VDAC1: from structure to cancer therapy.

Area of Science:

• Mitochondrial biology
• Cancer cell metabolism
• Apoptosis regulation

Background:

• Voltage-dependent anion channel 1 (VDAC1) is located on the outer mitochondrial membrane.
• VDAC1 controls metabolic exchange between mitochondria and the cytosol.
• It integrates mitochondrial functions with cellular activities.

Purpose of the Study:

• To review evidence on VDAC1's role in cell life and death, particularly in cancer.
• To highlight VDAC1's function as a metabolite transporter contributing to cancer's metabolic phenotype.
• To discuss VDAC1's involvement in apoptosis and its potential as a therapeutic target.

Main Methods:

• Review of current scientific literature on VDAC1 function.
• Analysis of VDAC1's role in metabolic cross-talk and apoptosis.
• Discussion of VDAC1's interactions with cancer-associated proteins like hexokinase (HK), Bcl2, and Bcl-xL.
• Evaluation of VDAC1-based peptides in cancer cell lines.

Main Results:

• VDAC1 is over-expressed in many cancers, and its silencing inhibits tumor growth.
• VDAC1 participates in the release of apoptotic proteins and interacts with anti-apoptotic proteins.
• VDAC1 oligomerization is critical for apoptosis induction.
• VDAC1 serves as an anchor for proteins like HK, Bcl2, and Bcl-xL, conferring proliferative and chemoresistance advantages to cancer cells.
• VDAC1-based peptides targeting HK, Bcl2, or Bcl-xL promote cancer cell death.

Conclusions:

• VDAC1 plays a multifaceted role in cancer cell survival, metabolism, and apoptosis resistance.
• Targeting VDAC1 and its interactions with proteins like HK, Bcl2, and Bcl-xL is a promising strategy for novel cancer therapeutics.
• VDAC1-based peptides demonstrate potential in overcoming apoptotic evasion in cancer cells.