主题:我国部分地区大老鼠绝迹 被指与转基因玉米有关 -- 破鱼
The New 'Epigenetics:' Poor Nutrition In The Womb Causes Permanent Genetic Changes In Offspring
As a result of this genetic adaptation, the rats were likely to grow to smaller sizes than their normal counterparts. At the same time, they were also at higher risk for a host of health problems throughout their lives, such as diabetes, growth retardation, cardiovascular disease, obesity, and neurodevelopmental delays, among others. Although the study involved rats, the genes and cellular mechanisms involved are the same as those in humans.
The scientists made this discovery through experiments involving two groups of rats. The first group was normal. The second group had the delivery of nutrients from their mothers' placentas restricted in a way that is equivalent to preeclampsia. The rats were examined right after birth and again at 21 days (21 days is essentially a preadolescent rat) to measure the amount of a protein, called IGF-1, that promotes normal development and growth in rats and humans. They found that the lack of nutrients caused the gene responsible for IGF-1 to significantly reduce the amount of IGF-1 produced in the body before and after birth.
一言以蔽之,如果老鼠在胚胎发育时期营养不良,其出生后基因会发生永久性改变,使其体型变小。
哈佛医学院十月六日有关于epigenetics的免费讲座:October 6 You Are What Your Mother Ate: The New Science of Epigenetic
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🙂我国部分地区大老鼠绝迹 被指与转基因玉米有关 2 破鱼 字980 2010-09-21 07:13:48
🙂二十多年前我们那里就不见大老鼠了,用得着你来马后炮 汽车零部件 字0 2010-09-23 17:53:32
🙂老鼠变小了的一个可能解释与epigenetics
🙂据说美国人爱吃转基因,20年之后看看实验结果 子玉 字109 2010-09-23 15:21:00
🙂应该是"美国人被爱吃转基因"。 10 厚积薄发 字2640 2010-09-23 17:49:42
🙂在这个话题上,还看2000年的文章,你会被误导的。 7 Ambrossi 字269 2010-09-23 19:36:52
😨你是对的。我犯错误了,没有注意看文章时间。 3 厚积薄发 字359 2010-09-23 19:54:33
🙂在美国基本没希望 2 Ambrossi 字456 2010-09-24 10:01:49