- T+ j& `8 N8 Q6 Q" Z0 j/ }$ N1 \JBC:发现指示干细胞发育潜能的标记 [周琪实验室最新研究进展]+ G! J4 b7 J" s# d. w
Cell Stem Cell:iPS细胞可在胚胎中正常发育[09年度高绍荣实验室重大进展] 9 d2 V) |+ V- [Nature:iPS细胞注射入囊胚培育出健康小鼠[09年度周琪实验室重大进展] 5 v/ x1 b) I; J* a2 v / e4 c; J" U. m% x5 h2 E7 I2009年8月,高绍荣的实验室在Cell Stem Cell上首次报道通过四倍体互补实验(tetraploid complementation)得到完全由iPS细胞来源的成体小鼠。9月,中科院动物所周琪研究员的实验室和美国scripps研究所Baldwin KK的实验室在Nature上报道了同样的研究结果。四倍体互补试验是检测干细胞发育潜能最严格的标准,该研究表明iPS具备和ES同样的发育潜能,打消了某些人担心iPS不能完全替代ES的顾虑。iPS的应用首先要求将iPS高效的分化成功能细胞。2009年8月,邓宏魁的实验室在Cell Research上报道成功将人iPS细胞高效的分化成能分泌胰岛素的成熟胰岛细胞。11月,该研究组又成功的将人iPS细胞分化成肝细胞,该研究同样发表在Cell Research上。2009年12月,裴端卿带领的研究小组发现,通过在培养过程中添加维生素C使iPS诱导效率提高了10倍。通过老鼠和人细胞实验发现,培养时添加维生素C可促进相关基因表达,推动体细胞进入重编程状态。该成果发表于Cell Stem Cell杂志。>>了解更多<< % P" [! c5 j" D0 L. O3 N5 Q O 8 X, K @$ y J: O! _8 k6 D' j2010干细胞技术与应用讲座专题 9 \$ `' h( t& l0 \! @0 g - e+ H% O* L, V; J3 ` # o8 Y! v% Q" b U生物谷推荐原文出处: 5 i& ~" D$ |" R H g% C, B6 | # o" x( E* {" ?: i7 D) X7 }Biology of Reproduction doi: 10.1095/?biolreprod.110.084731 . J5 q/ }: T+ n- e2 g2 X/ v: y6 B2 ?% @; O% Y8 O
Mice Cloned from Induced Pluripotent Stem Cells (iPSC)$ F$ |+ ~4 n* R8 i+ b4 ?
Zhaohui Kou, Lan Kang, Ye Yuan, Yu Tao, Yu Zhang, Tong Wu, Jing He, Jianle Wang, Zhonghua Liu and Shaorong Gao 8 I& ?6 [. x6 b" K5 P8 J3 c; G# _) j 1 N# Y! D- H$ C6 VDifferentiated somatic cells of various species could be reprogrammed into induced pluripotent stem cells (iPSC) by ectopically expressing a combination of several transcription factors which are highly enriched in embryonic stem cells (ESC). The generation of iPS cells in large animals has raised the possibility of producing genetically modified large animals through nuclear transplantation approach. However, it remains unknown whether iPSC could be used for generating cloned animals through nuclear transfer method. Here, we show the successful production of viable cloned mice from inducible iPSC through nuclear transfer approach, and the efficiency is similar to using ESC derived via normal fertilization. Furthermore, the cloned mice are fertile and can produce second-generation offspring. These efforts strengthened the possibility of utilizing iPSC to generate gene modified large animals for pharmaceutical purposes in the future.