As people grow older, their skin changes in many ways. It becomes thinner, weaker, and slower to repair itself after injury.
Cuts, scrapes, burns, and surgical wounds often take much longer to heal in older adults than in younger people. Slow wound healing can increase the risk of infections, pain, and serious medical complications, especially in people with diabetes or other chronic illnesses.
Scientists have been trying to understand why aging skin loses its ability to heal quickly. A growing amount of research now points to a special group of damaged cells called senescent cells.
These cells are sometimes nicknamed “zombie cells” because they do not die when they should. Instead, they remain inside tissues and continue releasing harmful inflammatory chemicals.
Over time, these senescent cells build up in many parts of the body, including the skin. Researchers believe they may contribute to aging, inflammation, tissue damage, and slower healing.
Now, a new study published in the journal Aging (Aging-US) suggests scientists may have found a way to remove these harmful cells and help older skin recover faster.
The research was carried out by scientists at Boston University Aram V. Chobanian and Edward Avedisian School of Medicine. The team studied a drug called ABT-263, which belongs to a group of medicines known as senolytics.
Senolytic drugs are designed to target and eliminate senescent cells while leaving healthy cells behind. Researchers hope these drugs may eventually help treat diseases linked to aging.
In the new study, scientists tested whether applying ABT-263 directly onto the skin could improve wound healing in older mice.
The researchers treated aged mice with the drug on their skin for five days. After treatment, the scientists created small wounds and carefully monitored how quickly the skin healed.
The results were encouraging. The treated mice showed fewer signs of cellular aging in their skin. Even more importantly, they healed faster than untreated mice.
By day 24 of the experiment, around 80% of the treated mice had fully healed wounds, compared with only 56% of untreated mice.
The researchers found that the treatment appeared to “wake up” important healing pathways that normally become sluggish with age. Genes involved in collagen production, tissue repair, blood vessel growth, and skin remodeling became more active after treatment.
Collagen is especially important because it provides strength and structure to the skin. As people age, collagen production naturally declines, making skin weaker and slower to recover after damage.
One of the study’s more surprising findings involved inflammation. Usually, inflammation is considered harmful when it becomes chronic. Long-lasting inflammation is linked to aging and many diseases.
However, the researchers found that ABT-263 briefly increased inflammation in the skin, and this short burst may actually have helped prepare the tissue for healing.
Scientists explain that some inflammation is necessary during the early stages of wound repair. The problem occurs when inflammation continues for too long or becomes uncontrolled. In this case, the temporary inflammatory response appeared to help activate healing mechanisms in aging skin.
Another important aspect of the study is that the drug was applied directly to the skin instead of being taken as a pill. Oral senolytic drugs can affect the whole body and may cause unwanted side effects.
Topical treatment may offer a safer and more targeted approach because the drug mainly stays in the treated area. The researchers also found that the treatment had a much stronger effect in older mice than in younger mice, suggesting it may specifically target aging tissue where senescent cells have accumulated.
The findings may eventually have important medical uses. Older adults often experience slow recovery after surgeries, injuries, or chronic wounds. Delayed wound healing can lead to infections, hospitalization, and reduced quality of life.
Researchers believe topical senolytic treatments could one day be used before surgery to prepare aging skin and improve recovery afterward.
The study is also part of a larger and rapidly growing field of anti-aging research. Scientists around the world are studying senescent cells because they appear to contribute to many age-related conditions, including arthritis, heart disease, lung disease, and neurodegenerative disorders.
More recent studies have continued supporting the idea that removing harmful senescent cells may improve healing. A 2025 scientific review described senescent cells as major contributors to skin aging and skin disease.
Another 2026 study tested a special wound dressing containing ABT-263 in diabetic mice. The treatment reduced senescent cells and improved healing without obvious toxic side effects in that model.
Still, scientists caution that senescent cells are not always harmful. Some studies suggest these cells may briefly help during the early stages of wound healing before becoming problematic later. This means future treatments will need to carefully control when and how senescent cells are removed.
The current study was performed in mice, so researchers still need to determine whether the treatment will work safely and effectively in humans. Human skin is more complex, and scientists will need to study proper dosing, long-term safety, and possible side effects before the treatment can be widely used.
Even so, the findings offer exciting possibilities for the future of wound care and healthy aging. Instead of simply treating symptoms after wounds become serious, doctors may eventually be able to help aging skin heal faster by removing the damaged cells that slow repair.
The study findings are important because they suggest aging skin may be improved by targeting senescent “zombie” cells directly. One major strength of the research is that the treatment improved healing speed in older mice without showing the same strong effects in younger mice, suggesting the therapy may specifically target aging tissue.
The study also supports growing evidence that senolytic drugs may help treat age-related conditions. However, the research is still early and limited to animal studies.
Scientists still need to determine whether topical ABT-263 is safe for humans and whether removing senescent cells could have unintended long-term effects. Future research may help develop safer and more precise treatments for wound healing and healthy aging.
If you care about skin health, please read studies about top signs of diabetic skin disease, and Mediterranean diet could help lower the skin cancer risk.
For more health information, please see recent studies about eating fish linked to higher risk of skin cancer, and results showing how to combat the effects of aging on your skin.
Source: Boston University.
