Abdel-Rahman Fawzia, Okeremgbo Bethel, Alhamadah Fatimah, Jamadar Sakha, Anthony Kevin, Saleh Mahmoud A
a Department of Biology , Texas Southern University , Houston , Texas , USA.
b Department of Chemistry , Texas Southern University , Houston , Texas , USA.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2017 Apr 16;52(5):433-439. doi: 10.1080/10934529.2016.1270676. Epub 2017 Jan 13.
This study aimed to investigate the biological impact of exposure on domestic light emitting diodes (LED) lighting using the free-living nematode Caenorhabditis elegans as a model. Nematodes were separately exposed to white LED light covering the range of 380-750 nm, blue light at 450 nm and black light at 380-420 nm for one life cycle (egg to adult) with dark exposure as the control. Each light range induced stress to the nematode C. elegans such as reducing the number of the hatched eggs and/or delayed the maturation of the hatched eggs to the adult stage. In addition, it lowered or prevented the ability of adults to lay eggs and impaired the locomotion in the exposed worms. The observed type of biological stress was also associated with the production of reactive oxygen species (ROS) as compared to nematodes grown in the dark. It is concluded that the blue light component of white LED light may cause health problems, and further investigation is required to test commercial brands of white LEDs that emit different amounts of blue light.
本研究旨在以自由生活的线虫秀丽隐杆线虫为模型，调查暴露于家用发光二极管（LED）照明下的生物学影响。线虫分别暴露于覆盖380 - 750纳米范围的白色LED光、450纳米的蓝光和380 - 420纳米的黑光下一个生命周期（从卵到成虫），以黑暗暴露作为对照。每个光照范围都会对线虫秀丽隐杆线虫造成压力，比如减少孵化出的卵的数量和/或延迟孵化出的卵成熟到成虫阶段。此外，它降低或阻止了成虫产卵的能力，并损害了暴露线虫的运动能力。与在黑暗中生长的线虫相比，观察到的这种生物学压力类型也与活性氧（ROS）的产生有关。得出的结论是，白色LED光的蓝光成分可能会导致健康问题，需要进一步研究来测试发出不同量蓝光的商用白色LED品牌。
