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https://www.readbyqxmd.com/read/28431148/truncated-orf1-proteins-can-suppress-line-1-retrotransposition-in-trans
#1
Mark Sokolowski, May Chynces, Dawn deHaro, Claiborne M Christian, Victoria P Belancio
Long interspersed element 1 (L1) is an autonomous non-LTR retroelement that is active in mammalian genomes. Although retrotranspositionally incompetent and functional L1 loci are present in the same genomes, it remains unknown whether non-functional L1s have any trans effect on mobilization of active elements. Using bioinformatic analysis, we identified over a thousand of human L1 loci containing at least one stop codon in their ORF1 sequence. RNAseq analysis confirmed that many of these loci are expressed...
April 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28408706/embryo-culture-in-presence-of-oviductal-fluid-induces-dna-methylation-changes-in-bovine-blastocysts
#2
Antonio Daniel Barrera, Elina Vanesa García, Meriem Hamdi, Maria-Jesús Sánchez Calabuig, Angela Patricia Lopez-Cardona, Noelia Fonseca Balvís, Dimitrios Rizos, Alfonso Gutierrez-Adan
During the transit through the oviduct, the early embryo initiates an extensive DNA methylation reprogramming of its genome. Given that these epigenetic modifications are susceptible to environmental factors, components present in the oviductal milieu could affect the DNA methylation marks of the developing embryo. The aim of this study was to examine if culture of bovine embryos with oviductal fluid (OF) can induce DNA methylation changes at specific genomic regions in the resulting blastocysts. In vitro produced zygotes were cultured in medium with 3 mg/mL bovine serum albumin (BSA) or 1...
April 13, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28403857/hypermethylation-of-cdkn2a-exon-2-in-tumor-tumor-adjacent-and-tumor-distant-tissues-from-breast-cancer-patients
#3
Melanie Spitzwieser, Elisabeth Entfellner, Bettina Werner, Walter Pulverer, Georg Pfeiler, Stefan Hacker, Margit Cichna-Markl
BACKGROUND: Breast carcinogenesis is a multistep process involving genetic and epigenetic changes. Tumor tissues are frequently characterized by gene-specific hypermethylation and global DNA hypomethylation. Aberrant DNA methylation levels have, however, not only been found in tumors, but also in tumor-surrounding tissue appearing histologically normal. This phenomenon is called field cancerization. Knowledge of the existence of a cancer field and its spread are of clinical relevance...
April 12, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28390408/a-comprehensive-hybridization-model-allows-whole-herv-transcriptome-profiling-using-high-density-microarray
#4
Jérémie Becker, Philippe Pérot, Valérie Cheynet, Guy Oriol, Nathalie Mugnier, Marine Mommert, Olivier Tabone, Julien Textoris, Jean-Baptiste Veyrieras, François Mallet
BACKGROUND: Human endogenous retroviruses (HERVs) have received much attention for their implications in the etiology of many human diseases and their profound effect on evolution. Notably, recent studies have highlighted associations between HERVs expression and cancers (Yu et al., Int J Mol Med 32, 2013), autoimmunity (Balada et al., Int Rev Immunol 29:351-370, 2010) and neurological (Christensen, J Neuroimmune Pharmacol 5:326-335, 2010) conditions. Their repetitive nature makes their study particularly challenging, where expression studies have largely focused on individual loci (De Parseval et al...
April 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28389878/the-effects-of-different-hinge-positions-on-posterior-tibial-slope-in-medial-open-wedge-high-tibial-osteotomy
#5
Ho-Seung Jo, Jin-Sung Park, June-Ho Byun, Young-Bok Lee, Young-Lac Choi, Seong-Hee Cho, Dong-Kyu Moon, Sang-Hyuk Lee, Sun-Chul Hwang
PURPOSE: The purpose of this study was to determine the standard hinge position to minimize effects from medial open-wedge high tibial osteotomy (HTO) on the posterior tibial slope. METHODS: Sixteen cadaveric knees underwent medial open-wedge osteotomy using either the standard or the low hinge position. To define the standard hinge position, a line 3 cm inferior to the medial tibial plateau towards the fibular head and located its intersection with a longitudinal line 1 cm medial to the fibular shaft was drawn...
