Clearly, something in milk disables HIV. Previous experiments had identified proteins thatdo this to a certain extent, but nowhere near enough to explain all the data. Those earliersearches must therefore have missed something crucial. Dr Fouda, as she describes in theProceedings of the National Academy of Sciences, set out to find what it was.
很明显,母乳中的某种物质会阻止艾滋病病毒。先前的实验确定了蛋白质能在一定程度上阻止艾滋病病毒,但是不足以解释所有的数据。那么,先前的研究肯定错过了一些关键的东西。富达博士在美国国家科学院院刊上表示她试图发现错过的东西。
Milk is a complex mixture of chemicals, so her problem was how to isolate one of themwithout knowing in advance which was responsible. That meant running raw milk through aseries of processes, each of which divided it into smaller and smaller fractions, and testingeach fraction for its HIV-neutralising quality on the way. That quality, it turns out, isconcentrated in a single protein called tenascin-C. Further experiments showed that thisprotein disables HIV by locking onto a protein on the viruss surface, and that it is aseffective at doing so as antibodies generated by the immune system for that specificpurpose.
牛奶是一种复杂的混合物,因此问题在于在事先不知道的情况下如何找出它们中起作用的那种物质。这意味着将生牛奶通过一系列过程,每次将生牛奶分成更小的成分,测试每个成分对艾滋病病毒的作用。使艾滋病病毒无效的特性属于一种被称作黏蛋白C的蛋白质。更进一步的实验表明这种蛋白质通过附着在病毒表面的一种蛋白质上而阻止艾滋病病毒,效果跟免疫系统产生的抗体一样。
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