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
25
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
Oneofthequestionscomingintofocusaswefacegrowingscarcityofresourcesintheworldishowtodividelimitedresources
Oneofthequestionscomingintofocusaswefacegrowingscarcityofresourcesintheworldishowtodividelimitedresources
Oneofthequestionscomingintofocusaswefacegrowingscarcityofresourcesintheworldishowtodividelimitedresources
Inthissection,youwillhearashortpassage.Thereare10missingwordsorphrases.Fillintheblankswiththeexactwordso
Ifyoucouldgoonvacationasanyoneyouwanted,whowouldyouchoose?JoelStaindecidedhe’dmakeagreatRickyMartin.Welco
Ifyoucouldgoonvacationasanyoneyouwanted,whowouldyouchoose?JoelStaindecidedhe’dmakeagreatRickyMartin.Welco
Oneofthemostprevalentcharacteristicsofnatureisthatitissoversatile.Thiscanbeseeninthemanydifferentformsof
Oneofthemostprevalentcharacteristicsofnatureisthatitissoversatile.Thiscanbeseeninthemanydifferentformsof
Astheworld’surbanpopulationgetsbigger,citiesarestrugglingtoprovidethebasicservicesthattheirresidentsneed.One
Astheworld’surbanpopulationgetsbigger,citiesarestrugglingtoprovidethebasicservicesthattheirresidentsneed.One
随机试题
下列各项可能成为教育法律关系客体的有()。
温经汤证得主要病机是()
A.佐金平木B.抑木扶土C.金水相生D.培土生金E.滋水涵木肺脾气虚之证在五行学说中采用的治法是()。
从防止权利滥用的角度阐述权利的界限。
在施工中监理工程师发现某质量事故将如何处理?
一个公司或企业要设置内部报表时必须做到( )。
()是指银行依据客户需求的差异性和类似性,把整个市场划分为若干客户群,区分为若干子市场。
下列关于分批法的说法中,正确的有()。
《英烈法》规定,()应当将英雄烈士纪念设施建设和保护纳入国民经济和社会发展规划、城乡规划,加强对英雄烈士纪念设施的保护和管理。
福建的第二大河是()。
最新回复
(
0
)