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Updated: Jan 20, 2026
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Published on: September 3, 2016
Competitive inhibition by NAG-1/GDF-15 NLS peptide enhances its anti-cancer activity
Jaehak Lee1, Ilju Kim1, Eunsu Yoo1
1Laboratory of Signal Transduction, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, 08826, Republic of Korea.
Abstract:
Non-steroidal anti-inflammatory drug activated gene-1 (NAG-1), also known as growth differentiation factor 15 (GDF15), is a TGF-β (transforming growth factor beta) superfamily protein with a distinctive secretion pathway. NAG-1 is associated with multiple diseases including cancer, wherein it plays a role in both pro- and anti-cancer activities. We previously reported that NAG-1 is translocated to different subcellular compartments and its activity depends on its localization. In this paper, we report that the transfection of a novel peptide corresponding to the nuclear localization signal (NLS) of NAG-1 blocks its translocation to the nucleus. Further, accumulation of NAG-1 in the cytoplasm decreased mitochondrial membrane potential, thus implying apoptosis induction as a consequence. Overall, our results indicate that the novel peptide derived from NAG-1 NLS sequence is a promising tool for enhancing the anti-tumorigenic activity of NAG-1.
Insights
A novel peptide targeting the nuclear localization signal (NLS) of NAG-1 (Growth Differentiation Factor 15) enhances its anti-tumorigenic activity by inducing apoptosis. This peptide shows promise for cancer therapy.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Non-steroidal anti-inflammatory drug activated gene-1 (NAG-1), also known as Growth Differentiation Factor 15 (GDF15), is a TGF-β superfamily protein.
- NAG-1 exhibits dual roles in cancer, acting as both a pro- and anti-cancer agent.
- Subcellular localization of NAG-1 influences its biological activity.
Purpose of the Study:
- To investigate the effect of a novel peptide mimicking the NAG-1 nuclear localization signal (NLS).
- To determine if blocking NAG-1 nuclear translocation impacts its anti-tumorigenic potential.
- To explore the therapeutic implications of modulating NAG-1 localization.
Main Methods:
- Transfection of cells with a novel peptide corresponding to the NAG-1 NLS.
- Analysis of NAG-1 subcellular localization using cellular imaging techniques.
- Assessment of mitochondrial membrane potential to evaluate apoptosis induction.
Main Results:
- The novel NLS peptide successfully blocked the translocation of NAG-1 to the nucleus.
- Accumulation of NAG-1 in the cytoplasm led to decreased mitochondrial membrane potential.
- These cellular changes indicate the induction of apoptosis.
Conclusions:
- The novel peptide derived from the NAG-1 NLS sequence is effective in preventing nuclear translocation.
- Cytoplasmic accumulation of NAG-1, induced by the peptide, promotes apoptosis.
- This NLS-derived peptide represents a promising strategy for enhancing the anti-tumorigenic effects of NAG-1.
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