一个令人惊奇的发现是怀孕也有保护效应，因为许多表明保护作用的激素和生长因子信号基因也有表达。
A surprising finding was evidence of a protective effect of pregnancy as well, since the expression of many hormone and growth factor signaling genes suggests protection.
奶牛和人一样，也能在生长激素的作用下分泌类胰岛素生长因子，这种蛋白质被释放到血液里，从而进入到牛奶中。
Cows, like humans, produce insulin-like growth factor in response to growth hormones and release it into the blood, and the protein makes its way into their milk.
促性腺激素分泌的增加被看作是血浆中胰岛素和胰岛素类似生长因子- 1 (IGF - 1)的水平调节所致。
The increase in gonadotrophin secretion is thought to be mediated through plasma levels of insulin and insulin-like growth factor-1 (IGF-1).
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