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Understanding serum lipids is crucial for maintaining cardiovascular health and preventing heart disease and stroke.
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Atherogenic circulating lipoproteins in ischemic stroke.

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Altered lipoproteins, like modified low-density lipoprotein (LDL) and high-density lipoprotein (HDL), contribute to atherosclerosis. This review explores their role in carotid arteriosclerosis and ischemic stroke risk.

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Area of Science:

  • Cardiovascular Science
  • Neuroscience
  • Lipid Metabolism

Background:

  • Qualitative alterations in lipoproteins, including oxidized LDL (oxLDL), small dense LDL (sdLDL), and electronegative LDL [LDL(-)], are established drivers of atherosclerosis.
  • Modified LDL promotes cholesterol accumulation and inflammation, while high-density lipoprotein (HDL) offers protective anti-atherogenic effects.
  • These lipoprotein alterations are well-studied in coronary atherosclerosis linked to conditions like dyslipidemia and diabetes, but less so in ischemic stroke.

Purpose of the Study:

  • To review the relationship between qualitative changes in LDL and HDL.
  • To examine the role of these altered lipoproteins in the development of carotid arteriosclerosis.
  • To investigate the connection between altered lipoproteins, carotid arteriosclerosis, and the incidence of ischemic stroke.

Main Methods:

  • Review of existing in vitro and in vivo studies.
  • Analysis of molecular mechanisms underlying altered lipoprotein function.
  • Focus on research pertaining to coronary atherosclerosis and extending to carotid arteriosclerosis and ischemic stroke.

Main Results:

  • Modified LDL particles initiate atherogenic processes, including subendothelial cholesterol buildup and inflammatory responses.
  • HDL particles counteract these atherogenic effects, suggesting a protective role.
  • Pathological conditions can impair the normal functions of both LDL and HDL.

Conclusions:

  • Qualitative lipoprotein alterations are critical in atherogenesis.
  • Carotid arteriosclerosis, a precursor to ischemic stroke, is influenced by these lipoprotein changes.
  • Further research is needed to fully elucidate the link between altered lipoproteins and ischemic stroke risk via carotid disease.