HDL functionality
The qualitative assessment of HDL cholesterol's protective functions beyond its quantitative measurement.
Full Definition
HDL functionality refers to the qualitative assessment of how effectively HDL cholesterol performs its atheroprotective functions, rather than simply measuring HDL quantity. Key functional properties include reverse cholesterol transport, anti-inflammatory effects, antioxidant capacity, and endothelial protective functions. Research has shown that HDL particles can become dysfunctional in certain disease states, losing their protective properties or even becoming pro-inflammatory. Assessment of HDL functionality may include measures such as cholesterol efflux capacity, HDL inflammatory index, or paraoxonase activity.
Usage
Usage note: Distinguish from simple HDL cholesterol levels when discussing protective effects.
In Context
- "Despite normal HDL levels, the patient showed evidence of impaired HDL functionality on specialized testing." — lipid research study
- "HDL functionality assessment may explain paradoxical cardiovascular events in patients with high HDL levels." — cardiology case conference