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Sugar is bad for you, right? Everybody knows that. But it's very good for one thing--cancer cells. According to Science Magazine, cancer tissues have extra sugars that bind to the protein Siglec-9 on natural killer cells.
糖對身體有壞處，對嗎？人人都知道。但是它對一樣東西特別有利——癌細胞。根據(jù)《科學雜志》，癌組織上有與自然殺傷細胞蛋白樣凝集素9捆綁在一起的額外糖類。
In doing so, they quiet the immune response and make the body less able to fight off the deadly enemies. To our defense system, cell-surface sugars are a molecular fingerprint--and a type of Harry Potter-like invisibility cloak--telling a roving immune cell, "This one's OK. Move along." Certain pathogens, such as the bacteria that cause gonorrhea or streptococcal infections, have taken advantage. They coat themselves with sialic acids to hide from the immune system.
這樣它們就能平息免疫反應，讓身體無法對抗致命的癌組織。對防御系統(tǒng)而言，細胞表面的糖類就是分子指紋，它們像穿著一層隱身衣一樣，甄別移動的免疫細胞，“這個沒問題，繼續(xù)走。”有些病原體，比如導致淋病或鏈球菌感染的細菌正好利用了這一點。它們用唾液酸將自己包裹起來躲避免疫系統(tǒng)的偵查。
譯文屬可可英語原創(chuàng)，未經(jīng)允許，不得轉載。
