首页
登录
职称英语
Gene therapy and gene based drugs are two ways we could benefit from our grow
Gene therapy and gene based drugs are two ways we could benefit from our grow
游客
2023-12-24
32
管理
问题
Gene therapy and gene based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be others as well. Here is one of the remarkable therapies on the cutting edge of genetic research that could make their way into mainstream medicine in the coming years.
While it’s true that just about every cell in the body has the instructions to make a complete human, most of those instructions are inactivated, and with good reason: the last thing you want for your brain cells is to start churning out stomach acid or your nose to mm into a kidney. The only time cells truly have the potential to turn into any and all body parts is very early in a pregnancy, when so called stem cells haven’t begun to specialize.
Yet this untapped potential could be a terrific boon to medicine. Most diseases involve the death of healthy cells—brain cells in Alzheimer’s, cardiac cells in heart disease, pancreatic cells in diabetes, to name a few; if doctors could isolate stem cells, then direct their growth, they might be able to furnish patients with healthy replacement tissue.
It was incredibly difficult, but last fall scientists at the University of Wisconsin managed to isolate stem cells and get them to grow into neural, gut, muscle and bone cells. The process still can’t be controlled, and may have unforeseen limitations; but if efforts to understand and master stem cell development prove successful, doctors will have a therapeutic tool of incredible power.
The same applies to cloning, which is really just the other side of the coin; true cloning, as first shown with the sheep Dolly two years ago, involves taking a developed cell and reactivating the genome within, resetting its developmental instructions to a pristine state. Once that happens, the rejuvenated cell can develop into a full fledged animal, genetically identical to its parent.
For agriculture, in which purely physical characteristics like milk production in a cow or low fat in a hog have real market value, biological carbon copies could become routine within a few years. This past year scientists have done for mice and cows what Ian Wilmut did for Dolly, and other creatures are bound to join the cloned menagerie in the coming year.
Human cloning, on the other hand, may be technically feasible but legally and emotionally more difficult. Still, one day it will happen. The ability to reset body cells to a pristine, undeveloped state could give doctors exactly the same advantages they would get from stem cells: the potential to make healthy body tissues of all sorts, and thus to cure disease. That could prove to be a true "miracle cure". [br] The research at the University of Wisconsin is mentioned to show ______.
选项
A、the isolation of stem cells
B、the effects of gene therapies
C、the advantages of human cloning
D、the limitations of tissue replacements
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3300015.html
相关试题推荐
Theadvocates—mainlyfamilytherapydoctors—areapplyinganewapproachtoevery
Theadvocates—mainlyfamilytherapydoctors—areapplyinganewapproachtoe
Relaxationtherapyteachesonenottofretoversmallproblems.A、worryaboutB、g
Itwouldbetoograndiosetosaythatthetherapyhelpedhimtosortouthisown
Theadvocates—mainlyfamilytherapydoctors—areapplyinganewapproachtoevery
Itwouldbetoograndiosetosaythatthetherapyhelpedhimtosortouthisown
Therapywillextendtofamiliesofvictimswhooftensuffertheirowntraumabec
Thebenefitofcomputersisthatit’seasiertocopyandmanipulateinformat
Infrastructureisofgreatsignificancesinceityieldsdiversebenefitstoecon
Genetherapyandgenebaseddrugsaretwowayswecouldbenefitfromourgrow
随机试题
Highinasmoothoceanofskyfloatedadazzling,majesticsun.Fragmentsofp
IthinkFrenchgrammarismuch(difficult)______tolearnthanEnglishgrammar.mo
NotSeeingtheForestfortheDollarBillsA)TheU.S.Fisha
.腹部平片,对下列状况诊断价值最低的是:()A.尿路结石 B.肾结核
低视力是指双眼的最好眼睛的最好矫正视力A.低于0.3而高于或等于0.05 B.
以下可诱发肝性脑病的因素中,应除外哪项A.大量排钾利尿 B.多次灌肠和导泻
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
关于合伙企业,下列说法中,不正确的是()。A.有限合伙企业由普通合伙人和有
在生产经营活动中,因违章指挥造成事故的人员,应对事故负()责任。 A.次要
甲乙因合同纠纷申请仲裁,在审理过程中,双方自行和解达成和解协议,并请求仲裁庭根据
最新回复
(
0
)