Cigarette smoke exposure linked to reproductive gene changes in mice

A study conducted by researchers at the Universities of Nottingham and Sheffield has identified biological mechanisms through which cigarette smoke may impact reproductive health. Published in the journal Frontiers, the research utilized a mouse model to observe the effects of varying levels of smoke exposure over a 12-week period.

In female subjects, while the number and structure of ovarian follicles remained relatively stable even under high exposure, researchers observed significant changes in gene activity. Specifically, genes related to cell division and metabolism showed decreased activity, while those associated with protein production increased. These patterns mirror biological processes linked to ovarian aging and reduced function.

In male subjects, higher levels of smoke exposure were linked to structural changes in the testes, such as the enlargement of seminiferous tubules. The study also noted alterations in gene activity related to sperm production, immune responses, and cell signaling. Researchers suggest these findings provide insight into how smoking may alter biological processes essential for normal testicular function and sperm development.