Photo: David Goldman / AP
Scientists of the Marine biological laboratory (USA) have identified the mechanism by which low ambient temperature contributes to increased lifespan. According to researchers, the main role is played by specific genes encoding cold sensitive proteins. About it reported in a press release on Phys.org.
It is known that one of the factors that affect the longevity of an organism is the environment temperature and body. So, many invertebrate species live longer at low temperature. However, this dependence is still poorly understood. It is believed that life expectancy is increasing due to the decrease in metabolic rate, which in turn reduces cell damage and the rate of formation of active forms of oxygen. Some scientists suggest that the relationship is mediated by a specific signal.
In the new work, the researchers analyzed the effect of cold on 11 cultures of rotifers Brachionus rotifersto test whether the life is extended due to thermal reactions in the animal organism. In this case, from all cultures, life expectancy should increase equally. However, the results of the experiment showed that this figure rose 6-100 percent depending on the culture.
In addition, biologists combined effect of low temperature and low-carb diet that has led to a further increase in life expectancy. This is because various factors can involve similar or overlapping each other cellular mechanisms. According to scientists, the key role played by the gene that encodes the TRPA1 protein, sensitive to cold. Further research will help to develop methods of dealing with aging in humans.
Video, photo All from Russia.