Alien germs might pose threat to human immune systems and space missions: Study

A recent study revealed that immune system of mammals, including humans, could struggle to fight germs from or planets. Scientists from universities of Aberdeen and Exeter tested how mammal immune cells responded to ‘peptides’ (combinations of ami acids) contenting two ami acids that are rare on Earth but are commonly found on meteorites. According to research, scientists conducted study on mice which showed that immune cells responded to ‘alien’ peptides in way that was ‘less efficient’ that to germs from this planet. 

scientists examined reaction of T cells, which are key to immune responses, to peptides containing ami acids commonly found on meteorites. While T cells rmally work to kill pathogenic bodies and can recruit or cells to fight inving diseases, researchers ted that when y introduced ami acids T cell response was less efficient. study informed that T cells activation levels were at 15 to 61 per cent as compared to 82 to 91 per cent when exposed to peptides me entirely of ami acids that are common on Earth. 

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Le author Dr Katja Schaefer, of University of Exeter, said in statement, “Life on Earth relies on essential 22 ami acids”. He ded, “Our investigation showed that se exo-peptides were still processed, and T cells were still activated, but se responses were less efficient than for 'ordinary' Earth peptides”. 

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‘Immulogical risk’ for pace missions 

scientists speculate that contact with extra-terrestrial microorganisms might pose an ‘immulogical risk’ for missions aiming to retrieve organisms from exoplanets and moons. researchers also hyposised that lifeforms that are evolved in an environment of different ami acids might contain m in structure. researchers chemically synsised ‘exo-peptides’ containing ami acids that are rare on Earth and tested wher a mammal immune system could detect m. 

Furr, as per study, researchers ted that discovery of liquid water at several locations in solar system raises possibility that microbial life may have evolved outside Earth, and could, refore, be accidentally introduced into earth’s ecosystem. new study also raises concerns as missions to or planets are becoming more common. While UAE recently launched its first mission to Mars, China sent ‘Questions to Heaven’ rover for a 90-day exploration of Red planet. 

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