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
Jonas Frisen had his eureka moment in 1997. Back then, scientists suspected that there was a special type of cell in the brain t
Jonas Frisen had his eureka moment in 1997. Back then, scientists suspected that there was a special type of cell in the brain t
admin
2010-07-19
23
问题
Jonas Frisen had his eureka moment in 1997. Back then, scientists suspected that there was a special type of cell in the brain that had the power to give rise to new brain cells. If they could harness these so-called neural stem cells to regenerate damaged brain tissue, they might someday find a cure for such brain diseases as Alzheimer’s and Parkinson’s. But first they had to figure out where neural stem cells were and what they looked like. Frisen, then a freshly minted Ph. D. at the Karolinska Institute in Stockholm, was peering through his microscope at some tissue taken from a rat’s injured spinal cord when he saw cells that appeared to have been enervated by the injury, as though they were busy making repairs. Frisen thought these might be the neural stem cells scientists had been looking for. It took him six years of painstaking research to make sure.
Frisen is quick to emphasize that his research is basic and that treatments are years off. But the findings so far hint at extraordinary potential. Two years ago he identified neural stem cells in the adult humanbrain. And he’s now researching the mechanisms by which these ceils grow into different types of brain cells. Rather than growing brain tissue in a petri dish and implanting it in, say, the forebrain of a Parkinson’s patient, doctors might someday stimulate the spontaneous growth of new neural ceils merely by administering a drug. "It sounds like science fiction," Frisen says, "but we can already do it in mice." In 2007 he will publish the results of his recent experiments, lie’s isolated a protein in the mouse brain that inhibits the generation of nerve cells. Using other chemicals, he’s been able to block the action of this inhibitor, which in turn leads to the production of new brain cells.
Frisen honed his analytical mind at the dinner table in Goteborg, in southwest Sweden. His mother was a mathematics professor and his father was an ophthalmologist. Frisen went to medical school intending to be a brain surgeon or perhaps a psychiatrist, but ended up spending all his free time in the lab. In 1998 he got seed money from a Swedish venture capitalist to set up his own company, NeuroNova, to commercialize his work. A private foundation tried to lure him to Texas, but Swedish businessman Marcus Storch persuaded him to stay by funding a IS-year professorship at Karolinska, covering his salary and the running costs of his 15-person lab. "Jonas Frisen stood out from all candidates by far," says Storch, who*Ic Tobias Foundation sponsors stem-cell research. "He is something of a king in Sweden." Two years ago two more venture capitalists helped the company expand by hiring a CEO and setting up a separate lab.
Since most researchers are interested in stem cells taken from embryos, the practice has attracted considerable controversy in the past few years. Frisen has benefited indirectly from research restrictions in the United States, which have driven funds and brain-power to Singapore, the United Kingdom and Sweden. The Bush Administration currently forbids U. S. -funded work on all but 78 approved stem-cell cultures, many of which are located outside the country. In just one sign of the times, the U. S. -based Juvenile Diabetes Research Foundation recently announced grants totaling $ 20 million for stem cell research--the largest award yet given to the field by a medical charity--to research institutes in Sweden and elsewhere, but not in the United States.
Since Frisen doesn’t work with embryonic stem cells, he’s unwittingly become a champion of the radical right, which argues that scientists ought to concentrate solely on adult stem cells. He happens to disagree. "It would be overoptimistic or outright stupid." he says. "To really understand adult cells, we need to master how embryonic stem cells work." But what really gets Frisen going is when people ask him when they can expect a drug for Parkinson’s and other diseases. "I say, five decades, just to get the number thing out of the way," he quips. "I’m not going to oversell this." When pressed, he admits that clinical trials might begin in five years. That would be a eureka moment worth waiting for.
According to the passage, what does the author think of Frisen’s findings?
选项
A、They enable cells to make repairs.
B、They are elementary achievements.
C、They have a limited application prospect.
D、They imply and show great potential.
答案
D
解析
细节题。由题干中的findings定位至第二段。第二句指出:But the findings so far hint at extraordinary potential,此处没有引述Frisen本人或他人的观点,[D]符合义意,故为答案。这里提到Frisens的发现具有极大的潜力,[C]中的limited 与 extraordinary矛盾,排除。首句提到;Frisen is quick to emphasize that his research is basic,这是Frisen的观点,并非作者观点,排除。[A] 是针对首段倒数第三句中的as though they were busy making repairs设计的干扰项,这里是Frisens对其观察到的现象的描述,并非作者观点,排除 [A]。
转载请注明原文地址:https://kaotiyun.com/show/DrlO777K
0
专业英语八级
相关试题推荐
WutheringHeightsisthemasterpieceby______.
Chileisdisadvantagedinthepromotionofitstourismby______.ManyofChile’stouristsusedtocomefromEXCEPT______.
TheGeneralElectioninBritainisheldevery______years.
Thewritersuggeststhatthereisnosenseinbuyingthelatestvolume______.Theauthorquotedafewentriesinthelastpara
WhichofthefollowingisTRUE?Somepeoplesufferingfromapaindonotgotohospitalbecause______.
Wecaninferfromthefirsttwoparagraphsthattheindustrialistsdisregardenvironmentalprotectionchieflybecause______.A
Linguisticsuse______torefertotheabstractlinguisticsystemsharedbythemembersofaspeechcommunity.
Thenaturalenvironmenthas,ofcourse,alwaysconditionedtechnology.Forexample,thenatureofanenvironment(polar,desert,
OneofShelley’sgreatestpoliticallyricsis______,whichlaterbecamearallyingsongoftheBritishCommunistParty.
A、commons.B、farmers.C、aristocrats.D、workers.C
随机试题
按照公共关系的观点,某新闻单位所在街道的街道办事处,是该新闻单位的【】
为了维护种姓的纯洁,古印度法规定原则上不同种姓不得通婚,但种姓间的通婚并非绝对不可能,允许高等种姓男子与低等种姓女子结婚,此种婚姻被视为()
Windows2000中,如果一个文件夹中包含了子文件夹,则这个文件夹称为这些子文件夹的
口唇疱疹多为__________病毒感染所引起;口唇肥厚增大见于__________、__________以及__________。
气滞血瘀型锁肛痔方选:气滞血瘀型钩肠痔:
男,70岁,上腹痛1年,进食后加重,大便10次/天,可见脂肪滴,查体:中腹部压痛(+),腹部B超:胰腺多发钙化灶,应给予的药物是
合同履行中,承担违约责任的方式包括( )等。
对私募基金业务活动进行自律管理的机构是()。
你的同事因被投诉而受到领导批评。后来他得知投诉他的就是你的亲戚。因此他认为是你授意的。认为你要和他竞争.你怎么办?
Acircularwheeltravelsalongaflatsurfaceataconstantrateof2.5feetpersecond.Howmanycompleterevolutionswillthe
最新回复
(
0
)