In the early seventies , interferon , a drug that had been developed from a protein released by white blood cells during a viral infection , was widely thought to be a possible cure for cancer ; in 1980 , it appeared on the cover oftime .
These offer a big improvement over treatment based on injected interferon .
相比基于注射干扰素的治疗,这是一个很大的进步。
But in patients interferon failed to cure solid tumors , and melanoma responded only occasionally .
但是,在给患者使用时,干扰素未能治愈实性肿瘤,并且对黑素瘤只是偶尔起效。
It prefers to infect cancer cells because they turn off the antiviral protein interferon and turn on signalling molecules that attractvaccinia .
疫苗偏向传染癌细胞,因为它能关掉蛋白质干扰素的活动,打开发信号的细胞,以吸引牛痘。
Experiments showed interferon gamma , an immune protein secreted by lymphocytes , was responsible for activating b7-h1 , allowing tumors to escape immune-system attack .