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International Textbook of Diabetes Mellitus, 4th Ed., Excerpt #90: Lipid and Lipoprotein Metabolism, Hypolipidemic Agents, and Therapeutic Goals Part 2

Lipoprotein metabolism in normal individuals and in type 2 diabetes mellitus: Triglyceride levels in blood are regulated by the size and number of VLDL secreted from the liver and the efficiency with which triglycerides are cleared from the plasma by lipoprotein lipases. In T2DM, greater numbers of larger, more triglyceride-enriched VLDL are secreted from the liver and lipoprotein lipase activity may be modestly reduced; both lead to increased levels of triglyceride in the blood. HDL cholesterol levels are reduced for several reasons, including increased transfer of that cholesterol to very low- and low-density lipoprotein, in exchange for their triglyceride, by cholesterol ester transfer protein. LDL particles lose some of their cholesterol to VLDL via the same exchange mechanism, which generate smaller, denser, LDL.

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