Dual-targeting pro-apoptotic peptide for programmed cancer cell death via specific mitochondria damage

Area of Science:

• Biochemistry
• Cell Biology
• Oncology

Background:

• Mitochondria are essential for eukaryotic cell survival.
• Mitochondrial damage can lead to irreversible cell death or apoptosis.
• Targeting cancer cell mitochondria offers a strategy for programmed cancer cell death.

Purpose of the Study:

• To design a pro-apoptotic peptide for targeted cancer cell death.
• To investigate a dual-targeting strategy for enhanced delivery to cancer cell mitochondria.
• To induce cancer cell apoptosis via specific mitochondrial damage.

Main Methods:

• Functionalized a pro-apoptotic peptide with folic acid (FA) and triphenylphosphonium (TPP) cation.
• Utilized FA for receptor-mediated endocytosis to increase cancer cell uptake.
• Employed TPP cation for specific delivery of the peptide to mitochondria within cancer cells.

Main Results:

• The dual-targeting peptide effectively accumulated in cancer cell mitochondria.
• Significant mitochondrial damage was induced by the accumulated peptide.
• Mitochondrial dysfunction triggered mitochondria-dependent apoptosis in targeted cancer cells.

Conclusions:

• The dual-targeting strategy shows potential for efficient delivery of pro-apoptotic peptides to cancer cell mitochondria.
• This approach can effectively eliminate cancer cells by inducing mitochondrial dysfunction and apoptosis.
• Targeted mitochondrial damage represents a promising therapeutic strategy for cancer treatment.