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
31
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.
Which of the following is true according to the text?
选项
A、Ashanthi needs to receive gene-therapy treatment constantly.
B、Despite the huge funding, gene researches have shown few promises.
C、Therapeutic genes are carried by harmless viruses.
D、Gene-doping is encouraged by world agencies to help athletes get better scores.
答案
C
解析
文章第二段对于基因治疗的方式的解释是用于治疗的基因通过“viruses that don’t cause human disease”进入体内,就好像“特洛伊木马”一样,由此可见,这些病毒是无害的。因此正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/0VXd777K
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
Thesecondparagraphseemstosuggestthat______Fromthepassagewemayinferthat______
Guamisdescribedas______TogetaroundonGuam,atouristcanpayfor______
Impatiencecharacterizesyoungintellectualworkers.Theywanttomaketheirmark(31).Soit’simportanttoget(32)tothemin
WhatisGeorgeOrwellmainlyknownas?
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
TheemergenceoftheaffluentsocietyafterWorldWarⅡ______.Accordingtothepassage,consumeristculture______.
Inrecentyears,workingathomeforone’semployershasbecomeagrowingtrendinmanycountriesandisexpectedtobecommonJ
Researchcarriedoutintherecentopinionpollsshowsthat______.Theenclosuresofthe17thand18thcenturiesmeantthat__
Thingsmustbegoingwellintheparcelsbusiness.Consumersandcompaniescontinuetoflockindrovestotheinternettobuyan
WhatisGeorgeOrwellmainlyknownas?
随机试题
为避免误差,问卷的题项用语要非常谨慎,简述在选择题项用语时应遵循的原则。
正常人脑脊液白细胞数为
铁路工程项目招标采用施工总价承包方式的,投标人应按招标文件中载明的费用进行报价的费用是()。
未按照规定保管会计资料,致使会计资料毁损、灭失的行为应承担的法律责任有()。
某企业拟转让其拥有的某产品的商标使用权,该商标产品单位市场售价为1000元/台,比普通商标同类产品单位售价高100元/台,拟购买商标企业年生产能力100000台,双方商定商标使用许可期为3年,被许可方按使用该商标的产品年销售利润的30%作为商标特许权使用费
文职人员因参加军事训练、非战争军事行动和作战支援保障任务伤亡的抚恤优待,参照()的有关规定办理。
Directions:Writeacompositionentitled"UsingContestinVocabularyTeaching"within300words.Writeyourcompositiononthe
根据下图,回答以下问题。与2003年相比2004年世界经济增长最快的是()。
Internet中域名与IP之间的翻译是由______来完成的。
BasketballOrganizedbasketball【T1】______twoteamsoffiveplayerseach.Theplayersscorepointsby【T2】______intoaraised
最新回复
(
0
)