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Epidermal morphogenesis in an in-vitro model using a fibroblasts-embedded collagen scaffold
Yi-Chau Huang1, Tzu-Wei Wang, Jui-Sheng Sun
1Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan, ROC.
Journal of Biomedical Science
|October 18, 2005
Summary
This study introduces a novel 3D skin culture model. Modulating epidermal growth factor (EGF) timing is crucial for proper keratinocyte stratification and differentiation, impacting skin tissue development.
Area of Science:
- Tissue engineering
- Dermatology
- Cell biology
Background:
- Developing advanced skin equivalent models is crucial for studying cellular interactions.
- Understanding the role of growth factors like epidermal growth factor (EGF) in keratinocyte behavior is essential.
Purpose of the Study:
- To investigate the impact of epidermal growth factor (EGF) timing on keratinocyte behavior within a novel 3D skin culture system.
- To explore cell-cell and cell-matrix interactions influenced by growth factors and extracellular matrix components.
Main Methods:
- Utilized a novel bi-layer 3D collagen scaffold with distinct pore sizes and specific culture media.
- Keratinocytes were cultured in submerged conditions followed by air-liquid interface culture, with and without EGF.
- Analyzed keratinocyte stratification, differentiation, and cell-matrix interface organization.
Main Results:
- Epidermal growth factor (EGF) promoted keratinocyte migration and proliferation in the submerged stage.
- Continuous EGF addition during air-liquid interface culture led to disorganized, thin keratinocyte layers and uneven interfaces.
- Absence of excess EGF in the air-lifted stage facilitated proper stratification and differentiation into a multi-layered epidermis.
Conclusions:
- The timing and concentration of epidermal growth factor (EGF) significantly influence keratinocyte behavior and epidermal development.
- Optimal keratinocyte stratification and differentiation depend on controlled EGF signaling, modulated by paracrine/autocrine factors like KGF and TGF-beta1.
- This 3D skin culture model offers a valuable platform for investigating growth factor roles in skin biology.