#22 – Tom Dayspring Part III of V: reverse cholesterol transport, CETP inhibitors, & apolipoproteins

Pathways

Thomas Dayspring explains the intricate pathways of reverse cholesterol transport, emphasizing that it's more nuanced than traditionally taught. He highlights that HDL particles, once thought to solely transport cholesterol back to the liver, actually have multiple pathways, including direct and indirect routes involving various organs like the liver, intestine, and adrenal glands 1. Dayspring notes, "HDL can give its cholesterol to an LDL to a VLDL, to a Chylamicron, to an Idl," illustrating the complexity of lipid transport 1. This understanding challenges the simplistic view of HDL's role in cholesterol management 2.

   

Misconceptions

Common misconceptions about reverse cholesterol transport are debunked by Dayspring, who argues that the term itself is outdated due to the complexity of lipid transport. He stresses the need for specific biomarkers to evaluate cholesterol transport pathways effectively 3. Dayspring compares HDL subpopulations to fire trucks, each with unique roles, saying, "Your HDL subpopulations show up where they're needed" 3. This analogy underscores the importance of understanding the diverse functions of HDL particles beyond simple cholesterol transport.