Jeffrey M. Smith
See book keywords and concepts |  Epigenetics
Recent breakthroughs in the field of epigenetics have revolutionized our understanding of gene expression and add an unprecedented risk of GM foods. Not only will nutritional imbalances and metabolic disturbances affect infant health, they can even influence gene expression "and may even be transmitted to the next generation."5
This concept was illustrated by a remarkable study, featured on the cover of a 2003 issue of Molecular and Cellular Biology. |
Ann M. Coulston and Carol J. Boushey
See book keywords and concepts |  More advanced techniques, such as microarray analysis and whole-genome scans, are also being utilized to understand the complexities of the epigenetics of colorectal cancer.
C. Diet and Specific Mutations in Tumors
A spectrum of mutations occurs in colon cancer tumors, implying that multiple pathways to disease exist. The primary alterations observed in colon tumors are in the adenomatous polyposis coli (APC), Ki-ras, and p53 genes, and microsatellite instability [241]. Studies have reported approximately 85-90% of colon tumors have an APC mutation, although recent work by Samowitz et al. |
Jeffrey M. Smith
See book keywords and concepts | | It is unknown what caused this huge difference in Bt expression, but it is likely to be alterations in the molecular mechanisms that control overall patterns of gene function known as "epigenetics." These can change in response to environmental influences either natural or man-made.
Environment silences genes, boosts toxins
Scientists inserted a foreign gene into petunias, designed to turn petals red. Instead, flowers varied in both color and pattern. The variation was thought to be due to gene silencing brought about by a "position effect," i.e. |
Dr. Sharon Moalem
See book keywords and concepts |  The current focus in human epigenetics is on fetal development. It's now clear that the first few days after conception—when a mother may not even know she's pregnant—are even more critical than we've understood. That's when many important genes are switched on or off. And the earlier that epigenetic signals are transmitted, the more significant the potential changes are in the fetus. (In some ways, the womb may be like a tiny evolutionary laboratory, examining new traits to see whether they'll help the fetus survive and thrive; if they won't, the mother miscarries. | | That outside and above is where epigenetics gets its name— from the Greek prefix epi, meaning upon, after, or in addition.) This shouldn't have been a complete surprise—for fifty years, some researchers have pointed out that the same genes don't always produce the same results: identical twins (who share identical DNA) don't get the same diseases or fingerprints, just similar ones.
Second, the Duke study snuggled right up to the ghost of Lamarck. Environmental factors in the life of the mother were shown to affect the inheritance of traits in her offspring. | | First, epigenetics erased the conviction that genetic blueprints are written in indelible ink. Suddenly, science had to take into account the notion that a given set of genes is not an immutable set of blueprints or instructions. The exact same set of genes can produce different outcomes depending on which genes have undergone methylation and which have not. There was a whole new layer to consider—a set of reactions that acted outside and above the genetic code, changing its result without changing the code itself. | | Our understanding of epigenetics is so immature we have to be wary about unintended consequences. We just don't know what other genes may be influenced by pumping methyl donors into the food supply, and we probably won't know for years.
When doctors expect a pregnant woman to give birth prematurely, she is often injected with a drug, usually betamethasone, to help speed up the development of her fetus's lungs, dramatically improving its chance of survival. |
Erich Grotewold
See book keywords and concepts |  Since various aspects of the gene structure and regulation, genetics, epigenetics, biochemistry, and regulation of flavonoid biosynthesis have been reviewed recently (Springob et al, 2003; Schwinn and Davies, 2004; Tanner, 2004; Koes et al, 2005; Tanaka et al, 2005) and also discussed in other chapters of this book, we will focus on the biosynthesis and accumulation of 3-deoxyflavonoid (phlobaphene) pigments in maize (Zea mays) and sorghum {Sorghum bicolor) (Figure 6.2 | | The gene regulations she had characterized were later realized to include both genetic and epigenetic gene regulations (Fedoroff, 1989; Feschotte et al, 2002; Lippman and Martienssen, 2004). epigenetics has been defined as "The study of mitotically and/or meiotically heritable changes in gene function that cannot be explained by changes in DNA sequence" (Russo et al, 1996). Epigenetic modification may be observed as DNA methylation defects and/or chromatin modifications in plants (Lippman and Martienssen, 2004; Matzke and Birchler, 2005). | | Genetics and epigenetics in flower pigmentation associated with transposable elements in morning glories, Adv Biophys. 38: 141-159. Inagaki, Y., Hisatomi, Y., Suzuki, T., Kasahara, K. and Iida, S., 1994, Isolation of a Suppressormutator/Enhancer-\\ke transposable element, Tpnl, from Japanese morning glory bearing variegated flowers, Plant Cell 6: 375-383. Kambal, A. E. and Bate-Smith, E. C, 1976, A genetic and biochemical study on pericarp pigmentation between two cultivars of grain sorghum, Sorghum bicolor, Heredity 37: 417-421. Kawasaki, S. and Nitasaka, E. |
Peter h. Fraser and Harry Massey
See book keywords and concepts |  Biologists even have names for the formal studies of the feedback loops between cells and living organisms and their environments—systems biology and epigenetics (which means "control above genetics").