April 7, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28377395/integrated-approach-of-nutritional-and-molecular-epidemiology-mineralogical-and-chemical-pollutant-characterisation-the-protocol-of-a-cross-sectional-study-in-women
#6
Martina Barchitta, Annalisa Quattrocchi, Andrea Maugeri, Germana Barone, Paolo Mazzoleni, Alfio Catalfo, Guido De Guidi, Maria Iemmolo, Nunzio Crimi, Antonella Agodi
INTRODUCTION: Environmentally-related health and disease are the result of the exposome, the totality of a person's environmental exposures, from all sources and routes, across their lifespan. Epigenetic phenomena, including DNA methylation, can be potentially modified by environmental and lifestyle factors, and result in environmental reprogramming of the genome for exposed individuals and for future generations of offspring. OBJECTIVE: The objective of the project is to evaluate the risk of DNA hypomethylation due to air pollution, Mediterranean diet adherence, folate intake, and demographic and socioeconomic factors, in healthy women living in the metropolitan area of Catania, Italy...
April 4, 2017: BMJ Open
https://www.readbyqxmd.com/read/28360946/associations-of-lep-crh-icam-1-and-line-1-methylation-measured-in-saliva-with-waist-circumference-body-mass-index-and-percent-body-fat-in-mid-childhood
#7
Jocelyn Dunstan, Joseph P Bressler, Timothy H Moran, Jonathan S Pollak, Annemarie G Hirsch, Lisa Bailey-Davis, Thomas A Glass, Brian S Schwartz
BACKGROUND: Genetics explains a small proportion of variance in body mass index at the population level. Epigenetics, commonly measured by gene methylation, holds promise for understanding obesity risk factors and mechanisms. METHODS: Participants were 431 adolescents aged 10-15 years. BMI z-score, waist circumference z-score, and percent body fat were measured. Saliva samples were collected and methylation of promoter regions of four candidate genes or sequences (LEP, ICAM-1, CRH, and LINE-1) were measured in 3-4 CpG sites each...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28359265/tonggyu-tang-a-traditional-korean-medicine-suppresses-pro-inflammatory-cytokine-production-through-inhibition-of-mapk-and-nf-%C3%AE%C2%BAb-activation-in-human-mast-cells-and-keratinocytes
#8
Hyo In Kim, Se Hyang Hong, Jin Mo Ku, Sooyeon Kang, Tai Young Kim, Yong Cheol Shin, Seong-Gyu Ko
BACKGROUND: Allergic diseases including allergic rhinitis, asthma, and atopic dermatitis are increasing worldwide. Common medications used to treat these inflammatory disorders are anti-histamines and corticosteroids, but they have their own limitations such as short duration and severe side effects. Thus, interest in complementary and alternative medicine is continually growing. Here, we investigate the anti-inflammatory mechanisms of Tonggyu-tang (TGT), a traditional Korean medicine that has been used to treat patients with allergic nasal disorders...
March 31, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28343299/the-role-of-line-1-methylation-in-predicting-survival-among-colorectal-cancer-patients-a-meta-analysis
#9
Ding Ye, Danjie Jiang, Yingjun Li, Mingjuan Jin, Kun Chen
BACKGROUND: The prognostic value of long interspersed nucleotide element-1 (LINE-1) methylation in patients with colorectal cancer (CRC) remains uncertain. We have therefore performed a meta-analysis to elucidate this issue. METHODS: The PubMed and Web of Science databases were searched for studies published up to 30 June 2016 which reported on an association between LINE-1 methylation and overall survival (OS), disease-free survival (DFS), or cancer-specific survival (CSS) among CRC patients...
March 25, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28338137/an-investigation-of-the-pm2-5-and-no2-concentrations-and-their-human-health-impacts-in-the-metro-subway-system-of-suzhou-china
#10
Shi-Jie Cao, Xiang-Ri Kong, Linyan Li, Weirong Zhang, Zi-Ping Ye, Yelin Deng
This study measured the particle concentrations with an aerodynamic diameter smaller than 2.5 μm (PM2.5), nitrogen dioxide (NO2), and relative humidity (RH) at five metro subway stations in Suzhou's subway system (Lines 1 and 2). The real-time monitoring campaign was conducted from March 30(th) to April 10(th) and August 4(th) to August 21(st), 2015. The monitoring practice was carried out during rush (7:00-9:00 AM and 17:00-19:00 PM) and regular hours (other times) at the ground and underground levels under different weather conditions with a purpose of obtaining representative data...
