LXR regulates cholesterol uptake through Idol-dependent ubiquitination of the LDL receptor.

LXR regulates cholesterol uptake through Idol-dependent ubiquitination of the LDL receptor.
复制标题

DOI:
10.1126/science.1168974
复制
发表时间:
2009-07-03
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Tontonoz P
Tontonoz P
中科院分区:
其他
文献类型:
--
作者:
Zelcer N;Hong C;Boyadjian R;Tontonoz P

文献摘要

参考文献

被引文献

相似文献

细胞胆固醇水平反映了摄取、流出和内源性合成之间的平衡。在这里,我们表明,甾醇反应性核受体LXR有助于维持胆固醇稳态,不仅通过促进胆固醇流出,而且通过抑制低密度脂蛋白(LDL)的摄取。LXR通过Idol(LDLR的诱导性降解物)的转录诱导抑制LDL受体(LDLR)途径,Idol是一种E3泛素连接酶,可触发LDLR在其胞质结构域上的泛素化,从而靶向其降解。LXR配体以组织选择性方式降低体内LDLR蛋白水平,而LXR敲除则增加体内LDLR蛋白水平。肝细胞中的Idol敲低增加LDLR蛋白水平并促进LDL摄取。相反,腺病毒介导的Idol在小鼠肝脏中的表达促进LDLR降解并升高血浆LDL水平。LXR-Idol-LDLR轴定义了固醇应答元件结合蛋白的互补途径,用于胆固醇摄取的固醇调节。
Cellular cholesterol levels reflect a balance between uptake, efflux and endogenous synthesis. Here we show that the sterol-responsive nuclear receptor LXR helps maintain cholesterol homeostasis not only through promotion of cholesterol efflux, but also through suppression of low-density lipoprotein (LDL) uptake. LXR inhibits the LDL receptor (LDLR) pathway through transcriptional induction of Idol (Inducible Degrader of the LDLR), an E3 ubiquitin ligase that triggers ubiquitination of the LDLR on its cytoplasmic domain, thereby targeting it for degradation. LXR ligand reduces, whereas LXR knockout increases, LDLR protein levels in vivo in a tissue-selective manner. Idol knockdown in hepatocytes increases LDLR protein levels and promotes LDL uptake. Conversely, adenovirus-mediated expression of Idol in mouse liver promotes LDLR degradation and elevates plasma LDL levels. The LXR-Idol-LDLR axis defines a complementary pathway to sterol response element binding proteins for sterol regulation of cholesterol uptake.
DOI: 10.1073/pnas.182199799
发表时间: 2002-09-03
影响因子: 11.1
作者:
Tangirala, RK;Bischoff, ED;Schulman, IG
通讯作者: Schulman, IG
DOI: 10.1126/science.3513311
发表时间: 1986-04-04
期刊: SCIENCE
影响因子: 56.9
作者:
BROWN, MS;GOLDSTEIN, JL
通讯作者: GOLDSTEIN, JL
DOI: 10.1016/s0014-5793(03)01010-x
发表时间: 2003-10-09
期刊: FEBS LETTERS
影响因子: 3.5
作者:
Bornhauser, BC;Johansson, C;Lindholm, D
通讯作者: Lindholm, D
DOI: 10.1074/jbc.m410077200
发表时间: 2004-11-26
影响因子: 4.8
作者:
Park, SW;Moon, YA;Horton, JD
通讯作者: Horton, JD
DOI: 10.1073/pnas.90.24.11603
发表时间: 1993-12-15
影响因子: 11.1
作者:
HUA, XX;YOKOYAMA, C;WANG, XD
通讯作者: WANG, XD