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https://www.readbyqxmd.com/read/28651181/antifouling-biocides-impairment-of-bivalve-immune-system-by-chlorothalonil
#1
Amanda da Silveira Guerreiro, Regina Coimbra Rola, Monique Tomazele Rovani, Simone Rutz da Costa, Juliana Zomer Sandrini
Marine ecosystems are subjected to a variety of contaminants. Antifouling paints, for example, have been extensively used to protect ship surfaces from marine biofouling, but their toxicity has generated great concern. Thus, we evaluated the effect of the biocide chlorothalonil on the immune system of Perna perna mussels. The mussels were exposed to 0 (control), 0.1μg/L and 10μg/L of chlorothalonil for up to 96h. After 24h and 96h of exposure, the following immune-related parameters were analyzed in the hemolymph of mussels: total hemocyte count, cell adhesion, phagocytic activity, level of reactive oxygen species, cell viability and comet assay...
June 16, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28651168/the-antioxidant-and-anti-inflammatory-properties-of-lycopene-in-mice-lungs-exposed-to-cigarette-smoke
#2
Keila Karine Duarte Campos, Glaucy Rodrigues Araújo, Thais Lourenço Martins, Ana Carla Balthar Bandeira, Guilherme de Paula Costa, André Talvani, Camila Carrião Machado Garcia, Laser Antônio Machado Oliveira, Daniela Caldeira Costa, Frank Silva Bezerra
Lycopene is a carotenoid with known antioxidant and anti-inflammatory properties. We aimed to evaluate the in vitro and in vivo effects of lycopene on reducing the redox imbalance and inflammation induced by cigarette smoke (CS). For the in vitro study, J774A.1 (macrophages) cells were incubated in the presence of 0.5, 1.0, 2.0, 4.0, 8.0, 10.0 and 25 μM of lycopene for 3, 6 and 24 h or in the presence of 0.1%, 0.25%, 0.5%, 0.625%, 1.25%, 2.25%, 5% and 10% cigarette smoke extract (CSE) for 3, 6 and 24 h to assess cell viability and measurement of intracellular reactive oxygen species (ROS)...
June 20, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28651167/error-prone-bypass-of-o-6-methylguanine-by-dna-polymerase-of-pseudomonas-aeruginosa-phage-pap1
#3
Shiling Gu, Jingyuan Xiong, Ying Shi, Jia You, Zhenyu Zou, Xiaoying Liu, Huidong Zhang
O(6)-Methylguanine (O(6)-MeG) is highly mutagenic and is commonly found in DNA exposed to methylating agents, generally leads to G:C to A:T mutagenesis. To study DNA replication encountering O(6)-MeG by the DNA polymerase (gp90) of P. aeruginosa phage PaP1, we analyzed steady-state and pre-steady-state kinetics of nucleotide incorporation opposite O(6)-MeG by gp90 exo(-). O(6)-MeG partially inhibited full-length extension by gp90 exo(-). O(6)-MeG greatly reduces dNTP incorporation efficiency, resulting in 67-fold preferential error-prone incorporation of dTTP than dCTP...
June 10, 2017: DNA Repair
https://www.readbyqxmd.com/read/28651013/loss-of-prion-protein-induces-a-primed-state-of-type-i-interferon-responsive-genes
#4
Giulia Malachin, Malin R Reiten, Øyvind Salvesen, Håvard Aanes, Jorke H Kamstra, Kerstin Skovgaard, Peter M H Heegaard, Cecilie Ersdal, Arild Espenes, Michael A Tranulis, Maren K Bakkebø
The cellular prion protein (PrPC) has been extensively studied because of its pivotal role in prion diseases; however, its functions remain incompletely understood. A unique line of goats has been identified that carries a nonsense mutation that abolishes synthesis of PrPC. In these animals, the PrP-encoding mRNA is rapidly degraded. Goats without PrPC are valuable in re-addressing loss-of-function phenotypes observed in Prnp knockout mice. As PrPC has been ascribed various roles in immune cells, we analyzed transcriptomic responses to loss of PrPC in peripheral blood mononuclear cells (PBMCs) from normal goat kids (n = 8, PRNP+/+) and goat kids without PrPC (n = 8, PRNPTer/Ter) by mRNA sequencing...
