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Pathology methylation

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https://www.readbyqxmd.com/read/29147009/mitochondrial-uqcrb-as-a-new-molecular-prognostic-biomarker-of-human-colorectal-cancer
#1
Hyun-Chul Kim, Junghwa Chang, Hannah S Lee, Ho Jeong Kwon
Ubiquinol cytochrome c reductase binding protein (UQCRB) is important for mitochondrial complex III stability, electron transport, cellular oxygen sensing and angiogenesis. However, its potential as a prognostic marker in colorectal cancer (CRC) remains unclear. The aim of this study was to determine whether UQCRB can be used as a diagnostic molecular marker for CRC. The correlation between the expression of three genes (UQCRB, UQCRFS1 and MT-CYB) in the mitochondrial respiratory chain complex III and clinico-pathological features was determined...
November 17, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29133016/dynamic-transcriptional-control-of-macrophage-mirna-signature-via-inflammation-responsive-enhancers-revealed-using-a-combination-of-next-generation-sequencing-based-approaches
#2
Zsolt Czimmerer, Attila Horvath, Bence Daniel, Gergely Nagy, Ixchelt Cuaranta-Monroy, Mate Kiss, Zsuzsanna Kolostyak, Szilard Poliska, Laszlo Steiner, Nikolas Giannakis, Tamas Varga, Laszlo Nagy
MicroRNAs are important components of the post-transcriptional fine-tuning of macrophage gene expression in physiological and pathological conditions. However, the mechanistic underpinnings and the cis-acting genomic factors of how macrophage polarizing signals induce miRNA expression changes are not well characterized. Therefore, we systematically evaluated the transcriptional basis underlying the inflammation-mediated regulation of macrophage microRNome using the combination of different next generation sequencing datasets...
November 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29130188/quantification-of-2-o-me-residues-in-rna-using-next-generation-sequencing-illumina-ribomethseq-protocol
#3
Lilia Ayadi, Yuri Motorin, Virginie Marchand
RNA 2'-O-methylation is one of the ubiquitous nucleotide modifications found in many RNA types from bacteria, archaea, and eukarya. We and others have recently published accurate and sensitive detection of these modifications on native RNA at a single base resolution by high-throughput sequencing technologies. Relative quantification of these modifications is still under progress and would probably reduce the number of false positives due to 3D RNA structure. Therefore, here, we describe a reliable and optimized protocol for quantification of 2'-O-Methylations based on alkaline fragmentation of RNA coupled to a commonly used ligation approach followed by Illumina sequencing...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29128865/promoter-methylation-of-rassf1a-indicates-prognosis-for-patients-with-stage-ii-and-iii-colorectal-cancer-treated-with-oxaliplatin-based-chemotherapy
#4
Xicai Sun, Wei Yuan, Furong Hao, Wenzhen Zhuang
BACKGROUND The purpose of this study was to investigate the prognostic significance of methylation of RAS association domain family protein 1 (RASSF1A) in the promoter region for patients with stage II and III colorectal cancer (CRC) receiving oxaliplatin-based chemotherapy. MATERIAL AND METHODS There were 108 eligible CRC patients and 78 healthy controls included in this study. Methylation-specific polymerase chain reaction (MSP) was applied to detect the methylation status of RASSF1A in patients before and after chemotherapy...
November 12, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29125941/epitranscriptomics-regulation-of-mrna-metabolism-through-modifications
#5
REVIEW
Eyal Peer, Gideon Rechavi, Dan Dominissini
Cellular RNAs can be modified post-transcriptionally with dynamic and reversible chemical modifications. These modifications can alter the structure and metabolism of mRNA, but only recent methodological and conceptual advances allowed systematic mapping and functional analysis to unfold the role they play in mRNA biology. Mapping the most common internal mRNA modification, N(6)-methyladenosine (m(6)A), paved the way for the deciphering of other types of mRNA modifications, such as N(1)-methyladenosine (m(1)A)...
November 7, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/29124997/perinatal-exposure-to-environmental-tobacco-smoke-is-associated-with-changes-in-dna-methylation-that-precede-the-adult-onset-of-lung-disease-in-a-mouse-model
#6
Elizabeth Cole, Traci A Brown, Kent E Pinkerton, Britten Postma, Keegan Malany, Mihi Yang, Yang Jee Kim, Raymond F Hamilton, Andrij Holian, Yoon Hee Cho
Prenatal and early-life environmental tobacco smoke (ETS) exposure can induce epigenetic alterations associated with inflammation and respiratory disease. The objective of this study was to address the long-term epigenetic consequences of perinatal ETS exposure on latent respiratory disease risk, which are still largely unknown. C57BL/6 mice were exposed to prenatal and early-life ETS; offspring lung pathology, global DNA, and gene-specific methylation were measured at two adult ages. Significant alterations in global DNA methylation and promoter methylation of IFN-γ and Thy-1 were found in ETS-exposed offspring at 10-12 and 20 weeks of age...
