Covid today, last minute live | They discover the mechanism by which patients with Covid lose their sense of smell

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Researchers have discovered a mechanism that could explain why

patients lose their sense of smell.

Published in the journal

, the new study has discovered that

infection indirectly reduces the action of

(OR), proteins located on the surface of

in the nose that detect molecules associated with odors .

update narration

07.20.

They discover the mechanism that causes the loss of smell by Covid-19

infection

indirectly reduces the action of olfactory receptors (OR), proteins located on the surface of nerve cells in the nose that detect molecules associated with odors.

Led by researchers at New York University Grossman School of Medicine and Columbia University in the United States, the new study may also shed light on the effects of

on other types of brain cells and on other effects persistent neurological symptoms of

such as "brain fog", headaches and depression.

The experiments showed that the presence of the

near nerve cells (neurons) in the olfactory tissue triggered a surge of immune cells, microglia and T cells, which detect and counter infection.

These cells release proteins called cytokines that modify the genetic activity of olfactory nerve cells, even though the virus cannot infect them, the study authors say.

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