日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Global EditionASIA 中文雙語Fran?ais
Lifestyle
Home / Lifestyle / Health

Chinese scientists make nano 'Trojan horse' to strangle tumors

Xinhua | Updated: 2018-08-09 11:08
Share
Share - WeChat

Chinese scientists have folded DNA molecules in an origami-like process to make a nano "Trojan horse", which is thinner than 1/4000 of a hair and can release "killers" to fight cancer tumors.

Cancer cells need a lot of nutrition to multiply, but they don't produce nutrient substances, said lead researcher Nie Guangjun, of China's National Center for Nanoscience and Technology (NCNST).

All the blood, oxygen and energy are conveyed to cancer cells through blood vessels, so many scientists are trying to create blocks on the blood vessels feeding tumors.

Through precision control, researcher Ding Baoquan folded a single-strand DNA of a phage (a type of virus) into a rectangular sheet. Then he put four "killers" -- molecules of thrombin (a clotting enzyme in blood plasma) -- on the sheet and rolled them up.

At the interface, "locks" made by fragments of nucleolin protein DNA were installed, forming a tube-shaped nano "Trojan horse" or nanorobot, which is 90 nanometers long and has a diameter of 19 nanometers.

After injection, the "Trojan horse" travels in blood vessels and only tumors have the "key" to open the "locks." Once unlocked, the killer thrombin molecules are released, attracting platelets and fibrinogen protein to form a large thrombus, or clot, in the blood vessel within hours to cut off the blood supply and "starve" the tumor to death, Nie said.

The nanorobot can be cleared out of the body after it has finished its task.

Researchers have conducted controlled experiments on more than 200 mice with melanoma, breast cancer, ovarian cancer and primary lung cancer, and found the nanorobots are effective in strangling the tumors, Nie said.

In one experiment on eight mice with melanoma, the tumors in three mice totally disappeared. The average survival life of the mice was prolonged from 20.5 days to 45 days. No metastasis was found, according to Nie.

Most Popular
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 女人一级毛片免费视频观看 | 国产在线一区二区三区 | 香蕉国产在线观看免费 | 天天干天天草 | 日韩精品成人 | 色噜噜色噜噜天天拍一拍 | 日本一二区视频 | 狠狠五月 | 丁香婷婷色综合亚洲小说 | 日韩手机专区 | 久久精品免费网站 | 91操美女 | 久久综合久久久久 | 五月婷婷久久草丁香 | 国产精品久久久久久久久久久久 | 操美女在线 | 精品九九视频 | 香蕉国产人午夜视频在线 | 欧美精品黄页在线观看大全 | 精品一区二区三区水蜜桃 | 成人欧美一区二区三区在线播放 | 人人模人人干 | 91久久极品| 国产成人免费视频网站视频社区 | aaaaa国产毛片 | 中文字幕亚洲一区 | 一区二区三区四区在线 | 中文字幕日本亚洲欧美不卡 | 精品免费国产一区二区三区四区 | 精品视频网站 | 天天摸天天添 | 那里有毛片看 | 久久久伊人色综合A片无码 国产精品区一区二区三 | 日韩三级网| 2021国产精品一区二区在线 | 韩国成人毛片aaa黄 人人天天操 | 欧美成人三级一区二区在线观看 | 久久人人精品 | 欧美成人xxxx | 日韩色小说| 国产福利不卡 |