March 24, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28330462/prospective-phase-ii-trial-of-everolimus-in-pik3ca-amplification-mutation-and-or-pten-loss-patients-with-advanced-solid-tumors-refractory-to-standard-therapy
#11
Seung Tae Kim, Jeeyun Lee, Se Hoon Park, Joon Oh Park, Young Suk Park, Won Ki Kang, Ho Yeong Lim
BACKGROUND: We designed a single-arm, open-label phase II trial of everolimus in PIK3CA amplification/mutation and/or PTEN loss patients with advanced solid tumors refractory to standard therapy (#NCT02449538). METHODS: Everolimus was administered orally at a daily dose of 10 mg continuously (28-day cycles). Treatment was continued until progression of the disease or intolerable toxicity was observed. Based on Simon's two-stage optimal design, 10 patients were treated with everolimus during the first stage...
March 23, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28328141/a-590-kb-deletion-caused-by-non-allelic-homologous-recombination-between-two-line-1-elements-in-a-patient-with-mesomelia-synostosis-syndrome
#12
Tomohiro Kohmoto, Takuya Naruto, Miki Watanabe, Yuji Fujita, Sae Ujiro, Nana Okamoto, Hideaki Horikawa, Kiyoshi Masuda, Issei Imoto
Mesomelia-synostoses syndrome (MSS) is a rare, autosomal-dominant, syndromal osteochondrodysplasia characterized by mesomelic limb shortening, acral synostoses, and multiple congenital malformations due to a non-recurrent deletion at 8q13 that always encompasses two coding-genes, SULF1 and SLCO5A1. To date, five unrelated patients have been reported worldwide, and MMS was previously proposed to not be a genomic disorder associated with deletions recurring from non-allelic homologous recombination (NAHR) in at least two analyzed cases...
April 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28315054/a-preliminary-investigation-of-noise-impact-within-metro-stations-in-the-urban-city-of-guangzhou-china
#13
Peng Wang, Yimin Wang, Chao Zou, Jixing Guo
The noise in the metro station is synthesized from a variety of different noise sources. Excessive noise exposure will bring serious impacts on humans' health. To alleviate the shortage of the urban land, most metro stations are planning to develop convenience stores and shopping malls. In order to evaluate the potential noise impact on humans' comfort in the metro stations, this study selected four representative stations of Guangzhou Metro Line 1 to carry out a preliminary questionnaire survey of 226 respondents for the perception and perform a noise measurement...
March 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28300471/decoupling-of-dna-methylation-and-activity-of-intergenic-line-1-promoters-in-colorectal-cancer
#14
Natasha Vafadar-Isfahani, Christina Parr, Lara E McMillan, Juliane Sanner, Zhao Yeo, Stephen Saddington, Oliver Peacock, Hazel A Cruickshanks, Richard R Meehan, Jonathan N Lund, Cristina Tufarelli
Hypomethylation of LINE-1 repeats in cancer has been proposed as the main mechanism behind their activation; this assumption, however, was based on findings from early studies that were biased towards young and transpositionally active elements. Here, we investigate the relationship between methylation of two intergenic, transpositionally inactive LINE-1 elements and expression of the LINE-1 chimeric transcript (LCT) 13 and LCT14 driven by their antisense promoters (L1-ASP). Our data from DNA modification, expression, and 5'RACE analyses suggest that colorectal cancer methylation in the regions analyzed is not always associated with LCT repression...
March 16, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28293326/line-1-is-preferentially-hypomethylated-within-adenomatous-polyps-in-the-presence-of-synchronous-colorectal-cancer
#15
Alice Chu Jiang, Lela Buckingham, William Barbanera, Amoah Yeboah Korang, Faraz Bishesari, Joshua Melson
BACKGROUND: Conventional tubular adenomas are frequently detected in patients undergoing average risk screening colonoscopy and are over-represented in patients who will develop colorectal cancer (CRC). Whether features of adenomas could serve as predictors of synchronous CRC is not known. Here, we investigate whether global methylation markers, including LINE-1, differ within adenomas in patients with and without synchronous CRC. METHODS: Colorectal tubular/tubulovillous adenomatous polyps in the absence (P group, n = 45) and in the presence of synchronous CRC (PC group, n = 32) were identified...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28270149/chronic-exposure-to-arsenic-line-1-hypomethylation-and-blood-pressure-a-cross-sectional-study-in-bangladesh
#16
Khaled Hossain, Takehiro Suzuki, M M Hasibuzzaman, Md Shofikul Islam, Atiqur Rahman, Sudip Kumar Paul, Tanzina Tanu, Shakhawoat Hossain, Zahangir Alam Saud, Mashiur Rahman, Farjana Nikkon, Hideki Miyataka, Seiichiro Himeno, Keiko Nohara
BACKGROUND: Chronic exposure to arsenic is associated with cancer and hypertension. Growing evidence suggests that altered methylation in long interspersed nuclear element-1 (LINE-1) is involved in many types of disorders, including cardiovascular disease. Here we evaluated the association between arsenic exposure and LINE-1 methylation levels, especially in relation to blood pressure (BP). METHODS: A total of 236 subjects (175 from arsenic-endemic areas and 61 from a non-endemic area) in rural Bangladesh were recruited...
