Study suggests human growth hormone can reverse epigenetic aging

genetic
Credit: CC0 Public Domain

A team of researchers affiliated with several institutions in the U.S. and one in Canada has found evidence that suggests recombinant human growth hormone (rhGH) can reverse epigenetic aging in humans. In their paper published in the journal Aging Cell, the group describes their efforts to learn more about the impact of rhGH on the thymus, and what they found.

The researchers report that their interest in the impact of rhGH on the began when they came across a report describing research in 1986 that showed injecting rats with rhGH boosted their immune system. One of the team members, Gregory Fany, actually tested the idea on himself back in the 1990s, and found that that it appeared to rejuvenate his thymus, which boosted his immune system.

The thymus is a gland in the chest that converts to T cells and therefore plays an important role in immune response. Unfortunately, as humans age, fatty deposits develop in the thymus, along with reductions in —the result is weakened immune responses. In this new effort, the researchers wanted to get a better idea of what happens to the thymus and the if people are given rhGH. To find out, they recruited nine volunteers, all , to participate in their study.

The study consisted of giving each of the volunteers the growth hormone DHEA. Each was also given two drugs to ward off diabetes, since DHEA had been found to trigger the disease. The volunteers were monitored over the course of a year. At the end of the year, the researchers found that seven of the nine volunteers had lost fat in their thymuses and that healthy tissue had regrown to replace it. On a whim, the researchers also conducted epigenetic marker (methylation) testing on the volunteers, as well. They report that all 10 of the volunteers experienced reverse epigenetic aging—on average, they grew biologically younger by two and a half years.

The researchers note that their study was very limited, and because of that, more studies are required to determine if human growth hormone can actually reverse the aging process.


Explore further

Can we turn back the clock on an aging thymus?

More information: Gregory M. Fahy et al. Reversal of epigenetic aging and immunosenescent trends in humans, Aging Cell (2019). DOI: 10.1111/acel.13028
Journal information: Aging Cell

© 2019 Science X Network

Citation: Study suggests human growth hormone can reverse epigenetic aging (2019, September 9) retrieved 15 December 2019 from https://medicalxpress.com/news/2019-09-human-growth-hormone-reverse-epigenetic.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
2520 shares

Feedback to editors

User comments