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Early histological and ultrastructural changes in expanded murine scalp
Zhou Yu1, Shiqiang Liu1, Jiangbo Cui1
1Department of Plastic Surgery, Xijing Hospital; Air Force Medical University, Xi'an, Shaanxi Province, China.
Ultrastructural Pathology
|January 29, 2020
Summary
Early histological and ultrastructural changes in mouse scalp tissue expansion reveal epidermal thickening and dermal thinning. Monitoring these changes is crucial for successful tissue regeneration in reconstructive surgery.
Area of Science:
- Plastic Surgery
- Regenerative Medicine
- Histology and Ultrastructure
Background:
- Tissue expansion is a common technique in plastic, reconstructive, and aesthetic surgeries.
- Mouse scalp expansion models mimic human skin expansion characteristics.
- Detailed early ultrastructural changes in expanded scalp tissue remain understudied.
Purpose of the Study:
- To investigate the early histological and ultrastructural changes in expanded mouse scalp tissue.
- To characterize cellular and extracellular matrix alterations during tissue expansion.
Main Methods:
- Establishment of a mouse scalp expansion model.
- Collection of expanded scalp samples at 2 days (Group I) and 4 days (Group II) post-final injection.
- Histological and ultrastructural analyses of tissue samples.
Main Results:
- Histology showed epidermal and subcutaneous fat thinning, dermal thinning, and capsule formation.
- Ultrastructural findings included keratinocyte changes, damaged mitochondria, ruptured collagen fibers, and increased fibroblasts/myofibroblasts.
- Adipocyte dedifferentiation was observed in both groups; autophagosomes were present in Group I dermal fibroblasts.
Conclusions:
- Early monitoring of expanded tissue changes, such as dermal thinning, is essential.
- Understanding these early cellular and structural alterations can guide strategies to promote tissue regeneration and improve surgical outcomes.