August 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29115507/cytochrome-p450-1a1-and-1b1-promoter-cpg-island-methylation-regulates-rat-liver-injury-induced-by-isoniazid
#7
Yanhui Li, Yuhong Li, Guoying Zheng, Lingyan Zhu, Jishun Wang, Shasha Mu, Qi Ren, Fumin Feng
DNA methylation is an important component of epigenetics that is involved in the occurrence and development of a variety of diseases. The present study aimed to clarify the relationship between cytochrome P450 (CYP)1A1 and CYP1B1 promoter CpG island methylation and isoniazid‑induced liver injury in rats, and to explore the possible mechanism, rats were given an intragastric dose of isoniazid (55 mg·kg‑1·d‑1). High performance liquid chromatography was used to analyze the DNA methylation level of the whole genome in liver tissue...
October 31, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29112298/mef2c-mrna-expression-and-cognitive-function-in-japanese-patients-with-alzheimer-s-disease
#8
Tomoko Sao, Yuta Yoshino, Kiyohiro Yamazaki, Yuki Ozaki, Yoko Mori, Shinichiro Ochi, Taku Yoshida, Takaaki Mori, Jun-Ichi Iga, Shu-Ichi Ueno
AIM: Despite continuing research into Alzheimer's disease (AD), its pathological mechanisms and modulating factors remain unknown. Several genes influence AD pathogenesis by affecting inflammatory pathways. Myocyte enhancer factor 2C (MEF2C) is one such candidate gene for AD. METHODS: We examined MEF2C mRNA expression levels and methylation rates of CpGs on its promoter region in peripheral leukocytes from Japanese AD patients compared with age- and sex-matched control subjects...
November 7, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/29112047/memantine-an-nmda-receptor-antagonist-prevents-thyroxin-induced-hypertension-but-not-cardiac-remodeling
#9
Steven J Repas, Nancy S Saad, Paul M L Janssen, Mohammad T Elnakish
Stimulation of glutamatergic tone has been causally linked to myocardial pathogenesis and amplified systemic blood pressure (BP). Memantine, a noncompetitive N-methyl-D-aspartate glutamatergic receptor (NMDA-R) antagonist, has been proposed to be an active cardioprotective drug. However, the efficacy of memantine and subsequently the possible involvement of the NMDA-R in the thyroxin (T4)-induced cardiovascular complications have never been investigated. We examined the effect of memantine (30 mg·kg·d) on the T4 (500 μg·kg·d)-provoked increase in mouse BP, cardiac hypertrophy indicated by enlarged overall myocardial mass, and reformed reactions of the contractile myocardium both in vivo and ex vivo after 2 weeks of treatment...
November 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29111328/3-naphthalen-2-yl-propoxy-methyl-azetidine-hydrochloride-attenuates-nlrp3-inflammasome-mediated-signaling-pathway-in-lipopolysaccharide-stimulated-bv2-microglial-cells
#10
Ji Woong Yang, Seung-Ju Yang, Jung-Min Na, Hoh-Gyu Hahn, Sung-Woo Cho
The nucleotide-binding and oligomerization domain-like receptor containing a pyrin domain 3 (NLRP3) inflammasome is a multiprotein complex with a role in innate immune responses. NLRP3 inflammasome dysfunction is a common feature of chronic inflammatory diseases. Microglia activation is also associated with neuroinflammatory pathologies. We previously reported that 3-(naphthalen-2-yl(propoxy)methyl)azetidine hydrochloride (KHG26792) reduced hypoxia-induced toxicity by modulating inflammation. However, no studies have elucidated the precise mechanisms for the anti-inflammatory action of KHG26792, in particular via inflammasome mediation...
October 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29111133/in-vivo-brain-plaque-and-tangle-burden-mediates-the-association-between-diastolic-blood-pressure-and-cognitive-functioning-in-nondemented-adults
#11
Florence F Roussotte, Prabha Siddarth, David A Merrill, Katherine L Narr, Linda M Ercoli, Jacqueline Martinez, Natacha D Emerson, Jorge R Barrio, Gary W Small
OBJECTIVE: Growing evidence supports an association between increased blood pressure and: (a) poor cognitive performance in older adults, and (b) various biomarkers of increased Alzheimer's disease (AD) neuropathology. The objective of this study was to determine whether systolic blood pressure (SBP) and diastolic blood pressure (DBP) were significantly associated with cognitive functioning in non-demented adults, and to examine in vivo AD pathology as a possible mediator of this association...
