Research results that it grows weaker against mental illness when growing in urban areas without keeping pets

byToca Boca

Previous studies have shown that if you grow up in the country as a child or keep animals as pets, risk of future allergy and asthma will decrease. As a similar phenomenon, a research result has been newly announced that people who grew in the country in childhood became more resistant to mental illness than those who did not keep pets in the city.

Less immune activation following social stress in rural vs. urban participants raised with regular or no animal contact, each | PNAS
http://www.pnas.org/content/early/2018/04/24/1719866115

City upbringing, without pets, boosts vulnerability to mental illness: 'Hygiene hypothesis' likely applies to psychiatric disorders too - ScienceDaily
https://www.sciencedaily.com/releases/2018/04/180430160419.htm

Increase in allergic diseases is caused by improvement of hygiene environment, improvement of standard of living, diffusion of vaccination, changes in dietary habits, and decrease in childhood infectious diseases due to antibiotic abuseHygiene"Was first shown in 1989 and is backed up by epidemiological data as of 2018. In a recent study collaborated by Ulm University in Germany and Boulder, Colorado University in the United States, data showing further evidence supporting this hygiene hypothesis was presented.

It has been shown in previous studies that contacting pets and putting them in a rural environment at the child's developmental stage is related to reducing the risks of asthma and allergy in subsequent life. According to Professor Christopher Rowley, a coauthor of the paper, the latest research showed that contact with animals and rural environment was the first to show importance for mental health as well as allergy.

byLuke Brugger

A research led by Professor Steven Lieber of the University of Ulm is intended for healthy German males between 20 and 40 years old. At this time, half of the subjects were raised on the farm with the domestic animals, and the other half were people who grew up in the urban environment without a pet.

In the experiments, subjects were asked to make a speech in front of an expressionless audience and to answer difficult mathematical problems in time. Subjects' blood and saliva were collected 5 minutes before the experiment, 5 minutes after the experiment, 15 minutes, 60 minutes, 90 minutes, and 120 minutes after the experiment, the subjects were examined.

Then, the subjects who grew up without keeping pets in the city said that the level of peripheral blood mononuclear cells (PBMC) related to the immune system was very high after experiencing a great stress. Also related to inflammationInterleukin-6To prolong the rise in the value of the immune response and calm the immune responseInterleukin-10I can not see too much.

"People who grew up in the cityA stressorThere was a high degree of inflammation / immune response induced against the disease, and it lasted for 2 hours, "Professor Laurie said. However, on the other hand, it seems that subjects raised in the city reported less "they are feeling stress" than in the country-raised subjects. In this regard Professor Laurie explains, "Excessive inflammatory reactions are like" sleeping giants "who the principal does not notice at all". The inflammatory response is known as a factor that makes PTSD and depression more likely in later life.

Previous studies have shown that immune regulatory responses to stress are developed by children, mostly by the microbial environment surrounding them. Researchers note that people are no longer exposed to microbial environments, as approximately half of the modern world population lives in urban areas. "If you are not exposed to such organisms, your immune system can not develop a balance between inflammatory and anti-inflammatory.The inflammatory response will build up by chronically lower inflammation, It will become weaker against allergies, autoimmune diseases, and mental illness, "Professor Laurie says.

byPim Chu

"It seems to have a beneficial effect in raising children in an environment that can be touched by various microorganisms," Professor Lieber said, as the experiments conducted this time were small, researchers I am hoping to add female subjects, change the region, and conduct a larger scale experiment. It is said that you want to reveal how much profit from contact with animals is and how much you benefit from living in the country.