首页
登录
职称英语
【B1】 [br] 【B7】 [originaltext] Scientists have developed a new cancer drug. So
【B1】 [br] 【B7】 [originaltext] Scientists have developed a new cancer drug. So
游客
2023-08-01
67
管理
问题
【B1】 [br] 【B7】
Scientists have developed a new cancer drug. So far, they have tested it only on laboratory animals. The drag is designed to invade and kill cancer cells but not healthy ceils.
First, the drag enters the cancer and destroys the supply of blood. Then it releases poison to destroy the cancer cells.
Researchers at the Massachusetts Institute of Technology in Cambridge carried out the study. The results appeared in Nature magazine. A school news release called the drug an "anti-cancer smart bomb."
Ram Sasisekharan is a professor at M.I.T. He says his team had to solve three problems. They had to find a way to destroy the blood vessels, then to prevent the growth of new ones. But they also needed the blood vessels to supply chemicals to destroy the cancer.
So, the researchers designed a two-part "nanocell". The cell is measured in nanometers, or one thousand millionth of a meter.The particle used was two hundred nanometers--much, much smaller than a human hair.
The scientists say it was small enough to pass through the blood vessels of the cancer, but it was too big to enter normal blood vessels. The surface of the nanocells also helped them to avoid natural defenses.
The scientists designed the cell as a balloon inside a balloon. They loaded the outer part with a drug that caused the blood vessels to fall in on themselves. That cut off the blood supply and trapped the nanocell inside the cancer. Then, the nanocell slowly released chemotherapy drags to kill the cancer cells.
The team says the treatment shrank the cancer and avoided healthy cells better than other treatments.
选项
答案
prevent
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2886673.html
相关试题推荐
【B1】[br]【B11】[originaltext]SomeofthenotebooksGeorgeWashingtonkepta
【B1】[br]【B10】[originaltext]SomeofthenotebooksGeorgeWashingtonkepta
【B1】[br]【B8】[originaltext]SomeofthenotebooksGeorgeWashingtonkeptas
【B1】[br]【B7】[originaltext]SomeofthenotebooksGeorgeWashingtonkeptas
【B1】[br]【B5】[originaltext]SomeofthenotebooksGeorgeWashingtonkeptas
【B1】[br]【B4】[originaltext]SomeofthenotebooksGeorgeWashingtonkeptas
[originaltext]That’showShownO’Neilllooksbackontheheartattackheex
[originaltext]That’showShownO’Neilllooksbackontheheartattackheex
[originaltext]NewresearchfromStatisticalResearchshowsthattheInterne
[originaltext]NewresearchfromStatisticalResearchshowsthattheInterne
随机试题
ThecultureoftheUnitedStatesisaWesterncultureoriginallyinfluencedb
Irecentlytookcareofa50-year-oldmanwhohadbeenadmittedtothehospita
当尿中尿胆原、尿胆素完全阴性时,应考虑A.肝细胞性黄疸 B.阻塞性黄疸 C.
常见鼻源性颅内并发症不包括A.海绵窦血栓性静脉炎 B.硬脑膜外脓肿 C.乙状
个人面对问题情境时能随机应变、触类旁通、想出不同类型的答案,表明具有较高的{
维生素B,可作为辅酶参与糖的代谢,并有保护神经系统的作用。该物质的结构式如图1所
某版高中必修教材“名著导读”共选10部中外名著,每册安排2部。导读内容包括“背景
下列有关基金推介材料业绩登载规范的表述,不正确的是()。A.基金宣传推介
4岁患儿,3天前突发高热,体温39.5℃,伴寒战,述右侧膝上部疼痛,患肢屈曲,拒
下列属于仲裁时效中断的法定事由的有()A:向对方当事人主张权利 B:对方
最新回复
(
0
)