High-Altitude Gene Helps Heal Myelin Damage

Neuroscience
·March 13, 2026

Summary: Evolutionary adaptations that allow animals like yaks and Tibetan antelopes to thrive at 14,700 feet may provide a breakthrough for human neurodegenerative diseases. A study reveals that a mutation in the Retsat gene—common in high-altitude species—protects the brain from low oxygen and promotes the regeneration of the myelin sheath.

By identifying a specific metabolite called ATDR (derived from Vitamin A), researchers successfully repaired nerve damage in mouse models of Multiple Sclerosis (MS) and cerebral paralysis, offering a natural pathway to heal the brain from within.

Key Facts

• The Retsat Mutation: Animals on the Tibetan Plateau carry a specific mutation on the Retsat gene that maintains healthy brain function despite chronic oxygen deprivation.
• Myelin Protection: In newborn mice exposed to thin-air conditions (13,000+ feet), those with the Retsat mutation showed significantly better learning, memory, and higher myelin density.
• The ATDR Breakthrough: The mutation increases enzymatic activity that converts Vitamin A into ATDR. This molecule triggers the maturation of oligodendrocytes—the “factory” cells that build and repair myelin.
• MS Treatment Potential: When mice with an MS-like disease were given ATDR, their motor function improved and their disease severity decreased.
• A Natural Alternative: Unlike current MS treatments that focus on suppressing the immune system, ATDR leverages a molecule already present in the human body to actively repair damage.

A genetic mutation that helps animals like yaks and Tibetan antelopes survive at high altitudes may hold the key to repairing nerve damage in conditions such as cerebral paralysis and multiple sclerosis (MS). 

The finding, publishing March 13 in the Cell Press journal Neuron, reveals a naturally existing pathway that promotes regeneration after nerve damage and could open new doors for treating diseases like MS by leveraging molecules that are already present in the human body. 

“Evolution is a great gift from nature, providing a rich diversity of genes that help organisms adapt to different environments,” says corresponding author Liang Zhang of Songjiang Hospital Affiliated to Shanghai Jiao Tong University School of Medicine. “There is still so much to learn from naturally occurring genetic adaptations.” 

The myelin sheath is a protective layer that surrounds nerve fibers in the brain and spinal cord, allowing nerve signals to transmit efficiently. Insufficient oxygen during brain development can damage this layer, leading to conditions like cerebral paralysis in newborns. 

In adults, injuries to the myelin sheath are tied to MS, an autoimmune disease in which the immune system mistakenly attacks and destroys the myelin sheath. Reduced blood flow to the brain, often associated with aging, can also damage myelin, contributing to conditions such as cerebral small vessel disease and vascular dementia. 

In previous studies, researchers have found that animals living on the Tibetan Plateau—which has an average elevation of 14,700 feet—carry a mutation on a gene called Retsat. Scientists suspected that this mutation helps animals like yaks and Tibetan antelopes maintain healthy brain function despite chronically low oxygen levels.  

Zhang and his team set off to investigate if this mutation could prevent myelin sheath damage. They exposed newborn mice to low-oxygen conditions equivalent to elevations above 13,000 feet for about a week. 

Continue reading by clicking here