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Acute-phase proteins in perinatal human plasma

S Liberatori1, L Bini, C De Felice

  • 1Cattedra di Neonatologia, Università degli Studi di Siena, Italy.

Electrophoresis
|March 1, 1997
PubMed
Summary

Newborn sepsis is associated with specific protein changes, including haptoglobin and serum amyloid A protein. These acute-phase proteins indicate the body

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Area of Science:

  • Biochemistry
  • Neonatal Medicine
  • Immunology

Background:

  • Early-onset sepsis is a critical condition in newborns.
  • Biomarkers for neonatal sepsis are crucial for timely diagnosis and treatment.
  • Acute-phase proteins are key indicators of inflammatory responses.

Purpose of the Study:

  • To investigate plasma protein profiles in newborns with early-onset sepsis.
  • To identify specific proteins associated with neonatal sepsis.
  • To explore the synthesis and modification of haptoglobin in newborns.

Main Methods:

  • Electrophoretic analysis of plasma samples from newborns with sepsis and healthy controls.
  • Time course monitoring of protein spot intensity.
  • Analysis of post-translational modifications, specifically sialylation, of haptoglobin chains.

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Main Results:

  • Haptoglobin and serum amyloid A protein were consistently elevated in newborns with sepsis.
  • Protein spot intensity showed dynamic changes, consistent with acute-phase responses.
  • Haptoglobin beta chains were undersialated in preterm newborns; alpha chain phenotypes differed from maternal serum, suggesting neonatal synthesis.

Conclusions:

  • Haptoglobin and serum amyloid A protein are potential biomarkers for early-onset neonatal sepsis.
  • Neonatal haptoglobin synthesis is indicated by specific chain modifications and differences from maternal proteins.
  • Understanding these protein dynamics aids in diagnosing and managing neonatal sepsis.