Compounds reduced aging-related markers in human airway cells
Laboratory experiments in smoke-exposed airway cells from people with and without chronic obstructive pulmonary disease found that activating an antioxidant regulator reduced senescence markers.
Limit: Senescence was scored by p21 and p16; lung function was not measured
Edited by Boris Djordjevic · AgingResearch.News
Researchers exposed primary human bronchial epithelial cells, which line the airways, from people with and without chronic obstructive pulmonary disease (COPD) to cigarette smoke extract. In these laboratory experiments, they tested three compounds that activate Nrf2, a protein that regulates antioxidant defenses, with metformin as a comparator.
Smoke extract increased oxidative stress, DNA damage and markers of senescence, a state in which cells stop dividing. These effects were more pronounced in COPD-derived cells. The Nrf2 activators strengthened antioxidant defenses, reduced a marker of DNA damage, lowered senescence markers and reduced release of two inflammation-promoting proteins in both groups. Obacunone showed the most consistent protective profile. Separately, Nrf2 activation reduced inflammation, tissue remodeling and senescence-associated changes in a mouse model of acute lung injury.
Why it matters
COPD involves accelerated lung aging and a buildup of senescent cells. The authors identify Nrf2 activation, particularly with obacunone, as a promising strategy for targeting senescence-driven lung disease.
Caveats
The compound effects came from cells grown in the lab and a mouse model of acute lung injury, not a treatment trial in people with COPD.
The paper
Therapeutic induction of Nrf2 activation to reduce senescence in COPD
Universitat de València
Respiratory Research, Oct 27, 2026, Open access, CC BY