Cell biologist and former Princeton University professor Bruce Lipton, in his book The Biology of Belief, wrote about his own scientific and personal epiphany of how information (in the form of feedback between cells and their environments) constitutes intelligence in the body. |
Jeffrey M. Smith
See book keywords and concepts | | CC"\ Thile we have mounting evi-V V dences for epigenetics the outdated central dogma of the gene still exists — mainly in thefield of agro-biotechnology and commercial applications of GM crops. We seem to hang in a state of suspense. The stubborn perseverance with which some still cling to the old dogma might have to do with commercial pressures and with patents. It's easier to patent genes than to patent complex epigenetic networks. |
Ann M. Coulston and Carol J. Boushey
See book keywords and concepts | | Choline Deficiency Alters DNA Methylation in Fetal Brain
Although the relationship between nutrition and epigenetics has been firmly established [99], less is known about the role nutrition has in the epigenetic regulation of fetal brain development. However, available data allow us to identify an important role for choline in DNA methylation during brain development [100]. Global DNA methylation is decreased in the neuroepithelial layer of the hippocampus in choline-deficient mouse fetal brains [76], whereas opposite effects were reported in the fetal brains from Pemt ?I? |
Gregg Braden
See book keywords and concepts |  It's this huge reassessment that has led to an entire new branch of biology called epigenetics, defined as the study of "hidden influences upon the genes"—influences that can come from a number of sources, including the beliefs that control our DNA.8 This line of thinking is writing us back into the equation of life as powerful agents of change. These are the insights that will lead us to understand things such as the placebo effect and will explain why a man's belief about something that happened 2,000 years ago can manifest as the wounds on his body today. |
Dawson Church
See book keywords and concepts |  So while a study of rat pups might seem like an Ivory Tower exercise in epigenetics, the reality of nurturing in the real world makes a difference in the health and wellbeing of millions of people.
There are certainly lifestyle factors that make a big difference in our health and longevity Having a Body Mass Index of twenty-five or less, eating a diet rich in fruits and vegetables, daily aerobic exercise, avoiding smoking and excess alcohol—all these contribute to living to a ripe old age. There may be an epigenetic component to each of them too. |
David Steinman
See book keywords and concepts |  These inherited changes are caused by subtle,chemical influences, and this new field of scientific inquiry is called "epigenetics."18 The cancers also occurred during this time. M. D. Whorton and D. E. Foliart wrote in the September 1983 Mutation Research that DBCP became widely used on citrus fruit, grapes, peaches, pineapple, soybeans, and tomatoes. In Central America and Israel, banana trees were treated with DBCP. By 1975, 25 million pounds were being produced in the United States per year. The majority of U.S. |
Dawson Church
See book keywords and concepts | | Some come from the environment inside the body, while others are our body's response to signals from the environment that surrounds our body
While studying the static structure of the hard drive gives us lots of useful information, the signals that activate different sectors of the hard drive provide the source of the activation of that information. epigenetics looks at the sources that activate gene expression or suppression, and at the energy flows that modulate the process. | | It traces the signals from outside the cell that tell the genes what to do and when to do it, and looks for the forces from outside the cell that orchestrate the whole. epigenetics studies the environment, such as the signals that initiate stem cell differentiation and wound healing.
The activation of genes is intimately connected with healing and immune system function. | | It also often works better than mainstream medicine for many of the predominant disease of post-industrial cultures, such as autoimmune conditions and cancer.43 epigenetics gives us tools to understand why our health can be affected by so many different healing modalities.
We are comfortable with incremental exploration. Yet many changes are not incremental, but very sudden. The expansion of a balloon as air is injected is smooth and incremental. A balloon popping is sudden and discontinuous. Water heated in a kettle shows little change. |
Bruce H. Lipton
See book keywords and concepts |  In fact, epigenetics, the study of the molecular mechanisms by which environment controls gene activity, is today one of the most active areas of scientific research. The newly emphasized role of the environment in regulating gene activity was the focus of my cell research twenty-five years ago, long before the field of epigenetics was even established. |
Dawson Church
See book keywords and concepts | | The bottom of the iceberg is epigenetics," says Jirtle—and the larger scientific community is beginning to agree with him. In fact, in 2003, a Human Epigenome project was launched by a group of European scientists, and a U.S. project was proposed in December of 2005.6 uring tpigenetic Lhange
The pathway by which epigenetic signals affect the expression of genes has many steps. Diet is the one demonstrated by the Jirtle study. A second clue comes from a series of experiments that show that being nurtured generates chemical changes in the brain that trigger certain genes. Dr. |
Ann M. Coulston and Carol J. Boushey
See book keywords and concepts | | The role of DNA methylation in mammalian epigenetics. Science 293, 1068-1070.