2017: PloS One
https://www.readbyqxmd.com/read/28651000/assessing-the-impact-of-benzo-a-pyrene-on-marine-mussels-application-of-a-novel-targeted-low-density-microarray-complementing-classical-biomarker-responses
#5
Mohamed Banni, Susanna Sforzini, Volker M Arlt, Audrey Barranger, Lorna J Dallas, Caterina Oliveri, Yann Aminot, Beniamina Pacchioni, Caterina Millino, Gerolamo Lanfranchi, James W Readman, Michael N Moore, Aldo Viarengo, Awadhesh N Jha
Despite the increasing use of mussels in environmental monitoring and ecotoxicological studies, their genomes and gene functions have not been thoroughly explored. Several cDNA microarrays were recently proposed for Mytilus spp., but putatively identified partial transcripts have rendered the generation of robust transcriptional responses difficult in terms of pathway identification. We developed a new low density oligonucleotide microarray with 465 probes covering the same number of genes. Target genes were selected to cover most of the well-known biological processes in the stress response documented over the last decade in bivalve species at the cellular and tissue levels...
2017: PloS One
https://www.readbyqxmd.com/read/28650656/cytotoxic-and-mutagenic-properties-of-c3-epimeric-lesions-of-2-deoxyribonucleosides-in-escherichia-coli-cells
#6
Pengcheng Wang, Nicholas J Amato, Yinsheng Wang
Reactive oxygen species (ROS), resulting from endogenous metabolism and/or environmental exposure, can induce damage to the 2-deoxyribose moiety in DNA. Specifically, a hydrogen atom from each of the five carbon atoms in 2-deoxyribose can be abstracted by hydroxyl radical, and improper chemical repair of the ensuing radicals formed at the C1', C3', and C4' positions can lead to the stereochemical inversion at these carbons to yield epimeric 2-deoxyribose lesions. Although single-nucleobase lesions induced by ROS have been well characterized, few studies have been conducted to examine the biological consequences of the C3'-epimeric lesions of 2'-deoxynucleosides, i...
June 26, 2017: Biochemistry
https://www.readbyqxmd.com/read/28650627/cancer-risk-assessment-of-airborne-pahs-based-on-in-vitro-mixture-potency-factors
#7
Kristian Dreij, Ase Mattsson, Ian Jarvis, Hwanmi Lim, Jennie Hurkmans, Johan Gustafsson, Christoffer Bergvall, Roger Westerholm, Christer Johansson, Ulla Stenius
Complex mixtures of polycyclic aromatic hydrocarbons (PAHs) are common environmental pollutants associated with adverse human health effects including cancer. However, the risk of exposure to mixtures is difficult to estimate and risk assessment by whole mixture potency evaluations has been suggested. To facilitate this, reliable in vitro based testing systems are necessary. Here, we investigated if activation of DNA damage signaling in vitro could be an endpoint for developing whole mixture potency factors (MPFs) for airborne PAHs...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28650588/genetic-study-of-the-braf-gene-reveals-a-new-variants-and-high-frequency-of-the-v600e-mutation-among-iranian-ameloblastoma-patients
#8
Maryam Soltani, Mohammad Amin Tabatabaiefar, Zhaleh Mohsenifar, Mohammad Reza Pourreza, Abbas Moridnia, Laleh Shariati, Seyyed Mohammad Razavi
BACKGROUND: Ameloblastoma is a benign, slow-growing, locally invasive tumor. It is one of the most prevalent odontogenic tumors, with an incidence rate of 1% of all oral tumors and approximately 18% of odontogenic tumors. A group of genes has been investigated in patients with ameloblastoma. The BRAF V600E mutation has been implicated as the most common mutation in ameloblastoma. The presence or absence of this mutation has been associated with several clinopathological properties, including location, age at diagnosis, histology, and prognosis...
