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Updated: Aug 1, 2026
Cholesterol Efflux Assay
Published on: March 6, 2012
Evaluation of a high-content screening fluorescence-based assay analyzing the pharmacological modulation of lipid
Tobias Werner1, Gerhard Liebisch, Margot Grandl
1Institute for Clinical Chemistry and Laboratory Medicine, University of Regensburg, Germany.
Background:
For understanding cholesterol and phospholipid efflux pathways there is a need for cellular fluorescence-based high-content screens (HCS) to investigated the cholesterol and phospholipid content in human macrophages.
Methods:
Making use of fluorescence imaging based on HCS we have developed a tool to evaluate new agents that can act as inducers of cholesterol efflux. The fluorescence assay is based on the different staining patterns of cholesterol-loaded (E-LDL) and deloaded (HDL3) differentiated monocytes by the saturated, fluorescent lipid probe (1,2-dimyristoyl-sn-glycero-3-phospho-ethanolamine)-tetramethyl-rhodamin.
Results:
Morphologic examination and statistical evaluation of the staining pattern such as gray value, threshold area, shape factor and the spot size distribution provides evidence for a significant pattern change when cholesterol enriched and cholesterol depleted differentiated monocytes were imaged.
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