Immune System works Better at Night

In Health and Safety, Research by Paul MartinLeave a Comment

Stanford University has done research on the effect a good night’s sleep has on a sick body.  The research, involving fruit flies, reveals that the immune system fights invading bacteria the hardest at night.

“These results suggest that immunity is stronger at night, consistent with the hypothesis that circadian proteins upregulate restorative functions such as specific immune responses during sleep, when animals are not engaged in metabolically costly activities,” Stanford researcher Mimi Shirasu-Hiza said in a news release issued by the conference organizers.

The circadian rhythm runs the internal clock’s time for eating and rest every day, and it paces both the human body and the fruit fly.  The researchers found, through previous experiments, that bacterial infection threw off the fruit flies circadian rhythm.  This made them susceptible to infection.

This time around, they infected the flies with two different types of bacteria, at different times of day or night.  The flies infected during the day were less likely to survive than those infected during the night.  Low “phagocytic” activity – the body’s innate immune response – was detected in flies with a corrupt circadian clock.

More information

The National Sleep Foundation has more about how sleep works.
-via Washington Post

SOURCE: American Society for Cell Biology, news release, Dec. 14, 2008

Paul Martin

Paul Martin

I am the Director of Multimedia at ProTrainings, as well as the primary blogger here. I take care of the video editing, graphic design and corporate branding that you see on every video and every page on this site, as well as at ProCPR®, ProFirstAid®, ProBloodborne, StudentCPR, etc. My work is literally everywhere that ProTrainings goes. I also handle our Twitter accounts, so be sure to follow us there, if you use twitter! You can be sure that I’m not just an average joe writing this blog, but one of the founders of the company.

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