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Epigénétique

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Un génome hérité de ses parents et un génome modifiable.

Your Genes May Determine What You Should Eat. If you’ve ever gotten the impression that certain people feel better as vegetarians than others, there may be something to that.

Your Genes May Determine What You Should Eat

As it turns out, there may be a gene that tells whether someone has adapted to be vegetarian, based on a genetic change in their ancestors. In a new Cornell study, published in the journal Nature Ecology and Evolution, researchers looked into the genes of modern Europeans and the effect that the introduction of farming, and the resulting dietary changes, had on genetic adaptations. In an earlier study by the same Cornell researchers in 2016, they investigated populations in India, Africa and parts of East Asia — in other words, places with historically vegetarian diets. There, the researchers discovered similar patterns in their genes that allowed them to more easily digest plants.

Love This? Thanks for subscribing! About 12,500 years ago, the Neolithic Revolution, or Agricultural Revolution, occurred. Photo credit: Laura Burge, author. Sensibilité au gluten : la preuve que ce n’est pas « dans la tête »

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Healing with Food. By Lisa Nicholson, contributor to Healing Recipes on Allthingshealing.com We eat every day, usually as many as 3-5 times a day.

Healing with Food

From work to exercise, from reading a book to watering the garden, from attending school to lounging on the sofa, food provides the fuel for our bodies to do all the activities we do in our daily lives. For some of us, eating is an integral part of our existence – we plan our days around our meals and make an effort to provide the highest quality fuel for our bodies. For some of us, eating is a bother – meal planning and preparation is just another thing which must be done in an already over filled day. Many of us fall in the middle of these two extremes. Most of us don’t think much about why we need to eat, beyond the fact that we are feeling hungry. Diet Affects Gene Expression. We all know that our eating habits impact our health.

Diet Affects Gene Expression

From the proper functioning of internal organs to the appearance of our skin, in many ways, we truly are what we eat. But a new study suggests that diet has an even deeper impact upon our bodies. The Duke University study suggests that what we eat impacts the way our genes are expressed. In the study, one group of rats was fed a nutritious diet while another was fed a diet lacking in folic acid. The former group consistently maintained darker hair, while the hair of the latter became blondish in color. If we are anything like rats, then, what we eat may not only impact us – it may impact the health of our children and grandchildren.

The study was intended primarily to illuminate ways in which dermatologists could help their patients improve the appearance of their skin. The typical American diet is much too high in refined carbohydrates, trans fat, saturated fat, and artificial ingredients. Air pollution actually messes with your genes. Breathing nasty urban pollution does more than clog up your lungs — it actually messes with your genes.

Air pollution actually messes with your genes

This disturbing news comes from a paper published last month, and could change the way we think about pollution. The study’s author, University of British Columbia researcher Chris Carlsten, put volunteers in a walled-in smog aquarium, exposed them to levels of air pollution similar to those found in the world’s most polluted cities, and then looked for changes at the level of the human genome. (Science!) Carlsten’s homemade pollution is technically just diesel exhaust — none of the nasty particulate matter that makes coal-burning countries’ smog especially deadly — but it’s plenty potent all the same, full of the kinds of volatile polycarbonates that we usually try to avoid.

X:enius - Epi-génétique. Un débat autour de l'actualité scientifique. Can You Change Your DNA? Is it possible to change our DNA from within ourselves?

Can You Change Your DNA?

Can we even alter our DNA blueprint? At the Institute of HeartMath, we have been researching these questions for over a decade. This is such an intriguing subject to me that I wanted to share some of the results with you and invite you into the conversation. First a little background on DNA. The DNA (deoxyribonucleic acid) in the nucleus of our cells contains the blueprint for our developing body and instructions for who we will become. Scientists used to believe that the DNA with which we are born is the sole determinant for who we are and will become, however studies have shown that strict genetic determinism is a flawed theory. Un microARN se joue de la frontière animal-végétal.

Les microARN, codés par des gènes distincts de ceux qu’ils régulent, s’associent aux ARN messagers et les empêchent d’être traduits en protéines.

Un microARN se joue de la frontière animal-végétal

Pour en savoir plus L. Zhang et al., Exogenous plant MIR168a specifically targets mammalian LDLRAP1 : evidence of cross-kingdom regulation by microRNA, Cell Research, prépublication en ligne, 2011. Voir aussi dans Pour la Science : N. L'auteur Loïc Mangin est rédacteur en chef adjoint à Pour la Science Quelle est la différence entre un animal et un végétal ?