Scientists Have Discovered A Compound That Could Supercharge Aging Muscle Repair

Image Courtesy: Shutterstock

Scientists in Japan have identified a sulfur-based compound that may significantly improve the body’s ability to repair aging muscles, raising hopes for new treatments that could help preserve strength and mobility later in life.

Researchers at Kyushu University found that a compound called lipoic acid trisulfide (LASSS) enhanced the activity of a key muscle repair protein known as hepatocyte growth factor (HGF). Rather than simply acting as an antioxidant, LASSS appeared to strengthen HGF’s ability to activate muscle stem cells while protecting it from age-related damage.

HGF plays a critical role in repairing skeletal muscle by activating satellite cells, the stem cells responsible for rebuilding damaged muscle fibers. As people age, however, the protein can undergo a chemical process called nitration, which alters its structure and prevents it from binding effectively to its receptor. The researchers compare the damaged protein to a rusted key that no longer fits its lock, reducing the body’s ability to regenerate muscle.

Led by Professor Ryuichi Tatsumi, the research team tested two sulfur-rich antioxidant compounds, glutathione trisulfide (GSSSG) and LASSS, to see whether they could protect HGF from nitration. While both compounds reduced the chemical damage, only LASSS dramatically improved the protein’s performance.

When researchers increased the concentration of LASSS, HGF’s ability to bind to its receptor more than doubled compared with untreated HGF. The enhanced protein also became more resistant to nitration, particularly at one of the key sites responsible for its normal function.

“This exceeded our expectations,” Tatsumi said. He suggested LASSS does more than neutralize harmful molecules, proposing that it may directly reshape HGF into an enhanced form that binds more strongly to its receptor while resisting age-related damage.

The team also tested LASSS in mice with muscle atrophy caused by prolonged inactivity. Animals treated with the compound showed significantly lower levels of HGF nitration than untreated mice, suggesting the protective effect extends beyond laboratory experiments.

Although further studies are needed to confirm the compound’s safety and effectiveness in aging animals and humans, the findings point to a promising strategy for combating muscle loss associated with aging, extended bed rest, and inactivity. If future research confirms the results, LASSS could one day help older adults maintain muscle strength, independence, and overall quality of life.