September 15, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/29109756/imaging-acetaldehyde-formation-during-ethanol-metabolism-in-living-cells-using-a-hydrazinyl-naphthalimide-fluorescent-probe
#12
A G Reeves, M Subbarao, A R Lippert
The metabolism of ethanol to acetaldehyde has been visualized in living lung epithelial cells using a hydrazinyl naphthalimide fluorescent probe. Utilizing a condensation reaction between carbonyls and a hydrazine moeity, we demonstrate that the fluorescent probe (Aldehydefluor-1) AF1 reacts with a range of reactive carbonyl species including formaldehyde, acetaldehyde, glyoxylic acid, and methyl glyoxal. With AF1, it is possible to directly visualize endogenous carbonyl metabolites. Here, we have applied it towards the visualization of acetaldehyde generated from alcohol dehydrogenase mediated ethanol metabolism, validating it as a useful tool to study the roles of alcohol in respiratory disease and other pathological mechanisms...
2017: Analytical Methods: Advancing Methods and Applications
https://www.readbyqxmd.com/read/29104026/current-insights-into-functions-of-phospholipase-a2-receptor-in-normal-and-cancer-cells-more-questions-than-answers
#13
REVIEW
Olga Sukocheva, Mario Menschikowski, Albert Hagelgans, Nagendra Sastry Yarla, Gabriele Siegert, Pallu Reddanna, Anupam Bishayee
Lipid signaling network was proposed as a potential target for cancer prevention and treatment. Several recent studies revealed that phospholipid metabolising enzyme, phospholipase A2 (PLA2), is a critical regulator of cancer accelerating pathologies and apoptosis in several types of cancers. In addition to functioning as an enzyme, PLA2 can activate a phospholipase A2 receptor (PLA2R1) in plasma membrane. While the list of PLA2 targets extends to glucose homeostasis, intracellular energy balance, adipocyte development, and hepatic lipogenesis, the PLA2R1 downstream effectors are few and scarcely investigated...
November 2, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/29103775/cyclin-d1-promoter-56-and-54bp-cpg-un-methylation-predicts-invasive-progression-in-arsenic-induced-bowen-s-disease
#14
Wei-Ting Liao, Huey-Ling You, Chee-Yin Chai, Chih-Hung Lee, Cheng-Che E Lan, Shun-Jen Chang, Chu-Ling Yu, Hsin-Su Yu
BACKGROUND: Patients with arsenic-induced Bowen's disease (As-BD) are at risk of developing invasive cancers in the skin, lung, and urinary bladder. However, a longitudinal follow-up study on the association between As-BD and invasive cancers is still lacking. OBJECTIVES: This study aims to investigate the underlying molecular mechanisms of this malignant progression in the skin and internal organs. METHODS: This is a biopsy-based follow-up study...
October 31, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29103769/comparative-assessment-of-three-methods-to-analyze-mgmt-methylation-status-in-a-series-of-350-gliomas-and-gangliogliomas
#15
Leiming Wang, Zhuo Li, Cuicui Liu, Li Chen, Li Liu, Zeliang Hu, Lihong Zhao, Dehong Lu, Lianghong Teng
MGMT promoter methylation is considered as a prognostic and predictive biomarker indicating response to chemotherapy and radiotherapy in glioblastoma. A number of different methods and platforms including pyrosequencing (PSQ), quantitative methylation-specific PCR (qMSP) and immunohistochemistry (IHC), methylation-sensitive high resolution melting (MS-HRM) and NGS (Next Generation Sequencing) have been used to detect MGMT promoter methylation in gliomas. However, controversy remains about the most appropriate method to use for analyzing MGMT status...