March 7, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28261276/dietary-intake-is-associated-with-respiratory-health-outcomes-and-dna-methylation-in-children-with-asthma
#17
L Montrose, T J Ward, E O Semmens, Y H Cho, B Brown, C W Noonan
BACKGROUND: Asthma is an increasingly common chronic disease among children, and data point toward a complex mechanism involving genetic, environmental and epigenetic factors. Epigenetic modifications such as DNA hypo- or hyper-methylation have been shown to occur in response to environmental exposures including dietary nutrients. METHODS: Within the context of the asthma randomized trial of indoor wood smoke (ARTIS) study, we investigated relationships between diet, asthma health measures, and DNA methylation...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28258386/assessing-the-combined-effect-of-extremely-low-frequency-magnetic-field-exposure-and-oxidative-stress-on-line-1-promoter-methylation-in-human-neural-cells
#18
Gianfranco Giorgi, Chiara Pirazzini, Maria Giulia Bacalini, Cristina Giuliani, Paolo Garagnani, Miriam Capri, Ferdinando Bersani, Brunella Del Re
Extremely low frequency magnetic fields (ELF-MF) have been classified as "possibly carcinogenic", but their genotoxic effects are still unclear. Recent findings indicate that epigenetic mechanisms contribute to the genome dysfunction and it is well known that they are affected by environmental factors. To our knowledge, to date the question of whether exposure to ELF-MF can influence epigenetic modifications has been poorly addressed. In this paper, we investigated whether exposure to ELF-MF alone and in combination with oxidative stress (OS) can affect DNA methylation, which is one of the most often studied epigenetic modification...
May 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28256616/dose-and-time-effect-responses-of-dna-methylation-and-histone-h3k9-acetylation-changes-induced-by-traffic-related-air-pollution
#19
Rui Ding, Yongtang Jin, Xinneng Liu, Huaizhuang Ye, Ziyi Zhu, Yuan Zhang, Ting Wang, Yinchun Xu
As an important risk factor of respiratory disorders, traffic-related air pollution (TRAP) has caused extensive concerns. Epigenetic change has been considered a link between TRAP and respiratory diseases. However, the exact effects of TRAP on epigenetic changes are still unclear. Here we investigated the dose- and time- effect responses of TRAP on DNA methylations and H3K9 acetylation (H3K9ac) in both blood and lung tissues of rats. The findings showed that every 1 μg/m(3) increase of TRAP components were associated with changes in %5 mC (95% CI) in LINE-1, iNOS, p16(CDKN2A), and APC ranging from -0...
March 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28252169/selecting-black-spot-resistant-papaya-genotypes-derived-from-backcrossing-and-hybrids
#20
T P S Poltronieri, S F Silveira, M Vivas, R Santa Catarina, D F M Cortes, A O N Azevedo, M G Pereira
Papaya crop is important to Brazilian agribusiness. However, the expansion of papaya cultivation in the country is affected by the absence of commercial cultivars presenting good disease resistance. The black-spot caused by the fungus Asperisporium caricae is the most damaging foliar disease affecting Brazilian papaya crops. The use of genetically resistant cultivars is a promising strategy to reduce the dependence of papaya crops on fungicides. A field split-plot experiment was carried out in the municipality of Linhares, Espírito Santo State, and included 20 hybrids derived from the cross between 14 superior lines and four elite genotypes ('SS72/12', 'SEKATI', 'JS/12' and '41/7'), two commercial cultivars ('Golden' and 'Tainung 01'), and the superior line '36/7', which were evaluated for resistance to black-spot in the fruits and leaves...
February 23, 2017: Genetics and Molecular Research: GMR
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