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Updated: May 9, 2025

Cholesterol Efflux Assay
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Apolipoprotein A1 (CSL112) Increases Lecithin-Cholesterol Acyltransferase Levels in HDL Particles and Promotes

Rommel A Mathias1, Elena Velkoska1, Svetlana A Didichenko2

  • 1CSL Ltd, Melbourne, Australia.

JACC. Basic to Translational Science
|April 30, 2025
PubMed
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Infusing apolipoprotein A1 (ApoA1) via CSL112 improved high-density lipoprotein (HDL) function and cholesterol transport in heart attack patients. This therapy enhanced cholesterol efflux capacity and HDL levels, suggesting a potential cardiovascular benefit.

Area of Science:

  • Cardiovascular Medicine
  • Lipid Metabolism
  • Biochemistry

Background:

  • High-density lipoprotein (HDL) cholesterol levels are inversely associated with cardiovascular disease risk.
  • A growing focus is on enhancing HDL function and reverse cholesterol transport (RCT) using apolipoprotein A1 (ApoA1).

Purpose of the Study:

  • To evaluate the impact of apolipoprotein A1 (ApoA1) infusion (CSL112) on HDL protein composition, cholesterol esterification rate (CER), and cholesterol efflux capacity (CEC).
  • To assess these effects in patients recently treated for acute myocardial infarction.

Main Methods:

  • Patients treated post-acute myocardial infarction received ApoA1 (CSL112) infusion.
  • Analysis included HDL protein composition, CER, and CEC measurements before and after infusion.
Keywords:
CSL112acute myocardial infarctionhigh-density lipoproteinlecithin-cholesterol acyl transferaseproteome

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Main Results:

  • CSL112 infusion led to significant elevations in ApoA1, ApoM, and lecithin-cholesterol acyltransferase.
  • Levels of apolipoproteins A2, B, C, E, and serum amyloids A1 and A4 were reduced.
  • Observed increases in cholesterol efflux capacity (CEC), plasma HDL cholesterol, and cholesterol esterification rate (CER).

Conclusions:

  • ApoA1 (CSL112) infusion positively modulates HDL protein composition and function.
  • The treatment enhances key markers of reverse cholesterol transport, including CEC and CER.
  • These findings suggest CSL112's potential therapeutic role in improving cardiovascular health post-myocardial infarction.