oxidative stress

Brain cells in older Drosophila tend to have more than two complete sets of chromosomes, and that polyploidy most likely has a protective function, a study shows.

Mouse experiments indicate that, contrary to observations in pregnant women, reactive oxygen species contribute to normal placental development.

The fast-flying insects convert sugars from nectar into antioxidants, which can help heal the oxidative damage suffered by their hard-working muscles.

Deficiency in a protein called pejvakin makes inner ear cells more vulnerable to sound, unable to brace themselves against oxidative stress stimulated by noise. 

Overeating and inactivity lead to insulin resistance in just days—and oxidative stress is to blame.