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DNA methylation immune response

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https://www.readbyqxmd.com/read/29760811/global-dna-methylation-changes-spanning-puberty-are-near-predicted-estrogen-responsive-genes-and-enriched-for-genes-involved-in-endocrine-and-immune-processes
#1
Emma E Thompson, Jessie Nicodemus-Johnson, Kyung Won Kim, James E Gern, Daniel J Jackson, Robert F Lemanske, Carole Ober
Background: The changes that occur during puberty have been implicated in susceptibility to a wide range of diseases later in life, many of which are characterized by sex-specific differences in prevalence. Both genetic and environmental factors have been associated with the onset or delay of puberty, and recent evidence has suggested a role for epigenetic changes in the initiation of puberty as well. Objective: To identify global DNA methylation changes that arise across the window of puberty in girls and boys...
2018: Clinical Epigenetics
https://www.readbyqxmd.com/read/29747595/the-search-for-a-melanoma-tailored-chemotherapy-in-the-new-era-of-personalized-therapy-a-phase-ii-study-of-chemo-modulating-temozolomide-followed-by-fotemustine-and-a-cooperative-study-of-goim-gruppo-oncologico-italia-meridionale
#2
Michele Guida, Stefania Tommasi, Sabino Strippoli, Maria Iole Natalicchio, Simona De Summa, Rosamaria Pinto, Antonio Cramarossa, Anna Albano, Salvatore Pisconti, Michele Aieta, Ruggiero Ridolfi, Amalia Azzariti, Gabriella Guida, Vito Lorusso, Giusepe Colucci
BACKGROUND: It is frequently asked whether chemotherapy can still play a role in metastatic melanoma considering the effectiveness of the available drugs today, including antiCTLA4/antiPD1 immunotherapy and antiBRAF/antiMEK inhibitors. However, only approximately half of patients respond to these drugs, and the majority progress after 6-11 months. Therefore, a need for other therapeutic options is still very much apparent. We report the first large trial of a sequential full dose of fotemustine (FM) preceded by a low dose of temozolomide (TMZ) as a chemo-modulator in order to inactivate the DNA repair action of O(6)-methylguanine DNA-methyltransferase (MGMT)...
May 10, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29740313/epigenome-wide-association-study-of-soluble-tumor-necrosis-factor-receptor-2-levels-in-the-framingham-heart-study
#3
Michael M Mendelson, Roby Johannes, Chunyu Liu, Tianxiao Huan, Chen Yao, Xiao Miao, Joanne M Murabito, Josée Dupuis, Daniel Levy, Emelia J Benjamin, Honghuang Lin
Background: Transmembrane tumor necrosis factor (TNF) receptors are involved in inflammatory, apoptotic, and proliferative processes. In the bloodstream, soluble TNF receptor II (sTNFR2) can modify the inflammatory response of immune cells and is predictive of cardiovascular disease risk. We hypothesize that sTNFR2 is associated with epigenetic modifications of circulating leukocytes, which may relate to the pathophysiology underlying atherogenic risk. Methods: We conducted an epigenome-wide association study of sTNFR2 levels in the Framingham Heart Study Offspring cohort (examination 8; 2005-2008)...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29719061/hypermethylation-of-il-10-gene-is-responsible-for-its-low-mrna-expression-in-beh%C3%A3-et-s-disease
#4
Shahriar Alipour, Mohammad Nouri, Alireza Khbbazi, Nasser Samadi, Zohreh Babaloo, Somayeh Abolhasani, Jafar Farhadi, Neda Roshanravan, Golamreza Jadideslam, Ebrahim Sakhimia
Interleukin-10 (IL-10), produced generally by monocyte, T helper type 2 (Th2), and regulatory T cells (Treg), plays a central role in controlling inflammatory responses and regulating the immune response of the IL-10 mRNA expression. It is significantly down-regulated in many autoimmune diseases such as Behçet's disease; this is mostly associated with more aggressive complications. Nevertheless, the essential molecular process for its low expression has not been completely realized. The aim of this project was attempted to estimate the gene expression, promoter methylation, and protein levels to IL-10's down-regulated expression...
May 2, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29692205/integration-of-dna-methylation-health-scores-identifies-subtypes-in-myalgic-encephalomyelitis-chronic-fatigue-syndrome
#5
Wilfred C de Vega, Lauren Erdman, Suzanne D Vernon, Anna Goldenberg, Patrick O McGowan
AIM: To identify subtypes in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) based on DNA methylation profiles and health scores. METHODS: DNA methylome profiles in immune cells were integrated with symptomatology from 70 women with ME/CFS using similarity network fusion to identify subtypes. RESULTS: We discovered four ME/CFS subtypes associated with DNA methylation modifications in 1939 CpG sites, three RAND-36 categories and five DePaul Symptom Questionnaire measures...
