Why human skin is not covered with wool

Why human skin is not covered with wool

Rebuilding «Human erection», Museum of Natural History, Vienna

Wool deficiency, unlike other primates – Old secret of biology There are many hypotheses that explain why a person has lost his hair practically on his body, but so far none of them can be proven. However, the answer to the question is «Why» Still in suspense, there has been some progress recently regarding this issue «how».

Rebuilding «Human erection», Museum of Natural History, Vienna

Why human skin is not covered with wool

Wool deficiency, unlike other primates – Old secret of biology There are many hypotheses that explain why a person has lost his hair practically on his body, but so far none of them can be proven. However, the answer to the question is «Why» Still in suspense, there has been some progress recently regarding this issue «how».

In a recent study, the results of which were published in the journal Cell Biology, scientists have found that the concentration of a fixed protein is associated with the development of hair on the organs. If a protein called Decouf 2 or DK2 is present in small amounts, such as in rabbit and polar bears, the platter of the claw is overrun with dense hair. In small-haired rats, Dkk2 protein is present in some large quantities..

A group of researchers suggested that the protein can block a particular signaling pathway, which is known as WNT, which is responsible for the development of hair. To test this hypothesis, they are using gene engineering to bring out rats, unable to produce Dkk2 protein. Fur grow on the bottom of the claws of these animals, but it was thinner and smaller compared to other animals, and apart from this, it increased in different sections. Thus, it was concluded that Dkk2 plays an important role in this mechanism, but does not provide the full picture..

«The presence of Dkk2 protein is enough to prevent hair growth, but it does not relieve the animal of all control mechanisms. There is still a lot to find out., – Professor Sarah Miller, professor of dermatology at the University of Pennsylvania’s Perlman School of Medicine, told Smithsonian in an interview.. – We have very long hair on our head, but they are completely absent on palms, short wrists and feet. No one fully understands why this selectivity has been explained, and how these differences arise.».

Although the study did not give the full picture, they helped find intriguing tips about hair loss and baldness. Researchers believe that the WNT is the key to the signaling path, and the next step should be to study that other proteins other than Dkk2 can prevent its activity. This not only creates a complete understanding of how people have to lose hair on the body, but also for the potential applications of results obtained in medicine. In addition, you may be able to find some important details about skin diseases such as psoriasis and vitiligo..

The main explanation for why people have lost their hair on their bodies is that when they went from shady forest to hot savanna, they needed better thermogenesis. It was necessary for our distant ancestors to hunt at the time of day. Another theory explains this phenomenon by the fact that the absence of hair has reduced the number of parasites. There is also an aquatic principle of primates, according to which there was a time when our ancestors received food for themselves, diving and floating in the water, and wool proved to be an obstacle in this matter. It may be necessary to keep in mind the combination of several factors for a complete explanation..

© MixStuff 2012. The rights to published translations are from the owners of the MixStuff.com website.

All graphic images used in the design of the article belong to their respective owners. The copyright notice applies only to the text of the article..

Using content from the site without the active indexed link is prohibited from the source.

Please follow and like us:

Leave a Reply

Your email address will not be published. Required fields are marked *