Negative or positive experiences can alter the DNA of newborns during their first six months of life, according to a new study. Explanations.
The experiment is about mice but opens incredible perspectives for understanding the development of the human species. American researchers have just shown that cuddling or not his newborn could change his DNA, and during the first six months of weaning, the term "cuddling" covering all the physical and psychological care that it is possible to bring to an infant.
As explained in the new study published in Science, the infant's DNA is permeable to variations in its environment. If we already knew that the 25,000 genes that constitute it can activate or deactivate depending on external stimuli, it was totally unknown that they could also change order, distribution and number depending on the treatment received.
For two weeks, American researchers (Tracy A. Bedrosian, Carolina Quayle, Nicole Novaresi and Fred H. Gage) observed two groups of female mice accompanied by their young. The first group consisted of caring mums, giving care and grooming to their offspring, while the second group consisted of a mouse mum abandoning their baby.
Focusing on the brain cells of newborns, the researchers found that the DNA of baby mice that received more attention from their mothers was stable, while the DNA of neglected mice was changing. In the latter, certain genes duplicated and appeared several times in succession in the DNA structure, according to a process called "retrotransposition".
Specifically, retrotransposition, according to US researchers, gave birth to adult mice that were more stressed and less adapted to their environment than mice that did not undergo DNA modification during their first months of life.
Transposed on the human level, this discovery opens important perspectives concerning research on all neurological or psychiatric diseases, such as depression or schizophrenia. They could find their origin in the first six months of life. "Not to mention that the discovery opens the possibility of attacking these pathologies by biochemical treatments aimed directly at the mechanism of retro-transposition of the jumping genes", specifies Science and Life.
To find out more: "How epigenetics will change our lives", a program broadcast by the VYV Frequency Medical channel.
The guest is Professor Joel de Rosnay. We do not know where to begin his biography. From the Institut Pasteur to MIT ... We will summarize by saying that he is a major figure of science in our country; and the author of many bestsellers, the last of which has just been released: "The Symphony of the Living". Poetic title, but subtitled: "How epigenetics will change your life!" With epigenetics, medicine is entering a new dimension. It proves that our daily behavior (diet, stress, exercise, lifestyle ...) inhibits or activates some of our genes.
Is the world freeing itself from the genetic shackles and harming the Darwinian world? Our evolution is also done by small touches, at the scale of a life; and above all, these changes are transmitted. Which also means that the genetic "fatality" is gone and that we are all the conductors of our life, our changes and our balance. Joel de Rosnay goes even further by imagining a world of tomorrow that moves from a representative democracy to a participatory democracy ... A program that is both practical and practical, because there are many examples, and that will give pause.
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