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Innate and Acquired Cellular Immunity in Children with Familial Hypercholesterolemia Treated with Simvastatin

Radosław Motkowski1, Marek Alifier2, Paweł Abramowicz1

  • 1Department of Pediatrics, Rheumatology, Immunology and Metabolic Bone Diseases, Medical University of Bialystok, 15-274 Bialystok, Poland.

Journal of Clinical Medicine
|May 28, 2022
PubMed

Insights

Simvastatin treatment in children with familial hypercholesterolemia (FH) did not alter white blood cell counts or lymphocyte subsets. However, it affected immune cell markers, suggesting a role for innate immunity in statin efficacy and safety during growth.

Area of Science:

  • Immunology
  • Pediatric Endocrinology
  • Pharmacology

Background:

  • Familial hypercholesterolemia (FH) is a genetic disorder leading to high cholesterol levels from birth.
  • Children with FH require early intervention, often including statin therapy, to reduce cardiovascular risk.
  • The impact of statins on pediatric cellular immunity remains incompletely understood.

Purpose of the Study:

  • To investigate the effects of simvastatin on cellular immunity parameters in children with FH.
  • To assess changes in leukocyte subsets, adhesion molecules (AM), and toll-like receptors (TLRs) following simvastatin treatment.

Main Methods:

  • Cross-sectional study involving 26 children with FH.
  • Comparison between 13 children treated with simvastatin (10 mg for ≥26 weeks) and 13 on a low-cholesterol diet.
  • Analysis included complete blood count, lipid profiles, flow cytometry for lymphocyte subsets, AM, and TLR expression (TLR-2, TLR-4) on leukocytes.

Main Results:

  • No significant differences in peripheral blood counts or lymphocyte subpopulations between groups.
  • Increased expression of adhesion molecules on granulocytes in the simvastatin-treated group.
  • Elevated TLR-2 expression on granulocytes/monocytes and decreased TLR-4 expression on lymphocytes/granulocytes in simvastatin-treated children.

Conclusions:

  • Simvastatin treatment in children with FH does not affect granulocyte/monocyte counts or lymphocyte patterns.
  • Statin therapy influences specific immune cell markers (AM, TLRs), indicating potential modulation of innate immunity.
  • Further research is needed to clarify the role of these immune changes in the efficacy and safety of simvastatin in growing children.

Keywords:
TLRsadhesion moleculesatherosclerosischildrenfamilial hypercholesterolemiaflow cytometrystatins

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