[To transdifferentiate human hypertrophic scar fibroblasts induced by connective tissue growth factor mediated transforming growth factor-beta 1 in vitro].
OBJECTIVE
To investigate the role of connective tissue growth factor (CTGF) induced TGF-beta 1 in the transdifferentiation of human hypertrophic scar fibroblast (HSFb).


METHODS
Human hypertrophic scar fibroblasts were cultured in vitro, 5 cell samples were stimulated with TGF-beta 1 (0, 2.5, 5.0, 7.5, 10.0 ng/mL, respectively) for 48 hours; other cell samples were divided into: normal control (NC) group, CTGF group (with addition of 10 ng/mL rhCTGF into culture medium), TGF-beta 1 group (with addition of 10 ng/mL TGF-beta 1 into culture medium), CTGF ASODN group (with addition of 10% FBS-DMEM after transfection of CTGF ASODN), CTGF ASODN + TGF-beta 1group (with addition of 10 ng/mL TGF-beta 1 after transfection of CTGF ASODN). Expression of CTGF was determined by Western blotting with stimulation of different concentration of TGF-beta 1. Expression of alpha-smooth muscle actin (alpha-SMA) was measured by Western blotting. Positive cell rate of alpha-SMA was examined by flow cytometry.


RESULTS
With stimulation of 10.0 ng/mL TGF-beta 1, the expression of CTGF was obviously higher than that of non-stimulation (P < 0.05). Expression of alpha-SMA in the CTGF group and the TGF-beta 1 group was obviously higher than that in NC group (P < 0.01), while there was no obvious difference among NC, CTGF ASODN, CTGF ASODN + TGF-beta 1 groups (P > 0.05). The positive cell rate of alpha-SMA in NC, CTGF, TGF-beta 1, CTGF ASODN, CTGF ASODN + TGF-beta 1 groups was (10.8 +/- 2.8)%, (29.1 +/- 4.0)%, (28.7 +/- 4.8)%, (10.7 +/- 2.3)%, (14.3 +/- 2.9)%, respectively, which was similar to expression of alpha-SMA on statistic analysis.


CONCLUSIONS
CTGF is one of the most important downstream efforts for TGF-beta 1 in inducing the transdifferentiation of HSFb.
Li
Zhe
Z
Department of Plastic Surgery, Southwest Hospital, the Third Military Medical University, Chongqing 400038, China.
Li
Shi-rong
SR
Liu
Jian-yi
JY
Dai
Xia
X
Tao
Ling
L
D002454:Cell Differentiation / Q000187:drug effects*; D002478:Cells, Cultured; D017439:Cicatrix, Hypertrophic / Q000378:metabolism*; D055513:Connective Tissue Growth Factor / Q000494:pharmacology*; D005347:Fibroblasts / Q000166:cytology* / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D053773:Transforming Growth Factor beta1 / Q000494:pharmacology*
D053773:Transforming Growth Factor beta1; D055513:Connective Tissue Growth Factor