时间:2019-01-17 作者:英语课 分类:2017年NPR美国国家公共电台5月


英语课

 


SCOTT SIMON, HOST:


Three-D printers are being used these days to make all kinds of things - jewelry 1, artwork, or even guns. Now, scientists have used a 3-D printer to create a functioning mouse ovary. Yes. NPR's Rob Stein explains.


ROB STEIN, BYLINE 2: So you're probably thinking, why in the world would anyone want to use a 3-D printer to print an ovary? Well, Teresa Woodruff at Northwestern University says, there's a really good reason.


TERESA WOODRUFF: My work has been on trying to preserve and restore fertility to young cancer patients who will survive their cancer treatment. But oftentimes, that same life-preserving treatment can be fertility threatening.


STEIN: The chemotherapy that saves their lives destroys their ovaries, leaving them infertile 3. So Woodruff decided 4 to see if she could use a 3-D printer to help them.


WOODRUFF: It's just like the 3-D printers people even have in their homes, but the ink in this case is a biological ink. It's called gelatin.


STEIN: Which is a naturally occurring substance that helps form the skeletons of organs. The 3-D printer squirts out the gelatin ink in very precise patterns, one layer on top of another, to create a complex three-dimensional structure.


WOODRUFF: And so we are able to use 3-D printing to actually lay down a scaffold that was copying what we knew the scaffold looked like of the normal ovary.


STEIN: It's about the size of an eraser at the end of a pencil. Next, they put tissue known as follicles inside the scaffolds. Follicles contain eggs and are surrounded by cells that pump out hormones 5 necessary for reproduction. Woodruff calls it a bio prosthetic.


WOODRUFF: And the bio prosthetic was then transplanted into a mouse that had been sterilized 6. And now, that tissue could produce the hormones, estrogens and progesterones. And when we mated that animal, the follicles were functional 7. They ovulated, released an egg, and we had live, healthy offspring.


STEIN: In the journal Nature Communications, the researchers report that 3 out of 7 mice that got these printed ovaries had healthy pups.


WOODRUFF: Well, our goal is to be able to develop these ovarian bio prosthetics for our cancer patients who have lost ovarian function.


STEIN: By removing some of their follicles before they get treated, putting them into bigger ovary scaffolds printed on 3-D printers, and then transplanting them into women when they're done with their chemo.


WOODRUFF: I think that it's really the holy grail of bioengineering for regenerative medicine.


STEIN: Other experts agree.


KUTLUK OKTAY: I found this paper very exciting.


STEIN: Kutluk Oktay specializes in this kind of research at New York Medical College. He says, a lot more research is needed to know whether this sort of thing could work in humans, but he's optimistic.


OKTAY: I think it does open a new avenue in the area of reproductive biology and fertility.


STEIN: Woodruff has already started trying to create human ovaries this way and hopes to start testing a 3-D printed human ovary within a couple of years. Rob Stein, NPR News.



n.(jewllery)(总称)珠宝
  • The burglars walked off with all my jewelry.夜盗偷走了我的全部珠宝。
  • Jewelry and lace are mostly feminine belongings.珠宝和花边多数是女性用品。
n.署名;v.署名
  • His byline was absent as well.他的署名也不见了。
  • We wish to thank the author of this article which carries no byline.我们要感谢这篇文章的那位没有署名的作者。
adj.不孕的;不肥沃的,贫瘠的
  • Plants can't grow well in the infertile land.在贫瘠的土地上庄稼长不好。
  • Nobody is willing to till this infertile land.这块薄田没有人愿意耕种。
adj.决定了的,坚决的;明显的,明确的
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
v.消毒( sterilize的过去式和过去分词 );使无菌;使失去生育能力;使绝育
  • My wife was sterilized after the birth of her fourth child. 我妻子生完第4个孩子后做了绝育手术。 来自辞典例句
  • All surgical instruments must be sterilized before use. 所有的外科手术器械在使用之前,必须消毒。 来自辞典例句
adj.为实用而设计的,具备功能的,起作用的
  • The telephone was out of order,but is functional now.电话刚才坏了,但现在可以用了。
  • The furniture is not fancy,just functional.这些家具不是摆着好看的,只是为了实用。
学英语单词
actionees
airpasses
aminoterminal
angiotonins
anion semipermeable membrane
anti-passback
anti-vortex baffle
antimutagenesis
at the expense of sth
autonomous replication sequence
blue rubber bleBnevus
Buckley R.
burgoo
cargo lifting ability
centre anchor
circumvolutio cristata
congenital aneurysm of ventricular septum
couponer
crankshaft bearing oil seal
cricetid
datasystems
declining unit use charge method
derogated
detreat
differential marginal productivity
EAC-ROSETTE
enclosed machine
face-downs
factories
Fannin County
finitely closed subcategory
foreign source stock option profits
Fructus Podophylli
Fundición
Gaius Julius Caesar Octavianus
Gallomaniac
galvanometric camera
gammairon
Guérinka
hand assembly language
hemihedral symmetry
Hunzinger chair
hydrosulfite vat
icicles
interacting redundancy
jet-flame drill
key questions
Klett value
lacorte
laser antenna
law of intensity
length of delay
lephepe (lephephe)
luminous house number
Manihiki Atoll
market strategist
melanotrope
methyl iodoform
micromillimetre
milk room
millionaires
mixed data model
moment of clarity
Networking Standards
nitrides
nurse tissue
oil pollution victim
pepitas
perquaric (c.i.p.w.)
person of the year
pfl
placental infection
primary design variable
pulsating voltage
pussy-footings
quasi-insulato
raw clay
reinforcement unit
reservoir triggered seismicity
Robertsonian change
RSNP
Scirpus chunianus
shoot'em-up
solventogenic
spitefullest
spring range
stumers
sulfarlem
sulphonanilid
survey of the task
survival requirement
tutorial class
two-impulse orbital transfer
unshape
uranothorogummite
urchin
varying plant population
very narrow bean receiver
whole caboose
wipe away
wire-sharing system
xylosylglucosylapigenin