Apolipoprotein A-1
Description:
Apolipoprotein A-1 is often measured in conjunction with other lipid parameters (including Apo B-100) to assess cardiovascular risk and monitor response to therapy.
Clinical details:
Apo A-1 comprises 65% of the Apo lipoprotein of HDL (high density lipoprotein), providing structural scaffold for its formation. It is also a co-factor for lecithin cholesterol acyl transferase (LCHAT), required for esterification of cholesterol to cholesteryl esters. HDL is involved in the reverse transport of cholesterol from peripheral tissues to the liver, from where it can be excreted. Hence Apo A-1 deficiency confers increased risk of coronary artery and peripheral vascular disease, even in the absence of other coronary risk factors.
Reference range:
Hypoalphalipoproteinaemia occurs at ApoA-I < 0.6g/L Cardiovascular risk increases with ApoA-I < 1.2 g/L Hyperalpalipoproteinaemia occurs at ApoA-I > 1.7 g/L
Units:
g/L
Department:
Location:
Sample type and Volume required:
Clotted (yellow SST tube). Serum.
Turnaround time:
3 days
Special sample instructions:
Seat the patient 5 minutes before sampling. Fasting sample preferred, but non-fasting acceptable. Patient should follow their normal diet for 3 weeks prior to sampling.
Contacts:
Reference Chemistry Laboratory at Blackfriars Hub
0204 591 0058
Reference Chemistry, 1st Floor Blackfriars Hub
41-43 Friars Bridge Court
Blackfriars Road
London
SE1 8NZ
41-43 Friars Bridge Court
Blackfriars Road
London
SE1 8NZ
Last updated: 30/01/2026
