Genetically modified cows make low allergy milk 基因改造牛製造低過敏牛奶

Tue, Dec 04, 2012 - Page 10

A genetically modified cow that produces milk less likely to cause allergic reactions has been engineered by New Zealand scientists. Up to three percent of infants are allergic to cows’ milk in their first year of life.

The modified cow produced milk without beta-lactoglobulin — a whey protein to which some people are allergic. The study has been labeled a “milestone” by one scientist, but some campaign groups say it raises ethical concerns.

The instructions for making the beta-lactoglobulin protein are contained in genes in the cow’s DNA. The scientists added extra genetic material to disrupt the manufacturing process using a technique called RNA interference.

Writing in the journal Proceedings of the National Academy of Sciences, the researchers said, “All milk samples from the transgenic calf were devoid of any detectable beta-lactoglobulin.”

(Liberty Times)

一種乳汁比較不會造成過敏反應的基因改造乳牛,已經被紐西蘭科學家以基因工程技術製造出來。多達百分之三的嬰兒在出生第一年會對牛乳過敏。

這種基改牛的牛乳沒有β乳球蛋白,一種會讓一些人過敏的乳清蛋白質。一名科學家認為這是「里程碑」的研究,但部份倡議團體認為,此項研究會引發道德關切。

製造β乳球蛋白的指令包含在乳牛DNA的基因裡。科學家利用核醣核酸(RNA)干擾技術添加額外的基因材料干擾製造過程。

研究人員在《國家科學院院刊》撰文指出:「改造基因的小牛所有乳汁樣本都缺少偵測得到的β乳球蛋白。」

(自由時報/翻譯:自由時報國際新聞中心)