Friday , August 12 2022

End of annoying bites? Scientists can deceive mosquitoes to see us – Novinky.cz



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Among all the representatives of the animal kingdom, no one may be more dangerous to people than mosquitoes. The US Center for Disease Control and Prevention, according to The Los Angeles Times, has decided that mosquitoes are responsible for at least 700,000 deaths in the world each year.

"To find out how to deal with mosquitoes, we need to understand them first," said geneticist Matthew DeGennaro of Florida International University in Miami, according to Science News.

The discovery could help to create substances that would effectively hide people from mosquitoes.

Therefore, experts focused on the tropical mosquito or mosquito species Aedes aegypti, which is native to Africa, but has also spread to tropical and sub-tropical regions worldwide.

Our carrier (ie especially women) is of malaria, ebola, zika virus and other infectious diseases. Although these mosquitoes can feed on animal blood, they prefer the man.

New researchers have found an important protein that allows mosquitoes to correctly identify lactic acid in human sweat. Why is it interesting?

Genetic biologists have said that the main stimulus for finding a victim in mosquitoes is carbon dioxide. According to the information available, they can feel up to 10 meters away, as well as detecting odor, heat and body moisture.

However, the oxide alone stimulates activity and uses more complex chemical extinguishers to better locate the victim. Since the 1960s, scientists have thought that lactic acid can be as much exposure in people that plays a central role, which is partially excreted in the body through sweat. And because of that, we know the mosquito correctly.

"Human skin emits a lot of lactic acid compared to other vertebrates," said DeGennaro.

Turn off the gene in mosquitoes

Protein in antennas Aedes aegypti Lactic acid ("odor") detected from the skin. If the protein is modified, it can leave the creature confused about whether we are “sufficiently human to make sense of push and suck blood”, said Science News.

Genus mosquitoes were adapted sitting on people's hands twice as much as the others.

The smell of insects works differently than on humans, so scientists have not managed to find the recipient who is responsible for the reaction with acid. It is thought that mosquitoes use three groups of sensible proteins. A large proportion of the carboxylic acids are responsible for a group of ionotropic receptors as it's called. Among these receptors, the authors discovered the IR8a protein, which "saw" lactic acid in the air.

During the experiment, scientists had literally switched off the Egyptian gene in some individuals, responsible for juxtaposing IR8a. These mosquitoes – with non-disturbing abilities – then sat on people's hands twice as much as those that usually work.

According to experts quoted by Current Biology magazine, the discovery could help create other substances that would "hide" people from mosquitoes and mosquitoes. Another known tool could be added to the known resistance, which works mainly on the chemical basis of DEET.

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