Epigenetic in Biological News

Study reveals a reprogrammed role for the androgen receptor

... cells, they found a group of genes with epigenetic markings tiny attachments to DNA that switchs ... cells. It's not known what causes those epigenetic changes to occur, but "we are profiling the genome-wide epigenetic landscape of androgen-dependent and -independent ...

Cancer's distinctive pattern of gene expression could aid early screening and prevention

... adjustments that enable cancer cells to thrive. epigenetic changes actually are more common than the genetic ... even physical activity levels can result in these epigenetic changes that contribute to cancer and other ... Coalition Scholar. But why tumors have so many epigenetic changes compared to healthy tissue is one of many ...

Pushmi-pullyu of B-cell development discovered

... sort of pushmi-pullyu manner to induce or retard epigenetic changes that allow for the development of a B ... being activated. These factors are considered epigenetic states, modifications to existing DNA that ... they dubbed a 'pioneer factor.' By altering the epigenetic state of several genes, it is estimated that EBF ...

New piece found in the puzzle of epigenetics

... that the enzyme TFIIH kinase is involved in epigenetic regulation. The scientists were interested in ... has been identified that plays a key role in epigenetic regulation by means of RNA polymerase II," ... is of great significance because knowledge of epigenetic mechanisms is necessary in order to better ...

Specific genetic cause of fetal alcohol-related developmental disorders found

... womb leads to cognitive impairments by inducing epigenetic alterationschanges to DNA that do not alter the ... that fetal alcohol exposure disrupts the epigenetic "imprinting" of Dio3. In this process, Dio3 ... gene, while the maternal gene is silenced by epigenetic control. But alcohol exposure changes the ...

100 reasons to change the way we think about genetics

... be passed on to offspringa phenomenon known as epigenetic inheritance. An article forthcoming in the July ... Biology lists over 100 well-documented cases of epigenetic inheritance between generations of organisms, and ... have suspected for years that some kind of epigenetic inheritance occurs at the cellular level. The ...

New nucleotide could revolutionize epigenetics

... DNA code, opening an entirely new front in epigenetic research. The work, conducted in Nathaniel ... factors that manage this regulation. One key epigenetic player is DNA methylation, which targets sites ... from one another, Kriaucionis was analyzing the epigenetic makeup of the cells when he came across ...

Ali Shilatifard and colleagues aim to clarify the definition of 'epigenetics'

... Laboratory in New York to discuss aspects of epigenetic control in genomic function and to develop a ... about the distinction between the mechanisms of epigenetic memory during early development versus those of ... throughout adult life. The mechanisms underlying epigenetic memory are of great importance to human ...

Getting down to cancer basics

... about changes in activity of other genes through epigenetic changes - their activity is changed by ... genetic change with consequences at the level of epigenetic regulation," explains Professor Mike Stratton, ... look at cancers, a substantial proportion of the epigenetic disregulation may well have a genetic basis." ...

'Experiment of nature' examines how mother's diet may impact on child's health

... diet during pregnancy can influence these epigenetic effects. The study will be conducted at the ... patterns, this could prove very important as epigenetic changes mediated by DNA methylation are likely to ... II diabetes," says Dr Hennig. "We think these epigenetic changes are established very early on in the ....

CSHL scientists discover how 'companion' cells to sperm protect them from genetic damage

... DNA from being expressed. Scientists call these epigenetic modifications; they alter patterns of gene ... multicellular organisms, these genome-protecting epigenetic modifications must occur in each generation to ... In animals, there is good evidence that epigenetic marks are first wiped clean and then reset in the ...

Large DNA stretches, not single genes, shut off as cells mature

... M.D., M.P.H., led an investigation of a kind of epigenetic modification to histones, the molecular "spools" ... This modification is a variety of the so-called epigenetic changes that alter the function of cells without ... been looking at the individual trees." Because epigenetic changes also are known to play a role in abnormal ...

Rethinking the genetic theory of inheritance

... and his team conducted a comprehensive epigenetic analysis of 100 sets of monozygotic and dizygotic ... activities. These DNA modifications are called epigenetic factors." The CAMH study showed that epigenetic factors acting independently from DNA were more ...

