使用MEF来源的条件培养基代替feeder。 ' r" Z& |$ L! f, D4 K条件培养基制作方法如下: * C6 q! Y1 V) i* iPreparation of MEF- Conditioned Medium (MEF-CM)& b, o6 R4 \. |1 u" ? I
1. Plate 4 x 106 mitomycin C treated MEFs in a T75 Flask coated with 0.5% gelatin, in complete MEF medium. ) n& Z% ]. H$ m3 p2. The following day, replace the MEF medium with 37.5 ml 20% KSR hESC medium containing 4 ng/ml bFGF, and incubate for 24 hrs at 37°C, 5% CO2.1 @5 D0 q6 x* u+ d
3. Collect MEF-CM from the flasks after 24 hrs and 0.22 μM filter sterilize. MEF-CM can be used fresh or can be frozen. * N: B$ d& X" X. Y7 H* F4. Add fresh 20% KSR hESC medium containing 4 ng/ml bFGF to the flasks., D" X$ [, r# v+ i. d5 d& P- ^
5. Collect MEF-CM for up to seven days using this procedure. * l; o2 P, k- z7 i _" w4 M6. Depletion of L-Glutamine and bFGF from the MEF-CM is assumed, and L-Glutamine (to 2 mM final), and bFGF (to 4 ng/ml final) are therefore added back prior to using MEF-CM with hESCs. Freshly thawed ß-Mercaptoethanol (ß-Me) is added to 0.1 mM final fresh each day of use.作者: 待鹤 时间: 2010-3-17 17:33
这儿还有Nature上的一篇protocol。 , W4 N: a, _: x# T0 SFeeder-free culture of human embryonic stem cells in conditioned medium for efficient genetic modification.pdf % c: i& S, v/ K0 e- x5 K' j[attach]4929[/attach]作者: mominglily 时间: 2010-3-18 17:37