Developed by Scientists: Subcutaneous Injection Triples Speed of Time Zone Adjustment

Six-Hour Time Shift, No Fallout

According to НВ — Техно: For frequent flyers and night-shift workers, a sudden schedule change can leave the body struggling for days. A team of scientists has developed a subcutaneous injection that helps the body adapt to new time zones roughly three times faster. The treatment relies on modified human retinal cells enclosed in microscopic alginate capsules; these cells produce leptin, a hormone that controls metabolism and appetite, and the capsules protect the cells from immune attack while temporarily raising leptin levels in the blood.

The therapy is meant as a temporary support: it naturally dissolves a few days after administration. The developers say they plan to tailor it for pilots, military personnel, and people who work overnight shifts.

Evidence From Rodents and Primates

In tests on rodents, the injection enabled the animals to adjust to a four-hour shift in the light-dark cycle 50 percent faster than the control group. In primates, treated monkeys handled a six-hour schedule change a full day sooner by the end of the study. Measurements of heart rate, body temperature, and REM sleep indicated that the procedure was safe and did not compromise the animals' rest quality.

“Traditional approaches to resetting daily rhythms require strict adherence to melatonin schedules or light therapy,” said Omid Veiseh, professor of bioengineering. “We aimed to create a temporary cell therapy that would let the body adapt quickly.”

Samantha Flory, a researcher on the project, added: “Our goal was not to permanently change the circadian system. We built a short-term support that is naturally reabsorbed several days after application.”

The results were reported by SciTechDaily. The intended users include pilots, military personnel, and night-shift workers, as faster adjustment to new schedules could lower stress and improve overall well-being after long-haul travel or shift changes.

Given that circadian disruption can lead to serious health problems, this kind of therapy could become a valuable tool for professions that routinely cross time zones, such as aviation and the armed forces. It may also open the door to similar cell-based treatments that benefit a wider range of people.

As researchers continue to explore innovative solutions for sleep-related issues, another recent development is a wearable patch designed to enhance sleep quality without the need for medication or invasive procedures. This advancement highlights the growing trend of utilizing technology to improve health and well-being, particularly for those facing challenges in adjusting their sleep patterns.