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Da Silva: What is happening in Gaza is not a war, it is a genocide
Da Silva: Even the Jewish people do not want this war; it is revenge by a government against the possibility of establishing a Palestinian state
Brazilian President Lula da Silva: What we are seeing is not a war between two armies. [What we have is a] completely professional army that is killing women and children in the Gaza Strip.
Hamas: We affirm our readiness to immediately begin a round of indirect negotiations to reach an agreement on the points of contention
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Al Mayadeen's correspondent: Israeli occupation forces blew up Noura Al-Kaabi Hospital, designated for kidney dialysis patients, in the northern Gaza Strip
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Yemeni Armed Forces Spokesperson Yahya Saree: The remaining airlines that have not yet complied with the ban are urged to take this into serious consideration to ensure the safety of their aircraft and passengers
Yemeni Armed Forces Spokesperson Yahya Saree: The YAF, after successfully imposing a partial ban on air traffic at Lydd Airport, are now working to impose a full ban on air traffic at the aforementioned airport in the coming period
Yemeni Armed Forces Spokesperson Yahya Saree: YAF's UAV Unit carried out three military operations targeting three vital Israeli sites in the occupied Palestinian areas of Yafa, Isdud, and Umm al-Rashrash, using three drones

Here's why hair turns grey

  • By Al Mayadeen English
  • Source: Agencies
  • 20 Apr 2023 15:55
3 Min Read

The mechanism was investigated by the New York University (NYU) team using mice, whose fur color is determined by the same cells.

  • x
  • A man with grey hair using his phone (AFP)
    A man with grey hair using his phone. (AFP)

By pointing to pigment-producing cells that lose the capacity to mature, US researchers think they may have discovered why hair becomes grey with age.

The arrested development affects immature cells which would otherwise have evolved into melanocytes which provide hair with its natural color.

The mechanism was investigated by the New York University (NYU) team using mice, whose fur color is determined by the same cells.

They suggest that the research could serve as a foundation for reversing the greying process.

The study of melanocytes may also aid in the understanding and treatment of some malignancies and other diseases, as per the British Association of Dermatologists (BAD).

Here's what you should know

Hair follicles, which are located in the skin and are home to melanocytes, the cells that produce pigment, are where new hair grows.

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Melanocytes also continually die and regenerate. Stem cells are used to create new ones, and it's thought that in persons with grey hair, these stem cells get "stuck" in limbo.

The cell aging process was investigated by the NYU Langone Health team using specialized scanning and lab methods.

A growing percentage of the melanocyte stem cells become ineffective at their work as hair ages, sheds, and then grows back continuously.

The stem cells become stuck and cease moving throughout the follicle, failing to develop into fully developed melanocytes. The absence of pigment causes the hair to become silver, white, or grey.

The possibility that greying hair might be a partially reversible process has been raised by scientists before.

Premature greying may have several causes, some of which are curable.

According to some researchers, stress may be a factor in the whitening of human hair, and it has been hypothesized that reducing anxiety may temporarily restore color.

Other studies argue that heredity, or our DNA, may have a role in when we start to get older.

"The recent study in mice adds to our understanding of the hair follicle and how the pigment-producing cells function. We are already discovering more about the potential of stem cell therapies for conditions including hair loss and studies such as this one, with new findings about the color-producing cells, may lead to an array of future treatment options for our patients," said Yusur Al-Nuaimi from the British Hair and Nail Society.

Read more: Beethoven's Hair DNA decoded to study his health issues

  • DNA
  • NYU
  • Melanocytes
  • grey hair

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