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Lipoprotein(a) as Orchestrator of Calcific Aortic Valve Stenosis

Johan G Schnitzler1, Lubna Ali1, Anouk G Groenen1

  • 1Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.

Biomolecules
|November 27, 2019
PubMed

Insights

Lipoprotein(a) [Lp(a)] is a key factor in aortic valve stenosis (AVS) development. Elevated Lp(a) levels increase the risk of AVS, driving valve calcification through specific molecular pathways.

Area of Science:

  • Cardiology
  • Biochemistry
  • Molecular Biology

Background:

  • Aortic valve stenosis (AVS) is a common, age-related valvular heart disease with high mortality if untreated.
  • Current treatments for AVS are limited to valve replacement; no effective pharmacological interventions exist.
  • Lipoprotein(a) [Lp(a)] is increasingly recognized for its role in cardiovascular calcification.

Purpose of the Study:

  • To review the critical role of Lipoprotein(a) [Lp(a)] in the pathophysiology of aortic valve stenosis (AVS).
  • To detail the molecular mechanisms by which Lp(a) contributes to aortic valve calcification.
  • To briefly discuss potential future therapeutic strategies for AVS.

Main Methods:

  • Literature review of studies investigating Lp(a) and AVS.
  • Analysis of molecular pathways involved in Lp(a)-mediated valve calcification.
  • Synthesis of current understanding of Lp(a)'s causal role in AVS.

Main Results:

  • Elevated Lp(a) levels are a significant risk factor for AVS hospitalization and mortality.
  • Lp(a) enters damaged aortic valve tissue, initiating a cascade involving autotaxin and lysophosphatidic acid (LysoPA).
  • This cascade activates inflammatory and calcification pathways (NF-κB, IL-6, BMP-2, RUNX2), leading to valve calcification.

Conclusions:

  • Lp(a) is a likely causal and independent risk factor for aortic valve stenosis.
  • Understanding the Lp(a)-driven molecular mechanisms provides targets for future AVS therapies.
  • Targeting Lp(a) may offer a novel approach for preventing or treating AVS.

Keywords:
aortic valve stenosiscalcificationlipoprotein(a), inflammationvalve interstitial cells

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