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
Scientists have cured color blindness in monkeys using gene therapy. As well as allowing color-blind humans to tell red from
Scientists have cured color blindness in monkeys using gene therapy. As well as allowing color-blind humans to tell red from
admin
2019-07-19
24
问题
Scientists have cured color blindness in monkeys using gene therapy.
As well as allowing color-blind humans to tell red from green, the innovative technique could restore sight to the blind.
Sufferers of age-related macular degeneration—the most common cause of blindness in the elderly—are among the millions who could eventually benefit.
Researcher Jay Neitz said: " If we could find a way to do this with complete safety in human eyes, as we did with monkeys, there would be a lot of people who would want it. We hope the technology will be useful in correcting a lot of different vision disorders.
Professor Neitz used gene therapy—injections of genes—to allow two male squirrel monkeys called Sam and Dalton to see in full color for the first time.
Like some humans with red-green colour blindness, the monkeys lacked a pigment that the cones—the colour—detector cells at the back of the eye—need to see red and green. As a result, they saw both red and green as shades of grey. Other colours, such as orange, blue and brown appeared washed-out.
To correct their vision, the US scientists injected the monkey’s eyes with millions of copies of a gene needed to make the missing pigment, the journal Nature reports.
Importantly, the monkeys were injected with a human gene, suggesting the same technique would work on people. Four months later, their vision suddenly improved.
Professor Neitz, of the University of Washington in Seattle, said; "it was as if they woke up and saw these new colours. They unquestionably responded to colours that had been invisible to them. "A version of the colour blindness test that is used in schools around the world showed just how much their vision has improved.
Dr Katherine Mancuso, the study’s lead author, said: "Their performance on red and green was similar, but not quite as good, us a female monkey who had normal colour vision since birth.
The need to prove that adding genes to the body does not cause harmful side-effects means it will be some time before the method is routinely used to correct colour blindness in humans. Despite this, the researchers are optimistic and point out that gene therapy is already being tested on Britons and Americans with a rare, hereditary form of blindness called Leber’s congenital amaurosis.
The technique could also be adapted to treat other conditions that involve problems with genes in the colour and detail-detecting cone cells at the back of the eye. These include age-related macular degeneration, in which the deterioration of central vision makes it increasingly difficult to carry out everyday tasks such as reading and driving. Blindness linked to diabetes might also be treated.
Cathy Yelf, of the Macular Disease Society, said the research was "very interesting" but cautioned; "A practical gene therapy for macular degeneration is still some way off.
What does Cathy Yelf say about the technique’ s practical application?
选项
答案
It is still some way off.
解析
(最后一段引用了Cathy Yelf对于基因疗法的看法:它的实际应用还有很长一段路要走。)
转载请注明原文地址:https://kaotiyun.com/show/Y1fK777K
本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
0
A类竞赛(研究生)
大学生英语竞赛(NECCS)
相关试题推荐
SomepeoplewouldsaythattheEnglishman’shomeisnolongerhiscastle;thatithasbecomehisworkshop.Thisispartlybecaus
Oneofthequestionscomingintofocusaswefacegrowingscarcityofresourcesintheworldishowtodividelimitedresources
Inthissection,youwillhearashortpassage.Thereare10missingwordsorphrases.Fillintheblankswiththeexactwordso
Inthissection,youwillhearashortpassage.Thereare10missingwordsorphrases.Fillintheblankswiththeexactwordso
Inthissection,youwillhearashortpassage.Thereare10missingwordsorphrases.Fillintheblankswiththeexactwordso
Ifyoucouldgoonvacationasanyoneyouwanted,whowouldyouchoose?JoelStaindecidedhe’dmakeagreatRickyMartin.Welco
WhichofthefollowingisthemostfamousworkoftheAmericannovelistF.ScottFitzgerald?
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodernsocietyhaschangedpeo
Astheworld’surbanpopulationgetsbigger,citiesarestrugglingtoprovidethebasicservicesthattheirresidentsneed.One
Astheworld’surbanpopulationgetsbigger,citiesarestrugglingtoprovidethebasicservicesthattheirresidentsneed.One
随机试题
当建设工程竣工验收时,为了鉴定工程质量,对隐蔽工程进行必要的开挖和修复,费用应从()中支付。
背景材料:某写字楼工程,建筑面积14352m2。箱型基础,现浇钢筋混凝土框架结构。目前进行内部装修阶段,在装修施工前,已对各部位装修材料的燃烧性能进行了技术交底工作。装修工程完工后,建设单位项目负责人组织施工单位项目负责人、监理工程师和设计单
地下工程防水混凝土结构,应符合下列规定()。
在个人或家庭财务比率分析中,反映客户家庭在一段时期内(通常是一年)财务状况良好程度的指标是()。
注册会计师在考虑出具保留意见的审计报告时,以下不正确的做法是()。
某木制品公司(一般纳税人)在2014年12月生产非一次性高档木筷1000箱,每箱不含税售价800元;另生产未经打磨的一次性木筷子500箱,单箱不含税售价200元。本月的产品全部销售,木制一次性筷子的消费税税率为5%。则当月应缴纳的增值税和消费税合计为(
国家旅游局2010年财政拨款支出中的基本支出占收支预算总表中的支出总计的比重为()。
Everyoneknowsastonebouncesbestonwaterifit’sroundandflat,andspuntowardsthewaterasfastaspossible.Someenthus
唯一可以知道一个人是否患上感冒的方法就是观察感冒的症状,因此,当有人被认为患有感冒时,这仅说明他表现出了感冒的症状,而没有理由据此预测他未来的症状。以下哪项中所描述的逻辑错误和上文论述中的最类似?
Wateristofish______airistoman.
最新回复
(
0
)