Growth of new brain cells requires 'epigenetic' switch

... depends on a protein that is involved in changing epigenetic marks in the cell's genetic material. "How is ... change that has long-lasting effects is so-called epigenetic change, which can alter a cell's DNA without ... "It's been controversial that Gadd45b can promote epigenetic changes like global DNA demethylation, but we ...

CSHL researchers map changing epigenetic modifications that enable transposons to run amok

... the ambitious task of mapping the changing epigenetic landscape of continuously dividing plant cells, ... team has succeeded in capturing in detail epigenetic alterations and the molecular players that allow ... coaxed to grow endlessly in culture dishes -- the epigenetic changes resulting in a loss of heterochromatin ...

Plants display 'molecular amnesia'

... for the first time the reversal of what is called epigenetic silencing in plants. The findings are ... the discovery may lead to new insights into how epigenetic processes work in the human body, which could ... sequence. However, like changes in DNA sequence, epigenetic modifications can be passed on from parent cell ...

CSHL scientists discover a new way in which epigenetic information is inherited

... an "on" gene should produce. One way in which epigenetic information is known to be passed from parent to ... discovered that a class of small RNAs does carry epigenetic information and in fact passes on the trait of ... doubled the number of mechanisms by which epigenetic information is known to be inherited." The ...

Fountain of Youth to be found in the anthill?

... caused by alterations in the DNA sequence. epigenetic changes occur during normal development and ... little is known about the molecular basis for epigenetic changes that underlie aging or behavior," Liebig ... HHMI team to examine a different aspect of how epigenetic factors can influence outcomes in behavior, ...

October 2008 Biology of Reproduction highlights

... early developmental stages are unknown, although epigenetic processes have been suspected. Morgan et al. elegantly bolster the epigenetic hypothesis in a paper on p. 618 of this issue. ... for preimplantation development affected epigenetic regulation of the A vy locus. Thus, culture ...

'Addicted' cells provide early cancer diagnosis

... of cancer cells is partly due to mistakes in this epigenetic code, some of which switch on genes for growth, ... the possibility that such mistakes in the epigenetic code may begin to occur in apparently normal ... understanding of human health. Understanding how epigenetic processes work to maintain healthy cells and ...

Scientists clarify a mechanism of epigenetic inheritance

... Epigenetics in Yeast We have not understood epigenetic inheritance very well, says Dr. Martienssen, a ... is easy to study, in part because it lacks other epigenetic inheritance mechanisms, such as chemical ... Martienssen says, there is a whole slew of epigenetic phenomena that are sensitive to temperature. ...

Charting the epigenome

... genome, stem cells capacity to self-renew and how epigenetic factors contribute to the development of tumors ... of our study was to integrate multiple levels of epigenetic information since we still have a very poor ... could start to unravel the multiple layers of epigenetic regulation that control gene expression, he had ...

Computation to unravel how genes are regulated and shed light on how cells become different

... most challenging goals, understanding how epigenetic marks contribute to regulation of gene ... (ESF), Computational Approaches to the Role of epigenetic Marks in Transcription Regulation. Epigenetics ... itself. It has been well established that epigenetic features influence the transcription process ...

Epigenetic changes discovered in major psychosis

... Scientists have discovered epigenetic changes (i.e. chemical changes to a gene that do ... Petronis, senior scientist in the Krembil Family epigenetic Laboratory at the Centre for Addiction and Mental ... one in every two hundred of these genes showed an epigenetic difference in the brains of psychiatric patients. ...

Environmental epigenetics has potential for preventing and treating disease

... and Molecular Mutagenesis examines some of the epigenetic mechanisms linked to disease, and explores how ... imprinting, a form of gene regulation in which epigenetic modifications in chromosomes result in ... forms of a gene that are expressed due to epigenetic modifications linked to maternal nutrition and ...

USC researchers explore genetic causes for male infertility

... first report based on our knowledge that a broad epigenetic defect is associated with abnormal semen ... well documented. Attention is now focused on epigenetic changes. epigenetic change, which is defined as in addition to ...

