keyword
MENU ▼
Read by QxMD icon Read
search

Parp1 dna

keyword
https://www.readbyqxmd.com/read/28903334/base-excision-repair-imbalance-in-colorectal-cancer-has-prognostic-value-and-modulates-response-to-chemotherapy
#1
Natalia M Leguisamo, Helena C Gloria, Antonio N Kalil, Talita V Martins, Daniel B Azambuja, Lisiane B Meira, Jenifer Saffi
Colorectal cancer (CRC) is prevalent worldwide, and treatment often involves surgery and genotoxic chemotherapy. DNA repair mechanisms, such as base excision repair (BER) and mismatch repair (MMR), may not only influence tumour characteristics and prognosis but also dictate chemotherapy response. Defective MMR contributes to chemoresistance in colorectal cancer. Moreover, BER affects cellular survival by repairing genotoxic base damage in a process that itself can disrupt metabolism. In this study, we characterized BER and MMR gene expression in colorectal tumours and the association between this repair profile with patients' clinical and pathological features...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28887667/ape1-modulates-cellular-responses-to-organophosphate-pesticide-induced-oxidative-damage-in-non-small-cell-lung-carcinoma-a549-cells
#2
Shweta Thakur, Monisha Dhiman, Anil K Mantha
Monocrotophos (MCP) and chlorpyrifos (CP) are widely used organophosphate pesticides (OPPs), speculated to be linked with human pathologies including cancer. Owing to the fact that lung cells are most vulnerable to the environmental toxins, the development and progression of lung cancer can be caused by the exposure of OPPs. The present study investigates the oxidative DNA damage response evoked by MCP and CP in human non-small cell lung carcinoma A549 cells. A549 cells were exposed to MCP and CP; cytotoxicity and reactive oxygen species (ROS) generation were measured to select the non-toxic dose...
September 8, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28886188/alkylation-induced-cerebellar-degeneration-dependent-on-aag-and-parp1-does-not-occur-via-previously-established-cell-death-mechanisms
#3
Carrie M Margulies, Isaac Alexander Chaim, Aprotim Mazumder, June Criscione, Leona D Samson
Alkylating agents are ubiquitous in our internal and external environments, causing DNA damage that contributes to mutations and cell death that can result in aging, tissue degeneration and cancer. Repair of methylated DNA bases occurs primarily through the base excision repair (BER) pathway, a multi-enzyme pathway initiated by the alkyladenine DNA glycosylase (Aag, also known as Mpg). Previous work demonstrated that mice treated with the alkylating agent methyl methanesulfonate (MMS) undergo cerebellar degeneration in an Aag-dependent manner, whereby increased BER initiation by Aag causes increased tissue damage that is dependent on activation of poly (ADP-ribose) polymerase 1 (Parp1)...
2017: PloS One
https://www.readbyqxmd.com/read/28861684/curcumin-revitalizes-amyloid-beta-25-35-induced-and-organophosphate-pesticides-pestered-neurotoxicity-in-sh-sy5y-and-imr-32-cells-via-activation-of-ape1-and-nrf2
#4
Bibekananda Sarkar, Monisha Dhiman, Sunil Mittal, Anil K Mantha
Amyloid beta (Aβ) peptide deposition is the primary cause of neurodegeneration in Alzheimer's disease (AD) pathogenesis. Several reports point towards the role of pesticides in the AD pathogenesis, especially organophosphate pesticides (OPPs). Monocrotophos (MCP) and Chlorpyrifos (CP) are the most widely used OPPs. In this study, the role of MCP and CP in augmenting the Aβ-induced oxidative stress associated with the neurodegeneration in AD has been assessed in human neuroblastoma IMR-32 and SH-SY5Y cell lines...
August 31, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28856922/detection-and-delineation-of-oral-cancer-with-a-parp1-targeted-optical-imaging-agent
#5
Susanne Kossatz, Wolfgang Weber, Thomas Reiner
More sensitive and specific methods for early detection are imperative to improve survival rates in oral cancer. However, oral cancer detection is still largely based on visual examination and histopathology of biopsy material, offering no molecular selectivity or spatial resolution. Intuitively, the addition of optical contrast could improve oral cancer detection and delineation, but so far no molecularly targeted approach has been translated. Our fluorescently labeled small-molecule inhibitor PARPi-FL binds to the DNA repair enzyme poly(ADP-ribose)polymerase 1 (PARP1) and is a potential diagnostic aid for oral cancer delineation...
