Down-regulation of Type I Collagen Gene Expression in Human Skin Fibroblasts by G1 Cell Cycle Arrest / 대한피부과학회지
Korean Journal of Dermatology
;
: 362-368, 2007.
Article
in Korean
| WPRIM
| ID: wpr-72443
ABSTRACT
BACKGROUND:
Type I collagen is a major component of extracellular cellular matrix in tissue. It is synthesized by human skin fibroblasts. However, synthesis of type I collagen is markedly-decreased in senescent fibroblasts. In the cell cycle, the hallmark of senescent fibroblasts is a permanent G1 phase arrest. However it is largely unknown whether the expression of type I collagen protein is decreased by the G1 phase arrest in human skin fibroblasts after UVB irradiation, serum starvation, or mimosine, an inducer of the G1 phase arrest treatment.OBJECTIVE:
The purpose of this study was to investigate the expression of type I collagen protein in G1 phase- arrested human skin fibroblasts after UVB irradiation, serum starvation, and mimosine treatment.METHODS:
To induce G1 phase arrest in the cell cycle, human skin fibroblasts were irradiated by UVB (100, 200, 300 mJ/cm(2)), subjected to serum starvation for 5 days, or mimosine treatment (50, 100, 200 uM). The expressions of type I collagen protein were analyzed by Western blot analysis.RESULTS:
The G1 phase of cell populations were increased by a dose or time-dependent manner with UVB irradiation, serum starvation, and mimosine-treated human skin fibroblasts. The expression of type I collagen protein was markedly-decreased by UVB, serum starvation, and mimosine treatment.CONCLUSION:
The expression of type I collagen protein in human skin fibroblasts is decreased by UVB irradiation, serum starvation, and mimosine treatment through induction of G1 phase cell cycle arrest.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Skin
/
Starvation
/
Down-Regulation
/
Gene Expression
/
Cell Cycle
/
Blotting, Western
/
G1 Phase
/
Collagen Type I
/
Cell Cycle Checkpoints
/
G1 Phase Cell Cycle Checkpoints
Limits:
Humans
Language:
Korean
Journal:
Korean Journal of Dermatology
Year:
2007
Type:
Article
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