Short-Term E-Cigarette Exposure Increases the Risk of Thrombogenesis and Enhances Platelet Function in Mice

Area of Science:

• Cardiovascular Science
• Hematology
• Toxicology

Background:

• Cardiovascular disease is a leading cause of death in the US, with smoking as a primary preventable cause.
• Electronic cigarette (e-cigarette) use has risen significantly, despite limited research on their cardiovascular effects.
• Thrombosis is a key mechanism of cardiovascular mortality in smokers, prompting investigation into e-cigarette impacts.

Purpose of the Study:

• To investigate the effects of e-cigarette exposure on platelet function and thrombogenesis.
• To compare e-cigarette exposure to clean air exposure in a mouse model.
• To assess the potential cardiovascular risks associated with e-cigarette use.

Main Methods:

• Utilized a passive e-Vape vapor inhalation system for whole-body mouse exposure.
• Developed an in vivo protocol mimicking real-life human e-cigarette exposure scenarios.
• Analyzed platelet function, aggregation, secretion, integrin activation, and signaling pathways.

Main Results:

• E-cigarette-exposed platelets showed hyperactivity, including enhanced aggregation and secretion.
• Increased activation of αIIbβ3 integrin, phosphatidylserine expression, and Akt/ERK signaling was observed.
• E-cigarette-exposed platelets were resistant to prostacyclin inhibition, and mice had shortened thrombosis and bleeding times.

Conclusions:

• E-cigarettes alter physiological hemostasis, increasing thrombotic event risk due to platelet hyperactivity.
• The negative health consequences of e-cigarette exposure, particularly on cardiovascular health, should not be underestimated.
• Further research is warranted to fully understand the long-term cardiovascular impacts of e-cigarette use.