Gene expression in space

Under stressful situations, normally, there is a change in genetic expression.

Accordingly there were changes, but, the unexpected finding was that, these changes in gene expressions, seemed to have accelerated(6 times more) during the latter 6 months of the mission.

This is concerning, because for extended space missions, this could imply that genetic expression could alter exponentially leading to severe consequences. 

Upon returning, about 90% of these altered genetic expressions returned back to preflight states.