13 mai 2017

Nouvelle cause possible de l'autisme?

Quelle troublante possibilité:

Children whose maternal grandmother smoked during pregnancy are more likely to be diagnosed with autism, a study of UK children has found. There's an even greater discrepancy in the proportion of girls who show certain autism-like traits. 

(...) In a sample of 14,500 children born in the 1990s, children whose grandmother smoked while pregnant with the child's mother were 53 percent more likely to be diagnosed with autism spectrum disorder (ASD) than those whose grandmothers did not. The effect, published in Scientific Reports, was stronger with granddaughters than grandsons, and, after controlling for other factors, girls were 67 percent more likely to have poor social communication skills and repetitive behaviors if their grandmother smoked.

“In terms of mechanisms, there are two broad possibilities. There is DNA damage that is transmitted to the grandchildren or there is some adaptive response to the smoking that leaves the grandchild more vulnerable to ASD,” Pembrey said in a statement. “More specifically, we know smoking can damage the DNA of mitochondria – the numerous "power-packs" contained in every cell, and mitochondria are only transmitted to the next generation via the mother's egg. The initial mitochondrial DNA mutations often have no overt effect in the mother herself, but the impact can increase when transmitted to her own children.”




4 commentaires:

fylouz a dit…

Ceci est clairement de la propagande du patriarcat, peut-être même du "patriarcat capitaliste".

Prof Solitaire a dit…

Ah! Les salopards! ;-)

Mais sérieusement, ça me questionne énormément parce que ma mère fume depuis toujours et mon fils est autiste... je ne peux pas m'empêcher de me demander s'il pourrait y avoir un lien...

Et une raison de plus d'en vouloir à la vieille pimbêche...

Alex a dit…

Console-toi, même si c'était prouvé définitivement cela ne pourrait venir de ta mère dans ton cas puisque
"...mitochondria are only transmitted to the next generation via the mother's egg"
Donc, puisque tu est mâle tu pourrais blâmer ta belle-mère mais pas ta mère.

Prof Solitaire a dit…

Ouais, c'est du moins ce que révèlent les recherches pour l'instant...

Mais ne m'empêche pas de blâmer ma mère, c'est un de mes passe-temps favoris! ;-)