During the day, the activity of our genes oscillates in two great waves, one in the morning, the other in the evening. But these waves, which are larger in women than in men, diminish with age, shows a study in the journal "Science".
It's a story of genes whose activity oscillates, in our cells, during the day and night. Forming two great waves, one in the morning, the other in the evening, the height of which varies according to our tissues. The group of genes involved differs according to our tissues. Moreover, these waves appear more pronounced in women than in men, but are blunted by age in both sexes.
These are the findings of a ground-breaking study carried out on human tissue taken from 914 donors shortly after their death. Published in Science February 3, this analysis reveals the inner workings of our circadian clock.the molecular gear that tells our cells what time of day it is - so they can adjust their tasks to the body's needs.
But why the name "circadian" clock - from the Latin circaclose to", and diesday"? Because in our species, this clock is set to an average period of twenty-four hours and twelve minutes. However, this period depends on the individual. In the case of early sleepers, the clock is faster (its period tends towards twenty-three hours and thirty minutes); in the case of late sleepers, it is slower (twenty-four hours and thirty minutes). Whatever our chronotype, our internal clock has to keep to a twenty-four-hour rhythm. To do this, it uses external synchronizers: daylight, the rhythm of our meals and daily activities...
