As people age, their skin loses some of its ability to heal quickly. Small cuts and wounds that might heal in days for younger people can sometimes take weeks or even months in older adults.
Slow healing becomes especially dangerous after surgery or in people with chronic illnesses such as diabetes.
Doctors have long known that aging affects the skin, but scientists are still trying to understand exactly why older skin struggles to repair itself. A new study published in Aging (Aging-US) may provide an important clue.
Researchers at Boston University Aram V. Chobanian and Edward Avedisian School of Medicine found that removing certain damaged aging cells from the skin helped older mice heal wounds much faster.
The scientists focused on cells known as senescent cells. These cells are sometimes called “zombie cells” because they stop functioning normally but refuse to die. Instead of helping nearby tissue, they release chemicals that increase inflammation and interfere with normal healing.
Senescent cells naturally increase with age. Scientists believe they may play a role in wrinkles, tissue damage, chronic inflammation, and many diseases linked to aging.
To investigate whether these cells directly affect wound healing, researchers tested a drug called ABT-263. The drug belongs to a class of treatments called senolytics, which are designed to selectively remove senescent cells from the body.
The researchers applied ABT-263 directly onto the skin of older mice for five days. Afterward, they created small wounds and observed how the skin responded.
The results showed that the treated mice healed significantly faster than untreated mice. By the 24th day of the experiment, 80% of the treated mice had completely healed wounds, while only 56% of untreated mice fully healed during the same period.
The treatment also reduced several biological signs of aging in the skin.
Scientists discovered that important healing processes became more active after treatment. Genes linked to collagen production, tissue rebuilding, blood vessel formation, and wound closure all increased their activity.
Collagen is one of the skin’s most important structural proteins. It helps keep skin strong and flexible. As people age, collagen production slows down, which contributes to weaker skin and slower healing.
One surprising discovery involved inflammation. Most people think inflammation is always harmful, especially because chronic inflammation is strongly linked to aging and disease.
However, the study found that ABT-263 caused a short burst of inflammation that actually appeared to improve healing. Researchers believe this temporary inflammatory response may help activate repair systems that become sluggish in older skin.
Scientists explain that inflammation is not always bad. In healthy wound healing, the body needs some inflammation during the early stages to remove damaged tissue and begin repair. Problems occur when inflammation becomes chronic and never fully shuts off.
Another important part of the study is that the drug was used as a topical treatment instead of a pill. Oral senolytic drugs travel through the entire body and may cause side effects in organs unrelated to the skin.
Applying the drug directly onto the skin may allow doctors to target aging tissue more precisely while reducing the risk of widespread side effects.
Interestingly, the treatment appeared to work mainly in older tissue. Young mice did not show the same strong response, suggesting the therapy may specifically target skin where senescent cells have accumulated with age.
The findings could eventually help improve recovery after surgery, injuries, burns, or chronic wounds in older adults. Slow healing is a major medical challenge because wounds that remain open for long periods are more likely to become infected or develop complications.
Researchers hope future treatments may one day prepare aging skin before surgery so patients can recover faster and with fewer complications.
The study also fits into a broader area of anti-aging research that has gained major scientific interest in recent years. Scientists are increasingly studying senescent cells because they appear to contribute to many diseases associated with aging.
Researchers are exploring whether senolytic treatments could someday help conditions involving arthritis, cardiovascular disease, lung disease, diabetes complications, and even neurodegenerative disorders.
More recent research has continued supporting the idea of targeted senolytic therapy. A 2025 scientific review described senescent cells as important contributors to skin aging and chronic skin disease.
Another study in 2026 tested a wound dressing containing ABT-263 in diabetic mice and found that it improved wound healing without obvious toxic effects.
At the same time, scientists caution that senescent cells may sometimes have useful functions during the early stages of healing. The challenge for future treatments will be removing harmful lingering cells without interfering with the body’s normal repair process.
The researchers emphasize that the current findings are still early because the experiments were performed in mice rather than humans. More studies are needed to understand long-term safety, ideal dosing, and whether the treatment will work similarly in human skin.
Still, the study offers exciting hope for the future of wound healing and healthy aging. By targeting the damaged cells that build up over time, scientists may eventually develop treatments that help older skin repair itself faster and more effectively.
The findings are important because they suggest aging skin may heal better if harmful senescent cells are selectively removed before injury occurs. One strength of the study is that researchers directly measured wound healing improvements after treatment and identified biological pathways linked to tissue repair.
The work also supports growing interest in localized senolytic therapies that may reduce side effects compared with whole-body treatments.
However, because the research was performed in mice, scientists still do not know whether the same benefits and safety profile will apply to humans. Future research will need to determine the best timing, dosage, and long-term effects of senolytic skin treatments before they can be used clinically.
If you care about skin health, please read studies about eating fish linked to higher risk of skin cancer, and Vitamin B3 could help prevent skin cancers.
For more health information, please see recent studies about vegetable oil linked to spread of cancer, and results showing Vitamin D could help treat skin inflammation.
