Seladin-1: A Novel Tumor Suppressor Gene Involved in Breast Cancer?
Abstract
Seladin-1 maps to the human chromosome region 1p31-1p32 that shows frequent loss of heterozygosity (LOH) in human breast tumors. Publicly available data (Entrez, GEO) also show a significant variability between levels of Seladin-1 expression in breast cancer cell lines and normal breast epithelium. Is Seladin-1 a tumor suppressor on 1p31-1p32 that is involved in breast cancer? Our concept is that it is. In order to determine if Seladin-1 is a TSG involved in breast cancer we propose to: 1) Identify possible Seladin-1 mutations in primary breast tumors. 2) Investigate the alterations of Seladin-1 expression in breast cancer cells. 3) Perform functional assays on tumor-specific Seladin-1 mutants. Accordingly, we amplified Seladin-1 exons from 40-60 breast tumor genomic DNA samples (obtained from tissue banks or commercial sources), followed by the sequence analysis of the open reading frames. As a result, no missense or nonsense mutations were detected. We found that expression of Seladin-1 significantly varies between different breast cancer cell lines, and in one such line, MDAMB- 231, is significantly below expression in normal breast epithelium.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2007
- Accession Number
- ADA477160
Entities
People
- Konstantin I. Galaktionov
Organizations
- Baylor College of Medicine