Independent and sensory human mitochondrial functions reflecting symbiotic evolution

Area of Science:

• Cell Biology
• Evolutionary Biology
• Microbiology

Background:

• Mitochondria, accepted as originating from bacteria ~1.45 billion years ago, are traditionally viewed as fully cell-dependent organelles.
• This perspective has historically limited the understanding of their complex biological roles.

Purpose of the Study:

• To challenge the traditional view of mitochondria as solely cell-dependent organelles.
• To propose a new perspective of mitochondria as functionally independent entities based on recent evidence.

Main Methods:

• Review of recent scientific literature and studies on mitochondrial behavior.
• Analysis of evidence for mitochondria functioning outside cells.
• Examination of studies on mitochondrial intercellular and inter-organismal communication.

Main Results:

• Mitochondria demonstrate functional independence, capable of operating outside host cells.
• They engage in complex "social" interactions and communication with cellular components, bacteria, and viruses.
• Mitochondria exhibit coordinated movement and organization, similar to bacterial quorum sensing.

Conclusions:

• Mitochondria should be re-evaluated as more functionally independent entities.
• This new perspective may unlock novel insights into mitochondrial functions.
• It could inform new therapeutic strategies for diseases linked to mitochondrial dysfunction.