What is it about?
This review looks at how e-cigarette exposure may affect mitochondria, the small structures inside cells that help produce energy. Many studies on vaping report different effects: oxidative stress, inflammation, DNA damage, metabolic changes, and cell injury. This review brings those findings together and asks whether mitochondria may be one of the main places where these effects converge. Mitochondria are especially vulnerable because they generate energy while also sitting close to reactive oxygen species. When e-cigarette aerosol constituents disturb mitochondrial function, cells may produce less energy, generate more oxidative stress, damage mitochondrial DNA, lose membrane stability, and trigger inflammatory or cell-death pathways. The review also highlights that these effects are not only about nicotine. Flavoring chemicals, aldehydes formed during heating, and metals from device components may also contribute to mitochondrial stress.
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Why is it important?
Mitochondria help decide whether cells adapt, recover, or move toward injury. That makes them important for understanding why vaping may affect several organs, including the lungs, heart, brain, reproductive system, and metabolic tissues. This review is important because it connects scattered findings into one clearer idea: different e-cigarette chemicals may act through a shared mitochondrial stress pathway. That does not mean every exposure causes the same effect. Device type, flavoring chemistry, nicotine level, heating temperature, exposure duration, and biological context all matter. But if mitochondria are repeatedly stressed, the result may be reduced energy production, more oxidative damage, inflammation, and impaired tissue function. The field still needs stronger long-term human data, but the existing experimental evidence supports taking mitochondrial injury seriously as a central mechanism in e-cigarette toxicity.
Perspectives
This paper was written to bring together findings that often appear disconnected in the vaping literature. By focusing on mitochondria, we highlight a potential common mechanism linking oxidative stress, inflammation, metabolic disruption, and cellular injury caused by e-cigarette exposure. In my view, understanding how mitochondrial function responds to vaping may help explain a wide range of health effects and encourage future studies to directly measure mitochondrial changes in real-world exposure settings and human populations.
Ardie Barry Sailis
University of Malaya
Read the Original
This page is a summary of: Mitochondrial dysfunction induced by E-cigarettes, Toxicology, January 2026, Elsevier,
DOI: 10.1016/j.tox.2025.154339.
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