Inflammation stimulates the expression of PCSK9.

Inflammation stimulates the expression of PCSK9.
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DOI:
10.1016/j.bbrc.2008.07.023
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发表时间:
2008-09-19
影响因子:
3.1
通讯作者:
Grunfeld, Carl
Grunfeld, Carl
中科院分区:
生物学4区
文献类型:
--
作者:
Feingold, Kenneth R.;Moser, Arthur H.;Shigenaga, Judy K.;Patzek, Sophie M.;Grunfeld, Carl

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炎症引起脂质和脂蛋白代谢的显著变化。蛋白转化酶枯草素激酶9 (PCSK9)在调节LDL受体降解中起重要作用。本研究表明,LPS降低了肝脏LDL受体蛋白,但同时肝脏LDL受体mRNA水平并未降低。因此,我们探讨了LPS对PCSK9表达的影响。LPS导致肝脏PCSK9 mRNA水平显著升高(4小时-2.5倍;38小时-12.5倍)。PCSK9的增加是一种敏感反应,1 ug LPS诱导1 / 2的最大反应。LPS也增加了PCSK9在肾脏中的表达。最后,酶聚糖和松节油等其他诱导炎症的处理也刺激了PCSK9的肝脏表达。因此,炎症刺激PCSK9表达,导致LDL受体降解增加,LDL受体减少,从而增加血清LDL,这可能对宿主防御有有益作用。
Inflammation induces marked changes in lipid and lipoprotein metabolism. Proprotein convertase subtilisin kexin 9 (PCSK9) plays an important role in regulating LDL receptor degradation. Here we demonstrate that LPS decreases hepatic LDL receptor protein but at the same time hepatic LDL receptor mRNA levels are not decreased. We therefore explored the effect of LPS on PCSK9 expression. LPS results in a marked increase in hepatic PCSK9 mRNA levels (4 hours-2.5 fold increase; 38 hours-12.5 fold increase). The increase in PCSK9 is a sensitive response with 1 ug LPS inducing a ½ maximal response. LPS also increased PCSK9 expression in the kidney. Finally, zymosan and turpentine, other treatments that induce inflammation, also stimulated hepatic expression of PCSK9. Thus, inflammation stimulates PCSK9 expression leading to increased LDL receptor degradation and decreasing LDL receptors thereby increasing serum LDL, which could have beneficial effects on host defense.
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