Characterization of a Monoclonal Antibody Specific to Human Siah-1 Interacting Protein.
- Author:
Sun Young YOON
1
;
Joung Hyuck JOO
;
Joo Heon KIM
;
Ho Bum KANG
;
Jin Sook KIM
;
Younghee LEE
;
Do Hwan KWON
;
Chang Nam KIM
;
In Seong CHOE
;
Jae Wha KIM
Author Information
- Publication Type:Original Article
- Keywords: Siah-1 interacting protein(SIP); S100A6; monoclonal antibody; colorectal cancer
- MeSH: Animals; Antibodies, Monoclonal; beta Catenin; Carcinogenesis; Cell Proliferation; Clinical Coding; Clone Cells; Colon; Colorectal Neoplasms; Diagnosis; DNA, Complementary; Ecthyma, Contagious; Enzyme-Linked Immunosorbent Assay; Humans*; Mice; Sensitivity and Specificity
- From:Immune Network 2004;4(1):23-30
- CountryRepublic of Korea
- Language:Korean
- Abstract: BACKGROUND: A human orthologue of mouse S100A6-binding protein (CacyBP), Siah- 1-interacting protein (SIP) had been shown to be a component of novel ubiquitinylation pathway regulating beta-catenin degradation. The role of the protein seems to be important in cell proliferation and cancer evolution but the expression pattern of SIP in actively dividing cancer tissues has not been known. For the elucidation of the role of SIP protein in carcinogenesis, it is essential to produce monoclonal antibodies specific to the protein. METHODS: cDNA sequence coding for ORF region of human SIP gene was amplified and cloned into an expression vector to produce His-tag fusion protein. Recombinant SIP protein and monoclonal antibody to the protein were produced. The N-terminal specificity of anti-SIP monoclonal antibody was conformed by immunoblot analysis and enzyme linked immunosorbent assay (ELISA). To study the relation between SIP and colon carcinogenesis, the presence of SIP protein in colon carcinoma tissues was visualized by immunostaining using the monoclonal antibody produced in this study. RESULTS: His-tag-SIP (NSIP) recombinant protein was produced and purified. A monoclonal antibody (Korea patent pending; #2003-45296) to the protein was produced and employed to analyze the expression pattern of SIP in colon carcinoma tissues. CONCLUSION: The data suggested that anti-SIP monoclonal antibody produced here was valuable for the diagnosis of colon carcinoma and elucidation of the mechanism of colon carcinogenesis.
