久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現在的位置: > Language Tips > Audio & Video > Normal Speed News  
 





 
Gene therapy to treat Parkinson's disease
[ 2007-06-22 08:34 ]

U.S. researchers are using gene therapy to treat the neurological condition Parkinson's disease, and they say the results so far are promising. VOA's Jessica Berman reports.

Successful gene therapy to correct a host of devastating diseases has been elusive. But researchers may have gotten a step closer with a treatment for Parkinson's disease, the second most common neuro-degenerative condition after Alzheimer's disease.

Neurologist Michael Kaplitt at the Weill College Medicine at Cornell University in New York says Parkinson's limits the ability of patients to move, and the gene therapy helped them to move.

"The symptoms are tremors and stiffness, freezing, you know, muscle stiffness," he said. "So, when you put that all together as sort of a composite, we saw there was a significant improvement in these patients over time that lasted for the full one year of the study."

Kaplitt says there is a group of cells in the region of the brain that controls movement through production of a chemical called dopamine. In Parkinson's disease, Kaplitt says, the cells stop producing dopamine and the movement control center becomes hyperactive.

In the onset of the disease, Parkinson's symptoms can be quieted with drugs that replace dopamine. But as the disease progresses, the drugs make the symptoms worse. So, Kaplitt and colleagues decided to try to bypass the dopamine-producing cells to see if they could alter regulation of movement at a higher brain level.

Researchers developed a therapy in which they attached a modified gene to viral particles and infused the treatment into one side of the brain of 12 participants with varying degrees of Parkinson's symptoms.

The gene, called GABA, helps in the production of a chemical that has a calming effect over a wider area of the brain.

Kaplitt says investigators were hoping for lasting results.

"The idea was, with a single surgery at a single site, putting in this one gene there, that you would create a little factory that would essentially reestablish the normal neuro-chemical balance of a large part of this circuit to normalize the flow of information to the rest of the brain and thereby hopefully improve symptoms," he explained.

Kaplitt says it took three months for the therapy to kick in, but once it did, most patients showed significant improvement of their symptoms up to one year after the therapy. He says for some patients, the improvements were not as marked or did not last as long.

The study was completed in May 2006 and its results were published in the latest issue of The Lancet.

A larger trial is being planned.

elusive :difficult to define or describe(難以定義的;難以描述的)

點擊進入更多VOA常速

(來源:VOA  英語點津姍姍編輯

 
 
相關文章 Related Stories
 
Latest presidential polls show good news for Hillary
         
 
 
 
 
 
         

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  Climbers who reach top of world's highest mountain
  Democratic presidential contenders focus on Iraq
  《追夢女郎》(精講之二)
  Experts list warning signs of ovarian cancer
  Michelle Kwan visits Moscow orphanage

論壇熱貼

     
  The Force of Star Wars (e-c)practice
  在義與利之外(我的譯文)
  本人丑事來了--人生的第一次。
  How to say "網易網盤“?
  how to say "孩子是父母的翻版"?
  Let's Talk- What are you worrying?






主站蜘蛛池模板: 国产精品视频成人 | 国产a一级毛片午夜剧院 | 一本高清 | 俄罗斯一级黄色片 | 特黄a大片免费视频 | 美女被拍拍拍拍拍拍拍拍 | 深夜福利爽爽爽动态图 | 欧美日本高清视频在线观看 | 999久久久 | 老师张开腿让我捅 | 最新国产精品好看的国产精品 | 看片日韩 | 欧美一级视频在线观看 | 香蕉亚洲精品一区二区 | freese×video性欧美丝袜 | 九九热视频在线免费观看 | 国产成人女人在线视频观看 | 午夜美女网站 | 久久毛片网站 | 成人伊人| 成人爱做日本视频免费 | 成人免费看黄网址 | 欧美日韩中文国产一区二区三区 | 精品国产91久久久久久久a | 成人免费一级片 | 久久国产精品岛国搬运工 | 国产高清一区二区三区免费视频 | 美国毛片在线观看 | 日本一级高清片免费 | 国产成人高清精品免费观看 | 亚洲国产欧洲综合997久久 | 亚洲一区二区三区高清视频 | 国产女王女m视频vk 国产女王丨vk | 国产精品国产精品国产三级普 | 国产成人黄网在线免 | 高清性色生活片欧美在线 | 极品丝袜高跟91白沙发在线 | 久久美女精品国产精品亚洲 | 亚洲欧美视频一区二区 | 中文字幕在线观看国产 | 久久国产精品久久久 |