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Published on: September 16, 2019
MNT inhibits the migration of human hepatocellular carcinoma SMMC7721 cells
Jian Wu1, Qi Zhou, Yafeng Wang
1Department of Hepatobiliary Surgery, The First Affiliated Hospital, Sun Yat-sen University, 58 ZhongShan 2nd Road, Guangzhou, Guangdong 510080, China.
Abstract:
Max binding protein (MNT) is a member of the Myc/Max/Mad network that plays a role in cell proliferation, differentiation and apoptosis. We previously observed that MNT was differentially expressed in hepatocellular carcinoma (HCC) and interacted with Nck1 by 2-DE. Nck family adaptor proteins function to couple tyrosine phosphorylation signals, regulate actin cytoskeletal reorganization and lead to cell motility. In order to investigate the regulatory role of MNT in HCC migration, we used transient transfection with a MNT expressing vector to overexpress MNT protein in SMMC7721 cells, and MNT siRNA to knockdown MNT expression. Rho Family Small GTPase activation assay, Western blots and transwell assay were used to determine the migration potential of cells. We found that knockdown of MNT expression might promote SMMC7721 cell migration, while the overexpressed MNT could significantly inhibit cell migration. It further emphasized the role of MNT in inhibition of cell migration that might be a promising target for HCC chemotherapy.
Insights
Max binding protein (MNT) regulates hepatocellular carcinoma (HCC) cell migration. MNT overexpression inhibited migration, while knockdown promoted it, suggesting MNT as a potential therapeutic target for HCC.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Max binding protein (MNT) is part of the Myc/Max/Mad network, influencing cell proliferation, differentiation, and apoptosis.
- MNT is differentially expressed in hepatocellular carcinoma (HCC) and interacts with Nck1, a protein involved in cell motility.
- Nck family adaptor proteins link tyrosine phosphorylation signals to actin cytoskeletal reorganization, impacting cell movement.
Purpose of the Study:
- To investigate the regulatory role of Max binding protein (MNT) in hepatocellular carcinoma (HCC) cell migration.
- To determine how MNT expression levels affect the migratory potential of SMMC7721 HCC cells.
Main Methods:
- Overexpression of MNT protein in SMMC7721 cells using transient transfection with a MNT expressing vector.
- Knockdown of MNT expression in SMMC7721 cells using MNT siRNA.
- Assessment of cell migration potential using Rho Family Small GTPase activation assay, Western blots, and transwell assays.
Main Results:
- Knockdown of MNT expression was observed to promote SMMC7721 cell migration.
- Overexpression of MNT protein significantly inhibited SMMC7721 cell migration.
- These findings highlight MNT's role in regulating HCC cell motility.
Conclusions:
- Max binding protein (MNT) plays an inhibitory role in hepatocellular carcinoma (HCC) cell migration.
- MNT's function in suppressing cell migration suggests it could be a promising therapeutic target for HCC chemotherapy.
