1. Secretion of N- and O-linked Glycoproteins from 4T1 Murine Mammary Carcinoma Cells.
- Author
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Phang WM, Tan AA, Gopinath SC, Hashim OH, Kiew LV, and Chen Y
- Subjects
- Animals, Cadherins metabolism, Cell Line, Cell Line, Tumor, Electrophoresis, Gel, Two-Dimensional, Eye Proteins metabolism, Female, Gene Products, gag metabolism, Matrix Metalloproteinase 13 metabolism, Mice, Nerve Growth Factors metabolism, Proteomics, Serpins metabolism, Viral Envelope Proteins metabolism, Glycoproteins metabolism, Mammary Neoplasms, Animal metabolism
- Abstract
Breast cancer is one of the most common cancers that affect women globally and accounts for ~23% of all cancers diagnosed in women. Breast cancer is also one of the leading causes of death primarily due to late stage diagnoses and a lack of effective treatments. Therefore, discovering protein expression biomarkers is mandatory for early detection and thus, critical for successful therapy. Two-dimensional electrophoresis (2D-E) coupled with lectin-based analysis followed by mass spectrometry were applied to identify potential biomarkers in the secretions of a murine mammary carcinoma cell line. Comparisons of the protein profiles of the murine 4T1 mammary carcinoma cell line and a normal murine MM3MG mammary cell line indicated that cadherin-1 (CDH), collagenase 3 (MMP-13), Viral envelope protein G7e (VEP), Gag protein (GAG) and Hypothetical protein LOC433182 (LOC) were uniquely expressed by the 4T1 cells, and pigment epithelium-derived factor (PEDF) was exclusively secreted by the MM3MG cells. Further analysis by a lectin-based study revealed that aberrant O-glycosylated CDH, N-glycosylated MMP-13 and LOC were present in the 4T1 medium. These differentially expressed N- and O-linked glycoprotein candidates, which were identified by combining lectin-based analysis with 2D-E, could serve as potential diagnostic and prognostic markers for breast cancer.
- Published
- 2016
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