Dysregulation of immunity by cigarette smoking promotes inflammation and cancer: A review.
Level 5 - mechanism / opinion, no new human data
Narrative review of secondary literature and mechanism-based reasoning without systematic methods or primary empirical data
PubMed 37838314 · doi:10.1016/j.envpol.2023.122730
What was done
Narrative review summarizing the literature on the harmful chemical constituents of cigarette smoke (such as nicotine, acrolein, aromatic hydrocarbons, and heavy metals) and their mechanistic effects on immune regulation, the creation of inflammatory and tumor microenvironments, effector cells (macrophages, neutrophils, T lymphocytes), and molecular pathways including DNA damage and epigenetic alterations.
What was found
The abstract reports no numerical data, effect sizes, or quantitative findings. It provides a qualitative narrative synthesis of mechanisms linking cigarette smoke components to immune dysregulation, chronic inflammation, and carcinogenesis.
Why it matters
Synthesizes mechanistic pathways linking tobacco chemical exposure to immune disruption and cancer development, highlighting molecular and cellular targets.
Limits
Narrative review design without systematic search criteria, meta-analytic pooling, or formal risk of bias assessment; presents no primary clinical or epidemiological data; abstract contains no quantitative metrics or sample sizes.
Cited by
- context Smoking, especially nicotine, damages DNA, increases inflammation, and shortens lifespan.