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Carcinoembryonic Antigen (CEA) Antibody Staining Protocol for Immunohistochemistry
Description: Carcinoembryonic Antigen (CEA) is an antigen (protein) present in very small quantities in adult tissue. A greater than normal amount may be suggestive of cancer. CEA is therefore called a tumor marker. Tests for its presence aid in screening, in evaluating recurrent or disseminated disease, and in gauging the success of surgical removal of malignant tumors.
Primary Antibody
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Name: CEA (Carcinoembryonic Antigen) Antibody |
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Clone: II-7, Mouse anti-Human |
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Supplier: Dako |
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Catalog Number: M7072 |
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Dilution: 1:400 using IHC-TekTM Antibody Diluent (Cat# IW-1000 or IW-1001) to reduce background and unspecific staining and serum blocking step is NOT needed. |
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Incubation Time/Temp: 60 min/room temperature |
Antigen Retrieval
| Device: IHC-TekTM Epitope Retrieval Steamer Set (Cat# IW-1102) |
| Buffer/pH value: IHC-TekTM Epitope Retrieval Solution (Cat# IW-1100) |
| Heat/Cool Temperature: 95-100 ºC/room temperature |
| Heat/Cool Time: 20 minutes/20 minutes |
Detection Methods
| Standard Method: ABC Method or LSAB Method |
| Enhanced Method: Polymeric Methods |
Chromogen Substrate
| Reagent: DAB |
| Incubation Time/Temperature: 1-3 minutes/room temperature |
Counterstain
| Reagent: Gill's Hematoxylin or Mayer's Hematoxylin |
| Staining Time: 30 seconds |
Results:
| Staining Pattern: Cytoplasmic |
| Images: Search image |
Additional Information:
| Tissue Type: Colon adenocarcinoma, breast carcinoma |
| Fixation: Formalin fixed paraffin sections, or acetone fixed frozen sections |
| Positive Control: Colon adenocarcinoma, breast carcinoma |
| Negative Control: Omit primary antibody, isotype control, absorption control |
| Blocking: 2-5% normal serum to reduce unspecific background staining; 0.5-3% H2O2 to block endogenous peroxidase activity; avidin/biotin to block endogenous biotin activity if necessary |
Notes:
Not need to perform antigen retrieval for acetone fixed frozen sections |
References: