The researchers summarized findings of their own investigations and extensive foreign experience, medical statistics and data of experiments carried out on rodents. Permanent bright light suppresses synthesis of melatonin, the hormone that impacts the endocrine system work and prevents cancerous growth formation and development.
Light pollution has become almost an integral part of contemporary life. Bright electric light pours on the people who have to work on night shifts, pilots and stewardesses, who often travel from one time zone to another, and inhabitants of the North (where white nights take place in summer). Normal functioning in humans requires regular changing of day and night, light and darkness. In the dark, the epiphysis (the pineal gland) synthesizes the melatonin hormone, but the influence of light at night hours suppresses this synthesis. Melatonin is also a well-known biological blocker of malignant neoplasms.
The more intense the night-time light, the stronger it suppresses the melatonin synthesis. Some people are more sensitive to night-time illumination’s action than others, for example, women are generally more sensitive than men. Light pollution can cause premature reproductive system ageing, and increase the risk of breast cancer and large intestine cancer in women. Night workers and pilots more often suffer from large intestine or rectal cancers. In addition, irregular light can causes sleep disturbance, gastrointestinal and cardiovascular diseases, metabolic derangements and, possibly increase the likelihood of developing diabetes.
This is confirmed by results of experiments with rodents, which react to permanent light in the same way as humans do. Cancerous growth occurs more often with mice and rats under permanent light conditions, being more susceptible to chemical carcinogens and malignant cell inoculation. Mice suffering from cancer die more often in light pollution conditions than in controls with undisturbed day and night. A similar phenomenon is also recorded by clinicians: according to some observations, patients with large intestine cancer who retain the 24-hour rhythm of activity live longer than the patients with disrupted rhythms.
Cancerous growth behavior is closely connected with the melatonin concentration in the serum. It usually changes depending on the time of the day, but with oncological patients and laboratory animals, the diurnal rhythm of melatonin in serum is significantly disrupted, and its concentration is below normal.
Nadezda Markina | alfa
PET imaging tracks Zika virus infection, disease progression in mouse model
20.09.2017 | US Army Medical Research Institute of Infectious Diseases
'Exciting' discovery on path to develop new type of vaccine to treat global viruses
18.09.2017 | University of Southampton
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
20.09.2017 | Life Sciences
20.09.2017 | Power and Electrical Engineering
20.09.2017 | Physics and Astronomy