نتایج جستجو برای: epigenetic

تعداد نتایج: 38423  

Journal: :Integrative and comparative biology 2013
Brendan G Hunt Karl M Glastad Soojin V Yi Michael A D Goodisman

Epigenetic inheritance plays a fundamentally important role in mediating gene regulation and phenotypic plasticity. DNA methylation, in particular, has been the focus of many recent studies aimed at understanding the function of epigenetic information in insects. An understanding of DNA methylation, however, requires knowledge of its context in relation to other epigenetic modifications. Here, ...

Journal: :Human molecular genetics 2007
Matthias Schaefer Madeleine Meusburger Frank Lyko

Many paradigms for our understanding of cancer etiology have been shaped in mammalian model systems. However, it has become evident that both genetic and epigenetic components actively influence the progression and severity of cancers. The complexity of epigenetic mechanisms in mammals has invigorated the use of non-mammalian model organisms in several research areas. Key contributions from thi...

Journal: :BioEssays : news and reviews in molecular, cellular and developmental biology 2010
Cora Mund Frank Lyko

Over the past few years several drugs that target epigenetic modifications have shown clinical benefits, thus seemingly validating epigenetic cancer therapy. More recently, however, it has become clear that these drugs are either characterized by low specificity or that their target enzymes have low substrate specificity. As such, clinical proof-of-concept for epigenetic cancer therapies remain...

2011
Robert E. Furrow Freddy B. Christiansen Marcus W. Feldman

Genome-wide association studies have thus far failed to explain the observed heritability of complex human diseases. This is referred to as the "missing heritability" problem. However, these analyses have usually neglected to consider a role for epigenetic variation, which has been associated with many human diseases. We extend models of epigenetic inheritance to investigate whether environment...

Journal: :Mutation research 2011
Singh Rajender Kelsey Avery Ashok Agarwal

Epigenetic modifications characterized by DNA methylation, histone modifications, and chromatin remodeling are important regulators in a number of biological processes, including spermatogenesis. Several genes in the testes are regulated through epigenetic mechanisms, indicating a direct influence of epigenetic mechanisms on the process of spermatogenesis. In the present article, we have provid...

2011
Gene H. Kim John J. Ryan Glenn Marsboom Stephen L. Archer

Epigenetics refers to changes in phenotype and gene expression that occur without alterations in DNA sequence. Epigenetic modifications of the genome can be acquired de novo and are potentially heritable. This review focuses on the emerging recognition of a role for epigenetics in the development of pulmonary arterial hypertension (PAH). Lessons learned from the epigenetics in cancer and neurod...

Journal: :Neurobiology of disease 2010
Patrick O McGowan Moshe Szyf

An organism's behavioral and physiological and social milieu influence and are influenced by the epigenome, which is composed predominantly of chromatin and the covalent modification of DNA by methylation. Epigenetic patterns are sculpted during development to shape the diversity of gene expression programs in the organism. In contrast to the genetic sequence, which is determined by inheritance...

2013
Takeo Kubota Kunio Miyake Takae Hirasawa

Epigenetic mechanisms are essential for normal development during embryogenesis and for differentiation of neural cells. Thus, precise understanding of epigenetic mechanisms, including DNA methylation and histone modification, is important to elucidate the pathogenic pathways in neurodevelopmental disorders. These include various congenital disorders caused by failures of genomic imprinting, X ...

2017
Yang Gao Andrew E. Teschendorff

Cancer is characterized by both genetic and epigenetic alterations. While cancer driver mutations and copy-number alterations have been studied at a systems-level, relatively little is known about the systems-level patterns exhibited by their epigenetic counterparts. Here we perform a pan-cancer wide systems-level analysis, mapping candidate cancer-driver DNA methylation (DNAm) alterations onto...

Ali Akbar Samadani, Mehrnaz Ajourlou, Mohaddese Shokravi, Mohamad Taghi Hamidian, Seyedeh Elham Norollahi,

The epigenetic alterations like histone modifications , DNA methylation and others remarkable categories  including nucleosome remodeling and RNA mediated targeting have been strongly investigated  recently .In this way , beside the notable importance of DNA methylation ,the histone modifications are the most important issues in the  tumorogenesis and cancer progression. Moreover...

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