shenglin Fang, Xiaonan Yu, Haoxuan Ding, Jianan Han, Jie Feng
Iron overload causes many diseases, while the underlying etiologies of these diseases are unclear. Cell death processes including apoptosis, necroptosis, cyclophilin D-(CypD)-dependent necrosis and a recently described additional form of regulated cell death called ferroptosis, are dependent on iron or iron-dependent reactive oxygen species (ROS). However, whether the accumulation of intracellular iron itself induces ferroptosis or other forms of cell death is largely elusive. In present study, we study the role of intracellular iron overload itself-induced cell death mechanisms by using ferric ammonium citrate (FAC) and a membrane-permeable Ferric 8-hydroxyquinoline complex (Fe-8HQ) respectively...
June 8, 2018: Biochemical and Biophysical Research Communications
Einat Bigelman, Lena Cohen, Genya Aharon-Hananel, Ran Levy, Zach Rozenbaum, Ann Saada, Gad Keren, Michal Entin-Meer
BACKGROUND: Mitochondria hold crucial importance in organs with high energy demand especially the heart. We investigated whether chronic kidney disease (CKD), which eventually culminates in cardiorenal syndrome, could affect cardiac mitochondria and assessed the potential involvement of angiotensin II (AngII) in the process. METHODS: Male Lewis rats underwent 5/6 nephrectomy allowing CKD development for eight months or for eleven weeks. Short-term CKD rats were administered with AngII receptor blocker (ARB)...
2018: PloS One
Liza Douiev, Ann Saada
Mitochondrial cytochrome c oxidase (COX, respiratory chain complex IV), contributes to ATP production via oxidative phosphorylation (OXPHOS). Clinical presentation of COX deficiency is heterogeneous ranging from mild to severe neuromuscular diseases. Anemia is among the symptoms and we have previously reported Fanconi anemia like features in COX4-1 deficiency, suggesting genomic instability and our preliminary results detected nuclear double stranded DNA breaks (DSB). We now quantified the DSB by phospho histone H2AX Ser139 staining of COX4-1 and COX6B1 deficient fibroblasts (225% and 215% of normal, respectively) and confirmed their occurrence by neutral comet assay...
June 7, 2018: Biochimica et Biophysica Acta
Yessenia Valverde, Raghuvaran Narayanan, Satish B Alapati, Fanny Chmilewsky, Chun-Chieh Huang, Sriram Ravindran, Seung H Chung
INTRODUCTION: The nuclear enzyme poly(adenosine phosphate ribose) polymerase 1 (PARP-1) has been implicated in the maintenance and differentiation of several stem cells. The role of PARP-1 in dental pulp stem cell (DPSC) differentiation, especially in the context of its ability to modulate nerve regeneration factors, has not been investigated. Regeneration of neuronal components in pulp tissue is important for the assessment of tooth vitality. Brain-derived neurotrophic factor (BDNF) is known to play an integral signaling factor during nerve regeneration...
June 5, 2018: Journal of Endodontics
Michael Untch, Rachel Würstlein, Norbert Marschner, Diana Lüftner, Doris Augustin, Susanne Briest, Johannes Ettl, Renate Haidinger, Lothar Müller, Volkmar Müller, Eugen Ruckhäberle, Nadia Harbeck, Christoph Thomssen
The fourth international advanced breast cancer consensus conference (ABC4) on the diagnosis and treatment of advanced breast cancer (ABC) headed by Professor Fatima Cardoso was once again held in Lisbon on November 2 - 4, 2017. To simplify matters, the abbreviation ABC will be used hereinafter in the text. In clinical practice, the abbreviation corresponds to metastatic breast cancer or locally far-advanced disease. This year the focus was on new developments in the treatment of ABC. Topics discussed included the importance of CDK4/6 inhibition in hormone receptor (HR)-positive ABC, the use of dual antibody blockade to treat HER2-positive ABC, PARP inhibition in triple-negative ABC and the potential therapeutic outcomes...
May 2018: Geburtshilfe und Frauenheilkunde
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