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
Jonas Frisen had’ his eureka moment in 1997. Back then, scientists suspected that there was a special type of cell in the brain
admin
2011-02-11
34
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 human brain. And he’s now researching the mechanisms by which these cells 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 cells 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. He’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 15-year professorship at Karolinska, eovering his salary and the running costs of his 15-person lab. "Jonas Frisen stood out from all candidates by far," says Storch, whose 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 fight, which argues that scientists ought to concentrate solely on adult stem ceils. 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.
Which of the following statements is TRUE of Frisen?
选项
A、He was encouraged by his parents to do research on stem-cells.
B、He founded a company on drug research in Karolinska.
C、He was considered the best person on stem-cells research.
D、After graduation, he did what he had intended to do.
答案
C
解析
细节题。根据题目顺序定位至第三段。倒数第三句指出:Jonas Frisen stood out from all candidates by far,C符合文意,故为答案。本段倒数第三句提到Frisen的实验研究“stem-cell research”,B中的drug research与此矛盾,排除。第三句指出: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.D不符合文意。A文中未提及,排除。
转载请注明原文地址:https://jikaoti.com/ti/3gpYFFFM
0
专业英语八级
相关试题推荐
Ithasalwaysbeendifficultforthephilosopherorscientiststofittimeintohisviewoftheuniverse.PriortoEinsteinianp
Ithasalwaysbeendifficultforthephilosopherorscientiststofittimeintohisviewoftheuniverse.PriortoEinsteinianp
Ithasalwaysbeendifficultforthephilosopherorscientiststofittimeintohisviewoftheuniverse.PriortoEinsteinianp
Ithasalwaysbeendifficultforthephilosopherorscientiststofittimeintohisviewoftheuniverse.PriortoEinsteinianp
ThomasJefferson,whodiedin1826,loomseverlargerasafigureofspecialsignificance.Americans,ofcourse,arefamiliarwi
Whenscientistsfirstwarnedinthe1970sthatCFCscouldattackozone,theU.S.respondedbybanningtheiruseinspraycans.B
There’sasimpleideathattwoofWestGermany’stopcarmanufacturersseriouslystudyingatthemoment,bothoutofselfintere
ResearchintoDNAhashadasignificantimpactonmedicine.ThroughrecombinantDNAtechnology,scientistscanmodifymicroorgan
随机试题
不属于蜜炙法炮制的药材是
A.过氧乙酸B.甲醛C.新洁尔灭D.纯乳酸E.乙醇
既清热解毒,又凉肝定惊的药是
人体酸碱平衡的调节主要依靠()。
《建设项目环境影响评价资质管理办法》规定:评价机构有( )所列行为之一的,国家环境保护总局视情节轻重,分别给予警告、通报批评、责令限期整改3~12个月、缩减评价范围、降低资质等级或者取消评价资质。
当前,我国以“儒”为主要组成部分的国学盛行。对于国学热现象,你怎么看?
只有在湿度高且光线昏暗的山林里才会有野生灵芝生长。紫金山林区没有野生灵芝生长。若以上判断为真,可推出以下哪项结论?()Ⅰ.紫金山林区湿度不高并且光线不昏暗。Ⅱ.如果紫金山林区光线昏暗,则肯定湿度不高。Ⅲ.如果紫金山林区湿度高,则肯定光线不昏
运动会上100名运动员排成一列,从左向右依次编号为1—100,选出编号为3的倍数的运动员参加开幕式队列,而编号为5的倍数的运动员参加闭幕式队列。问既不参加开幕式又不参加闭幕式队列的运动员有多少人?()
下列物权中,可以以权利为客体的物权是()
下列选项中,当x为大于1的奇数时,值为0的表达式是()。
最新回复
(
0
)