CEA-related cell adhesion molecules (CEACAM) belong to the carcinoembryonic antigen (CEA) family. It consists of seven CEACAM (CEACAM 1, CEACAM 3-CEACAM 8) and 11 pregnancy-specific glyco-protein (PSG 1-PSG 11) members. The CEA family proteins belong to the immunoglobulin (Ig) superfamily and are composed of one Ig variable-like (IgV) and a varying number (0-6) of Ig constant-like (IgC) domains. CEACAM molecules are membrane-bound either via a transmembrane domain or a glycosyl phosphatidyl inositol (GPI) anchor. CEACAM molecules are differentially expressed in epithelial cells or in leucocytes. Over-expression of CEA/ CEACAM 5 in tumors of epithelial origin is the basis of its wide-spread use as a tumor marker. The function of CEACAM family members varies widely: they function as cell adhesion molecules, tumor suppressors, regulators of lymphocyte and dendritic cell activation, receptors of Neisseria species and other bacteria.
Function:
Cell surface glycoprotein that plays a role in cell adhesion and in intracellular signaling. Receptor for E.coli Dr adhesins.
Subunit:
Homodimer. Binding of E.coli Dr adhesins leads to dissociation of the homodimer.
Subcellular Location:
Cell membrane; Lipid-anchor, GPI-anchor
Tissue Specificity:
Found in adenocarcinomas of endodermally derived digestive system epithelium and fetal colon.
Post-translational modifications:
Complex immunoreactive glycoprotein with a MW of 36 kDa comprising 60% carbohydrate.
Similarity:
Belongs to the immunoglobulin superfamily. CEA family.
Contains 7 Ig-like (immunoglobulin-like) domains.
SWISS:
P40199
Gene ID:
4136
Database links:
Entrez Gene: 4136 Human
Entrez Gene: 100125369 Rat
Omim: 16796 Human
SwissProt: P40199 Human
Unigene: 466814 Human
Unigene: 122781 Rat
CEA是一种胚胎性抗原，主要存在于胎儿消化道上皮组织，胰腺和肝癌中。CEA广泛存在各种上皮性肿瘤，尤其是胃肠道恶性肿瘤，CEA分布阳性类型与肿瘤的恶性度有关。CEA与EMA一样可作为上皮性恶性肿瘤的重要标记。
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Sample: SW96 Cell Lysate at 40 ug
Primary: Anti- CEA(SL0060R) at 1/300 dilution
Secondary: IRDye800CW Goat Anti-Rabbit IgG at 1/10000 dilution
Predicted band size: 71 kD
Observed band size: 71 kD
Paraformaldehyde-fixed, paraffin embedded (rat heart); Antigen retrieval by boiling in sodium citrate buffer (pH6.0) for 15min; Block endogenous peroxidase by 3% hydrogen peroxide for 20 minutes; Blocking buffer (normal goat serum) at 37°C for 30min; Antibody incubation with (ADRAIA) Polyclonal Antibody, Unconjugated (SL0060R) at 1:400 overnight at 4°C, followed by a conjugated secondary (sp-0023) for 20 minutes and DAB staining.
Tissue/cell: human lung carcinoma; 4% Paraformaldehyde-fixed and paraffin-embedded;
Antigen retrieval: citrate buffer ( 0.01M, pH 6.0 ), Boiling bathing for 15min; Block endogenous peroxidase by 3% Hydrogen peroxide for 30min; Blocking buffer (normal goat serum,SLC0005) at 37℃ for 20 min;
Incubation: Anti-CEA/CD66e/CEACAM5 Polyclonal Antibody, Unconjugated(SL0060R) 1:200, overnight at 4°C, followed by conjugation to the secondary antibody(SP-0023) and DAB(SLC0010) staining
Blank control (blue line): MCF7 (blue).
Primary Antibody (green line): Rabbit Anti-CEA antibody (SL0060R)
Dilution: 0.2μg /10^6 cells;
Isotype Control Antibody (orange line): Rabbit IgG .
Secondary Antibody (white blue line): Goat anti-rabbit IgG-PE
Dilution: 1μg /test.
Protocol
The cells were fixed with 70% methanol overnight at 4℃ . Cells stained with Primary Antibody for 30 min at room temperature. The cells were then incubated in 1 X PBS/2%BSA/10% goat serum to block non-specific protein-protein interactions followed by the antibody for 15 min at room temperature. The secondary antibody used for 40 min at room temperature. Acquisition of 20,000 events was performed.
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