June 26, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28650332/nepeta-rtanjensis-lamiaceae-a-plant-endemic-to-the-balkans-phenolic-composition-antioxidant-activity-and-in-vitro-antigenotoxic-effects-in-triiodothyronine-induced-dna-damage-in-human-lymphocytes
#9
Jasna Bošnjak-Neumüller, Milena Radaković, Ninoslav Djelić, Branka Vuković-Gačić, Zora Dajić Stevanović, Stoimir Kolarević, Danijela Mišić, Milan Stanković, Jelena Knežević-Vukčević, Biljana Spremo-Potparević, Zoran Stanimirović
The success of antioxidant therapy in hyperthyroidism implies that disease is mediated by oxidative stress, which is known as one of the causing agents of ageing, degenerative diseases, and cancer. The main objective of our study was to determine possible protective effects of methanolic extract of N. rtanjensis in triiodothyronine (T3)-induced DNA breaks of human lymphocytes under in vitro conditions, based upon plant antioxidant capacity related to its phytochemical profile, mainly its polyphenolic complex...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28650317/serine-adp-ribosylation-reversal-by-the-hydrolase-arh3
#10
Ivan Ahel, Pietro Fontana, Juan José Bonfiglio, Luca Palazzo, Edward Bartlett, Ivan Matic
ADP-ribosylation (ADPr) is a posttranslational modification (PTM) of proteins that controls many cellular processes, including DNA repair, transcription, chromatin regulation and mitosis. A number of proteins catalyse the transfer and hydrolysis of ADPr, and also specify how and when the modification is conjugated to the targets. We recently discovered a new form of ADPr that is attached to serine residues in target proteins (Ser-ADPr) and showed that this PTM is specifically made by PARP1/HPF1 and PARP2/HPF1 complexes...
June 26, 2017: ELife
https://www.readbyqxmd.com/read/28650265/autophagy-regulates-dna-repair-through-sqstm1-p62
#11
Yuchen Feng, Daniel J Klionsky
Macroautophagy/autophagy is primarily a degradative pathway that clears malfunctioning cellular components in response to various types of stress. Recent studies have indicated that autophagy also plays an important role in maintaining genome stability. Loss of autophagy is associated with increased damage to DNA, inappropriate amplification of genomic regions and abnormal chromosome number. In a recent paper by Wang et al. the authors uncover a mechanism through which autophagy regulates the ubiquitination of chromatin...
June 3, 2017: Autophagy
https://www.readbyqxmd.com/read/28649883/middle-down-proteomics-a-still-unexploited-resource-for-chromatin-biology
#12
Simone Sidoli, Benjamin A Garcia
Introduction Analysis of histone post-translational modifications (PTMs) by mass spectrometry (MS) has become a fundamental tool for the characterization of chromatin composition and dynamics. Histone PTMs benchmark several biological states of chromatin, including regions of active enhancers, active/repressed gene promoters and damaged DNA. These complex regulatory mechanisms are often defined by combinatorial histone PTMs; for instance, active enhancers are commonly occupied by both marks H3K4me1 and H3K27ac...
June 26, 2017: Expert Review of Proteomics
https://www.readbyqxmd.com/read/28649742/genotranscriptomic-meta-analysis-of-the-chd-family-chromatin-remodelers-in-human-cancers-initial-evidence-of-an-oncogenic-role-for-chd7
#13
Xiaofang Chu, Xuhui Guo, Yuanyuan Jiang, Huimei Yu, Lanxin Liu, Wenqi Shan, Zeng-Quan Yang
Chromodomain helicase DNA binding proteins (CHD) are characterized by N-terminal tandem chromodomains and a central ATP-dependent helicase domain. CHDs govern the cellular machinery's access to DNA, thereby playing critical roles in various cellular processes including transcription, proliferation, and DNA damage repair. Accumulating evidence demonstrates that mutation and dysregulation of CHDs are implicated in the pathogenesis of developmental disorders and cancer. However, we know little about genomic and transcriptomic alterations and the clinical significance of most CHDs in human cancer...
