 |
Fitnes - powerlifting forum
fitnes, prehrana, treningi
|
| Poglej prejšnjo temo :: Poglej naslednjo temo |
| Avtor |
Sporočilo |
Mitch
Administrator foruma
Pridružen/-a: 11.09. 2008, 06:27
Prispevkov: 2136
Kraj: Nova Gorica
|
 Objavljeno: 23 Sep 2012 09:08 Naslov sporočila: Prehrana med nosečnostjo vpliva na dojenčkovo debelost |
 |
|
Če imaste prekomerno telesno težo in ste noseče, ni nujno usojeno da bo vaš otrok debel, glede na vse več napravljenih študij.
Skupina znanstvenikov iz ZDA so dokazali, da spreminjanje vnosa maščob v času nosečnosti na zmerni ravni je dovolj, da koristi otroku, ne glede na telesno teže matere. Natančneje, so ugotovili, da beljakovine, imenovane "SIRT1" preoblikuje razvijajoči se zarodek "histona kodo, ki vpliva na njegovo" epigenetsko verjetnost ", da so prekomerno težki ali debeli skozi njegovo življenjsko dobo.
"We are finding that the cycle of obesity likely begins in the womb, however, we are also finding that obesity does not necessarily beget obesity," said Kjersti M. Aagaard, M.D., Ph.D., study author from the Division of Maternal-Fetal Medicine and the Department of Obstetrics and Gynecology at Baylor College of Medicine in Houston, Texas. "A diet laden with fat changes the molecular machinery which chemically modifies the structure of the developing infant's genetic material. These commonly called 'histone code' changes are rewritten-at least in part-by SIRT1, which in turn, alters key regulators of fat and glucose metabolism in the infant. It is our hope that these early steps will in turn break the cycle of obesity in the generations to come."
To make this discovery, Aagaard and colleagues used three groups of pregnant primates. The first group ate a healthy pregnancy diet (13 percent fat), while the second group ate a high fat diet (35 percent fat) and became obese. The third group was kept on a high fat diet for several years, became obese, and then was put on a healthy diet. Researchers were able to tease apart the effects on the infant of being exposed during pregnancy to a healthy diet versus an unhealthy high fat diet. The sirtuins and the proteins, and the genes regulating glucose and fat metabolism were analyzed. Results suggest that the livers of infants exposed to the high fat diet, showed less SIRT1 and less sirtuin activity than in the control group. However, infants exposed to a healthy pregnancy diet in both lean and obese groups had restored sirtuin. To prove that SIRT1 was specifically chemically modifying the histone code, scientists created a dead enzyme version. Using high level mass spectrometry, it was discovered that while the live enzyme version of SIRT1 was very good at chemically modifying histone proteins (specifically "deacetylating" histone protein H3) the dead version was not.
"What this study shows once again is that eating a healthy diet while pregnant holds true, regardless of your size or shape," said Gerald Weissmann, M.D., Editor-in-Chief of The FASEB Journal. "Even if a woman isn't eating well before pregnancy, adopting good eating habits during pregnancy is still very good for the child and for her. This new report shows how diet affects offspring at the molecular level and points to new treatments for overweight people who were not fortunate enough to have mothers who ate well during pregnancy."
Vir: Federation of American Societies for Experimental Biology (2012, September 17 ). Eating well during pregnancy reduces baby's obesity risk regardless of mom's size. ScienceDaily.
_________________
Spletna stran:
http://mitjahumar.synthasite.com/
E-mail: triatlon.moci@gmail.com |
|
| Nazaj na vrh |
|
 |
|
|
Ne, ne moreš dodajati novih tem v tem forumu
Ne, ne moreš odgovarjati na teme v tem forumu
Ne, ne moreš urejati svojih prispevkov v tem forumu
Ne, ne moreš brisati svojih prispevkov v tem forumu
Ne ne moreš glasovati v anketi v tem forumu
|
|
Pogosta vprašanja
Išči
Seznam članov
Skupine uporabnikov
RSS Feed
Registriraj se
Tvoj profil
Zasebna sporočila
Prijava