How schizophrenia develops: Major clues discovered

... scientists discovered that defects in specific epigenetic actions biochemical reactions that regulate gene ... Another enzyme, Mll1, may play a role in the epigenetic actions. For genes to be turned on, temporary ... medications like clozapine appear to correct this epigenetic flaw. This raises the possibility of developing ...

Einstein researcher receives NIH grant to explore epigenetic regulation of the human genome

... do not result from changes in DNA sequence. These epigenetic changes can be passed on from one cell generation to the next. The epigenetic regulation of genesturning them on and offis crucially important: Glitches in epigenetic control mechanisms, for example, have been found ...

Human embryonic stem cells remain embryonic because of epigenetic factors

... H3K4me3 and H3K27me3, are among the so-called epigenetic modifications that influence the activity ... how ES cell genes are modified by these epigenetic markers may explain these cells unique ... discovered that genes modified only by one of the epigenetic markers, H3K4me3, contain the DNA recipes for ...

Therapeutic cloning gets a boost with new research findings

... rates of spontaneous mutation development. They attribute this finding to epigenetic reprogramming. It is known in the scientific community that germ cells ... (the donor cells in SCNT) have higher mutation rates and less stringent epigenetic programming to avoid mutations than germ cells, but offspring produced ...

Gene switch sites found mainly on 'shores,' not just 'islands' of the human genome

... involve methylation chemistry. Methylation is one of several so-called epigenetic modifications that affect which genes are expressed without changing the ... liver and spleen tissues they had examined. "This suggests that the epigenetic changes we see in cancer are leading cells to look and behave like other ...

International public-private partnership offers new paradigm for medicinal chemistry

... small molecule inhibitors "chemical probes" for 25 proteins involved in epigenetic signalling, and to release these probes into the public domain with no ... specifically designed to affect the activity of proteins involved in epigenetic control. They will complement genetic knockouts and RNAi approaches to ...

Broad Institute awarded major grant to bolster epigenomics research

... depth, we will lay the critical groundwork for future insights into the epigenetic basis of a variety of diseases, including cancers." An overarching ... vast resource for the scientific community to enhance the understanding of epigenetic mechanisms of disease, pinpoint novel molecular targets for therapy, ...

Study identifies changes to DNA in major depression and suicide

... turned on. The remaining genes that are not expressed are shut down by an epigenetic process called DNA methylation." The rate of methylation in the ... that the genome is so malleable in the brain is surprising. Finding that epigenetic mechanisms continue to influence gene expression is pretty unusual," says ...

'Smothered' genes combine with mutations to yield poor outcome in cancer patients

... cancer. While mutations alter pathways by rewriting the gene's DNA code, epigenetic marks affect genes without changing the code itself. "Until studies ... "We've learned from this study that we must include both genetic and epigenetic changes when we do future microarray analyses to increase our ...

Genome communication

... copy, and those changes are passed down to the next generation. These epigenetic alterations, called paramutations may be important in introducing changes ... and have identified some of the genes and mechanisms that operate in this epigenetic process. Dr. Chandler, of the Department of Plant Sciences at the ...

Epigenetic research uncovers new targets for modification enzymes

... "This discovery broadens our view of methyltransferases and tells us that epigenetic regulation in cells is even more complicated than we thought," says ... will continue to help us unwind the multiple mechanisms involved in epigenetic gene regulation." ...

Epigenetic regulation by the MMB/dREAM complex

... progression of cell cycle, this paper is the first demonstration of epigenetic regulation of gene expression by Myb and E2F2-RB via the MMB/dREAM ... RB pathways that occur in most human cancers are likely to cause similar epigenetic changes in gene expression. The use of the model organism Drosophila was ...

DNA methylation shown to promote development of colon tumors

... and packaging of DNA by proteins and other molecules (often referred to epigenetic mechanisms) regulate the activity of certain genes and genetic regions, ... has the identical DNA sequence the "packaging" of this DNA by these epigenetic mechanisms is a key element in determining cell identity and helps ...

Duke scientists map imprinted genes in human genome

... Jirtle, who has studied imprinting for years, notes that imprinting is an epigenetic event, meaning its something that can change a genes function without ... in our environment even what we eat, drink, and breathe. On top of that, epigenetic changes can be inherited. I dont think people realize that. Several ...