Influence of Lipoprotein (a) on Inflammatory Biomarkers in Metabolic Syndrome
Southern Medical Journal,  Clinical Article

Munoz–Torrero J et al. – Elevated Lp(a) plasma levels are associated with higher proinflammatory markers in patients newly diagnosed as having Metabolic Syndrome (MS).

Methods
  • Eighty-four white patients with MS were classified according to two Lp(a) levels (normal Lp[a]: < 30 mg/dL or high Lp[a]: > 30 mg/dL) and were compared with 42 healthy controls.
  • Oxidative stress biomarkers (oxidized low-density lipoprotein, antibodies to oxidized low-density lipoprotein, and nitric oxide metabolites) and proinflammatory cytokines (interleukin [IL]-2, IL-4, IL-5, IL-6, IL-10, IL-12P70, IL-13, and interferon-gamma) were measured in plasma.
  • Atherosclerotic significance was determined using carotid ultrasound and endothelial function by standardized protocols.

Results
  • Patients with MS had higher levels of serum cytokines, oxidative stress markers, and C-reactive protein, and greater atherosclerosis burden as compared with controls.
  • Among the group members, 58 patients had normal Lp(a) levels and 26 had high Lp(a) levels.
  • Cytokines and C-reactive protein levels were significantly higher in patients with high Lp(a) compared with those with normal Lp(a) (P < 0.01 for IL-2 and P < 0.001 for the others).
  • Nitric oxide metabolites were significantly lower in patients with high Lp(a) as compared with those with normal Lp(a) (P < 0.05).
  • No differences were found in oxidized low-density lipoprotein and atherosclerotic burden between the two groups of patients with MS with respect to Lp(a) levels.

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