Related Experiment Video
Updated: Jun 21, 2026
07:32
Human Ex vivo Wound Model and Whole-Mount Staining Approach to Accurately Evaluate Skin Repair
Published on: February 17, 2021
Targeting Cellular Senescence Enhances Post-Burn Wound Healing in Aged Mice
Sara Faour1,2,3,4,5, Fadi Khalaf4,5,6,7, Yufei Chen4,5,8
1Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
Shock (Augusta, Ga.)
|June 19, 2026
Summary
Cellular senescence, a hallmark of aging, impairs burn wound healing in older adults. Senolytic therapy with Dasatinib and Quercetin improved skin repair in aged mice, suggesting a new treatment strategy.
Area of Science:
- Gerontology
- Wound Healing
- Cellular Biology
Background:
- Older burn patients face high mortality due to impaired wound healing.
- Mechanisms of age-related delayed burn repair are poorly understood.
- Cellular senescence, linked to aging, may impair tissue regeneration.
Purpose of the Study:
- Investigate the role of cellular senescence in post-burn wound repair in aged mice.
- Assess if senolytic treatment (Dasatinib and Quercetin) improves healing in aged burn mice.
Main Methods:
- Utilized adult and aged murine full-thickness scald burn models.
- Evaluated senescence markers (SA-β-Gal) and wound healing indicators (α-SMA, Col1a1).
- Administered senolytic treatment to aged burn mice.
Main Results:
- Burn injury increased senescence markers and delayed healing in aged mice.
- Senolytic treatment significantly reduced cellular senescence (4.4-fold decrease).
- Senolytics improved myofibroblast markers and macroscopic wound healing in aged mice.
Conclusions:
- Cellular senescence is associated with impaired skin repair after burn injury in aged individuals.
- Senescence-targeting therapies show potential for improving burn wound healing outcomes in older patients.
Related Concept Videos
01:19The Effect of Aging on Tissues
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
01:23Tissue Renewal without Stem Cells
After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
However, failure of such a system...
01:19Clinical Applications of Epidermal Stem Cells
Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own EpiSCs...