Product nameHDL Uptake Assay Kit (Fluorometric)
See all HDL kits
Sample typeAdherent cells, Suspension cells
Assay typeCell-based (quantitative)
Species reactivityReacts with: Other species, Mammals
HDL Uptake Assay Kit (Fluorometric) (ab204717) contains a fluorescently-labeled HDL that can be measured when taken up by cells. Unlabeled-HDL is included in the kit for assay validation.
High-density lipoprotein (HDL) consists of a protein shell, containing apolipoproteins A-I and A-II, and a hydrophobic core consisting of cholesterol and triglycerides surrounded by phospholipids and cholesterol esters. HDL transports cholesterol to the liver or steroidogenic organs such as adrenals, ovary, and testes by both direct and indirect pathways. HDL-Cholesterol is removed by HDL receptors such as scavenger receptor BI (SR-BI), which mediate the selective uptake of cholesterol from HDL. Clinically, high levels of HDL has been associated with cardiovascular health. This is due to the ability of HDL particle to transport cholesterol from lipid-laden macrophages of atherosclerotic arteries to the liver for secretion into the bile by a process called as reverse cholesterol transport.
Storage instructionsStore at -20°C. Please refer to protocols.
Components 100 tests Assay Buffer 1 x 100ml Fluorescently-labeled HDL (5 mg/ml) 1 x 1ml Unlabeled HDL (2X) 1 x 100µl
- Pathways and Processes
- Metabolic signaling pathways
- Lipid and lipoprotein metabolism
- Lipid metabolism
High-density lipoprotein (HDL) is one of the five major groups of lipoproteins, which, in order of sizes, largest to smallest, are chylomicrons, VLDL, IDL, LDL, and HDL, which enable lipids like cholesterol and triglycerides to be transported within the water-based bloodstream. In healthy individuals, about thirty percent of blood cholesterol is carried by HDL.
Blood tests typically report HDL-C level, i.e. the amount of cholesterol contained in HDL particles. It is often contrasted with low-density or LDL cholesterol or LDL-C. HDL particles are able to remove cholesterol from within artery atheroma and transport it back to the liver for excretion or re-utilization, which is the main reason why the cholesterol carried within HDL particles (HDL-C) is sometimes called "good cholesterol" (despite the fact that it is exactly the same as the cholesterol in LDL particles).
- High Density Lipoprotein
Fluorescently-labeled HDL Standard curve.
Fluorescently-labeled HDL uptake in HepG2 (hepatocytes) cells. Cells were starved for 4 hrs and incubated with Fluorescently-labeled HDL (10 µg) for 4 hrs. Fluorescently-labeled HDL (HDL) uptake was inhibited by SR-BI (HDL receptor) antibody (HDL + SRB1 Ab1), BLT1 (SR-BI Inhibitor; HDL + BLT1) and outcompeted by Unlabeled-HDL (HDL+ UL-HDL [20 µg]). Background was subtracted from the data (Wash off was subtracted as background).
This product has been referenced in:
- Huang Y et al. Long Noncoding RNA-H19 Contributes to Atherosclerosis and Induces Ischemic Stroke via the Upregulation of Acid Phosphatase 5. Front Neurol 10:32 (2019). Read more (PubMed: 30778327) »
- Zhu L et al. Hepatocyte estrogen receptor alpha mediates estrogen action to promote reverse cholesterol transport during Western-type diet feeding. Mol Metab 8:106-116 (2018). Read more (PubMed: 29331506) »