[Histonet] Antigen retrieval
rschoon <@t> email.unc.edu
Mon Oct 17 08:18:29 CDT 2005
The following procedure has worked in my lab for years and has also been
published as it has been used in the publication of several articals and
reports. If the directions are followed faithfully you will have
excellent results without nonspecific background.
*_BrdU Immunohistochemistry for use with Dako Envision^(TM) HRP Kit_*
*Antibody: anti BrdU*
Figure A: *Rat Kidney, 200x.*
Catalog No.: M 0744
Ig Species: Mouse
IHC Method: Formalin - Paraffin, Frozen, Plastic GMA & MMA
Pretreatment: see method (below, 1-5)
IHC Handling: Manual
Procedure Species: all mammals
IgG Concentration: 1mg/ml
*_Specificity: Proliferating Cells of all Mammals Treated with
*_Staining Pattern: Nuclear _*
1) Hydrate slides to ddH_2 O as per SOP.
2) Hydrolyze with 4N HCl at 37^o C for 20 minutes.
3) Rinse with ddH_2 O for 1 minute at RT.
4) Transfer slides to a staining dish filled with ddH_2 O (kept at 37^o
C) for 5 minutes.
5) Incubate in pepsin solution (Dako) for 15 minutes at 37^o C.
*_All of the remaining steps are carried out at room temperature._*
6) Rinse 2X with ddH_2 O, 1 minute each rinse.
7) Rinse 2X with PBSt, 3 minutes each rinse
8) Peroxidase Blocking Reagent (Dako), 5 minute incubation.
9) Repeat step #7.
10) Primary antibody (anti-BrdU), incubate 10 minutes at a 1:200 dilution.
[5 ?L antibody to 995 ?L 1% BSA in PBS]
11) Repeat step #7.
BrdU Page 1 of
12) Polymer labeled secondary antibody (Dako Envision HRP), incubate for
13) Repeat step #7.
14) Incubate in working Dako DAB solution for 8 minutes (1 drop DAB
Chromogen per 1 ml substrate buffer).
15) Rinse well with ddH_2 O.
16) DAB enhancer solution (2.5% CoCl_2 , 2.0% NiSO_4 (NH_4 )_2 SO_4 in
ddH_2 O) for 8 minutes
17) Repeat step #15.
18) Richard Allan Hematoxylin 1 for 25 seconds, rinse with tap water
until there is no blue color in the water.
19) Let sit in tap water for 5 minutes.
20) dehydrate and coverslip in accordance with SOP's.
/_Method developed by: Robert Schoonhoven_/
/_S.O.P. Effective January 13, 2003_/
BrdU Page 2 of 2__
Steven Coakley wrote:
>Has anyone had problems with unwanted specific nuclear staining after performing heat AR especially from the microwave. I've been attempting to stain paraffin embedded rat liver in which a 24hour and 48hour BDL with Brdu injection 1 hour prior to harvest. With any form of AR, even limited 80C I get 75-100% nuclear staining. With no AR I get nothing, not even the bile ducts. Does AR tend to effect nuclear staining with some antibodies. I'm stumped.
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