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Immature anti-inflammatory response in neonates
C Schultz1, P Temming, P Bucsky
1Department of Paediatrics, Medical University of Lübeck, Lübeck, Germany. ChrSchultz@aol.com
Clinical and Experimental Immunology
|December 18, 2003
Summary
Neonates have an immature anti-inflammatory response, leading to reduced production of anti-inflammatory cytokines like IL-10. This immaturity may predispose infants to severe inflammatory effects during infection.
Area of Science:
- Immunology
- Neonatology
- Infectious Diseases
Background:
- The inflammatory response is critical in neonatal diseases.
- An imbalance between pro- and anti-inflammatory responses is implicated in cytokine production during infant infections.
Purpose of the Study:
- To compare the anti-inflammatory cytokine production capacity (IL-10, TGF-beta) in term infants, preterm infants, and adults.
- To investigate the response to anti-inflammatory stimuli in neonates.
Main Methods:
- Quantitative real-time reverse-transcribed PCR
- Flow cytometry
- Enzyme-linked immunoassay
Main Results:
- Term and preterm infants exhibited significantly lower IL-10 mRNA expression and production.
- Neonates had fewer TGF-beta-positive lymphocytes compared to adults.
- Infants showed reduced inhibition of pro-inflammatory cytokines (IL-1alpha, IL-6, IL-8, TNF-alpha) by IL-10.
Conclusions:
- Neonates possess a diminished anti-inflammatory capacity and a reduced response to anti-inflammatory stimuli.
- Neonates display an immature compensatory anti-inflammatory response syndrome (CARS).
- This immature CARS may increase preterm infants' susceptibility to harmful pro-inflammatory cytokine effects and organ damage during infection.