Redox sensor CtBP mediates hypoxia-induced tumor cell migration.
basic_science · Level V
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- Record sourced from PubMed, PMID 16740659.
- Also identified by PMC identifier 1482560.
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Abstract
The rapid growth and poor vascularization of solid tumors expose cancer cells to hypoxia, which promotes the metastatic phenotype by reducing intercellular adhesion and increasing cell motility and invasiveness. In this study, we found that hypoxia increased free NADH levels in cancer cells, promoting CtBP recruitment to the E-cadherin promoter. This effect was blocked by pyruvate, which prevents the NADH increase. Furthermore, hypoxia repressed E-cadherin gene expression and increased tumor cell migration, effects that were blocked by CtBP knockdown. We propose that CtBP senses levels of free NADH to control expression of cell adhesion genes, thereby promoting tumor cell migration under hypoxic stress.
Medical subject headings
- Biosensing Techniques
- Cell Movement
- DNA-Binding Proteins
- Hypoxia
- Phosphoproteins
- Repressor Proteins
- Tumor Cells, Cultured