
- 积分
- 1184
- 威望
- 1184
- 包包
- 1887
|

2010年Science杂志总结出的10大科技进展中,有关细胞重编程的描述:
$ G/ m h' r/ I8 p$ D) q
/ Y- T* r6 B* a7 K" jSouped-Up Cellular Reprogramming
0 |6 d* F8 m+ ~. a1 L" P, K6 l) w* s o) ?; D {4 |) V
Changing a cell’s fate by adding extra copies of a few genes has become routine in labs around the world. The technique,
9 }+ L, m3 E$ A! t# h4 ~& B) E/ mknown as cellular reprogramming, allows scientists to turn back a cell’s developmental clock, making adult cells behave
7 T5 H1 y) \1 _like embryonic stem cells (see “Insights of the Decade,” p. 1612). The resulting induced pluripotent stem cells (iPSCs)% f/ W" y; N4 g% _( e8 Y, p
are helping scientists to study a variety of diseases and may someday help to treat patients by supplying them with genetically @2 V' T$ k4 k3 q# t
matched replacement cells.# n" T9 }! k* F; |
This year, scientists found a way to make reprogramming even easier using synthetic RNA molecules. The synthetic RNAs8 [. X8 h8 e+ o' L$ K# c
are designed to elude the cell’s antiviral defenses, which usually attack foreign RNA. The technique is twice as fast and 100 times
e' _( G# B& a( a* Q: G0 R8 ]4 Oas efficient as standard techniques. And because the RNA quickly breaks down, the reprogrammed cells are genetically identical
g; O, D7 @! w S& H) c lto the source cells, making them potentially safer for use in therapies.
, Z* o' R; s: l P
5 f4 c- b' R, ]2 y0 O6 B' i4 xEarly evidence suggests that the RNA approach reprograms the cell more thoroughly than other methods do, yielding a& o4 U' y' U3 U) E1 T$ T" J2 w
closer match to embryonic stem cells. The method can also prompt cells to become nonembryonic cell types. By inserting synthetic
& M" Z$ _( {1 e. Y9 l, p' j- V6 LRNA into a cell that codes for a key gene in muscle tissue, for example, the researchers could turn both fi broblasts and iPSCs into muscle cells.
9 q1 B, Z4 `8 v: t6 `7 Z编者对具有调控的RNA分子在细胞重编程中的作用的预言,这么快就实现了,呵呵,说不定就是文章的作者提前透露出来的消息呢。
! r8 P" t1 B; ]. b) \
7 W1 u, c. V3 L. z
Z& K. S, ~: M Z V2 d, `; b: R8 |
|
附件: 你需要登录才可以下载或查看附件。没有帐号?注册
-
总评分: 威望 + 5
包包 + 10
查看全部评分
|