Researchers are investigating gene editing as a potential treatment for progeria, a rare genetic disorder that causes rapid aging in children [1].
This condition, called Hutchinson-Gilford progeria syndrome (HGPS), results from a mutation in the LMNA gene [2]. This mutation produces a toxic protein called progerin that accelerates aging.
Recent studies have demonstrated significant progress using adenine base editors (ABEs) to correct the mutation responsible for progeria. A study published in Nature in 2021 describes the application of ABEs in both cultured fibroblasts and a mouse model of HGPS.
This approach targets and corrects the specific mutation in the LMNA gene that causes the disease. The study found that using lentiviral delivery to treat fibroblasts from patients with HGPS achieved an 87-91% correction rate of the mutation.
It also reduced progerin levels, improved cell function, and fixed abnormal cell structures. Notably, the analysis confirmed that there were no unintended side effects.
The latest developments, highlighted in a New York Times article, report that researchers are now focusing on optimizing the delivery systems for ABEs to treat patients directly. This includes refining methods to administer ABEs effectively and safely to human cells.
The advancements are still experimental but suggest a viable pathway toward clinical application [3].
A single injection of a particular virus carrying the ABE corrected the mutation in various organs in mice. This treatment fixed the faulty RNA, reduced harmful protein levels, and significantly extended the mice’s median lifespan from 215 to 510 days, showing its potential effectiveness.
These findings highlight the promise of in vivo base editing to treat progeria and other genetic disorders by directly addressing their genetic causes.
[1] Nature. In vivo base editing rescues Hutchinson–Gilford progeria syndrome in mice
[2] Cells. Hutchinson-Gilford Progeria Syndrome—Current Status and Prospects for Gene Therapy Treatment
[3] New York Times. A Disease That Makes Children Age Rapidly Gets Closer to a Cure
