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Bacteria from Space Can Threaten Human Immune System



Not only viruses on Earth, scientists claim that humans and other mammals must prepare to fight bacteria from other planets.

With the right conditions and mixture of elements, microorganisms from space can exist on Earth. Especially at this time many missions to other planets to look for signs of their lives.

In theory, alien life is formed from amino acids. This compound consists of nitrogen, carbon, hydrogen and oxygen and forms the basis for all life.

Also Read: Tianwen-1, China's First Mars Mission Successfully Launched

Scientists from the University of Aberdeen and the University of Exeter tested how mammalian immune cells react to peptides that contain two rare amino acids on Earth, but are commonly found in meteorites.

The amino acids "isovaline" and "α-aminoisobutyric acid" were tested on mice that had the same immune system as humans.

The results show that the mouse's immune system responds to "alien" peptides in a way that is "less efficient" than bacteria on Earth.

The research team then examined mammalian T cells which normally work to kill bacteria, as well as recruiting other cells to fight disease. When researchers give amino acids from meteorites, T cell responses are "less efficient". The activation level is only 15% from 61% - lower than 82% and 91% when exposed to Earth's amino acids.

"Seeing this, we speculate that contact with extraterrestrial microorganisms can pose a risk to the immune system. Especially for those involved in space missions with the aim of collecting organisms from exoplanets and the Moon, "said Dr. Katja Schaefer of the University of Exeter.

Also Read: How Many Humans Are Needed To Survive On Mars?

"The world today must be careful of the challenges for the immune system caused by the emergence of new pathogens," added Professor Neil Gow, Deputy Vice-Chancellor of the University of Exeter.

The discovery of fluids in several locations in the Solar System increases the possibility that extraterrestrial microbial life can also enter and evolve on Earth. The issue of alien bacteria is attracting the attention of many people lately along with the increasingly widespread travel into space.


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