Um dos temas abordados nas nossas aulas de Biologia foi sobre a Epigenética. E o que é isto? perguntam vocês. Neste post vou explicar o que é isto da Epigenética e acredito que para quem ainda não sabe vai ficar um pouco admirado tal como eu fiquei.
Epigenética:
És uma pessoa stressada? És obeso/a? Fumas? A epigenética é uma ciência que explica que os nossos hábitos podem alterar o nosso DNA e por tabela causar distúrbios na nossa descendência.
Muitas vezes lamentamo-nos de não termos herdado a cor azul dos olhos da nossa mãe como também agradecemos muitas vezes de não sermos obesos como o nosso pai. Como sabemos, a informação do nosso DNA vem da mistura do DNA dos nossos progenitores aquando da fecundação, mas por incrível que pareça nós podemos herdar características que os nossos progenitores obtiveram em vida. Segundo a psiquiatra e professora da Escola de Medicina de Monte Sinai Rachel Yehuda nem pensava na palavra epigenética quando abriu em Nova York uma clínica para o tratamento de sobreviventes do Holocausto nazista, em 1992. Em pouco tempo, e para sua surpresa, ela notou que muitos dos filhos das vítimas, nascidos alguns anos depois do fim da Segunda Guerra Mundial, também apresentavam sintomas de stresse acima do comum, mesmo não tendo vivido pouco dos horrores vividos pelos seus pais.
Cientistas já notaram que crianças nascidas de mulheres que presenciaram o 11 de Setembro demonstram mais hipótese de desenvolver stresse. E que filhos de fumadores têm maior probabilidade de apresentar obesidade. Rachel Yehuda e Jonathan Seckl uniram-se, então, após os ataques terroristas de 11 de Setembro de 2001 para estudar as consequências do momento traumático nos filhos de mulheres que estavam grávidas na altura do ataque terrorista. Até agora, descobriram algo intrigante: as crianças apresentam um nível de cortisona (hormona ligada ao stresse) no sangue mais alto do que a média da população.
O que também pode mudar o nosso DNA é o meio ambiente que nos rodeia. Para perceberem melhor isto vou dar-vos um exemplo: Duas gémeas, que como sabemos tem os mesmos genes, chegam á fase adulta e decidem viver em meio ambientes diferentes, uma escolheu o campo e outra a cidade. Passado alguns anos nota-se que ambas já não são tão parecidas fisicamente pois o meio ambiente que frequentaram durante muitos anos mudou-lhes o DNA. No primeiro vídeo mais abaixo mostra que isto de pessoas que são geneticamente idênticas podem tornar-se muito diferentes devido ao meio ambiente que lhes rodeia.
Por detrás deste conceito, epigenética, pode estar a chave para descobrir a influência do ambiente e da nossa rotina na carga genética que passamos para a nossa descendência.
Este vídeo ajuda a perceber melhor o que é a Epigenética:
Com isto, podemos verificar que muitos episódios marcantes da nossa vida ou até mesmo hábitos da nossa rotina podem reflectir-se mais tarde nos nossos filhos e como tal, na minha opinião, devemos ter atenção aos nossos hábitos como por exemplo o sermos fumadores porque esta nossa “característica” que adquirimos na vida pode ser herdada para os nossos filhos e claro que nenhum pai quer que isso aconteça.
Admirados? Acreditem porque é verdade. Espero que este post seja útil para pessoas que desejam ter filhos mais tarde e que sirva de lição para aqueles que tem uma vida com muito stress pode prejudicar os nossos filhos.
Levem a vida com tranquilidade :) No stress :)
Levem a vida com tranquilidade :) No stress :)
in: http://revistagalileu.globo.com/Revista/Galileu/0,,EDG87034-7943-217,00-EPIGENETICA+A+CULPA+E+DOS+SEUS+PAIS.html
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One of the themes in our Biology class was about Epigenetics. And what is this? you ask. In this post I will explain what this is of Epigenetics and I believe for those who still do not know will be a little surprised as I was.
Epigenetics:
Are you a stressed out person? You are obese / a? Do you smoke? Epigenetics is the science that explains our habits can alter our DNA and wreak havoc on the table for our progeny.
Often we lament not the blue we inherited from our mother's eyes but also often do not appreciate being obese as our father. As we know, the information of our DNA comes from a mixture of DNA from our parents at the time of fertilization, but oddly enough we can inherit characteristics that our parents have earned in life. According to psychiatrist and professor at the School of Medicine, Mount Sinai Rachel Yehuda did not even think the word epigenetics in New York when he opened a clinic for the treatment of survivors of the Nazi Holocaust, in 1992. In a short time, and to her surprise, she noticed that many of the victims' children, born a few years after the end of World War II, also had symptoms of stress above the ordinary, despite not having lived some of the horrors experienced by their parents.
