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A Controlled Mouse Model for Neonatal Polymicrobial Sepsis
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Effect of sepsis syndrome on neonatal protein and energy metabolism

J D Mrozek1, M K Georgieff, B R Blazar

  • 1Infant Pulmonary Research Center, Children's Health Care-St. Paul, Minneapolis, MN, USA.

Journal of Perinatology : Official Journal of the California Perinatal Association
|April 29, 2000
PubMed

Insights

Neonatal sepsis triggers a hypermetabolic state, increasing energy expenditure and nitrogen loss. Nutritional support with protein may benefit septic neonates, with inflammatory markers indicating illness severity.

Area of Science:

  • Biomedical Science
  • Neonatology
  • Metabolic Research

Background:

  • Sepsis in neonates can significantly disrupt normal physiological processes.
  • Understanding the metabolic impact of sepsis is crucial for effective clinical management.
  • Inflammatory mediators like TNF-alpha, IL-6, and IL-1 beta are implicated in sepsis-related metabolic alterations.

Purpose of the Study:

  • To investigate the effects of septic illness on protein and energy metabolism in neonates.
  • To determine if inflammatory markers (TNF-alpha, IL-6, IL-1 beta) correlate with metabolic changes during neonatal sepsis.

Main Methods:

  • A study involving 31 infants categorized into septic, sick-nonseptic, healthy-nonseptic, and recovered septic groups.
  • Measurements included degree of illness, oxygen consumption, nitrogen balance, urine 3-methylhistidine/creatinine ratio (MeH/Cr), and levels of TNF-alpha, IL-6, IL-1 beta, and C-reactive protein (CRP).

Main Results:

  • Increased oxygen consumption and MeH/Cr, with decreased nitrogen balance, were observed as the severity of illness increased.
  • Nitrogen balance showed improvement upon recovery from sepsis.
  • Elevated levels of IL-6 and CRP were found in septic infants compared to non-septic groups.

Conclusions:

  • Neonates with sepsis exhibit a hypermetabolic response characterized by increased nitrogen loss, directly proportional to illness severity.
  • The findings suggest that enhanced protein substrate delivery could be nutritionally beneficial for septic neonates.
Abstract

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