English 中文網 漫畫網 愛新聞iNews 翻譯論壇
    中國網站品牌欄目(頻道)
    當前位置: Language Tips > Normal Speed News VOA常速

    Nanostructure promotes blood vessel growth

    [ 2011-08-08 14:59]     字號 [] [] []  
    免費訂閱30天China Daily雙語新聞手機報:移動用戶編輯短信CD至106580009009

    US researchers have developed a new way to promote the growth of blood vessels. It potentially could improve treatment in diabetes, organ transplants, stroke, and heart attack.

    The veins and arteries that snake through the body are something like a highway network, a pathway to transport oxygen and other nutrients to cells.

    When blood vessels get blocked, the tissue being supplied can die. That's what happens in a heart attack, for example: a blocked artery leads to death of heart muscle cells.

    Scientists have been trying to harness the body's own mechanism for growing blood vessels, but researcher Samuel Stupp of Northwestern University in Chicago explains they want to improve on nature.

    "So we want to imitate what the body naturally does, but we want to be able to do it on demand, exactly in the place where it's needed in, and we want the blood vessels to grow rapidly."

    The body naturally tells, or signals cells to start growing new blood vessels with a protein called VEGF (vascular endothelial growth factor), but studies have found that treating patients with VEGF is very expensive, the effect doesn't last long, and the blood vessels grow slowly.

    So Stupp and his colleagues designed a tiny molecular structure covered with peptides that mimic the signaling function of the body's own VEGF.

    "So they can be injected in tissue, and they can then signal cells directly and have a therapeutic effect." The therapeutic effect is the growth of new blood vessels.

    Stupp and team used laboratory mice to test the concept. The researchers cut out a piece of artery from the animals' legs to simulate the loss of circulation often faced by people with diabetes. "And we observed that circulation was restored within three to four weeks."

    Human trials are still in the future, but Stupp says in theory this new treatment would help in a number of medical scenarios, such as a heart attack - when a blood clot cuts off the heart's own blood supply.

    "So if you had a therapy that you could introduce into the heart muscle, you could jump-start the growth of blood vessels and possibly save more of the heart muscle that has been affected by the heart attack." Samuel Stupp of Northwest University and his colleagues described the research in the proceedings of National Academy of Sciences.

    That's today's health brief.

    diabetes: a polygenic disease characterized by abnormally high glucose levels in the blood 糖尿病

    stroke: a polygenic disease characterized by abnormally high glucose levels in the blood 中風

    heart attact: a sudden severe instance of abnormal heart function 心臟病發作

    VEGF: vascular endothelial growth factor 血管內皮生長因子

    peptides: 多肽類,縮氨酸

    therapeutic: tending to cure or restore to health 治療的,有益于健康的

    jump-start: start or re-start vigorously 啟動,發動

    Related stories:

    Brains gain from physical activity by older people

    A study looks at environmental influences on children

    What people with asthma can do to keep it under control

    No need to go to extremes to lose weight

    (來源:VOA 編輯:實習生史莉萍)

     
    中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
     

    關注和訂閱

    人氣排行

    翻譯服務

    中國日報網翻譯工作室

    我們提供:媒體、文化、財經法律等專業領域的中英互譯服務
    電話:010-84883468
    郵件:translate@chinadaily.com.cn
     
     
    无码国产精成人午夜视频一区二区 | 日韩中文字幕一区| 亚洲AV无码一区东京热久久 | 中文字幕手机在线视频| 67194成l人在线观看线路无码| 日日日日做夜夜夜夜无码| 最近中文字幕大全免费版在线 | 中文有无人妻vs无码人妻激烈 | 久久精品中文字幕无码绿巨人 | 最近中文字幕在线中文高清版| 精品成在人线AV无码免费看| 韩国19禁无遮挡啪啪无码网站| 三级理论中文字幕在线播放| 人妻少妇精品无码专区动漫| 久久ZYZ资源站无码中文动漫| 日韩精品无码人成视频手机 | 最近免费字幕中文大全视频| 在线观看免费无码视频| 本免费AV无码专区一区| 色噜噜综合亚洲av中文无码| 自慰无码一区二区三区| 中文字幕在线无码一区| 精品亚洲欧美中文字幕在线看| 亚洲精品无码鲁网中文电影| 亚洲一级Av无码毛片久久精品| 国产麻豆天美果冻无码视频| 久久精品无码午夜福利理论片| 曰韩精品无码一区二区三区 | 中文无码vs无码人妻| 乱人伦人妻中文字幕无码| 日本久久中文字幕| 最近中文字幕免费大全| 最好看的电影2019中文字幕 | 永久免费AV无码网站国产| 中文无码熟妇人妻AV在线| 少妇中文无码高清| 国产品无码一区二区三区在线| 久久无码高潮喷水| 亚洲人成人无码网www电影首页| 亚洲国产精品无码久久SM| 无码精品人妻一区二区三区中|