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Cell Population Analyses During Skin Carcinogenesis
Published on: August 21, 2013
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Characterization of Smad3 knockout mouse derived skin cells
Ke Liu1,2, Zhen Gao1, Guangdong Zhou1
1Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China.
In Vitro Cellular & Developmental Biology. Animal
|January 29, 2017
Summary
Smad3 knockout mice show improved skin wound healing with less inflammation. This is due to both systemic factors and enhanced intrinsic properties of their skin cells, including increased migration and proliferation.
Area of Science:
- Cell Biology
- Dermatology
- Immunology
Background:
- Transforming growth factor-beta (TGF-β) is crucial for skin wound healing, with Smad3 as a key signaling molecule.
- Smad3 knockout (KO) mice demonstrate accelerated wound healing and reduced inflammation, but the cellular mechanisms remain unclear.
Purpose of the Study:
- To investigate the biological behavior of skin cells from Smad3 KO mice.
- To elucidate the cellular mechanisms underlying enhanced wound healing in Smad3 KO mice.
Main Methods:
- Keratinocytes and dermal fibroblasts were isolated from Smad3 KO and wild-type (WT) mice.
- Cells were cultured in vitro for passage 1 and 2 for various functional assays.
- Serum and cell supernatant cytokine levels (TGF-β1, IL-6, IL-10) were measured.
- Gene expression of cytokines was analyzed.
- Cell migration, proliferation, and colony-forming efficiency were assessed.
Main Results:
- Smad3 KO serum and fibroblast supernatant showed higher TGF-β1 and lower IL-6/IL-10 levels compared to WT.
- KO fibroblasts exhibited significantly reduced gene expression of IL-6, IL-10, and TGF-β1.
- KO dermal fibroblasts displayed enhanced migration and proliferation.
- Both KO fibroblasts and keratinocytes demonstrated superior colony-forming efficiency compared to WT cells.
Conclusions:
- Systemic factors, including altered cytokine profiles in serum, contribute to enhanced wound healing in Smad3 KO mice.
- Intrinsic properties of Smad3 KO skin cells, such as increased migration, proliferation, and colony formation, play a significant role.
- These cellular and systemic changes collectively explain the accelerated wound healing and diminished inflammatory response observed in Smad3 KO mice.
