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Updated: Jul 16, 2026
Multiomics Analysis of TMEM200A as a Pan-Cancer Biomarker
Published on: September 15, 2023
Proteomic analysis of Tiam1-mediated metastasis in colorectal cancer
Li Liu1, Liang Zhao, Yanfei Zhang
1Department of Pathology, Southern Medical University, Tonghe Street, Guangzhou 510515, Guangdong, China.
Abstract:
Tiam1 (T lymphoma invasion and metastasis 1), a guanine nucleotide exchange factor that activates Rac, was recently identified as a novel colorectal cancer metastasis-related gene. To better understand the mechanism underlying Tiam1-mediated metastasis, we applied two-dimensional polyacrylamide gel electrophoresis (2-DE) and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis to identify differentially expressed proteins between Tiam1 transfected and mock transfected colorectal cancer HT29 cells. Eleven differentially expressed proteins were identified and further validated by Western blot and/or real-time PCR. The results revealed that Tiam1 transfection in colorectal cancer cells could upregulate the expression of Fascin-1, heat shock protein 27 (HSP27), high-mobility group box 1 (HMGB1), glutathione S-transferase omega 1 (GSTO1) and downregulate the expression of annexin IV. These differentially expressed proteins may be directly or indirectly regulated by Tiam1 and be helpful in studying mechanisms that lead to the function of Tiam1. These results give some clues to elucidate the mechanism of Tiam1-mediated metastasis for colorectal cancer.
Insights
Tiam1 (T lymphoma invasion and metastasis 1) influences colorectal cancer metastasis. Researchers identified key proteins, including Fascin-1 and HSP27, whose expression is altered by Tiam1, offering insights into cancer spread mechanisms.
Area of Science:
- Molecular Biology
- Oncology
- Proteomics
Background:
- Tiam1 (T lymphoma invasion and metastasis 1) is a novel colorectal cancer metastasis-related gene.
- Understanding Tiam1's mechanism in metastasis is crucial for therapeutic development.
Purpose of the Study:
- To identify differentially expressed proteins in colorectal cancer cells influenced by Tiam1.
- To elucidate the molecular mechanisms of Tiam1-mediated colorectal cancer metastasis.
Main Methods:
- Two-dimensional polyacrylamide gel electrophoresis (2-DE).
- Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS).
- Western blot and real-time PCR for validation.
Main Results:
- Eleven differentially expressed proteins were identified between Tiam1 and mock-transfected HT29 cells.
- Tiam1 upregulated Fascin-1, HSP27, HMGB1, and GSTO1.
- Tiam1 downregulated annexin IV expression.
Conclusions:
- Tiam1 significantly alters the expression of specific proteins in colorectal cancer cells.
- These proteins may be key mediators in Tiam1-driven metastasis.
- Findings provide insights into the molecular pathways of colorectal cancer progression.
