Abstract | OBJECTIVES: METHODS: We have expressed and purified recombinant forms of SCCA and leupin individually. The proteins were characterized with respect to their isoelecric points and their reactivity with the monoclonal antibody from the current tumor marker diagnostic immunoassay (IMx SCC). Reverse transcription polymerase chain reaction (RT-PCR) with gene-specific primers was used to examine expression of both genes. RESULTS: Isoelectric focusing shows that leupin is the more acidic antigen with a determined pI for recombinant leupin (rLeupin) of 6.01, with rSCCA having a pI of 6.17. The IMx SCC monoclonal antibody recognized both rSCCA and rLeupin in immunoassays and immunoblots and both genes are expressed in normal cervix and in cervical carcinoma tissue. CONCLUSIONS: The findings from this study suggest that all previous clinical studies examining SCCA expression have used methodology that detects two gene products. The confirmation that leupin or SCCA-2 is the more acidic protein and that its expression is significantly elevated in cervical cancer suggests that this gene product may be the more important tumor marker.
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Authors | R C Barnes, J Coulter, D M Worrall |
Journal | Gynecologic oncology
(Gynecol Oncol)
Vol. 78
Issue 1
Pg. 62-6
(Jul 2000)
ISSN: 0090-8258 [Print] United States |
PMID | 10873412
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright 2000 Academic Press. |
Chemical References |
- Antibodies, Monoclonal
- Antigens, Neoplasm
- Biomarkers, Tumor
- DNA Primers
- Recombinant Proteins
- Serpins
- leupin
- squamous cell carcinoma-related antigen
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Topics |
- Antibodies, Monoclonal
- Antigens, Neoplasm
(genetics, immunology)
- Biomarkers, Tumor
(analysis)
- Carcinoma, Squamous Cell
(genetics, immunology, pathology)
- DNA Primers
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Immunoassay
- Recombinant Proteins
(analysis, genetics, immunology)
- Reverse Transcriptase Polymerase Chain Reaction
- Serpins
(genetics, immunology)
- Uterine Cervical Neoplasms
(genetics, immunology, pathology)
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