首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
At 18, Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th centu
At 18, Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th centu
admin
2014-01-27
23
问题
At 18, Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. Bom with an extremely rare and usually fatal disorder that left her without a functioning immune system(the "bubble-boy disease" , named after an earlier victim who was kept alive for years in a sterile plastic tent), she was treated beginning in 1990 with a revolutionary new therapy that sought to correct the defect at its very source, in the genes of her white blood cells. It worked. Although her last gene-therapy treatment was in 1992, she is completely healthy with normal immune function, according to one of the doctors who treated her, W. French Anderson of the University of Southern California. Researchers have long dreamed of treating diseases from hemophilia to cancer by replacing mutant genes with normal ones. And the dreaming may continue for decades more. "There will be a gene-based treatment for essentially every disease, " Anderson says, "within 50 years. "
It’ s not entirely clear why medicine has been so slow to build on Anderson’ s early success. The National Institutes of Health budget office estimates it will spend $ 432 million on gene-therapy research in 2005, and there is no shortage of promising leads. The therapeutic genes are usually delivered through viruses that don’t cause human disease. "The virus is sort of like a Trojan horse, " says Ronald Crystal of New York Presbyterian/Weill Cornell Medical College. "The cargo is the gene.
At the University of Pennsylvania’ s Abramson Cancer Center, immunologist Carl June recently treated HIV patients with a gene intended to help their cells resist the infection. At Cornell University, researchers are pursuing gene-based therapies for Parkinson’ s disease and a rare hereditary disorder that destroys children’ s brain cells. At Stanford University and the Children’ s Hospital of Philadelphia, researchers are trying to figure out how to help patients with hemophilia who today must inject themselves with expensive clotting drugs for life. Animal experiments have shown great promise.
But somehow, things get lost in the translation from laboratory to patient. In human trials of the hemophilia treatment, patients show a response at first, but it fades over time. And the field has still not recovered from the setback it suffered in 1999, when Jesse Gelsinger, an 18-year-old with a rare metabolic disorder, died after receiving an experimental gene therapy at the University of Pennsylvania. Some experts worry that the field will be tarnished further if the next people to benefit are not patients but athletes seeking an edge. This summer, researchers at the Salk Institute in San Diego said they had created a "marathon mouse" by implanting a gene that enhances running a-bility; already, officials at the World Anti-Doping Agency are preparing to test athletes for signs of "gene doping". But the principle is the same, whether you’ re trying to help a healthy runner run faster or allow a muscular-dystrophy patient to walk. "Everybody recognizes that gene therapy is a very good idea, " says Crystal. "And eventually it’ s going to work.
From the text we can see that the author seems______.
选项
A、optimistic
B、pessimistic
C、troubled
D、uncertain
答案
A
解析
作者的态度从文章第一句话和最后一句话就可以明显判断出来。第一句话说基因疗法是20世纪的伟大成就之一,最后一句话说“Everybody recognizes that gene therapy is a very goodidea”,由此可见作者对基因疗法持积极乐观的态度。因此正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/gVXd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
______iswillingtospendalottofollowfashiondesign?______willprobablybeamongthemostbeautifulpeopleforalongt
Whatdidthespeakertalkaboutlasttime?
Howdidthestudyevaluateeveryparticipant’ssenseofresponsibility?WhichoneofthefollowingisNOTtrueaboutRobertWil
Howmanylanguagesareusedthroughouttheworldtoday?
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
What’stheaverageannualincreaseofforeignstudentpopulationintheperiodbetween1985and1990intermsofpercentage?
Themanbehindthisnotion,JackMaple,isadandywhoaffectsdarkglasses,homburgs(翘边)andtwo-toeshoes;yethehasbecome
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
Duringtheperiod1490—1979themainprogressmentionedinthispassagewasSiebes’inventionwasnotaperfectone,because
随机试题
.拔除胸膜腔闭式引流管时,应嘱病人()。
患者李某,女性,30岁。咯血反复发作一个月,血色鲜红,咳呛气急,痰少质黏色黄,午后潮热,五心烦热,盗汗,口干多饮,颧红,消瘦,月经不调。舌红绛少津液,苔薄黄,脉细数。其治疗应首选的方剂是
某市旧城改造需对某沿街房屋进行拆迁,拆迁人依法取得了房屋拆迁许可证,房地产管理部门公示了有资质的拆迁估价机构名单。某被拆迁人见到公示名单后,前往其中一家估价机构咨询,假如你作为该估价机构的一名房地产估价师,在接待该被拆迁入过程中了解到其房屋原为私有住房并于
Asthejobmarketradicallychangesinlinewiththepaceoftechnologicalchange,sotoomustthewaywetrainandupskill.Mee
一位教师兴致勃勃地走进教室,突然发现黑板上画了一幅自己的画像,引起课堂上一阵骚动。下列处理方式,最恰当的一项是()。
南北双方高级领导人的对话始于______。
调制解调器(Modem)的作用是( )。
Peopletodayarestilltalkingaboutthegenerationgap.Someparentscomplainthattheirchildrendonotshowthemproperrespe
Onnoaccount______toanyonewhoworksinthecompany.
Youngpeopletendtobecriticaloftheirparentsattimesandblamethemformostofthemisunderstandingsbetweenthem.Ithin
最新回复
(
0
)