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Comparative Glycoproteomic Analysis of Mouse 4T1 Breast Cancer Model
Aik-Aun Tan1, Yin-Ling Wong2, Subash C B Gopinath3,4,5,6
1Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, , Penang, 11800, Malaysia.
Current Medicinal Chemistry
|April 30, 2025
Summary
Aberrant protein glycosylation is linked to breast cancer progression. This study identified specific glycoprotein changes in a mouse model, highlighting potential new prognostic biomarkers for early cancer detection.
Area of Science:
- Biochemistry
- Oncology
- Proteomics
Background:
- Glycosylation, a key post-translational modification, is crucial in cancer development and progression.
- Altered protein glycosylation patterns are hallmarks of malignancy, offering potential for cancer biomarker discovery.
Purpose of the Study:
- To investigate serum protein and glycoprotein alterations during breast cancer progression using a 4T1 mouse model.
- To identify potential diagnostic and prognostic biomarkers through glycoproteomic profiling.
Main Methods:
- Induction of breast tumors in BALB/c mice using 4T1 cells.
- Weekly serum collection and analysis over four weeks.
- Two-dimensional electrophoresis (2D-E) combined with lectin analysis and mass spectrometry for glycoproteomic profiling.
Main Results:
- Eight differentially expressed proteins were identified, with significant upregulation of alpha-1 protease inhibitor 2, contraption (CON), haptoglobin (HP), and kininogen-1.
- Aberrantly N-glycosylated prothrombin was detected throughout the 4-week period.
- Specific O-glycosylation patterns of alpha-2-macroglobulin, CON, HP, and alpha-2-HS-glycoprotein were observed at different time points.
Conclusions:
- The combined approach of 2D-E and lectin-based chromatography is effective for identifying breast cancer prognostic biomarkers.
- Characterizing aberrant glycosylation profiles can reveal novel insights into cancer progression and potential therapeutic targets.
