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
2022-08-25
51
问题
At 18, Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. Born 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 ability; already, officials at the World Anti-Doping Agency arc 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
根据文章第一段第一句话“At 18, Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. ”可知,基因疗法是20世纪的伟大智力成就之一以及根据最后一段最后一句话“‘Everybody recognizes that gene therapy is a very good idea, ’ says Crystal, ‘And eventually it’s going to work’”即“大家都知道基因疗法是个非常好的想法,”克里斯托尔说道,“基因疗法最终会有用的。”可知,作者对基因疗法持积极乐观的态度。因此选A。
转载请注明原文地址:https://kaotiyun.com/show/Q2Pd777K
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
______tellsusthatthegovernmentwillgivesupporttoemployers,whoofferpart-timejobs?______statesthatariseinoutp
PresidentKennedydied______yearsbeforethedaythespeechwasmade.
______airandmarinetransportationhasgreatlyexpandedbutisunderstricterinternationalregulation?______povertyamong
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,(31)tothefirs
ConfucianismhasitsgreatesteffectamongEuropeancountriesin______.Confuciushasbeengivenathoroughstudyandreviewfo
Travellingcompanionsareadisadvantage,accordingtothewriter,becausethey______.Hismainconcernintheeveningswasto
Accordingtothepassage,AmericanscanaccepteverythingEXCEPTthat______.
ThoughPaulisdisabled,hemanagedtomovearoundinthehouse.
Psychologiststakecontrastiveviewsofhowexternalrewards,from【C1】______praisetocoldcash,affectmotivationandcreativity.
Culturalglobalization,formany,meansWesternizationorAmericanization.Animportantdistinctionconcerningtoday’scultural
随机试题
汽车运输效率的高低在很大程度上取决于汽车的_______。
在新的历史条件下,致力于中华民族的伟大复兴,必须
“两个凡是”不符合马克思主义。
铸造牙合支托的颊舌径宽度在磨牙为磨牙颊舌径宽度的
女,62岁,高血压病病史8年,最高血压180/100mmHg,糖尿病病史5年。实验室检查:血肌酐82μmol/L,该患者正确的诊断是()
A.丙酸倍氯米松B.沙美特罗C.异丙托溴铵D.扎鲁司特E.茶碱分子内有甾体结构的是()。
同一材料在进行强度试验时,加荷速度快者较加荷速度慢者的试验结果值偏大。( )
CEPA
Whatdoesthewomanhavetodo?
TheParthenonwasachurchfrom1204until1456,whenAthenswastakenbyGeneralMuhammedtheConqueror,theTurkishsultan,wh
最新回复
(
0
)