January 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28853108/differences-in-poly-adp-ribose-polymerase1-parp1-and-proliferative-cell-nuclear-antigen-pcna-immunoreactivity-in-patients-who-experienced-successful-and-unsuccessful-microdissection-testicular-sperm-extraction-procedures
#6
Süleyman Akarsu, Baris Büke, Seren Gülsen Gürgen, Serkan Akdemir, Funda Gode, Merve Biçer, Mustafa Agah Tekindal, Ahmet Zeki Isik
PURPOSE: The aim of this study is to evaluate expression of deoxyribonucleic acid (DNA) synthesis and repair markers in testicular tissues of azoospermic men in whom sperm retrieval could and could not be achieved as a result of microdissection testicular sperm extraction (micro-TESE) procedure. MATERIALS AND METHODS: In this prospective cohort study, testicular tissues were retrieved from 60 Non-obstructive Azoospermia (NOA) patients who underwent micro-TESE procedure...
August 29, 2017: Urology Journal
https://www.readbyqxmd.com/read/28827033/inhibition-of-parp1-activity-enhances-chemotherapeutic-efficiency-in-cisplatin-resistant-gastric-cancer-cells
#7
Qiang Wang, Jianping Xiong, Danping Qiu, Xue Zhao, Donglin Yan, Wenxia Xu, Zhangding Wang, Qi Chen, Sapna Panday, Aiping Li, Shouyu Wang, Jianwei Zhou
Cisplatin (DDP) is the first line chemotherapeutic drug for several cancers, including gastric cancer (GC). Unfortunately, the rapid development of drug resistance remains a significant challenge for the clinical application of cisplatin. There is an urgent need to develop new strategies to overcome DDP resistance for cancer treatment. In this study, four types of human GC cells have been divided into naturally sensitive or naturally resistant categories according to their responses to cisplatin. PARP1 activity (poly (ADP-ribose), PAR) was found to be greatly increased in cisplatin-resistant GC cells...
August 4, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28805810/trf2-binds-branched-dna-to-safeguard-telomere-integrity
#8
Isabelle Schmutz, Leonid Timashev, Wei Xie, Dinshaw J Patel, Titia de Lange
Although t-loops protect telomeres, they are at risk of cleavage by Holliday junction (HJ) resolvases if branch migration converts the three-way t-loop junction into four-way HJs. T-loop cleavage is repressed by the TRF2 basic domain, which binds three- and four-way junctions and protects HJs in vitro. By replacing the basic domain with bacterial-protein domains binding three- and four-way junctions, we demonstrated the in vivo relevance of branched-DNA binding. Branched-DNA binding also repressed PARP1, presumably by masking the PARP1 site in the t-loop junction...
September 2017: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/28802254/tdp1-is-critical-for-the-repair-of-dna-breaks-induced-by-sapacitabine-a-nucleoside-also-targeting-atm-and-brca-deficient-tumors
#9
Muthana Al Abo, Hiroyuki Sasanuma, Xiaojun Liu, Vinodh N Rajapakse, Shar-Yin N Huang, Evgeny Kiselev, Shunichi Takeda, William Plunkett, Yves Pommier
2'-C-cyano-2'-deoxy-1-β-D-arabino-pentofuranosylcytosine (CNDAC) is the active metabolite of the anticancer drug, sapacitabine. CNDAC is incorporated into the genome during DNA replication and subsequently undergoes beta-elimination that generates single-strand breaks with abnormal 3'-ends. Because tyrosyl-DNA phosphodiesterase 1 (TDP1) selectively hydrolyzes non-phosphorylated 3'-blocking ends, we tested its role in the repair of CNDAC-induced DNA damage. We show that cells lacking TDP1 (avian TDP1-/- DT40 cells and human TDP1 KO TSCER2 and HCT116 cells) exhibit marked hypersensitivity to CNDAC...
August 11, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28801318/from-dna-binding-to-transcriptional-activation-is-the-tale-complete
#10
Nicoletta Bobola
How transcription factors (TFs) control enhancer and promoter functions to effect changes in gene expression is an important question. In this issue, Hau et al. (2017. J. Cell Biol. https://doi.org/10.1083/jcb.201701154) show that the TALE TF MEIS recruits the histone modifier PARP1/ARTD1 at promoters to decompact chromatin and activate transcription.
