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Effect of Smad7 gene modified BMSCs to TGF-β signal conduction in hepatic stellate cells / 中国免疫学杂志
Chinese Journal of Immunology ; (12): 1441-1445, 2016.
Article in Chinese | WPRIM | ID: wpr-504375
ABSTRACT

Objective:

To investigate the mechanism of Smad7 gene modified bone marrow mesenchymal stem cells ( Smad7-BMSCs) to prevent hepatic fibrosis in vitro.

Methods:

Smad7-EGFP-BMSCs were established by isolating and purifying BMSCs of rats, and transfecting Ad-Smad7-EGFP. HSC-T6 were divided into Group A, Group B, Group C and Group D, which were respectively incubated with Smad7-EGFP-BMSCs, BMSCs, Smad7 plasmid and PBS for 72 hours. The level of Smad7and TGF-β1protein in the culture solution was determined by ELISA. The expression of mRNA and protein of Smad7,TGF-β1,Col Ⅰ and α-SMA in the hepatic stellate cells were respectively determined by Western blot and RT-PCR. Cellular apoptosis was determined by flow cytometry.

Results:

(1)The results of ELISA showed that the level of TGF-β1 protein decreased(P<0. 01) but the level of Smad7 protein increased (P<0. 01) in Group B,Group C and Group D compared with Group A;the level of TGF-β1 protein decreased(P<0. 01) but the level of Smad7 protein increased (P<0. 01) in Group D compared with Group B and Group C. (2)The results of Western blot and RT-PCR showed that the level of mRNA and protein of Smad7,TGF-β1,Col Ⅰ and α-SMA decreased(P<0. 01) but the level of mRNA and protein of Smad7 protein increased (P<0. 01) in Group B,Group C and Group D compared with Group A;the level of mRNA and protein of Smad7,TGF-β1,ColⅠandα-SMA decreased(P<0. 01) but the level of mRNA and protein of Smad7 protein increased (P<0. 01) in Group D compared with Group B and Group C. (3)The results of flow cytometry showed that the rate of cellular apoptosis de-creased(P<0. 01),but the level of Smad7 protein increased (P<0. 01) in Group B,Group C and Group D compared with Group A;the rate of cellular apoptosis decreased(P<0. 01)in Group D compared with Group B and Group C.

Conclusion:

Smad7-BMSCs can have the effect of anti-hepatic fibrosis by affecting TGF-β1 signal pathway and promoting cellular apoptosis in hepatic stellate cells.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Immunology Year: 2016 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Immunology Year: 2016 Type: Article