Scientists have noted that children born to women who witnessed the September 11th show more chance of developing stress. And that children of smokers have an increased likelihood of obesity. Rachel Yehuda and Jonathan Seckler joined, then, after the terrorist attacks of 11 September 2001 to study the consequences of the traumatic moment in offspring of women who were pregnant at the time of the terrorist attack. So far, they discovered something intriguing: children have a level of cortisol (a hormone linked to stress) in the blood higher than the average population.
What can also change our DNA is the environment that surrounds us. To better understand this I will give you an example: Two twins, which as we know has the same genes, will reach adulthood and decide to live in different environments, a chosen field and another city. After a few years it is noticed that both are not as physically similar as the environment for many years who attended changed their DNA. In the first video below shows it to people who are genetically identical can become very different due to the environment that surrounds them.
Behind this concept, epigenetic, may be the key to discovering the influence of environment and genetic background in our routine that we pass on to our offspring.
The videos helps to understand better what is Epigenetics (above, in portuguese post)
With this, we can see that many of the salient facts of our lives or even our daily habits can later be reflected in our children and as such, in my opinion, we should pay attention to our habits such as smoking be because this our "feature" that we acquire in life can be inherited for our children and of course no parent wants that to happen.
Admired? Believe it because it's true. I hope this post is useful for people who want to have children later and a lesson to those who have a life with too much stress can harm our children.
Take life with tranquility:) No stress:)
in: http://revistagalileu.globo.com/Revista/Galileu/0,,EDG87034-7943-217,00-EPIGENETICA+A+CULPA+E+DOS+SEUS+PAIS.html
----
One of the themes in our Biology class was about Epigenetics. And what is this? you ask. In this post I will explain what this is of Epigenetics and I believe for those who still do not know will be a little surprised as I was.
Epigenetics:
Are you a stressed out person? You are obese / a? Do you smoke? Epigenetics is the science that explains our habits can alter our DNA and wreak havoc on the table for our progeny.
Often we lament not the blue we inherited from our mother's eyes but also often do not appreciate being obese as our father. As we know, the information of our DNA comes from a mixture of DNA from our parents at the time of fertilization, but oddly enough we can inherit characteristics that our parents have earned in life. According to psychiatrist and professor at the School of Medicine, Mount Sinai Rachel Yehuda did not even think the word epigenetics in New York when he opened a clinic for the treatment of survivors of the Nazi Holocaust, in 1992. In a short time, and to her surprise, she noticed that many of the victims' children, born a few years after the end of World War II, also had symptoms of stress above the ordinary, despite not having lived some of the horrors experienced by their parents.
Scientists have noted that children born to women who witnessed the September 11th show more chance of developing stress. And that children of smokers have an increased likelihood of obesity. Rachel Yehuda and Jonathan Seckler joined, then, after the terrorist attacks of 11 September 2001 to study the consequences of the traumatic moment in offspring of women who were pregnant at the time of the terrorist attack. So far, they discovered something intriguing: children have a level of cortisol (a hormone linked to stress) in the blood higher than the average population.
What can also change our DNA is the environment that surrounds us. To better understand this I will give you an example: Two twins, which as we know has the same genes, will reach adulthood and decide to live in different environments, a chosen field and another city. After a few years it is noticed that both are not as physically similar as the environment for many years who attended changed their DNA. In the first video below shows it to people who are genetically identical can become very different due to the environment that surrounds them.
Behind this concept, epigenetic, may be the key to discovering the influence of environment and genetic background in our routine that we pass on to our offspring.
The videos helps to understand better what is Epigenetics (above, in portuguese post)
With this, we can see that many of the salient facts of our lives or even our daily habits can later be reflected in our children and as such, in my opinion, we should pay attention to our habits such as smoking be because this our "feature" that we acquire in life can be inherited for our children and of course no parent wants that to happen.
Admired? Believe it because it's true. I hope this post is useful for people who want to have children later and a lesson to those who have a life with too much stress can harm our children.
Take life with tranquility:) No stress:)
in: http://revistagalileu.globo.com/Revista/Galileu/0,,EDG87034-7943-217,00-EPIGENETICA+A+CULPA+E+DOS+SEUS+PAIS.html
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