Regulation of immune checkpoints by electronic cigarette

Area of Science:

• Immunology
• Toxicology
• Oncology

Background:

• E-cigarettes are increasingly used, but their health effects, particularly on the immune system, are not fully understood.
• Immune checkpoints regulate T cell responses, and their dysregulation is implicated in various diseases.
• While traditional cigarette smoke's effects on immune checkpoints are studied, e-liquids' impact remains under-reviewed.

Purpose of the Study:

• To analyze how e-cigarette aerosols and e-liquid components affect inhibitory immune checkpoint expression and function.
• To discuss the biological impact of these modulations on cellular processes.

Main Methods:

• Review and analysis of existing scientific evidence on e-cigarette aerosols, e-liquid components, and immune checkpoints.
• Discussion of findings in the context of various diseases, including cancer and rheumatoid arthritis.

Main Results:

• E-cigarette aerosols and key e-liquid constituents demonstrably modulate the expression and function of inhibitory immune checkpoints.
• These modulations have been observed in models related to cancer, rheumatoid arthritis, and physical stress.

Conclusions:

• E-cigarette use may lead to adverse immunological alterations through immune checkpoint dysregulation.
• Further investigation is crucial to elucidate the biological consequences and disease implications of e-cigarette-induced immune checkpoint changes.