88. Malone, C. S., Miner, M. D., Doerr, J. R., Jackson, J. P., Jacob-sen, S. E., Wall, R., and Teitell, M. (2001). CmC(A/T)GG DNA methylation in mature B cell lymphoma gene silencing. Proc. Natl. Acad. Sci. USA 98, 10404-10409.
89. Monk, M., Boubelik, M., and Lehnert, S. (1987). Temporal and regional changes in DNA methylation in the embryonic, extraembryonic and germ cell lineages during mouse embryo development. Development 99, 371-382.
90. Cerny, J., and Quesenberry, P. J. (2004). |
Dawson Church
See book keywords and concepts | | Lipton's discoveries, which ran counter to the established scientific view that life is controlled by the genes, presaged the new science of epigenetics. Two major scientific publications derived from these studies defined the molecular pathways connecting the mind and body.12 Many subsequent papers by other researchers have since validated his concepts and ideas3 Nowadays, Lipton lectures to conventional and complementary medical professionals and lay audiences about leading-edge science and how it dovetails with mind-body medicine and spiritual principles. |
Ann M. Coulston and Carol J. Boushey
See book keywords and concepts | | Included in this term is nutrigenetics, the study of the impact of genetic variation on the response to dietary components; nutritional epigenetics, the study of the effect of food-derived compounds on DNA structure other than base pairs, that is, on methylation and on chromatin structure; and nutritional
Nutritional Genomics and Proteomics
Genomic DNA
Epigenomic
CH3-DNA
Post-translational mRNA -? Proteins
Enzymes, structural, Transport, signalling caused by phosphorylation, glycosylation, etc. |
Dr. Sharon Moalem
See book keywords and concepts | | One thing is clear—it seems pretty certain that things we know to be bad for us can end up being bad for our descendants, as epigenetic markers get passed on from generation to generation. So smoking two packs a day and living a Super-Sized life may actually make your children—and even their children—more prone to disease.
But what about using methyl markers to have a positive influence on our kids? Folic acid and B12 worked for mice—will it work for humans? |
Mike Adams, the Health Ranger
See article keywords and concepts |  Epigenetic factors
There's also no mention of epigenetics in all this news about the human genome. As recently understood -- to the great surprise of the hard science community, no doubt -- epigenetic factors control the expression of genes, activating or deactivating them based on environmental factors such as nutrition or exposure to synthetic chemicals. |
Bruce H. Lipton
See book keywords and concepts | | The study of signal transduction is catapulting the membrane to center stage, just as the field of epigenetics is highlighting the role of the chromosome's proteins.
There are different kinds of behavior-controlling effector proteins because there are lots of jobs that need to be done for the smooth functioning of the cell. Transport proteins, for example, include an extensive family of channel proteins that shuttle molecules and information from one side of the membrane barrier to the other. Which brings us back to the pimentos in our bread, butter and olive sandwich. | | The newly emphasized role of the environment in regulating gene activity was the focus of my cell research twenty-five years ago, long before the field of epigenetics was even established. [Lipton 1977a, 1977b] While that is gratifying for me intellectually, I know that if I were teaching and researching in a medical school, my colleagues would still be wondering about those coconuts, because in the last decade I have become even more of a radical by academia's standards. My preoccupation with a new biology has become more than an intellectual exercise. | | I also introduce you to the exciting discoveries of epigenetics, a new field of biology that is unraveling the mysteries of how the environment (nature) influences the behavior of cells without changing the genetic code. It is a field that is uncovering new complexities in the nature of disease, including cancer and schizophrenia.
Chapter 3 is about the cell's membrane, the "skin" of the cell. You no doubt have heard more about the DNA-containing nucleus of the cell than you have about its membrane. | | The science of epigenetics has also made it clear that there are two mechanisms by which organisms pass on hereditary information. Those two mechanisms provide a way for scientists to study both the contribution of nature (genes) and the contribution of nurture (epigenetic mechanisms) in human behavior. If you only focus on the blueprints, as scientists have been doing for decades, the influence of the environment is impossible to fathom. |
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