Related Experiment Video
Updated: Jul 15, 2026
12:18
A Murine Model of a Burn Wound Reconstructed with an Allogeneic Skin Graft
Published on: August 8, 2020
Skin grafting impairs postsynaptic cutaneous vasodilator and sweating responses
Scott L Davis1, Manabu Shibasaki, David A Low
1Institute for Exercise & Environmental Medicine, Presbyterian Hospital of Dallas, 7232 Greenville Avenue, Suite 435, Dallas, Texas 75231, USA.
Summary
Split-thickness skin grafts show impaired blood vessel and sweat gland function 5-9 months post-surgery. Endothelial-dependent responses to acetylcholine were reduced, while sweat gland activity was significantly attenuated in grafted skin.
Area of Science:
- Dermatology
- Physiology
- Vascular Biology
Background:
- Split-thickness skin grafting is a common surgical procedure for covering large wounds.
- The functional recovery of grafted skin, particularly its microcirculation and adnexal structures, remains incompletely understood.
- Assessing the postsurgical functional status of grafted skin is crucial for patient outcomes.
Purpose of the Study:
- To investigate the hypothesis that postsynaptic cutaneous vascular responses and sweat gland function are impaired in split-thickness grafted skin.
- To compare endothelial-dependent and -independent vasodilation in grafted versus adjacent control skin.
- To evaluate sweat gland function in grafted skin following surgical intervention.
Main Methods:
- Utilized intradermal microdialysis in grafted and adjacent control skin to deliver acetylcholine (endothelial-dependent vasodilator) and sodium nitroprusside (endothelial-independent nitric oxide donor).
- Measured skin blood flow using laser Doppler and calculated cutaneous vascular conductance (CVC).
- Assessed sweat rate and modeled dose-response curves to determine the concentration causing 50% of the maximal response (EC50).
Main Results:
- A significant rightward shift in the CVC dose-response curve for acetylcholine was observed in grafted skin compared to control skin (P = .003).
- The EC50 for sodium nitroprusside was not significantly different between grafted and control skin.
- Sweating responses to acetylcholine were minimal in grafted skin, whereas normal sweating occurred in control skin.
Conclusions:
- Endothelial-dependent cutaneous vasodilator responses are impaired in split-thickness grafted skin 5 to 9 months after surgery.
- Sweat gland function is significantly attenuated or absent in grafted skin during this postsurgical period.
- These findings highlight functional deficits in grafted skin that may impact thermoregulation and overall skin health.
Related Concept Videos
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...
01:22Burn Injuries
Burn injuries occur when the skin and underlying tissues are damaged due to exposure to heat, electricity, chemicals, radiation, or friction. They can vary in severity, from minor superficial burns to severe deep burns that can be life-threatening.
The damage results in the death of skin cells, which can lead to a massive loss of fluid. Dehydration, electrolyte imbalance, and renal and circulatory failure follow, which can be fatal. Burn patients are treated with intravenous fluids to offset...
The damage results in the death of skin cells, which can lead to a massive loss of fluid. Dehydration, electrolyte imbalance, and renal and circulatory failure follow, which can be fatal. Burn patients are treated with intravenous fluids to offset...
01:24Healing II: Complications
Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...