ATVB In Focus |
From the Division of Molecular Medicine, Department of Medicine, Columbia University, New York.
Correspondence to Dr Alan R. Tall, Columbia University, College of Physicians and Surgeons, 630 West 168th St, New York, NY 10032. E-mail art1@columbia.edu
An extract of the first 250 words of the full text is provided, because this article has no abstract. |
About 30 years ago, John Glomset1 outlined the reverse cholesterol transport hypothesis, proposing that HDL and LCAT might have anti-atherogenic functions related to their ability to transport cholesterol from peripheral tissues to the liver for excretion. As the different molecules and pathways mediating the various steps of reverse cholesterol transport have been discovered, this hypothesis has been sustained and refined. Much remains to be learned, particularly in relation to molecular mechanisms, regulation, and metabolic integration of the different steps of reverse cholesterol transport. The plot is already thick but undoubtedly there are many new molecular players waiting in the wings. A particular challenge is to manipulate reverse cholesterol transport therapeutically in a way that will reduce atherosclerosis and its complications.
See pages 712 and 720
This review series has been inspired by the discovery in 1999 by three different laboratories (led by Bodzioch et al,2 Rust et al,3 and Brooks-Wilson et al4) that Tangier Disease is caused by mutations in the ATP binding cassette transporter ABCA1, providing a new molecular key to understanding the mechanisms and regulation of cellular cholesterol efflux. In the first piece in the series, Yancey and colleagues5 from the Rothblat and Philips laboratory will describe three different pathways that may mediate cellular cholesterol efflux: aqueous diffusion, scavenger receptor BI (SR-BI)mediated efflux, and active cholesterol efflux mediated by ABCA1. Their review will discuss in detail various potential mechanisms that may be responsible for cholesterol efflux mediated by SR-BI or ABCA1, and the potential metabolic integration of
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