April 25, 2018: Epigenomics
https://www.readbyqxmd.com/read/29687888/epigenetics-of-aberrant-cardiac-wound-healing
#6
Adam Russell-Hallinan, Chris J Watson, John A Baugh
Remodeling of cardiac tissue architecture is essential for normal organ development and maintaining homeostasis after injury. Injurious insults to the heart, such as hypertension and myocardial infarction, promote cellular responses including stimulation of resident inflammatory cells, activation of endothelial cells and recruitment of immune cells, hypertrophy of cardiomyocytes, and activation of fibroblasts. The physiological goal of this coordinated cellular response is to repair damaged tissue while maintaining or restoring cardiac contractile function...
March 26, 2018: Comprehensive Physiology
https://www.readbyqxmd.com/read/29676642/immunomethylomics-a-novel-cancer-risk-prediction-tool
#7
Karl T Kelsey, John K Wiencke
There is emerging evidence that the immune biology associated with lung and other solid tumors, as well as patient immune genetic traits, contributes to individual survival. At this time, dramatic advances in immunologic approaches to the study and management of human cancers are taking place, including lung and head and neck squamous cell carcinoma. However, major obstacles for therapies are the profound immune alterations in blood and in the tumor microenvironment that arise in tandem with the cancer. Although there is a significant current effort underway across the cancer research community to probe the tumor environment to uncover the dynamics of the immune response, little similar work is being done to understand the dynamics of immune alterations in peripheral blood, despite evidence showing the prognostic relevance of the neutrophil/lymphocyte ratio for these cancers...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29616066/modify-the-histone-to-win-the-battle-chromatin-dynamics-in-plant-pathogen-interactions
#8
REVIEW
Juan S Ramirez-Prado, Sophie J M Piquerez, Abdelhafid Bendahmane, Heribert Hirt, Cécile Raynaud, Moussa Benhamed
Relying on an immune system comes with a high energetic cost for plants. Defense responses in these organisms are therefore highly regulated and fine-tuned, permitting them to respond pertinently to the attack of a microbial pathogen. In recent years, the importance of the physical modification of chromatin, a highly organized structure composed of genomic DNA and its interacting proteins, has become evident in the research field of plant-pathogen interactions. Several processes, including DNA methylation, changes in histone density and variants, and various histone modifications, have been described as regulators of various developmental and defense responses...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29603746/mbd2-enables-tumourigenesis-within-the-intestine-while-preventing-tumour-promoting-inflammation
#9
Stephanie May, Heather Owen, Toby J Phesse, Kirsty R Greenow, Gareth-Rhys Jones, Adam Blackwood, Peter C Cook, Christopher Towers, Awen M Gallimore, Geraint T Williams, Michael Stürzl, Nathalie Britzen-Laurent, Owen J Sansom, Andrew S MacDonald, Adrian P Bird, Alan R Clarke, Lee Parry
Epigenetic regulation plays a key role in the link between inflammation and cancer. Here we examine Mbd2, which mediates epigenetic transcriptional silencing by binding to methylated DNA. In separate studies the Mbd2-/- mouse has been shown to be (1) resistant to intestinal tumourigenesis and (2) have an enhanced inflammatory/immune response; observations that are inconsistent with the links between inflammation and cancer. To clarify its role in tumourigenesis and inflammation, we used constitutive and conditional models of Mbd2 deletion to explore its epithelial and non-epithelial roles in the intestine...
