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人胚胎干细胞的单层内胚层分化

点击次数:1414 次    更新时间:2017-04-12

人胚胎干细胞的单层内胚层分化


人胚胎干细胞的单层内胚层分化
 
无血清条件下,activin A存在的胚胎干细胞分化,会生成一种共表达Brachyury, Foxa2 和 c-Kit或者c-Kit 和Cxcr4的内胚层祖细胞群。这些含骨形态生成蛋白-4的祖细胞结合碱性成纤维生长因子(FGF-basic)和activin A会使肝细胞群生长,高度富集(45–70%)表达alpha-甲胎蛋白和白蛋白的细胞。

 

Protocol

1. 准备ES细胞到matrigel plate,去除MEFs

► 准备1:3 matrigel plate:冰上预冷TC 培养板和移液管,冰箱或者冰上解冻1:3 matrigel。小心把matrigel包被在板子上且保证覆盖底部,然后吸出多余的matrigel(在包被 matrigel过程中保持所有东西预冷)。把matrigel plates放在冰上30 min。再次吸出多余的matrigel并把包被matrigel的板子37◦C孵育30 min。

► 37◦C TrypLE处理融合的ES细胞2-3 min(10 cm dish用4ml TrypLE或者6孔板的每孔1ml),然后吸出TrypLE。用wash media (IMDM + Glu + P/S + 0.1%BSA) 洗2-3次。10 cm dish加4ml hES media或者6孔板的每孔1ml,用细胞刮棒刮去板子底部的ES细胞。上下吹打3-5次,显微镜下观察直到可以得到5-10个细胞团。

► 接种细胞到matrigel-coated板子上


2. 设置T0:5% O2, 5% CO2条件下,当有70-80%融合时,细胞会发生分化。用wash media洗细胞2次并添加适量体积T0 培养基(如10cm dish加10ml,6孔板的每孔2ml)


3. 用wash media洗细胞并且每天更换培养基直到T5。前几天看到大细胞死亡是正常现象。


4. 进入肝分化,用Accutase 37◦C 3min分离T5细胞,wash media洗细胞两次。6孔板的每孔加入1ml wash media并刮下细胞。收集T5细胞,1200 rpm离心3min。用T5 media重悬细胞并且以1:6接种细胞到matrigel-coated 6孔板,250K cells/well。


5. 每2天用不同分化培养基接种细胞(如下),并在18-25天收集用于分析。

注:matrigel的每批内毒素水平和蛋白浓度都有差异,建议内毒素水平不高于2 units/mL,蛋白水平应在7-10mg/mL之间。如果蛋白水平较高,可能要多于1:1稀释,这取决于hESC克隆形态和hESC分化为需要系别的能力。操作matrigel过程中,所有管子、培养板和移液器都必须是预冷的,matrigel室温下回凝固。

 

附:

1) hES Media (500 ml)

DMEM/F12: 400 ml

KOSR: 100 ml

NEAA: 5 ml

L-glutamine: 5 ml

Pen/strep: 5 ml

β-Mercaptoethanol: 3.5 ul

bFGF: 10 ng/ml (50 ul of 100 ug/ml 贮存)

L-Ascorbic Acid: 50 ug/ml –每次培养基更换加新鲜的5 mg/ml贮存液

 

2) 分化培养基:

 
T0 Media
 
 
 
Basic Media
RPMI
 
 
Ingredient
Stock
Volume
Final
Glutamine
100x
10 ul/ml
1x
MTG (MONOTHIOGLYCEROL)
13 ul/ml
3 ul/ml
4.5 ×10-4 M
Chir 99021  
10 mM
0.2 ul/ml
 2 uM
Activin A  
100 ug/ml
1 ul/ml
100 ng/ml
 
T1 and T2 MEDIA
 
 
 
Basic Media
RPMI
 
 
Ingredient
Stock
Volume
Final
Glutamine
100x
10 ul/ml
1x
MTG (MONOTHIOGLYCEROL) 
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
BMP4  
10 ug/ml
0.025 ul/ml
0.25 ng/ml
bFGF  
10 ug/ml
0.5 ul/ml
5 ng/ml
Activin A  
100 ug/ml
1 ul/ml
100 ng/ml
VEGF  
25 ug/ml
0.4 ul/ml
10 ng/ml
 
T3 and T4 MEDIA
 
 
 
Basic Media
SFD
 
 
Ingredient
Stock
Volume
Final
MTG (MONOTHIOGLYCEROL)  
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
BMP4  
10 ug/ml
0.025 ul/ml
0.25 ng/ml
bFGF  
10 ug/ml
0.5 ul/ml
5 ng/ml
Activin A  
100 ug/ml
1 ul/ml
100 ng/ml
VEGF  
25 ug/ml
0.4 ul/ml
10 ng/ml
*SFD: 1L
750 ml: homemade IMDM (Invitrogen 12200-069) (1×10 L) (+ Glutamine, + 25 mM HEPES+P/S)
250 ml: Hams F12
5 ml: N2-supplement (Invitrogen 17502-048)
10 ml: B27 supplement w/o retinoic acid (Invitrogen 12587-010)
5 ml: 10% BSA in PBS

