[안영하] Immunocytochemistry_by_박광록

This topic has 0 replies, 1 voice, and was last updated 16 years, 7 months ago by Seung Jae Jeong.

  • Author
    Posts
    • #19002

      Seung Jae Jeong
      Participant

      Immunocytochemistry

                     

      1.      Prepare the block of tissue or embryo: cryo-section prep.

      A.    Fix tissue or embryo in 4% paraformaldehyde at 40C for 2hrs or O/N.

      4% paraformaldehyde 녹기 때문에 NaOH 2~3방울(적당량) 넣어 녹여준다.  조직을 4% paraformaldehyde incubation하는 time 조직의 크기를 봐서 결정해야 한다. 15day embryo 경우는 O/N, 보통은 2~4hr정도 incubation해준다. 너무 오래 담그면 조직이 굳기 때문에 주의.

      B.     Incubate in 30%sucrose in PBS at 40C for 1.5~4hrs

                  Sucrose 조직내의 물을 빼주고 OCT 침투하도록 해준다. 너무 오래 두면 조직이 변형되므로, 4hr 넘기면안 된다.

      C.    Cover the tissue or embryo with OCT compound: Miles thoroughly and store at -800C

      OCT 기포가 들어가도록주의

      2.      frozen tissue section

      3.      Make the coating slide …..그냥 사서 하는 낫지..

      1)      sink in aceton

      2)      Sink in 0.02%(v/v) Vectabond reagent (Vector laboratories)/ aceton for 5min

      3)      Sink in DEPC D.W

      4)       Dry at 500C

      4.        Reaction :HRP 방법을 (AP방법을 때는 다른 blocking regents 써준다.)

      1)      Bleached with 5% H2O2 for 10min to block endogenous peroxidase (in case of HRP)

      원래 protocol에는 4hr처리이나 , 4hr 이상 처리하면 기포에 의해서 조직이 떨어져나감.

      2)      Incubated in PBSTM for 2hr at R.T…. Blocking

      Triton :0. 1%, skim milk: 1%, with PBS

                   first Ab 따라 skim milk 넣는 조금씩 다르다. 4 0C에서 하는 보다 R.T에서 하는 효과적.

      3)      Treated with 10ug/ml of Ab in PBSTM at 40C for O/N

      때는 skim milk 있다. 40C에서 skim milk 침전되면 별로 좋으니까.

      1st Ab 상온에서 2hr 이상, 40C에서 O/N 주어야 . 오래 주는 좋다.

      4)      Washed with PBSTM for 20min, 5times at R.T.

      Skim milk 주는   background 낮게 해주겠지.

      5)      Treated anti-2nd antibody at 40C for O/N.

      상온에서 2hr 정도로도 Ok !.

      6)      Repeat step 4)

      7)      Color reaction with 3mg/ml 3 3’ diaminobenzen zidine, 0.5% NiCl2, 0.03% H2O2  in PBS.

      DAP(DAKO) 0.5% NiCl2 넣어서 사용.

      Option으로 eosin 처리하면, Smooth muscle cell purple staining되고 , PECAM brown으로 staining.

      l  DAP, DAKO pen, pharmingen 1st Ab.

       

       

      Whole mount immunohistostaining

        

          The Journal of Histochemistry & Cytochemistry 45(6): 883-893, 1997

       

      1.      Prefixed in 0.1M phosphate buffer

      2.      Incubated in fixing sol.(methanol :dimethyl sulfoxide =4:1) for 2hrs to O/N

      3.      Bleached (methanol :dimethylsulfoxide:30% H2O2 =4:1:1) for 2hr at R.T

      100% MetOH에서 영구히 보존됨.

      4.      80%à50à30% methanol with PBS hydration.

      5.      Blocked by incubating twice in PBSMT containing 1% normal goat serum and 0.2% BSA for 1hour at R.T                                                

                                                  ( 2nd Ab 따라서 결정 )            

      6.      Incubated with PBS MT containing 1st Ab (0.5ug/ml) O/N

      7.      Washed five times in PBSMT each for 1hr at 4 0C for the initial three washes and at R.T for the final two.

      8.      Developed by incubating 1ug/ml HRP-conjugated Ab O/N at 40C.

      9.      Washed with more than five exchanged of PBSMT including the final 20min wash n PBST at R.T

      Skim milk 들어가면 staining 깨끗이 안되므로 마지막 wash때는 넣어준다.

      10.  Soaked in PBST containing 0.05% NiCl2 and 250ug/ml diaminobensidine for 10`30min and hydrogen peroxide was added to 0.01%

          250ug/ml diaminobensidine대신 DAP사용.

      11.  Rinsed three or four times in PBST

      가볍게 dipping해서 rinse 하는 정도. 

      12.  Dehydrated in 100% methanol and stored at -200C until photographed.

      30%à50%à80%à100% methanol with PBS dehydration.

       

       

       

       

       

       

       

       

       

       

       

       

       

       

      Immunoassaying

      By

      I.                   –700C 있던 slide R.T 3min 두면, OCT compound 녹는다.

      II.                PBS washing 5min, 3times.

      III.             3% H2O2 with PBS —-10min 처리

      R.T에서 tissue위에 3% H2O2 연속 처리 후에 10min standing .

      Endogenous peroxidase inactivation시켜줌. 거품 발생.

      IV.              PBS washing 5min, 3times

      V.                 20mg/ml PK 1/1000 dilution해서 370C에서 5min incubation.

      VI.              PBS washing 5min, 3times

      VII.           Blocking (3% BSA or skim milk with PBS), 20min

      VIII.        PBS washing해주기

      IX.               Primary Ab 처리.R.T, 2hrs.

      Reaction ice위에서 해주고 0.2mg/ml Ab stock 1/50(~1/500)으로 dilution해서 사용. With PBS.

      Para film으로 밀봉해서 dry되지 않도록 한다.

      X.                 PBS washing 5min, 3times.

      XI.               secondary Ab 처리.  30min, R.T.

      biotin 달려있는 Ab 사용. 농도는 보통 1:500.

      XII.           PBS washig, 5min, 3times

      XIII.        Streptavidin Peroxidase (1:500?)처리. 10min, R.T

      (HRP)-àDAKO.

      XIV.        PBS washing 5min, 3times.

      XV.           DAB 처리 10min, dark condition

      Imidazole buffer( H2O2 포함.) 1ml

      Chromogen (color reaction)  방울.

      XVI.   Running water washing. àPBS washing àD.W washing.

       

      àHematoxylin & eosin staining.

      1.      Hematoxylin staining ( 염색). 1min

      2.      running water washing —àPBS washing—à running water washing

      3.      mounting

      http://www.vectorlabs.com/index.htm

       

       

Viewing 0 reply threads

You must be logged in to reply to this topic.

CONTACT US

We're not around right now. But you can send us an email and we'll get back to you, asap.

Sending

©2010-2024 Medicinal Bioconvergence Research Center. All rights reserved.

Log in with your credentials

Forgot your details?