Intercellular mitochondrial exchange shapes tumor evolution, microenvironment adaptation, and therapeutic...

Area of Science:

• Mitochondrial biology
• Cancer cell communication
• Tumor microenvironment

Background:

• Mitochondria play crucial roles in cell energy and signaling.
• Mitochondrial transfer between cells is an underappreciated intercellular communication mechanism.
• Mitochondrial exchange impacts recipient cell metabolism, stress tolerance, and therapy response.

Purpose of the Study:

• To synthesize evidence on mitochondrial exchange mechanisms in cancer.
• To identify regulatory factors and microenvironmental triggers of mitochondrial transfer.
• To discuss methodological standards for studying mitochondrial transfer.

Main Methods:

• Review of current literature on mitochondrial transfer routes.
• Analysis of regulatory "gatekeepers" and microenvironmental factors.
• Evaluation of methods for validating organelle transfer.

Main Results:

• Mitochondrial transfer occurs via tunneling nanotubes, extracellular vesicles, and contact-dependent methods.
• Transfer influences tumor cell metabolic plasticity, oxidative stress buffering, and immune evasion.
• Key regulators include actin-based conduits, motor proteins, and EV dynamics.
• Hypoxia and redox stress are identified as microenvironmental triggers.

Conclusions:

• Mitochondrial transfer is a significant factor in tumor biology and therapy resistance.
• Targeting mitochondrial exchange offers potential for novel cancer treatment strategies.
• Standardized methods are needed to ensure rigorous study of mitochondrial transfer.