Self-Assembling Amphiphilic Peptides Target the VDAC1-Hexokinase-II Complex to Induce Apoptosis in Cervical Carcinoma...

Area of Science:

• Biochemistry
• Molecular Biology
• Cancer Research

Background:

• Voltage-dependent anion channel 1 (VDAC1) is an outer mitochondrial protein overexpressed in cancers.
• VDAC1 plays a critical role in regulating apoptosis by interacting with antiapoptotic proteins and releasing apoptotic factors.

Purpose of the Study:

• To investigate novel multiblock cationic peptide amphiphiles targeting the VDAC1-Hexokinase-II complex in cervical carcinoma mitochondria.
• To evaluate the therapeutic potential of these peptides in inhibiting cervical cancer growth.

Main Methods:

• Design and synthesis of amphiphilic peptide variants with modified VDAC1 fragment LP1.
• Assessment of peptide self-assembly into nanofiber-like structures.
• Evaluation of peptide-induced apoptosis in HeLa cells, including mitochondrial membrane potential, cytochrome C release, and caspase activation.
• Testing selective cytotoxicity against cancer cells versus normal cells.

Main Results:

• The designed peptides self-assembled into nanofiber-like structures.
• Peptides triggered mitochondrial-mediated apoptosis in HeLa cells by decreasing mitochondrial membrane potential, releasing cytochrome C, and activating caspases.
• A disrupted VDAC1-Hexokinase-II interaction was suggested.
• Peptides exhibited selective cytotoxicity towards cancer cells, with minimal impact on normal 3T3 cells.

Conclusions:

• Amphiphilic peptides targeting the VDAC1-Hexokinase-II complex represent a promising mitochondria-focused therapeutic strategy for cervical cancer.
• These peptides combine self-assembly properties with enhanced apoptotic efficacy in cancer cells, suggesting potential for novel cancer therapies.