March 30, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29594113/interplay-of-inflammatory-mediators-with-epigenetics-and-cartilage-modifications-in-osteoarthritis
#10
REVIEW
Swarna Raman, Una FitzGerald, J Mary Murphy
Osteoarthritis (OA), a degenerative disease of diarthrodial joints, is influenced by mechanical and inflammatory factors with aging, obesity, chronic injuries, and secondary diseases thought to be major factors driving the process of articular cartilage degeneration. Chondrocytes, the cellular component of cartilage, reside in an avascular environment and normally have limited potential to replicate. However, extrinsic factors such as injury to the joint or intrinsic alterations to the chondrocytes themselves can lead to an altered phenotype and development of OA...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29587528/diet-dependent-changes-in-the-intestinal-dna-methylome-after-introduction-of-enteral-feeding-in-preterm-pigs
#11
Xiaoyu Pan, Desheng Gong, Fei Gao, Per Torp Sangild
AIM: To examine how enteral feeding affects the intestinal epigenome and gene expression just after preterm birth. MATERIALS & METHODS: Intestinal tissue from preterm pigs, modeling preterm infants, was collected at birth and 5 days after gradual introduction of infant formula or bovine colostrum. The intestinal tissue was analyzed by reduced representation bisulfite sequencing and real-time qPCR. RESULTS: Relative to colostrum, formula increased bacterial epithelial adherence and LBP (lipopolysaccharide binding protein) expression, which was regulated by promoter methylation...
March 28, 2018: Epigenomics
https://www.readbyqxmd.com/read/29580369/mechanism-of-activation-of-the-bnlf2a-immune-evasion-gene-of-epstein-barr-virus-by-zta
#12
Rajaei Almohammed, Kay Osborn, Sharada Ramasubramanyan, Ijiel Barak Naranjo Perez-Fernandez, Anja Godfrey, Erika J Mancini, Alison J Sinclair
The human gamma herpes virus Epstein-Barr virus (EBV) exploits multiple routes to evade the cellular immune response. During the EBV lytic replication cycle, viral proteins are expressed that provide excellent targets for recognition by cytotoxic T cells. This is countered by the viral BNLF2a gene. In B cells during latency, where BNLF2a is not expressed, we show that its regulatory region is embedded in repressive chromatin. The expression of BNLF2a mirrors the expression of a viral lytic cycle transcriptional regulator, Zta (BZLF1, EB1, ZEBRA), in B cells and we propose that Zta plays a role in up-regulating BNLF2a...
March 26, 2018: Journal of General Virology
https://www.readbyqxmd.com/read/29558349/-epigenetic-disturbances-in-systemic-lupus-erythematosus
#13
Magdalena Dryglewska, Bogdan Kolarz, Maria Majdan
Systemic lupus erythematosus (SLE) is a chronic inflammatory autoimmune disease that results in uncontrolled immune system activation and overproduction of autoantibodies. The pathogenesis of the disease is complex and not fully understood, nevertheless, genetic and environmental factors play an important role. So far, about 30 genes have been identified to be involved in the SLE pathomechanism. However, not all genetically predisposed individuals develop the disease. This phenomenon can be associated with epigenetic changes that occur under the influence of environmental factors...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29556023/demethylator-phenotypes-in-acute-myeloid-leukemia
#14
Andrew D Kelly, Jozef Madzo, Priyanka Madireddi, Patricia Kropf, Charly R Good, Jaroslav Jelinek, Jean-Pierre J Issa
Acute myeloid leukemia (AML) often harbors mutations in epigenetic regulators, and also has frequent DNA hypermethylation, including the presence of CpG island methylator phenotypes (CIMPs). Although global hypomethylation is well known in cancer, the question of whether distinct demethylator phenotypes (DMPs) exist remains unanswered. Using Illumina 450k arrays for 194 patients from The Cancer Genome Atlas, we identified two distinct DMPs by hierarchical clustering: DMP.1 and DMP.2. DMP.1 cases harbored mutations in NPM1 (94%), FLT3 (71%) and DNMT3A (61%)...
March 7, 2018: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29549885/epigenetic-impacts-of-stress-priming-of-the-neuroinflammatory-response-to-sarin-surrogate-in-mice-a-model-of-gulf-war-illness
#15
David G Ashbrook, Benjamin Hing, Lindsay T Michalovicz, Kimberly A Kelly, Julie V Miller, Wilfred C de Vega, Diane B Miller, Gordon Broderick, James P O'Callaghan, Patrick O McGowan
BACKGROUND: Gulf War illness (GWI) is an archetypal, medically unexplained, chronic condition characterised by persistent sickness behaviour and neuroimmune and neuroinflammatory components. An estimated 25-32% of the over 900,000 veterans of the 1991 Gulf War fulfil the requirements of a GWI diagnosis. It has been hypothesised that the high physical and psychological stress of combat may have increased vulnerability to irreversible acetylcholinesterase (AChE) inhibitors leading to a priming of the neuroimmune system...
