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Related Experiment Videos

Changes in serum lipoprotein pattern induced by acute infections.

K Sammalkorpi1, V Valtonen, Y Kerttula

  • 1Third Department of Medicine, University of Helsinki, Finland.

Metabolism: Clinical and Experimental
|September 1, 1988
PubMed
Summary

Acute infections significantly alter serum lipids and lipoproteins, reducing low-density lipoprotein (LDL) and high-density lipoprotein (HDL) levels. These changes impact cholesterol and triglyceride content, affecting cardiovascular risk during illness.

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Area of Science:

  • Biochemistry
  • Clinical Medicine
  • Lipid Metabolism

Background:

  • Acute infections are known to trigger systemic inflammatory responses.
  • Lipid and lipoprotein profiles are crucial indicators of cardiovascular health.
  • The impact of acute infections on specific lipoprotein fractions and their enzymatic regulation requires detailed investigation.

Purpose of the Study:

  • To investigate the dynamic changes in serum lipids and lipoproteins during acute infections.
  • To analyze alterations in apolipoproteins and lipolytic enzyme activities.
  • To compare these changes across viral and bacterial infections during acute, convalescent, and recovery phases.

Main Methods:

  • Measurement of lipoprotein concentrations and compositions in 72 infectious patients.

Related Experiment Videos

  • Quantification of apoproteins A-I, A-II, and B.
  • Assay of postheparin lipolytic enzyme activities: lipoprotein lipase (LPL) and hepatic lipase (HL).

    • Main Results:

    • Significant reductions in low-density lipoprotein (LDL) and high-density lipoprotein (HDL)2 mass concentrations, cholesterol, phospholipid, and protein content during acute infections.
    • LDL became triglyceride-enriched and cholesterol-poor, while HDL cholesterol/LDL cholesterol ratio decreased during convalescence.
    • Decreased concentrations of apo A-I and apo A-II; altered VLDL composition during convalescence; reduced LPL activity throughout infection phases and HL activity during the acute phase.

    Conclusions:

    • Acute infections induce significant, phase-dependent alterations in lipid and lipoprotein metabolism.
    • These alterations, including changes in LDL and HDL composition and enzyme activities, may contribute to increased cardiovascular risk.
    • Understanding these metabolic shifts is crucial for managing infectious diseases and their long-term sequelae.