科學(xué)60秒:肚子里的“情緒”
來源：滬江聽寫酷
2011-08-14 10:00
Your [--1--] is home to about a trillion bacteria. And they pay rent. They protect you from infection, they [--2--] energy for you from what you eat and, if researchers are right, they affect your mental health as well. Because a new study shows that the bacteria that live in your intestines can influence your emotions and behavior. The work appears in the journal Gastroenterology. [Premysl Bercik et al, The Intestinal Microbiota Affect Central Levels of Brain-Derived Neurotropic Factor and Behavior in Mice]
Scientists found that treating adult mice with oral antibiotics not only messed with the balance of bugs in their bellies, but it changed their brain chemistry and behavior. The normally [--3--] became less cautious and less anxious, perhaps because the gut bacteria influenced a boost in a protein that promotes neural growth. And taking the mice off the drug restored their original [--4--] balance and behavior.
To confirm that the bacteria themselves were responsible, the scientists took mice that were raised in germ-free cages, animals that also happened to be naturally passive, and fed them bacteria from mice that were more active and daring. Sure enough, the newly infected mice grew more energetic and bold. So if you react to someone in a hostile way, you might [--5--] be giving them a bellyful.
【視聽版科學(xué)小組榮譽出品】
Scientists found that treating adult mice with oral antibiotics not only messed with the balance of bugs in their bellies, but it changed their brain chemistry and behavior. The normally [--3--] became less cautious and less anxious, perhaps because the gut bacteria influenced a boost in a protein that promotes neural growth. And taking the mice off the drug restored their original [--4--] balance and behavior.
To confirm that the bacteria themselves were responsible, the scientists took mice that were raised in germ-free cages, animals that also happened to be naturally passive, and fed them bacteria from mice that were more active and daring. Sure enough, the newly infected mice grew more energetic and bold. So if you react to someone in a hostile way, you might [--5--] be giving them a bellyful.
【視聽版科學(xué)小組榮譽出品】
digestive tract
harvest
timid creatures
intestinal
literally
肚子里的“情緒”
我們的消化腸道中居住著無數(shù)細(xì)菌。當(dāng)然，它們不是無償居住，它們從我們吃的食物中獲取能量，保護(hù)我們不受感染。如果研究人員猜測正確，它們同時還影響著我們的心理健康。一項新的研究顯示，住在我們腸道中的細(xì)菌可以影響到我們的情緒和行為。此研究結(jié)果發(fā)布在《腸胃病學(xué)》期刊上。[Premysl Bercik 等，腸道微生物影響小鼠腦源性神經(jīng)中樞因素與行為]
科學(xué)家發(fā)現(xiàn)，用口服抗生素治療成年老鼠不僅打亂了小鼠腹內(nèi)微生物平衡，還改變了它們的大腦化學(xué)物質(zhì)和行為。可能因為腸道細(xì)菌極大的影響了促進(jìn)神經(jīng)系統(tǒng)生長的蛋白質(zhì)，原本膽小的小老鼠變得大大咧咧，也沒那么躁動不安了。停用藥物后，小鼠就恢復(fù)了它們原本的腸道平衡和行為表現(xiàn)。
為確認(rèn)是細(xì)菌本身產(chǎn)生的作用，科學(xué)家將一些天性消極的小鼠放到無菌籠中飼養(yǎng)，并喂養(yǎng)它們活躍大膽的小鼠身上的細(xì)菌。于是，這些新近被感染的小鼠變得更加活躍和強壯。所以，如果你討厭某人，你可能就真的應(yīng)驗了那句“一肚子的意見”。
