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
Alzheimer’s disease has no cure. There are, however, five drugs—known and approved—that can slow down the development of its sym
Alzheimer’s disease has no cure. There are, however, five drugs—known and approved—that can slow down the development of its sym
admin
2013-09-23
27
问题
Alzheimer’s disease has no cure. There are, however, five drugs—known and approved—that can slow down the development of its symptoms. The earlier such drugs are administered, the better. Unfortunately, the disease is usually first noticed when people complain to their doctors of memory problems. That is normally too late for the drugs to do much good. A simple and reliable test for Alzheimer’s that can be administered to everybody over the age of about 65 , before memory-loss sets in, would therefore be useful.
Theo Luider, of the Erasmus University Medical Centre in Rotterdam, and his colleagues think they have found one—but it works only in women. They made their discovery, just reported in the Journal of Proteome Research, by tapping into a long-term, continuing study that started in 1995 with 1, 077 non-demented and otherwise healthy people aged between 60 and 90. At the beginning of the project, and subsequently during the periods 1997-99 and 2002-04, participants were brought in for a battery of neurological(神经学的)and cognitive investigations, physical examinations, brain imaging and blood tests.
During the first ten years of the study, 43 of the volunteers developed Alzheimer’s disease. When Dr. Luider compared blood samples from these people with samples from 43 of their fellow volunteers, matched for sex and age, who had remained Alzheimer’s-free, he found something startling. Levels of a substance called pregnancy zone protein had been unusually high, even before their symptoms appeared, in some of those who went on to develop Alzheimer’s disease.
Those "some" , it turned out, were all women. On average, levels of pregnancy zone protein in those women who went on to develop Alzheimer’s were almost 60% higher than those of women who did not. In men, levels of the protein were the same for both.
The reason for this curious result seems to be that the brain plaques(斑块)associated with Alzheimer’s disease are themselves turning out pregnancy zone protein. Certainly, when Dr. Luider applied a chemical stain specific to that protein to the plaques of dead Alzheimer’s patients he found the protein present in them.
Confusingly, though, it was there in the plaques of both sexes. Presumably, female cells(and therefore the plaques of female brains)make more of it than male cells do. But that remains to be proved. Whatever the reason, however, this result means that women, at least, may soon be able to tell whether and when they are at risk of Alzheimer’s—and thus do something about it before they start losing their minds.
The passage is mainly about______.
选项
A、the development stages of Alzheimer’s disease
B、the pregnancy zone protein
C、a new discovery concerning Alzheimer’s disease
D、patients of Alzheimer’s disease
答案
C
解析
主旨题。本文开篇第一段指出阿尔茨海默病是难以治愈和难以发现的,并指出阿尔茨海默病预防治疗的一个重要环节,即在患者记忆力减退前诊断出该症状;接下来,第二到四段详述了关于阿尔茨海默病的一项新发现——女性阿尔茨海默病患者体内的妊娠区带蛋白质含量比未患此病的女性高很多,甚至在还未患上阿尔茨海默病之前,这些女性患者体内的妊娠区带蛋白质的含量已经相当的高;第五段分析了出现这一现象的原因;最后一段分析了该实验未解决的疑问以及肯定了这一新发现的意义。综上所述,本文都是围绕“阿尔茨海默病领域的一项新发现”展开的,故[C]为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/aJLK777K
0
专业英语四级
相关试题推荐
FamilyandYouthServicesCurrently,thereisagapintheinformationateacherreceivesaboutteachingstudentswithcert
DevelopmentofLaborUnionsThefactorysystemthatdevelopedaround1800changedworkingconditionsmarkedly,Theemployer
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofthemisunderstandingsbetw
______mannersareveryimportantineverycountryisknowntoallbutthetroubleis______differentcountrieshavedifferentide
Howmuchoftheearth’swatercanmanreallyuse?
Howmuchoftheearth’swatercanmanreallyuse?
MackTwiller,myfriend’shusband,______broughtupandeducatedinEurope,livedatlectureinAustraliamostofhislife.
Thecoursenormallyattracts20studentsperyear,______uptohaftwillbefromorient.
WorkersrecentlyarrestedinfederalraidsfiledaracketeeringlawsuitaccusingWal-Martofconspiringwithcontractorsinacr
Notafewexcellentproposalsbythecountriesofthethirdworldhavebeen______totheUnitedNations,acceptanceofwhichwill
随机试题
对X线防护效果最理想的是
患者,男性,22岁,4天前劳累后出现右下后牙区胀痛,进食、吞咽时加重。昨日起出现局部自发性跳痛,张口受限,低热、头痛,检查可见:右下颌角区颊部稍肿胀,无压痛,张口度两指,右下智牙近中阻生,牙龈红肿充血,挤压可见远中盲袋内少量脓液溢出,相当于颊侧前庭沟丰满、
下列实验动物中,常用于急性毒性研究的实验动物
某项目投入总资金5000万元,筹资方案为:银行借款2000万元,股东借款1000万元,股东投资2000万元,其融资成本分别为6%、7%、12%,该项目的加权平均资金成本为()。
任何单位和个人都不得擅自改变城市()的性质。
市场调查目标的确定,一般要经过提炼调查主题、确定调查项目和()等步骤。
单位人事调整,你觉得自己适合一个职位,领导却派你去另一个职位,你怎么办?
α波发展显著加速的第一个时期是
爱国主义是历史的、具体的,在不同的历史条件和文化背景下所形成的爱国主义,总是具有不同的内涵和特点。在当代中国,爱国主义首先体现在
W:Hi,Jane.Doyouhaveanychange?Ihavetomakeacallonthepayphone.M:______
最新回复
(
0
)