September 4, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28760956/poly-adp-ribose-polymerase-1-escorts-xpc-to-uv-induced-dna-lesions-during-nucleotide-excision-repair
#11
Mihaela Robu, Rashmi G Shah, Nupur K Purohit, Pengbo Zhou, Hanspeter Naegeli, Girish M Shah
Xeroderma pigmentosum C (XPC) protein initiates the global genomic subpathway of nucleotide excision repair (GG-NER) for removal of UV-induced direct photolesions from genomic DNA. The XPC has an inherent capacity to identify and stabilize at the DNA lesion sites, and this function is facilitated in the genomic context by UV-damaged DNA-binding protein 2 (DDB2), which is part of a multiprotein UV-DDB ubiquitin ligase complex. The nuclear enzyme poly(ADP-ribose) polymerase 1 (PARP1) has been shown to facilitate the lesion recognition step of GG-NER via its interaction with DDB2 at the lesion site...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28759753/inhibition-of-rad51-sensitizes-breast-cancer-cells-with-wild-type-pten-to-olaparib
#12
Qian Zhao, Jiawei Guan, Zhiwei Zhang, Jian Lv, Yulu Wang, Likun Liu, Qi Zhou, Weifeng Mao
PTEN is a tumor suppressor gene well characterized as a phosphatase. However, more evidences demonstrate PTEN functions in DNA repair independent of its phosphatase activity, which affects the efficacy of DNA damage anti-tumoral drugs in treating cancer cells with PTEN variations. Using BT549 breast cancer cells, we studied the roles of PTEN in DNA repair and in sensitization of breast cancer cells to olaparib, a poly(ADP-ribose) polymerase (PARP) inhibitor. Comet assay showed PTEN promoted DNA repair. PTEN-deficient BT549 cells are sensitive to olaparib, which shows the synthetic lethality between PTEN and PARP1...
October 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28756530/intricatinol-synergistically-enhances-the-anticancerous-activity-of-cisplatin-in-human-a549-cells-via-p38-mapk-p53-signalling
#13
Vipendra Kumar Singh, Deepika Arora, Neeraj Kumar Satija, Puneet Khare, Somendu Kumar Roy, Pradeep Kumar Sharma
Platinum containing drugs are widely used to treat advanced lung carcinomas. However, their clinical success is still limited due to severe side effects, and drug resistance. Alternative approaches are warranted to augment efficacy of platinum based chemotherapeutic drugs with minimal side effects. Intricatinol (INT), a homoisoflavonoid, has been shown to possess anti-tubercular, antioxidant, hypoglycaemic, and hypolipidemic activity. However, its anticancer activity largely remains unknown. In the present study, we have evaluated anticancer potential of INT alone or in combination with cisplatin (CIS) in non-small cell lung carcinoma (A549) cells...
July 29, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28756516/synthetic-lethality-in-malignant-pleural-mesothelioma-with-parp1-inhibition
#14
Gayathri Srinivasan, Gurjit Singh Sidhu, Elizabeth A Williamson, Aruna S Jaiswal, Nasreen Najmunnisa, Keith Wilcoxen, Dennie Jones, Thomas J George, Robert Hromas
Malignant pleural mesotheliomas (MPM) are most often surgically unresectable, and they respond poorly to current chemotherapy and radiation therapy. Between 23 and 64% of malignant pleural mesothelioma have somatic inactivating mutations in the BAP1 gene. BAP1 is a homologous recombination (HR) DNA repair component found in the BRCA1/BARD1 complex. Similar to BRCA1/2 deficient cancers, mutation in the BAP1 gene leads to a deficient HR pathway and increases the reliance on other DNA repair pathways. We hypothesized that BAP1-mutant MPM would require PARP1 for survival, similar to the BRCA1/2 mutant breast and ovarian cancers...
July 29, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28754563/changes-in-gene-expression-variability-reveal-a-stable-synthetic-lethal-interaction-network-in-brca2-ovarian-cancers
#15
Raymund Bueno, Jessica C Mar
Synthetic lethal interactions (SLIs) are robust mechanisms that provide cells with the ability to remain viable despite having mutations in genes critical to the DNA damage response, a core cellular process. Studies in model organisms such as S. cerevisiae showed that thousands of genes important in maintaining DNA integrity cooperated in a SLI network. Two genes participate in a SLI when a mutation in one gene has no effect on the cell, but mutations in both interacting genes are lethal. Furthermore in C. elegans, a mutation in a critical gene that is important for development induced a change in expression variability in the synthetic lethal interactor...
