Antagonistic effects of tranilast on proliferation and collagen synthesis induced by TGF-beta2 in cultured human trabecular meshwork cells.
- Author:
Banghong DA
1
;
Yang CAO
;
Houren WEI
;
Zhixin CHEN
;
Yinbo SHUI
;
Zhongyu LI
Author Information
1. Department of Emergency, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
- Publication Type:Journal Article
- MeSH:
Cell Proliferation;
drug effects;
Cells, Cultured;
Collagen;
biosynthesis;
Humans;
Trabecular Meshwork;
cytology;
metabolism;
Transforming Growth Factor beta;
antagonists & inhibitors;
Transforming Growth Factor beta2;
ortho-Aminobenzoates;
pharmacology
- From:
Journal of Huazhong University of Science and Technology (Medical Sciences)
2004;24(5):490-496
- CountryChina
- Language:English
-
Abstract:
Whether tranilast had antagonistic effect on proliferation inhibition and collagen synthesis promotion induced by TGF-beta2 in cultured human trabecular meshwork cells was investigated. Suspension of 1 x 10(4) cultured human trabecular meshwork cells of 3-5 passage was distributed in each well of a 96-well disk and divided into control group and experimental group. After 24 h, 0 microg/ml (control), 12.5 microg/ml, 25 microg/ml, 50 microg/ml tranilast with 3.2 ng/ml TGF-beta2 were added into the incubation medium. Another 24 h later, proliferation and collagen synthesis in cultured human trabecular meshwork cells were examined respectively by using tetrazolium-based semiautomated colormetric (MTT) assay and 3H-proline incorporation with liquid scintillation technique. The results showed absorbance (A) values of the experimental groups were 0.9036 +/- 0.3017, 1.1361 +/-0.1352, 1.2457 +/- 0.1524 according to the different concentrations of tranilast, and 0.8956 +/-0.1903 of the control group. In comparison with the control group, 25 microg/ml (q'= 3.23, P< 0.05), 50 microg/ml (q'=4.70, P<0.01) tranilast significantly antagonized the decrease of the A values induced by TGF-beta2 in the cultured human trabecular meshwork cells. In comparison with the control group [817.37+/-124.21 cpm/10(4) cells], 12.5 microg/ml (620.33+/-80.46 cpm/10(4) cells, q'= 4.26, P<0.05), 25 microg/ml (594.58+/-88.13 cpm/10(4) cells, q'=4.81, P<0.01), 50 microg/ml (418.64+/-67.90 cpm/10(4) cells, q'=8.62, P<0.01) tranilast significantly inhibited the incorporation of 3H-proline into the cultured human trabecular meshwork cells promoted by TGF-beta2 in a dose-dependent manner. It was concluded that tranilast had the antagonistic effect on the proliferation inhibition and collagen synthesis promotion induced by TGF-alpha2 in the cultured human trabecular meshwork cells.
