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June 2, 2008 at 11:49 am #18999
Seung Jae JeongParticipantProc. Natl. Acad. Sci. USA Vol.95, pp. 1224-1229, February 1998 Microbiology
PCR analysis of tissue samples
1. Tissue samples: the formalin-fixed samples
2. DNA Extraction from Tissues.
▶ If the samples were embedded in small paraffin blocks
A. 각 block sample을 sterile scalpel blade로 잘라서 single &thin shavings을 얻는다. 각각을 sterile 1.5-ml microcentrifuge tubes에 준비.
B. 각 tube에 xylene 1ml을 넣어 paraffin이 침투 되어있던 tissue를 extraction할 수 있다. paraffin이 용해될 때 까지 Room temp의 rocking shaker에 incubation.
C. Centrifugation at 12,000 X g, 2min, solvent를 제거하고 pellet을 얻는다.
☞여전히 paraffin이 남아있으면 xylene extraction을 되풀이한다.
D. 0.5ml ice-cold 100% ethyl alcohol로 inverting하여 wash.
E. 2min, 12,000X g centrifugation. Ethyl alcohol을 제거한다
F 10㎕ acetone으로 pellets을 suspension.
G. 55 0C에서 air-dry시켜준다
H. Dried samples을 150 ㎕ freshly prepared solution에 suspension하여 370C에서 overnight incubation시킨다.
I. 15sec, 12,000Xg centrifugation.
J. Supernant를 950C, 10min incubation.(proteinase를 inactivation)
K. 2min, 12,000Xg centrifugation.
L. Supernant를 -200C에 보관
▶If the samples were just fixed with formalin
D. tissue를 D.W로 wash해준다.
E. Kidney, liver같은 whole Tissue는 잘게 잘라준다.
F. 0.5ml ice-cold 100% ethyl alcohol로10min 정도 inverting하여 wash.
G. 5min, 12,000X g centrifugation. Ethyl alcohol을 제거한다.
H. 200㎕ acetone으로 pellets을 suspension.
I. 55 0C에서 air-dry시켜준다.
J. Dried samples을 200 ㎕ freshly prepared solution에 suspension하여 370C에서 overnight incubation시킨다.
Solution preparation
Components
Stock
200㎕
50mM Tris-HCl(pH8.5)
1M (pH8.5)
10㎕
1mM EDTA
0.2M
1㎕
0.1% Tween-20
10%(40C,2ndAb box에)
2㎕
Proteinase K (20mg/ml)
10mg/ml
200㎕
K. 15sec,12,000Xg centrifugation.
L. Supernant를 950C, 10min incubation.(proteinase를 inactivation)
M.5min,12,000Xg centrifugation.
N.Supernant를 -200C에 보관
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