March 17, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29546377/the-long-term-impact-of-folic-acid-in-pregnancy-on-offspring-dna-methylation-follow-up-of-the-aberdeen-folic-acid-supplementation-trial-afast
#16
Rebecca C Richmond, Gemma C Sharp, Georgia Herbert, Charlotte Atkinson, Caroline Taylor, Sohinee Bhattacharya, Doris Campbell, Marion Hall, Nabila Kazmi, Tom Gaunt, Wendy McArdle, Susan Ring, George Davey Smith, Andy Ness, Caroline L Relton
Background: It has been proposed that maternal folic-acid supplement use may alter the DNA-methylation patterns of the offspring during the in-utero period, which could influence development and later-life health outcomes. Evidence from human studies suggests a role for prenatal folate levels in influencing DNA methylation in early life, but this has not been extended to consider persistent effects into adulthood. Methods: To better elucidate the long-term impact of maternal folic acid in pregnancy on DNA methylation in offspring, we carried out an epigenome-wide association study (EWAS) nested within the Aberdeen Folic Acid Supplementation Trial (AFAST-a trial of two different doses: 0...
March 12, 2018: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29545724/differential-dna-methylation-profiles-of-human-b-lymphocytes-and-epstein-barr-virus-immortalized-b-lymphocytes
#17
Chaoting Zhang, Rui Zhang, Zhiqiang Chen, Jing Chen, Jigang Ruan, Zheming Lu, Hongchao Xiong, Wenjun Yang
Objective: This study aimed to comprehensively assess Epstein-Barr virus (EBV)-induced methylation alterations of B cell across whole genome. Methods: We compared DNA methylation patterns of primary B cells and corresponding lymphoblastoid cell lines (LCLs) from eight participants. The genome-wide DNA methylation profiles were compared at over 850,000 genome-wide methylation sites. Results: DNA methylation analysis revealed 87,732 differentially methylated CpG sites, representing approximately 12...
February 2018: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/29531579/induction-of-immune-responses-by-dna-vaccines-formulated-with-dendrimer-and-poly-methyl-methacrylate-pmma-nano-adjuvants-in-balb-c-mice-infected-with-leishmania-major
#18
Fatemeh Tabatabaie, Nasim Samarghandi, Somayeh Zarrati, Fatemeh Maleki, Mehdi Shafiee Ardestani, Taher Elmi, Sayed Hussain Mosawi
BACKGROUND: Leishmaniasis is a parasitic disease induced by a protozoan from the genus Leishmania . No effective vaccine has yet been developed against the disease. AIM: In this work, two nano-vaccines, TSA recombinant plasmid and dendrimer and poly (methyl methacrylate) (PMMA) nanoparticles (as adjuvants), were designed and tested for their immunogenicity in BALB/c mice. METHODS: After the plasmid construction and preparation of adjuvants, three intramuscular injections of the nano-vaccines (100 µg) and the recombinant TSA protein (20 µg) were subcutaneously performed...
February 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29530602/drug-induced-xenogenization-of-tumors-a-possible-role-in-the-immune-control-of-malignant-cell-growth-in-the-brain
#19
REVIEW
Ornella Franzese, Fiorenzo Battaini, Grazia Graziani, Lucio Tentori, Maria Luisa Barbaccia, Angelo Aquino, Mario Roselli, Maria Pia Fuggetta, Enzo Bonmassar, Francesco Torino
In recent years, immune checkpoint inhibitors (ICpI) have provided the ground to bring tumor immunity back to life thanks to their capacity to afford a real clinical benefit in terms of patient's survival. Essential to ICpI success is the presence of tumor-associated neoantigens generated by non-synonymous mutations, since a direct relationship between mutation load of malignant cells and susceptibility to ICpI has been confidently established. However, it has been also suggested that high intratumor heterogeneity (ITH) associated with subclonal neoantigens could not elicit adequate immune responses...
March 9, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29527415/identification-and-characterization-of-the-cytosine-5-dna-methyltransferase-gene-family-in-salvia-miltiorrhiza
#20
Jiang Li, Caili Li, Shanfa Lu
Cytosine DNA methylation is highly conserved epigenetic modification involved in a wide range of biological processes in eukaryotes. It was established and maintained by cytosine-5 DNA methyltransferases (C5-MTases) in plants. Through genome-wide identification, eight putative SmC5-MTase genes were identified from the genome of Salvia miltiorrhiza , a well-known traditional Chinese medicine material and an emerging model medicinal plant. Based on conserved domains and phylogenetic analysis, eight SmC5-MTase genes were divided into four subfamilies, including MET , CMT , DRM and DNMT2 ...
2018: PeerJ
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