LDL stimulates collagen mRNA synthesis in mesangial cells through induction of PKC and TGF-β expression.
LDL stimulates collagen mRNA synthesis in mesangial cells through induction of PKC and TGF-β expression.
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LDL 通过诱导 PKC 和 TGF-β 表达来刺激系膜细胞中胶原蛋白 mRNA 的合成。
DOI:
10.1152/ajprenal.1999.277.3.f369
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Y. S. Kim
中科院分区:
文献类型:
--
作者:
Hyun Soon Lee;B. Kim;H. Hong;Y. S. Kim
Abnormal lipid accumulation in glomeruli could be implicated in the pathogenesis of glomerulosclerosis. Low-density lipoprotein (LDL) stimulates collagen mRNA expression in cultured human mesangial cells (HMC). To explore the possible molecular mechanisms by which LDL promotes collagen gene expression, we examined the effects of LDL on protein kinase C (PKC) activity and transforming growth factor-β (TGF-β) expression in relation to collagen gene regulation in HMC. LDL (200 μg/ml) induced an acute increase in PKC activity, particularly PKC-α and -δ, within 15 min, which decreased to control value at 2 h. LDL stimulated TGF-β1, and α1(I) and α1(IV) collagen mRNA expression within 30 min of incubation with HMC, and levels remained elevated until hour 4. LDL induced the secretion of TGF-β by HMC. This TGF-β was shown by CCL-64 mink lung cell assay to be, in part, bioactive. The stimulatory effects of LDL on collagen gene regulation in HMC were blocked by the inhibition of PKC using GF-109203X (GFX) or the downregulation of PKC using phorbol myristate acetate. Neutralizing antibody to TGF-β inhibited the increased collagen mRNA expression by HMC exposed to LDL. The downregulation or inhibition of PKC did not affect the stimulatory effect of LDL on TGF-β mRNA or protein expression. These results suggest that in HMC, LDL stimulates collagen mRNA expression through the rapid activation of PKC-α and -δ and transcriptional upregulation of TGF-β. Thus PKC and TGF-β may function as independent key signaling intermediaries in the pathway by which LDL upregulates collagen gene expression in HMC.
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DOI:
10.1016/s0021-9258(18)98674-6
发表时间:
1991-08
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
E. Cagliero;T. Roth;S. Roy;M. Maiello;M. Lorenzi
通讯作者:
E. Cagliero;T. Roth;S. Roy;M. Maiello;M. Lorenzi
影响因子:
15.9
作者:
KAGAMI, S;BORDER, WA;NOBLE, NA
通讯作者:
NOBLE, NA
影响因子:
15.9
作者:
ZIYADEH, FN;SHARMA, K;WOLF, G
通讯作者:
WOLF, G
DOI:
10.1172/jci113996
发表时间:
1989
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
MacKay,K;Striker,LJ;Stauffer,JW;Doi,T;Agodoa,LY;Striker,GE
通讯作者:
Striker,GE
DOI:
--
发表时间:
1991
期刊:
The American journal of pathology
影响因子:
--
作者:
Coimbra,T;Wiggins,R;Noh,JW;Merritt,S;Phan,SH
通讯作者:
Phan,SH