Journal
PEDIATRIC RESEARCH
Volume 65, Issue 5, Pages 98R-105RPublisher
NATURE PUBLISHING GROUP
DOI: 10.1203/PDR.0b013e31819f195d
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Funding
- AHA postdoctoral fellowship
- NIH [A1067353]
- Patterson Trust
- 3M Pharmaceuticals
- Idera Pharmaceuticals
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [R01AI067353] Funding Source: NIH RePORTER
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Molecular characterization of mechanisms by which human pattern recognition receptors (PRRs) detect danger signals has greatly expanded our understanding of the innate immune system. PRRs include Toll-like receptors, nucleotide oligomerization domain-like receptors, retinoic acid inducible gene-like receptors, and C-type lectin receptors. Characterization of the developmental expression of these systems in the fetus, newborn, and infant is incomplete but has yielded important insights into neonatal susceptibility to infection. Activation of PRRs on antigen-presenting cells enhances costimulatory function, and thus PRR agonists are potential vaccine adjuvants, some of which are already in clinical use. Thus, study of PRRs has also revealed how previously mysterious immunomodulators are able to mediate their actions, including the vaccine adjuvant aluminum hydroxide that activates a cytosolic protein complex known as the Nacht domain leucine-rich repeat and pyrin domain-containing protein 3 inflammasome leading to interleukin-1 beta production. Progress in characterizing PRRs is thus informing and expanding the design of improved adjuvants. This review summarizes recent developments in the field of innate immunity emphasizing developmental expression in the fetus, newborn, and infant and its implications for the design of more effective neonatal and infant vaccines. (Pediatr Res 65: 98R-105R, 2009)
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