June 26, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28649636/interplay-of-space-radiation-and-microgravity-in-dna-damage-and-dna-damage-response
#14
María Moreno-Villanueva, Michael Wong, Tao Lu, Ye Zhang, Honglu Wu
In space, multiple unique environmental factors, particularly microgravity and space radiation, pose constant threat to the DNA integrity of living organisms. Specifically, space radiation can cause damage to DNA directly, through the interaction of charged particles with the DNA molecules themselves, or indirectly through the production of free radicals. Although organisms have evolved strategies on Earth to confront such damage, space environmental conditions, especially microgravity, can impact DNA repair resulting in accumulation of severe DNA lesions...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28649426/conserved-and-species-specific-molecular-denominators-in-mammalian-skeletal-muscle-aging
#15
Evi M Mercken, Miriam Capri, Bethany A Carboneau, Maria Conte, Juliana Heidler, Aurelia Santoro, Alejandro Martin-Montalvo, Marta Gonzalez-Freire, Husam Khraiwesh, José A González-Reyes, Ruin Moaddel, Yongqing Zhang, Kevin G Becker, José M Villalba, Julie A Mattison, Ilka Wittig, Claudio Franceschi, Rafael de Cabo
Aging is a complex phenomenon involving functional decline in multiple physiological systems. We undertook a comparative analysis of skeletal muscle from four different species, i.e. mice, rats, rhesus monkeys, and humans, at three different representative stages during their lifespan (young, middle, and old) to identify pathways that modulate function and healthspan. Gene expression profiling and computational analysis revealed that pathway complexity increases from mice to humans, and as mammals age, there is predominantly an upregulation of pathways in all species...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/28649423/ubiquitous-overexpression-of-the-dna-repair-factor-dprp19-reduces-dna-damage-and-extends-drosophila-life-span
#16
Kathrin Garschall, Hanna Dellago, Martina Gáliková, Markus Schosserer, Thomas Flatt, Johannes Grillari
Mechanisms that ensure and maintain the stability of genetic information are fundamentally important for organismal function and can have a large impact on disease, aging, and life span. While a multi-layered cellular apparatus exists to detect and respond to DNA damage, various insults from environmental and endogenous sources continuously affect DNA integrity. Over time this can lead to the accumulation of somatic mutations, which is thought to be one of the major causes of aging. We have previously found that overexpression of the essential human DNA repair and splicing factor SNEV, also called PRP19 or hPso4, extends replicative life span of cultured human endothelial cells and impedes accumulation of DNA damage...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/28649409/bacillus-subtilis-utilizes-the-dna-damage-response-to-manage-multicellular-development
#17
Kevin Gozzi, Carly Ching, Srinand Paruthiyil, Yinjuan Zhao, Veronica Godoy-Carter, Yunrong Chai
Bacteria switch between free-living and a multicellular state, known as biofilms, in response to cellular and environmental cues. It is important to understand how these cues influence biofilm development as biofilms are not only ubiquitous in nature but are also causative agents of infectious diseases. It is often believed that any stress triggers biofilm formation as a means of bacterial protection. In this study, we propose a new mechanism for how cellular and environmental DNA damage may influence biofilm formation...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28649382/does-sperm-quality-and-dna-integrity-differ-in-cryopreserved-semen-samples-from-young-adult-and-aged-nellore-bulls
#18
J T Carreira, J T Trevizan, I R Carvalho, B Kipper, L H Rodrigues, C Silva, S H V Perri, J R Drevet, M B Koivisto
BACKGROUND: In humans, it is now well documented that rising paternal age is correlated with decreased sperm DNA integrity and embryonic developmental failures. On the other side of the coin, it is also reported that very young fathers such as teenagers carry an increased risk of adverse birth outcomes. These observations suggest that, at least in humans, there is an age window for optimal sperm DNA integrity. In bovine, little is known about sperm DNA quality in young bulls and how it evolves with age...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28649314/hierarchical-cortical-transcriptome-disorganization-in-autism
#19
Michael V Lombardo, Eric Courchesne, Nathan E Lewis, Tiziano Pramparo
BACKGROUND: Autism spectrum disorders (ASD) are etiologically heterogeneous and complex. Functional genomics work has begun to identify a diverse array of dysregulated transcriptomic programs (e.g., synaptic, immune, cell cycle, DNA damage, WNT signaling, cortical patterning and differentiation) potentially involved in ASD brain abnormalities during childhood and adulthood. However, it remains unclear whether such diverse dysregulated pathways are independent of each other or instead reflect coordinated hierarchical systems-level pathology...
2017: Molecular Autism
https://www.readbyqxmd.com/read/28649248/a-combination-of-podophyllotoxin-and-rutin-alleviates-radiation-induced-pneumonitis-and-fibrosis-through-modulation-of-lung-inflammation-in-mice
#20
Savita Verma, Bhargab Kalita, Sania Bajaj, Hridayesh Prakash, Ajay Kumar Singh, Manju Lata Gupta
Pneumonitis and pulmonary fibrosis are predominant consequences of radiation exposure, whether planned or accidental. The present study, demonstrates radioprotective potential of a formulation, prepared by combining podophyllotoxin and rutin (G-003M), in mice exposed to 11 Gy thoracic gamma radiation (TGR). Treated mice were observed for survival and other symptomatic features. Formation of reactive oxygen species (ROS)/nitric oxide (NO) was measured in bronchoalveolar lavage cells. DNA damage and cell death were assessed in alveolar cells by terminal deoxynucleotidyl transferase dUTP nick-end labeling assay...
2017: Frontiers in Immunology
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