Xiangmei Chen, Wenhu Liu, Jianzhong Wang, Xiaodan Wang, Zhiheng Yu 

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STAT1 and STAT3 mediate thrombin-induced expression of TIMP-1 in human glomerular mesangial cells  Xiangmei Chen, Wenhu Liu, Jianzhong Wang, Xiaodan Wang, Zhiheng Yu  Kidney International  Volume 61, Issue 4, Pages 1377-1382 (April 2002) DOI: 10.1046/j.1523-1755.2002.00283.x Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 1 Thrombin induced tissue inhibitor of metalloproteinase-1 (TIMP-1) in a dose-dependent manner. Cells were harvested after incubation with thrombin and/or hirudin for six hours. Lanes are: (1) control; (2–4) cells incubated with thrombin at 0.5, 1.5, and 4.5 U/mL, respectively; (5) cells treated with thrombin 4.5 U/mL plus hirudin 9 U/mL; (6) cells incubated with hirudin 9 U/mL only. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 2 Thrombin induced TIMP-1 mRNA expression in a time-dependent manner. Cells were harvested after incubation with 4.5 U/mL thrombin for 0 hour (lane 1), 0.5 hours (lane 2), 1 hour (lane 3), 3 hours (lane 4), 6 hours (lane 5), and 12 hours (lane 6). Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 3 Thrombin induced STAT-DNA binding in a dose-dependent manner. Cells were harvested after incubation with thrombin for six hours. Lanes are: (1) control; (2–5) cells incubated with thrombin at 0.5, 1.5, 3.0 and 4.5 U/mL, respectively. In lane 6, a 50-fold molar excess of unlabeled competitor probe was added as a cold competitor. Lanes 7–9, the radiolabeled m67 probe mutants 1, 2, and 3 did not form complexes with nuclear extracts from 4.5 U/mL thrombin-treated cells. Polyclonal anti-STAT1 (lane 10) or anti-STAT3 (lane 11) antibodies were added to nuclear extracts from cells pretreated with 4.5 U/mL thrombin prior to the addition of the probes. The sis-inducible factor (SIF) complex and the supershifted complex are indicated by the asterisk. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 4 Thrombin-induced STAT-DNA binding in a time-dependent manner. Cells were harvested after being incubated with 4.5 U/mL thrombin for 0 hour (lane 1), 0.5 hours (lane 2), 1 hour (lane 3), 3 hours (lane 4), 6 hours (lane 5). In lane 6, a 50-fold molar excess of unlabeled competitor probe was added as a cold competitor. Lanes 7–9, the radiolabeled m67 probe mutants 1, 2, and 3 did not form complexes with nuclear extracts from 4.5 U/mL thrombin-treated cells. Polyclonal anti-STAT1 (lane 10) or anti-STAT3 (lane 11) antibodies were added to nuclear extracts from cells pretreated with 4.5 U/mL thrombin prior to the addition of the probes. The sis-inducible factor (SIF) complex and the supershifted complex are indicated by the asterisk. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 5 STAT1 antisense inhibited STAT-DNA binding activity in glomerular mesangial cells. Subconfluent mesangial cells were deprived of serum for 12 hours, and the medium was changed to serum-free RPMI 1640, which contained 3 μmol/L antisense oligonucleotides in 10 mg/mL lipofectin and incubated for 10 hours before adding thrombin. As controls, cells received serum-free RPMI 1640 medium containing lipofectin with or without 3 μmol/L sense, or scrambled oligonucleotides. Cells were harvested after incubation with thrombin and/or hirudin for 6 hours. Lanes are: (1) control; (2) thrombin 4.5 U/mL; (3) thrombin 4.5 U/mL plus hirudin 9 U/mL; (4) antisense 3 μmol/L; (5) sense 3 μmol/L; (6) thrombin 4.5 U/mL plus antisense 3 μmol/L; (7) thrombin 4.5 U/mL plus sense 3 μmol/L; (8) 50-fold molar excess of unlabeled competitor probe as cold probes; (lanes 9 to 11) radiolabeled mutant probes 1, 2 and 3; (12) scrambled oligonucleotides 3 μmol/L; (13) anti-STAT1 antibody; (14) anti-STAT3 antibody. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 6 STAT3 antisense also inhibited STAT-DNA binding activity in glomerular mesangial cells. Cells were incubated in the serum-free RPMI 1640 containing 3 μmol/L antisense oligonucleotides in 10 mg/mL lipofectin and incubated for 10 hours before adding thrombin 4.5 U/mL. As controls, cells received serum-free RPMI 1640 medium containing lipofectin with/without 3 μmol/L sense, or scrambled oligonucleotides. Cells were harvested after having been incubated with thrombin and/or hirudin for six hours. Lanes are: (1) control; (2) thrombin 4.5 U/mL; (3) thrombin 4.5 U/mL plus hirudin 9 U/mL; (4) antisense 3 μmol/L; (5) sense 3 μmol/L; (6) thrombin 4.5 U/mL plus antisense 3 μmol/L; (7) thrombin 4.5 U/mL plus sense 3 μmol/L; (8) 50-fold molar excess of unlabeled competitor probe as cold probes; (lanes 9 to 11) radiolabeled mutant probes 1, 2 and 3; (12) scrambled oligonucleotides 3 μmol/L; (13) anti-STAT1 antibody; (14) anti-STAT3 antibody. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions

Figure 7 STAT1 and STAT3 antisense oligonucleotides inhibited thrombin-induced TIMP-1 mRNA expression in glomerular mesangial cells. Cells were incubated in the serum-free RPMI 1640 containing 3 μmol/L antisense oligonucleotides in 10 mg/mL lipofectin and incubated for 10 hours before adding thrombin 4.5 U/mL. As controls, cells received serum-free RPMI 1640 medium containing lipofectin with/without 3 μmol/L sense, or scrambled oligonucleotides. Cells were harvested after having been incubated with thrombin and/or hirudin for six hours. Lanes are: (1) control; (2) thrombin 4.5 U/mL; (3) STAT3 antisense 3 μmol/L; (4) STAT3 antisense 3 μmol/L plus thrombin 4.5 U/mL; (5) STAT3 sense (3 μmol/L plus thrombin 4.5 U/mL); (6) STAT1 antisense 3 μmol/L; (7) STAT1 antisense 3 μmol/L plus thrombin 4.5 U/mL; (8) STAT1 sense 3 μmol/L plus thrombin 4.5 U/mL; (9) scrambled oligonucleotide 3 μmol/L. Kidney International 2002 61, 1377-1382DOI: (10.1046/j.1523-1755.2002.00283.x) Copyright © 2002 International Society of Nephrology Terms and Conditions