Asimismo, este hallazgo confirma que el tabaquismo pasivo o exposición prolongada al humo del tabaco en el ambiente puede también causar la enfermedad.
Los autores expusieron fibroblastos humanos a distintas concentraciones de extracto de humo de tabaco durante 3 horas. Midieron el estrés oxidativo y la apoptosis en estas células, cruciales en el proceso de reparación del tejido pulmonar. Los resultados muestran que el humo del tabaco es capaz de inducir estrés oxidativo y que el grado de oxidación depende de las concentraciones del extracto de humo de cigarrillos. También observaron que el humo induce la apoptosis de los fibroblastos, paralelamente a la oxidación, posiblemente porque las sustancias oxidantes desencadenan el proceso de autodestrucción en dichas células.
Webs Relacionadas
Università di Pisa
http://www.unipi.it/
American Journal of Physiology: Lung, Cellular and Molecular Physiology
http://ajplung.physiology.org/
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