Biliary sterol secretion is not required for macrophage reverse cholesterol transport.
Biliary sterol secretion is not required for macrophage reverse cholesterol transport.
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DOI:
10.1016/j.cmet.2010.05.011
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发表时间:
2010-07-07
期刊:
影响因子:
29
通讯作者:
Brown JM
中科院分区:
文献类型:
--
作者:
Temel RE;Sawyer JK;Yu L;Lord C;Degirolamo C;McDaniel A;Marshall S;Wang N;Shah R;Rudel LL;Brown JM
Recent evidence suggests that the intestine may play a direct facilitative role in reverse cholesterol transport (RCT), independent of hepatobiliary secretion. In order to understand the non-biliary pathway for RCT we created both genetic and surgical models of biliary cholesterol insufficiency. To genetically inhibit biliary cholesterol secretion we generated mice in which Niemann-Pick C1-Like 1 (NPC1L1) was overexpressed in the liver. Compared to controls, NPC1L1Liver-Tg mice exhibit a > 90% decrease in biliary cholesterol secretion, yet mass fecal sterol loss and macrophage RCT is normal. To surgically inhibit biliary emptying into the intestine, we have established an acute biliary diversion model. Strikingly, macrophage RCT persists in mice surgically lacking the ability to secrete bile into the intestine. Collectively, these studies demonstrate that mass fecal sterol loss and macrophage RCT can proceed in the absence of biliary sterol secretion, challenging the obligate role of bile in RCT.
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