October 10, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29102463/novel-ureidopropanamide-based-n-formyl-peptide-receptor-2-fpr2-agonists-with-potential-application-for-central-nervous-system-disorders-characterized-by-neuroinflammation
#16
Madia Letizia Stama, Joanna Ślusarczyk, Enza Lacivita, Liliya N Kirpotina, Igor A Schepetkin, Katarzyna Chamera, Chiara Riganti, Roberto Perrone, Mark T Quinn, Agnieszka Basta-Kaim, Marcello Leopoldo
Formyl peptide receptor2 (FPR2) is a G-protein coupled receptor that plays critical roles in inflammatory reactions. FPR2-specific interaction can be possibly used to facilitate the resolution of pathological inflammatory responses by enhancing endogenous anti-inflammation systems. Starting from our lead agonist 5, we designed new ureidopropanamides derivatives able to activate FPR2 in transfected cells and human neutrophils. The new FPR2 agonists showed good stability towards oxidative metabolism in vitro...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29101262/genome-wide-dna-methylation-analysis-reveals-a-prognostic-classifier-for-non-metastatic-colorectal-cancer-promcol-classifier
#17
Melanie Gündert, Dominic Edelmann, Axel Benner, Lina Jansen, Min Jia, Viola Walter, Phillip Knebel, Esther Herpel, Jenny Chang-Claude, Michael Hoffmeister, Hermann Brenner, Barbara Burwinkel
OBJECTIVE: Pathological staging used for the prediction of patient survival in colorectal cancer (CRC) provides only limited information. DESIGN: Here, a genome-wide study of DNA methylation was conducted for two cohorts of patients with non-metastatic CRC (screening cohort (n=572) and validation cohort (n=274)). A variable screening for prognostic CpG sites was performed in the screening cohort using marginal testing based on a Cox model and subsequent adjustment of the p-values via independent hypothesis weighting using the methylation difference between 34 pairs of tumour and normal mucosa tissue as auxiliary covariate...
November 3, 2017: Gut
https://www.readbyqxmd.com/read/29101251/the-methyltransferase-nsd3-promotes-antiviral-innate-immunity-via-direct-lysine-methylation-of-irf3
#18
Chunmei Wang, Qinlan Wang, Xiaoqing Xu, Bin Xie, Yong Zhao, Nan Li, Xuetao Cao
Lysine methylation is an important posttranslational modification, implicated in various biological pathological conditions. The transcription factor interferon regulatory factor 3 (IRF3) is essential for antiviral innate immunity, yet the mechanism for methylation control of IRF3 activation remains unclear. In this paper, we discovered monomethylation of IRF3 at K366 is critical for IRF3 transcription activity in antiviral innate immunity. By mass spectrometry analysis of IRF3-associated proteins, we identified nuclear receptor-binding SET domain 3 (NSD3) as the lysine methyltransferase that directly binds to the IRF3 C-terminal region through its PWWP1 domain and methylates IRF3 at K366 via its SET domain...
November 3, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29101031/a-deficiency-of-the-glun2c-subunit-of-the-n-methyl-d-aspartate-receptor-is-neuroprotective-in-a-mouse-model-of-ischemic-stroke
#19
Adam Holmes, Ning Zhou, Deborah L Donahue, Rashna Balsara, Francis J Castellino
The N-methyl-d-aspartate receptor (NMDAR) ion channel plays a pivotal role in the pathology of ischemic stroke. The functional receptor consists of two GluN1 subunits (a-h) and two GluN2 subunits (A/B/C/D), the expression of which are spatially and temporally regulated in pathological and physiological conditions. While the role of the GluN2A and GluN2B subunit in ischemic stroke has been well developed, the role of the GluN2C subunit in ischemia is not well understood. Following middle carotid artery occlusion (MCAO), GluN2C(-/-) male mice displayed similar volumes of infarct as wild-type (WT) mice...
October 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29100314/genes-encoding-neuropeptide-receptors-are-epigenetic-markers-in-patients-with-head-and-neck-cancer-a-site-specific-analysis
#20
Kiyoshi Misawa, Atsushi Imai, Daiki Mochizuki, Yuki Misawa, Shiori Endo, Seiji Hosokawa, Ryuji Ishikawa, Masato Mima, Kazuya Shinmura, Takeharu Kanazawa, Hiroyuki Mineta
Staging and pathological grading systems are useful but imperfect predictors of recurrence in head and neck squamous cell carcinoma (HNSCC). To identify potential prognostic markers, we examined the methylation status of eight neuropeptide receptor gene promoters in 231 head and neck squamous cell carcinomas. The NPFFR1, NPFFR2, HCRTR1, HCRTR2, NPY1R, NPY2R, NPY4R, and NPY5R promoters were methylated in 80.5%, 79.2%, 67.1%, 73.2%, 35.1%, 36.4%, 38.5%, and 35.9% of the samples, respectively. In a multivariate Cox proportional hazards analysis, the odds ratio for recurrence was 2...
September 29, 2017: Oncotarget
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