 


(3) 肝分化培养基:
 

DE T5 and T6 MEDIA
 
 
 
Basic Media
SFD
 
 
Ingredient
Stock
Volume
Final
Glutamine
100x
10 ul/ml
1x
MTG (MONOTHIOGLYCEROL) 
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
BMP4  
10 ug/ml
1 ul/ml
10 ng/ml
bFGF  
10 ug/ml
0.5 ul/ml
5 ng/ml
Activin A  
100 ug/ml
0.5 ul/ml
50 ng/ml
VEGF  
10 ug/ml
1 ul/ml
10 ng/ml
 
DE T7-T12 MEDIA
 
 
 
Basic Media
SFD
 
 
Ingredient
Stock
Volume
Final
Glutamine
100x
10 ul/ml
1x
MTG (MONOTHIOGLYCEROL)  
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
BMP4  
100 ug/ml
0.5 ul/ml
50 ng/ml
bFGF  
100 ug/ml
0.1 ul/ml
10 ng/ml
VEGF  
25 ug/ml
0.4 ul/ml
10 ng/ml
EGF
50 ug/ml
0.2 ul/ml
10 ng/ml
TGFα
50 ug/ml
0.4 ul/ml
20 ng/ml
HGF
100 ug/ml
1 ul/ml
100 ng/ml
DEX
50 uM
2 ul/ml
100 nM
 
T13-T18
 
 
 
Basic Media
SFD
 
 
Ingredient
Stock
Volume
Final
MTG (MONOTHIOGLYCEROL)  
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
bFGF  
100 ug/ml
0.1 ul/ml
10 ng/ml
VEGF  
25 ug/ml
0.4 ul/ml
10 ng/ml
EGF
50 ug/ml
0.2 ul/ml
10 ng/ml
HGF
100 ug/ml
1 ul/ml
100 ng/ml
OSM
100 ug/ml
0.2 ul/ml
20 ng/ml
DEX
50 uM
4 ul/ml
200 nM
VK(Vitamin K)
10 mg/ml
0.6 ul/ml
6 ug/ml
DMSO
dry
10 ul/ml
1%
gSI (γ-Secretase Inhibitor)
1mM
1.5 ul/ml
1.5 uM
 
Liver T19-T25
 
 
 
Basic Media
SFD
 
 
Ingredient
Stock
Volume
Final
MTG (MONOTHIOGLYCEROL)  
13 ul/ml
3 ul/ml
4.5×10-4 M
Ascorbic Acid  
5 mg/ml
10 ul/ml
50 ug/ml
HGF
100 ug/ml
1 ul/ml
100 ng/ml
OSM
100 ug/ml
0.2 ul/ml
20 ng/ml
DEX
50 uM
2 ul/ml
100 nM
VK(Vitamin K)
10 mg/ml
0.6 ul/ml
6ug/ml


 

主要产品介绍:

 
  cytokines
  Supplier/Catalog #
  Stock Conc.
  hBMP-4
  PeproTech # 120-05/120-05ET/AF-120-05ET
  10 ug/mL
  hbFGF 
  PeproTech # 100-18B/AF-100-18B/ 100-18C/AF-100-18C
  10 ug/mL
  hVEGF
  PeproTech # 100-20/AF-100-20
  5 ug/mL
  Activin A
  PeproTech # 120-14/AF-120-14/120-14E/AF-120-14E/120-14P
  10 ug/mL
  EGF
  PeproTech # AF-100-15
  100 ug/mL
  HGF
  PeproTech # 100-39/100-39H
  10 ug/mL
  TGFα
  PeproTech # 100-16A/AF-100-16A
  20 ug/mL
  Oncostatin M (OSM)
  PeproTech # 300-10/300-10T/AF-300-10T
  100 ug/ml
   
  细胞培养耗材
  Supplier/Catalog #
  细胞培养皿, 100 mm, TC 处理, 无菌, 无细胞毒性
  Eppendorf # 0030702115
  细胞培养板, 6孔, TC处理, 带盖, 平底, 独立包装, 无菌, 无细胞毒性
  Eppendorf # 0030720113
 


Matrigel
N2 supplement
DMEM/F12
B27 Supplement
KnockoutTM Serum Replacement (KOSR)
Non-Essentail Amino Acids
β-Mercaptoethanol
BSA
L-Ascorbic Acid
γ -Secretase Inhibitor
Monothioglycerol
Vitamin K (VK)
TrypLE
Dexamethasone
DNAse I Bovine Pancreas
DMSO
Hams F12 media
Chir 99021
L-Glutamine
L-ASCORBIC ACID (AA)
Penicillin/Streptomycin
MONOTHIOGLYCEROL (MTG)
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