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Scientists decide! Extreme stress causes premature graying o

 
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Angemeldet: 11.12.2020
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BeitragVerfasst am: 25.12.2020, 10:05    Titel: Scientists decide! Extreme stress causes premature graying o Antworten mit Zitat


A new study 168SLOTXO published in the journal Nature provides scientific evidence supporting the hypothesis that Stress can cause human hair to turn gray or white.

Researchers have discovered a chemical process that can alter hair color during times of stress. This process is linked to a reaction known as "To fight or escape" (fight-or-flight) of the body that can occur in dangerous situations.

Ya-Chieh Hsu, Professor of Degenerative and Stem Cell Biology At Harvard, the new study is the first to show a clear link between stress and gray hair.

The researchers conducted experiments on mice to see how stress affects the stem cells in the hair follicles?

Scientists point out that Usually, most people have approximately 100,000 hair follicles on the scalp, which are responsible for melanocyte, or hair color cells. When people get older Melanocyte production will be reduced. Thus making me start to turn gray Or gray naturally The researchers speculated that stress could affect the melanocyte stem cells.

Another hypothesis suggests that It could be the hormone cortisol, which is increasing in the body over time, while stress can also be the cause of this.

However, recent results indicate that both hypotheses may be wrong. Because mice that lack melanocyte cells Or cut off the gland to produce the hormone cortisol Still has white and gray fur

The researchers thus used a new method to test the body's sympathetic nervous system, which is responsible for controlling reactions. "Fight-or-flight" in critical conditions

This sympathetic nervous system consists of a set of nerves that extend throughout the body, including the skin. When the rats were inflicted with short-term pain Or in a lab with stress conditions These nerves release a certain chemical called norepinephrine. This will stimulate the melanocyte cells to produce more pigment. This overproduction results in the loss of pigmented cells prematurely.

Professor Ya-Chieh Hsu said the experiment confirmed the researchers' belief that stress is bad for the body. And studies also show that this effect is long-term. Because when all the pigmented stem cells are gone Will not be able to create pigment again permanently

Scientists believe This research could lead to new therapies in the future. Including expanding the results of research studies to see if Can stress affect changes in other tissues in the body that lead to the aging process?
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