研究发现日光可增强人体免疫力

Core Findings - A recent study from New Zealand indicates that human immune function is more active and efficient during the day due to a biological clock mechanism that responds to light [1][2] - The research supports previous scientific views that circadian rhythm disruptions, such as night shifts and jet lag, may increase infection risks [1] - Neutrophils, a key immune cell type, are controlled by circadian rhythms and are more effective at responding to infections during the day [1] Research Methodology - Researchers used zebrafish as a model organism due to their high genetic similarity to humans and transparent bodies, which allow for real-time tracking of cell behavior [1] - The study involved capturing images of neutrophils killing bacteria at different times of the day, revealing higher efficiency during daylight hours [1] - Gene editing was employed to disable the biological clock of neutrophils, demonstrating that these immune cells possess a light-regulated internal circadian rhythm that enhances their bacterial killing ability [1] Implications for Treatment - The discovery of this biological clock mechanism in neutrophils not only aids in understanding immune system operations but also opens new avenues for treating various inflammatory diseases [2] - Future research will focus on how light signals regulate the rhythms of these immune cells at the molecular level, potentially leading to the development of new therapies to enhance immunity [2]