July 25, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28749454/the-association-of-low-penetrance-variants-in-dna-repair-genes-with-colorectal-cancer-a-systematic-review-and-meta-analysis
#16
Nikhil Aggarwal, Neil D Donald, Salim Malik, Subothini S Selvendran, Mark Jw McPhail, Kevin J Monahan
OBJECTIVES: Approximately 35% of colorectal cancer (CRC) risk is attributable to heritable factors known hereditary syndromes, accounting for 6%. The remainder may be due to lower penetrance polymorphisms particularly of DNA repair genes. DNA repair pathways, including base excision repair (BER), nucleotide excision repair (NER), mismatch repair (MMR), direct reversal repair (DRR), and double-strand break repair are complex, evolutionarily conserved, and critical in carcinogenesis. Germline mutations in these genes are associated with high-penetrance CRC syndromes such as Lynch syndrome...
July 27, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28747973/effect-of-ionizing-radiation-at-low-dose-on-transgenerational-carcinogenesis-by-epigenetic-regulation
#17
Lan Li, Jong-Hyun Kim, Hee-Tae Park, Jae-Hoon Lee, Min-Koo Park, Ji-Won Lee, Jeong-Chan Lee, Min-Jae Lee
The objective of this study was to determine the effect of ionizing radiation (IR) exposure of parents on carcinogenesis of the next generation focusing on the epigenetic perspective to clarify the relationship between radiation dose and carcinogenesis in F1 generation SD rats. F1 generations from pregnant rats (F0) who were exposed to gamma rays were divided into three groups according to the dose of radiation: 10 rad, 30 rad, and untreated. They were intraperitoneally injected with 50 mg/kg of diethylnitrosamine (DEN)...
June 2017: Laboratory Animal Research
https://www.readbyqxmd.com/read/28740101/p38-mapk-signaling-and-phosphorylations-in-the-brct1-domain-regulate-xrcc1-recruitment-to-sites-of-dna-damage
#18
Mirta Mittelstedt Leal de Sousa, Karine Øian Bjørås, Audun Hanssen-Bauer, Karin Solvang-Garten, Marit Otterlei
XRCC1 is a scaffold protein involved in base excision repair and single strand break repair. It is a phosphoprotein that contains more than 45 phosphorylation sites, however only a few of these have been characterized and connected to specific kinases and functions. Mitogen activated protein kinases (MAPK) are mediators of cellular stress responses, and here we demonstrate that p38 MAPK signaling is involved in phosphorylation of XRCC1 and regulation of recruitment to oxidative stress. Inhibition of p38 MAPK caused a marked pI shift of XRCC1 towards a less phosphorylated state...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28739183/can-crosstalk-between-dor-and-parp-reduce-oxidative-stress-mediated-neurodegeneration
#19
REVIEW
Rutika Raina, Dwaipayan Sen
The progressive loss of structure and function of neurons leads to neurodegenerative processes which become the causative reason for various neurodegenerative diseases such as Parkinson's disease (PD), Alzheimer's disease (AD) etc. These diseases are multifactorial in nature but they have been seen to possess similar causative agents to a certain extent. Oxidative Stress (OS) has been identified as a major stressor and a mediator in most of these diseases. OS not only leads to the generation of free radical species but if persistent, can possibly lead to lipid peroxidation, protein damage, DNA damage, and cell death...
July 21, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28718810/dna2-an-important-player-in-dna-damage-response-or-just-another-dna-maintenance-protein
#20
REVIEW
Elzbieta Pawłowska, Joanna Szczepanska, Janusz Blasiak
The human DNA2 (DNA replication helicase/nuclease 2) protein is expressed in both the nucleus and mitochondria, where it displays ATPase-dependent nuclease and helicase activities. DNA2 plays an important role in the removing of long flaps in DNA replication and long-patch base excision repair (LP-BER), interacting with the replication protein A (RPA) and the flap endonuclease 1 (FEN1). DNA2 can promote the restart of arrested replication fork along with Werner syndrome ATP-dependent helicase (WRN) and Bloom syndrome protein (BLM)...
July 18, 2017: International Journal of Molecular Sciences
keyword
keyword
44710
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"