Livers of 1-year-old male Wistar rats (450-500 g body mass, Interfauna), fed ad libitum on a stock diet, were perfused first with a Ca2+/Mg2+-free solution (137 mM NaCl, 5.4 mM KCl, 0.6 mM NaH2P04 . 2H20, 0.8 mM NaHPO4.12H20, 10 mM Hepes, 0.5 mM EGTA, 4.2 mM NaHCO3, and 5 mM glucose, pH 7.4) for 10 min at 37°C and next with 0.05% collagenase solution (137 mM NaC1, 5.4 mM KC1, 0.6mM NaH2PO4.2H20, 0.8mM Na2HPO4.12H20, 3.8mM CaCl2, 10mM Hepes, 4.2mM NaHCO3 and 500 mg/l collagenase, pH 7.4) for 30 min at 37°C. The flow rate was 10ml/min. The digested liver was excised, dispersed in Ca2+/Mg2+-free solution and filtered through gauzes. Residual hepatocytes were removed twice by a low-speed centrifugation (50 g, 4"C, 2 min). The non-parenchy-ma1 cells were pelleted by centrifugation (450 g, 4"C, 10 min). A stellate-cell-enriched fraction was obtained by the use of centrifugation with a triple-layered (9, 11, 17%) Nycodenz cushion (1400 g, 4"C, 20 min). The cells in the upper layer were washed by centrifugation (450g, 4"C, 10min) and suspended in DMEM (GIBCO) supplemented with 10% fetal-calf serum (Boehringer Mannheim) and antibiotics (105U/1 penicillin G, 100 mg/l streptomycin, and 2.5 mg/l amphotericin . After plating, the culture medium was changed every other day.
1. The portal vein with solution I for 5 min at 37°C at a flow rate of 7 ml/min. (35ml)
2. Each liver was then perfused solution II for 10 min at 37°C at flow rate of 7 ml/min.(70ml)
3. The liver was excised and incubated in digest solution (30ml) at 37°C for 20 min with gentle stirring.
4. Stop digestion with 10% FBS(+)EMEM 15ml
5. The incubating mixture was filtered through a mesh (pore size: 70 mm).
6. The filtrate was centrifuged at 450 g for 7 min.
7. The cell pellet was then resuspended in 5 mL of 15% OptiPrep, and loaded carefully with 5 mL of 11.5% OptiPrep, and centrifuged at 1400g for 17 min at 4°C.
8. The cell fraction in the upper layer of 11.5% OptiPrep was gently aspirated, mixed with GBSS (5ml), and centrifuged at 1400g for 10 min at 4°C.
9. the cell pellet resuspend in GBSS and was centrifuged at 450 g for 7 min
10. cell pellet was resuspended in DMEM supplemented with 10% FBS and antibiotics (105 U/l penicillin G, 100 mg/l streptomycin) 2ml
11. cultured on 24 wells plastic plates at 37°C in an incubator (5% CO2/95% air).
The purity of the cultures was evaluated by examining the characteristic stellate shape of the cells with phase-contrast microscopy and by the presence of lipid droplets by autofluorescence using an excitation light of 320 nm 作者: zzzz 时间: 2012-5-18 17:58
Solution I
137 mM NaCl 8 g
5.4 mM KCl 0.402 g
0.6 mM NaH2PO4.2H2O 0.0936 g
0.8 mM Na2HPO4.12H2O 0.2865 g
10 mM HEPES 2.383 g
0.5 mM EGTA 0.190 g
4.2 mM NaHCO3 0.3528 g
5 mM glucose 0.901 g
pH 7.4
Total 1L
Solution II
137 mM NaCl 8 g
5.4 mM KCl 0.402 g
0.6 mM NaH2PO4.2H2O 0.0936 g
0.8 mM Na2HPO4.12H2O 0.2865 g
10 mM HEPES 2.383 g
3.8 mM CaCl2.2H2O 0.5586 g
4.2 mM NaHCO3 0.3528 g
5 mM glucose 0.901 g
180 mg/l collagenase type I (使用前加,现配)
pH 7.4
Total 1L
Digest solution
solution II containing 400 mg/l pronase and 20 mg/l DNase (使用前加,现配)
GBSS
NaCl, 7 g
KCl 370 mg
Na2HPO4 .2H2O 150 mg
KH2PO4 30 mg
MgCl2.6H20 376.8 mg
CaCl2.2H2O 225 mg
glucose 1 g
NaHCO3 2.27 g
Total 1 L作者: pencil菲 时间: 2012-5-18 17:59
I will isolute HSCs.In the literatruesolation and Culture of Hepatic Stellate Cells(Ralf Weiskirchen and Axel M. Gressner),Collagenase H (0.23 U/mg) means 0.23u collagenase I to 1mg liver tissue.
thanks作者: shenkunjie 时间: 2012-5-18 18:17
for isolution of HSCs,Do you had centrifugated total liver cell suspension with percoll gradient?作者: shenkunjie 时间: 2012-5-18 18:17
solution I Is D-hanks?Solution II is Hanks?作者: lagua123 时间: 2012-5-18 18:18