Skin-resident stem cells and wound healing
Yohei Iwata1, Hirohiko Akamatsu2, Yuichi Hasebe3,4
1Department of Dermatology, Fujita Health University School of Medicine.
Summary
CD271 stem cells in the skin are crucial for wound healing. Their reduced presence in chronic ulcers highlights their importance in skin repair and regeneration.
Area of Science:
- Dermatology
- Stem Cell Biology
- Regenerative Medicine
Background:
- CD271 is a recognized stem cell marker in both epidermal and dermal layers.
- Understanding the role of CD271+ cells in wound healing is essential for addressing chronic skin conditions.
Purpose of the Study:
- To investigate the dynamic behavior of epidermal and dermal CD271+ cells during wound healing.
- To explore the potential involvement of CD271+ cells in the pathogenesis of chronic skin ulcers.
Main Methods:
- Assessed the kinetic movement and proliferation of CD271+ cells in a wound healing model.
- Analyzed gene expression of growth factors (e.g., TGFβ2, VEGFα, FGF2, EGF, PDGFB, TGFβ1) in purified CD271+ and CD271- cells.
- Compared wound healing and CD271+ cell dynamics in young versus aged mice.
- Examined CD271+ cell levels in chronic skin ulcer patients versus healthy controls.
Main Results:
- Epidermal CD271+ cells proliferated and migrated early in wound healing, expressing higher TGFβ2 and VEGFα.
- Aged mice exhibited delayed wound healing and delayed dermal CD271+ cell accumulation, with lower expression of key healing factors.
- Dermal CD271+ cells produced significant growth factors including FGF2, EGF, PDGFB, and TGFβ1.
- Chronic skin ulcer patients showed significantly reduced epidermal and dermal CD271+ cells compared to healthy individuals.
Conclusions:
- Epidermal and dermal CD271+ stem cells are integral to the wound healing process, likely through the production of critical growth factors.
- The diminished presence of CD271+ cells in chronic ulcers suggests their crucial role in impaired skin repair.
- Targeting or augmenting CD271+ stem cell function may offer therapeutic potential for chronic wounds.
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